Ruby  3.4.0dev (2024-11-05 revision 348a53415339076afc4a02fcd09f3ae36e9c4c61)
transcode_data.h (348a53415339076afc4a02fcd09f3ae36e9c4c61)
1 #ifndef RUBY_TRANSCODE_DATA_H
2 #define RUBY_TRANSCODE_DATA_H 1
3 /**********************************************************************
4 
5  transcode_data.h -
6 
7  $Author$
8  created at: Mon 10 Dec 2007 14:01:47 JST 2007
9 
10  Copyright (C) 2007 Martin Duerst
11 
12 **********************************************************************/
13 
14 #include "ruby/ruby.h"
15 
16 RUBY_SYMBOL_EXPORT_BEGIN
17 
18 #define WORDINDEX_SHIFT_BITS 2
19 #define WORDINDEX2INFO(widx) ((widx) << WORDINDEX_SHIFT_BITS)
20 #define INFO2WORDINDEX(info) ((info) >> WORDINDEX_SHIFT_BITS)
21 #define BYTE_LOOKUP_BASE(bl) ((bl)[0])
22 #define BYTE_LOOKUP_INFO(bl) ((bl)[1])
23 
24 #define PType (unsigned int)
25 
26 #define NOMAP (PType 0x01) /* direct map */
27 #define ONEbt (0x02) /* one byte payload */
28 #define TWObt (0x03) /* two bytes payload */
29 #define THREEbt (0x05) /* three bytes payload */
30 #define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */
31 #define INVALID (PType 0x07) /* invalid byte sequence */
32 #define UNDEF (PType 0x09) /* legal but undefined */
33 #define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */
34 #define FUNii (PType 0x0B) /* function from info to info */
35 #define FUNsi (PType 0x0D) /* function from start to info */
36 #define FUNio (PType 0x0E) /* function from info to output */
37 #define FUNso (PType 0x0F) /* function from start to output */
38 #define STR1 (PType 0x11) /* string 4 <= len <= 259 bytes: 1byte length + content */
39 #define GB4bt (PType 0x12) /* GB18030 four bytes payload */
40 #define FUNsio (PType 0x13) /* function from start and info to output */
41 
42 #define STR1_LENGTH(byte_addr) (unsigned int)(*(byte_addr) + 4)
43 #define STR1_BYTEINDEX(w) ((w) >> 6)
44 #define makeSTR1(bi) (((bi) << 6) | STR1)
45 #define makeSTR1LEN(len) ((len)-4)
46 
47 #define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt))
48 #define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|\
49  (((unsigned char)(b2))<<16)|\
50  TWObt))
51 #define o3(b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\
52  (((unsigned char)(b2))<<16)|\
53  (((unsigned int)(unsigned char)(b3))<<24)|\
54  THREEbt)&\
55  0xffffffffU))
56 #define o4(b0,b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|\
57  (((unsigned char)(b2))<<16)|\
58  (((unsigned int)(unsigned char)(b3))<<24)|\
59  ((((unsigned char)(b0))&0x07)<<5)|\
60  FOURbt)&\
61  0xffffffffU))
62 #define g4(b0,b1,b2,b3) (PType(((((unsigned char)(b0))<<8)|\
63  (((unsigned char)(b2))<<16)|\
64  ((((unsigned char)(b1))&0x0f)<<24)|\
65  ((((unsigned int)(unsigned char)(b3))&0x0f)<<28)|\
66  GB4bt)&\
67  0xffffffffU))
68 #define funsio(diff) (PType((((unsigned int)(diff))<<8)|FUNsio))
69 
70 #define getBT1(a) ((unsigned char)((a)>> 8))
71 #define getBT2(a) ((unsigned char)((a)>>16))
72 #define getBT3(a) ((unsigned char)((a)>>24))
73 #define getBT0(a) (((unsigned char)((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */
74 
75 #define getGB4bt0(a) ((unsigned char)((a)>> 8))
76 #define getGB4bt1(a) (((unsigned char)((a)>>24)&0x0F)|0x30)
77 #define getGB4bt2(a) ((unsigned char)((a)>>16))
78 #define getGB4bt3(a) (((unsigned char)((a)>>28)&0x0F)|0x30)
79 
80 #define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii))
81 
82 /* do we need these??? maybe not, can be done with simple tables */
83 #define ONETRAIL /* legal but undefined if one more trailing UTF-8 */
84 #define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */
85 #define THREETRAIL /* legal but undefined if three more trailing UTF-8 */
86 
87 typedef enum {
88  asciicompat_converter, /* ASCII-compatible -> ASCII-compatible */
89  asciicompat_decoder, /* ASCII-incompatible -> ASCII-compatible */
90  asciicompat_encoder /* ASCII-compatible -> ASCII-incompatible */
91  /* ASCII-incompatible -> ASCII-incompatible is intentionally omitted. */
92 } rb_transcoder_asciicompat_type_t;
93 
94 typedef struct rb_transcoder rb_transcoder;
95 
96 /* static structure, one per supported encoding pair */
97 struct rb_transcoder {
98  const char *src_encoding;
99  const char *dst_encoding;
100  unsigned int conv_tree_start;
101  const unsigned char *byte_array;
102  unsigned int byte_array_length;
103  const unsigned int *word_array;
104  unsigned int word_array_length;
105  int word_size;
106  int input_unit_length;
107  int max_input;
108  int max_output;
109  rb_transcoder_asciicompat_type_t asciicompat_type;
110  size_t state_size;
111  int (*state_init_func)(void*); /* ret==0:success ret!=0:failure(errno) */
112  int (*state_fini_func)(void*); /* ret==0:success ret!=0:failure(errno) */
113  VALUE (*func_ii)(void*, VALUE); /* info -> info */
114  VALUE (*func_si)(void*, const unsigned char*, size_t); /* start -> info */
115  ssize_t (*func_io)(void*, VALUE, const unsigned char*, size_t); /* info -> output */
116  ssize_t (*func_so)(void*, const unsigned char*, size_t, unsigned char*, size_t); /* start -> output */
117  ssize_t (*finish_func)(void*, unsigned char*, size_t); /* -> output */
118  ssize_t (*resetsize_func)(void*); /* -> len */
119  ssize_t (*resetstate_func)(void*, unsigned char*, size_t); /* -> output */
120  ssize_t (*func_sio)(void*, const unsigned char*, size_t, VALUE, unsigned char*, size_t); /* start -> output */
121 };
122 
123 void rb_declare_transcoder(const char *enc1, const char *enc2, const char *lib);
124 void rb_register_transcoder(const rb_transcoder *);
125 
126 /*
127  * To get rid of collision of initializer symbols in statically-linked encodings
128  * and transcoders
129  */
130 #if defined(EXTSTATIC) && EXTSTATIC
131 # define TRANS_INIT(name) void Init_trans_ ## name(void)
132 #else
133 # define TRANS_INIT(name) void Init_ ## name(void)
134 #endif
135 
136 RUBY_SYMBOL_EXPORT_END
137 
138 #endif /* RUBY_TRANSCODE_DATA_H */
rb_transcoder
Definition: transcode_data.h:97
VALUE
uintptr_t VALUE
Type that represents a Ruby object.
Definition: value.h:40
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