mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
3a47cf3395
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31573 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
4369 lines
111 KiB
C
4369 lines
111 KiB
C
/*
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* zlib.c - An interface for zlib.
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*
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* Copyright (C) UENO Katsuhiro 2000-2003
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*
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* $Id$
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*/
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#include <ruby.h>
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#include <zlib.h>
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#include <time.h>
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#include <ruby/io.h>
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#ifdef HAVE_VALGRIND_MEMCHECK_H
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# include <valgrind/memcheck.h>
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# ifndef VALGRIND_MAKE_MEM_DEFINED
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# define VALGRIND_MAKE_MEM_DEFINED(p, n) VALGRIND_MAKE_READABLE((p), (n))
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# endif
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# ifndef VALGRIND_MAKE_MEM_UNDEFINED
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# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) VALGRIND_MAKE_WRITABLE((p), (n))
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# endif
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#else
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# define VALGRIND_MAKE_MEM_DEFINED(p, n) /* empty */
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# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) /* empty */
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#endif
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#define RUBY_ZLIB_VERSION "0.6.0"
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#define OBJ_IS_FREED(val) (RBASIC(val)->flags == 0)
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#ifndef GZIP_SUPPORT
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#define GZIP_SUPPORT 1
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#endif
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/* from zutil.h */
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#ifndef DEF_MEM_LEVEL
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#if MAX_MEM_LEVEL >= 8
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#define DEF_MEM_LEVEL 8
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#else
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#define DEF_MEM_LEVEL MAX_MEM_LEVEL
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#endif
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#endif
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#if SIZEOF_LONG > SIZEOF_INT
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static inline uInt
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max_uint(long n)
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{
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if (n > UINT_MAX) n = UINT_MAX;
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return (uInt)n;
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}
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#define MAX_UINT(n) max_uint(n)
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#else
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#define MAX_UINT(n) (uInt)(n)
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#endif
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#define sizeof(x) ((int)sizeof(x))
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/*--------- Prototypes --------*/
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static NORETURN(void raise_zlib_error(int, const char*));
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static VALUE rb_zlib_version(VALUE);
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static VALUE do_checksum(int, VALUE*, uLong (*)(uLong, const Bytef*, uInt));
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static VALUE rb_zlib_adler32(int, VALUE*, VALUE);
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static VALUE rb_zlib_crc32(int, VALUE*, VALUE);
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static VALUE rb_zlib_crc_table(VALUE);
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static voidpf zlib_mem_alloc(voidpf, uInt, uInt);
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static void zlib_mem_free(voidpf, voidpf);
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static void finalizer_warn(const char*);
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struct zstream;
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struct zstream_funcs;
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static void zstream_init(struct zstream*, const struct zstream_funcs*);
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static void zstream_expand_buffer(struct zstream*);
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static void zstream_expand_buffer_into(struct zstream*, unsigned long);
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static void zstream_append_buffer(struct zstream*, const Bytef*, long);
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static VALUE zstream_detach_buffer(struct zstream*);
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static VALUE zstream_shift_buffer(struct zstream*, long);
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static void zstream_buffer_ungets(struct zstream*, const Bytef*, unsigned long);
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static void zstream_buffer_ungetbyte(struct zstream*, int);
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static void zstream_append_input(struct zstream*, const Bytef*, long);
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static void zstream_discard_input(struct zstream*, long);
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static void zstream_reset_input(struct zstream*);
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static void zstream_passthrough_input(struct zstream*);
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static VALUE zstream_detach_input(struct zstream*);
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static void zstream_reset(struct zstream*);
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static VALUE zstream_end(struct zstream*);
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static void zstream_run(struct zstream*, Bytef*, long, int);
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static VALUE zstream_sync(struct zstream*, Bytef*, long);
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static void zstream_mark(struct zstream*);
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static void zstream_free(struct zstream*);
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static VALUE zstream_new(VALUE, const struct zstream_funcs*);
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static struct zstream *get_zstream(VALUE);
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static void zstream_finalize(struct zstream*);
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static VALUE rb_zstream_end(VALUE);
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static VALUE rb_zstream_reset(VALUE);
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static VALUE rb_zstream_finish(VALUE);
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static VALUE rb_zstream_flush_next_in(VALUE);
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static VALUE rb_zstream_flush_next_out(VALUE);
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static VALUE rb_zstream_avail_out(VALUE);
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static VALUE rb_zstream_set_avail_out(VALUE, VALUE);
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static VALUE rb_zstream_avail_in(VALUE);
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static VALUE rb_zstream_total_in(VALUE);
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static VALUE rb_zstream_total_out(VALUE);
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static VALUE rb_zstream_data_type(VALUE);
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static VALUE rb_zstream_adler(VALUE);
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static VALUE rb_zstream_finished_p(VALUE);
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static VALUE rb_zstream_closed_p(VALUE);
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static VALUE rb_deflate_s_allocate(VALUE);
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static VALUE rb_deflate_initialize(int, VALUE*, VALUE);
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static VALUE rb_deflate_init_copy(VALUE, VALUE);
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static VALUE deflate_run(VALUE);
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static VALUE rb_deflate_s_deflate(int, VALUE*, VALUE);
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static void do_deflate(struct zstream*, VALUE, int);
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static VALUE rb_deflate_deflate(int, VALUE*, VALUE);
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static VALUE rb_deflate_addstr(VALUE, VALUE);
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static VALUE rb_deflate_flush(int, VALUE*, VALUE);
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static VALUE rb_deflate_params(VALUE, VALUE, VALUE);
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static VALUE rb_deflate_set_dictionary(VALUE, VALUE);
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static VALUE inflate_run(VALUE);
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static VALUE rb_inflate_s_allocate(VALUE);
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static VALUE rb_inflate_initialize(int, VALUE*, VALUE);
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static VALUE rb_inflate_s_inflate(VALUE, VALUE);
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static void do_inflate(struct zstream*, VALUE);
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static VALUE rb_inflate_inflate(VALUE, VALUE);
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static VALUE rb_inflate_addstr(VALUE, VALUE);
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static VALUE rb_inflate_sync(VALUE, VALUE);
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static VALUE rb_inflate_sync_point_p(VALUE);
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static VALUE rb_inflate_set_dictionary(VALUE, VALUE);
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#if GZIP_SUPPORT
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struct gzfile;
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static void gzfile_mark(struct gzfile*);
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static void gzfile_free(struct gzfile*);
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static VALUE gzfile_new(VALUE, const struct zstream_funcs*, void (*) _((struct gzfile*)));
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static void gzfile_reset(struct gzfile*);
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static void gzfile_close(struct gzfile*, int);
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static void gzfile_write_raw(struct gzfile*);
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static VALUE gzfile_read_raw_partial(VALUE);
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static VALUE gzfile_read_raw_rescue(VALUE);
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static VALUE gzfile_read_raw(struct gzfile*);
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static int gzfile_read_raw_ensure(struct gzfile*, long);
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static char *gzfile_read_raw_until_zero(struct gzfile*, long);
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static unsigned int gzfile_get16(const unsigned char*);
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static unsigned long gzfile_get32(const unsigned char*);
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static void gzfile_set32(unsigned long n, unsigned char*);
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static void gzfile_make_header(struct gzfile*);
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static void gzfile_make_footer(struct gzfile*);
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static void gzfile_read_header(struct gzfile*);
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static void gzfile_check_footer(struct gzfile*);
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static void gzfile_write(struct gzfile*, Bytef*, long);
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static long gzfile_read_more(struct gzfile*);
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static void gzfile_calc_crc(struct gzfile*, VALUE);
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static VALUE gzfile_read(struct gzfile*, long);
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static VALUE gzfile_read_all(struct gzfile*);
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static void gzfile_ungets(struct gzfile*, const Bytef*, long);
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static void gzfile_ungetbyte(struct gzfile*, int);
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static VALUE gzfile_writer_end_run(VALUE);
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static void gzfile_writer_end(struct gzfile*);
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static VALUE gzfile_reader_end_run(VALUE);
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static void gzfile_reader_end(struct gzfile*);
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static void gzfile_reader_rewind(struct gzfile*);
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static VALUE gzfile_reader_get_unused(struct gzfile*);
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static struct gzfile *get_gzfile(VALUE);
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static VALUE gzfile_ensure_close(VALUE);
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static VALUE rb_gzfile_s_wrap(int, VALUE*, VALUE);
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static VALUE gzfile_s_open(int, VALUE*, VALUE, const char*);
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NORETURN(static void gzfile_raise(struct gzfile *, VALUE, const char *));
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static VALUE gzfile_error_inspect(VALUE);
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static VALUE rb_gzfile_to_io(VALUE);
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static VALUE rb_gzfile_crc(VALUE);
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static VALUE rb_gzfile_mtime(VALUE);
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static VALUE rb_gzfile_level(VALUE);
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static VALUE rb_gzfile_os_code(VALUE);
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static VALUE rb_gzfile_orig_name(VALUE);
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static VALUE rb_gzfile_comment(VALUE);
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static VALUE rb_gzfile_lineno(VALUE);
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static VALUE rb_gzfile_set_lineno(VALUE, VALUE);
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static VALUE rb_gzfile_set_mtime(VALUE, VALUE);
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static VALUE rb_gzfile_set_orig_name(VALUE, VALUE);
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static VALUE rb_gzfile_set_comment(VALUE, VALUE);
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static VALUE rb_gzfile_close(VALUE);
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static VALUE rb_gzfile_finish(VALUE);
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static VALUE rb_gzfile_closed_p(VALUE);
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static VALUE rb_gzfile_eof_p(VALUE);
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static VALUE rb_gzfile_sync(VALUE);
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static VALUE rb_gzfile_set_sync(VALUE, VALUE);
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static VALUE rb_gzfile_total_in(VALUE);
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static VALUE rb_gzfile_total_out(VALUE);
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static VALUE rb_gzfile_path(VALUE);
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static VALUE rb_gzwriter_s_allocate(VALUE);
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static VALUE rb_gzwriter_s_open(int, VALUE*, VALUE);
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static VALUE rb_gzwriter_initialize(int, VALUE*, VALUE);
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static VALUE rb_gzwriter_flush(int, VALUE*, VALUE);
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static VALUE rb_gzwriter_write(VALUE, VALUE);
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static VALUE rb_gzwriter_putc(VALUE, VALUE);
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static VALUE rb_gzreader_s_allocate(VALUE);
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static VALUE rb_gzreader_s_open(int, VALUE*, VALUE);
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static VALUE rb_gzreader_initialize(int, VALUE*, VALUE);
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static VALUE rb_gzreader_rewind(VALUE);
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static VALUE rb_gzreader_unused(VALUE);
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static VALUE rb_gzreader_read(int, VALUE*, VALUE);
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static VALUE rb_gzreader_getc(VALUE);
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static VALUE rb_gzreader_readchar(VALUE);
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static VALUE rb_gzreader_each_byte(VALUE);
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static VALUE rb_gzreader_ungetc(VALUE, VALUE);
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static VALUE rb_gzreader_ungetbyte(VALUE, VALUE);
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static void gzreader_skip_linebreaks(struct gzfile*);
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static VALUE gzreader_gets(int, VALUE*, VALUE);
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static VALUE rb_gzreader_gets(int, VALUE*, VALUE);
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static VALUE rb_gzreader_readline(int, VALUE*, VALUE);
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static VALUE rb_gzreader_each(int, VALUE*, VALUE);
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static VALUE rb_gzreader_readlines(int, VALUE*, VALUE);
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#endif /* GZIP_SUPPORT */
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/*
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* Document-module: Zlib
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*
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* == Overview
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*
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* Access to the zlib library.
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*
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* == Class tree
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*
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* - Zlib::Deflate
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* - Zlib::Inflate
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* - Zlib::ZStream
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* - Zlib::Error
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* - Zlib::StreamEnd
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* - Zlib::NeedDict
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* - Zlib::DataError
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* - Zlib::StreamError
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* - Zlib::MemError
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* - Zlib::BufError
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* - Zlib::VersionError
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*
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* (if you have GZIP_SUPPORT)
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* - Zlib::GzipReader
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* - Zlib::GzipWriter
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* - Zlib::GzipFile
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* - Zlib::GzipFile::Error
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* - Zlib::GzipFile::LengthError
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* - Zlib::GzipFile::CRCError
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* - Zlib::GzipFile::NoFooter
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*
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* see also zlib.h
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*
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*/
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void Init_zlib(void);
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/*--------- Exceptions --------*/
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static VALUE cZError, cStreamEnd, cNeedDict;
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static VALUE cStreamError, cDataError, cMemError, cBufError, cVersionError;
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static void
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raise_zlib_error(int err, const char *msg)
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{
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VALUE exc;
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if (!msg) {
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msg = zError(err);
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}
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switch(err) {
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case Z_STREAM_END:
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exc = rb_exc_new2(cStreamEnd, msg);
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break;
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case Z_NEED_DICT:
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exc = rb_exc_new2(cNeedDict, msg);
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break;
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case Z_STREAM_ERROR:
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exc = rb_exc_new2(cStreamError, msg);
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break;
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case Z_DATA_ERROR:
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exc = rb_exc_new2(cDataError, msg);
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break;
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case Z_BUF_ERROR:
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exc = rb_exc_new2(cBufError, msg);
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break;
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case Z_VERSION_ERROR:
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exc = rb_exc_new2(cVersionError, msg);
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break;
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case Z_MEM_ERROR:
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exc = rb_exc_new2(cMemError, msg);
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break;
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case Z_ERRNO:
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rb_sys_fail(msg);
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/* no return */
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default:
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{
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char buf[BUFSIZ];
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snprintf(buf, BUFSIZ, "unknown zlib error %d: %s", err, msg);
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exc = rb_exc_new2(cZError, buf);
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}
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}
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rb_exc_raise(exc);
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}
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/*--- Warning (in finalizer) ---*/
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static void
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finalizer_warn(const char *msg)
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{
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fprintf(stderr, "zlib(finalizer): %s\n", msg);
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}
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/*-------- module Zlib --------*/
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/*
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* Document-method: Zlib.zlib_version
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*
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* Returns the string which represents the version of zlib library.
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*/
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static VALUE
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rb_zlib_version(VALUE klass)
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{
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VALUE str;
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str = rb_str_new2(zlibVersion());
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OBJ_TAINT(str); /* for safe */
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return str;
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}
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#if SIZEOF_LONG > SIZEOF_INT
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static uLong
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checksum_long(uLong (*func)(uLong, const Bytef*, uInt), uLong sum, const Bytef *ptr, long len)
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{
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if (len > UINT_MAX) {
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do {
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sum = func(sum, ptr, UINT_MAX);
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ptr += UINT_MAX;
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len -= UINT_MAX;
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} while (len >= UINT_MAX);
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}
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if (len > 0) sum = func(sum, ptr, (uInt)len);
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return sum;
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}
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#else
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#define checksum_long(func, sum, ptr, len) (func)((sum), (ptr), (len))
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#endif
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static VALUE
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do_checksum(argc, argv, func)
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int argc;
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VALUE *argv;
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uLong (*func)(uLong, const Bytef*, uInt);
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{
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VALUE str, vsum;
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unsigned long sum;
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rb_scan_args(argc, argv, "02", &str, &vsum);
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if (!NIL_P(vsum)) {
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sum = NUM2ULONG(vsum);
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}
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else if (NIL_P(str)) {
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sum = 0;
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}
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else {
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sum = func(0, Z_NULL, 0);
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}
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if (NIL_P(str)) {
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sum = func(sum, Z_NULL, 0);
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}
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else {
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StringValue(str);
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sum = checksum_long(func, sum, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str));
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}
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return rb_uint2inum(sum);
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}
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/*
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* Document-method: Zlib.adler32
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*
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* call-seq: Zlib.adler32(string, adler)
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*
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* Calculates Adler-32 checksum for +string+, and returns updated value of
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* +adler+. If +string+ is omitted, it returns the Adler-32 initial value. If
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* +adler+ is omitted, it assumes that the initial value is given to +adler+.
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*
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* FIXME: expression.
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*/
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static VALUE
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rb_zlib_adler32(int argc, VALUE *argv, VALUE klass)
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{
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return do_checksum(argc, argv, adler32);
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}
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#ifdef HAVE_ADLER32_COMBINE
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/*
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* Document-method: Zlib.adler32_combine
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*
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* call-seq: Zlib.adler32_combine(adler1, adler2, len2)
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*
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* Combine two Adler-32 check values in to one. +alder1+ is the first Adler-32
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* value, +adler2+ is the second Adler-32 value. +len2+ is the length of the
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* string used to generate +adler2+.
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*
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*/
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static VALUE
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rb_zlib_adler32_combine(VALUE klass, VALUE adler1, VALUE adler2, VALUE len2)
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{
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return ULONG2NUM(
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adler32_combine(NUM2ULONG(adler1), NUM2ULONG(adler2), NUM2LONG(len2)));
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}
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#else
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#define rb_zlib_adler32_combine rb_f_notimplement
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#endif
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/*
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|
* Document-method: Zlib.crc32
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*
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* call-seq: Zlib.crc32(string, adler)
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*
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* Calculates CRC checksum for +string+, and returns updated value of +crc+. If
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* +string+ is omitted, it returns the CRC initial value. If +crc+ is omitted, it
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* assumes that the initial value is given to +crc+.
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*
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* FIXME: expression.
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*/
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static VALUE
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rb_zlib_crc32(int argc, VALUE *argv, VALUE klass)
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{
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return do_checksum(argc, argv, crc32);
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}
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#ifdef HAVE_CRC32_COMBINE
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/*
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* Document-method: Zlib.crc32_combine
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*
|
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* call-seq: Zlib.crc32_combine(crc1, crc2, len2)
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*
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* Combine two CRC-32 check values in to one. +crc1+ is the first CRC-32
|
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* value, +crc2+ is the second CRC-32 value. +len2+ is the length of the
|
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* string used to generate +crc2+.
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*
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*/
|
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static VALUE
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rb_zlib_crc32_combine(VALUE klass, VALUE crc1, VALUE crc2, VALUE len2)
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{
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return ULONG2NUM(
|
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crc32_combine(NUM2ULONG(crc1), NUM2ULONG(crc2), NUM2LONG(len2)));
|
|
}
|
|
#else
|
|
#define rb_zlib_crc32_combine rb_f_notimplement
|
|
#endif
|
|
|
|
/*
|
|
* Document-method: Zlib.crc_table
|
|
*
|
|
* Returns the table for calculating CRC checksum as an array.
|
|
*/
|
|
static VALUE
|
|
rb_zlib_crc_table(VALUE obj)
|
|
{
|
|
const unsigned long *crctbl;
|
|
VALUE dst;
|
|
int i;
|
|
|
|
crctbl = get_crc_table();
|
|
dst = rb_ary_new2(256);
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
rb_ary_push(dst, rb_uint2inum(crctbl[i]));
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
|
|
|
|
/*-------- zstream - internal APIs --------*/
|
|
|
|
struct zstream {
|
|
unsigned long flags;
|
|
VALUE buf;
|
|
long buf_filled;
|
|
VALUE input;
|
|
z_stream stream;
|
|
const struct zstream_funcs {
|
|
int (*reset)(z_streamp);
|
|
int (*end)(z_streamp);
|
|
int (*run)(z_streamp, int);
|
|
} *func;
|
|
};
|
|
|
|
#define ZSTREAM_FLAG_READY 0x1
|
|
#define ZSTREAM_FLAG_IN_STREAM 0x2
|
|
#define ZSTREAM_FLAG_FINISHED 0x4
|
|
#define ZSTREAM_FLAG_CLOSING 0x8
|
|
#define ZSTREAM_FLAG_UNUSED 0x10
|
|
|
|
#define ZSTREAM_READY(z) ((z)->flags |= ZSTREAM_FLAG_READY)
|
|
#define ZSTREAM_IS_READY(z) ((z)->flags & ZSTREAM_FLAG_READY)
|
|
#define ZSTREAM_IS_FINISHED(z) ((z)->flags & ZSTREAM_FLAG_FINISHED)
|
|
#define ZSTREAM_IS_CLOSING(z) ((z)->flags & ZSTREAM_FLAG_CLOSING)
|
|
|
|
/* I think that more better value should be found,
|
|
but I gave up finding it. B) */
|
|
#define ZSTREAM_INITIAL_BUFSIZE 1024
|
|
#define ZSTREAM_AVAIL_OUT_STEP_MAX 16384
|
|
#define ZSTREAM_AVAIL_OUT_STEP_MIN 2048
|
|
|
|
static const struct zstream_funcs deflate_funcs = {
|
|
deflateReset, deflateEnd, deflate,
|
|
};
|
|
|
|
static const struct zstream_funcs inflate_funcs = {
|
|
inflateReset, inflateEnd, inflate,
|
|
};
|
|
|
|
|
|
static voidpf
|
|
zlib_mem_alloc(voidpf opaque, uInt items, uInt size)
|
|
{
|
|
voidpf p = xmalloc(items * size);
|
|
/* zlib FAQ: Valgrind (or some similar memory access checker) says that
|
|
deflate is performing a conditional jump that depends on an
|
|
uninitialized value. Isn't that a bug?
|
|
http://www.zlib.net/zlib_faq.html#faq36 */
|
|
VALGRIND_MAKE_MEM_DEFINED(p, items * size);
|
|
return p;
|
|
}
|
|
|
|
static void
|
|
zlib_mem_free(voidpf opaque, voidpf address)
|
|
{
|
|
xfree(address);
|
|
}
|
|
|
|
static void
|
|
zstream_init(struct zstream *z, const struct zstream_funcs *func)
|
|
{
|
|
z->flags = 0;
|
|
z->buf = Qnil;
|
|
z->buf_filled = 0;
|
|
z->input = Qnil;
|
|
z->stream.zalloc = zlib_mem_alloc;
|
|
z->stream.zfree = zlib_mem_free;
|
|
z->stream.opaque = Z_NULL;
|
|
z->stream.msg = Z_NULL;
|
|
z->stream.next_in = Z_NULL;
|
|
z->stream.avail_in = 0;
|
|
z->stream.next_out = Z_NULL;
|
|
z->stream.avail_out = 0;
|
|
z->func = func;
|
|
}
|
|
|
|
#define zstream_init_deflate(z) zstream_init((z), &deflate_funcs)
|
|
#define zstream_init_inflate(z) zstream_init((z), &inflate_funcs)
|
|
|
|
static void
|
|
zstream_expand_buffer(struct zstream *z)
|
|
{
|
|
long inc;
|
|
|
|
if (NIL_P(z->buf)) {
|
|
/* I uses rb_str_new here not rb_str_buf_new because
|
|
rb_str_buf_new makes a zero-length string. */
|
|
z->buf = rb_str_new(0, ZSTREAM_INITIAL_BUFSIZE);
|
|
z->buf_filled = 0;
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf);
|
|
z->stream.avail_out = ZSTREAM_INITIAL_BUFSIZE;
|
|
RBASIC(z->buf)->klass = 0;
|
|
return;
|
|
}
|
|
|
|
if (RSTRING_LEN(z->buf) - z->buf_filled >= ZSTREAM_AVAIL_OUT_STEP_MAX) {
|
|
/* to keep other threads from freezing */
|
|
z->stream.avail_out = ZSTREAM_AVAIL_OUT_STEP_MAX;
|
|
}
|
|
else {
|
|
inc = z->buf_filled / 2;
|
|
if (inc < ZSTREAM_AVAIL_OUT_STEP_MIN) {
|
|
inc = ZSTREAM_AVAIL_OUT_STEP_MIN;
|
|
}
|
|
rb_str_resize(z->buf, z->buf_filled + inc);
|
|
z->stream.avail_out = (inc < ZSTREAM_AVAIL_OUT_STEP_MAX) ?
|
|
(int)inc : ZSTREAM_AVAIL_OUT_STEP_MAX;
|
|
}
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf) + z->buf_filled;
|
|
}
|
|
|
|
static void
|
|
zstream_expand_buffer_into(struct zstream *z, unsigned long size)
|
|
{
|
|
if (NIL_P(z->buf)) {
|
|
/* I uses rb_str_new here not rb_str_buf_new because
|
|
rb_str_buf_new makes a zero-length string. */
|
|
z->buf = rb_str_new(0, size);
|
|
z->buf_filled = 0;
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf);
|
|
z->stream.avail_out = MAX_UINT(size);
|
|
RBASIC(z->buf)->klass = 0;
|
|
}
|
|
else if (z->stream.avail_out != size) {
|
|
rb_str_resize(z->buf, z->buf_filled + size);
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf) + z->buf_filled;
|
|
z->stream.avail_out = MAX_UINT(size);
|
|
}
|
|
}
|
|
|
|
static void
|
|
zstream_append_buffer(struct zstream *z, const Bytef *src, long len)
|
|
{
|
|
if (NIL_P(z->buf)) {
|
|
z->buf = rb_str_buf_new(len);
|
|
rb_str_buf_cat(z->buf, (const char*)src, len);
|
|
z->buf_filled = len;
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf);
|
|
z->stream.avail_out = 0;
|
|
RBASIC(z->buf)->klass = 0;
|
|
return;
|
|
}
|
|
|
|
if (RSTRING_LEN(z->buf) < z->buf_filled + len) {
|
|
rb_str_resize(z->buf, z->buf_filled + len);
|
|
z->stream.avail_out = 0;
|
|
}
|
|
else {
|
|
if (z->stream.avail_out >= (uInt)len) {
|
|
z->stream.avail_out -= (uInt)len;
|
|
}
|
|
else {
|
|
z->stream.avail_out = 0;
|
|
}
|
|
}
|
|
memcpy(RSTRING_PTR(z->buf) + z->buf_filled, src, len);
|
|
z->buf_filled += len;
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf) + z->buf_filled;
|
|
}
|
|
|
|
#define zstream_append_buffer2(z,v) \
|
|
zstream_append_buffer((z),(Bytef*)RSTRING_PTR(v),RSTRING_LEN(v))
|
|
|
|
static VALUE
|
|
zstream_detach_buffer(struct zstream *z)
|
|
{
|
|
VALUE dst;
|
|
|
|
if (NIL_P(z->buf)) {
|
|
dst = rb_str_new(0, 0);
|
|
}
|
|
else {
|
|
dst = z->buf;
|
|
rb_str_resize(dst, z->buf_filled);
|
|
RBASIC(dst)->klass = rb_cString;
|
|
}
|
|
|
|
z->buf = Qnil;
|
|
z->buf_filled = 0;
|
|
z->stream.next_out = 0;
|
|
z->stream.avail_out = 0;
|
|
return dst;
|
|
}
|
|
|
|
static VALUE
|
|
zstream_shift_buffer(struct zstream *z, long len)
|
|
{
|
|
VALUE dst;
|
|
long buflen;
|
|
|
|
if (z->buf_filled <= len) {
|
|
return zstream_detach_buffer(z);
|
|
}
|
|
|
|
dst = rb_str_subseq(z->buf, 0, len);
|
|
RBASIC(dst)->klass = rb_cString;
|
|
z->buf_filled -= len;
|
|
memmove(RSTRING_PTR(z->buf), RSTRING_PTR(z->buf) + len,
|
|
z->buf_filled);
|
|
z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf) + z->buf_filled;
|
|
buflen = RSTRING_LEN(z->buf) - z->buf_filled;
|
|
if (buflen > ZSTREAM_AVAIL_OUT_STEP_MAX) {
|
|
buflen = ZSTREAM_AVAIL_OUT_STEP_MAX;
|
|
}
|
|
z->stream.avail_out = (uInt)buflen;
|
|
|
|
return dst;
|
|
}
|
|
|
|
static void
|
|
zstream_buffer_ungets(struct zstream *z, const Bytef *b, unsigned long len)
|
|
{
|
|
if (NIL_P(z->buf) || RSTRING_LEN(z->buf) - z->buf_filled == 0) {
|
|
zstream_expand_buffer_into(z, len);
|
|
}
|
|
|
|
memmove(RSTRING_PTR(z->buf) + len, RSTRING_PTR(z->buf), z->buf_filled);
|
|
memmove(RSTRING_PTR(z->buf), b, len);
|
|
z->buf_filled+=len;
|
|
if (z->stream.avail_out > 0) {
|
|
if (len > z->stream.avail_out) len = z->stream.avail_out;
|
|
z->stream.next_out+=len;
|
|
z->stream.avail_out-=(uInt)len;
|
|
}
|
|
}
|
|
|
|
static void
|
|
zstream_buffer_ungetbyte(struct zstream *z, int c)
|
|
{
|
|
if (NIL_P(z->buf) || RSTRING_LEN(z->buf) - z->buf_filled == 0) {
|
|
zstream_expand_buffer(z);
|
|
}
|
|
|
|
memmove(RSTRING_PTR(z->buf) + 1, RSTRING_PTR(z->buf), z->buf_filled);
|
|
RSTRING_PTR(z->buf)[0] = (char)c;
|
|
z->buf_filled++;
|
|
if (z->stream.avail_out > 0) {
|
|
z->stream.next_out++;
|
|
z->stream.avail_out--;
|
|
}
|
|
}
|
|
|
|
static void
|
|
zstream_append_input(struct zstream *z, const Bytef *src, long len)
|
|
{
|
|
if (len <= 0) return;
|
|
|
|
if (NIL_P(z->input)) {
|
|
z->input = rb_str_buf_new(len);
|
|
rb_str_buf_cat(z->input, (const char*)src, len);
|
|
RBASIC(z->input)->klass = 0;
|
|
}
|
|
else {
|
|
rb_str_buf_cat(z->input, (const char*)src, len);
|
|
}
|
|
}
|
|
|
|
#define zstream_append_input2(z,v)\
|
|
RB_GC_GUARD(v),\
|
|
zstream_append_input((z), (Bytef*)RSTRING_PTR(v), RSTRING_LEN(v))
|
|
|
|
static void
|
|
zstream_discard_input(struct zstream *z, long len)
|
|
{
|
|
if (NIL_P(z->input) || RSTRING_LEN(z->input) <= len) {
|
|
z->input = Qnil;
|
|
}
|
|
else {
|
|
memmove(RSTRING_PTR(z->input), RSTRING_PTR(z->input) + len,
|
|
RSTRING_LEN(z->input) - len);
|
|
rb_str_resize(z->input, RSTRING_LEN(z->input) - len);
|
|
}
|
|
}
|
|
|
|
static void
|
|
zstream_reset_input(struct zstream *z)
|
|
{
|
|
z->input = Qnil;
|
|
}
|
|
|
|
static void
|
|
zstream_passthrough_input(struct zstream *z)
|
|
{
|
|
if (!NIL_P(z->input)) {
|
|
zstream_append_buffer2(z, z->input);
|
|
z->input = Qnil;
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
zstream_detach_input(struct zstream *z)
|
|
{
|
|
VALUE dst;
|
|
|
|
if (NIL_P(z->input)) {
|
|
dst = rb_str_new(0, 0);
|
|
}
|
|
else {
|
|
dst = z->input;
|
|
RBASIC(dst)->klass = rb_cString;
|
|
}
|
|
z->input = Qnil;
|
|
RBASIC(dst)->klass = rb_cString;
|
|
return dst;
|
|
}
|
|
|
|
static void
|
|
zstream_reset(struct zstream *z)
|
|
{
|
|
int err;
|
|
|
|
err = z->func->reset(&z->stream);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
z->flags = ZSTREAM_FLAG_READY;
|
|
z->buf = Qnil;
|
|
z->buf_filled = 0;
|
|
z->stream.next_out = 0;
|
|
z->stream.avail_out = 0;
|
|
zstream_reset_input(z);
|
|
}
|
|
|
|
static VALUE
|
|
zstream_end(struct zstream *z)
|
|
{
|
|
int err;
|
|
|
|
if (!ZSTREAM_IS_READY(z)) {
|
|
rb_warning("attempt to close uninitialized zstream; ignored.");
|
|
return Qnil;
|
|
}
|
|
if (z->flags & ZSTREAM_FLAG_IN_STREAM) {
|
|
rb_warning("attempt to close unfinished zstream; reset forced.");
|
|
zstream_reset(z);
|
|
}
|
|
|
|
zstream_reset_input(z);
|
|
err = z->func->end(&z->stream);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
z->flags = 0;
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
zstream_run(struct zstream *z, Bytef *src, long len, int flush)
|
|
{
|
|
uInt n;
|
|
int err;
|
|
volatile VALUE guard = Qnil;
|
|
|
|
if (NIL_P(z->input) && len == 0) {
|
|
z->stream.next_in = (Bytef*)"";
|
|
z->stream.avail_in = 0;
|
|
}
|
|
else {
|
|
zstream_append_input(z, src, len);
|
|
z->stream.next_in = (Bytef*)RSTRING_PTR(z->input);
|
|
z->stream.avail_in = MAX_UINT(RSTRING_LEN(z->input));
|
|
/* keep reference to `z->input' so as not to be garbage collected
|
|
after zstream_reset_input() and prevent `z->stream.next_in'
|
|
from dangling. */
|
|
guard = z->input;
|
|
}
|
|
|
|
if (z->stream.avail_out == 0) {
|
|
zstream_expand_buffer(z);
|
|
}
|
|
|
|
for (;;) {
|
|
/* VC allocates err and guard to same address. accessing err and guard
|
|
in same scope prevents it. */
|
|
RB_GC_GUARD(guard);
|
|
n = z->stream.avail_out;
|
|
err = z->func->run(&z->stream, flush);
|
|
z->buf_filled += n - z->stream.avail_out;
|
|
rb_thread_schedule();
|
|
|
|
if (err == Z_STREAM_END) {
|
|
z->flags &= ~ZSTREAM_FLAG_IN_STREAM;
|
|
z->flags |= ZSTREAM_FLAG_FINISHED;
|
|
break;
|
|
}
|
|
if (err != Z_OK) {
|
|
if (flush != Z_FINISH && err == Z_BUF_ERROR
|
|
&& z->stream.avail_out > 0) {
|
|
z->flags |= ZSTREAM_FLAG_IN_STREAM;
|
|
break;
|
|
}
|
|
zstream_reset_input(z);
|
|
if (z->stream.avail_in > 0) {
|
|
zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
|
|
}
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
if (z->stream.avail_out > 0) {
|
|
z->flags |= ZSTREAM_FLAG_IN_STREAM;
|
|
break;
|
|
}
|
|
zstream_expand_buffer(z);
|
|
}
|
|
|
|
zstream_reset_input(z);
|
|
if (z->stream.avail_in > 0) {
|
|
zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
|
|
guard = Qnil; /* prevent tail call to make guard effective */
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
zstream_sync(struct zstream *z, Bytef *src, long len)
|
|
{
|
|
VALUE rest;
|
|
int err;
|
|
|
|
if (!NIL_P(z->input)) {
|
|
z->stream.next_in = (Bytef*)RSTRING_PTR(z->input);
|
|
z->stream.avail_in = MAX_UINT(RSTRING_LEN(z->input));
|
|
err = inflateSync(&z->stream);
|
|
if (err == Z_OK) {
|
|
zstream_discard_input(z,
|
|
RSTRING_LEN(z->input) - z->stream.avail_in);
|
|
zstream_append_input(z, src, len);
|
|
return Qtrue;
|
|
}
|
|
zstream_reset_input(z);
|
|
if (err != Z_DATA_ERROR) {
|
|
rest = rb_str_new((char*)z->stream.next_in, z->stream.avail_in);
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
}
|
|
|
|
if (len <= 0) return Qfalse;
|
|
|
|
z->stream.next_in = src;
|
|
z->stream.avail_in = MAX_UINT(len);
|
|
err = inflateSync(&z->stream);
|
|
if (err == Z_OK) {
|
|
zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
|
|
return Qtrue;
|
|
}
|
|
if (err != Z_DATA_ERROR) {
|
|
rest = rb_str_new((char*)z->stream.next_in, z->stream.avail_in);
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static void
|
|
zstream_mark(struct zstream *z)
|
|
{
|
|
rb_gc_mark(z->buf);
|
|
rb_gc_mark(z->input);
|
|
}
|
|
|
|
static void
|
|
zstream_finalize(struct zstream *z)
|
|
{
|
|
int err = z->func->end(&z->stream);
|
|
if (err == Z_STREAM_ERROR)
|
|
finalizer_warn("the stream state was inconsistent.");
|
|
if (err == Z_DATA_ERROR)
|
|
finalizer_warn("the stream was freed prematurely.");
|
|
}
|
|
|
|
static void
|
|
zstream_free(struct zstream *z)
|
|
{
|
|
if (ZSTREAM_IS_READY(z)) {
|
|
zstream_finalize(z);
|
|
}
|
|
xfree(z);
|
|
}
|
|
|
|
static VALUE
|
|
zstream_new(VALUE klass, const struct zstream_funcs *funcs)
|
|
{
|
|
VALUE obj;
|
|
struct zstream *z;
|
|
|
|
obj = Data_Make_Struct(klass, struct zstream,
|
|
zstream_mark, zstream_free, z);
|
|
zstream_init(z, funcs);
|
|
return obj;
|
|
}
|
|
|
|
#define zstream_deflate_new(klass) zstream_new((klass), &deflate_funcs)
|
|
#define zstream_inflate_new(klass) zstream_new((klass), &inflate_funcs)
|
|
|
|
static struct zstream *
|
|
get_zstream(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
if (!ZSTREAM_IS_READY(z)) {
|
|
rb_raise(cZError, "stream is not ready");
|
|
}
|
|
return z;
|
|
}
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::ZStream
|
|
*
|
|
* Zlib::ZStream is the abstract class for the stream which handles the
|
|
* compressed data. The operations are defined in the subclasses:
|
|
* Zlib::Deflate for compression, and Zlib::Inflate for decompression.
|
|
*
|
|
* An instance of Zlib::ZStream has one stream (struct zstream in the source)
|
|
* and two variable-length buffers which associated to the input (next_in) of
|
|
* the stream and the output (next_out) of the stream. In this document,
|
|
* "input buffer" means the buffer for input, and "output buffer" means the
|
|
* buffer for output.
|
|
*
|
|
* Data input into an instance of Zlib::ZStream are temporally stored into
|
|
* the end of input buffer, and then data in input buffer are processed from
|
|
* the beginning of the buffer until no more output from the stream is
|
|
* produced (i.e. until avail_out > 0 after processing). During processing,
|
|
* output buffer is allocated and expanded automatically to hold all output
|
|
* data.
|
|
*
|
|
* Some particular instance methods consume the data in output buffer and
|
|
* return them as a String.
|
|
*
|
|
* Here is an ascii art for describing above:
|
|
*
|
|
* +================ an instance of Zlib::ZStream ================+
|
|
* || ||
|
|
* || +--------+ +-------+ +--------+ ||
|
|
* || +--| output |<---------|zstream|<---------| input |<--+ ||
|
|
* || | | buffer | next_out+-------+next_in | buffer | | ||
|
|
* || | +--------+ +--------+ | ||
|
|
* || | | ||
|
|
* +===|======================================================|===+
|
|
* | |
|
|
* v |
|
|
* "output data" "input data"
|
|
*
|
|
* If an error occurs during processing input buffer, an exception which is a
|
|
* subclass of Zlib::Error is raised. At that time, both input and output
|
|
* buffer keep their conditions at the time when the error occurs.
|
|
*
|
|
* == Method Catalogue
|
|
*
|
|
* Many of the methods in this class are fairly low-level and unlikely to be
|
|
* of interest to users. In fact, users are unlikely to use this class
|
|
* directly; rather they will be interested in Zlib::Inflate and
|
|
* Zlib::Deflate.
|
|
*
|
|
* The higher level methods are listed below.
|
|
*
|
|
* - #total_in
|
|
* - #total_out
|
|
* - #data_type
|
|
* - #adler
|
|
* - #reset
|
|
* - #finish
|
|
* - #finished?
|
|
* - #close
|
|
* - #closed?
|
|
*/
|
|
|
|
/*
|
|
* Closes the stream. All operations on the closed stream will raise an
|
|
* exception.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_end(VALUE obj)
|
|
{
|
|
zstream_end(get_zstream(obj));
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Resets and initializes the stream. All data in both input and output buffer
|
|
* are discarded.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_reset(VALUE obj)
|
|
{
|
|
zstream_reset(get_zstream(obj));
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Finishes the stream and flushes output buffer. See Zlib::Deflate#finish and
|
|
* Zlib::Inflate#finish for details of this behavior.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_finish(VALUE obj)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE dst;
|
|
|
|
zstream_run(z, (Bytef*)"", 0, Z_FINISH);
|
|
dst = zstream_detach_buffer(z);
|
|
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Flushes input buffer and returns all data in that buffer.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_flush_next_in(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
VALUE dst;
|
|
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
dst = zstream_detach_input(z);
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Flushes output buffer and returns all data in that buffer.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_flush_next_out(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
VALUE dst;
|
|
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
dst = zstream_detach_buffer(z);
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Returns number of bytes of free spaces in output buffer. Because the free
|
|
* space is allocated automatically, this method returns 0 normally.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_avail_out(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
return rb_uint2inum(z->stream.avail_out);
|
|
}
|
|
|
|
/*
|
|
* Allocates +size+ bytes of free space in the output buffer. If there are more
|
|
* than +size+ bytes already in the buffer, the buffer is truncated. Because
|
|
* free space is allocated automatically, you usually don't need to use this
|
|
* method.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_set_avail_out(VALUE obj, VALUE size)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
|
|
Check_Type(size, T_FIXNUM);
|
|
zstream_expand_buffer_into(z, FIX2INT(size));
|
|
return size;
|
|
}
|
|
|
|
/*
|
|
* Returns bytes of data in the input buffer. Normally, returns 0.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_avail_in(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
return INT2FIX(NIL_P(z->input) ? 0 : (int)(RSTRING_LEN(z->input)));
|
|
}
|
|
|
|
/*
|
|
* Returns the total bytes of the input data to the stream. FIXME
|
|
*/
|
|
static VALUE
|
|
rb_zstream_total_in(VALUE obj)
|
|
{
|
|
return rb_uint2inum(get_zstream(obj)->stream.total_in);
|
|
}
|
|
|
|
/*
|
|
* Returns the total bytes of the output data from the stream. FIXME
|
|
*/
|
|
static VALUE
|
|
rb_zstream_total_out(VALUE obj)
|
|
{
|
|
return rb_uint2inum(get_zstream(obj)->stream.total_out);
|
|
}
|
|
|
|
/*
|
|
* Guesses the type of the data which have been inputed into the stream. The
|
|
* returned value is either <tt>BINARY</tt>, <tt>ASCII</tt>, or
|
|
* <tt>UNKNOWN</tt>.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_data_type(VALUE obj)
|
|
{
|
|
return INT2FIX(get_zstream(obj)->stream.data_type);
|
|
}
|
|
|
|
/*
|
|
* Returns the adler-32 checksum.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_adler(VALUE obj)
|
|
{
|
|
return rb_uint2inum(get_zstream(obj)->stream.adler);
|
|
}
|
|
|
|
/*
|
|
* Returns true if the stream is finished.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_finished_p(VALUE obj)
|
|
{
|
|
return ZSTREAM_IS_FINISHED(get_zstream(obj)) ? Qtrue : Qfalse;
|
|
}
|
|
|
|
/*
|
|
* Returns true if the stream is closed.
|
|
*/
|
|
static VALUE
|
|
rb_zstream_closed_p(VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
return ZSTREAM_IS_READY(z) ? Qfalse : Qtrue;
|
|
}
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::Deflate
|
|
*
|
|
* Zlib::Deflate is the class for compressing data. See Zlib::ZStream for more
|
|
* information.
|
|
*/
|
|
|
|
#define FIXNUMARG(val, ifnil) \
|
|
(NIL_P((val)) ? (ifnil) \
|
|
: ((void)Check_Type((val), T_FIXNUM), FIX2INT((val))))
|
|
|
|
#define ARG_LEVEL(val) FIXNUMARG((val), Z_DEFAULT_COMPRESSION)
|
|
#define ARG_WBITS(val) FIXNUMARG((val), MAX_WBITS)
|
|
#define ARG_MEMLEVEL(val) FIXNUMARG((val), DEF_MEM_LEVEL)
|
|
#define ARG_STRATEGY(val) FIXNUMARG((val), Z_DEFAULT_STRATEGY)
|
|
#define ARG_FLUSH(val) FIXNUMARG((val), Z_NO_FLUSH)
|
|
|
|
|
|
static VALUE
|
|
rb_deflate_s_allocate(VALUE klass)
|
|
{
|
|
return zstream_deflate_new(klass);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate.new
|
|
*
|
|
* call-seq: Zlib::Deflate.new(level=nil, windowBits=nil, memlevel=nil, strategy=nil)
|
|
*
|
|
* == Arguments
|
|
*
|
|
* +level+::
|
|
* An Integer compression level between
|
|
* BEST_SPEED and BEST_COMPRESSION
|
|
* +windowBits+::
|
|
* An Integer for the windowBits size. Should be
|
|
* in the range 8..15, larger values of this parameter
|
|
* result in better at the expense of memory usage.
|
|
* +memlevel+::
|
|
* Specifies how much memory should be allocated for
|
|
* the internal compression state.
|
|
* Between DEF_MEM_LEVEL and MAX_MEM_LEVEL
|
|
* +strategy+::
|
|
* A parameter to tune the compression algorithm. Use the
|
|
* DEFAULT_STRATEGY for normal data, FILTERED for data produced by a
|
|
* filter (or predictor), HUFFMAN_ONLY to force Huffman encoding only (no
|
|
* string match).
|
|
*
|
|
* == Description
|
|
*
|
|
* Creates a new deflate stream for compression. See zlib.h for details of
|
|
* each argument. If an argument is nil, the default value of that argument is
|
|
* used.
|
|
*
|
|
*
|
|
* == examples
|
|
*
|
|
* === basic
|
|
*
|
|
* f = File.new("compressed.file","w+")
|
|
* #=> #<File:compressed.file>
|
|
* f << Zlib::Deflate.new().deflate(File.read("big.file"))
|
|
* #=> #<File:compressed.file>
|
|
* f.close
|
|
* #=> nil
|
|
*
|
|
* === a little more robust
|
|
*
|
|
* compressed_file = File.open("compressed.file", "w+")
|
|
* #=> #<File:compressed.file>
|
|
* zd = Zlib::Deflate.new(Zlib::BEST_COMPRESSION, 15, Zlib::MAX_MEM_LEVEL, Zlib::HUFFMAN_ONLY)
|
|
* #=> #<Zlib::Deflate:0x000000008610a0>
|
|
* compressed_file << zd.deflate(File.read("big.file"))
|
|
* #=> "\xD4z\xC6\xDE\b\xA1K\x1Ej\x8A ..."
|
|
* compressed_file.close
|
|
* #=> nil
|
|
* zd.close
|
|
* #=> nil
|
|
*
|
|
* (while this example will work, for best optimization the flags need to be reviewed for your specific function)
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_initialize(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
VALUE level, wbits, memlevel, strategy;
|
|
int err;
|
|
|
|
rb_scan_args(argc, argv, "04", &level, &wbits, &memlevel, &strategy);
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
|
|
err = deflateInit2(&z->stream, ARG_LEVEL(level), Z_DEFLATED,
|
|
ARG_WBITS(wbits), ARG_MEMLEVEL(memlevel),
|
|
ARG_STRATEGY(strategy));
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
ZSTREAM_READY(z);
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate#initialize_copy
|
|
*
|
|
* Duplicates the deflate stream.
|
|
*/
|
|
static VALUE
|
|
rb_deflate_init_copy(VALUE self, VALUE orig)
|
|
{
|
|
struct zstream *z1, *z2;
|
|
int err;
|
|
|
|
Data_Get_Struct(self, struct zstream, z1);
|
|
z2 = get_zstream(orig);
|
|
|
|
err = deflateCopy(&z1->stream, &z2->stream);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, 0);
|
|
}
|
|
z1->input = NIL_P(z2->input) ? Qnil : rb_str_dup(z2->input);
|
|
z1->buf = NIL_P(z2->buf) ? Qnil : rb_str_dup(z2->buf);
|
|
z1->buf_filled = z2->buf_filled;
|
|
z1->flags = z2->flags;
|
|
|
|
return self;
|
|
}
|
|
|
|
static VALUE
|
|
deflate_run(VALUE args)
|
|
{
|
|
struct zstream *z = (struct zstream*)((VALUE*)args)[0];
|
|
VALUE src = ((VALUE*)args)[1];
|
|
|
|
zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_FINISH);
|
|
return zstream_detach_buffer(z);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate.deflate
|
|
*
|
|
* call-seq: Zlib.deflate(string[, level])
|
|
* Zlib::Deflate.deflate(string[, level])
|
|
*
|
|
* Compresses the given +string+. Valid values of level are
|
|
* <tt>NO_COMPRESSION</tt>, <tt>BEST_SPEED</tt>,
|
|
* <tt>BEST_COMPRESSION</tt>, <tt>DEFAULT_COMPRESSION</tt>, and an
|
|
* integer from 0 to 9 (the default is 6).
|
|
*
|
|
* This method is almost equivalent to the following code:
|
|
*
|
|
* def deflate(string, level)
|
|
* z = Zlib::Deflate.new(level)
|
|
* dst = z.deflate(string, Zlib::NO_FLUSH)
|
|
* z.close
|
|
* dst
|
|
* end
|
|
*
|
|
* See also Zlib.inflate
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_s_deflate(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
struct zstream z;
|
|
VALUE src, level, dst, args[2];
|
|
int err, lev;
|
|
|
|
rb_scan_args(argc, argv, "11", &src, &level);
|
|
|
|
lev = ARG_LEVEL(level);
|
|
StringValue(src);
|
|
zstream_init_deflate(&z);
|
|
err = deflateInit(&z.stream, lev);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z.stream.msg);
|
|
}
|
|
ZSTREAM_READY(&z);
|
|
|
|
args[0] = (VALUE)&z;
|
|
args[1] = src;
|
|
dst = rb_ensure(deflate_run, (VALUE)args, zstream_end, (VALUE)&z);
|
|
|
|
OBJ_INFECT(dst, src);
|
|
return dst;
|
|
}
|
|
|
|
static void
|
|
do_deflate(struct zstream *z, VALUE src, int flush)
|
|
{
|
|
if (NIL_P(src)) {
|
|
zstream_run(z, (Bytef*)"", 0, Z_FINISH);
|
|
return;
|
|
}
|
|
StringValue(src);
|
|
if (flush != Z_NO_FLUSH || RSTRING_LEN(src) > 0) { /* prevent BUF_ERROR */
|
|
zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), flush);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib.deflate
|
|
*
|
|
* call-seq: deflate(string[, flush])
|
|
*
|
|
* == Arguments
|
|
*
|
|
* +string+::
|
|
* String
|
|
*
|
|
* +flush+::
|
|
* Integer representing a flush code. Either NO_FLUSH,
|
|
* SYNC_FLUSH, FULL_FLUSH, or FINISH. See zlib.h for details.
|
|
* Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
|
|
* decide how much data to accumulate before producing output, in order to
|
|
* maximize compression.
|
|
*
|
|
* == Description
|
|
*
|
|
* Inputs +string+ into the deflate stream and returns the output from the
|
|
* stream. On calling this method, both the input and the output buffers of
|
|
* the stream are flushed.
|
|
*
|
|
* If +string+ is nil, this method finishes the
|
|
* stream, just like Zlib::ZStream#finish.
|
|
*
|
|
* == Usage
|
|
*
|
|
* comp = Zlib.deflate(File.read("big.file"))
|
|
* or
|
|
* comp = Zlib.deflate(File.read("big.file"), Zlib::FULL_FLUSH)
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_deflate(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE src, flush, dst;
|
|
|
|
rb_scan_args(argc, argv, "11", &src, &flush);
|
|
OBJ_INFECT(obj, src);
|
|
do_deflate(z, src, ARG_FLUSH(flush));
|
|
dst = zstream_detach_buffer(z);
|
|
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate.<<
|
|
*
|
|
* call-seq: << string
|
|
*
|
|
* Inputs +string+ into the deflate stream just like Zlib::Deflate#deflate, but
|
|
* returns the Zlib::Deflate object itself. The output from the stream is
|
|
* preserved in output buffer.
|
|
*/
|
|
static VALUE
|
|
rb_deflate_addstr(VALUE obj, VALUE src)
|
|
{
|
|
OBJ_INFECT(obj, src);
|
|
do_deflate(get_zstream(obj), src, Z_NO_FLUSH);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate#flush
|
|
*
|
|
* call-seq: flush(flush)
|
|
*
|
|
* This method is equivalent to <tt>deflate('', flush)</tt>. If flush is omitted,
|
|
* <tt>SYNC_FLUSH</tt> is used as flush. This method is just provided
|
|
* to improve the readability of your Ruby program.
|
|
*
|
|
* Please visit your zlib.h for a deeper detail on NO_FLUSH, SYNC_FLUSH, FULL_FLUSH, and FINISH
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_flush(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE v_flush, dst;
|
|
int flush;
|
|
|
|
rb_scan_args(argc, argv, "01", &v_flush);
|
|
flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
|
|
if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
|
|
zstream_run(z, (Bytef*)"", 0, flush);
|
|
}
|
|
dst = zstream_detach_buffer(z);
|
|
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate.params
|
|
*
|
|
* call-seq: params(level, strategy)
|
|
*
|
|
* Changes the parameters of the deflate stream. See zlib.h for details. The
|
|
* output from the stream by changing the params is preserved in output
|
|
* buffer.
|
|
*
|
|
* +level+::
|
|
* An Integer compression level between
|
|
* BEST_SPEED and BEST_COMPRESSION
|
|
* +strategy+::
|
|
* A parameter to tune the compression algorithm. Use the
|
|
* DEFAULT_STRATEGY for normal data, FILTERED for data produced by a
|
|
* filter (or predictor), HUFFMAN_ONLY to force Huffman encoding only (no
|
|
* string match).
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_params(VALUE obj, VALUE v_level, VALUE v_strategy)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
int level, strategy;
|
|
int err;
|
|
uInt n;
|
|
|
|
level = ARG_LEVEL(v_level);
|
|
strategy = ARG_STRATEGY(v_strategy);
|
|
|
|
n = z->stream.avail_out;
|
|
err = deflateParams(&z->stream, level, strategy);
|
|
z->buf_filled += n - z->stream.avail_out;
|
|
while (err == Z_BUF_ERROR) {
|
|
rb_warning("deflateParams() returned Z_BUF_ERROR");
|
|
zstream_expand_buffer(z);
|
|
n = z->stream.avail_out;
|
|
err = deflateParams(&z->stream, level, strategy);
|
|
z->buf_filled += n - z->stream.avail_out;
|
|
}
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Deflate.set_dictionary
|
|
*
|
|
* call-seq: set_dictionary(string)
|
|
*
|
|
* Sets the preset dictionary and returns +string+. This method is available
|
|
* just only after Zlib::Deflate.new or Zlib::ZStream#reset method was called.
|
|
* See zlib.h for details.
|
|
*
|
|
* Can raise errors of Z_STREAM_ERROR if a parameter is invalid (such as
|
|
* NULL dictionary) or the stream state is inconsistent, Z_DATA_ERROR if
|
|
* the given dictionary doesn't match the expected one (incorrect adler32 value)
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_deflate_set_dictionary(VALUE obj, VALUE dic)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE src = dic;
|
|
int err;
|
|
|
|
OBJ_INFECT(obj, dic);
|
|
StringValue(src);
|
|
err = deflateSetDictionary(&z->stream,
|
|
(Bytef*)RSTRING_PTR(src), RSTRING_LENINT(src));
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
|
|
return dic;
|
|
}
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::Inflate
|
|
*
|
|
* Zlib:Inflate is the class for decompressing compressed data. Unlike
|
|
* Zlib::Deflate, an instance of this class is not able to duplicate (clone,
|
|
* dup) itself.
|
|
*/
|
|
|
|
|
|
|
|
static VALUE
|
|
rb_inflate_s_allocate(VALUE klass)
|
|
{
|
|
return zstream_inflate_new(klass);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Inflate.new
|
|
*
|
|
* call-seq: Zlib::Inflate.new(window_bits)
|
|
*
|
|
* == Arguments
|
|
*
|
|
* +windowBits+::
|
|
* An Integer for the windowBits size. Should be
|
|
* in the range 8..15, larger values of this parameter
|
|
* result in better at the expense of memory usage.
|
|
*
|
|
* == Description
|
|
*
|
|
* Creates a new inflate stream for decompression. See zlib.h for details
|
|
* of the argument. If +window_bits+ is +nil+, the default value is used.
|
|
*
|
|
* == Example
|
|
*
|
|
* cf = File.open("compressed.file")
|
|
* ucf = File.open("uncompressed.file", "w+")
|
|
* zi = Zlib::Inflate.new(Zlib::MAX_WBITS)
|
|
*
|
|
* ucf << zi.inflate(cf.read)
|
|
*
|
|
* ucf.close
|
|
* zi.close
|
|
* cf.close
|
|
*
|
|
* or
|
|
*
|
|
* File.open("compressed.file") {|cf|
|
|
* zi = Zlib::Inflate.new
|
|
* File.open("uncompressed.file", "w+") {|ucf|
|
|
* ucf << zi.inflate(cf.read)
|
|
* }
|
|
* zi.close
|
|
* }
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_inflate_initialize(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct zstream *z;
|
|
VALUE wbits;
|
|
int err;
|
|
|
|
rb_scan_args(argc, argv, "01", &wbits);
|
|
Data_Get_Struct(obj, struct zstream, z);
|
|
|
|
err = inflateInit2(&z->stream, ARG_WBITS(wbits));
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
ZSTREAM_READY(z);
|
|
|
|
return obj;
|
|
}
|
|
|
|
static VALUE
|
|
inflate_run(VALUE args)
|
|
{
|
|
struct zstream *z = (struct zstream*)((VALUE*)args)[0];
|
|
VALUE src = ((VALUE*)args)[1];
|
|
|
|
zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_SYNC_FLUSH);
|
|
zstream_run(z, (Bytef*)"", 0, Z_FINISH); /* for checking errors */
|
|
return zstream_detach_buffer(z);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Inflate.inflate
|
|
*
|
|
* call-seq: Zlib::Inflate.inflate(string)
|
|
*
|
|
* Decompresses +string+. Raises a Zlib::NeedDict exception if a preset
|
|
* dictionary is needed for decompression.
|
|
*
|
|
* This method is almost equivalent to the following code:
|
|
*
|
|
* def inflate(string)
|
|
* zstream = Zlib::Inflate.new
|
|
* buf = zstream.inflate(string)
|
|
* zstream.finish
|
|
* zstream.close
|
|
* buf
|
|
* end
|
|
*
|
|
* See also Zlib.deflate
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_inflate_s_inflate(VALUE obj, VALUE src)
|
|
{
|
|
struct zstream z;
|
|
VALUE dst, args[2];
|
|
int err;
|
|
|
|
StringValue(src);
|
|
zstream_init_inflate(&z);
|
|
err = inflateInit(&z.stream);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z.stream.msg);
|
|
}
|
|
ZSTREAM_READY(&z);
|
|
|
|
args[0] = (VALUE)&z;
|
|
args[1] = src;
|
|
dst = rb_ensure(inflate_run, (VALUE)args, zstream_end, (VALUE)&z);
|
|
|
|
OBJ_INFECT(dst, src);
|
|
return dst;
|
|
}
|
|
|
|
static void
|
|
do_inflate(struct zstream *z, VALUE src)
|
|
{
|
|
if (NIL_P(src)) {
|
|
zstream_run(z, (Bytef*)"", 0, Z_FINISH);
|
|
return;
|
|
}
|
|
StringValue(src);
|
|
if (RSTRING_LEN(src) > 0) { /* prevent Z_BUF_ERROR */
|
|
zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_SYNC_FLUSH);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Inflate#inflate
|
|
*
|
|
* call-seq: inflate(string)
|
|
*
|
|
* Inputs +string+ into the inflate stream and returns the output from the
|
|
* stream. Calling this method, both the input and the output buffer of the
|
|
* stream are flushed. If string is +nil+, this method finishes the stream,
|
|
* just like Zlib::ZStream#finish.
|
|
*
|
|
* Raises a Zlib::NeedDict exception if a preset dictionary is needed to
|
|
* decompress. Set the dictionary by Zlib::Inflate#set_dictionary and then
|
|
* call this method again with an empty string. (<i>???</i>)
|
|
*
|
|
* See also Zlib::Inflate.new
|
|
*/
|
|
static VALUE
|
|
rb_inflate_inflate(VALUE obj, VALUE src)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE dst;
|
|
|
|
OBJ_INFECT(obj, src);
|
|
|
|
if (ZSTREAM_IS_FINISHED(z)) {
|
|
if (NIL_P(src)) {
|
|
dst = zstream_detach_buffer(z);
|
|
}
|
|
else {
|
|
StringValue(src);
|
|
zstream_append_buffer2(z, src);
|
|
dst = rb_str_new(0, 0);
|
|
}
|
|
}
|
|
else {
|
|
do_inflate(z, src);
|
|
dst = zstream_detach_buffer(z);
|
|
if (ZSTREAM_IS_FINISHED(z)) {
|
|
zstream_passthrough_input(z);
|
|
}
|
|
}
|
|
|
|
OBJ_INFECT(dst, obj);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* call-seq: << string
|
|
*
|
|
* Inputs +string+ into the inflate stream just like Zlib::Inflate#inflate, but
|
|
* returns the Zlib::Inflate object itself. The output from the stream is
|
|
* preserved in output buffer.
|
|
*/
|
|
static VALUE
|
|
rb_inflate_addstr(VALUE obj, VALUE src)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
|
|
OBJ_INFECT(obj, src);
|
|
|
|
if (ZSTREAM_IS_FINISHED(z)) {
|
|
if (!NIL_P(src)) {
|
|
StringValue(src);
|
|
zstream_append_buffer2(z, src);
|
|
}
|
|
}
|
|
else {
|
|
do_inflate(z, src);
|
|
if (ZSTREAM_IS_FINISHED(z)) {
|
|
zstream_passthrough_input(z);
|
|
}
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq: sync(string)
|
|
*
|
|
* Inputs +string+ into the end of input buffer and skips data until a full
|
|
* flush point can be found. If the point is found in the buffer, this method
|
|
* flushes the buffer and returns false. Otherwise it returns +true+ and the
|
|
* following data of full flush point is preserved in the buffer.
|
|
*/
|
|
static VALUE
|
|
rb_inflate_sync(VALUE obj, VALUE src)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
|
|
OBJ_INFECT(obj, src);
|
|
StringValue(src);
|
|
return zstream_sync(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src));
|
|
}
|
|
|
|
/*
|
|
* Quoted verbatim from original documentation:
|
|
*
|
|
* What is this?
|
|
*
|
|
* <tt>:)</tt>
|
|
*/
|
|
static VALUE
|
|
rb_inflate_sync_point_p(VALUE obj)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
int err;
|
|
|
|
err = inflateSyncPoint(&z->stream);
|
|
if (err == 1) {
|
|
return Qtrue;
|
|
}
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::Inflate#set_dictionary
|
|
*
|
|
* Sets the preset dictionary and returns +string+. This method is available just
|
|
* only after a Zlib::NeedDict exception was raised. See zlib.h for details.
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_inflate_set_dictionary(VALUE obj, VALUE dic)
|
|
{
|
|
struct zstream *z = get_zstream(obj);
|
|
VALUE src = dic;
|
|
int err;
|
|
|
|
OBJ_INFECT(obj, dic);
|
|
StringValue(src);
|
|
err = inflateSetDictionary(&z->stream,
|
|
(Bytef*)RSTRING_PTR(src), RSTRING_LENINT(src));
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, z->stream.msg);
|
|
}
|
|
|
|
return dic;
|
|
}
|
|
|
|
|
|
|
|
#if GZIP_SUPPORT
|
|
|
|
/* NOTE: Features for gzip files of Ruby/zlib are written from scratch
|
|
* and using undocumented feature of zlib, negative wbits.
|
|
* I don't think gzFile APIs of zlib are good for Ruby.
|
|
*/
|
|
|
|
/*------- .gz file header --------*/
|
|
|
|
#define GZ_MAGIC1 0x1f
|
|
#define GZ_MAGIC2 0x8b
|
|
#define GZ_METHOD_DEFLATE 8
|
|
#define GZ_FLAG_MULTIPART 0x2
|
|
#define GZ_FLAG_EXTRA 0x4
|
|
#define GZ_FLAG_ORIG_NAME 0x8
|
|
#define GZ_FLAG_COMMENT 0x10
|
|
#define GZ_FLAG_ENCRYPT 0x20
|
|
#define GZ_FLAG_UNKNOWN_MASK 0xc0
|
|
|
|
#define GZ_EXTRAFLAG_FAST 0x4
|
|
#define GZ_EXTRAFLAG_SLOW 0x2
|
|
|
|
/* from zutil.h */
|
|
#define OS_MSDOS 0x00
|
|
#define OS_AMIGA 0x01
|
|
#define OS_VMS 0x02
|
|
#define OS_UNIX 0x03
|
|
#define OS_ATARI 0x05
|
|
#define OS_OS2 0x06
|
|
#define OS_MACOS 0x07
|
|
#define OS_TOPS20 0x0a
|
|
#define OS_WIN32 0x0b
|
|
|
|
#define OS_VMCMS 0x04
|
|
#define OS_ZSYSTEM 0x08
|
|
#define OS_CPM 0x09
|
|
#define OS_QDOS 0x0c
|
|
#define OS_RISCOS 0x0d
|
|
#define OS_UNKNOWN 0xff
|
|
|
|
#ifndef OS_CODE
|
|
#define OS_CODE OS_UNIX
|
|
#endif
|
|
|
|
static ID id_write, id_read, id_readpartial, id_flush, id_seek, id_close, id_path, id_input;
|
|
static VALUE cGzError, cNoFooter, cCRCError, cLengthError;
|
|
|
|
|
|
|
|
/*-------- gzfile internal APIs --------*/
|
|
|
|
struct gzfile {
|
|
struct zstream z;
|
|
VALUE io;
|
|
int level;
|
|
time_t mtime; /* for header */
|
|
int os_code; /* for header */
|
|
VALUE orig_name; /* for header; must be a String */
|
|
VALUE comment; /* for header; must be a String */
|
|
unsigned long crc;
|
|
int lineno;
|
|
long ungetc;
|
|
void (*end)(struct gzfile *);
|
|
rb_encoding *enc;
|
|
rb_encoding *enc2;
|
|
rb_econv_t *ec;
|
|
int ecflags;
|
|
VALUE ecopts;
|
|
char *cbuf;
|
|
VALUE path;
|
|
};
|
|
#define GZFILE_CBUF_CAPA 10
|
|
|
|
#define GZFILE_FLAG_SYNC ZSTREAM_FLAG_UNUSED
|
|
#define GZFILE_FLAG_HEADER_FINISHED (ZSTREAM_FLAG_UNUSED << 1)
|
|
#define GZFILE_FLAG_FOOTER_FINISHED (ZSTREAM_FLAG_UNUSED << 2)
|
|
|
|
#define GZFILE_IS_FINISHED(gz) \
|
|
(ZSTREAM_IS_FINISHED(&(gz)->z) && (gz)->z.buf_filled == 0)
|
|
|
|
#define GZFILE_READ_SIZE 2048
|
|
|
|
|
|
static void
|
|
gzfile_mark(struct gzfile *gz)
|
|
{
|
|
rb_gc_mark(gz->io);
|
|
rb_gc_mark(gz->orig_name);
|
|
rb_gc_mark(gz->comment);
|
|
zstream_mark(&gz->z);
|
|
rb_gc_mark(gz->ecopts);
|
|
rb_gc_mark(gz->path);
|
|
}
|
|
|
|
static void
|
|
gzfile_free(struct gzfile *gz)
|
|
{
|
|
struct zstream *z = &gz->z;
|
|
|
|
if (ZSTREAM_IS_READY(z)) {
|
|
if (z->func == &deflate_funcs) {
|
|
finalizer_warn("Zlib::GzipWriter object must be closed explicitly.");
|
|
}
|
|
zstream_finalize(z);
|
|
}
|
|
if (gz->cbuf) {
|
|
xfree(gz->cbuf);
|
|
}
|
|
xfree(gz);
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_new(klass, funcs, endfunc)
|
|
VALUE klass;
|
|
const struct zstream_funcs *funcs;
|
|
void (*endfunc)(struct gzfile *);
|
|
{
|
|
VALUE obj;
|
|
struct gzfile *gz;
|
|
|
|
obj = Data_Make_Struct(klass, struct gzfile, gzfile_mark, gzfile_free, gz);
|
|
zstream_init(&gz->z, funcs);
|
|
gz->io = Qnil;
|
|
gz->level = 0;
|
|
gz->mtime = 0;
|
|
gz->os_code = OS_CODE;
|
|
gz->orig_name = Qnil;
|
|
gz->comment = Qnil;
|
|
gz->crc = crc32(0, Z_NULL, 0);
|
|
gz->lineno = 0;
|
|
gz->ungetc = 0;
|
|
gz->end = endfunc;
|
|
gz->enc = rb_default_external_encoding();
|
|
gz->enc2 = 0;
|
|
gz->ec = NULL;
|
|
gz->ecflags = 0;
|
|
gz->ecopts = Qnil;
|
|
gz->cbuf = 0;
|
|
gz->path = Qnil;
|
|
|
|
return obj;
|
|
}
|
|
|
|
#define gzfile_writer_new(gz) gzfile_new((gz),&deflate_funcs,gzfile_writer_end)
|
|
#define gzfile_reader_new(gz) gzfile_new((gz),&inflate_funcs,gzfile_reader_end)
|
|
|
|
static void
|
|
gzfile_reset(struct gzfile *gz)
|
|
{
|
|
zstream_reset(&gz->z);
|
|
gz->crc = crc32(0, Z_NULL, 0);
|
|
gz->lineno = 0;
|
|
gz->ungetc = 0;
|
|
if (gz->ec) {
|
|
rb_econv_close(gz->ec);
|
|
gz->ec = rb_econv_open_opts(gz->enc2->name, gz->enc->name,
|
|
gz->ecflags, gz->ecopts);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gzfile_close(struct gzfile *gz, int closeflag)
|
|
{
|
|
VALUE io = gz->io;
|
|
|
|
gz->end(gz);
|
|
gz->io = Qnil;
|
|
gz->orig_name = Qnil;
|
|
gz->comment = Qnil;
|
|
if (closeflag && rb_respond_to(io, id_close)) {
|
|
rb_funcall(io, id_close, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gzfile_write_raw(struct gzfile *gz)
|
|
{
|
|
VALUE str;
|
|
|
|
if (gz->z.buf_filled > 0) {
|
|
str = zstream_detach_buffer(&gz->z);
|
|
OBJ_TAINT(str); /* for safe */
|
|
rb_funcall(gz->io, id_write, 1, str);
|
|
if ((gz->z.flags & GZFILE_FLAG_SYNC)
|
|
&& rb_respond_to(gz->io, id_flush))
|
|
rb_funcall(gz->io, id_flush, 0);
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_read_raw_partial(VALUE arg)
|
|
{
|
|
struct gzfile *gz = (struct gzfile*)arg;
|
|
VALUE str;
|
|
|
|
str = rb_funcall(gz->io, id_readpartial, 1, INT2FIX(GZFILE_READ_SIZE));
|
|
Check_Type(str, T_STRING);
|
|
return str;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_read_raw_rescue(VALUE arg)
|
|
{
|
|
struct gzfile *gz = (struct gzfile*)arg;
|
|
VALUE str = Qnil;
|
|
if (rb_obj_is_kind_of(rb_errinfo(), rb_eNoMethodError)) {
|
|
str = rb_funcall(gz->io, id_read, 1, INT2FIX(GZFILE_READ_SIZE));
|
|
if (!NIL_P(str)) {
|
|
Check_Type(str, T_STRING);
|
|
}
|
|
}
|
|
return str; /* return nil when EOFError */
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_read_raw(struct gzfile *gz)
|
|
{
|
|
return rb_rescue2(gzfile_read_raw_partial, (VALUE)gz,
|
|
gzfile_read_raw_rescue, (VALUE)gz,
|
|
rb_eEOFError, rb_eNoMethodError, (VALUE)0);
|
|
}
|
|
|
|
static int
|
|
gzfile_read_raw_ensure(struct gzfile *gz, long size)
|
|
{
|
|
VALUE str;
|
|
|
|
while (NIL_P(gz->z.input) || RSTRING_LEN(gz->z.input) < size) {
|
|
str = gzfile_read_raw(gz);
|
|
if (NIL_P(str)) return 0;
|
|
zstream_append_input2(&gz->z, str);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static char *
|
|
gzfile_read_raw_until_zero(struct gzfile *gz, long offset)
|
|
{
|
|
VALUE str;
|
|
char *p;
|
|
|
|
for (;;) {
|
|
p = memchr(RSTRING_PTR(gz->z.input) + offset, '\0',
|
|
RSTRING_LEN(gz->z.input) - offset);
|
|
if (p) break;
|
|
str = gzfile_read_raw(gz);
|
|
if (NIL_P(str)) {
|
|
rb_raise(cGzError, "unexpected end of file");
|
|
}
|
|
offset = RSTRING_LEN(gz->z.input);
|
|
zstream_append_input2(&gz->z, str);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static unsigned int
|
|
gzfile_get16(const unsigned char *src)
|
|
{
|
|
unsigned int n;
|
|
n = *(src++) & 0xff;
|
|
n |= (*(src++) & 0xff) << 8;
|
|
return n;
|
|
}
|
|
|
|
static unsigned long
|
|
gzfile_get32(const unsigned char *src)
|
|
{
|
|
unsigned long n;
|
|
n = *(src++) & 0xff;
|
|
n |= (*(src++) & 0xff) << 8;
|
|
n |= (*(src++) & 0xff) << 16;
|
|
n |= (*(src++) & 0xffU) << 24;
|
|
return n;
|
|
}
|
|
|
|
static void
|
|
gzfile_set32(unsigned long n, unsigned char *dst)
|
|
{
|
|
*(dst++) = n & 0xff;
|
|
*(dst++) = (n >> 8) & 0xff;
|
|
*(dst++) = (n >> 16) & 0xff;
|
|
*dst = (n >> 24) & 0xff;
|
|
}
|
|
|
|
static void
|
|
gzfile_raise(struct gzfile *gz, VALUE klass, const char *message)
|
|
{
|
|
VALUE exc = rb_exc_new2(klass, message);
|
|
if (!NIL_P(gz->z.input)) {
|
|
rb_ivar_set(exc, id_input, rb_str_resurrect(gz->z.input));
|
|
}
|
|
rb_exc_raise(exc);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile::Error#inspect
|
|
*
|
|
* Constructs a String of the GzipFile Error
|
|
*/
|
|
static VALUE
|
|
gzfile_error_inspect(VALUE error)
|
|
{
|
|
VALUE str = rb_call_super(0, 0);
|
|
VALUE input = rb_attr_get(error, id_input);
|
|
|
|
if (!NIL_P(input)) {
|
|
rb_str_resize(str, RSTRING_LEN(str)-1);
|
|
rb_str_cat2(str, ", input=");
|
|
rb_str_append(str, rb_str_inspect(input));
|
|
rb_str_cat2(str, ">");
|
|
}
|
|
return str;
|
|
}
|
|
|
|
static void
|
|
gzfile_make_header(struct gzfile *gz)
|
|
{
|
|
Bytef buf[10]; /* the size of gzip header */
|
|
unsigned char flags = 0, extraflags = 0;
|
|
|
|
if (!NIL_P(gz->orig_name)) {
|
|
flags |= GZ_FLAG_ORIG_NAME;
|
|
}
|
|
if (!NIL_P(gz->comment)) {
|
|
flags |= GZ_FLAG_COMMENT;
|
|
}
|
|
if (gz->mtime == 0) {
|
|
gz->mtime = time(0);
|
|
}
|
|
|
|
if (gz->level == Z_BEST_SPEED) {
|
|
extraflags |= GZ_EXTRAFLAG_FAST;
|
|
}
|
|
else if (gz->level == Z_BEST_COMPRESSION) {
|
|
extraflags |= GZ_EXTRAFLAG_SLOW;
|
|
}
|
|
|
|
buf[0] = GZ_MAGIC1;
|
|
buf[1] = GZ_MAGIC2;
|
|
buf[2] = GZ_METHOD_DEFLATE;
|
|
buf[3] = flags;
|
|
gzfile_set32((unsigned long)gz->mtime, &buf[4]);
|
|
buf[8] = extraflags;
|
|
buf[9] = gz->os_code;
|
|
zstream_append_buffer(&gz->z, buf, sizeof(buf));
|
|
|
|
if (!NIL_P(gz->orig_name)) {
|
|
zstream_append_buffer2(&gz->z, gz->orig_name);
|
|
zstream_append_buffer(&gz->z, (Bytef*)"\0", 1);
|
|
}
|
|
if (!NIL_P(gz->comment)) {
|
|
zstream_append_buffer2(&gz->z, gz->comment);
|
|
zstream_append_buffer(&gz->z, (Bytef*)"\0", 1);
|
|
}
|
|
|
|
gz->z.flags |= GZFILE_FLAG_HEADER_FINISHED;
|
|
}
|
|
|
|
static void
|
|
gzfile_make_footer(struct gzfile *gz)
|
|
{
|
|
Bytef buf[8]; /* 8 is the size of gzip footer */
|
|
|
|
gzfile_set32(gz->crc, buf);
|
|
gzfile_set32(gz->z.stream.total_in, &buf[4]);
|
|
zstream_append_buffer(&gz->z, buf, sizeof(buf));
|
|
gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
|
|
}
|
|
|
|
static void
|
|
gzfile_read_header(struct gzfile *gz)
|
|
{
|
|
const unsigned char *head;
|
|
long len;
|
|
char flags, *p;
|
|
|
|
if (!gzfile_read_raw_ensure(gz, 10)) { /* 10 is the size of gzip header */
|
|
gzfile_raise(gz, cGzError, "not in gzip format");
|
|
}
|
|
|
|
head = (unsigned char*)RSTRING_PTR(gz->z.input);
|
|
|
|
if (head[0] != GZ_MAGIC1 || head[1] != GZ_MAGIC2) {
|
|
gzfile_raise(gz, cGzError, "not in gzip format");
|
|
}
|
|
if (head[2] != GZ_METHOD_DEFLATE) {
|
|
rb_raise(cGzError, "unsupported compression method %d", head[2]);
|
|
}
|
|
|
|
flags = head[3];
|
|
if (flags & GZ_FLAG_MULTIPART) {
|
|
rb_raise(cGzError, "multi-part gzip file is not supported");
|
|
}
|
|
else if (flags & GZ_FLAG_ENCRYPT) {
|
|
rb_raise(cGzError, "encrypted gzip file is not supported");
|
|
}
|
|
else if (flags & GZ_FLAG_UNKNOWN_MASK) {
|
|
rb_raise(cGzError, "unknown flags 0x%02x", flags);
|
|
}
|
|
|
|
if (head[8] & GZ_EXTRAFLAG_FAST) {
|
|
gz->level = Z_BEST_SPEED;
|
|
}
|
|
else if (head[8] & GZ_EXTRAFLAG_SLOW) {
|
|
gz->level = Z_BEST_COMPRESSION;
|
|
}
|
|
else {
|
|
gz->level = Z_DEFAULT_COMPRESSION;
|
|
}
|
|
|
|
gz->mtime = gzfile_get32(&head[4]);
|
|
gz->os_code = head[9];
|
|
zstream_discard_input(&gz->z, 10);
|
|
|
|
if (flags & GZ_FLAG_EXTRA) {
|
|
if (!gzfile_read_raw_ensure(gz, 2)) {
|
|
rb_raise(cGzError, "unexpected end of file");
|
|
}
|
|
len = gzfile_get16((Bytef*)RSTRING_PTR(gz->z.input));
|
|
if (!gzfile_read_raw_ensure(gz, 2 + len)) {
|
|
rb_raise(cGzError, "unexpected end of file");
|
|
}
|
|
zstream_discard_input(&gz->z, 2 + len);
|
|
}
|
|
if (flags & GZ_FLAG_ORIG_NAME) {
|
|
p = gzfile_read_raw_until_zero(gz, 0);
|
|
len = p - RSTRING_PTR(gz->z.input);
|
|
gz->orig_name = rb_str_new(RSTRING_PTR(gz->z.input), len);
|
|
OBJ_TAINT(gz->orig_name); /* for safe */
|
|
zstream_discard_input(&gz->z, len + 1);
|
|
}
|
|
if (flags & GZ_FLAG_COMMENT) {
|
|
p = gzfile_read_raw_until_zero(gz, 0);
|
|
len = p - RSTRING_PTR(gz->z.input);
|
|
gz->comment = rb_str_new(RSTRING_PTR(gz->z.input), len);
|
|
OBJ_TAINT(gz->comment); /* for safe */
|
|
zstream_discard_input(&gz->z, len + 1);
|
|
}
|
|
|
|
if (gz->z.input != Qnil && RSTRING_LEN(gz->z.input) > 0) {
|
|
zstream_run(&gz->z, 0, 0, Z_SYNC_FLUSH);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gzfile_check_footer(struct gzfile *gz)
|
|
{
|
|
unsigned long crc, length;
|
|
|
|
gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
|
|
|
|
if (!gzfile_read_raw_ensure(gz, 8)) { /* 8 is the size of gzip footer */
|
|
gzfile_raise(gz, cNoFooter, "footer is not found");
|
|
}
|
|
|
|
crc = gzfile_get32((Bytef*)RSTRING_PTR(gz->z.input));
|
|
length = gzfile_get32((Bytef*)RSTRING_PTR(gz->z.input) + 4);
|
|
|
|
gz->z.stream.total_in += 8; /* to rewind correctly */
|
|
zstream_discard_input(&gz->z, 8);
|
|
|
|
if (gz->crc != crc) {
|
|
rb_raise(cCRCError, "invalid compressed data -- crc error");
|
|
}
|
|
if ((uint32_t)gz->z.stream.total_out != length) {
|
|
rb_raise(cLengthError, "invalid compressed data -- length error");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gzfile_write(struct gzfile *gz, Bytef *str, long len)
|
|
{
|
|
if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
|
|
gzfile_make_header(gz);
|
|
}
|
|
|
|
if (len > 0 || (gz->z.flags & GZFILE_FLAG_SYNC)) {
|
|
gz->crc = checksum_long(crc32, gz->crc, str, len);
|
|
zstream_run(&gz->z, str, len, (gz->z.flags & GZFILE_FLAG_SYNC)
|
|
? Z_SYNC_FLUSH : Z_NO_FLUSH);
|
|
}
|
|
gzfile_write_raw(gz);
|
|
}
|
|
|
|
static long
|
|
gzfile_read_more(struct gzfile *gz)
|
|
{
|
|
volatile VALUE str;
|
|
|
|
while (!ZSTREAM_IS_FINISHED(&gz->z)) {
|
|
str = gzfile_read_raw(gz);
|
|
if (NIL_P(str)) {
|
|
if (!ZSTREAM_IS_FINISHED(&gz->z)) {
|
|
rb_raise(cGzError, "unexpected end of file");
|
|
}
|
|
break;
|
|
}
|
|
if (RSTRING_LEN(str) > 0) { /* prevent Z_BUF_ERROR */
|
|
zstream_run(&gz->z, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str),
|
|
Z_SYNC_FLUSH);
|
|
}
|
|
if (gz->z.buf_filled > 0) break;
|
|
}
|
|
return gz->z.buf_filled;
|
|
}
|
|
|
|
static void
|
|
gzfile_calc_crc(struct gzfile *gz, VALUE str)
|
|
{
|
|
if (RSTRING_LEN(str) <= gz->ungetc) {
|
|
gz->ungetc -= RSTRING_LEN(str);
|
|
}
|
|
else {
|
|
gz->crc = checksum_long(crc32, gz->crc, (Bytef*)RSTRING_PTR(str) + gz->ungetc,
|
|
RSTRING_LEN(str) - gz->ungetc);
|
|
gz->ungetc = 0;
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_newstr(struct gzfile *gz, VALUE str)
|
|
{
|
|
if (!gz->enc2) {
|
|
rb_enc_associate(str, gz->enc);
|
|
OBJ_TAINT(str); /* for safe */
|
|
return str;
|
|
}
|
|
if (gz->ec && rb_enc_dummy_p(gz->enc2)) {
|
|
str = rb_econv_str_convert(gz->ec, str, ECONV_PARTIAL_INPUT);
|
|
rb_enc_associate(str, gz->enc);
|
|
OBJ_TAINT(str);
|
|
return str;
|
|
}
|
|
return rb_str_conv_enc_opts(str, gz->enc2, gz->enc,
|
|
gz->ecflags, gz->ecopts);
|
|
}
|
|
|
|
static long
|
|
gzfile_fill(struct gzfile *gz, long len)
|
|
{
|
|
if (len < 0)
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
if (len == 0)
|
|
return 0;
|
|
while (!ZSTREAM_IS_FINISHED(&gz->z) && gz->z.buf_filled < len) {
|
|
gzfile_read_more(gz);
|
|
}
|
|
if (GZFILE_IS_FINISHED(gz)) {
|
|
if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
return -1;
|
|
}
|
|
return len < gz->z.buf_filled ? len : gz->z.buf_filled;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_read(struct gzfile *gz, long len)
|
|
{
|
|
VALUE dst;
|
|
|
|
len = gzfile_fill(gz, len);
|
|
if (len == 0) return rb_str_new(0, 0);
|
|
if (len < 0) return Qnil;
|
|
dst = zstream_shift_buffer(&gz->z, len);
|
|
gzfile_calc_crc(gz, dst);
|
|
return dst;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_readpartial(struct gzfile *gz, long len, VALUE outbuf)
|
|
{
|
|
VALUE dst;
|
|
|
|
if (len < 0)
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
|
|
if (!NIL_P(outbuf))
|
|
OBJ_TAINT(outbuf);
|
|
|
|
if (len == 0) {
|
|
if (NIL_P(outbuf))
|
|
return rb_str_new(0, 0);
|
|
else {
|
|
rb_str_resize(outbuf, 0);
|
|
return outbuf;
|
|
}
|
|
}
|
|
while (!ZSTREAM_IS_FINISHED(&gz->z) && gz->z.buf_filled == 0) {
|
|
gzfile_read_more(gz);
|
|
}
|
|
if (GZFILE_IS_FINISHED(gz)) {
|
|
if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
if (!NIL_P(outbuf))
|
|
rb_str_resize(outbuf, 0);
|
|
rb_raise(rb_eEOFError, "end of file reached");
|
|
}
|
|
|
|
dst = zstream_shift_buffer(&gz->z, len);
|
|
gzfile_calc_crc(gz, dst);
|
|
|
|
if (!NIL_P(outbuf)) {
|
|
rb_str_resize(outbuf, RSTRING_LEN(dst));
|
|
memcpy(RSTRING_PTR(outbuf), RSTRING_PTR(dst), RSTRING_LEN(dst));
|
|
dst = outbuf;
|
|
}
|
|
OBJ_TAINT(dst); /* for safe */
|
|
return dst;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_read_all(struct gzfile *gz)
|
|
{
|
|
VALUE dst;
|
|
|
|
while (!ZSTREAM_IS_FINISHED(&gz->z)) {
|
|
gzfile_read_more(gz);
|
|
}
|
|
if (GZFILE_IS_FINISHED(gz)) {
|
|
if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
return rb_str_new(0, 0);
|
|
}
|
|
|
|
dst = zstream_detach_buffer(&gz->z);
|
|
gzfile_calc_crc(gz, dst);
|
|
OBJ_TAINT(dst);
|
|
return gzfile_newstr(gz, dst);
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_getc(struct gzfile *gz)
|
|
{
|
|
VALUE buf, dst = 0;
|
|
int len;
|
|
|
|
len = rb_enc_mbmaxlen(gz->enc);
|
|
while (!ZSTREAM_IS_FINISHED(&gz->z) && gz->z.buf_filled < len) {
|
|
gzfile_read_more(gz);
|
|
}
|
|
if (GZFILE_IS_FINISHED(gz)) {
|
|
if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
if (gz->ec && rb_enc_dummy_p(gz->enc2)) {
|
|
const unsigned char *ss, *sp, *se;
|
|
unsigned char *ds, *dp, *de;
|
|
rb_econv_result_t res;
|
|
|
|
if (!gz->cbuf) {
|
|
gz->cbuf = ALLOC_N(char, GZFILE_CBUF_CAPA);
|
|
}
|
|
ss = sp = (const unsigned char*)RSTRING_PTR(gz->z.buf);
|
|
se = sp + gz->z.buf_filled;
|
|
ds = dp = (unsigned char *)gz->cbuf;
|
|
de = (unsigned char *)ds + GZFILE_CBUF_CAPA;
|
|
res = rb_econv_convert(gz->ec, &sp, se, &dp, de, ECONV_PARTIAL_INPUT|ECONV_AFTER_OUTPUT);
|
|
rb_econv_check_error(gz->ec);
|
|
dst = zstream_shift_buffer(&gz->z, sp - ss);
|
|
gzfile_calc_crc(gz, dst);
|
|
dst = rb_str_new(gz->cbuf, dp - ds);
|
|
rb_enc_associate(dst, gz->enc);
|
|
OBJ_TAINT(dst);
|
|
return dst;
|
|
}
|
|
else {
|
|
buf = gz->z.buf;
|
|
len = rb_enc_mbclen(RSTRING_PTR(buf), RSTRING_END(buf), gz->enc);
|
|
dst = gzfile_read(gz, len);
|
|
return gzfile_newstr(gz, dst);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gzfile_ungets(struct gzfile *gz, const Bytef *b, long len)
|
|
{
|
|
zstream_buffer_ungets(&gz->z, b, len);
|
|
gz->ungetc+=len;
|
|
}
|
|
|
|
static void
|
|
gzfile_ungetbyte(struct gzfile *gz, int c)
|
|
{
|
|
zstream_buffer_ungetbyte(&gz->z, c);
|
|
gz->ungetc++;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_writer_end_run(VALUE arg)
|
|
{
|
|
struct gzfile *gz = (struct gzfile *)arg;
|
|
|
|
if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
|
|
gzfile_make_header(gz);
|
|
}
|
|
|
|
zstream_run(&gz->z, (Bytef*)"", 0, Z_FINISH);
|
|
gzfile_make_footer(gz);
|
|
gzfile_write_raw(gz);
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
gzfile_writer_end(struct gzfile *gz)
|
|
{
|
|
if (ZSTREAM_IS_CLOSING(&gz->z)) return;
|
|
gz->z.flags |= ZSTREAM_FLAG_CLOSING;
|
|
|
|
rb_ensure(gzfile_writer_end_run, (VALUE)gz, zstream_end, (VALUE)&gz->z);
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_reader_end_run(VALUE arg)
|
|
{
|
|
struct gzfile *gz = (struct gzfile *)arg;
|
|
|
|
if (GZFILE_IS_FINISHED(gz)
|
|
&& !(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
gzfile_reader_end(struct gzfile *gz)
|
|
{
|
|
if (ZSTREAM_IS_CLOSING(&gz->z)) return;
|
|
gz->z.flags |= ZSTREAM_FLAG_CLOSING;
|
|
|
|
rb_ensure(gzfile_reader_end_run, (VALUE)gz, zstream_end, (VALUE)&gz->z);
|
|
}
|
|
|
|
static void
|
|
gzfile_reader_rewind(struct gzfile *gz)
|
|
{
|
|
long n;
|
|
|
|
n = gz->z.stream.total_in;
|
|
if (!NIL_P(gz->z.input)) {
|
|
n += RSTRING_LEN(gz->z.input);
|
|
}
|
|
|
|
rb_funcall(gz->io, id_seek, 2, rb_int2inum(-n), INT2FIX(1));
|
|
gzfile_reset(gz);
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_reader_get_unused(struct gzfile *gz)
|
|
{
|
|
VALUE str;
|
|
|
|
if (!ZSTREAM_IS_READY(&gz->z)) return Qnil;
|
|
if (!GZFILE_IS_FINISHED(gz)) return Qnil;
|
|
if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
|
|
gzfile_check_footer(gz);
|
|
}
|
|
if (NIL_P(gz->z.input)) return Qnil;
|
|
|
|
str = rb_str_resurrect(gz->z.input);
|
|
OBJ_TAINT(str); /* for safe */
|
|
return str;
|
|
}
|
|
|
|
static struct gzfile *
|
|
get_gzfile(VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
if (!ZSTREAM_IS_READY(&gz->z)) {
|
|
rb_raise(cGzError, "closed gzip stream");
|
|
}
|
|
return gz;
|
|
}
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipFile
|
|
*
|
|
* Zlib::GzipFile is an abstract class for handling a gzip formatted
|
|
* compressed file. The operations are defined in the subclasses,
|
|
* Zlib::GzipReader for reading, and Zlib::GzipWriter for writing.
|
|
*
|
|
* GzipReader should be used by associating an IO, or IO-like, object.
|
|
*
|
|
* == Method Catalogue
|
|
*
|
|
* - wrap
|
|
* - open
|
|
* - #close
|
|
* - #closed?
|
|
* - #comment
|
|
* - #comment=
|
|
* - #crc
|
|
* - #eof?
|
|
* - #finish
|
|
* - #level
|
|
* - #lineno
|
|
* - #lineno=
|
|
* - #mtime
|
|
* - #mtime=
|
|
* - #orig_name
|
|
* - #orig_name=
|
|
* - #os_code
|
|
* - #path
|
|
* - #sync
|
|
* - #sync=
|
|
* - #to_io
|
|
* - #total_in
|
|
* - #total_out
|
|
*
|
|
* (due to internal structure, documentation may appear under Zlib::GzipReader
|
|
* or Zlib::GzipWriter)
|
|
*/
|
|
|
|
|
|
typedef struct {
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE klass;
|
|
} new_wrap_arg_t;
|
|
|
|
static VALUE
|
|
new_wrap(VALUE tmp)
|
|
{
|
|
new_wrap_arg_t *arg = (new_wrap_arg_t *)tmp;
|
|
return rb_class_new_instance(arg->argc, arg->argv, arg->klass);
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_ensure_close(VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
if (ZSTREAM_IS_READY(&gz->z)) {
|
|
gzfile_close(gz, 1);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
gzfile_wrap(int argc, VALUE *argv, VALUE klass, int close_io_on_error)
|
|
{
|
|
VALUE obj;
|
|
|
|
if (close_io_on_error) {
|
|
int state = 0;
|
|
new_wrap_arg_t arg;
|
|
arg.argc = argc;
|
|
arg.argv = argv;
|
|
arg.klass = klass;
|
|
obj = rb_protect(new_wrap, (VALUE)&arg, &state);
|
|
if (state) {
|
|
rb_io_close(argv[0]);
|
|
rb_jump_tag(state);
|
|
}
|
|
}
|
|
else {
|
|
obj = rb_class_new_instance(argc, argv, klass);
|
|
}
|
|
|
|
if (rb_block_given_p()) {
|
|
return rb_ensure(rb_yield, obj, gzfile_ensure_close, obj);
|
|
}
|
|
else {
|
|
return obj;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile.wrap
|
|
*
|
|
* call-seq: Zlib::GzipFile.wrap(io) { |gz| ... }
|
|
*
|
|
* Creates a GzipFile object associated with +io+, and
|
|
* executes the block with the newly created GzipFile object,
|
|
* just like File.open. The GzipFile object will be closed
|
|
* automatically after executing the block. If you want to keep
|
|
* the associated IO object opening, you may call
|
|
* +Zlib::GzipFile#finish+ method in the block.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_s_wrap(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
return gzfile_wrap(argc, argv, klass, 0);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile.open
|
|
*
|
|
* See Zlib::GzipReader#open and Zlib::GzipWriter#open.
|
|
*/
|
|
static VALUE
|
|
gzfile_s_open(int argc, VALUE *argv, VALUE klass, const char *mode)
|
|
{
|
|
VALUE io, filename;
|
|
|
|
if (argc < 1) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
|
|
}
|
|
filename = argv[0];
|
|
io = rb_file_open_str(filename, mode);
|
|
argv[0] = io;
|
|
return gzfile_wrap(argc, argv, klass, 1);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#to_io
|
|
*
|
|
* Same as IO.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_to_io(VALUE obj)
|
|
{
|
|
return get_gzfile(obj)->io;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#crc
|
|
*
|
|
* Returns CRC value of the uncompressed data.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_crc(VALUE obj)
|
|
{
|
|
return rb_uint2inum(get_gzfile(obj)->crc);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#mtime
|
|
*
|
|
* Returns last modification time recorded in the gzip file header.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_mtime(VALUE obj)
|
|
{
|
|
return rb_time_new(get_gzfile(obj)->mtime, (time_t)0);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#level
|
|
*
|
|
* Returns compression level.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_level(VALUE obj)
|
|
{
|
|
return INT2FIX(get_gzfile(obj)->level);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#os_code
|
|
*
|
|
* Returns OS code number recorded in the gzip file header.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_os_code(VALUE obj)
|
|
{
|
|
return INT2FIX(get_gzfile(obj)->os_code);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#orig_name
|
|
*
|
|
* Returns original filename recorded in the gzip file header, or +nil+ if
|
|
* original filename is not present.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_orig_name(VALUE obj)
|
|
{
|
|
VALUE str = get_gzfile(obj)->orig_name;
|
|
if (!NIL_P(str)) {
|
|
str = rb_str_dup(str);
|
|
}
|
|
OBJ_TAINT(str); /* for safe */
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#comment
|
|
*
|
|
* Returns comments recorded in the gzip file header, or nil if the comments
|
|
* is not present.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_comment(VALUE obj)
|
|
{
|
|
VALUE str = get_gzfile(obj)->comment;
|
|
if (!NIL_P(str)) {
|
|
str = rb_str_dup(str);
|
|
}
|
|
OBJ_TAINT(str); /* for safe */
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#lineno
|
|
*
|
|
* The line number of the last row read from this file.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_lineno(VALUE obj)
|
|
{
|
|
return INT2NUM(get_gzfile(obj)->lineno);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#set_lineno
|
|
*
|
|
* Specify line number of the last row read from this file.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_set_lineno(VALUE obj, VALUE lineno)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
gz->lineno = NUM2INT(lineno);
|
|
return lineno;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#set_mtime
|
|
*
|
|
* Specify the modification time (+mtime+) in the gzip header.
|
|
* Using a Fixnum or Integer
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_set_mtime(VALUE obj, VALUE mtime)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE val;
|
|
|
|
if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
|
|
rb_raise(cGzError, "header is already written");
|
|
}
|
|
|
|
if (FIXNUM_P(mtime)) {
|
|
gz->mtime = FIX2INT(mtime);
|
|
}
|
|
else {
|
|
val = rb_Integer(mtime);
|
|
gz->mtime = FIXNUM_P(val) ? FIX2UINT(val) : rb_big2ulong(val);
|
|
}
|
|
return mtime;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#set_orig_name
|
|
*
|
|
* Specify the original name (+str+) in the gzip header.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_set_orig_name(VALUE obj, VALUE str)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE s;
|
|
char *p;
|
|
|
|
if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
|
|
rb_raise(cGzError, "header is already written");
|
|
}
|
|
s = rb_str_dup(rb_str_to_str(str));
|
|
p = memchr(RSTRING_PTR(s), '\0', RSTRING_LEN(s));
|
|
if (p) {
|
|
rb_str_resize(s, p - RSTRING_PTR(s));
|
|
}
|
|
gz->orig_name = s;
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#set_comment
|
|
*
|
|
* Specify the comment (+str+) in the gzip header.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_set_comment(VALUE obj, VALUE str)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE s;
|
|
char *p;
|
|
|
|
if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
|
|
rb_raise(cGzError, "header is already written");
|
|
}
|
|
s = rb_str_dup(rb_str_to_str(str));
|
|
p = memchr(RSTRING_PTR(s), '\0', RSTRING_LEN(s));
|
|
if (p) {
|
|
rb_str_resize(s, p - RSTRING_PTR(s));
|
|
}
|
|
gz->comment = s;
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#close
|
|
*
|
|
* Closes the GzipFile object. This method calls close method of the
|
|
* associated IO object. Returns the associated IO object.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_close(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE io;
|
|
|
|
io = gz->io;
|
|
gzfile_close(gz, 1);
|
|
return io;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#finish
|
|
*
|
|
* Closes the GzipFile object. Unlike Zlib::GzipFile#close, this method never
|
|
* calls the close method of the associated IO object. Returns the associated IO
|
|
* object.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_finish(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE io;
|
|
|
|
io = gz->io;
|
|
gzfile_close(gz, 0);
|
|
return io;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#closed?
|
|
*
|
|
* Same as IO#closed?
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_closed_p(VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
return NIL_P(gz->io) ? Qtrue : Qfalse;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#eof?
|
|
*
|
|
* Returns +true+ or +false+ whether the stream has reached the end.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_eof_p(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
return GZFILE_IS_FINISHED(gz) ? Qtrue : Qfalse;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#sync
|
|
*
|
|
* Same as IO#sync
|
|
*
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_sync(VALUE obj)
|
|
{
|
|
return (get_gzfile(obj)->z.flags & GZFILE_FLAG_SYNC) ? Qtrue : Qfalse;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#set_sync
|
|
*
|
|
* call-seq: sync = flag
|
|
*
|
|
* Same as IO. If flag is +true+, the associated IO object must respond to the
|
|
* +flush+ method. While +sync+ mode is +true+, the compression ratio
|
|
* decreases sharply.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_set_sync(VALUE obj, VALUE mode)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
|
|
if (RTEST(mode)) {
|
|
gz->z.flags |= GZFILE_FLAG_SYNC;
|
|
}
|
|
else {
|
|
gz->z.flags &= ~GZFILE_FLAG_SYNC;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#total_in
|
|
*
|
|
* Total number of input bytes read so far.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_total_in(VALUE obj)
|
|
{
|
|
return rb_uint2inum(get_gzfile(obj)->z.stream.total_in);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#total_out
|
|
*
|
|
* Total number of output bytes output so far.
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_total_out(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
return rb_uint2inum(gz->z.stream.total_out - gz->z.buf_filled);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipFile#path
|
|
*
|
|
* call-seq: path
|
|
*
|
|
* Returns the path string of the associated IO-like object. This
|
|
* method is only defined when the IO-like object responds to #path().
|
|
*/
|
|
static VALUE
|
|
rb_gzfile_path(VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
return gz->path;
|
|
}
|
|
|
|
static void
|
|
rb_gzfile_ecopts(struct gzfile *gz, VALUE opts)
|
|
{
|
|
if (!NIL_P(opts)) {
|
|
rb_io_extract_encoding_option(opts, &gz->enc, &gz->enc2, NULL);
|
|
}
|
|
if (gz->enc2) {
|
|
gz->ecflags = rb_econv_prepare_opts(opts, &opts);
|
|
gz->ec = rb_econv_open_opts(gz->enc2->name, gz->enc->name,
|
|
gz->ecflags, opts);
|
|
gz->ecopts = opts;
|
|
}
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipWriter
|
|
*
|
|
* Zlib::GzipWriter is a class for writing gzipped files. GzipWriter should
|
|
* be used with an instance of IO, or IO-like, object.
|
|
*
|
|
* Following two example generate the same result.
|
|
*
|
|
* Zlib::GzipWriter.open('hoge.gz') do |gz|
|
|
* gz.write 'jugemu jugemu gokou no surikire...'
|
|
* end
|
|
*
|
|
* File.open('hoge.gz', 'w') do |f|
|
|
* gz = Zlib::GzipWriter.new(f)
|
|
* gz.write 'jugemu jugemu gokou no surikire...'
|
|
* gz.close
|
|
* end
|
|
*
|
|
* To make like gzip(1) does, run following:
|
|
*
|
|
* orig = 'hoge.txt'
|
|
* Zlib::GzipWriter.open('hoge.gz') do |gz|
|
|
* gz.mtime = File.mtime(orig)
|
|
* gz.orig_name = orig
|
|
* gz.write IO.binread(orig)
|
|
* end
|
|
*
|
|
* NOTE: Due to the limitation of Ruby's finalizer, you must explicitly close
|
|
* GzipWriter objects by Zlib::GzipWriter#close etc. Otherwise, GzipWriter
|
|
* will be not able to write the gzip footer and will generate a broken gzip
|
|
* file.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_gzwriter_s_allocate(VALUE klass)
|
|
{
|
|
return gzfile_writer_new(klass);
|
|
}
|
|
|
|
/*
|
|
* call-seq: Zlib::GzipWriter.open(filename, level=nil, strategy=nil) { |gz| ... }
|
|
*
|
|
* Opens a file specified by +filename+ for writing gzip compressed data, and
|
|
* returns a GzipWriter object associated with that file. Further details of
|
|
* this method are found in Zlib::GzipWriter.new and Zlib::GzipFile.wrap.
|
|
*/
|
|
static VALUE
|
|
rb_gzwriter_s_open(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
return gzfile_s_open(argc, argv, klass, "wb");
|
|
}
|
|
|
|
/*
|
|
* call-seq: Zlib::GzipWriter.new(io, level, strategy)
|
|
*
|
|
* Creates a GzipWriter object associated with +io+. +level+ and +strategy+
|
|
* should be the same as the arguments of Zlib::Deflate.new. The GzipWriter
|
|
* object writes gzipped data to +io+. At least, +io+ must respond to the
|
|
* +write+ method that behaves same as write method in IO class.
|
|
*/
|
|
static VALUE
|
|
rb_gzwriter_initialize(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
VALUE io, level, strategy, opt = Qnil;
|
|
int err;
|
|
|
|
if (argc > 1) {
|
|
opt = rb_check_convert_type(argv[argc-1], T_HASH, "Hash", "to_hash");
|
|
if (!NIL_P(opt)) argc--;
|
|
}
|
|
|
|
rb_scan_args(argc, argv, "12", &io, &level, &strategy);
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
|
|
/* this is undocumented feature of zlib */
|
|
gz->level = ARG_LEVEL(level);
|
|
err = deflateInit2(&gz->z.stream, gz->level, Z_DEFLATED,
|
|
-MAX_WBITS, DEF_MEM_LEVEL, ARG_STRATEGY(strategy));
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, gz->z.stream.msg);
|
|
}
|
|
gz->io = io;
|
|
ZSTREAM_READY(&gz->z);
|
|
rb_gzfile_ecopts(gz, opt);
|
|
|
|
if (rb_respond_to(io, id_path)) {
|
|
gz->path = rb_funcall(gz->io, id_path, 0);
|
|
rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq: flush(flush=nil)
|
|
*
|
|
* Flushes all the internal buffers of the GzipWriter object. The meaning of
|
|
* +flush+ is same as in Zlib::Deflate#deflate. <tt>Zlib::SYNC_FLUSH</tt> is used if
|
|
* +flush+ is omitted. It is no use giving flush <tt>Zlib::NO_FLUSH</tt>.
|
|
*/
|
|
static VALUE
|
|
rb_gzwriter_flush(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE v_flush;
|
|
int flush;
|
|
|
|
rb_scan_args(argc, argv, "01", &v_flush);
|
|
|
|
flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
|
|
if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
|
|
zstream_run(&gz->z, (Bytef*)"", 0, flush);
|
|
}
|
|
|
|
gzfile_write_raw(gz);
|
|
if (rb_respond_to(gz->io, id_flush)) {
|
|
rb_funcall(gz->io, id_flush, 0);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* Same as IO.
|
|
*/
|
|
static VALUE
|
|
rb_gzwriter_write(VALUE obj, VALUE str)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
|
|
if (TYPE(str) != T_STRING)
|
|
str = rb_obj_as_string(str);
|
|
if (gz->enc2 && gz->enc2 != rb_ascii8bit_encoding()) {
|
|
str = rb_str_conv_enc(str, rb_enc_get(str), gz->enc2);
|
|
}
|
|
gzfile_write(gz, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str));
|
|
return INT2FIX(RSTRING_LEN(str));
|
|
}
|
|
|
|
/*
|
|
* Same as IO.
|
|
*/
|
|
static VALUE
|
|
rb_gzwriter_putc(VALUE obj, VALUE ch)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
char c = NUM2CHR(ch);
|
|
|
|
gzfile_write(gz, (Bytef*)&c, 1);
|
|
return ch;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Document-method: <<
|
|
* Same as IO.
|
|
*/
|
|
#define rb_gzwriter_addstr rb_io_addstr
|
|
/*
|
|
* Document-method: printf
|
|
* Same as IO.
|
|
*/
|
|
#define rb_gzwriter_printf rb_io_printf
|
|
/*
|
|
* Document-method: print
|
|
* Same as IO.
|
|
*/
|
|
#define rb_gzwriter_print rb_io_print
|
|
/*
|
|
* Document-method: puts
|
|
* Same as IO.
|
|
*/
|
|
#define rb_gzwriter_puts rb_io_puts
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipReader
|
|
*
|
|
* Zlib::GzipReader is the class for reading a gzipped file. GzipReader should
|
|
* be used an IO, or -IO-lie, object.
|
|
*
|
|
* Zlib::GzipReader.open('hoge.gz') {|gz|
|
|
* print gz.read
|
|
* }
|
|
*
|
|
* File.open('hoge.gz') do |f|
|
|
* gz = Zlib::GzipReader.new(f)
|
|
* print gz.read
|
|
* gz.close
|
|
* end
|
|
*
|
|
* == Method Catalogue
|
|
*
|
|
* The following methods in Zlib::GzipReader are just like their counterparts
|
|
* in IO, but they raise Zlib::Error or Zlib::GzipFile::Error exception if an
|
|
* error was found in the gzip file.
|
|
* - #each
|
|
* - #each_line
|
|
* - #each_byte
|
|
* - #gets
|
|
* - #getc
|
|
* - #lineno
|
|
* - #lineno=
|
|
* - #read
|
|
* - #readchar
|
|
* - #readline
|
|
* - #readlines
|
|
* - #ungetc
|
|
*
|
|
* Be careful of the footer of the gzip file. A gzip file has the checksum of
|
|
* pre-compressed data in its footer. GzipReader checks all uncompressed data
|
|
* against that checksum at the following cases, and if it fails, raises
|
|
* <tt>Zlib::GzipFile::NoFooter</tt>, <tt>Zlib::GzipFile::CRCError</tt>, or
|
|
* <tt>Zlib::GzipFile::LengthError</tt> exception.
|
|
*
|
|
* - When an reading request is received beyond the end of file (the end of
|
|
* compressed data). That is, when Zlib::GzipReader#read,
|
|
* Zlib::GzipReader#gets, or some other methods for reading returns nil.
|
|
* - When Zlib::GzipFile#close method is called after the object reaches the
|
|
* end of file.
|
|
* - When Zlib::GzipReader#unused method is called after the object reaches
|
|
* the end of file.
|
|
*
|
|
* The rest of the methods are adequately described in their own
|
|
* documentation.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_gzreader_s_allocate(VALUE klass)
|
|
{
|
|
return gzfile_reader_new(klass);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader.open
|
|
*
|
|
* call-seq: Zlib::GzipReader.open(filename) {|gz| ... }
|
|
*
|
|
* Opens a file specified by +filename+ as a gzipped file, and returns a
|
|
* GzipReader object associated with that file. Further details of this method
|
|
* are in Zlib::GzipReader.new and ZLib::GzipFile.wrap.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_s_open(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
return gzfile_s_open(argc, argv, klass, "rb");
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader.new
|
|
*
|
|
* call-seq: Zlib::GzipReader.new(io)
|
|
*
|
|
* Creates a GzipReader object associated with +io+. The GzipReader object reads
|
|
* gzipped data from +io+, and parses/decompresses them. At least, +io+ must have
|
|
* a +read+ method that behaves same as the +read+ method in IO class.
|
|
*
|
|
* If the gzip file header is incorrect, raises an Zlib::GzipFile::Error
|
|
* exception.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_initialize(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
VALUE io, opt = Qnil;
|
|
struct gzfile *gz;
|
|
int err;
|
|
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
rb_scan_args(argc, argv, "1:", &io, &opt);
|
|
|
|
/* this is undocumented feature of zlib */
|
|
err = inflateInit2(&gz->z.stream, -MAX_WBITS);
|
|
if (err != Z_OK) {
|
|
raise_zlib_error(err, gz->z.stream.msg);
|
|
}
|
|
gz->io = io;
|
|
ZSTREAM_READY(&gz->z);
|
|
gzfile_read_header(gz);
|
|
rb_gzfile_ecopts(gz, opt);
|
|
|
|
if (rb_respond_to(io, id_path)) {
|
|
gz->path = rb_funcall(gz->io, id_path, 0);
|
|
rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#rewind
|
|
*
|
|
* Resets the position of the file pointer to the point created the GzipReader
|
|
* object. The associated IO object needs to respond to the +seek+ method.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_rewind(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
gzfile_reader_rewind(gz);
|
|
return INT2FIX(0);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#unused
|
|
*
|
|
* Returns the rest of the data which had read for parsing gzip format, or
|
|
* +nil+ if the whole gzip file is not parsed yet.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_unused(VALUE obj)
|
|
{
|
|
struct gzfile *gz;
|
|
Data_Get_Struct(obj, struct gzfile, gz);
|
|
return gzfile_reader_get_unused(gz);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#read
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_read(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE vlen;
|
|
long len;
|
|
|
|
rb_scan_args(argc, argv, "01", &vlen);
|
|
if (NIL_P(vlen)) {
|
|
return gzfile_read_all(gz);
|
|
}
|
|
|
|
len = NUM2INT(vlen);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
}
|
|
return gzfile_read(gz, len);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#readpartial
|
|
*
|
|
* call-seq:
|
|
* gzipreader.readpartial(maxlen [, outbuf]) => string, outbuf
|
|
*
|
|
* Reads at most <i>maxlen</i> bytes from the gziped stream but
|
|
* it blocks only if <em>gzipreader</em> has no data immediately available.
|
|
* If the optional <i>outbuf</i> argument is present,
|
|
* it must reference a String, which will receive the data.
|
|
* It raises <code>EOFError</code> on end of file.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_readpartial(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE vlen, outbuf;
|
|
long len;
|
|
|
|
rb_scan_args(argc, argv, "11", &vlen, &outbuf);
|
|
|
|
len = NUM2INT(vlen);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
}
|
|
if (!NIL_P(outbuf))
|
|
Check_Type(outbuf, T_STRING);
|
|
return gzfile_readpartial(gz, len, outbuf);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#getc
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_getc(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
|
|
return gzfile_getc(gz);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#readchar
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_readchar(VALUE obj)
|
|
{
|
|
VALUE dst;
|
|
dst = rb_gzreader_getc(obj);
|
|
if (NIL_P(dst)) {
|
|
rb_raise(rb_eEOFError, "end of file reached");
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#getbyte
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_getbyte(VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
VALUE dst;
|
|
|
|
dst = gzfile_read(gz, 1);
|
|
if (!NIL_P(dst)) {
|
|
dst = INT2FIX((unsigned int)(RSTRING_PTR(dst)[0]) & 0xff);
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#readbyte
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_readbyte(VALUE obj)
|
|
{
|
|
VALUE dst;
|
|
dst = rb_gzreader_getbyte(obj);
|
|
if (NIL_P(dst)) {
|
|
rb_raise(rb_eEOFError, "end of file reached");
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#each_char
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_each_char(VALUE obj)
|
|
{
|
|
VALUE c;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
while (!NIL_P(c = rb_gzreader_getc(obj))) {
|
|
rb_yield(c);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#each_byte
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_each_byte(VALUE obj)
|
|
{
|
|
VALUE c;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
while (!NIL_P(c = rb_gzreader_getbyte(obj))) {
|
|
rb_yield(c);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#ungetc
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_ungetc(VALUE obj, VALUE s)
|
|
{
|
|
struct gzfile *gz;
|
|
|
|
if (FIXNUM_P(s))
|
|
return rb_gzreader_ungetbyte(obj, s);
|
|
gz = get_gzfile(obj);
|
|
StringValue(s);
|
|
if (gz->enc2 && gz->enc2 != rb_ascii8bit_encoding()) {
|
|
s = rb_str_conv_enc(s, rb_enc_get(s), gz->enc2);
|
|
}
|
|
gzfile_ungets(gz, (const Bytef*)RSTRING_PTR(s), RSTRING_LEN(s));
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#ungetbyte
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_ungetbyte(VALUE obj, VALUE ch)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
gzfile_ungetbyte(gz, NUM2CHR(ch));
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
gzreader_skip_linebreaks(struct gzfile *gz)
|
|
{
|
|
VALUE str;
|
|
char *p;
|
|
int n;
|
|
|
|
while (gz->z.buf_filled == 0) {
|
|
if (GZFILE_IS_FINISHED(gz)) return;
|
|
gzfile_read_more(gz);
|
|
}
|
|
n = 0;
|
|
p = RSTRING_PTR(gz->z.buf);
|
|
|
|
while (n++, *(p++) == '\n') {
|
|
if (n >= gz->z.buf_filled) {
|
|
str = zstream_detach_buffer(&gz->z);
|
|
gzfile_calc_crc(gz, str);
|
|
while (gz->z.buf_filled == 0) {
|
|
if (GZFILE_IS_FINISHED(gz)) return;
|
|
gzfile_read_more(gz);
|
|
}
|
|
n = 0;
|
|
p = RSTRING_PTR(gz->z.buf);
|
|
}
|
|
}
|
|
|
|
str = zstream_shift_buffer(&gz->z, n - 1);
|
|
gzfile_calc_crc(gz, str);
|
|
}
|
|
|
|
static void
|
|
rscheck(const char *rsptr, long rslen, VALUE rs)
|
|
{
|
|
if (RSTRING_PTR(rs) != rsptr && RSTRING_LEN(rs) != rslen)
|
|
rb_raise(rb_eRuntimeError, "rs modified");
|
|
}
|
|
|
|
static long
|
|
gzreader_charboundary(struct gzfile *gz, long n)
|
|
{
|
|
char *s = RSTRING_PTR(gz->z.buf);
|
|
char *e = s + gz->z.buf_filled;
|
|
char *p = rb_enc_left_char_head(s, s + n, e, gz->enc);
|
|
long l = p - s;
|
|
if (l < n) {
|
|
n = rb_enc_precise_mbclen(p, e, gz->enc);
|
|
if (MBCLEN_NEEDMORE_P(n)) {
|
|
if ((l = gzfile_fill(gz, l + MBCLEN_NEEDMORE_LEN(n))) > 0) {
|
|
return l;
|
|
}
|
|
}
|
|
else if (MBCLEN_CHARFOUND_P(n)) {
|
|
return l + MBCLEN_CHARFOUND_LEN(n);
|
|
}
|
|
}
|
|
return n;
|
|
}
|
|
|
|
static VALUE
|
|
gzreader_gets(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
struct gzfile *gz = get_gzfile(obj);
|
|
volatile VALUE rs;
|
|
VALUE dst;
|
|
const char *rsptr;
|
|
char *p, *res;
|
|
long rslen, n, limit = -1;
|
|
int rspara;
|
|
rb_encoding *enc = gz->enc;
|
|
int maxlen = rb_enc_mbmaxlen(enc);
|
|
|
|
if (argc == 0) {
|
|
rs = rb_rs;
|
|
}
|
|
else {
|
|
VALUE lim, tmp;
|
|
|
|
rb_scan_args(argc, argv, "11", &rs, &lim);
|
|
if (!NIL_P(lim)) {
|
|
if (!NIL_P(rs)) StringValue(rs);
|
|
}
|
|
else if (!NIL_P(rs)) {
|
|
tmp = rb_check_string_type(rs);
|
|
if (NIL_P(tmp)) {
|
|
lim = rs;
|
|
rs = rb_rs;
|
|
}
|
|
else {
|
|
rs = tmp;
|
|
}
|
|
}
|
|
if (!NIL_P(lim)) {
|
|
limit = NUM2LONG(lim);
|
|
if (limit == 0) return rb_str_new(0,0);
|
|
}
|
|
}
|
|
|
|
if (NIL_P(rs)) {
|
|
if (limit < 0) {
|
|
dst = gzfile_read_all(gz);
|
|
if (RSTRING_LEN(dst) == 0) return Qnil;
|
|
}
|
|
else if ((n = gzfile_fill(gz, limit)) <= 0) {
|
|
return Qnil;
|
|
}
|
|
else {
|
|
if (maxlen > 1 && n >= limit && !GZFILE_IS_FINISHED(gz)) {
|
|
n = gzreader_charboundary(gz, n);
|
|
}
|
|
else {
|
|
n = limit;
|
|
}
|
|
dst = zstream_shift_buffer(&gz->z, n);
|
|
gzfile_calc_crc(gz, dst);
|
|
dst = gzfile_newstr(gz, dst);
|
|
}
|
|
gz->lineno++;
|
|
return dst;
|
|
}
|
|
|
|
if (RSTRING_LEN(rs) == 0) {
|
|
rsptr = "\n\n";
|
|
rslen = 2;
|
|
rspara = 1;
|
|
} else {
|
|
rsptr = RSTRING_PTR(rs);
|
|
rslen = RSTRING_LEN(rs);
|
|
rspara = 0;
|
|
}
|
|
|
|
if (rspara) {
|
|
gzreader_skip_linebreaks(gz);
|
|
}
|
|
|
|
while (gz->z.buf_filled < rslen) {
|
|
if (ZSTREAM_IS_FINISHED(&gz->z)) {
|
|
if (gz->z.buf_filled > 0) gz->lineno++;
|
|
return gzfile_read(gz, rslen);
|
|
}
|
|
gzfile_read_more(gz);
|
|
}
|
|
|
|
p = RSTRING_PTR(gz->z.buf);
|
|
n = rslen;
|
|
for (;;) {
|
|
long filled;
|
|
if (n > gz->z.buf_filled) {
|
|
if (ZSTREAM_IS_FINISHED(&gz->z)) break;
|
|
gzfile_read_more(gz);
|
|
p = RSTRING_PTR(gz->z.buf) + n - rslen;
|
|
}
|
|
if (!rspara) rscheck(rsptr, rslen, rs);
|
|
filled = gz->z.buf_filled;
|
|
if (limit > 0 && filled >= limit) {
|
|
filled = limit;
|
|
}
|
|
res = memchr(p, rsptr[0], (filled - n + 1));
|
|
if (!res) {
|
|
n = filled;
|
|
if (limit > 0 && filled >= limit) break;
|
|
n++;
|
|
} else {
|
|
n += (long)(res - p);
|
|
p = res;
|
|
if (rslen == 1 || memcmp(p, rsptr, rslen) == 0) break;
|
|
p++, n++;
|
|
}
|
|
}
|
|
if (maxlen > 1 && n == limit && (gz->z.buf_filled > n || !ZSTREAM_IS_FINISHED(&gz->z))) {
|
|
n = gzreader_charboundary(gz, n);
|
|
}
|
|
|
|
gz->lineno++;
|
|
dst = gzfile_read(gz, n);
|
|
if (rspara) {
|
|
gzreader_skip_linebreaks(gz);
|
|
}
|
|
|
|
return gzfile_newstr(gz, dst);
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#gets
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_gets(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
VALUE dst;
|
|
dst = gzreader_gets(argc, argv, obj);
|
|
if (!NIL_P(dst)) {
|
|
rb_lastline_set(dst);
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#readline
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_readline(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
VALUE dst;
|
|
dst = rb_gzreader_gets(argc, argv, obj);
|
|
if (NIL_P(dst)) {
|
|
rb_raise(rb_eEOFError, "end of file reached");
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#each
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_each(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
VALUE str;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
|
|
rb_yield(str);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* Document-method: Zlib::GzipReader#readlines
|
|
*
|
|
* See Zlib::GzipReader documentation for a description.
|
|
*/
|
|
static VALUE
|
|
rb_gzreader_readlines(int argc, VALUE *argv, VALUE obj)
|
|
{
|
|
VALUE str, dst;
|
|
dst = rb_ary_new();
|
|
while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
|
|
rb_ary_push(dst, str);
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
#endif /* GZIP_SUPPORT */
|
|
|
|
|
|
|
|
/*
|
|
* Document-module: Zlib
|
|
*
|
|
* The Zlib module contains several classes for compressing and decompressing
|
|
* streams, and for working with "gzip" files.
|
|
*
|
|
* == Classes
|
|
*
|
|
* Following are the classes that are most likely to be of interest to the
|
|
* user:
|
|
* Zlib::Inflate
|
|
* Zlib::Deflate
|
|
* Zlib::GzipReader
|
|
* Zlib::GzipWriter
|
|
*
|
|
* There are two important base classes for the classes above: Zlib::ZStream
|
|
* and Zlib::GzipFile. Everything else is an error class.
|
|
*
|
|
* == Constants
|
|
*
|
|
* Here's a list.
|
|
*
|
|
* Zlib::VERSION
|
|
* The Ruby/zlib version string.
|
|
*
|
|
* Zlib::ZLIB_VERSION
|
|
* The string which represents the version of zlib.h.
|
|
*
|
|
* Zlib::BINARY
|
|
* Zlib::ASCII
|
|
* Zlib::UNKNOWN
|
|
* The integers representing data types which Zlib::ZStream#data_type
|
|
* method returns.
|
|
*
|
|
* Zlib::NO_COMPRESSION
|
|
* Zlib::BEST_SPEED
|
|
* Zlib::BEST_COMPRESSION
|
|
* Zlib::DEFAULT_COMPRESSION
|
|
* The integers representing compression levels which are an argument
|
|
* for Zlib::Deflate.new, Zlib::Deflate#deflate, and so on.
|
|
*
|
|
* Zlib::FILTERED
|
|
* Zlib::HUFFMAN_ONLY
|
|
* Zlib::DEFAULT_STRATEGY
|
|
* The integers representing compression methods which are an argument
|
|
* for Zlib::Deflate.new and Zlib::Deflate#params.
|
|
*
|
|
* Zlib::DEF_MEM_LEVEL
|
|
* Zlib::MAX_MEM_LEVEL
|
|
* The integers representing memory levels which are an argument for
|
|
* Zlib::Deflate.new, Zlib::Deflate#params, and so on.
|
|
*
|
|
* Zlib::MAX_WBITS
|
|
* The default value of windowBits which is an argument for
|
|
* Zlib::Deflate.new and Zlib::Inflate.new.
|
|
*
|
|
* Zlib::NO_FLUSH
|
|
* Zlib::SYNC_FLUSH
|
|
* Zlib::FULL_FLUSH
|
|
* Zlib::FINISH
|
|
* The integers to control the output of the deflate stream, which are
|
|
* an argument for Zlib::Deflate#deflate and so on.
|
|
*
|
|
* Zlib::OS_CODE
|
|
* Zlib::OS_MSDOS
|
|
* Zlib::OS_AMIGA
|
|
* Zlib::OS_VMS
|
|
* Zlib::OS_UNIX
|
|
* Zlib::OS_VMCMS
|
|
* Zlib::OS_ATARI
|
|
* Zlib::OS_OS2
|
|
* Zlib::OS_MACOS
|
|
* Zlib::OS_ZSYSTEM
|
|
* Zlib::OS_CPM
|
|
* Zlib::OS_TOPS20
|
|
* Zlib::OS_WIN32
|
|
* Zlib::OS_QDOS
|
|
* Zlib::OS_RISCOS
|
|
* Zlib::OS_UNKNOWN
|
|
* The return values of Zlib::GzipFile#os_code method.
|
|
*/
|
|
void
|
|
Init_zlib()
|
|
{
|
|
VALUE mZlib, cZStream, cDeflate, cInflate;
|
|
#if GZIP_SUPPORT
|
|
VALUE cGzipFile, cGzipWriter, cGzipReader;
|
|
#endif
|
|
|
|
mZlib = rb_define_module("Zlib");
|
|
|
|
cZError = rb_define_class_under(mZlib, "Error", rb_eStandardError);
|
|
cStreamEnd = rb_define_class_under(mZlib, "StreamEnd", cZError);
|
|
cNeedDict = rb_define_class_under(mZlib, "NeedDict", cZError);
|
|
cDataError = rb_define_class_under(mZlib, "DataError", cZError);
|
|
cStreamError = rb_define_class_under(mZlib, "StreamError", cZError);
|
|
cMemError = rb_define_class_under(mZlib, "MemError", cZError);
|
|
cBufError = rb_define_class_under(mZlib, "BufError", cZError);
|
|
cVersionError = rb_define_class_under(mZlib, "VersionError", cZError);
|
|
|
|
rb_define_module_function(mZlib, "zlib_version", rb_zlib_version, 0);
|
|
rb_define_module_function(mZlib, "adler32", rb_zlib_adler32, -1);
|
|
rb_define_module_function(mZlib, "adler32_combine", rb_zlib_adler32_combine, 3);
|
|
rb_define_module_function(mZlib, "crc32", rb_zlib_crc32, -1);
|
|
rb_define_module_function(mZlib, "crc32_combine", rb_zlib_crc32_combine, 3);
|
|
rb_define_module_function(mZlib, "crc_table", rb_zlib_crc_table, 0);
|
|
|
|
/* The Ruby/zlib version string. */
|
|
rb_define_const(mZlib, "VERSION", rb_str_new2(RUBY_ZLIB_VERSION));
|
|
/* The string which represents the version of zlib.h */
|
|
rb_define_const(mZlib, "ZLIB_VERSION", rb_str_new2(ZLIB_VERSION));
|
|
|
|
cZStream = rb_define_class_under(mZlib, "ZStream", rb_cObject);
|
|
rb_undef_alloc_func(cZStream);
|
|
rb_define_method(cZStream, "avail_out", rb_zstream_avail_out, 0);
|
|
rb_define_method(cZStream, "avail_out=", rb_zstream_set_avail_out, 1);
|
|
rb_define_method(cZStream, "avail_in", rb_zstream_avail_in, 0);
|
|
rb_define_method(cZStream, "total_in", rb_zstream_total_in, 0);
|
|
rb_define_method(cZStream, "total_out", rb_zstream_total_out, 0);
|
|
rb_define_method(cZStream, "data_type", rb_zstream_data_type, 0);
|
|
rb_define_method(cZStream, "adler", rb_zstream_adler, 0);
|
|
rb_define_method(cZStream, "finished?", rb_zstream_finished_p, 0);
|
|
rb_define_method(cZStream, "stream_end?", rb_zstream_finished_p, 0);
|
|
rb_define_method(cZStream, "closed?", rb_zstream_closed_p, 0);
|
|
rb_define_method(cZStream, "ended?", rb_zstream_closed_p, 0);
|
|
rb_define_method(cZStream, "close", rb_zstream_end, 0);
|
|
rb_define_method(cZStream, "end", rb_zstream_end, 0);
|
|
rb_define_method(cZStream, "reset", rb_zstream_reset, 0);
|
|
rb_define_method(cZStream, "finish", rb_zstream_finish, 0);
|
|
rb_define_method(cZStream, "flush_next_in", rb_zstream_flush_next_in, 0);
|
|
rb_define_method(cZStream, "flush_next_out", rb_zstream_flush_next_out, 0);
|
|
|
|
/* Integer representing date types which
|
|
* ZStream#data_type method returns */
|
|
rb_define_const(mZlib, "BINARY", INT2FIX(Z_BINARY));
|
|
/* Integer representing date types which
|
|
* ZStream#data_type method returns */
|
|
rb_define_const(mZlib, "ASCII", INT2FIX(Z_ASCII));
|
|
/* Integer representing date types which
|
|
* ZStream#data_type method returns */
|
|
rb_define_const(mZlib, "UNKNOWN", INT2FIX(Z_UNKNOWN));
|
|
|
|
cDeflate = rb_define_class_under(mZlib, "Deflate", cZStream);
|
|
rb_define_singleton_method(cDeflate, "deflate", rb_deflate_s_deflate, -1);
|
|
rb_define_singleton_method(mZlib, "deflate", rb_deflate_s_deflate, -1);
|
|
rb_define_alloc_func(cDeflate, rb_deflate_s_allocate);
|
|
rb_define_method(cDeflate, "initialize", rb_deflate_initialize, -1);
|
|
rb_define_method(cDeflate, "initialize_copy", rb_deflate_init_copy, 1);
|
|
rb_define_method(cDeflate, "deflate", rb_deflate_deflate, -1);
|
|
rb_define_method(cDeflate, "<<", rb_deflate_addstr, 1);
|
|
rb_define_method(cDeflate, "flush", rb_deflate_flush, -1);
|
|
rb_define_method(cDeflate, "params", rb_deflate_params, 2);
|
|
rb_define_method(cDeflate, "set_dictionary", rb_deflate_set_dictionary, 1);
|
|
|
|
cInflate = rb_define_class_under(mZlib, "Inflate", cZStream);
|
|
rb_define_singleton_method(cInflate, "inflate", rb_inflate_s_inflate, 1);
|
|
rb_define_singleton_method(mZlib, "inflate", rb_inflate_s_inflate, 1);
|
|
rb_define_alloc_func(cInflate, rb_inflate_s_allocate);
|
|
rb_define_method(cInflate, "initialize", rb_inflate_initialize, -1);
|
|
rb_define_method(cInflate, "inflate", rb_inflate_inflate, 1);
|
|
rb_define_method(cInflate, "<<", rb_inflate_addstr, 1);
|
|
rb_define_method(cInflate, "sync", rb_inflate_sync, 1);
|
|
rb_define_method(cInflate, "sync_point?", rb_inflate_sync_point_p, 0);
|
|
rb_define_method(cInflate, "set_dictionary", rb_inflate_set_dictionary, 1);
|
|
|
|
/* compression level 0
|
|
*
|
|
* Which is an argument for Deflate.new, Deflate#deflate, and so on. */
|
|
rb_define_const(mZlib, "NO_COMPRESSION", INT2FIX(Z_NO_COMPRESSION));
|
|
/* compression level 1
|
|
*
|
|
* Which is an argument for Deflate.new, Deflate#deflate, and so on. */
|
|
rb_define_const(mZlib, "BEST_SPEED", INT2FIX(Z_BEST_SPEED));
|
|
/* compression level 9
|
|
*
|
|
* Which is an argument for Deflate.new, Deflate#deflate, and so on. */
|
|
rb_define_const(mZlib, "BEST_COMPRESSION", INT2FIX(Z_BEST_COMPRESSION));
|
|
/* compression level -1
|
|
*
|
|
* Which is an argument for Deflate.new, Deflate#deflate, and so on. */
|
|
rb_define_const(mZlib, "DEFAULT_COMPRESSION",
|
|
INT2FIX(Z_DEFAULT_COMPRESSION));
|
|
|
|
/* compression method 1
|
|
*
|
|
* Which is an argument for Deflate.new and Deflate#params. */
|
|
rb_define_const(mZlib, "FILTERED", INT2FIX(Z_FILTERED));
|
|
/* compression method 2
|
|
*
|
|
* Which is an argument for Deflate.new and Deflate#params. */
|
|
rb_define_const(mZlib, "HUFFMAN_ONLY", INT2FIX(Z_HUFFMAN_ONLY));
|
|
/* compression method 0
|
|
*
|
|
* Which is an argument for Deflate.new and Deflate#params. */
|
|
rb_define_const(mZlib, "DEFAULT_STRATEGY", INT2FIX(Z_DEFAULT_STRATEGY));
|
|
|
|
/* The default value of windowBits which is an argument for
|
|
* Deflate.new and Inflate.new.
|
|
*/
|
|
rb_define_const(mZlib, "MAX_WBITS", INT2FIX(MAX_WBITS));
|
|
/* Default value is 8
|
|
*
|
|
* The integer representing memory levels.
|
|
* Which are an argument for Deflate.new, Deflate#params, and so on. */
|
|
rb_define_const(mZlib, "DEF_MEM_LEVEL", INT2FIX(DEF_MEM_LEVEL));
|
|
/* Maximum level is 9
|
|
*
|
|
* The integers representing memory levels which are an argument for
|
|
* Deflate.new, Deflate#params, and so on. */
|
|
rb_define_const(mZlib, "MAX_MEM_LEVEL", INT2FIX(MAX_MEM_LEVEL));
|
|
|
|
/* Output control - 0
|
|
*
|
|
* The integers to control the output of the deflate stream, which are
|
|
* an argument for Deflate#deflate and so on. */
|
|
rb_define_const(mZlib, "NO_FLUSH", INT2FIX(Z_NO_FLUSH));
|
|
/* Output control - 2
|
|
*
|
|
* The integers to control the output of the deflate stream, which are
|
|
* an argument for Deflate#deflate and so on. */
|
|
rb_define_const(mZlib, "SYNC_FLUSH", INT2FIX(Z_SYNC_FLUSH));
|
|
/* Output control - 3
|
|
*
|
|
* The integers to control the output of the deflate stream, which are
|
|
* an argument for Deflate#deflate and so on. */
|
|
rb_define_const(mZlib, "FULL_FLUSH", INT2FIX(Z_FULL_FLUSH));
|
|
/* Oputput control - 4
|
|
*
|
|
* The integers to control the output of the deflate stream, which are
|
|
* an argument for Deflate#deflate and so on. */
|
|
rb_define_const(mZlib, "FINISH", INT2FIX(Z_FINISH));
|
|
|
|
#if GZIP_SUPPORT
|
|
id_write = rb_intern("write");
|
|
id_read = rb_intern("read");
|
|
id_readpartial = rb_intern("readpartial");
|
|
id_flush = rb_intern("flush");
|
|
id_seek = rb_intern("seek");
|
|
id_close = rb_intern("close");
|
|
id_path = rb_intern("path");
|
|
id_input = rb_intern("@input");
|
|
|
|
cGzipFile = rb_define_class_under(mZlib, "GzipFile", rb_cObject);
|
|
cGzError = rb_define_class_under(cGzipFile, "Error", cZError);
|
|
|
|
/* input gzipped string */
|
|
rb_define_attr(cGzError, "input", 1, 0);
|
|
rb_define_method(cGzError, "inspect", gzfile_error_inspect, 0);
|
|
|
|
cNoFooter = rb_define_class_under(cGzipFile, "NoFooter", cGzError);
|
|
cCRCError = rb_define_class_under(cGzipFile, "CRCError", cGzError);
|
|
cLengthError = rb_define_class_under(cGzipFile,"LengthError",cGzError);
|
|
|
|
cGzipWriter = rb_define_class_under(mZlib, "GzipWriter", cGzipFile);
|
|
cGzipReader = rb_define_class_under(mZlib, "GzipReader", cGzipFile);
|
|
rb_include_module(cGzipReader, rb_mEnumerable);
|
|
|
|
rb_define_singleton_method(cGzipFile, "wrap", rb_gzfile_s_wrap, -1);
|
|
rb_undef_alloc_func(cGzipFile);
|
|
rb_define_method(cGzipFile, "to_io", rb_gzfile_to_io, 0);
|
|
rb_define_method(cGzipFile, "crc", rb_gzfile_crc, 0);
|
|
rb_define_method(cGzipFile, "mtime", rb_gzfile_mtime, 0);
|
|
rb_define_method(cGzipFile, "level", rb_gzfile_level, 0);
|
|
rb_define_method(cGzipFile, "os_code", rb_gzfile_os_code, 0);
|
|
rb_define_method(cGzipFile, "orig_name", rb_gzfile_orig_name, 0);
|
|
rb_define_method(cGzipFile, "comment", rb_gzfile_comment, 0);
|
|
rb_define_method(cGzipReader, "lineno", rb_gzfile_lineno, 0);
|
|
rb_define_method(cGzipReader, "lineno=", rb_gzfile_set_lineno, 1);
|
|
rb_define_method(cGzipWriter, "mtime=", rb_gzfile_set_mtime, 1);
|
|
rb_define_method(cGzipWriter, "orig_name=", rb_gzfile_set_orig_name,1);
|
|
rb_define_method(cGzipWriter, "comment=", rb_gzfile_set_comment, 1);
|
|
rb_define_method(cGzipFile, "close", rb_gzfile_close, 0);
|
|
rb_define_method(cGzipFile, "finish", rb_gzfile_finish, 0);
|
|
rb_define_method(cGzipFile, "closed?", rb_gzfile_closed_p, 0);
|
|
rb_define_method(cGzipReader, "eof", rb_gzfile_eof_p, 0);
|
|
rb_define_method(cGzipReader, "eof?", rb_gzfile_eof_p, 0);
|
|
rb_define_method(cGzipFile, "sync", rb_gzfile_sync, 0);
|
|
rb_define_method(cGzipFile, "sync=", rb_gzfile_set_sync, 1);
|
|
rb_define_method(cGzipReader, "pos", rb_gzfile_total_out, 0);
|
|
rb_define_method(cGzipWriter, "pos", rb_gzfile_total_in, 0);
|
|
rb_define_method(cGzipReader, "tell", rb_gzfile_total_out, 0);
|
|
rb_define_method(cGzipWriter, "tell", rb_gzfile_total_in, 0);
|
|
|
|
rb_define_singleton_method(cGzipWriter, "open", rb_gzwriter_s_open,-1);
|
|
rb_define_alloc_func(cGzipWriter, rb_gzwriter_s_allocate);
|
|
rb_define_method(cGzipWriter, "initialize", rb_gzwriter_initialize,-1);
|
|
rb_define_method(cGzipWriter, "flush", rb_gzwriter_flush, -1);
|
|
rb_define_method(cGzipWriter, "write", rb_gzwriter_write, 1);
|
|
rb_define_method(cGzipWriter, "putc", rb_gzwriter_putc, 1);
|
|
rb_define_method(cGzipWriter, "<<", rb_gzwriter_addstr, 1);
|
|
rb_define_method(cGzipWriter, "printf", rb_gzwriter_printf, -1);
|
|
rb_define_method(cGzipWriter, "print", rb_gzwriter_print, -1);
|
|
rb_define_method(cGzipWriter, "puts", rb_gzwriter_puts, -1);
|
|
|
|
rb_define_singleton_method(cGzipReader, "open", rb_gzreader_s_open,-1);
|
|
rb_define_alloc_func(cGzipReader, rb_gzreader_s_allocate);
|
|
rb_define_method(cGzipReader, "initialize", rb_gzreader_initialize, -1);
|
|
rb_define_method(cGzipReader, "rewind", rb_gzreader_rewind, 0);
|
|
rb_define_method(cGzipReader, "unused", rb_gzreader_unused, 0);
|
|
rb_define_method(cGzipReader, "read", rb_gzreader_read, -1);
|
|
rb_define_method(cGzipReader, "readpartial", rb_gzreader_readpartial, -1);
|
|
rb_define_method(cGzipReader, "getc", rb_gzreader_getc, 0);
|
|
rb_define_method(cGzipReader, "getbyte", rb_gzreader_getbyte, 0);
|
|
rb_define_method(cGzipReader, "readchar", rb_gzreader_readchar, 0);
|
|
rb_define_method(cGzipReader, "readbyte", rb_gzreader_readbyte, 0);
|
|
rb_define_method(cGzipReader, "each_byte", rb_gzreader_each_byte, 0);
|
|
rb_define_method(cGzipReader, "each_char", rb_gzreader_each_char, 0);
|
|
rb_define_method(cGzipReader, "bytes", rb_gzreader_each_byte, 0);
|
|
rb_define_method(cGzipReader, "ungetc", rb_gzreader_ungetc, 1);
|
|
rb_define_method(cGzipReader, "ungetbyte", rb_gzreader_ungetbyte, 1);
|
|
rb_define_method(cGzipReader, "gets", rb_gzreader_gets, -1);
|
|
rb_define_method(cGzipReader, "readline", rb_gzreader_readline, -1);
|
|
rb_define_method(cGzipReader, "each", rb_gzreader_each, -1);
|
|
rb_define_method(cGzipReader, "each_line", rb_gzreader_each, -1);
|
|
rb_define_method(cGzipReader, "lines", rb_gzreader_each, -1);
|
|
rb_define_method(cGzipReader, "readlines", rb_gzreader_readlines, -1);
|
|
|
|
/* From GzipFile#os_code - code of current host */
|
|
rb_define_const(mZlib, "OS_CODE", INT2FIX(OS_CODE));
|
|
/* From GzipFile#os_code - 0x00 */
|
|
rb_define_const(mZlib, "OS_MSDOS", INT2FIX(OS_MSDOS));
|
|
/* From GzipFile#os_code - 0x01 */
|
|
rb_define_const(mZlib, "OS_AMIGA", INT2FIX(OS_AMIGA));
|
|
/* From GzipFile#os_code - 0x02 */
|
|
rb_define_const(mZlib, "OS_VMS", INT2FIX(OS_VMS));
|
|
/* From GzipFile#os_code - 0x03 */
|
|
rb_define_const(mZlib, "OS_UNIX", INT2FIX(OS_UNIX));
|
|
/* From GzipFile#os_code - 0x05 */
|
|
rb_define_const(mZlib, "OS_ATARI", INT2FIX(OS_ATARI));
|
|
/* From GzipFile#os_code - 0x06 */
|
|
rb_define_const(mZlib, "OS_OS2", INT2FIX(OS_OS2));
|
|
/* From GzipFile#os_code - 0x07 */
|
|
rb_define_const(mZlib, "OS_MACOS", INT2FIX(OS_MACOS));
|
|
/* From GzipFile#os_code - 0x0a */
|
|
rb_define_const(mZlib, "OS_TOPS20", INT2FIX(OS_TOPS20));
|
|
/* From GzipFile#os_code - 0x0b */
|
|
rb_define_const(mZlib, "OS_WIN32", INT2FIX(OS_WIN32));
|
|
|
|
/* From GzipFile#os_code - 0x04 */
|
|
rb_define_const(mZlib, "OS_VMCMS", INT2FIX(OS_VMCMS));
|
|
/* From GzipFile#os_code - 0x08 */
|
|
rb_define_const(mZlib, "OS_ZSYSTEM", INT2FIX(OS_ZSYSTEM));
|
|
/* From GzipFile#os_code - 0x09 */
|
|
rb_define_const(mZlib, "OS_CPM", INT2FIX(OS_CPM));
|
|
/* From GzipFile#os_code - 0x0c */
|
|
rb_define_const(mZlib, "OS_QDOS", INT2FIX(OS_QDOS));
|
|
/* From GzipFile#os_code - 0x0d */
|
|
rb_define_const(mZlib, "OS_RISCOS", INT2FIX(OS_RISCOS));
|
|
/* From GzipFile#os_code - 0xff */
|
|
rb_define_const(mZlib, "OS_UNKNOWN", INT2FIX(OS_UNKNOWN));
|
|
|
|
#endif /* GZIP_SUPPORT */
|
|
}
|
|
|
|
/* Document error classes. */
|
|
|
|
/*
|
|
* Document-class: Zlib::Error
|
|
*
|
|
* The superclass for all exceptions raised by Ruby/zlib.
|
|
*
|
|
* The following exceptions are defined as subclasses of Zlib::Error. These
|
|
* exceptions are raised when zlib library functions return with an error
|
|
* status.
|
|
*
|
|
* - Zlib::StreamEnd
|
|
* - Zlib::NeedDict
|
|
* - Zlib::DataError
|
|
* - Zlib::StreamError
|
|
* - Zlib::MemError
|
|
* - Zlib::BufError
|
|
* - Zlib::VersionError
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::StreamEnd
|
|
*
|
|
* Subclass of Zlib::Error
|
|
*
|
|
* When zlib returns a Z_STREAM_END
|
|
* is return if the end of the compressed data has been reached
|
|
* and all uncompressed out put has been produced.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::NeedDict
|
|
*
|
|
* Subclass of Zlib::Error
|
|
*
|
|
* When zlib returns a Z_NEED_DICT
|
|
* if a preset dictionary is needed at this point.
|
|
*
|
|
* Used by Zlib::Inflate.inflate and <tt>Zlib.inflate</tt>
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::VersionError
|
|
*
|
|
* Subclass of Zlib::Error
|
|
*
|
|
* When zlib returns a Z_VERSION_ERROR,
|
|
* usually if the zlib library version is incompatible with the
|
|
* version assumed by the caller.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::MemError
|
|
*
|
|
* Subclass of Zlib::Error
|
|
*
|
|
* When zlib returns a Z_MEM_ERROR,
|
|
* usually if there was not enough memory.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::StreamError
|
|
*
|
|
* Subclass of Zlib::Error
|
|
*
|
|
* When zlib returns a Z_STREAM_ERROR,
|
|
* usually if the stream state was inconsistent.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::BufError
|
|
*
|
|
* Subclass of Zlib::Error when zlib returns a Z_BUF_ERROR.
|
|
*
|
|
* Usually if no progress is possible.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::DataError
|
|
*
|
|
* Subclass of Zlib::Error when zlib returns a Z_DATA_ERROR.
|
|
*
|
|
* Usually if a stream was prematurely freed.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipFile::Error
|
|
*
|
|
* Base class of errors that occur when processing GZIP files.
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipFile::NoFooter
|
|
*
|
|
* Raised when gzip file footer is not found.
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipFile::CRCError
|
|
*
|
|
* Raised when the CRC checksum recorded in gzip file footer is not equivalent
|
|
* to the CRC checksum of the actual uncompressed data.
|
|
*/
|
|
|
|
/*
|
|
* Document-class: Zlib::GzipFile::LengthError
|
|
*
|
|
* Raised when the data length recorded in the gzip file footer is not equivalent
|
|
* to the length of the actual uncompressed data.
|
|
*/
|
|
|
|
|