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pg_wchar.h
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/*------------------------------------------------------------------------- * * pg_wchar.h * multibyte-character support * * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/mb/pg_wchar.h * * NOTES * This is used both by the backend and by libpq, but should not be * included by libpq client programs. In particular, a libpq client * should not assume that the encoding IDs used by the version of libpq * it's linked to match up with the IDs declared here. * *------------------------------------------------------------------------- */ #ifndef PG_WCHAR_H #define PG_WCHAR_H /* * The pg_wchar type */ typedef unsigned int pg_wchar; /* * Maximum byte length of multibyte characters in any backend encoding */ #define MAX_MULTIBYTE_CHAR_LEN 4 /* * various definitions for EUC */ #define SS2 0x8e /* single shift 2 (JIS0201) */ #define SS3 0x8f /* single shift 3 (JIS0212) */ /* * SJIS validation macros */ #define ISSJISHEAD(c) (((c) >= 0x81 && (c) <= 0x9f) || ((c) >= 0xe0 && (c) <= 0xfc)) #define ISSJISTAIL(c) (((c) >= 0x40 && (c) <= 0x7e) || ((c) >= 0x80 && (c) <= 0xfc)) /*---------------------------------------------------- * MULE Internal Encoding (MIC) * * This encoding follows the design used within XEmacs; it is meant to * subsume many externally-defined character sets. Each character includes * identification of the character set it belongs to, so the encoding is * general but somewhat bulky. * * Currently PostgreSQL supports 5 types of MULE character sets: * * 1) 1-byte ASCII characters. Each byte is below 0x80. * * 2) "Official" single byte charsets such as ISO-8859-1 (Latin1). * Each MULE character consists of 2 bytes: LC1 + C1, where LC1 is * an identifier for the charset (in the range 0x81 to 0x8d) and C1 * is the character code (in the range 0xa0 to 0xff). * * 3) "Private" single byte charsets such as SISHENG. Each MULE * character consists of 3 bytes: LCPRV1 + LC12 + C1, where LCPRV1 * is a private-charset flag, LC12 is an identifier for the charset, * and C1 is the character code (in the range 0xa0 to 0xff). * LCPRV1 is either 0x9a (if LC12 is in the range 0xa0 to 0xdf) * or 0x9b (if LC12 is in the range 0xe0 to 0xef). * * 4) "Official" multibyte charsets such as JIS X0208. Each MULE * character consists of 3 bytes: LC2 + C1 + C2, where LC2 is * an identifier for the charset (in the range 0x90 to 0x99) and C1 * and C2 form the character code (each in the range 0xa0 to 0xff). * * 5) "Private" multibyte charsets such as CNS 11643-1992 Plane 3. * Each MULE character consists of 4 bytes: LCPRV2 + LC22 + C1 + C2, * where LCPRV2 is a private-charset flag, LC22 is an identifier for * the charset, and C1 and C2 form the character code (each in the range * 0xa0 to 0xff). LCPRV2 is either 0x9c (if LC22 is in the range 0xf0 * to 0xf4) or 0x9d (if LC22 is in the range 0xf5 to 0xfe). * * "Official" encodings are those that have been assigned code numbers by * the XEmacs project; "private" encodings have Postgres-specific charset * identifiers. * * See the "XEmacs Internals Manual", available at http://www.xemacs.org, * for more details. Note that for historical reasons, Postgres' * private-charset flag values do not match what XEmacs says they should be, * so this isn't really exactly MULE (not that private charsets would be * interoperable anyway). * * Note that XEmacs's implementation is different from what emacs does. * We follow emacs's implementation, rather than XEmacs's. *---------------------------------------------------- */ /* * Charset identifiers (also called "leading bytes" in the MULE documentation) */ /* * Charset IDs for official single byte encodings (0x81-0x8e) */ #define LC_ISO8859_1 0x81 /* ISO8859 Latin 1 */ #define LC_ISO8859_2 0x82 /* ISO8859 Latin 2 */ #define LC_ISO8859_3 0x83 /* ISO8859 Latin 3 */ #define LC_ISO8859_4 0x84 /* ISO8859 Latin 4 */ #define LC_TIS620 0x85 /* Thai (not supported yet) */ #define LC_ISO8859_7 0x86 /* Greek (not supported yet) */ #define LC_ISO8859_6 0x87 /* Arabic (not supported yet) */ #define LC_ISO8859_8 0x88 /* Hebrew (not supported yet) */ #define LC_JISX0201K 0x89 /* Japanese 1 byte kana */ #define LC_JISX0201R 0x8a /* Japanese 1 byte Roman */ /* Note that 0x8b seems to be unused as of Emacs 20.7. * However, there might be a chance that 0x8b could be used * in later versions of Emacs. */ #define LC_KOI8_R 0x8b /* Cyrillic KOI8-R */ #define LC_ISO8859_5 0x8c /* ISO8859 Cyrillic */ #define LC_ISO8859_9 0x8d /* ISO8859 Latin 5 (not supported yet) */ #define LC_ISO8859_15 0x8e /* ISO8859 Latin 15 (not supported yet) */ /* #define CONTROL_1 0x8f control characters (unused) */ /* Is a leading byte for "official" single byte encodings? */ #define IS_LC1(c) ((unsigned char)(c) >= 0x81 && (unsigned char)(c) <= 0x8d) /* * Charset IDs for official multibyte encodings (0x90-0x99) * 0x9a-0x9d are free. 0x9e and 0x9f are reserved. */ #define LC_JISX0208_1978 0x90 /* Japanese Kanji, old JIS (not supported) */ #define LC_GB2312_80 0x91 /* Chinese */ #define LC_JISX0208 0x92 /* Japanese Kanji (JIS X 0208) */ #define LC_KS5601 0x93 /* Korean */ #define LC_JISX0212 0x94 /* Japanese Kanji (JIS X 0212) */ #define LC_CNS11643_1 0x95 /* CNS 11643-1992 Plane 1 */ #define LC_CNS11643_2 0x96 /* CNS 11643-1992 Plane 2 */ #define LC_JISX0213_1 0x97 /* Japanese Kanji (JIS X 0213 Plane 1) * (not supported) */ #define LC_BIG5_1 0x98 /* Plane 1 Chinese traditional (not * supported) */ #define LC_BIG5_2 0x99 /* Plane 1 Chinese traditional (not * supported) */ /* Is a leading byte for "official" multibyte encodings? */ #define IS_LC2(c) ((unsigned char)(c) >= 0x90 && (unsigned char)(c) <= 0x99) /* * Postgres-specific prefix bytes for "private" single byte encodings * (According to the MULE docs, we should be using 0x9e for this) */ #define LCPRV1_A 0x9a #define LCPRV1_B 0x9b #define IS_LCPRV1(c) ((unsigned char)(c) == LCPRV1_A || (unsigned char)(c) == LCPRV1_B) #define IS_LCPRV1_A_RANGE(c) \ ((unsigned char)(c) >= 0xa0 && (unsigned char)(c) <= 0xdf) #define IS_LCPRV1_B_RANGE(c) \ ((unsigned char)(c) >= 0xe0 && (unsigned char)(c) <= 0xef) /* * Postgres-specific prefix bytes for "private" multibyte encodings * (According to the MULE docs, we should be using 0x9f for this) */ #define LCPRV2_A 0x9c #define LCPRV2_B 0x9d #define IS_LCPRV2(c) ((unsigned char)(c) == LCPRV2_A || (unsigned char)(c) == LCPRV2_B) #define IS_LCPRV2_A_RANGE(c) \ ((unsigned char)(c) >= 0xf0 && (unsigned char)(c) <= 0xf4) #define IS_LCPRV2_B_RANGE(c) \ ((unsigned char)(c) >= 0xf5 && (unsigned char)(c) <= 0xfe) /* * Charset IDs for private single byte encodings (0xa0-0xef) */ #define LC_SISHENG 0xa0 /* Chinese SiSheng characters for * PinYin/ZhuYin (not supported) */ #define LC_IPA 0xa1 /* IPA (International Phonetic * Association) (not supported) */ #define LC_VISCII_LOWER 0xa2 /* Vietnamese VISCII1.1 lower-case (not * supported) */ #define LC_VISCII_UPPER 0xa3 /* Vietnamese VISCII1.1 upper-case (not * supported) */ #define LC_ARABIC_DIGIT 0xa4 /* Arabic digit (not supported) */ #define LC_ARABIC_1_COLUMN 0xa5 /* Arabic 1-column (not supported) */ #define LC_ASCII_RIGHT_TO_LEFT 0xa6 /* ASCII (left half of ISO8859-1) with * right-to-left direction (not * supported) */ #define LC_LAO 0xa7 /* Lao characters (ISO10646 0E80..0EDF) * (not supported) */ #define LC_ARABIC_2_COLUMN 0xa8 /* Arabic 1-column (not supported) */ /* * Charset IDs for private multibyte encodings (0xf0-0xff) */ #define LC_INDIAN_1_COLUMN 0xf0 /* Indian charset for 1-column width * glyphs (not supported) */ #define LC_TIBETAN_1_COLUMN 0xf1 /* Tibetan 1-column width glyphs (not * supported) */ #define LC_UNICODE_SUBSET_2 0xf2 /* Unicode characters of the range * U+2500..U+33FF. (not supported) */ #define LC_UNICODE_SUBSET_3 0xf3 /* Unicode characters of the range * U+E000..U+FFFF. (not supported) */ #define LC_UNICODE_SUBSET 0xf4 /* Unicode characters of the range * U+0100..U+24FF. (not supported) */ #define LC_ETHIOPIC 0xf5 /* Ethiopic characters (not supported) */ #define LC_CNS11643_3 0xf6 /* CNS 11643-1992 Plane 3 */ #define LC_CNS11643_4 0xf7 /* CNS 11643-1992 Plane 4 */ #define LC_CNS11643_5 0xf8 /* CNS 11643-1992 Plane 5 */ #define LC_CNS11643_6 0xf9 /* CNS 11643-1992 Plane 6 */ #define LC_CNS11643_7 0xfa /* CNS 11643-1992 Plane 7 */ #define LC_INDIAN_2_COLUMN 0xfb /* Indian charset for 2-column width * glyphs (not supported) */ #define LC_TIBETAN 0xfc /* Tibetan (not supported) */ /* #define FREE 0xfd free (unused) */ /* #define FREE 0xfe free (unused) */ /* #define FREE 0xff free (unused) */ /*---------------------------------------------------- * end of MULE stuff *---------------------------------------------------- */ /* * PostgreSQL encoding identifiers * * WARNING: the order of this enum must be same as order of entries * in the pg_enc2name_tbl[] array (in mb/encnames.c), and * in the pg_wchar_table[] array (in mb/wchar.c)! * * If you add some encoding don't forget to check * PG_ENCODING_BE_LAST macro. * * PG_SQL_ASCII is default encoding and must be = 0. * * XXX We must avoid renumbering any backend encoding until libpq's major * version number is increased beyond 5; it turns out that the backend * encoding IDs are effectively part of libpq's ABI as far as 8.2 initdb and * psql are concerned. */ typedef enum pg_enc { PG_SQL_ASCII = 0, /* SQL/ASCII */ PG_EUC_JP, /* EUC for Japanese */ PG_EUC_CN, /* EUC for Chinese */ PG_EUC_KR, /* EUC for Korean */ PG_EUC_TW, /* EUC for Taiwan */ PG_EUC_JIS_2004, /* EUC-JIS-2004 */ PG_UTF8, /* Unicode UTF8 */ PG_MULE_INTERNAL, /* Mule internal code */ PG_LATIN1, /* ISO-8859-1 Latin 1 */ PG_LATIN2, /* ISO-8859-2 Latin 2 */ PG_LATIN3, /* ISO-8859-3 Latin 3 */ PG_LATIN4, /* ISO-8859-4 Latin 4 */ PG_LATIN5, /* ISO-8859-9 Latin 5 */ PG_LATIN6, /* ISO-8859-10 Latin6 */ PG_LATIN7, /* ISO-8859-13 Latin7 */ PG_LATIN8, /* ISO-8859-14 Latin8 */ PG_LATIN9, /* ISO-8859-15 Latin9 */ PG_LATIN10, /* ISO-8859-16 Latin10 */ PG_WIN1256, /* windows-1256 */ PG_WIN1258, /* Windows-1258 */ PG_WIN866, /* (MS-DOS CP866) */ PG_WIN874, /* windows-874 */ PG_KOI8R, /* KOI8-R */ PG_WIN1251, /* windows-1251 */ PG_WIN1252, /* windows-1252 */ 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_WIN1250, /* windows-1250 */ PG_WIN1253, /* windows-1253 */ PG_WIN1254, /* windows-1254 */ PG_WIN1255, /* windows-1255 */ PG_WIN1257, /* windows-1257 */ PG_KOI8U, /* KOI8-U */ /* PG_ENCODING_BE_LAST points to the above entry */ /* followings are for client encoding only */ PG_SJIS, /* Shift JIS (Windows-932) */ PG_BIG5, /* Big5 (Windows-950) */ PG_GBK, /* GBK (Windows-936) */ PG_UHC, /* UHC (Windows-949) */ PG_GB18030, /* GB18030 */ PG_JOHAB, /* EUC for Korean JOHAB */ PG_SHIFT_JIS_2004, /* Shift-JIS-2004 */ _PG_LAST_ENCODING_ /* mark only */ } pg_enc; #define PG_ENCODING_BE_LAST PG_KOI8U /* * Please use these tests before access to pg_encconv_tbl[] * or to other places... */ #define PG_VALID_BE_ENCODING(_enc) \ ((_enc) >= 0 && (_enc) <= PG_ENCODING_BE_LAST) #define PG_ENCODING_IS_CLIENT_ONLY(_enc) \ ((_enc) > PG_ENCODING_BE_LAST && (_enc) < _PG_LAST_ENCODING_) #define PG_VALID_ENCODING(_enc) \ ((_enc) >= 0 && (_enc) < _PG_LAST_ENCODING_) /* On FE are possible all encodings */ #define PG_VALID_FE_ENCODING(_enc) PG_VALID_ENCODING(_enc) /* * When converting strings between different encodings, we assume that space * for converted result is 4-to-1 growth in the worst case. The rate for * currently supported encoding pairs are within 3 (SJIS JIS X0201 half width * kanna -> UTF8 is the worst case). So "4" should be enough for the moment. * * Note that this is not the same as the maximum character width in any * particular encoding. */ #define MAX_CONVERSION_GROWTH 4 /* * Table for mapping an encoding number to official encoding name and * possibly other subsidiary data. Be careful to check encoding number * before accessing a table entry! * * if (PG_VALID_ENCODING(encoding)) * pg_enc2name_tbl[ encoding ]; */ typedef struct pg_enc2name { const char *name; pg_enc encoding; #ifdef WIN32 unsigned codepage; /* codepage for WIN32 */ #endif } pg_enc2name; extern const pg_enc2name pg_enc2name_tbl[]; /* * Encoding names for gettext */ typedef struct pg_enc2gettext { pg_enc encoding; const char *name; } pg_enc2gettext; extern const pg_enc2gettext pg_enc2gettext_tbl[]; /* * Encoding names for ICU */ extern bool is_encoding_supported_by_icu(int encoding); extern const char *get_encoding_name_for_icu(int encoding); /* * pg_wchar stuff */ typedef int (*mb2wchar_with_len_converter) (const unsigned char *from, pg_wchar *to, int len); typedef int (*wchar2mb_with_len_converter) (const pg_wchar *from, unsigned char *to, int len); typedef int (*mblen_converter) (const unsigned char *mbstr); typedef int (*mbdisplaylen_converter) (const unsigned char *mbstr); typedef bool (*mbcharacter_incrementer) (unsigned char *mbstr, int len); typedef int (*mbverifier) (const unsigned char *mbstr, int len); typedef struct { mb2wchar_with_len_converter mb2wchar_with_len; /* convert a multibyte * string to a wchar */ wchar2mb_with_len_converter wchar2mb_with_len; /* convert a wchar string * to a multibyte */ mblen_converter mblen; /* get byte length of a char */ mbdisplaylen_converter dsplen; /* get display width of a char */ mbverifier mbverify; /* verify multibyte sequence */ int maxmblen; /* max bytes for a char in this encoding */ } pg_wchar_tbl; extern const pg_wchar_tbl pg_wchar_table[]; /* * Data structures for conversions between UTF-8 and other encodings * (UtfToLocal() and LocalToUtf()). In these data structures, characters of * either encoding are represented by uint32 words; hence we can only support * characters up to 4 bytes long. For example, the byte sequence 0xC2 0x89 * would be represented by 0x0000C289, and 0xE8 0xA2 0xB4 by 0x00E8A2B4. * * There are three possible ways a character can be mapped: * * 1. Using a radix tree, from source to destination code. * 2. Using a sorted array of source -> destination code pairs. This * method is used for "combining" characters. There are so few of * them that building a radix tree would be wasteful. * 3. Using a conversion function. */ /* * Radix tree for character conversion. * * Logically, this is actually four different radix trees, for 1-byte, * 2-byte, 3-byte and 4-byte inputs. The 1-byte tree is a simple lookup * table from source to target code. The 2-byte tree consists of two levels: * one lookup table for the first byte, where the value in the lookup table * points to a lookup table for the second byte. And so on. * * Physically, all the trees are stored in one big array, in 'chars16' or * 'chars32', depending on the maximum value that needs to be represented. For * each level in each tree, we also store lower and upper bound of allowed * values - values outside those bounds are considered invalid, and are left * out of the tables. * * In the intermediate levels of the trees, the values stored are offsets * into the chars[16|32] array. * * In the beginning of the chars[16|32] array, there is always a number of * zeros, so that you safely follow an index from an intermediate table * without explicitly checking for a zero. Following a zero any number of * times will always bring you to the dummy, all-zeros table in the * beginning. This helps to shave some cycles when looking up values. */ typedef struct { /* * Array containing all the values. Only one of chars16 or chars32 is * used, depending on how wide the values we need to represent are. */ const uint16 *chars16; const uint32 *chars32; /* Radix tree for 1-byte inputs */ uint32 b1root; /* offset of table in the chars[16|32] array */ uint8 b1_lower; /* min allowed value for a single byte input */ uint8 b1_upper; /* max allowed value for a single byte input */ /* Radix tree for 2-byte inputs */ uint32 b2root; /* offset of 1st byte's table */ uint8 b2_1_lower; /* min/max allowed value for 1st input byte */ uint8 b2_1_upper; uint8 b2_2_lower; /* min/max allowed value for 2nd input byte */ uint8 b2_2_upper; /* Radix tree for 3-byte inputs */ uint32 b3root; /* offset of 1st byte's table */ uint8 b3_1_lower; /* min/max allowed value for 1st input byte */ uint8 b3_1_upper; uint8 b3_2_lower; /* min/max allowed value for 2nd input byte */ uint8 b3_2_upper; uint8 b3_3_lower; /* min/max allowed value for 3rd input byte */ uint8 b3_3_upper; /* Radix tree for 4-byte inputs */ uint32 b4root; /* offset of 1st byte's table */ uint8 b4_1_lower; /* min/max allowed value for 1st input byte */ uint8 b4_1_upper; uint8 b4_2_lower; /* min/max allowed value for 2nd input byte */ uint8 b4_2_upper; uint8 b4_3_lower; /* min/max allowed value for 3rd input byte */ uint8 b4_3_upper; uint8 b4_4_lower; /* min/max allowed value for 4th input byte */ uint8 b4_4_upper; } pg_mb_radix_tree; /* * UTF-8 to local code conversion map (for combined characters) */ typedef struct { uint32 utf1; /* UTF-8 code 1 */ uint32 utf2; /* UTF-8 code 2 */ uint32 code; /* local code */ } pg_utf_to_local_combined; /* * local code to UTF-8 conversion map (for combined characters) */ typedef struct { uint32 code; /* local code */ uint32 utf1; /* UTF-8 code 1 */ uint32 utf2; /* UTF-8 code 2 */ } pg_local_to_utf_combined; /* * callback function for algorithmic encoding conversions (in either direction) * * if function returns zero, it does not know how to convert the code */ typedef uint32 (*utf_local_conversion_func) (uint32 code); /* * Support macro for encoding conversion functions to validate their * arguments. (This could be made more compact if we included fmgr.h * here, but we don't want to do that because this header file is also * used by frontends.) */ #define CHECK_ENCODING_CONVERSION_ARGS(srcencoding,destencoding) \ check_encoding_conversion_args(PG_GETARG_INT32(0), \ PG_GETARG_INT32(1), \ PG_GETARG_INT32(4), \ (srcencoding), \ (destencoding)) /* * These functions are considered part of libpq's exported API and * are also declared in libpq-fe.h. */ extern int pg_char_to_encoding(const char *name); extern const char *pg_encoding_to_char(int encoding); extern int pg_valid_server_encoding_id(int encoding); /* * Remaining functions are not considered part of libpq's API, though many * of them do exist inside libpq. */ extern int pg_mb2wchar(const char *from, pg_wchar *to); extern int pg_mb2wchar_with_len(const char *from, pg_wchar *to, int len); extern int pg_encoding_mb2wchar_with_len(int encoding, const char *from, pg_wchar *to, int len); extern int pg_wchar2mb(const pg_wchar *from, char *to); extern int pg_wchar2mb_with_len(const pg_wchar *from, char *to, int len); extern int pg_encoding_wchar2mb_with_len(int encoding, const pg_wchar *from, char *to, int len); extern int pg_char_and_wchar_strcmp(const char *s1, const pg_wchar *s2); extern int pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n); extern int pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n); extern size_t pg_wchar_strlen(const pg_wchar *wstr); extern int pg_mblen(const char *mbstr); extern int pg_dsplen(const char *mbstr); extern int pg_encoding_mblen(int encoding, const char *mbstr); extern int pg_encoding_dsplen(int encoding, const char *mbstr); extern int pg_encoding_verifymb(int encoding, const char *mbstr, int len); extern int pg_mule_mblen(const unsigned char *mbstr); extern int pg_mic_mblen(const unsigned char *mbstr); extern int pg_mbstrlen(const char *mbstr); extern int pg_mbstrlen_with_len(const char *mbstr, int len); extern int pg_mbcliplen(const char *mbstr, int len, int limit); extern int pg_encoding_mbcliplen(int encoding, const char *mbstr, int len, int limit); extern int pg_mbcharcliplen(const char *mbstr, int len, int imit); extern int pg_encoding_max_length(int encoding); extern int pg_database_encoding_max_length(void); extern mbcharacter_incrementer pg_database_encoding_character_incrementer(void); extern int PrepareClientEncoding(int encoding); extern int SetClientEncoding(int encoding); extern void InitializeClientEncoding(void); extern int pg_get_client_encoding(void); extern const char *pg_get_client_encoding_name(void); extern void SetDatabaseEncoding(int encoding); extern int GetDatabaseEncoding(void); extern const char *GetDatabaseEncodingName(void); extern void SetMessageEncoding(int encoding); extern int GetMessageEncoding(void); #ifdef ENABLE_NLS extern int pg_bind_textdomain_codeset(const char *domainname); #endif extern int pg_valid_client_encoding(const char *name); extern int pg_valid_server_encoding(const char *name); extern unsigned char *unicode_to_utf8(pg_wchar c, unsigned char *utf8string); extern pg_wchar utf8_to_unicode(const unsigned char *c); extern int pg_utf_mblen(const unsigned char *); extern unsigned char *pg_do_encoding_conversion(unsigned char *src, int len, int src_encoding, int dest_encoding); extern char *pg_client_to_server(const char *s, int len); extern char *pg_server_to_client(const char *s, int len); extern char *pg_any_to_server(const char *s, int len, int encoding); extern char *pg_server_to_any(const char *s, int len, int encoding); extern unsigned short BIG5toCNS(unsigned short big5, unsigned char *lc); extern unsigned short CNStoBIG5(unsigned short cns, unsigned char lc); extern void UtfToLocal(const unsigned char *utf, int len, unsigned char *iso, const pg_mb_radix_tree *map, const pg_utf_to_local_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding); extern void LocalToUtf(const unsigned char *iso, int len, unsigned char *utf, const pg_mb_radix_tree *map, const pg_local_to_utf_combined *cmap, int cmapsize, utf_local_conversion_func conv_func, int encoding); extern bool pg_verifymbstr(const char *mbstr, int len, bool noError); extern bool pg_verify_mbstr(int encoding, const char *mbstr, int len, bool noError); extern int pg_verify_mbstr_len(int encoding, const char *mbstr, int len, bool noError); extern void check_encoding_conversion_args(int src_encoding, int dest_encoding, int len, int expected_src_encoding, int expected_dest_encoding); extern void report_invalid_encoding(int encoding, const char *mbstr, int len) pg_attribute_noreturn(); extern void report_untranslatable_char(int src_encoding, int dest_encoding, const char *mbstr, int len) pg_attribute_noreturn(); extern void local2local(const unsigned char *l, unsigned char *p, int len, int src_encoding, int dest_encoding, const unsigned char *tab); extern void pg_ascii2mic(const unsigned char *l, unsigned char *p, int len); extern void pg_mic2ascii(const unsigned char *mic, unsigned char *p, int len); extern void latin2mic(const unsigned char *l, unsigned char *p, int len, int lc, int encoding); extern void mic2latin(const unsigned char *mic, unsigned char *p, int len, int lc, int encoding); extern void latin2mic_with_table(const unsigned char *l, unsigned char *p, int len, int lc, int encoding, const unsigned char *tab); extern void mic2latin_with_table(const unsigned char *mic, unsigned char *p, int len, int lc, int encoding, const unsigned char *tab); extern bool pg_utf8_islegal(const unsigned char *source, int length); #ifdef WIN32 extern WCHAR *pgwin32_message_to_UTF16(const char *str, int len, int *utf16len); #endif #endif /* PG_WCHAR_H */