diff options
Diffstat (limited to 'transcode_data.h')
| -rw-r--r-- | transcode_data.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/transcode_data.h b/transcode_data.h new file mode 100644 index 0000000000..416e50d3cc --- /dev/null +++ b/transcode_data.h @@ -0,0 +1,138 @@ +#ifndef RUBY_TRANSCODE_DATA_H +#define RUBY_TRANSCODE_DATA_H 1 +/********************************************************************** + + transcode_data.h - + + $Author$ + created at: Mon 10 Dec 2007 14:01:47 JST 2007 + + Copyright (C) 2007 Martin Duerst + +**********************************************************************/ + +#include "ruby/ruby.h" + +RUBY_SYMBOL_EXPORT_BEGIN + +#define WORDINDEX_SHIFT_BITS 2 +#define WORDINDEX2INFO(widx) ((widx) << WORDINDEX_SHIFT_BITS) +#define INFO2WORDINDEX(info) ((info) >> WORDINDEX_SHIFT_BITS) +#define BYTE_LOOKUP_BASE(bl) ((bl)[0]) +#define BYTE_LOOKUP_INFO(bl) ((bl)[1]) + +#define PType (unsigned int) + +#define NOMAP (PType 0x01) /* direct map */ +#define ONEbt (0x02) /* one byte payload */ +#define TWObt (0x03) /* two bytes payload */ +#define THREEbt (0x05) /* three bytes payload */ +#define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */ +#define INVALID (PType 0x07) /* invalid byte sequence */ +#define UNDEF (PType 0x09) /* legal but undefined */ +#define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */ +#define FUNii (PType 0x0B) /* function from info to info */ +#define FUNsi (PType 0x0D) /* function from start to info */ +#define FUNio (PType 0x0E) /* function from info to output */ +#define FUNso (PType 0x0F) /* function from start to output */ +#define STR1 (PType 0x11) /* string 4 <= len <= 259 bytes: 1byte length + content */ +#define GB4bt (PType 0x12) /* GB18030 four bytes payload */ +#define FUNsio (PType 0x13) /* function from start and info to output */ + +#define STR1_LENGTH(byte_addr) (unsigned int)(*(byte_addr) + 4) +#define STR1_BYTEINDEX(w) ((w) >> 6) +#define makeSTR1(bi) (((bi) << 6) | STR1) +#define makeSTR1LEN(len) ((len)-4) + +#define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt)) +#define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|\ + (((unsigned char)(b2))<<16)|\ + TWObt)) +#define o3(b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\ + (((unsigned char)(b2))<<16)|\ + (((unsigned int)(unsigned char)(b3))<<24)|\ + THREEbt)&\ + 0xffffffffU)) +#define o4(b0,b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\ + (((unsigned char)(b2))<<16)|\ + (((unsigned int)(unsigned char)(b3))<<24)|\ + ((((unsigned char)(b0))&0x07)<<5)|\ + FOURbt)&\ + 0xffffffffU)) +#define g4(b0,b1,b2,b3) (PType(((((unsigned char)(b0))<<8)|\ + (((unsigned char)(b2))<<16)|\ + ((((unsigned char)(b1))&0x0f)<<24)|\ + ((((unsigned int)(unsigned char)(b3))&0x0f)<<28)|\ + GB4bt)&\ + 0xffffffffU)) +#define funsio(diff) (PType((((unsigned int)(diff))<<8)|FUNsio)) + +#define getBT1(a) ((unsigned char)((a)>> 8)) +#define getBT2(a) ((unsigned char)((a)>>16)) +#define getBT3(a) ((unsigned char)((a)>>24)) +#define getBT0(a) (((unsigned char)((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */ + +#define getGB4bt0(a) ((unsigned char)((a)>> 8)) +#define getGB4bt1(a) (((unsigned char)((a)>>24)&0x0F)|0x30) +#define getGB4bt2(a) ((unsigned char)((a)>>16)) +#define getGB4bt3(a) (((unsigned char)((a)>>28)&0x0F)|0x30) + +#define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii)) + +/* do we need these??? maybe not, can be done with simple tables */ +#define ONETRAIL /* legal but undefined if one more trailing UTF-8 */ +#define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */ +#define THREETRAIL /* legal but undefined if three more trailing UTF-8 */ + +typedef enum { + asciicompat_converter, /* ASCII-compatible -> ASCII-compatible */ + asciicompat_decoder, /* ASCII-incompatible -> ASCII-compatible */ + asciicompat_encoder /* ASCII-compatible -> ASCII-incompatible */ + /* ASCII-incompatible -> ASCII-incompatible is intentionally omitted. */ +} rb_transcoder_asciicompat_type_t; + +typedef struct rb_transcoder rb_transcoder; + +/* static structure, one per supported encoding pair */ +struct rb_transcoder { + const char *src_encoding; + const char *dst_encoding; + unsigned int conv_tree_start; + const unsigned char *byte_array; + unsigned int byte_array_length; + const unsigned int *word_array; + unsigned int word_array_length; + int word_size; + int input_unit_length; + int max_input; + int max_output; + rb_transcoder_asciicompat_type_t asciicompat_type; + size_t state_size; + int (*state_init_func)(void*); /* ret==0:success ret!=0:failure(errno) */ + int (*state_fini_func)(void*); /* ret==0:success ret!=0:failure(errno) */ + VALUE (*func_ii)(void*, VALUE); /* info -> info */ + VALUE (*func_si)(void*, const unsigned char*, size_t); /* start -> info */ + ssize_t (*func_io)(void*, VALUE, const unsigned char*, size_t); /* info -> output */ + ssize_t (*func_so)(void*, const unsigned char*, size_t, unsigned char*, size_t); /* start -> output */ + ssize_t (*finish_func)(void*, unsigned char*, size_t); /* -> output */ + ssize_t (*resetsize_func)(void*); /* -> len */ + ssize_t (*resetstate_func)(void*, unsigned char*, size_t); /* -> output */ + ssize_t (*func_sio)(void*, const unsigned char*, size_t, VALUE, unsigned char*, size_t); /* start -> output */ +}; + +void rb_declare_transcoder(const char *enc1, const char *enc2, const char *lib); +void rb_register_transcoder(const rb_transcoder *); + +/* + * To get rid of collision of initializer symbols in statically-linked encodings + * and transcoders + */ +#if defined(EXTSTATIC) && EXTSTATIC +# define TRANS_INIT(name) void Init_trans_ ## name(void) +#else +# define TRANS_INIT(name) void Init_ ## name(void) +#endif + +RUBY_SYMBOL_EXPORT_END + +#endif /* RUBY_TRANSCODE_DATA_H */ |