673 lines
16 KiB
C
673 lines
16 KiB
C
/*
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* NKF - Ruby extension for Network Kanji Filter
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*
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* original nkf2.x is maintained at http://sourceforge.jp/projects/nkf/
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*
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* $Id$
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*
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*/
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#define RUBY_NKF_REVISION "$Revision$"
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#define RUBY_NKF_VERSION NKF_VERSION " (" NKF_RELEASE_DATE ")"
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#include "ruby.h"
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/* Encoding Constants */
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#define _AUTO 0
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#define _JIS 1
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#define _EUC 2
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#define _SJIS 3
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#define _BINARY 4
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#define _NOCONV 4
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#define _ASCII 5
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/* 0b011x is reserved for UTF-8 Family */
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#define _UTF8 6
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/* 0b10xx is reserved for UTF-16 Family */
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#define _UTF16 8
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/* 0b11xx is reserved for UTF-32 Family */
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#define _UTF32 12
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#define _OTHER 16
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#define _UNKNOWN _AUTO
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/* Replace nkf's getchar/putchar for variable modification */
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/* we never use getc, ungetc */
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#undef getc
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#undef ungetc
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#define getc(f) (input_ctr>=i_len?-1:input[input_ctr++])
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#define ungetc(c,f) input_ctr--
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#define INCSIZE 32
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#undef putchar
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#undef TRUE
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#undef FALSE
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#define putchar(c) rb_nkf_putchar(c)
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/* Input/Output pointers */
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static unsigned char *output;
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static unsigned char *input;
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static int input_ctr;
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static int i_len;
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static int output_ctr;
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static int o_len;
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static int incsize;
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static VALUE result;
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static int
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rb_nkf_putchar(unsigned int c)
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{
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if (output_ctr >= o_len) {
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o_len += incsize;
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rb_str_resize(result, o_len);
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incsize *= 2;
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output = (unsigned char *)RSTRING_PTR(result);
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}
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output[output_ctr++] = c;
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return c;
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}
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/* Include kanji filter main part */
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/* getchar and putchar will be replaced during inclusion */
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#define PERL_XS 1
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#include "nkf-utf8/config.h"
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#include "nkf-utf8/utf8tbl.c"
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#include "nkf-utf8/nkf.c"
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int nkf_split_options(const char *arg)
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{
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int count = 0;
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char option[256];
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int i = 0, j = 0;
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int is_escaped = FALSE;
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int is_single_quoted = FALSE;
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int is_double_quoted = FALSE;
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for(i = 0; arg[i]; i++){
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if(j == 255){
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return -1;
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}else if(is_single_quoted){
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if(arg[i] == '\''){
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is_single_quoted = FALSE;
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}else{
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option[j++] = arg[i];
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}
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}else if(is_escaped){
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is_escaped = FALSE;
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option[j++] = arg[i];
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}else if(arg[i] == '\\'){
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is_escaped = TRUE;
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}else if(is_double_quoted){
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if(arg[i] == '"'){
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is_double_quoted = FALSE;
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}else{
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option[j++] = arg[i];
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}
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}else if(arg[i] == '\''){
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is_single_quoted = TRUE;
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}else if(arg[i] == '"'){
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is_double_quoted = TRUE;
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}else if(arg[i] == ' '){
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option[j] = '\0';
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options(option);
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j = 0;
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}else{
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option[j++] = arg[i];
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}
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}
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if(j){
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option[j] = '\0';
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options(option);
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}
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return count;
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}
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/*
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* call-seq:
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* NKF.nkf(opt, str) -> string
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*
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* Convert _str_ and return converted result.
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* Conversion details are specified by _opt_ as String.
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*
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* require 'nkf'
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* output = NKF.nkf("-s", input)
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*
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* *Note*
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* By default, nkf decodes MIME encoded string.
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* If you want not to decode input, use NKF.nkf with <b>-m0</b> flag.
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*/
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static VALUE
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rb_nkf_kconv(VALUE obj, VALUE opt, VALUE src)
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{
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char *opt_ptr, *opt_end;
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volatile VALUE v;
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reinit();
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StringValue(opt);
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opt_ptr = RSTRING_PTR(opt);
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opt_end = opt_ptr + RSTRING_LEN(opt);
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nkf_split_options(opt_ptr);
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incsize = INCSIZE;
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input_ctr = 0;
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StringValue(src);
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input = (unsigned char *)RSTRING_PTR(src);
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i_len = RSTRING_LEN(src);
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result = rb_str_new(0, i_len*3 + 10);
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v = result;
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output_ctr = 0;
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output = (unsigned char *)RSTRING_PTR(result);
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o_len = RSTRING_LEN(result);
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*output = '\0';
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if(x0201_f == WISH_TRUE)
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x0201_f = ((!iso2022jp_f)? TRUE : NO_X0201);
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kanji_convert(NULL);
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rb_str_set_len(result, output_ctr);
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OBJ_INFECT(result, src);
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return result;
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}
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/*
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* call-seq:
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* NKF.guess1(str) -> integer
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*
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* Returns guessed encoding of _str_ as integer.
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*
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* Algorithm described in:
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* Ken Lunde. `Understanding Japanese Information Processing'
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* Sebastopol, CA: O'Reilly & Associates.
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*
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* case NKF.guess1(input)
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* when NKF::JIS
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* "ISO-2022-JP"
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* when NKF::SJIS
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* "Shift_JIS"
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* when NKF::EUC
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* "EUC-JP"
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* when NKF::UNKNOWN
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* "UNKNOWN(ASCII)"
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* when NKF::BINARY
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* "BINARY"
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* end
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*/
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static VALUE
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rb_nkf_guess1(VALUE obj, VALUE src)
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{
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unsigned char *p;
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unsigned char *pend;
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int sequence_counter = 0;
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StringValue(src);
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p = (unsigned char *)RSTRING_PTR(src);
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pend = p + RSTRING_LEN(src);
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if (p == pend) return INT2FIX(_UNKNOWN);
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#define INCR do {\
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p++;\
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if (p==pend) return INT2FIX(_UNKNOWN);\
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sequence_counter++;\
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if (sequence_counter % 2 == 1 && *p != 0xa4)\
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sequence_counter = 0;\
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if (6 <= sequence_counter) {\
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sequence_counter = 0;\
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return INT2FIX(_EUC);\
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}\
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} while (0)
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if (*p == 0xa4)
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sequence_counter = 1;
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while (p<pend) {
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if (*p == '\033') {
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return INT2FIX(_JIS);
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}
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if (*p < '\006' || *p == 0x7f || *p == 0xff) {
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return INT2FIX(_BINARY);
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}
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if (0x81 <= *p && *p <= 0x8d) {
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return INT2FIX(_SJIS);
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}
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if (0x8f <= *p && *p <= 0x9f) {
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return INT2FIX(_SJIS);
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}
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if (*p == 0x8e) { /* SS2 */
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INCR;
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if ((0x40 <= *p && *p <= 0x7e) ||
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(0x80 <= *p && *p <= 0xa0) ||
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(0xe0 <= *p && *p <= 0xfc))
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return INT2FIX(_SJIS);
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}
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else if (0xa1 <= *p && *p <= 0xdf) {
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INCR;
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if (0xf0 <= *p && *p <= 0xfe)
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return INT2FIX(_EUC);
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if (0xe0 <= *p && *p <= 0xef) {
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while (p < pend && *p >= 0x40) {
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if (*p >= 0x81) {
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if (*p <= 0x8d || (0x8f <= *p && *p <= 0x9f)) {
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return INT2FIX(_SJIS);
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}
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else if (0xfd <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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}
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INCR;
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}
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}
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else if (*p <= 0x9f) {
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return INT2FIX(_SJIS);
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}
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}
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else if (0xf0 <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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else if (0xe0 <= *p && *p <= 0xef) {
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INCR;
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if ((0x40 <= *p && *p <= 0x7e) ||
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(0x80 <= *p && *p <= 0xa0)) {
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return INT2FIX(_SJIS);
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}
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if (0xfd <= *p && *p <= 0xfe) {
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return INT2FIX(_EUC);
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}
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}
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INCR;
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}
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return INT2FIX(_UNKNOWN);
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}
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/*
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* call-seq:
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* NKF.guess2(str) -> integer
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*
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* Returns guessed encoding of _str_ as integer by nkf routine.
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*
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* case NKF.guess(input)
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* when NKF::ASCII
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* "ASCII"
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* when NKF::JIS
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* "ISO-2022-JP"
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* when NKF::SJIS
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* "Shift_JIS"
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* when NKF::EUC
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* "EUC-JP"
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* when NKF::UTF8
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* "UTF-8"
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* when NKF::UTF16
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* "UTF-16"
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* when NKF::UTF32
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* "UTF-32"
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* when NKF::UNKNOWN
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* "UNKNOWN"
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* when NKF::BINARY
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* "BINARY"
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* end
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*/
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static VALUE
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rb_nkf_guess2(VALUE obj, VALUE src)
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{
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int code = _BINARY;
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reinit();
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input_ctr = 0;
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StringValue(src);
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input = (unsigned char *)RSTRING_PTR(src);
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i_len = RSTRING_LEN(src);
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if(x0201_f == WISH_TRUE)
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x0201_f = ((!iso2022jp_f)? TRUE : NO_X0201);
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guess_f = TRUE;
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kanji_convert( NULL );
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guess_f = FALSE;
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if (!is_inputcode_mixed) {
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if (strcmp(input_codename, "") == 0) {
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code = _ASCII;
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} else if (strcmp(input_codename, "ISO-2022-JP") == 0) {
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code = _JIS;
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} else if (strcmp(input_codename, "EUC-JP") == 0) {
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code = _EUC;
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} else if (strcmp(input_codename, "Shift_JIS") == 0) {
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code = _SJIS;
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} else if (strcmp(input_codename, "UTF-8") == 0) {
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code = _UTF8;
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} else if (strcmp(input_codename, "UTF-16") == 0) {
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code = _UTF16;
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} else if (strcmp(input_codename, "UTF-32") == 0) {
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code = _UTF32;
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} else if (strlen(input_codename) > 0) {
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code = _UNKNOWN;
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}
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}
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return INT2FIX( code );
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}
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/*
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* NKF - Ruby extension for Network Kanji Filter
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*
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* == Description
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*
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* This is a Ruby Extension version of nkf (Netowrk Kanji Filter).
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* It converts the first argument and return converted result. Conversion
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* details are specified by flags as the first argument.
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*
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* *Nkf* is a yet another kanji code converter among networks, hosts and terminals.
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* It converts input kanji code to designated kanji code
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* such as ISO-2022-JP, Shift_JIS, EUC-JP, UTF-8 or UTF-16.
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*
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* One of the most unique faculty of *nkf* is the guess of the input kanji encodings.
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* It currently recognizes ISO-2022-JP, Shift_JIS, EUC-JP, UTF-8 and UTF-16.
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* So users needn't set the input kanji code explicitly.
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*
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* By default, X0201 kana is converted into X0208 kana.
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* For X0201 kana, SO/SI, SSO and ESC-(-I methods are supported.
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* For automatic code detection, nkf assumes no X0201 kana in Shift_JIS.
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* To accept X0201 in Shift_JIS, use <b>-X</b>, <b>-x</b> or <b>-S</b>.
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*
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* == Flags
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*
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* === -b -u
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*
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* Output is buffered (DEFAULT), Output is unbuffered.
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*
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* === -j -s -e -w -w16 -w32
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*
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* Output code is ISO-2022-JP (7bit JIS), Shift_JIS, EUC-JP,
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* UTF-8N, UTF-16BE, UTF-32BE.
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* Without this option and compile option, ISO-2022-JP is assumed.
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*
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* === -J -S -E -W -W16 -W32
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*
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* Input assumption is JIS 7 bit, Shift_JIS, EUC-JP,
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* UTF-8, UTF-16, UTF-32.
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*
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* ==== -J
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*
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* Assume JIS input. It also accepts EUC-JP.
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* This is the default. This flag does not exclude Shift_JIS.
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*
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* ==== -S
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*
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* Assume Shift_JIS and X0201 kana input. It also accepts JIS.
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* EUC-JP is recognized as X0201 kana. Without <b>-x</b> flag,
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* X0201 kana (halfwidth kana) is converted into X0208.
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*
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* ==== -E
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*
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* Assume EUC-JP input. It also accepts JIS.
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* Same as -J.
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*
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* === -t
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*
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* No conversion.
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*
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* === -i_
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*
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* Output sequence to designate JIS-kanji. (DEFAULT B)
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*
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* === -o_
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*
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* Output sequence to designate ASCII. (DEFAULT B)
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*
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* === -r
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*
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* {de/en}crypt ROT13/47
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*
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* === -h[123] --hiragana --katakana --katakana-hiragana
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*
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* [-h1 --hiragana] Katakana to Hiragana conversion.
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*
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* [-h2 --katakana] Hiragana to Katakana conversion.
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*
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* [-h3 --katakana-hiragana] Katakana to Hiragana and Hiragana to Katakana conversion.
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*
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* === -T
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*
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* Text mode output (MS-DOS)
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*
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* === -l
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*
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* ISO8859-1 (Latin-1) support
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*
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* === -f[<code>m</code> [- <code>n</code>]]
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*
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* Folding on <code>m</code> length with <code>n</code> margin in a line.
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* Without this option, fold length is 60 and fold margin is 10.
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*
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* === -F
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*
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* New line preserving line folding.
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*
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* === -Z[0-3]
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*
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* Convert X0208 alphabet (Fullwidth Alphabets) to ASCII.
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*
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* [-Z -Z0] Convert X0208 alphabet to ASCII.
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*
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* [-Z1] Converts X0208 kankaku to single ASCII space.
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*
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* [-Z2] Converts X0208 kankaku to double ASCII spaces.
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*
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* [-Z3] Replacing Fullwidth >, <, ", & into '>', '<', '"', '&' as in HTML.
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*
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* === -X -x
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*
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* Assume X0201 kana in MS-Kanji.
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* With <b>-X</b> or without this option, X0201 is converted into X0208 Kana.
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* With <b>-x</b>, try to preserve X0208 kana and do not convert X0201 kana to X0208.
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* In JIS output, ESC-(-I is used. In EUC output, SSO is used.
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*
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* === -B[0-2]
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*
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* Assume broken JIS-Kanji input, which lost ESC.
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* Useful when your site is using old B-News Nihongo patch.
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*
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* [-B1] allows any char after ESC-( or ESC-$.
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*
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* [-B2] forces ASCII after NL.
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*
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* === -I
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*
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* Replacing non iso-2022-jp char into a geta character
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* (substitute character in Japanese).
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*
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* === -d -c
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*
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* Delete \r in line feed, Add \r in line feed.
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*
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* === -m[BQN0]
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*
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* MIME ISO-2022-JP/ISO8859-1 decode. (DEFAULT)
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* To see ISO8859-1 (Latin-1) -l is necessary.
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*
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* [-mB] Decode MIME base64 encoded stream. Remove header or other part before
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* conversion.
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*
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* [-mQ] Decode MIME quoted stream. '_' in quoted stream is converted to space.
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*
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* [-mN] Non-strict decoding.
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* It allows line break in the middle of the base64 encoding.
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*
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* [-m0] No MIME decode.
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*
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* === -M
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*
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* MIME encode. Header style. All ASCII code and control characters are intact.
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* Kanji conversion is performed before encoding, so this cannot be used as a picture encoder.
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*
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* [-MB] MIME encode Base64 stream.
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*
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* [-MQ] Perfome quoted encoding.
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*
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* === -l
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*
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* Input and output code is ISO8859-1 (Latin-1) and ISO-2022-JP.
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* <b>-s</b>, <b>-e</b> and <b>-x</b> are not compatible with this option.
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*
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* === -L[uwm]
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*
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* new line mode
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* Without this option, nkf doesn't convert line breaks.
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*
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* [-Lu] unix (LF)
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*
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* [-Lw] windows (CRLF)
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*
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* [-Lm] mac (CR)
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*
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* === --fj --unix --mac --msdos --windows
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*
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* convert for these system
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*
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* === --jis --euc --sjis --mime --base64
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*
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* convert for named code
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*
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* === --jis-input --euc-input --sjis-input --mime-input --base64-input
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*
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* assume input system
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*
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* === --ic=<code>input codeset</code> --oc=<code>output codeset</code>
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*
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* Set the input or output codeset.
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* NKF supports following codesets and those codeset name are case insensitive.
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*
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* [ISO-2022-JP] a.k.a. RFC1468, 7bit JIS, JUNET
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*
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* [EUC-JP (eucJP-nkf)] a.k.a. AT&T JIS, Japanese EUC, UJIS
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*
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* [eucJP-ascii] a.k.a. x-eucjp-open-19970715-ascii
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*
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* [eucJP-ms] a.k.a. x-eucjp-open-19970715-ms
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*
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* [CP51932] Microsoft Version of EUC-JP.
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*
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* [Shift_JIS] SJIS, MS-Kanji
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*
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* [CP932] a.k.a. Windows-31J
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*
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* [UTF-8] same as UTF-8N
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*
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* [UTF-8N] UTF-8 without BOM
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*
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* [UTF-8-BOM] UTF-8 with BOM
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*
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* [UTF-16] same as UTF-16BE
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|
*
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* [UTF-16BE] UTF-16 Big Endian without BOM
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*
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* [UTF-16BE-BOM] UTF-16 Big Endian with BOM
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*
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* [UTF-16LE] UTF-16 Little Endian without BOM
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|
*
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* [UTF-16LE-BOM] UTF-16 Little Endian with BOM
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|
*
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* [UTF-32] same as UTF-32BE
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|
*
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|
* [UTF-32BE] UTF-32 Big Endian without BOM
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|
*
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|
* [UTF-32BE-BOM] UTF-32 Big Endian with BOM
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|
*
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|
* [UTF-32LE] UTF-32 Little Endian without BOM
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*
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|
* [UTF-32LE-BOM] UTF-32 Little Endian with BOM
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*
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|
* [UTF8-MAC] NKDed UTF-8, a.k.a. UTF8-NFD (input only)
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|
*
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|
* === --fb-{skip, html, xml, perl, java, subchar}
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*
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|
* Specify the way that nkf handles unassigned characters.
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|
* Without this option, --fb-skip is assumed.
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|
*
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|
* === --prefix= <code>escape character</code> <code>target character</code> ..
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|
*
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|
* When nkf converts to Shift_JIS,
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|
* nkf adds a specified escape character to specified 2nd byte of Shift_JIS characters.
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|
* 1st byte of argument is the escape character and following bytes are target characters.
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|
*
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|
* === --no-cp932ext
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|
*
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|
* Handle the characters extended in CP932 as unassigned characters.
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|
*
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|
* == --no-best-fit-chars
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|
*
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|
* When Unicode to Encoded byte conversion,
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|
* don't convert characters which is not round trip safe.
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|
* When Unicode to Unicode conversion,
|
|
* with this and -x option, nkf can be used as UTF converter.
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|
* (In other words, without this and -x option, nkf doesn't save some characters)
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|
*
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|
* When nkf convert string which related to path, you should use this opion.
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|
*
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|
* === --cap-input
|
|
*
|
|
* Decode hex encoded characters.
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|
*
|
|
* === --url-input
|
|
*
|
|
* Unescape percent escaped characters.
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|
*
|
|
* === --
|
|
*
|
|
* Ignore rest of -option.
|
|
*/
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|
|
|
void
|
|
Init_nkf()
|
|
{
|
|
/* hoge */
|
|
VALUE mKconv = rb_define_module("NKF");
|
|
/* hoge */
|
|
|
|
rb_define_module_function(mKconv, "nkf", rb_nkf_kconv, 2);
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|
rb_define_module_function(mKconv, "guess1", rb_nkf_guess1, 1);
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|
rb_define_module_function(mKconv, "guess2", rb_nkf_guess2, 1);
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|
rb_define_alias(mKconv, "guess", "guess2");
|
|
rb_define_alias(rb_singleton_class(mKconv), "guess", "guess2");
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|
|
|
/* Auto-Detect */
|
|
rb_define_const(mKconv, "AUTO", INT2FIX(_AUTO));
|
|
/* ISO-2022-JP */
|
|
rb_define_const(mKconv, "JIS", INT2FIX(_JIS));
|
|
/* EUC-JP */
|
|
rb_define_const(mKconv, "EUC", INT2FIX(_EUC));
|
|
/* Shift_JIS */
|
|
rb_define_const(mKconv, "SJIS", INT2FIX(_SJIS));
|
|
/* BINARY */
|
|
rb_define_const(mKconv, "BINARY", INT2FIX(_BINARY));
|
|
/* No conversion */
|
|
rb_define_const(mKconv, "NOCONV", INT2FIX(_NOCONV));
|
|
/* ASCII */
|
|
rb_define_const(mKconv, "ASCII", INT2FIX(_ASCII));
|
|
/* UTF-8 */
|
|
rb_define_const(mKconv, "UTF8", INT2FIX(_UTF8));
|
|
/* UTF-16 */
|
|
rb_define_const(mKconv, "UTF16", INT2FIX(_UTF16));
|
|
/* UTF-32 */
|
|
rb_define_const(mKconv, "UTF32", INT2FIX(_UTF32));
|
|
/* UNKNOWN */
|
|
rb_define_const(mKconv, "UNKNOWN", INT2FIX(_UNKNOWN));
|
|
/* Full version string of nkf */
|
|
rb_define_const(mKconv, "VERSION", rb_str_new2(RUBY_NKF_VERSION));
|
|
/* Version of nkf */
|
|
rb_define_const(mKconv, "NKF_VERSION", rb_str_new2(NKF_VERSION));
|
|
/* Release date of nkf */
|
|
rb_define_const(mKconv, "NKF_RELEASE_DATE", rb_str_new2(NKF_RELEASE_DATE));
|
|
}
|