1 /*------------------------------------------------------------------------- 2 * 3 * pg_wchar.h 4 * multibyte-character support 5 * 6 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group 7 * Portions Copyright (c) 1994, Regents of the University of California 8 * 9 * src/include/mb/pg_wchar.h 10 * 11 * NOTES 12 * This is used both by the backend and by libpq, but should not be 13 * included by libpq client programs. In particular, a libpq client 14 * should not assume that the encoding IDs used by the version of libpq 15 * it's linked to match up with the IDs declared here. 16 * 17 *------------------------------------------------------------------------- 18 */ 19 #ifndef PG_WCHAR_H 20 #define PG_WCHAR_H 21 22 /* 23 * The pg_wchar type 24 */ 25 typedef unsigned int pg_wchar; 26 27 /* 28 * Maximum byte length of multibyte characters in any backend encoding 29 */ 30 #define MAX_MULTIBYTE_CHAR_LEN 4 31 32 /* 33 * various definitions for EUC 34 */ 35 #define SS2 0x8e /* single shift 2 (JIS0201) */ 36 #define SS3 0x8f /* single shift 3 (JIS0212) */ 37 38 /* 39 * SJIS validation macros 40 */ 41 #define ISSJISHEAD(c) (((c) >= 0x81 && (c) <= 0x9f) || ((c) >= 0xe0 && (c) <= 0xfc)) 42 #define ISSJISTAIL(c) (((c) >= 0x40 && (c) <= 0x7e) || ((c) >= 0x80 && (c) <= 0xfc)) 43 44 /*---------------------------------------------------- 45 * MULE Internal Encoding (MIC) 46 * 47 * This encoding follows the design used within XEmacs; it is meant to 48 * subsume many externally-defined character sets. Each character includes 49 * identification of the character set it belongs to, so the encoding is 50 * general but somewhat bulky. 51 * 52 * Currently PostgreSQL supports 5 types of MULE character sets: 53 * 54 * 1) 1-byte ASCII characters. Each byte is below 0x80. 55 * 56 * 2) "Official" single byte charsets such as ISO-8859-1 (Latin1). 57 * Each MULE character consists of 2 bytes: LC1 + C1, where LC1 is 58 * an identifier for the charset (in the range 0x81 to 0x8d) and C1 59 * is the character code (in the range 0xa0 to 0xff). 60 * 61 * 3) "Private" single byte charsets such as SISHENG. Each MULE 62 * character consists of 3 bytes: LCPRV1 + LC12 + C1, where LCPRV1 63 * is a private-charset flag, LC12 is an identifier for the charset, 64 * and C1 is the character code (in the range 0xa0 to 0xff). 65 * LCPRV1 is either 0x9a (if LC12 is in the range 0xa0 to 0xdf) 66 * or 0x9b (if LC12 is in the range 0xe0 to 0xef). 67 * 68 * 4) "Official" multibyte charsets such as JIS X0208. Each MULE 69 * character consists of 3 bytes: LC2 + C1 + C2, where LC2 is 70 * an identifier for the charset (in the range 0x90 to 0x99) and C1 71 * and C2 form the character code (each in the range 0xa0 to 0xff). 72 * 73 * 5) "Private" multibyte charsets such as CNS 11643-1992 Plane 3. 74 * Each MULE character consists of 4 bytes: LCPRV2 + LC22 + C1 + C2, 75 * where LCPRV2 is a private-charset flag, LC22 is an identifier for 76 * the charset, and C1 and C2 form the character code (each in the range 77 * 0xa0 to 0xff). LCPRV2 is either 0x9c (if LC22 is in the range 0xf0 78 * to 0xf4) or 0x9d (if LC22 is in the range 0xf5 to 0xfe). 79 * 80 * "Official" encodings are those that have been assigned code numbers by 81 * the XEmacs project; "private" encodings have Postgres-specific charset 82 * identifiers. 83 * 84 * See the "XEmacs Internals Manual", available at http://www.xemacs.org, 85 * for more details. Note that for historical reasons, Postgres' 86 * private-charset flag values do not match what XEmacs says they should be, 87 * so this isn't really exactly MULE (not that private charsets would be 88 * interoperable anyway). 89 * 90 * Note that XEmacs's implementation is different from what emacs does. 91 * We follow emacs's implementation, rather than XEmacs's. 92 *---------------------------------------------------- 93 */ 94 95 /* 96 * Charset identifiers (also called "leading bytes" in the MULE documentation) 97 */ 98 99 /* 100 * Charset IDs for official single byte encodings (0x81-0x8e) 101 */ 102 #define LC_ISO8859_1 0x81 /* ISO8859 Latin 1 */ 103 #define LC_ISO8859_2 0x82 /* ISO8859 Latin 2 */ 104 #define LC_ISO8859_3 0x83 /* ISO8859 Latin 3 */ 105 #define LC_ISO8859_4 0x84 /* ISO8859 Latin 4 */ 106 #define LC_TIS620 0x85 /* Thai (not supported yet) */ 107 #define LC_ISO8859_7 0x86 /* Greek (not supported yet) */ 108 #define LC_ISO8859_6 0x87 /* Arabic (not supported yet) */ 109 #define LC_ISO8859_8 0x88 /* Hebrew (not supported yet) */ 110 #define LC_JISX0201K 0x89 /* Japanese 1 byte kana */ 111 #define LC_JISX0201R 0x8a /* Japanese 1 byte Roman */ 112 /* Note that 0x8b seems to be unused as of Emacs 20.7. 113 * However, there might be a chance that 0x8b could be used 114 * in later versions of Emacs. 115 */ 116 #define LC_KOI8_R 0x8b /* Cyrillic KOI8-R */ 117 #define LC_ISO8859_5 0x8c /* ISO8859 Cyrillic */ 118 #define LC_ISO8859_9 0x8d /* ISO8859 Latin 5 (not supported yet) */ 119 #define LC_ISO8859_15 0x8e /* ISO8859 Latin 15 (not supported yet) */ 120 /* #define CONTROL_1 0x8f control characters (unused) */ 121 122 /* Is a leading byte for "official" single byte encodings? */ 123 #define IS_LC1(c) ((unsigned char)(c) >= 0x81 && (unsigned char)(c) <= 0x8d) 124 125 /* 126 * Charset IDs for official multibyte encodings (0x90-0x99) 127 * 0x9a-0x9d are free. 0x9e and 0x9f are reserved. 128 */ 129 #define LC_JISX0208_1978 0x90 /* Japanese Kanji, old JIS (not supported) */ 130 #define LC_GB2312_80 0x91 /* Chinese */ 131 #define LC_JISX0208 0x92 /* Japanese Kanji (JIS X 0208) */ 132 #define LC_KS5601 0x93 /* Korean */ 133 #define LC_JISX0212 0x94 /* Japanese Kanji (JIS X 0212) */ 134 #define LC_CNS11643_1 0x95 /* CNS 11643-1992 Plane 1 */ 135 #define LC_CNS11643_2 0x96 /* CNS 11643-1992 Plane 2 */ 136 #define LC_JISX0213_1 0x97 /* Japanese Kanji (JIS X 0213 Plane 1) 137 * (not supported) */ 138 #define LC_BIG5_1 0x98 /* Plane 1 Chinese traditional (not 139 * supported) */ 140 #define LC_BIG5_2 0x99 /* Plane 1 Chinese traditional (not 141 * supported) */ 142 143 /* Is a leading byte for "official" multibyte encodings? */ 144 #define IS_LC2(c) ((unsigned char)(c) >= 0x90 && (unsigned char)(c) <= 0x99) 145 146 /* 147 * Postgres-specific prefix bytes for "private" single byte encodings 148 * (According to the MULE docs, we should be using 0x9e for this) 149 */ 150 #define LCPRV1_A 0x9a 151 #define LCPRV1_B 0x9b 152 #define IS_LCPRV1(c) ((unsigned char)(c) == LCPRV1_A || (unsigned char)(c) == LCPRV1_B) 153 #define IS_LCPRV1_A_RANGE(c) \ 154 ((unsigned char)(c) >= 0xa0 && (unsigned char)(c) <= 0xdf) 155 #define IS_LCPRV1_B_RANGE(c) \ 156 ((unsigned char)(c) >= 0xe0 && (unsigned char)(c) <= 0xef) 157 158 /* 159 * Postgres-specific prefix bytes for "private" multibyte encodings 160 * (According to the MULE docs, we should be using 0x9f for this) 161 */ 162 #define LCPRV2_A 0x9c 163 #define LCPRV2_B 0x9d 164 #define IS_LCPRV2(c) ((unsigned char)(c) == LCPRV2_A || (unsigned char)(c) == LCPRV2_B) 165 #define IS_LCPRV2_A_RANGE(c) \ 166 ((unsigned char)(c) >= 0xf0 && (unsigned char)(c) <= 0xf4) 167 #define IS_LCPRV2_B_RANGE(c) \ 168 ((unsigned char)(c) >= 0xf5 && (unsigned char)(c) <= 0xfe) 169 170 /* 171 * Charset IDs for private single byte encodings (0xa0-0xef) 172 */ 173 #define LC_SISHENG 0xa0 /* Chinese SiSheng characters for 174 * PinYin/ZhuYin (not supported) */ 175 #define LC_IPA 0xa1 /* IPA (International Phonetic 176 * Association) (not supported) */ 177 #define LC_VISCII_LOWER 0xa2 /* Vietnamese VISCII1.1 lower-case (not 178 * supported) */ 179 #define LC_VISCII_UPPER 0xa3 /* Vietnamese VISCII1.1 upper-case (not 180 * supported) */ 181 #define LC_ARABIC_DIGIT 0xa4 /* Arabic digit (not supported) */ 182 #define LC_ARABIC_1_COLUMN 0xa5 /* Arabic 1-column (not supported) */ 183 #define LC_ASCII_RIGHT_TO_LEFT 0xa6 /* ASCII (left half of ISO8859-1) with 184 * right-to-left direction (not 185 * supported) */ 186 #define LC_LAO 0xa7 /* Lao characters (ISO10646 0E80..0EDF) 187 * (not supported) */ 188 #define LC_ARABIC_2_COLUMN 0xa8 /* Arabic 1-column (not supported) */ 189 190 /* 191 * Charset IDs for private multibyte encodings (0xf0-0xff) 192 */ 193 #define LC_INDIAN_1_COLUMN 0xf0 /* Indian charset for 1-column width 194 * glyphs (not supported) */ 195 #define LC_TIBETAN_1_COLUMN 0xf1 /* Tibetan 1-column width glyphs (not 196 * supported) */ 197 #define LC_UNICODE_SUBSET_2 0xf2 /* Unicode characters of the range 198 * U+2500..U+33FF. (not supported) */ 199 #define LC_UNICODE_SUBSET_3 0xf3 /* Unicode characters of the range 200 * U+E000..U+FFFF. (not supported) */ 201 #define LC_UNICODE_SUBSET 0xf4 /* Unicode characters of the range 202 * U+0100..U+24FF. (not supported) */ 203 #define LC_ETHIOPIC 0xf5 /* Ethiopic characters (not supported) */ 204 #define LC_CNS11643_3 0xf6 /* CNS 11643-1992 Plane 3 */ 205 #define LC_CNS11643_4 0xf7 /* CNS 11643-1992 Plane 4 */ 206 #define LC_CNS11643_5 0xf8 /* CNS 11643-1992 Plane 5 */ 207 #define LC_CNS11643_6 0xf9 /* CNS 11643-1992 Plane 6 */ 208 #define LC_CNS11643_7 0xfa /* CNS 11643-1992 Plane 7 */ 209 #define LC_INDIAN_2_COLUMN 0xfb /* Indian charset for 2-column width 210 * glyphs (not supported) */ 211 #define LC_TIBETAN 0xfc /* Tibetan (not supported) */ 212 /* #define FREE 0xfd free (unused) */ 213 /* #define FREE 0xfe free (unused) */ 214 /* #define FREE 0xff free (unused) */ 215 216 /*---------------------------------------------------- 217 * end of MULE stuff 218 *---------------------------------------------------- 219 */ 220 221 /* 222 * PostgreSQL encoding identifiers 223 * 224 * WARNING: the order of this enum must be same as order of entries 225 * in the pg_enc2name_tbl[] array (in mb/encnames.c), and 226 * in the pg_wchar_table[] array (in mb/wchar.c)! 227 * 228 * If you add some encoding don't forget to check 229 * PG_ENCODING_BE_LAST macro. 230 * 231 * PG_SQL_ASCII is default encoding and must be = 0. 232 * 233 * XXX We must avoid renumbering any backend encoding until libpq's major 234 * version number is increased beyond 5; it turns out that the backend 235 * encoding IDs are effectively part of libpq's ABI as far as 8.2 initdb and 236 * psql are concerned. 237 */ 238 typedef enum pg_enc 239 { 240 PG_SQL_ASCII = 0, /* SQL/ASCII */ 241 PG_EUC_JP, /* EUC for Japanese */ 242 PG_EUC_CN, /* EUC for Chinese */ 243 PG_EUC_KR, /* EUC for Korean */ 244 PG_EUC_TW, /* EUC for Taiwan */ 245 PG_EUC_JIS_2004, /* EUC-JIS-2004 */ 246 PG_UTF8, /* Unicode UTF8 */ 247 PG_MULE_INTERNAL, /* Mule internal code */ 248 PG_LATIN1, /* ISO-8859-1 Latin 1 */ 249 PG_LATIN2, /* ISO-8859-2 Latin 2 */ 250 PG_LATIN3, /* ISO-8859-3 Latin 3 */ 251 PG_LATIN4, /* ISO-8859-4 Latin 4 */ 252 PG_LATIN5, /* ISO-8859-9 Latin 5 */ 253 PG_LATIN6, /* ISO-8859-10 Latin6 */ 254 PG_LATIN7, /* ISO-8859-13 Latin7 */ 255 PG_LATIN8, /* ISO-8859-14 Latin8 */ 256 PG_LATIN9, /* ISO-8859-15 Latin9 */ 257 PG_LATIN10, /* ISO-8859-16 Latin10 */ 258 PG_WIN1256, /* windows-1256 */ 259 PG_WIN1258, /* Windows-1258 */ 260 PG_WIN866, /* (MS-DOS CP866) */ 261 PG_WIN874, /* windows-874 */ 262 PG_KOI8R, /* KOI8-R */ 263 PG_WIN1251, /* windows-1251 */ 264 PG_WIN1252, /* windows-1252 */ 265 PG_ISO_8859_5, /* ISO-8859-5 */ 266 PG_ISO_8859_6, /* ISO-8859-6 */ 267 PG_ISO_8859_7, /* ISO-8859-7 */ 268 PG_ISO_8859_8, /* ISO-8859-8 */ 269 PG_WIN1250, /* windows-1250 */ 270 PG_WIN1253, /* windows-1253 */ 271 PG_WIN1254, /* windows-1254 */ 272 PG_WIN1255, /* windows-1255 */ 273 PG_WIN1257, /* windows-1257 */ 274 PG_KOI8U, /* KOI8-U */ 275 /* PG_ENCODING_BE_LAST points to the above entry */ 276 277 /* followings are for client encoding only */ 278 PG_SJIS, /* Shift JIS (Windows-932) */ 279 PG_BIG5, /* Big5 (Windows-950) */ 280 PG_GBK, /* GBK (Windows-936) */ 281 PG_UHC, /* UHC (Windows-949) */ 282 PG_GB18030, /* GB18030 */ 283 PG_JOHAB, /* EUC for Korean JOHAB */ 284 PG_SHIFT_JIS_2004, /* Shift-JIS-2004 */ 285 _PG_LAST_ENCODING_ /* mark only */ 286 287 } pg_enc; 288 289 #define PG_ENCODING_BE_LAST PG_KOI8U 290 291 /* 292 * Please use these tests before access to pg_encconv_tbl[] 293 * or to other places... 294 */ 295 #define PG_VALID_BE_ENCODING(_enc) \ 296 ((_enc) >= 0 && (_enc) <= PG_ENCODING_BE_LAST) 297 298 #define PG_ENCODING_IS_CLIENT_ONLY(_enc) \ 299 ((_enc) > PG_ENCODING_BE_LAST && (_enc) < _PG_LAST_ENCODING_) 300 301 #define PG_VALID_ENCODING(_enc) \ 302 ((_enc) >= 0 && (_enc) < _PG_LAST_ENCODING_) 303 304 /* On FE are possible all encodings */ 305 #define PG_VALID_FE_ENCODING(_enc) PG_VALID_ENCODING(_enc) 306 307 /* 308 * When converting strings between different encodings, we assume that space 309 * for converted result is 4-to-1 growth in the worst case. The rate for 310 * currently supported encoding pairs are within 3 (SJIS JIS X0201 half width 311 * kanna -> UTF8 is the worst case). So "4" should be enough for the moment. 312 * 313 * Note that this is not the same as the maximum character width in any 314 * particular encoding. 315 */ 316 #define MAX_CONVERSION_GROWTH 4 317 318 /* 319 * Table for mapping an encoding number to official encoding name and 320 * possibly other subsidiary data. Be careful to check encoding number 321 * before accessing a table entry! 322 * 323 * if (PG_VALID_ENCODING(encoding)) 324 * pg_enc2name_tbl[ encoding ]; 325 */ 326 typedef struct pg_enc2name 327 { 328 const char *name; 329 pg_enc encoding; 330 #ifdef WIN32 331 unsigned codepage; /* codepage for WIN32 */ 332 #endif 333 } pg_enc2name; 334 335 extern const pg_enc2name pg_enc2name_tbl[]; 336 337 /* 338 * Encoding names for gettext 339 */ 340 typedef struct pg_enc2gettext 341 { 342 pg_enc encoding; 343 const char *name; 344 } pg_enc2gettext; 345 346 extern const pg_enc2gettext pg_enc2gettext_tbl[]; 347 348 /* 349 * Encoding names for ICU 350 */ 351 extern bool is_encoding_supported_by_icu(int encoding); 352 extern const char *get_encoding_name_for_icu(int encoding); 353 354 /* 355 * pg_wchar stuff 356 */ 357 typedef int (*mb2wchar_with_len_converter) (const unsigned char *from, 358 pg_wchar *to, 359 int len); 360 361 typedef int (*wchar2mb_with_len_converter) (const pg_wchar *from, 362 unsigned char *to, 363 int len); 364 365 typedef int (*mblen_converter) (const unsigned char *mbstr); 366 367 typedef int (*mbdisplaylen_converter) (const unsigned char *mbstr); 368 369 typedef bool (*mbcharacter_incrementer) (unsigned char *mbstr, int len); 370 371 typedef int (*mbverifier) (const unsigned char *mbstr, int len); 372 373 typedef struct 374 { 375 mb2wchar_with_len_converter mb2wchar_with_len; /* convert a multibyte 376 * string to a wchar */ 377 wchar2mb_with_len_converter wchar2mb_with_len; /* convert a wchar string 378 * to a multibyte */ 379 mblen_converter mblen; /* get byte length of a char */ 380 mbdisplaylen_converter dsplen; /* get display width of a char */ 381 mbverifier mbverify; /* verify multibyte sequence */ 382 int maxmblen; /* max bytes for a char in this encoding */ 383 } pg_wchar_tbl; 384 385 extern const pg_wchar_tbl pg_wchar_table[]; 386 387 /* 388 * Data structures for conversions between UTF-8 and other encodings 389 * (UtfToLocal() and LocalToUtf()). In these data structures, characters of 390 * either encoding are represented by uint32 words; hence we can only support 391 * characters up to 4 bytes long. For example, the byte sequence 0xC2 0x89 392 * would be represented by 0x0000C289, and 0xE8 0xA2 0xB4 by 0x00E8A2B4. 393 * 394 * There are three possible ways a character can be mapped: 395 * 396 * 1. Using a radix tree, from source to destination code. 397 * 2. Using a sorted array of source -> destination code pairs. This 398 * method is used for "combining" characters. There are so few of 399 * them that building a radix tree would be wasteful. 400 * 3. Using a conversion function. 401 */ 402 403 /* 404 * Radix tree for character conversion. 405 * 406 * Logically, this is actually four different radix trees, for 1-byte, 407 * 2-byte, 3-byte and 4-byte inputs. The 1-byte tree is a simple lookup 408 * table from source to target code. The 2-byte tree consists of two levels: 409 * one lookup table for the first byte, where the value in the lookup table 410 * points to a lookup table for the second byte. And so on. 411 * 412 * Physically, all the trees are stored in one big array, in 'chars16' or 413 * 'chars32', depending on the maximum value that needs to be represented. For 414 * each level in each tree, we also store lower and upper bound of allowed 415 * values - values outside those bounds are considered invalid, and are left 416 * out of the tables. 417 * 418 * In the intermediate levels of the trees, the values stored are offsets 419 * into the chars[16|32] array. 420 * 421 * In the beginning of the chars[16|32] array, there is always a number of 422 * zeros, so that you safely follow an index from an intermediate table 423 * without explicitly checking for a zero. Following a zero any number of 424 * times will always bring you to the dummy, all-zeros table in the 425 * beginning. This helps to shave some cycles when looking up values. 426 */ 427 typedef struct 428 { 429 /* 430 * Array containing all the values. Only one of chars16 or chars32 is 431 * used, depending on how wide the values we need to represent are. 432 */ 433 const uint16 *chars16; 434 const uint32 *chars32; 435 436 /* Radix tree for 1-byte inputs */ 437 uint32 b1root; /* offset of table in the chars[16|32] array */ 438 uint8 b1_lower; /* min allowed value for a single byte input */ 439 uint8 b1_upper; /* max allowed value for a single byte input */ 440 441 /* Radix tree for 2-byte inputs */ 442 uint32 b2root; /* offset of 1st byte's table */ 443 uint8 b2_1_lower; /* min/max allowed value for 1st input byte */ 444 uint8 b2_1_upper; 445 uint8 b2_2_lower; /* min/max allowed value for 2nd input byte */ 446 uint8 b2_2_upper; 447 448 /* Radix tree for 3-byte inputs */ 449 uint32 b3root; /* offset of 1st byte's table */ 450 uint8 b3_1_lower; /* min/max allowed value for 1st input byte */ 451 uint8 b3_1_upper; 452 uint8 b3_2_lower; /* min/max allowed value for 2nd input byte */ 453 uint8 b3_2_upper; 454 uint8 b3_3_lower; /* min/max allowed value for 3rd input byte */ 455 uint8 b3_3_upper; 456 457 /* Radix tree for 4-byte inputs */ 458 uint32 b4root; /* offset of 1st byte's table */ 459 uint8 b4_1_lower; /* min/max allowed value for 1st input byte */ 460 uint8 b4_1_upper; 461 uint8 b4_2_lower; /* min/max allowed value for 2nd input byte */ 462 uint8 b4_2_upper; 463 uint8 b4_3_lower; /* min/max allowed value for 3rd input byte */ 464 uint8 b4_3_upper; 465 uint8 b4_4_lower; /* min/max allowed value for 4th input byte */ 466 uint8 b4_4_upper; 467 468 } pg_mb_radix_tree; 469 470 /* 471 * UTF-8 to local code conversion map (for combined characters) 472 */ 473 typedef struct 474 { 475 uint32 utf1; /* UTF-8 code 1 */ 476 uint32 utf2; /* UTF-8 code 2 */ 477 uint32 code; /* local code */ 478 } pg_utf_to_local_combined; 479 480 /* 481 * local code to UTF-8 conversion map (for combined characters) 482 */ 483 typedef struct 484 { 485 uint32 code; /* local code */ 486 uint32 utf1; /* UTF-8 code 1 */ 487 uint32 utf2; /* UTF-8 code 2 */ 488 } pg_local_to_utf_combined; 489 490 /* 491 * callback function for algorithmic encoding conversions (in either direction) 492 * 493 * if function returns zero, it does not know how to convert the code 494 */ 495 typedef uint32 (*utf_local_conversion_func) (uint32 code); 496 497 /* 498 * Support macro for encoding conversion functions to validate their 499 * arguments. (This could be made more compact if we included fmgr.h 500 * here, but we don't want to do that because this header file is also 501 * used by frontends.) 502 */ 503 #define CHECK_ENCODING_CONVERSION_ARGS(srcencoding,destencoding) \ 504 check_encoding_conversion_args(PG_GETARG_INT32(0), \ 505 PG_GETARG_INT32(1), \ 506 PG_GETARG_INT32(4), \ 507 (srcencoding), \ 508 (destencoding)) 509 510 511 /* 512 * These functions are considered part of libpq's exported API and 513 * are also declared in libpq-fe.h. 514 */ 515 extern int pg_char_to_encoding(const char *name); 516 extern const char *pg_encoding_to_char(int encoding); 517 extern int pg_valid_server_encoding_id(int encoding); 518 519 /* 520 * Remaining functions are not considered part of libpq's API, though many 521 * of them do exist inside libpq. 522 */ 523 extern int pg_mb2wchar(const char *from, pg_wchar *to); 524 extern int pg_mb2wchar_with_len(const char *from, pg_wchar *to, int len); 525 extern int pg_encoding_mb2wchar_with_len(int encoding, 526 const char *from, pg_wchar *to, int len); 527 extern int pg_wchar2mb(const pg_wchar *from, char *to); 528 extern int pg_wchar2mb_with_len(const pg_wchar *from, char *to, int len); 529 extern int pg_encoding_wchar2mb_with_len(int encoding, 530 const pg_wchar *from, char *to, int len); 531 extern int pg_char_and_wchar_strcmp(const char *s1, const pg_wchar *s2); 532 extern int pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n); 533 extern int pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n); 534 extern size_t pg_wchar_strlen(const pg_wchar *wstr); 535 extern int pg_mblen(const char *mbstr); 536 extern int pg_dsplen(const char *mbstr); 537 extern int pg_encoding_mblen(int encoding, const char *mbstr); 538 extern int pg_encoding_dsplen(int encoding, const char *mbstr); 539 extern int pg_encoding_verifymb(int encoding, const char *mbstr, int len); 540 extern int pg_mule_mblen(const unsigned char *mbstr); 541 extern int pg_mic_mblen(const unsigned char *mbstr); 542 extern int pg_mbstrlen(const char *mbstr); 543 extern int pg_mbstrlen_with_len(const char *mbstr, int len); 544 extern int pg_mbcliplen(const char *mbstr, int len, int limit); 545 extern int pg_encoding_mbcliplen(int encoding, const char *mbstr, 546 int len, int limit); 547 extern int pg_mbcharcliplen(const char *mbstr, int len, int imit); 548 extern int pg_encoding_max_length(int encoding); 549 extern int pg_database_encoding_max_length(void); 550 extern mbcharacter_incrementer pg_database_encoding_character_incrementer(void); 551 552 extern int PrepareClientEncoding(int encoding); 553 extern int SetClientEncoding(int encoding); 554 extern void InitializeClientEncoding(void); 555 extern int pg_get_client_encoding(void); 556 extern const char *pg_get_client_encoding_name(void); 557 558 extern void SetDatabaseEncoding(int encoding); 559 extern int GetDatabaseEncoding(void); 560 extern const char *GetDatabaseEncodingName(void); 561 extern void SetMessageEncoding(int encoding); 562 extern int GetMessageEncoding(void); 563 564 #ifdef ENABLE_NLS 565 extern int pg_bind_textdomain_codeset(const char *domainname); 566 #endif 567 568 extern int pg_valid_client_encoding(const char *name); 569 extern int pg_valid_server_encoding(const char *name); 570 571 extern unsigned char *unicode_to_utf8(pg_wchar c, unsigned char *utf8string); 572 extern pg_wchar utf8_to_unicode(const unsigned char *c); 573 extern int pg_utf_mblen(const unsigned char *); 574 extern unsigned char *pg_do_encoding_conversion(unsigned char *src, int len, 575 int src_encoding, 576 int dest_encoding); 577 578 extern char *pg_client_to_server(const char *s, int len); 579 extern char *pg_server_to_client(const char *s, int len); 580 extern char *pg_any_to_server(const char *s, int len, int encoding); 581 extern char *pg_server_to_any(const char *s, int len, int encoding); 582 583 extern unsigned short BIG5toCNS(unsigned short big5, unsigned char *lc); 584 extern unsigned short CNStoBIG5(unsigned short cns, unsigned char lc); 585 586 extern void UtfToLocal(const unsigned char *utf, int len, 587 unsigned char *iso, 588 const pg_mb_radix_tree *map, 589 const pg_utf_to_local_combined *cmap, int cmapsize, 590 utf_local_conversion_func conv_func, 591 int encoding); 592 extern void LocalToUtf(const unsigned char *iso, int len, 593 unsigned char *utf, 594 const pg_mb_radix_tree *map, 595 const pg_local_to_utf_combined *cmap, int cmapsize, 596 utf_local_conversion_func conv_func, 597 int encoding); 598 599 extern bool pg_verifymbstr(const char *mbstr, int len, bool noError); 600 extern bool pg_verify_mbstr(int encoding, const char *mbstr, int len, 601 bool noError); 602 extern int pg_verify_mbstr_len(int encoding, const char *mbstr, int len, 603 bool noError); 604 605 extern void check_encoding_conversion_args(int src_encoding, 606 int dest_encoding, 607 int len, 608 int expected_src_encoding, 609 int expected_dest_encoding); 610 611 extern void report_invalid_encoding(int encoding, const char *mbstr, int len) pg_attribute_noreturn(); 612 extern void report_untranslatable_char(int src_encoding, int dest_encoding, 613 const char *mbstr, int len) pg_attribute_noreturn(); 614 615 extern void local2local(const unsigned char *l, unsigned char *p, int len, 616 int src_encoding, int dest_encoding, const unsigned char *tab); 617 extern void pg_ascii2mic(const unsigned char *l, unsigned char *p, int len); 618 extern void pg_mic2ascii(const unsigned char *mic, unsigned char *p, int len); 619 extern void latin2mic(const unsigned char *l, unsigned char *p, int len, 620 int lc, int encoding); 621 extern void mic2latin(const unsigned char *mic, unsigned char *p, int len, 622 int lc, int encoding); 623 extern void latin2mic_with_table(const unsigned char *l, unsigned char *p, 624 int len, int lc, int encoding, 625 const unsigned char *tab); 626 extern void mic2latin_with_table(const unsigned char *mic, unsigned char *p, 627 int len, int lc, int encoding, 628 const unsigned char *tab); 629 630 extern bool pg_utf8_islegal(const unsigned char *source, int length); 631 632 #ifdef WIN32 633 extern WCHAR *pgwin32_message_to_UTF16(const char *str, int len, int *utf16len); 634 #endif 635 636 #endif /* PG_WCHAR_H */ 637