Ruby 2.0.0p247(2013-06-27revision41674)

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transcode_data.h
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1 /**********************************************************************
2
3 transcode_data.h -
4
5 $Author: yugui $
6 created at: Mon 10 Dec 2007 14:01:47 JST 2007
7
8 Copyright (C) 2007 Martin Duerst
9
10 **********************************************************************/
11
12 #include "ruby/ruby.h"
13
14 #ifndef RUBY_TRANSCODE_DATA_H
15 #define RUBY_TRANSCODE_DATA_H 1
16
17 #if defined __GNUC__ && __GNUC__ >= 4
18 #pragma GCC visibility push(default)
19 #endif
20
21 #define WORDINDEX_SHIFT_BITS 2
22 #define WORDINDEX2INFO(widx) ((widx) << WORDINDEX_SHIFT_BITS)
23 #define INFO2WORDINDEX(info) ((info) >> WORDINDEX_SHIFT_BITS)
24 #define BYTE_LOOKUP_BASE(bl) ((bl)[0])
25 #define BYTE_LOOKUP_INFO(bl) ((bl)[1])
26
27 #define PType (unsigned int)
28
29 #define NOMAP (PType 0x01) /* direct map */
30 #define ONEbt (0x02) /* one byte payload */
31 #define TWObt (0x03) /* two bytes payload */
32 #define THREEbt (0x05) /* three bytes payload */
33 #define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */
34 #define INVALID (PType 0x07) /* invalid byte sequence */
35 #define UNDEF (PType 0x09) /* legal but undefined */
36 #define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */
37 #define FUNii (PType 0x0B) /* function from info to info */
38 #define FUNsi (PType 0x0D) /* function from start to info */
39 #define FUNio (PType 0x0E) /* function from info to output */
40 #define FUNso (PType 0x0F) /* function from start to output */
41 #define STR1 (PType 0x11) /* string 4 <= len <= 259 bytes: 1byte length + content */
42 #define GB4bt (PType 0x12) /* GB18030 four bytes payload */
43 #define FUNsio (PType 0x13) /* function from start and info to output */
44
45 #define STR1_LENGTH(byte_addr) (unsigned int)(*(byte_addr) + 4)
46 #define STR1_BYTEINDEX(w) ((w) >> 6)
47 #define makeSTR1(bi) (((bi) << 6) | STR1)
48 #define makeSTR1LEN(len) ((len)-4)
49
50 #define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt))
51 #define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|TWObt))
52 #define o3(b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|(((unsigned int)(unsigned char)(b3))<<24)|THREEbt)&0xffffffffU))
53 #define o4(b0,b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|(((unsigned char)(b3))<<24)|((((unsigned char)(b0))&0x07)<<5)|FOURbt)&0xffffffffU))
54 #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))
55 #define funsio(diff) (PType((((unsigned int)(diff))<<8)|FUNsio))
56
57 #define getBT1(a) ((unsigned char)((a)>> 8))
58 #define getBT2(a) ((unsigned char)((a)>>16))
59 #define getBT3(a) ((unsigned char)((a)>>24))
60 #define getBT0(a) (((unsigned char)((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */
61
62 #define getGB4bt0(a) ((unsigned char)((a)>> 8))
63 #define getGB4bt1(a) (((unsigned char)((a)>>24)&0x0F)|0x30)
64 #define getGB4bt2(a) ((unsigned char)((a)>>16))
65 #define getGB4bt3(a) (((unsigned char)((a)>>28)&0x0F)|0x30)
66
67 #define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii))
68
69 /* do we need these??? maybe not, can be done with simple tables */
70 #define ONETRAIL /* legal but undefined if one more trailing UTF-8 */
71 #define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */
72 #define THREETRAIL /* legal but undefined if three more trailing UTF-8 */
73
74 typedef enum {
75 asciicompat_converter, /* ASCII-compatible -> ASCII-compatible */
76 asciicompat_decoder, /* ASCII-incompatible -> ASCII-compatible */
77 asciicompat_encoder /* ASCII-compatible -> ASCII-incompatible */
78 /* ASCII-incompatible -> ASCII-incompatible is intentionally omitted. */
79 } rb_transcoder_asciicompat_type_t;
80
81 typedef struct rb_transcoder rb_transcoder;
82
83 /* static structure, one per supported encoding pair */
84 struct rb_transcoder {
85 const char *src_encoding;
86 const char *dst_encoding;
87 unsigned int conv_tree_start;
88 const unsigned char *byte_array;
89 unsigned int byte_array_length;
90 const unsigned int *word_array;
91 unsigned int word_array_length;
92 int word_size;
93 int input_unit_length;
94 int max_input;
95 int max_output;
96 rb_transcoder_asciicompat_type_t asciicompat_type;
97 size_t state_size;
98 int (*state_init_func)(void*); /* ret==0:success ret!=0:failure(errno) */
99 int (*state_fini_func)(void*); /* ret==0:success ret!=0:failure(errno) */
100 VALUE (*func_ii)(void*, VALUE); /* info -> info */
101 VALUE (*func_si)(void*, const unsigned char*, size_t); /* start -> info */
102 ssize_t (*func_io)(void*, VALUE, const unsigned char*, size_t); /* info -> output */
103 ssize_t (*func_so)(void*, const unsigned char*, size_t, unsigned char*, size_t); /* start -> output */
104 ssize_t (*finish_func)(void*, unsigned char*, size_t); /* -> output */
105 ssize_t (*resetsize_func)(void*); /* -> len */
106 ssize_t (*resetstate_func)(void*, unsigned char*, size_t); /* -> output */
107 ssize_t (*func_sio)(void*, const unsigned char*, size_t, VALUE, unsigned char*, size_t); /* start -> output */
108 };
109
110 void rb_declare_transcoder(const char *enc1, const char *enc2, const char *lib);
111 void rb_register_transcoder(const rb_transcoder *);
112
113 /*
114 * To get rid of collision of initializer symbols in statically-linked encodings
115 * and transcoders
116 */
117 #if defined(EXTSTATIC) && EXTSTATIC
118 # define TRANS_INIT(name) void Init_trans_ ## name(void)
119 #else
120 # define TRANS_INIT(name) void Init_ ## name(void)
121 #endif
122
123 #if defined __GNUC__ && __GNUC__ >= 4
124 #pragma GCC visibility pop
125 #endif
126
127 #endif /* RUBY_TRANSCODE_DATA_H */
128