diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/utils/mb/Makefile | 2 | ||||
| -rw-r--r-- | src/backend/utils/mb/README | 10 | ||||
| -rw-r--r-- | src/backend/utils/mb/encnames.c | 629 | ||||
| -rw-r--r-- | src/backend/utils/mb/wchar.c | 2036 |
4 files changed, 6 insertions, 2671 deletions
diff --git a/src/backend/utils/mb/Makefile b/src/backend/utils/mb/Makefile index cd4a016449e..b19a125fa2f 100644 --- a/src/backend/utils/mb/Makefile +++ b/src/backend/utils/mb/Makefile @@ -14,10 +14,8 @@ include $(top_builddir)/src/Makefile.global OBJS = \ conv.o \ - encnames.o \ mbutils.o \ stringinfo_mb.o \ - wchar.o \ wstrcmp.o \ wstrncmp.o diff --git a/src/backend/utils/mb/README b/src/backend/utils/mb/README index 7495ca5db23..ef366268913 100644 --- a/src/backend/utils/mb/README +++ b/src/backend/utils/mb/README @@ -3,12 +3,8 @@ src/backend/utils/mb/README Encodings ========= -encnames.c: public functions for both the backend and the frontend. conv.c: static functions and a public table for code conversion -wchar.c: mostly static functions and a public table for mb string and - multibyte conversion mbutils.c: public functions for the backend only. - requires conv.c and wchar.c stringinfo_mb.c: public backend-only multibyte-aware stringinfo functions wstrcmp.c: strcmp for mb wstrncmp.c: strncmp for mb @@ -16,6 +12,12 @@ win866.c: a tool to generate KOI8 <--> CP866 conversion table iso.c: a tool to generate KOI8 <--> ISO8859-5 conversion table win1251.c: a tool to generate KOI8 <--> CP1251 conversion table +See also in src/common/: + +encnames.c: public functions for encoding names +wchar.c: mostly static functions and a public table for mb string and + multibyte conversion + Introduction ------------ http://www.cprogramming.com/tutorial/unicode.html diff --git a/src/backend/utils/mb/encnames.c b/src/backend/utils/mb/encnames.c deleted file mode 100644 index 12b61cd3db9..00000000000 --- a/src/backend/utils/mb/encnames.c +++ /dev/null @@ -1,629 +0,0 @@ -/* - * Encoding names and routines for work with it. All - * in this file is shared between FE and BE. - * - * src/backend/utils/mb/encnames.c - */ -#ifdef FRONTEND -#include "postgres_fe.h" -#else -#include "postgres.h" -#include "utils/builtins.h" -#endif - -#include <ctype.h> -#include <unistd.h> - -#include "mb/pg_wchar.h" - - -/* ---------- - * All encoding names, sorted: *** A L P H A B E T I C *** - * - * All names must be without irrelevant chars, search routines use - * isalnum() chars only. It means ISO-8859-1, iso_8859-1 and Iso8859_1 - * are always converted to 'iso88591'. All must be lower case. - * - * The table doesn't contain 'cs' aliases (like csISOLatin1). It's needed? - * - * Karel Zak, Aug 2001 - * ---------- - */ -typedef struct pg_encname -{ - const char *name; - pg_enc encoding; -} pg_encname; - -static const pg_encname pg_encname_tbl[] = -{ - { - "abc", PG_WIN1258 - }, /* alias for WIN1258 */ - { - "alt", PG_WIN866 - }, /* IBM866 */ - { - "big5", PG_BIG5 - }, /* Big5; Chinese for Taiwan multibyte set */ - { - "euccn", PG_EUC_CN - }, /* EUC-CN; Extended Unix Code for simplified - * Chinese */ - { - "eucjis2004", PG_EUC_JIS_2004 - }, /* EUC-JIS-2004; Extended UNIX Code fixed - * Width for Japanese, standard JIS X 0213 */ - { - "eucjp", PG_EUC_JP - }, /* EUC-JP; Extended UNIX Code fixed Width for - * Japanese, standard OSF */ - { - "euckr", PG_EUC_KR - }, /* EUC-KR; Extended Unix Code for Korean , KS - * X 1001 standard */ - { - "euctw", PG_EUC_TW - }, /* EUC-TW; Extended Unix Code for - * - * traditional Chinese */ - { - "gb18030", PG_GB18030 - }, /* GB18030;GB18030 */ - { - "gbk", PG_GBK - }, /* GBK; Chinese Windows CodePage 936 - * simplified Chinese */ - { - "iso88591", PG_LATIN1 - }, /* ISO-8859-1; RFC1345,KXS2 */ - { - "iso885910", PG_LATIN6 - }, /* ISO-8859-10; RFC1345,KXS2 */ - { - "iso885913", PG_LATIN7 - }, /* ISO-8859-13; RFC1345,KXS2 */ - { - "iso885914", PG_LATIN8 - }, /* ISO-8859-14; RFC1345,KXS2 */ - { - "iso885915", PG_LATIN9 - }, /* ISO-8859-15; RFC1345,KXS2 */ - { - "iso885916", PG_LATIN10 - }, /* ISO-8859-16; RFC1345,KXS2 */ - { - "iso88592", PG_LATIN2 - }, /* ISO-8859-2; RFC1345,KXS2 */ - { - "iso88593", PG_LATIN3 - }, /* ISO-8859-3; RFC1345,KXS2 */ - { - "iso88594", PG_LATIN4 - }, /* ISO-8859-4; RFC1345,KXS2 */ - { - "iso88595", PG_ISO_8859_5 - }, /* ISO-8859-5; RFC1345,KXS2 */ - { - "iso88596", PG_ISO_8859_6 - }, /* ISO-8859-6; RFC1345,KXS2 */ - { - "iso88597", PG_ISO_8859_7 - }, /* ISO-8859-7; RFC1345,KXS2 */ - { - "iso88598", PG_ISO_8859_8 - }, /* ISO-8859-8; RFC1345,KXS2 */ - { - "iso88599", PG_LATIN5 - }, /* ISO-8859-9; RFC1345,KXS2 */ - { - "johab", PG_JOHAB - }, /* JOHAB; Extended Unix Code for simplified - * Chinese */ - { - "koi8", PG_KOI8R - }, /* _dirty_ alias for KOI8-R (backward - * compatibility) */ - { - "koi8r", PG_KOI8R - }, /* KOI8-R; RFC1489 */ - { - "koi8u", PG_KOI8U - }, /* KOI8-U; RFC2319 */ - { - "latin1", PG_LATIN1 - }, /* alias for ISO-8859-1 */ - { - "latin10", PG_LATIN10 - }, /* alias for ISO-8859-16 */ - { - "latin2", PG_LATIN2 - }, /* alias for ISO-8859-2 */ - { - "latin3", PG_LATIN3 - }, /* alias for ISO-8859-3 */ - { - "latin4", PG_LATIN4 - }, /* alias for ISO-8859-4 */ - { - "latin5", PG_LATIN5 - }, /* alias for ISO-8859-9 */ - { - "latin6", PG_LATIN6 - }, /* alias for ISO-8859-10 */ - { - "latin7", PG_LATIN7 - }, /* alias for ISO-8859-13 */ - { - "latin8", PG_LATIN8 - }, /* alias for ISO-8859-14 */ - { - "latin9", PG_LATIN9 - }, /* alias for ISO-8859-15 */ - { - "mskanji", PG_SJIS - }, /* alias for Shift_JIS */ - { - "muleinternal", PG_MULE_INTERNAL - }, - { - "shiftjis", PG_SJIS - }, /* Shift_JIS; JIS X 0202-1991 */ - - { - "shiftjis2004", PG_SHIFT_JIS_2004 - }, /* SHIFT-JIS-2004; Shift JIS for Japanese, - * standard JIS X 0213 */ - { - "sjis", PG_SJIS - }, /* alias for Shift_JIS */ - { - "sqlascii", PG_SQL_ASCII - }, - { - "tcvn", PG_WIN1258 - }, /* alias for WIN1258 */ - { - "tcvn5712", PG_WIN1258 - }, /* alias for WIN1258 */ - { - "uhc", PG_UHC - }, /* UHC; Korean Windows CodePage 949 */ - { - "unicode", PG_UTF8 - }, /* alias for UTF8 */ - { - "utf8", PG_UTF8 - }, /* alias for UTF8 */ - { - "vscii", PG_WIN1258 - }, /* alias for WIN1258 */ - { - "win", PG_WIN1251 - }, /* _dirty_ alias for windows-1251 (backward - * compatibility) */ - { - "win1250", PG_WIN1250 - }, /* alias for Windows-1250 */ - { - "win1251", PG_WIN1251 - }, /* alias for Windows-1251 */ - { - "win1252", PG_WIN1252 - }, /* alias for Windows-1252 */ - { - "win1253", PG_WIN1253 - }, /* alias for Windows-1253 */ - { - "win1254", PG_WIN1254 - }, /* alias for Windows-1254 */ - { - "win1255", PG_WIN1255 - }, /* alias for Windows-1255 */ - { - "win1256", PG_WIN1256 - }, /* alias for Windows-1256 */ - { - "win1257", PG_WIN1257 - }, /* alias for Windows-1257 */ - { - "win1258", PG_WIN1258 - }, /* alias for Windows-1258 */ - { - "win866", PG_WIN866 - }, /* IBM866 */ - { - "win874", PG_WIN874 - }, /* alias for Windows-874 */ - { - "win932", PG_SJIS - }, /* alias for Shift_JIS */ - { - "win936", PG_GBK - }, /* alias for GBK */ - { - "win949", PG_UHC - }, /* alias for UHC */ - { - "win950", PG_BIG5 - }, /* alias for BIG5 */ - { - "windows1250", PG_WIN1250 - }, /* Windows-1251; Microsoft */ - { - "windows1251", PG_WIN1251 - }, /* Windows-1251; Microsoft */ - { - "windows1252", PG_WIN1252 - }, /* Windows-1252; Microsoft */ - { - "windows1253", PG_WIN1253 - }, /* Windows-1253; Microsoft */ - { - "windows1254", PG_WIN1254 - }, /* Windows-1254; Microsoft */ - { - "windows1255", PG_WIN1255 - }, /* Windows-1255; Microsoft */ - { - "windows1256", PG_WIN1256 - }, /* Windows-1256; Microsoft */ - { - "windows1257", PG_WIN1257 - }, /* Windows-1257; Microsoft */ - { - "windows1258", PG_WIN1258 - }, /* Windows-1258; Microsoft */ - { - "windows866", PG_WIN866 - }, /* IBM866 */ - { - "windows874", PG_WIN874 - }, /* Windows-874; Microsoft */ - { - "windows932", PG_SJIS - }, /* alias for Shift_JIS */ - { - "windows936", PG_GBK - }, /* alias for GBK */ - { - "windows949", PG_UHC - }, /* alias for UHC */ - { - "windows950", PG_BIG5 - } /* alias for BIG5 */ -}; - -/* ---------- - * These are "official" encoding names. - * XXX must be sorted by the same order as enum pg_enc (in mb/pg_wchar.h) - * ---------- - */ -#ifndef WIN32 -#define DEF_ENC2NAME(name, codepage) { #name, PG_##name } -#else -#define DEF_ENC2NAME(name, codepage) { #name, PG_##name, codepage } -#endif -const pg_enc2name pg_enc2name_tbl[] = -{ - DEF_ENC2NAME(SQL_ASCII, 0), - DEF_ENC2NAME(EUC_JP, 20932), - DEF_ENC2NAME(EUC_CN, 20936), - DEF_ENC2NAME(EUC_KR, 51949), - DEF_ENC2NAME(EUC_TW, 0), - DEF_ENC2NAME(EUC_JIS_2004, 20932), - DEF_ENC2NAME(UTF8, 65001), - DEF_ENC2NAME(MULE_INTERNAL, 0), - DEF_ENC2NAME(LATIN1, 28591), - DEF_ENC2NAME(LATIN2, 28592), - DEF_ENC2NAME(LATIN3, 28593), - DEF_ENC2NAME(LATIN4, 28594), - DEF_ENC2NAME(LATIN5, 28599), - DEF_ENC2NAME(LATIN6, 0), - DEF_ENC2NAME(LATIN7, 0), - DEF_ENC2NAME(LATIN8, 0), - DEF_ENC2NAME(LATIN9, 28605), - DEF_ENC2NAME(LATIN10, 0), - DEF_ENC2NAME(WIN1256, 1256), - DEF_ENC2NAME(WIN1258, 1258), - DEF_ENC2NAME(WIN866, 866), - DEF_ENC2NAME(WIN874, 874), - DEF_ENC2NAME(KOI8R, 20866), - DEF_ENC2NAME(WIN1251, 1251), - DEF_ENC2NAME(WIN1252, 1252), - DEF_ENC2NAME(ISO_8859_5, 28595), - DEF_ENC2NAME(ISO_8859_6, 28596), - DEF_ENC2NAME(ISO_8859_7, 28597), - DEF_ENC2NAME(ISO_8859_8, 28598), - DEF_ENC2NAME(WIN1250, 1250), - DEF_ENC2NAME(WIN1253, 1253), - DEF_ENC2NAME(WIN1254, 1254), - DEF_ENC2NAME(WIN1255, 1255), - DEF_ENC2NAME(WIN1257, 1257), - DEF_ENC2NAME(KOI8U, 21866), - DEF_ENC2NAME(SJIS, 932), - DEF_ENC2NAME(BIG5, 950), - DEF_ENC2NAME(GBK, 936), - DEF_ENC2NAME(UHC, 949), - DEF_ENC2NAME(GB18030, 54936), - DEF_ENC2NAME(JOHAB, 0), - DEF_ENC2NAME(SHIFT_JIS_2004, 932) -}; - -/* ---------- - * These are encoding names for gettext. - * - * This covers all encodings except MULE_INTERNAL, which is alien to gettext. - * ---------- - */ -const pg_enc2gettext pg_enc2gettext_tbl[] = -{ - {PG_SQL_ASCII, "US-ASCII"}, - {PG_UTF8, "UTF-8"}, - {PG_LATIN1, "LATIN1"}, - {PG_LATIN2, "LATIN2"}, - {PG_LATIN3, "LATIN3"}, - {PG_LATIN4, "LATIN4"}, - {PG_ISO_8859_5, "ISO-8859-5"}, - {PG_ISO_8859_6, "ISO_8859-6"}, - {PG_ISO_8859_7, "ISO-8859-7"}, - {PG_ISO_8859_8, "ISO-8859-8"}, - {PG_LATIN5, "LATIN5"}, - {PG_LATIN6, "LATIN6"}, - {PG_LATIN7, "LATIN7"}, - {PG_LATIN8, "LATIN8"}, - {PG_LATIN9, "LATIN-9"}, - {PG_LATIN10, "LATIN10"}, - {PG_KOI8R, "KOI8-R"}, - {PG_KOI8U, "KOI8-U"}, - {PG_WIN1250, "CP1250"}, - {PG_WIN1251, "CP1251"}, - {PG_WIN1252, "CP1252"}, - {PG_WIN1253, "CP1253"}, - {PG_WIN1254, "CP1254"}, - {PG_WIN1255, "CP1255"}, - {PG_WIN1256, "CP1256"}, - {PG_WIN1257, "CP1257"}, - {PG_WIN1258, "CP1258"}, - {PG_WIN866, "CP866"}, - {PG_WIN874, "CP874"}, - {PG_EUC_CN, "EUC-CN"}, - {PG_EUC_JP, "EUC-JP"}, - {PG_EUC_KR, "EUC-KR"}, - {PG_EUC_TW, "EUC-TW"}, - {PG_EUC_JIS_2004, "EUC-JP"}, - {PG_SJIS, "SHIFT-JIS"}, - {PG_BIG5, "BIG5"}, - {PG_GBK, "GBK"}, - {PG_UHC, "UHC"}, - {PG_GB18030, "GB18030"}, - {PG_JOHAB, "JOHAB"}, - {PG_SHIFT_JIS_2004, "SHIFT_JISX0213"}, - {0, NULL} -}; - - -#ifndef FRONTEND - -/* - * Table of encoding names for ICU - * - * Reference: <https://ssl.icu-project.org/icu-bin/convexp> - * - * NULL entries are not supported by ICU, or their mapping is unclear. - */ -static const char *const pg_enc2icu_tbl[] = -{ - NULL, /* PG_SQL_ASCII */ - "EUC-JP", /* PG_EUC_JP */ - "EUC-CN", /* PG_EUC_CN */ - "EUC-KR", /* PG_EUC_KR */ - "EUC-TW", /* PG_EUC_TW */ - NULL, /* PG_EUC_JIS_2004 */ - "UTF-8", /* PG_UTF8 */ - NULL, /* PG_MULE_INTERNAL */ - "ISO-8859-1", /* PG_LATIN1 */ - "ISO-8859-2", /* PG_LATIN2 */ - "ISO-8859-3", /* PG_LATIN3 */ - "ISO-8859-4", /* PG_LATIN4 */ - "ISO-8859-9", /* PG_LATIN5 */ - "ISO-8859-10", /* PG_LATIN6 */ - "ISO-8859-13", /* PG_LATIN7 */ - "ISO-8859-14", /* PG_LATIN8 */ - "ISO-8859-15", /* PG_LATIN9 */ - NULL, /* PG_LATIN10 */ - "CP1256", /* PG_WIN1256 */ - "CP1258", /* PG_WIN1258 */ - "CP866", /* PG_WIN866 */ - NULL, /* PG_WIN874 */ - "KOI8-R", /* PG_KOI8R */ - "CP1251", /* PG_WIN1251 */ - "CP1252", /* PG_WIN1252 */ - "ISO-8859-5", /* PG_ISO_8859_5 */ - "ISO-8859-6", /* PG_ISO_8859_6 */ - "ISO-8859-7", /* PG_ISO_8859_7 */ - "ISO-8859-8", /* PG_ISO_8859_8 */ - "CP1250", /* PG_WIN1250 */ - "CP1253", /* PG_WIN1253 */ - "CP1254", /* PG_WIN1254 */ - "CP1255", /* PG_WIN1255 */ - "CP1257", /* PG_WIN1257 */ - "KOI8-U", /* PG_KOI8U */ -}; - -bool -is_encoding_supported_by_icu(int encoding) -{ - return (pg_enc2icu_tbl[encoding] != NULL); -} - -const char * -get_encoding_name_for_icu(int encoding) -{ - const char *icu_encoding_name; - - StaticAssertStmt(lengthof(pg_enc2icu_tbl) == PG_ENCODING_BE_LAST + 1, - "pg_enc2icu_tbl incomplete"); - - icu_encoding_name = pg_enc2icu_tbl[encoding]; - - if (!icu_encoding_name) - ereport(ERROR, - (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), - errmsg("encoding \"%s\" not supported by ICU", - pg_encoding_to_char(encoding)))); - - return icu_encoding_name; -} - -#endif /* not FRONTEND */ - - -/* ---------- - * Encoding checks, for error returns -1 else encoding id - * ---------- - */ -int -pg_valid_client_encoding(const char *name) -{ - int enc; - - if ((enc = pg_char_to_encoding(name)) < 0) - return -1; - - if (!PG_VALID_FE_ENCODING(enc)) - return -1; - - return enc; -} - -int -pg_valid_server_encoding(const char *name) -{ - int enc; - - if ((enc = pg_char_to_encoding(name)) < 0) - return -1; - - if (!PG_VALID_BE_ENCODING(enc)) - return -1; - - return enc; -} - -int -pg_valid_server_encoding_id(int encoding) -{ - return PG_VALID_BE_ENCODING(encoding); -} - -/* ---------- - * Remove irrelevant chars from encoding name - * ---------- - */ -static char * -clean_encoding_name(const char *key, char *newkey) -{ - const char *p; - char *np; - - for (p = key, np = newkey; *p != '\0'; p++) - { - if (isalnum((unsigned char) *p)) - { - if (*p >= 'A' && *p <= 'Z') - *np++ = *p + 'a' - 'A'; - else - *np++ = *p; - } - } - *np = '\0'; - return newkey; -} - -/* ---------- - * Search encoding by encoding name - * - * Returns encoding ID, or -1 for error - * ---------- - */ -int -pg_char_to_encoding(const char *name) -{ - unsigned int nel = lengthof(pg_encname_tbl); - const pg_encname *base = pg_encname_tbl, - *last = base + nel - 1, - *position; - int result; - char buff[NAMEDATALEN], - *key; - - if (name == NULL || *name == '\0') - return -1; - - if (strlen(name) >= NAMEDATALEN) - { -#ifdef FRONTEND - fprintf(stderr, "encoding name too long\n"); - return -1; -#else - ereport(ERROR, - (errcode(ERRCODE_NAME_TOO_LONG), - errmsg("encoding name too long"))); -#endif - } - key = clean_encoding_name(name, buff); - - while (last >= base) - { - position = base + ((last - base) >> 1); - result = key[0] - position->name[0]; - - if (result == 0) - { - result = strcmp(key, position->name); - if (result == 0) - return position->encoding; - } - if (result < 0) - last = position - 1; - else - base = position + 1; - } - return -1; -} - -#ifndef FRONTEND -Datum -PG_char_to_encoding(PG_FUNCTION_ARGS) -{ - Name s = PG_GETARG_NAME(0); - - PG_RETURN_INT32(pg_char_to_encoding(NameStr(*s))); -} -#endif - -const char * -pg_encoding_to_char(int encoding) -{ - if (PG_VALID_ENCODING(encoding)) - { - const pg_enc2name *p = &pg_enc2name_tbl[encoding]; - - Assert(encoding == p->encoding); - return p->name; - } - return ""; -} - -#ifndef FRONTEND -Datum -PG_encoding_to_char(PG_FUNCTION_ARGS) -{ - int32 encoding = PG_GETARG_INT32(0); - const char *encoding_name = pg_encoding_to_char(encoding); - - return DirectFunctionCall1(namein, CStringGetDatum(encoding_name)); -} - -#endif diff --git a/src/backend/utils/mb/wchar.c b/src/backend/utils/mb/wchar.c deleted file mode 100644 index 02e2588ffe1..00000000000 --- a/src/backend/utils/mb/wchar.c +++ /dev/null @@ -1,2036 +0,0 @@ -/* - * conversion functions between pg_wchar and multibyte streams. - * Tatsuo Ishii - * src/backend/utils/mb/wchar.c - * - */ -/* can be used in either frontend or backend */ -#ifdef FRONTEND -#include "postgres_fe.h" -#else -#include "postgres.h" -#endif - -#include "mb/pg_wchar.h" - - -/* - * Operations on multi-byte encodings are driven by a table of helper - * functions. - * - * To add an encoding support, define mblen(), dsplen() and verifier() for - * the encoding. For server-encodings, also define mb2wchar() and wchar2mb() - * conversion functions. - * - * These functions generally assume that their input is validly formed. - * The "verifier" functions, further down in the file, have to be more - * paranoid. - * - * We expect that mblen() does not need to examine more than the first byte - * of the character to discover the correct length. GB18030 is an exception - * to that rule, though, as it also looks at second byte. But even that - * behaves in a predictable way, if you only pass the first byte: it will - * treat 4-byte encoded characters as two 2-byte encoded characters, which is - * good enough for all current uses. - * - * Note: for the display output of psql to work properly, the return values - * of the dsplen functions must conform to the Unicode standard. In particular - * the NUL character is zero width and control characters are generally - * width -1. It is recommended that non-ASCII encodings refer their ASCII - * subset to the ASCII routines to ensure consistency. - */ - -/* - * SQL/ASCII - */ -static int -pg_ascii2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - *to++ = *from++; - len--; - cnt++; - } - *to = 0; - return cnt; -} - -static int -pg_ascii_mblen(const unsigned char *s) -{ - return 1; -} - -static int -pg_ascii_dsplen(const unsigned char *s) -{ - if (*s == '\0') - return 0; - if (*s < 0x20 || *s == 0x7f) - return -1; - - return 1; -} - -/* - * EUC - */ -static int -pg_euc2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - if (*from == SS2 && len >= 2) /* JIS X 0201 (so called "1 byte - * KANA") */ - { - from++; - *to = (SS2 << 8) | *from++; - len -= 2; - } - else if (*from == SS3 && len >= 3) /* JIS X 0212 KANJI */ - { - from++; - *to = (SS3 << 16) | (*from++ << 8); - *to |= *from++; - len -= 3; - } - else if (IS_HIGHBIT_SET(*from) && len >= 2) /* JIS X 0208 KANJI */ - { - *to = *from++ << 8; - *to |= *from++; - len -= 2; - } - else /* must be ASCII */ - { - *to = *from++; - len--; - } - to++; - cnt++; - } - *to = 0; - return cnt; -} - -static inline int -pg_euc_mblen(const unsigned char *s) -{ - int len; - - if (*s == SS2) - len = 2; - else if (*s == SS3) - len = 3; - else if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = 1; - return len; -} - -static inline int -pg_euc_dsplen(const unsigned char *s) -{ - int len; - - if (*s == SS2) - len = 2; - else if (*s == SS3) - len = 2; - else if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = pg_ascii_dsplen(s); - return len; -} - -/* - * EUC_JP - */ -static int -pg_eucjp2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - return pg_euc2wchar_with_len(from, to, len); -} - -static int -pg_eucjp_mblen(const unsigned char *s) -{ - return pg_euc_mblen(s); -} - -static int -pg_eucjp_dsplen(const unsigned char *s) -{ - int len; - - if (*s == SS2) - len = 1; - else if (*s == SS3) - len = 2; - else if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = pg_ascii_dsplen(s); - return len; -} - -/* - * EUC_KR - */ -static int -pg_euckr2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - return pg_euc2wchar_with_len(from, to, len); -} - -static int -pg_euckr_mblen(const unsigned char *s) -{ - return pg_euc_mblen(s); -} - -static int -pg_euckr_dsplen(const unsigned char *s) -{ - return pg_euc_dsplen(s); -} - -/* - * EUC_CN - * - */ -static int -pg_euccn2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - if (*from == SS2 && len >= 3) /* code set 2 (unused?) */ - { - from++; - *to = (SS2 << 16) | (*from++ << 8); - *to |= *from++; - len -= 3; - } - else if (*from == SS3 && len >= 3) /* code set 3 (unused ?) */ - { - from++; - *to = (SS3 << 16) | (*from++ << 8); - *to |= *from++; - len -= 3; - } - else if (IS_HIGHBIT_SET(*from) && len >= 2) /* code set 1 */ - { - *to = *from++ << 8; - *to |= *from++; - len -= 2; - } - else - { - *to = *from++; - len--; - } - to++; - cnt++; - } - *to = 0; - return cnt; -} - -static int -pg_euccn_mblen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = 1; - return len; -} - -static int -pg_euccn_dsplen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = pg_ascii_dsplen(s); - return len; -} - -/* - * EUC_TW - * - */ -static int -pg_euctw2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - if (*from == SS2 && len >= 4) /* code set 2 */ - { - from++; - *to = (((uint32) SS2) << 24) | (*from++ << 16); - *to |= *from++ << 8; - *to |= *from++; - len -= 4; - } - else if (*from == SS3 && len >= 3) /* code set 3 (unused?) */ - { - from++; - *to = (SS3 << 16) | (*from++ << 8); - *to |= *from++; - len -= 3; - } - else if (IS_HIGHBIT_SET(*from) && len >= 2) /* code set 2 */ - { - *to = *from++ << 8; - *to |= *from++; - len -= 2; - } - else - { - *to = *from++; - len--; - } - to++; - cnt++; - } - *to = 0; - return cnt; -} - -static int -pg_euctw_mblen(const unsigned char *s) -{ - int len; - - if (*s == SS2) - len = 4; - else if (*s == SS3) - len = 3; - else if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = 1; - return len; -} - -static int -pg_euctw_dsplen(const unsigned char *s) -{ - int len; - - if (*s == SS2) - len = 2; - else if (*s == SS3) - len = 2; - else if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = pg_ascii_dsplen(s); - return len; -} - -/* - * Convert pg_wchar to EUC_* encoding. - * caller must allocate enough space for "to", including a trailing zero! - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_wchar2euc_with_len(const pg_wchar *from, unsigned char *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - unsigned char c; - - if ((c = (*from >> 24))) - { - *to++ = c; - *to++ = (*from >> 16) & 0xff; - *to++ = (*from >> 8) & 0xff; - *to++ = *from & 0xff; - cnt += 4; - } - else if ((c = (*from >> 16))) - { - *to++ = c; - *to++ = (*from >> 8) & 0xff; - *to++ = *from & 0xff; - cnt += 3; - } - else if ((c = (*from >> 8))) - { - *to++ = c; - *to++ = *from & 0xff; - cnt += 2; - } - else - { - *to++ = *from; - cnt++; - } - from++; - len--; - } - *to = 0; - return cnt; -} - - -/* - * JOHAB - */ -static int -pg_johab_mblen(const unsigned char *s) -{ - return pg_euc_mblen(s); -} - -static int -pg_johab_dsplen(const unsigned char *s) -{ - return pg_euc_dsplen(s); -} - -/* - * convert UTF8 string to pg_wchar (UCS-4) - * caller must allocate enough space for "to", including a trailing zero! - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_utf2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - uint32 c1, - c2, - c3, - c4; - - while (len > 0 && *from) - { - if ((*from & 0x80) == 0) - { - *to = *from++; - len--; - } - else if ((*from & 0xe0) == 0xc0) - { - if (len < 2) - break; /* drop trailing incomplete char */ - c1 = *from++ & 0x1f; - c2 = *from++ & 0x3f; - *to = (c1 << 6) | c2; - len -= 2; - } - else if ((*from & 0xf0) == 0xe0) - { - if (len < 3) - break; /* drop trailing incomplete char */ - c1 = *from++ & 0x0f; - c2 = *from++ & 0x3f; - c3 = *from++ & 0x3f; - *to = (c1 << 12) | (c2 << 6) | c3; - len -= 3; - } - else if ((*from & 0xf8) == 0xf0) - { - if (len < 4) - break; /* drop trailing incomplete char */ - c1 = *from++ & 0x07; - c2 = *from++ & 0x3f; - c3 = *from++ & 0x3f; - c4 = *from++ & 0x3f; - *to = (c1 << 18) | (c2 << 12) | (c3 << 6) | c4; - len -= 4; - } - else - { - /* treat a bogus char as length 1; not ours to raise error */ - *to = *from++; - len--; - } - to++; - cnt++; - } - *to = 0; - return cnt; -} - - -/* - * Map a Unicode code point to UTF-8. utf8string must have 4 bytes of - * space allocated. - */ -unsigned char * -unicode_to_utf8(pg_wchar c, unsigned char *utf8string) -{ - if (c <= 0x7F) - { - utf8string[0] = c; - } - else if (c <= 0x7FF) - { - utf8string[0] = 0xC0 | ((c >> 6) & 0x1F); - utf8string[1] = 0x80 | (c & 0x3F); - } - else if (c <= 0xFFFF) - { - utf8string[0] = 0xE0 | ((c >> 12) & 0x0F); - utf8string[1] = 0x80 | ((c >> 6) & 0x3F); - utf8string[2] = 0x80 | (c & 0x3F); - } - else - { - utf8string[0] = 0xF0 | ((c >> 18) & 0x07); - utf8string[1] = 0x80 | ((c >> 12) & 0x3F); - utf8string[2] = 0x80 | ((c >> 6) & 0x3F); - utf8string[3] = 0x80 | (c & 0x3F); - } - - return utf8string; -} - -/* - * Trivial conversion from pg_wchar to UTF-8. - * caller should allocate enough space for "to" - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_wchar2utf_with_len(const pg_wchar *from, unsigned char *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - int char_len; - - unicode_to_utf8(*from, to); - char_len = pg_utf_mblen(to); - cnt += char_len; - to += char_len; - from++; - len--; - } - *to = 0; - return cnt; -} - -/* - * Return the byte length of a UTF8 character pointed to by s - * - * Note: in the current implementation we do not support UTF8 sequences - * of more than 4 bytes; hence do NOT return a value larger than 4. - * We return "1" for any leading byte that is either flat-out illegal or - * indicates a length larger than we support. - * - * pg_utf2wchar_with_len(), utf8_to_unicode(), pg_utf8_islegal(), and perhaps - * other places would need to be fixed to change this. - */ -int -pg_utf_mblen(const unsigned char *s) -{ - int len; - - if ((*s & 0x80) == 0) - len = 1; - else if ((*s & 0xe0) == 0xc0) - len = 2; - else if ((*s & 0xf0) == 0xe0) - len = 3; - else if ((*s & 0xf8) == 0xf0) - len = 4; -#ifdef NOT_USED - else if ((*s & 0xfc) == 0xf8) - len = 5; - else if ((*s & 0xfe) == 0xfc) - len = 6; -#endif - else - len = 1; - return len; -} - -/* - * This is an implementation of wcwidth() and wcswidth() as defined in - * "The Single UNIX Specification, Version 2, The Open Group, 1997" - * <http://www.unix.org/online.html> - * - * Markus Kuhn -- 2001-09-08 -- public domain - * - * customised for PostgreSQL - * - * original available at : http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c - */ - -struct mbinterval -{ - unsigned short first; - unsigned short last; -}; - -/* auxiliary function for binary search in interval table */ -static int -mbbisearch(pg_wchar ucs, const struct mbinterval *table, int max) -{ - int min = 0; - int mid; - - if (ucs < table[0].first || ucs > table[max].last) - return 0; - while (max >= min) - { - mid = (min + max) / 2; - if (ucs > table[mid].last) - min = mid + 1; - else if (ucs < table[mid].first) - max = mid - 1; - else - return 1; - } - - return 0; -} - - -/* The following functions define the column width of an ISO 10646 - * character as follows: - * - * - The null character (U+0000) has a column width of 0. - * - * - Other C0/C1 control characters and DEL will lead to a return - * value of -1. - * - * - Non-spacing and enclosing combining characters (general - * category code Mn or Me in the Unicode database) have a - * column width of 0. - * - * - Other format characters (general category code Cf in the Unicode - * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. - * - * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) - * have a column width of 0. - * - * - Spacing characters in the East Asian Wide (W) or East Asian - * FullWidth (F) category as defined in Unicode Technical - * Report #11 have a column width of 2. - * - * - All remaining characters (including all printable - * ISO 8859-1 and WGL4 characters, Unicode control characters, - * etc.) have a column width of 1. - * - * This implementation assumes that wchar_t characters are encoded - * in ISO 10646. - */ - -static int -ucs_wcwidth(pg_wchar ucs) -{ -#include "common/unicode_combining_table.h" - - /* test for 8-bit control characters */ - if (ucs == 0) - return 0; - - if (ucs < 0x20 || (ucs >= 0x7f && ucs < 0xa0) || ucs > 0x0010ffff) - return -1; - - /* binary search in table of non-spacing characters */ - if (mbbisearch(ucs, combining, - sizeof(combining) / sizeof(struct mbinterval) - 1)) - return 0; - - /* - * if we arrive here, ucs is not a combining or C0/C1 control character - */ - - return 1 + - (ucs >= 0x1100 && - (ucs <= 0x115f || /* Hangul Jamo init. consonants */ - (ucs >= 0x2e80 && ucs <= 0xa4cf && (ucs & ~0x0011) != 0x300a && - ucs != 0x303f) || /* CJK ... Yi */ - (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */ - (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility - * Ideographs */ - (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */ - (ucs >= 0xff00 && ucs <= 0xff5f) || /* Fullwidth Forms */ - (ucs >= 0xffe0 && ucs <= 0xffe6) || - (ucs >= 0x20000 && ucs <= 0x2ffff))); -} - -/* - * Convert a UTF-8 character to a Unicode code point. - * This is a one-character version of pg_utf2wchar_with_len. - * - * No error checks here, c must point to a long-enough string. - */ -pg_wchar -utf8_to_unicode(const unsigned char *c) -{ - if ((*c & 0x80) == 0) - return (pg_wchar) c[0]; - else if ((*c & 0xe0) == 0xc0) - return (pg_wchar) (((c[0] & 0x1f) << 6) | - (c[1] & 0x3f)); - else if ((*c & 0xf0) == 0xe0) - return (pg_wchar) (((c[0] & 0x0f) << 12) | - ((c[1] & 0x3f) << 6) | - (c[2] & 0x3f)); - else if ((*c & 0xf8) == 0xf0) - return (pg_wchar) (((c[0] & 0x07) << 18) | - ((c[1] & 0x3f) << 12) | - ((c[2] & 0x3f) << 6) | - (c[3] & 0x3f)); - else - /* that is an invalid code on purpose */ - return 0xffffffff; -} - -static int -pg_utf_dsplen(const unsigned char *s) -{ - return ucs_wcwidth(utf8_to_unicode(s)); -} - -/* - * convert mule internal code to pg_wchar - * caller should allocate enough space for "to" - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - if (IS_LC1(*from) && len >= 2) - { - *to = *from++ << 16; - *to |= *from++; - len -= 2; - } - else if (IS_LCPRV1(*from) && len >= 3) - { - from++; - *to = *from++ << 16; - *to |= *from++; - len -= 3; - } - else if (IS_LC2(*from) && len >= 3) - { - *to = *from++ << 16; - *to |= *from++ << 8; - *to |= *from++; - len -= 3; - } - else if (IS_LCPRV2(*from) && len >= 4) - { - from++; - *to = *from++ << 16; - *to |= *from++ << 8; - *to |= *from++; - len -= 4; - } - else - { /* assume ASCII */ - *to = (unsigned char) *from++; - len--; - } - to++; - cnt++; - } - *to = 0; - return cnt; -} - -/* - * convert pg_wchar to mule internal code - * caller should allocate enough space for "to" - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_wchar2mule_with_len(const pg_wchar *from, unsigned char *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - unsigned char lb; - - lb = (*from >> 16) & 0xff; - if (IS_LC1(lb)) - { - *to++ = lb; - *to++ = *from & 0xff; - cnt += 2; - } - else if (IS_LC2(lb)) - { - *to++ = lb; - *to++ = (*from >> 8) & 0xff; - *to++ = *from & 0xff; - cnt += 3; - } - else if (IS_LCPRV1_A_RANGE(lb)) - { - *to++ = LCPRV1_A; - *to++ = lb; - *to++ = *from & 0xff; - cnt += 3; - } - else if (IS_LCPRV1_B_RANGE(lb)) - { - *to++ = LCPRV1_B; - *to++ = lb; - *to++ = *from & 0xff; - cnt += 3; - } - else if (IS_LCPRV2_A_RANGE(lb)) - { - *to++ = LCPRV2_A; - *to++ = lb; - *to++ = (*from >> 8) & 0xff; - *to++ = *from & 0xff; - cnt += 4; - } - else if (IS_LCPRV2_B_RANGE(lb)) - { - *to++ = LCPRV2_B; - *to++ = lb; - *to++ = (*from >> 8) & 0xff; - *to++ = *from & 0xff; - cnt += 4; - } - else - { - *to++ = *from & 0xff; - cnt += 1; - } - from++; - len--; - } - *to = 0; - return cnt; -} - -int -pg_mule_mblen(const unsigned char *s) -{ - int len; - - if (IS_LC1(*s)) - len = 2; - else if (IS_LCPRV1(*s)) - len = 3; - else if (IS_LC2(*s)) - len = 3; - else if (IS_LCPRV2(*s)) - len = 4; - else - len = 1; /* assume ASCII */ - return len; -} - -static int -pg_mule_dsplen(const unsigned char *s) -{ - int len; - - /* - * Note: it's not really appropriate to assume that all multibyte charsets - * are double-wide on screen. But this seems an okay approximation for - * the MULE charsets we currently support. - */ - - if (IS_LC1(*s)) - len = 1; - else if (IS_LCPRV1(*s)) - len = 1; - else if (IS_LC2(*s)) - len = 2; - else if (IS_LCPRV2(*s)) - len = 2; - else - len = 1; /* assume ASCII */ - - return len; -} - -/* - * ISO8859-1 - */ -static int -pg_latin12wchar_with_len(const unsigned char *from, pg_wchar *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - *to++ = *from++; - len--; - cnt++; - } - *to = 0; - return cnt; -} - -/* - * Trivial conversion from pg_wchar to single byte encoding. Just ignores - * high bits. - * caller should allocate enough space for "to" - * len: length of from. - * "from" not necessarily null terminated. - */ -static int -pg_wchar2single_with_len(const pg_wchar *from, unsigned char *to, int len) -{ - int cnt = 0; - - while (len > 0 && *from) - { - *to++ = *from++; - len--; - cnt++; - } - *to = 0; - return cnt; -} - -static int -pg_latin1_mblen(const unsigned char *s) -{ - return 1; -} - -static int -pg_latin1_dsplen(const unsigned char *s) -{ - return pg_ascii_dsplen(s); -} - -/* - * SJIS - */ -static int -pg_sjis_mblen(const unsigned char *s) -{ - int len; - - if (*s >= 0xa1 && *s <= 0xdf) - len = 1; /* 1 byte kana? */ - else if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = 1; /* should be ASCII */ - return len; -} - -static int -pg_sjis_dsplen(const unsigned char *s) -{ - int len; - - if (*s >= 0xa1 && *s <= 0xdf) - len = 1; /* 1 byte kana? */ - else if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = pg_ascii_dsplen(s); /* should be ASCII */ - return len; -} - -/* - * Big5 - */ -static int -pg_big5_mblen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = 1; /* should be ASCII */ - return len; -} - -static int -pg_big5_dsplen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = pg_ascii_dsplen(s); /* should be ASCII */ - return len; -} - -/* - * GBK - */ -static int -pg_gbk_mblen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = 1; /* should be ASCII */ - return len; -} - -static int -pg_gbk_dsplen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* kanji? */ - else - len = pg_ascii_dsplen(s); /* should be ASCII */ - return len; -} - -/* - * UHC - */ -static int -pg_uhc_mblen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* 2byte? */ - else - len = 1; /* should be ASCII */ - return len; -} - -static int -pg_uhc_dsplen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; /* 2byte? */ - else - len = pg_ascii_dsplen(s); /* should be ASCII */ - return len; -} - -/* - * GB18030 - * Added by Bill Huang <bhuang@redhat.com>,<bill_huanghb@ybb.ne.jp> - */ - -/* - * Unlike all other mblen() functions, this also looks at the second byte of - * the input. However, if you only pass the first byte of a multi-byte - * string, and \0 as the second byte, this still works in a predictable way: - * a 4-byte character will be reported as two 2-byte characters. That's - * enough for all current uses, as a client-only encoding. It works that - * way, because in any valid 4-byte GB18030-encoded character, the third and - * fourth byte look like a 2-byte encoded character, when looked at - * separately. - */ -static int -pg_gb18030_mblen(const unsigned char *s) -{ - int len; - - if (!IS_HIGHBIT_SET(*s)) - len = 1; /* ASCII */ - else if (*(s + 1) >= 0x30 && *(s + 1) <= 0x39) - len = 4; - else - len = 2; - return len; -} - -static int -pg_gb18030_dsplen(const unsigned char *s) -{ - int len; - - if (IS_HIGHBIT_SET(*s)) - len = 2; - else - len = pg_ascii_dsplen(s); /* ASCII */ - return len; -} - -/* - *------------------------------------------------------------------- - * multibyte sequence validators - * - * These functions accept "s", a pointer to the first byte of a string, - * and "len", the remaining length of the string. If there is a validly - * encoded character beginning at *s, return its length in bytes; else - * return -1. - * - * The functions can assume that len > 0 and that *s != '\0', but they must - * test for and reject zeroes in any additional bytes of a multibyte character. - * - * Note that this definition allows the function for a single-byte - * encoding to be just "return 1". - *------------------------------------------------------------------- - */ - -static int -pg_ascii_verifier(const unsigned char *s, int len) -{ - return 1; -} - -#define IS_EUC_RANGE_VALID(c) ((c) >= 0xa1 && (c) <= 0xfe) - -static int -pg_eucjp_verifier(const unsigned char *s, int len) -{ - int l; - unsigned char c1, - c2; - - c1 = *s++; - - switch (c1) - { - case SS2: /* JIS X 0201 */ - l = 2; - if (l > len) - return -1; - c2 = *s++; - if (c2 < 0xa1 || c2 > 0xdf) - return -1; - break; - - case SS3: /* JIS X 0212 */ - l = 3; - if (l > len) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - break; - - default: - if (IS_HIGHBIT_SET(c1)) /* JIS X 0208? */ - { - l = 2; - if (l > len) - return -1; - if (!IS_EUC_RANGE_VALID(c1)) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - } - else - /* must be ASCII */ - { - l = 1; - } - break; - } - - return l; -} - -static int -pg_euckr_verifier(const unsigned char *s, int len) -{ - int l; - unsigned char c1, - c2; - - c1 = *s++; - - if (IS_HIGHBIT_SET(c1)) - { - l = 2; - if (l > len) - return -1; - if (!IS_EUC_RANGE_VALID(c1)) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - } - else - /* must be ASCII */ - { - l = 1; - } - - return l; -} - -/* EUC-CN byte sequences are exactly same as EUC-KR */ -#define pg_euccn_verifier pg_euckr_verifier - -static int -pg_euctw_verifier(const unsigned char *s, int len) -{ - int l; - unsigned char c1, - c2; - - c1 = *s++; - - switch (c1) - { - case SS2: /* CNS 11643 Plane 1-7 */ - l = 4; - if (l > len) - return -1; - c2 = *s++; - if (c2 < 0xa1 || c2 > 0xa7) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - break; - - case SS3: /* unused */ - return -1; - - default: - if (IS_HIGHBIT_SET(c1)) /* CNS 11643 Plane 1 */ - { - l = 2; - if (l > len) - return -1; - /* no further range check on c1? */ - c2 = *s++; - if (!IS_EUC_RANGE_VALID(c2)) - return -1; - } - else - /* must be ASCII */ - { - l = 1; - } - break; - } - return l; -} - -static int -pg_johab_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - unsigned char c; - - l = mbl = pg_johab_mblen(s); - - if (len < l) - return -1; - - if (!IS_HIGHBIT_SET(*s)) - return mbl; - - while (--l > 0) - { - c = *++s; - if (!IS_EUC_RANGE_VALID(c)) - return -1; - } - return mbl; -} - -static int -pg_mule_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - unsigned char c; - - l = mbl = pg_mule_mblen(s); - - if (len < l) - return -1; - - while (--l > 0) - { - c = *++s; - if (!IS_HIGHBIT_SET(c)) - return -1; - } - return mbl; -} - -static int -pg_latin1_verifier(const unsigned char *s, int len) -{ - return 1; -} - -static int -pg_sjis_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - unsigned char c1, - c2; - - l = mbl = pg_sjis_mblen(s); - - if (len < l) - return -1; - - if (l == 1) /* pg_sjis_mblen already verified it */ - return mbl; - - c1 = *s++; - c2 = *s; - if (!ISSJISHEAD(c1) || !ISSJISTAIL(c2)) - return -1; - return mbl; -} - -static int -pg_big5_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - - l = mbl = pg_big5_mblen(s); - - if (len < l) - return -1; - - while (--l > 0) - { - if (*++s == '\0') - return -1; - } - - return mbl; -} - -static int -pg_gbk_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - - l = mbl = pg_gbk_mblen(s); - - if (len < l) - return -1; - - while (--l > 0) - { - if (*++s == '\0') - return -1; - } - - return mbl; -} - -static int -pg_uhc_verifier(const unsigned char *s, int len) -{ - int l, - mbl; - - l = mbl = pg_uhc_mblen(s); - - if (len < l) - return -1; - - while (--l > 0) - { - if (*++s == '\0') - return -1; - } - - return mbl; -} - -static int -pg_gb18030_verifier(const unsigned char *s, int len) -{ - int l; - - if (!IS_HIGHBIT_SET(*s)) - l = 1; /* ASCII */ - else if (len >= 4 && *(s + 1) >= 0x30 && *(s + 1) <= 0x39) - { - /* Should be 4-byte, validate remaining bytes */ - if (*s >= 0x81 && *s <= 0xfe && - *(s + 2) >= 0x81 && *(s + 2) <= 0xfe && - *(s + 3) >= 0x30 && *(s + 3) <= 0x39) - l = 4; - else - l = -1; - } - else if (len >= 2 && *s >= 0x81 && *s <= 0xfe) - { - /* Should be 2-byte, validate */ - if ((*(s + 1) >= 0x40 && *(s + 1) <= 0x7e) || - (*(s + 1) >= 0x80 && *(s + 1) <= 0xfe)) - l = 2; - else - l = -1; - } - else - l = -1; - return l; -} - -static int -pg_utf8_verifier(const unsigned char *s, int len) -{ - int l = pg_utf_mblen(s); - - if (len < l) - return -1; - - if (!pg_utf8_islegal(s, l)) - return -1; - - return l; -} - -/* - * Check for validity of a single UTF-8 encoded character - * - * This directly implements the rules in RFC3629. The bizarre-looking - * restrictions on the second byte are meant to ensure that there isn't - * more than one encoding of a given Unicode character point; that is, - * you may not use a longer-than-necessary byte sequence with high order - * zero bits to represent a character that would fit in fewer bytes. - * To do otherwise is to create security hazards (eg, create an apparent - * non-ASCII character that decodes to plain ASCII). - * - * length is assumed to have been obtained by pg_utf_mblen(), and the - * caller must have checked that that many bytes are present in the buffer. - */ -bool -pg_utf8_islegal(const unsigned char *source, int length) -{ - unsigned char a; - - switch (length) - { - default: - /* reject lengths 5 and 6 for now */ - return false; - case 4: - a = source[3]; - if (a < 0x80 || a > 0xBF) - return false; - /* FALL THRU */ - case 3: - a = source[2]; - if (a < 0x80 || a > 0xBF) - return false; - /* FALL THRU */ - case 2: - a = source[1]; - switch (*source) - { - case 0xE0: - if (a < 0xA0 || a > 0xBF) - return false; - break; - case 0xED: - if (a < 0x80 || a > 0x9F) - return false; - break; - case 0xF0: - if (a < 0x90 || a > 0xBF) - return false; - break; - case 0xF4: - if (a < 0x80 || a > 0x8F) - return false; - break; - default: - if (a < 0x80 || a > 0xBF) - return false; - break; - } - /* FALL THRU */ - case 1: - a = *source; - if (a >= 0x80 && a < 0xC2) - return false; - if (a > 0xF4) - return false; - break; - } - return true; -} - -#ifndef FRONTEND - -/* - * Generic character incrementer function. - * - * Not knowing anything about the properties of the encoding in use, we just - * keep incrementing the last byte until we get a validly-encoded result, - * or we run out of values to try. We don't bother to try incrementing - * higher-order bytes, so there's no growth in runtime for wider characters. - * (If we did try to do that, we'd need to consider the likelihood that 255 - * is not a valid final byte in the encoding.) - */ -static bool -pg_generic_charinc(unsigned char *charptr, int len) -{ - unsigned char *lastbyte = charptr + len - 1; - mbverifier mbverify; - - /* We can just invoke the character verifier directly. */ - mbverify = pg_wchar_table[GetDatabaseEncoding()].mbverify; - - while (*lastbyte < (unsigned char) 255) - { - (*lastbyte)++; - if ((*mbverify) (charptr, len) == len) - return true; - } - - return false; -} - -/* - * UTF-8 character incrementer function. - * - * For a one-byte character less than 0x7F, we just increment the byte. - * - * For a multibyte character, every byte but the first must fall between 0x80 - * and 0xBF; and the first byte must be between 0xC0 and 0xF4. We increment - * the last byte that's not already at its maximum value. If we can't find a - * byte that's less than the maximum allowable value, we simply fail. We also - * need some special-case logic to skip regions used for surrogate pair - * handling, as those should not occur in valid UTF-8. - * - * Note that we don't reset lower-order bytes back to their minimums, since - * we can't afford to make an exhaustive search (see make_greater_string). - */ -static bool -pg_utf8_increment(unsigned char *charptr, int length) -{ - unsigned char a; - unsigned char limit; - - switch (length) - { - default: - /* reject lengths 5 and 6 for now */ - return false; - case 4: - a = charptr[3]; - if (a < 0xBF) - { - charptr[3]++; - break; - } - /* FALL THRU */ - case 3: - a = charptr[2]; - if (a < 0xBF) - { - charptr[2]++; - break; - } - /* FALL THRU */ - case 2: - a = charptr[1]; - switch (*charptr) - { - case 0xED: - limit = 0x9F; - break; - case 0xF4: - limit = 0x8F; - break; - default: - limit = 0xBF; - break; - } - if (a < limit) - { - charptr[1]++; - break; - } - /* FALL THRU */ - case 1: - a = *charptr; - if (a == 0x7F || a == 0xDF || a == 0xEF || a == 0xF4) - return false; - charptr[0]++; - break; - } - - return true; -} - -/* - * EUC-JP character incrementer function. - * - * If the sequence starts with SS2 (0x8e), it must be a two-byte sequence - * representing JIS X 0201 characters with the second byte ranging between - * 0xa1 and 0xdf. We just increment the last byte if it's less than 0xdf, - * and otherwise rewrite the whole sequence to 0xa1 0xa1. - * - * If the sequence starts with SS3 (0x8f), it must be a three-byte sequence - * in which the last two bytes range between 0xa1 and 0xfe. The last byte - * is incremented if possible, otherwise the second-to-last byte. - * - * If the sequence starts with a value other than the above and its MSB - * is set, it must be a two-byte sequence representing JIS X 0208 characters - * with both bytes ranging between 0xa1 and 0xfe. The last byte is - * incremented if possible, otherwise the second-to-last byte. - * - * Otherwise, the sequence is a single-byte ASCII character. It is - * incremented up to 0x7f. - */ -static bool -pg_eucjp_increment(unsigned char *charptr, int length) -{ - unsigned char c1, - c2; - int i; - - c1 = *charptr; - - switch (c1) - { - case SS2: /* JIS X 0201 */ - if (length != 2) - return false; - - c2 = charptr[1]; - - if (c2 >= 0xdf) - charptr[0] = charptr[1] = 0xa1; - else if (c2 < 0xa1) - charptr[1] = 0xa1; - else - charptr[1]++; - break; - - case SS3: /* JIS X 0212 */ - if (length != 3) - return false; - - for (i = 2; i > 0; i--) - { - c2 = charptr[i]; - if (c2 < 0xa1) - { - charptr[i] = 0xa1; - return true; - } - else if (c2 < 0xfe) - { - charptr[i]++; - return true; - } - } - - /* Out of 3-byte code region */ - return false; - - default: - if (IS_HIGHBIT_SET(c1)) /* JIS X 0208? */ - { - if (length != 2) - return false; - - for (i = 1; i >= 0; i--) - { - c2 = charptr[i]; - if (c2 < 0xa1) - { - charptr[i] = 0xa1; - return true; - } - else if (c2 < 0xfe) - { - charptr[i]++; - return true; - } - } - - /* Out of 2 byte code region */ - return false; - } - else - { /* ASCII, single byte */ - if (c1 > 0x7e) - return false; - (*charptr)++; - } - break; - } - - return true; -} -#endif /* !FRONTEND */ - - -/* - *------------------------------------------------------------------- - * encoding info table - * XXX must be sorted by the same order as enum pg_enc (in mb/pg_wchar.h) - *------------------------------------------------------------------- - */ -const pg_wchar_tbl pg_wchar_table[] = { - {pg_ascii2wchar_with_len, pg_wchar2single_with_len, pg_ascii_mblen, pg_ascii_dsplen, pg_ascii_verifier, 1}, /* PG_SQL_ASCII */ - {pg_eucjp2wchar_with_len, pg_wchar2euc_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JP */ - {pg_euccn2wchar_with_len, pg_wchar2euc_with_len, pg_euccn_mblen, pg_euccn_dsplen, pg_euccn_verifier, 2}, /* PG_EUC_CN */ - {pg_euckr2wchar_with_len, pg_wchar2euc_with_len, pg_euckr_mblen, pg_euckr_dsplen, pg_euckr_verifier, 3}, /* PG_EUC_KR */ - {pg_euctw2wchar_with_len, pg_wchar2euc_with_len, pg_euctw_mblen, pg_euctw_dsplen, pg_euctw_verifier, 4}, /* PG_EUC_TW */ - {pg_eucjp2wchar_with_len, pg_wchar2euc_with_len, pg_eucjp_mblen, pg_eucjp_dsplen, pg_eucjp_verifier, 3}, /* PG_EUC_JIS_2004 */ - {pg_utf2wchar_with_len, pg_wchar2utf_with_len, pg_utf_mblen, pg_utf_dsplen, pg_utf8_verifier, 4}, /* PG_UTF8 */ - {pg_mule2wchar_with_len, pg_wchar2mule_with_len, pg_mule_mblen, pg_mule_dsplen, pg_mule_verifier, 4}, /* PG_MULE_INTERNAL */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN1 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN2 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN3 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN4 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN5 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN6 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN7 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN8 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN9 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_LATIN10 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1256 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1258 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN866 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN874 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8R */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1251 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1252 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-5 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-6 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-7 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* ISO-8859-8 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1250 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1253 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1254 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1255 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_WIN1257 */ - {pg_latin12wchar_with_len, pg_wchar2single_with_len, pg_latin1_mblen, pg_latin1_dsplen, pg_latin1_verifier, 1}, /* PG_KOI8U */ - {0, 0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2}, /* PG_SJIS */ - {0, 0, pg_big5_mblen, pg_big5_dsplen, pg_big5_verifier, 2}, /* PG_BIG5 */ - {0, 0, pg_gbk_mblen, pg_gbk_dsplen, pg_gbk_verifier, 2}, /* PG_GBK */ - {0, 0, pg_uhc_mblen, pg_uhc_dsplen, pg_uhc_verifier, 2}, /* PG_UHC */ - {0, 0, pg_gb18030_mblen, pg_gb18030_dsplen, pg_gb18030_verifier, 4}, /* PG_GB18030 */ - {0, 0, pg_johab_mblen, pg_johab_dsplen, pg_johab_verifier, 3}, /* PG_JOHAB */ - {0, 0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2} /* PG_SHIFT_JIS_2004 */ -}; - -/* returns the byte length of a word for mule internal code */ -int -pg_mic_mblen(const unsigned char *mbstr) -{ - return pg_mule_mblen(mbstr); -} - -/* - * Returns the byte length of a multibyte character. - */ -int -pg_encoding_mblen(int encoding, const char *mbstr) -{ - return (PG_VALID_ENCODING(encoding) ? - pg_wchar_table[encoding].mblen((const unsigned char *) mbstr) : - pg_wchar_table[PG_SQL_ASCII].mblen((const unsigned char *) mbstr)); -} - -/* - * Returns the display length of a multibyte character. - */ -int -pg_encoding_dsplen(int encoding, const char *mbstr) -{ - return (PG_VALID_ENCODING(encoding) ? - pg_wchar_table[encoding].dsplen((const unsigned char *) mbstr) : - pg_wchar_table[PG_SQL_ASCII].dsplen((const unsigned char *) mbstr)); -} - -/* - * Verify the first multibyte character of the given string. - * Return its byte length if good, -1 if bad. (See comments above for - * full details of the mbverify API.) - */ -int -pg_encoding_verifymb(int encoding, const char *mbstr, int len) -{ - return (PG_VALID_ENCODING(encoding) ? - pg_wchar_table[encoding].mbverify((const unsigned char *) mbstr, len) : - pg_wchar_table[PG_SQL_ASCII].mbverify((const unsigned char *) mbstr, len)); -} - -/* - * fetch maximum length of a given encoding - */ -int -pg_encoding_max_length(int encoding) -{ - Assert(PG_VALID_ENCODING(encoding)); - - return pg_wchar_table[encoding].maxmblen; -} - -#ifndef FRONTEND - -/* - * fetch maximum length of the encoding for the current database - */ -int -pg_database_encoding_max_length(void) -{ - return pg_wchar_table[GetDatabaseEncoding()].maxmblen; -} - -/* - * get the character incrementer for the encoding for the current database - */ -mbcharacter_incrementer -pg_database_encoding_character_incrementer(void) -{ - /* - * Eventually it might be best to add a field to pg_wchar_table[], but for - * now we just use a switch. - */ - switch (GetDatabaseEncoding()) - { - case PG_UTF8: - return pg_utf8_increment; - - case PG_EUC_JP: - return pg_eucjp_increment; - - default: - return pg_generic_charinc; - } -} - -/* - * Verify mbstr to make sure that it is validly encoded in the current - * database encoding. Otherwise same as pg_verify_mbstr(). - */ -bool -pg_verifymbstr(const char *mbstr, int len, bool noError) -{ - return - pg_verify_mbstr_len(GetDatabaseEncoding(), mbstr, len, noError) >= 0; -} - -/* - * Verify mbstr to make sure that it is validly encoded in the specified - * encoding. - */ -bool -pg_verify_mbstr(int encoding, const char *mbstr, int len, bool noError) -{ - return pg_verify_mbstr_len(encoding, mbstr, len, noError) >= 0; -} - -/* - * Verify mbstr to make sure that it is validly encoded in the specified - * encoding. - * - * mbstr is not necessarily zero terminated; length of mbstr is - * specified by len. - * - * If OK, return length of string in the encoding. - * If a problem is found, return -1 when noError is - * true; when noError is false, ereport() a descriptive message. - */ -int -pg_verify_mbstr_len(int encoding, const char *mbstr, int len, bool noError) -{ - mbverifier mbverify; - int mb_len; - - Assert(PG_VALID_ENCODING(encoding)); - - /* - * In single-byte encodings, we need only reject nulls (\0). - */ - if (pg_encoding_max_length(encoding) <= 1) - { - const char *nullpos = memchr(mbstr, 0, len); - - if (nullpos == NULL) - return len; - if (noError) - return -1; - report_invalid_encoding(encoding, nullpos, 1); - } - - /* fetch function pointer just once */ - mbverify = pg_wchar_table[encoding].mbverify; - - mb_len = 0; - - while (len > 0) - { - int l; - - /* fast path for ASCII-subset characters */ - if (!IS_HIGHBIT_SET(*mbstr)) - { - if (*mbstr != '\0') - { - mb_len++; - mbstr++; - len--; - continue; - } - if (noError) - return -1; - report_invalid_encoding(encoding, mbstr, len); - } - - l = (*mbverify) ((const unsigned char *) mbstr, len); - - if (l < 0) - { - if (noError) - return -1; - report_invalid_encoding(encoding, mbstr, len); - } - - mbstr += l; - len -= l; - mb_len++; - } - return mb_len; -} - -/* - * check_encoding_conversion_args: check arguments of a conversion function - * - * "expected" arguments can be either an encoding ID or -1 to indicate that - * the caller will check whether it accepts the ID. - * - * Note: the errors here are not really user-facing, so elog instead of - * ereport seems sufficient. Also, we trust that the "expected" encoding - * arguments are valid encoding IDs, but we don't trust the actuals. - */ -void -check_encoding_conversion_args(int src_encoding, - int dest_encoding, - int len, - int expected_src_encoding, - int expected_dest_encoding) -{ - if (!PG_VALID_ENCODING(src_encoding)) - elog(ERROR, "invalid source encoding ID: %d", src_encoding); - if (src_encoding != expected_src_encoding && expected_src_encoding >= 0) - elog(ERROR, "expected source encoding \"%s\", but got \"%s\"", - pg_enc2name_tbl[expected_src_encoding].name, - pg_enc2name_tbl[src_encoding].name); - if (!PG_VALID_ENCODING(dest_encoding)) - elog(ERROR, "invalid destination encoding ID: %d", dest_encoding); - if (dest_encoding != expected_dest_encoding && expected_dest_encoding >= 0) - elog(ERROR, "expected destination encoding \"%s\", but got \"%s\"", - pg_enc2name_tbl[expected_dest_encoding].name, - pg_enc2name_tbl[dest_encoding].name); - if (len < 0) - elog(ERROR, "encoding conversion length must not be negative"); -} - -/* - * report_invalid_encoding: complain about invalid multibyte character - * - * note: len is remaining length of string, not length of character; - * len must be greater than zero, as we always examine the first byte. - */ -void -report_invalid_encoding(int encoding, const char *mbstr, int len) -{ - int l = pg_encoding_mblen(encoding, mbstr); - char buf[8 * 5 + 1]; - char *p = buf; - int j, - jlimit; - - jlimit = Min(l, len); - jlimit = Min(jlimit, 8); /* prevent buffer overrun */ - - for (j = 0; j < jlimit; j++) - { - p += sprintf(p, "0x%02x", (unsigned char) mbstr[j]); - if (j < jlimit - 1) - p += sprintf(p, " "); - } - - ereport(ERROR, - (errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE), - errmsg("invalid byte sequence for encoding \"%s\": %s", - pg_enc2name_tbl[encoding].name, - buf))); -} - -/* - * report_untranslatable_char: complain about untranslatable character - * - * note: len is remaining length of string, not length of character; - * len must be greater than zero, as we always examine the first byte. - */ -void -report_untranslatable_char(int src_encoding, int dest_encoding, - const char *mbstr, int len) -{ - int l = pg_encoding_mblen(src_encoding, mbstr); - char buf[8 * 5 + 1]; - char *p = buf; - int j, - jlimit; - - jlimit = Min(l, len); - jlimit = Min(jlimit, 8); /* prevent buffer overrun */ - - for (j = 0; j < jlimit; j++) - { - p += sprintf(p, "0x%02x", (unsigned char) mbstr[j]); - if (j < jlimit - 1) - p += sprintf(p, " "); - } - - ereport(ERROR, - (errcode(ERRCODE_UNTRANSLATABLE_CHARACTER), - errmsg("character with byte sequence %s in encoding \"%s\" has no equivalent in encoding \"%s\"", - buf, - pg_enc2name_tbl[src_encoding].name, - pg_enc2name_tbl[dest_encoding].name))); -} - -#endif /* !FRONTEND */ |