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138 lines
5.9 KiB
C
138 lines
5.9 KiB
C
#ifndef RUBY_TRANSCODE_DATA_H
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#define RUBY_TRANSCODE_DATA_H 1
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/**********************************************************************
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transcode_data.h -
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$Author$
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created at: Mon 10 Dec 2007 14:01:47 JST 2007
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Copyright (C) 2007 Martin Duerst
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**********************************************************************/
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#include "ruby/ruby.h"
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RUBY_SYMBOL_EXPORT_BEGIN
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#define WORDINDEX_SHIFT_BITS 2
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#define WORDINDEX2INFO(widx) ((widx) << WORDINDEX_SHIFT_BITS)
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#define INFO2WORDINDEX(info) ((info) >> WORDINDEX_SHIFT_BITS)
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#define BYTE_LOOKUP_BASE(bl) ((bl)[0])
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#define BYTE_LOOKUP_INFO(bl) ((bl)[1])
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#define PType (unsigned int)
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#define NOMAP (PType 0x01) /* direct map */
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#define ONEbt (0x02) /* one byte payload */
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#define TWObt (0x03) /* two bytes payload */
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#define THREEbt (0x05) /* three bytes payload */
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#define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */
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#define INVALID (PType 0x07) /* invalid byte sequence */
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#define UNDEF (PType 0x09) /* legal but undefined */
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#define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */
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#define FUNii (PType 0x0B) /* function from info to info */
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#define FUNsi (PType 0x0D) /* function from start to info */
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#define FUNio (PType 0x0E) /* function from info to output */
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#define FUNso (PType 0x0F) /* function from start to output */
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#define STR1 (PType 0x11) /* string 4 <= len <= 259 bytes: 1byte length + content */
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#define GB4bt (PType 0x12) /* GB18030 four bytes payload */
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#define FUNsio (PType 0x13) /* function from start and info to output */
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#define STR1_LENGTH(byte_addr) (unsigned int)(*(byte_addr) + 4)
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#define STR1_BYTEINDEX(w) ((w) >> 6)
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#define makeSTR1(bi) (((bi) << 6) | STR1)
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#define makeSTR1LEN(len) ((len)-4)
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#define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt))
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#define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|\
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(((unsigned char)(b2))<<16)|\
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TWObt))
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#define o3(b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\
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(((unsigned char)(b2))<<16)|\
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(((unsigned int)(unsigned char)(b3))<<24)|\
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THREEbt)&\
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0xffffffffU))
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#define o4(b0,b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\
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(((unsigned char)(b2))<<16)|\
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(((unsigned int)(unsigned char)(b3))<<24)|\
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((((unsigned char)(b0))&0x07)<<5)|\
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FOURbt)&\
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0xffffffffU))
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#define g4(b0,b1,b2,b3) (PType(((((unsigned char)(b0))<<8)|\
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(((unsigned char)(b2))<<16)|\
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((((unsigned char)(b1))&0x0f)<<24)|\
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((((unsigned int)(unsigned char)(b3))&0x0f)<<28)|\
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GB4bt)&\
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0xffffffffU))
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#define funsio(diff) (PType((((unsigned int)(diff))<<8)|FUNsio))
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#define getBT1(a) ((unsigned char)((a)>> 8))
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#define getBT2(a) ((unsigned char)((a)>>16))
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#define getBT3(a) ((unsigned char)((a)>>24))
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#define getBT0(a) (((unsigned char)((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */
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#define getGB4bt0(a) ((unsigned char)((a)>> 8))
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#define getGB4bt1(a) (((unsigned char)((a)>>24)&0x0F)|0x30)
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#define getGB4bt2(a) ((unsigned char)((a)>>16))
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#define getGB4bt3(a) (((unsigned char)((a)>>28)&0x0F)|0x30)
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#define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii))
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/* do we need these??? maybe not, can be done with simple tables */
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#define ONETRAIL /* legal but undefined if one more trailing UTF-8 */
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#define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */
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#define THREETRAIL /* legal but undefined if three more trailing UTF-8 */
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typedef enum {
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asciicompat_converter, /* ASCII-compatible -> ASCII-compatible */
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asciicompat_decoder, /* ASCII-incompatible -> ASCII-compatible */
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asciicompat_encoder /* ASCII-compatible -> ASCII-incompatible */
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/* ASCII-incompatible -> ASCII-incompatible is intentionally omitted. */
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} rb_transcoder_asciicompat_type_t;
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typedef struct rb_transcoder rb_transcoder;
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/* static structure, one per supported encoding pair */
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struct rb_transcoder {
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const char *src_encoding;
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const char *dst_encoding;
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unsigned int conv_tree_start;
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const unsigned char *byte_array;
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unsigned int byte_array_length;
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const unsigned int *word_array;
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unsigned int word_array_length;
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int word_size;
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int input_unit_length;
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int max_input;
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int max_output;
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rb_transcoder_asciicompat_type_t asciicompat_type;
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size_t state_size;
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int (*state_init_func)(void*); /* ret==0:success ret!=0:failure(errno) */
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int (*state_fini_func)(void*); /* ret==0:success ret!=0:failure(errno) */
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VALUE (*func_ii)(void*, VALUE); /* info -> info */
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VALUE (*func_si)(void*, const unsigned char*, size_t); /* start -> info */
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ssize_t (*func_io)(void*, VALUE, const unsigned char*, size_t); /* info -> output */
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ssize_t (*func_so)(void*, const unsigned char*, size_t, unsigned char*, size_t); /* start -> output */
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ssize_t (*finish_func)(void*, unsigned char*, size_t); /* -> output */
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ssize_t (*resetsize_func)(void*); /* -> len */
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ssize_t (*resetstate_func)(void*, unsigned char*, size_t); /* -> output */
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ssize_t (*func_sio)(void*, const unsigned char*, size_t, VALUE, unsigned char*, size_t); /* start -> output */
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};
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void rb_declare_transcoder(const char *enc1, const char *enc2, const char *lib);
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void rb_register_transcoder(const rb_transcoder *);
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/*
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* To get rid of collision of initializer symbols in statically-linked encodings
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* and transcoders
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*/
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#if defined(EXTSTATIC) && EXTSTATIC
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# define TRANS_INIT(name) void Init_trans_ ## name(void)
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#else
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# define TRANS_INIT(name) void Init_ ## name(void)
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#endif
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RUBY_SYMBOL_EXPORT_END
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#endif /* RUBY_TRANSCODE_DATA_H */
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