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100644 413 lines (362 sloc) 12.394 kB
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1 /*
2 * MacRuby implementation of Ruby 1.9 String.
3 *
4 * This file is covered by the Ruby license. See COPYING for more details.
5 *
6 * Copyright (C) 2007-2010, Apple Inc. All rights reserved.
7 * Copyright (C) 1993-2007 Yukihiro Matsumoto
8 * Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
9 * Copyright (C) 2000 Information-technology Promotion Agency, Japan
10 */
11
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12 #include <string.h>
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13
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14 #include "ruby.h"
15 #include "ruby/encoding.h"
16 #include "encoding.h"
17
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18 VALUE rb_cEncoding;
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19
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20 static rb_encoding_t *default_internal = NULL;
21 static rb_encoding_t *default_external = NULL;
22 rb_encoding_t *rb_encodings[ENCODINGS_COUNT];
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23
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24 static void str_undefined_update_flags(rb_str_t *self) { abort(); }
25 static void str_undefined_make_data_binary(rb_str_t *self) { abort(); }
26 static bool str_undefined_try_making_data_uchars(rb_str_t *self) { abort(); }
27 static long str_undefined_length(rb_str_t *self, bool ucs2_mode) { abort(); }
28 static long str_undefined_bytesize(rb_str_t *self) { abort(); }
29 static character_boundaries_t str_undefined_get_character_boundaries(rb_str_t *self, long index, bool ucs2_mode) { abort(); }
30 static long str_undefined_offset_in_bytes_to_index(rb_str_t *self, long offset_in_bytes, bool ucs2_mode) { abort(); }
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31
32 static VALUE
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33 mr_enc_s_list(VALUE klass, SEL sel)
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34 {
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35 VALUE ary = rb_ary_new2(ENCODINGS_COUNT);
36 for (unsigned int i = 0; i < ENCODINGS_COUNT; ++i) {
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37 rb_ary_push(ary, (VALUE)rb_encodings[i]);
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38 }
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39 return ary;
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40 }
41
42 static VALUE
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43 mr_enc_s_name_list(VALUE klass, SEL sel)
44 {
45 VALUE ary = rb_ary_new();
46 for (unsigned int i = 0; i < ENCODINGS_COUNT; ++i) {
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47 rb_encoding_t *encoding = RENC(rb_encodings[i]);
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48 // TODO: use US-ASCII strings
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49 rb_ary_push(ary, rb_usascii_str_new2(encoding->public_name));
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50 for (unsigned int j = 0; j < encoding->aliases_count; ++j) {
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51 rb_ary_push(ary, rb_usascii_str_new2(encoding->aliases[j]));
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52 }
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53 }
54 return ary;
55 }
56
57 static VALUE
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58 mr_enc_s_aliases(VALUE klass, SEL sel)
59 {
60 VALUE hash = rb_hash_new();
61 for (unsigned int i = 0; i < ENCODINGS_COUNT; ++i) {
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62 rb_encoding_t *encoding = RENC(rb_encodings[i]);
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63 for (unsigned int j = 0; j < encoding->aliases_count; ++j) {
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64 rb_hash_aset(hash, rb_usascii_str_new2(encoding->aliases[j]),
65 rb_usascii_str_new2(encoding->public_name));
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66 }
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67 }
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68 return hash;
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69 }
70
71 static VALUE
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72 mr_enc_s_find(VALUE klass, SEL sel, VALUE name)
73 {
74 StringValue(name);
75 rb_encoding_t *enc = rb_enc_find(RSTRING_PTR(name));
76 if (enc == NULL) {
77 rb_raise(rb_eArgError, "unknown encoding name - %s",
78 RSTRING_PTR(name));
79 }
80 return (VALUE)enc;
81 }
82
83 static VALUE
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84 mr_enc_s_default_internal(VALUE klass, SEL sel)
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85 {
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86 return (VALUE)default_internal;
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87 }
88
89 static VALUE
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90 mr_enc_set_default_internal(VALUE klass, SEL sel, VALUE enc)
91 {
92 default_internal = rb_to_encoding(enc);
93 return (VALUE)default_internal;
94 }
95
96 static VALUE
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97 mr_enc_s_default_external(VALUE klass, SEL sel)
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98 {
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99 return (VALUE)default_external;
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100 }
101
102 static VALUE
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103 mr_enc_set_default_external(VALUE klass, SEL sel, VALUE enc)
104 {
105 default_external = rb_to_encoding(enc);
106 return (VALUE)default_external;
107 }
108
109 static VALUE
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110 mr_enc_name(VALUE self, SEL sel)
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111 {
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112 return rb_usascii_str_new2(RENC(self)->public_name);
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113 }
114
115 static VALUE
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116 mr_enc_inspect(VALUE self, SEL sel)
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117 {
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118 return rb_sprintf("#<%s:%s>", rb_obj_classname(self),
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119 RENC(self)->public_name);
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120 }
121
122 static VALUE
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123 mr_enc_names(VALUE self, SEL sel)
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124 {
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125 rb_encoding_t *encoding = RENC(self);
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126
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127 VALUE ary = rb_ary_new2(encoding->aliases_count + 1);
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128 rb_ary_push(ary, rb_usascii_str_new2(encoding->public_name));
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129 for (unsigned int i = 0; i < encoding->aliases_count; ++i) {
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130 rb_ary_push(ary, rb_usascii_str_new2(encoding->aliases[i]));
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131 }
132 return ary;
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133 }
134
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135 static VALUE
136 mr_enc_ascii_compatible_p(VALUE self, SEL sel)
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137 {
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138 return RENC(self)->ascii_compatible ? Qtrue : Qfalse;
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139 }
140
141 static VALUE
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142 mr_enc_dummy_p(VALUE self, SEL sel)
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143 {
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144 return Qfalse;
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145 }
146
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147 static void
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148 define_encoding_constant(const char *name, rb_encoding_t *encoding)
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149 {
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150 char c = name[0];
151 if ((c >= '0') && (c <= '9')) {
152 // constants can't start with a number
153 return;
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154 }
155
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156 char *name_copy = strdup(name);
157 if ((c >= 'a') && (c <= 'z')) {
158 // the first character must be upper case
159 name_copy[0] = c - ('a' - 'A');
160 }
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161
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162 // '.' and '-' must be transformed into '_'
163 for (int i = 0; name_copy[i]; ++i) {
164 if ((name_copy[i] == '.') || (name_copy[i] == '-')) {
165 name_copy[i] = '_';
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166 }
167 }
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168 rb_define_const(rb_cEncoding, name_copy, (VALUE)encoding);
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169 free(name_copy);
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170 }
171
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172 extern void enc_init_ucnv_encoding(rb_encoding_t *encoding);
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173
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174 enum {
175 ENCODING_TYPE_SPECIAL = 0,
176 ENCODING_TYPE_UCNV
177 };
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178
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179 static void
180 add_encoding(
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181 unsigned int encoding_index, // index of the encoding in the encodings
182 // array
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183 unsigned int rb_encoding_type,
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184 const char *public_name, // public name for the encoding
185 unsigned char min_char_size,
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186 bool single_byte_encoding, // in the encoding a character takes only
187 // one byte
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188 bool ascii_compatible, // is the encoding ASCII compatible or not
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189 ... // aliases for the encoding (should no include the public name)
190 // - must end with a NULL
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191 )
192 {
193 assert(encoding_index < ENCODINGS_COUNT);
194
195 // create an array for the aliases
196 unsigned int aliases_count = 0;
197 va_list va_aliases;
198 va_start(va_aliases, ascii_compatible);
199 while (va_arg(va_aliases, const char *) != NULL) {
200 ++aliases_count;
201 }
202 va_end(va_aliases);
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203 const char **aliases = (const char **)
204 malloc(sizeof(const char *) * aliases_count);
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205 va_start(va_aliases, ascii_compatible);
206 for (unsigned int i = 0; i < aliases_count; ++i) {
207 aliases[i] = va_arg(va_aliases, const char *);
208 }
209 va_end(va_aliases);
210
211 // create the MacRuby object
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212 NEWOBJ(encoding, rb_encoding_t);
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213 encoding->basic.flags = 0;
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214 encoding->basic.klass = rb_cEncoding;
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215 rb_encodings[encoding_index] = encoding;
216 GC_RETAIN(encoding); // it should never be deallocated
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217
218 // fill the fields
219 encoding->index = encoding_index;
220 encoding->public_name = public_name;
221 encoding->min_char_size = min_char_size;
222 encoding->single_byte_encoding = single_byte_encoding;
223 encoding->ascii_compatible = ascii_compatible;
224 encoding->aliases_count = aliases_count;
225 encoding->aliases = aliases;
226
227 // fill the default implementations with aborts
228 encoding->methods.update_flags = str_undefined_update_flags;
229 encoding->methods.make_data_binary = str_undefined_make_data_binary;
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230 encoding->methods.try_making_data_uchars =
231 str_undefined_try_making_data_uchars;
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232 encoding->methods.length = str_undefined_length;
233 encoding->methods.bytesize = str_undefined_bytesize;
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234 encoding->methods.get_character_boundaries =
235 str_undefined_get_character_boundaries;
236 encoding->methods.offset_in_bytes_to_index =
237 str_undefined_offset_in_bytes_to_index;
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238
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239 switch (rb_encoding_type) {
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240 case ENCODING_TYPE_SPECIAL:
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241 break;
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242 case ENCODING_TYPE_UCNV:
243 enc_init_ucnv_encoding(encoding);
244 break;
245 default:
246 abort();
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247 }
248 }
249
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250 // This Init function is called very early. Do not use any runtime method
251 // because things may not be initialized properly yet.
252 void
253 Init_PreEncoding(void)
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254 {
255 add_encoding(ENCODING_BINARY, ENCODING_TYPE_SPECIAL, "ASCII-8BIT", 1, true, true, "BINARY", NULL);
256 add_encoding(ENCODING_ASCII, ENCODING_TYPE_UCNV, "US-ASCII", 1, true, true, "ASCII", "ANSI_X3.4-1968", "646", NULL);
257 add_encoding(ENCODING_UTF8, ENCODING_TYPE_UCNV, "UTF-8", 1, false, true, "CP65001", NULL);
258 add_encoding(ENCODING_UTF16BE, ENCODING_TYPE_UCNV, "UTF-16BE", 2, false, false, NULL);
259 add_encoding(ENCODING_UTF16LE, ENCODING_TYPE_UCNV, "UTF-16LE", 2, false, false, NULL);
260 add_encoding(ENCODING_UTF32BE, ENCODING_TYPE_UCNV, "UTF-32BE", 4, false, false, "UCS-4BE", NULL);
261 add_encoding(ENCODING_UTF32LE, ENCODING_TYPE_UCNV, "UTF-32LE", 4, false, false, "UCS-4LE", NULL);
262 add_encoding(ENCODING_ISO8859_1, ENCODING_TYPE_UCNV, "ISO-8859-1", 1, true, true, "ISO8859-1", NULL);
263 add_encoding(ENCODING_MACROMAN, ENCODING_TYPE_UCNV, "macRoman", 1, true, true, NULL);
264 // FIXME: the ICU conversion tables do not seem to match Ruby's Japanese conversion tables
265 //add_encoding(ENCODING_EUCJP, ENCODING_TYPE_RUBY, "EUC-JP", 1, false, true, "eucJP", NULL);
266 //add_encoding(ENCODING_SJIS, ENCODING_TYPE_RUBY, "Shift_JIS", 1, false, true, "SJIS", NULL);
267 //add_encoding(ENCODING_CP932, ENCODING_TYPE_RUBY, "Windows-31J", 1, false, true, "CP932", "csWindows31J", NULL);
268
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269 default_external = rb_encodings[ENCODING_UTF8];
270 default_internal = rb_encodings[ENCODING_UTF8];
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271 }
272
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273 void
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274 Init_Encoding(void)
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275 {
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276 // rb_cEncoding is defined earlier in Init_PreVM().
277 rb_set_class_path(rb_cEncoding, rb_cObject, "Encoding");
278 rb_const_set(rb_cObject, rb_intern("Encoding"), rb_cEncoding);
279
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280 rb_undef_alloc_func(rb_cEncoding);
281
282 rb_objc_define_method(rb_cEncoding, "to_s", mr_enc_name, 0);
283 rb_objc_define_method(rb_cEncoding, "inspect", mr_enc_inspect, 0);
284 rb_objc_define_method(rb_cEncoding, "name", mr_enc_name, 0);
285 rb_objc_define_method(rb_cEncoding, "names", mr_enc_names, 0);
286 rb_objc_define_method(rb_cEncoding, "dummy?", mr_enc_dummy_p, 0);
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287 rb_objc_define_method(rb_cEncoding, "ascii_compatible?",
288 mr_enc_ascii_compatible_p, 0);
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289 rb_objc_define_method(*(VALUE *)rb_cEncoding, "list", mr_enc_s_list, 0);
290 rb_objc_define_method(*(VALUE *)rb_cEncoding, "name_list",
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291 mr_enc_s_name_list, 0);
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292 rb_objc_define_method(*(VALUE *)rb_cEncoding, "aliases",
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293 mr_enc_s_aliases, 0);
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294 rb_objc_define_method(*(VALUE *)rb_cEncoding, "find", mr_enc_s_find, 1);
295 rb_objc_define_method(*(VALUE *)rb_cEncoding, "compatible?",
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296 mr_enc_s_is_compatible, 2); // in string.c
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297
298 //rb_define_method(rb_cEncoding, "_dump", enc_dump, -1);
299 //rb_define_singleton_method(rb_cEncoding, "_load", enc_load, 1);
300
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301 rb_objc_define_method(*(VALUE *)rb_cEncoding, "default_external",
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302 mr_enc_s_default_external, 0);
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303 rb_objc_define_method(*(VALUE *)rb_cEncoding, "default_external=",
304 mr_enc_set_default_external, 1);
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305 rb_objc_define_method(*(VALUE *)rb_cEncoding, "default_internal",
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306 mr_enc_s_default_internal, 0);
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307 rb_objc_define_method(*(VALUE *)rb_cEncoding, "default_internal=",
308 mr_enc_set_default_internal, 1);
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309 //rb_define_singleton_method(rb_cEncoding, "locale_charmap", rb_locale_charmap, 0);
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310
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311 // Create constants.
312 for (unsigned int i = 0; i < ENCODINGS_COUNT; i++) {
313 rb_encoding_t *enc = rb_encodings[i];
314 define_encoding_constant(enc->public_name, enc);
315 for (unsigned int j = 0; j < enc->aliases_count; j++) {
316 define_encoding_constant(enc->aliases[j], enc);
317 }
318 }
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319 }
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320
321 // MRI C-API compatibility.
322
323 rb_encoding_t *
324 rb_enc_find(const char *name)
325 {
326 for (unsigned int i = 0; i < ENCODINGS_COUNT; i++) {
327 rb_encoding_t *enc = rb_encodings[i];
328 if (strcasecmp(enc->public_name, name) == 0) {
329 return enc;
330 }
331 for (unsigned int j = 0; j < enc->aliases_count; j++) {
332 const char *alias = enc->aliases[j];
333 if (strcasecmp(alias, name) == 0) {
334 return enc;
335 }
336 }
337 }
338 return NULL;
339 }
340
341 VALUE
342 rb_enc_from_encoding(rb_encoding_t *enc)
343 {
344 return (VALUE)enc;
345 }
346
347 rb_encoding_t *
348 rb_enc_get(VALUE obj)
349 {
350 if (IS_RSTR(obj)) {
351 return RSTR(obj)->encoding;
352 }
353 // TODO support symbols
354 return NULL;
355 }
356
357 rb_encoding_t *
358 rb_to_encoding(VALUE obj)
359 {
360 rb_encoding_t *enc;
361 if (CLASS_OF(obj) == rb_cEncoding) {
362 enc = RENC(obj);
363 }
364 else {
365 StringValue(obj);
366 enc = rb_enc_find(RSTRING_PTR(obj));
367 if (enc == NULL) {
368 rb_raise(rb_eArgError, "unknown encoding name - %s",
369 RSTRING_PTR(obj));
370 }
371 }
372 return enc;
373 }
374
375 const char *
376 rb_enc_name(rb_encoding_t *enc)
377 {
378 return RENC(enc)->public_name;
379 }
380
381 VALUE
382 rb_enc_name2(rb_encoding_t *enc)
383 {
384 return rb_usascii_str_new2(rb_enc_name(enc));
385 }
386
387 long
388 rb_enc_mbminlen(rb_encoding_t *enc)
389 {
390 return enc->min_char_size;
391 }
392
393 long
394 rb_enc_mbmaxlen(rb_encoding_t *enc)
395 {
396 return enc->single_byte_encoding ? 1 : 10; // XXX 10?
397 }
398
399 rb_encoding_t *
400 rb_locale_encoding(void)
401 {
402 // XXX
403 return rb_encodings[ENCODING_UTF8];
404 }
405
406 void
407 rb_enc_set_default_external(VALUE encoding)
408 {
409 assert(CLASS_OF(encoding) == rb_cEncoding);
410 default_external = RENC(encoding);
411 }
412
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