diff options
Diffstat (limited to 'src/include/mb')
| -rw-r--r-- | src/include/mb/pg_wchar.h | 702 | ||||
| -rw-r--r-- | src/include/mb/stringinfo_mb.h | 24 |
2 files changed, 726 insertions, 0 deletions
diff --git a/src/include/mb/pg_wchar.h b/src/include/mb/pg_wchar.h new file mode 100644 index 0000000..d93ccac --- /dev/null +++ b/src/include/mb/pg_wchar.h @@ -0,0 +1,702 @@ +/*------------------------------------------------------------------------- + * + * pg_wchar.h + * multibyte-character support + * + * Portions Copyright (c) 1996-2021, 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 frontends, 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 src/common/encnames.c), and + * in the pg_wchar_table[] array (in src/common/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_enc2name_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 + * kana -> 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 + +/* + * Maximum byte length of a string that's required in any encoding to convert + * at least one character to any other encoding. In other words, if you feed + * MAX_CONVERSION_INPUT_LENGTH bytes to any encoding conversion function, it + * is guaranteed to be able to convert something without needing more input + * (assuming the input is valid). + * + * Currently, the maximum case is the conversion UTF8 -> SJIS JIS X0201 half + * width kana, where a pair of UTF-8 characters is converted into a single + * SHIFT_JIS_2004 character (the reverse of the worst case for + * MAX_CONVERSION_GROWTH). It needs 6 bytes of input. In theory, a + * user-defined conversion function might have more complicated cases, although + * for the reverse mapping you would probably also need to bump up + * MAX_CONVERSION_GROWTH. But there is no need to be stingy here, so make it + * generous. + */ +#define MAX_CONVERSION_INPUT_LENGTH 16 + +/* + * Maximum byte length of the string equivalent to any one Unicode code point, + * in any backend encoding. The current value assumes that a 4-byte UTF-8 + * character might expand by MAX_CONVERSION_GROWTH, which is a huge + * overestimate. But in current usage we don't allocate large multiples of + * this, so there's little point in being stingy. + */ +#define MAX_UNICODE_EQUIVALENT_STRING 16 + +/* + * 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[]; + +/* + * 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 (*mbchar_verifier) (const unsigned char *mbstr, int len); + +typedef int (*mbstr_verifier) (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 */ + mbchar_verifier mbverifychar; /* verify multibyte character */ + mbstr_verifier mbverifystr; /* verify multibyte string */ + 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)) + + +/* + * Some handy functions for Unicode-specific tests. + */ +static inline bool +is_valid_unicode_codepoint(pg_wchar c) +{ + return (c > 0 && c <= 0x10FFFF); +} + +static inline bool +is_utf16_surrogate_first(pg_wchar c) +{ + return (c >= 0xD800 && c <= 0xDBFF); +} + +static inline bool +is_utf16_surrogate_second(pg_wchar c) +{ + return (c >= 0xDC00 && c <= 0xDFFF); +} + +static inline pg_wchar +surrogate_pair_to_codepoint(pg_wchar first, pg_wchar second) +{ + return ((first & 0x3FF) << 10) + 0x10000 + (second & 0x3FF); +} + + +/* + * 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); + +/* + * These functions are available to frontend code that links with libpgcommon + * (in addition to the ones just above). The constant tables declared + * earlier in this file are also available from libpgcommon. + */ +extern int pg_encoding_mblen(int encoding, const char *mbstr); +extern int pg_encoding_mblen_bounded(int encoding, const char *mbstr); +extern int pg_encoding_dsplen(int encoding, const char *mbstr); +extern int pg_encoding_verifymbchar(int encoding, const char *mbstr, int len); +extern int pg_encoding_verifymbstr(int encoding, const char *mbstr, int len); +extern int pg_encoding_max_length(int encoding); +extern int pg_valid_client_encoding(const char *name); +extern int pg_valid_server_encoding(const char *name); +extern bool is_encoding_supported_by_icu(int encoding); +extern const char *get_encoding_name_for_icu(int encoding); + +extern unsigned char *unicode_to_utf8(pg_wchar c, unsigned char *utf8string); +extern pg_wchar utf8_to_unicode(const unsigned char *c); +extern bool pg_utf8_islegal(const unsigned char *source, int length); +extern int pg_utf_mblen(const unsigned char *s); +extern int pg_mule_mblen(const unsigned char *s); + +/* + * The remaining functions are backend-only. + */ +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_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 limit); +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 unsigned char *pg_do_encoding_conversion(unsigned char *src, int len, + int src_encoding, + int dest_encoding); +extern int pg_do_encoding_conversion_buf(Oid proc, + int src_encoding, + int dest_encoding, + unsigned char *src, int srclen, + unsigned char *dst, int dstlen, + bool noError); + +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 void pg_unicode_to_server(pg_wchar c, unsigned char *s); + +extern unsigned short BIG5toCNS(unsigned short big5, unsigned char *lc); +extern unsigned short CNStoBIG5(unsigned short cns, unsigned char lc); + +extern int 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, bool noError); +extern int 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, bool noError); + +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 int local2local(const unsigned char *l, unsigned char *p, int len, + int src_encoding, int dest_encoding, + const unsigned char *tab, bool noError); +extern int latin2mic(const unsigned char *l, unsigned char *p, int len, + int lc, int encoding, bool noError); +extern int mic2latin(const unsigned char *mic, unsigned char *p, int len, + int lc, int encoding, bool noError); +extern int latin2mic_with_table(const unsigned char *l, unsigned char *p, + int len, int lc, int encoding, + const unsigned char *tab, bool noError); +extern int mic2latin_with_table(const unsigned char *mic, unsigned char *p, + int len, int lc, int encoding, + const unsigned char *tab, bool noError); + +#ifdef WIN32 +extern WCHAR *pgwin32_message_to_UTF16(const char *str, int len, int *utf16len); +#endif + +#endif /* PG_WCHAR_H */ diff --git a/src/include/mb/stringinfo_mb.h b/src/include/mb/stringinfo_mb.h new file mode 100644 index 0000000..ffc3712 --- /dev/null +++ b/src/include/mb/stringinfo_mb.h @@ -0,0 +1,24 @@ +/*------------------------------------------------------------------------- + * + * stringinfo_mb.h + * multibyte support for StringInfo + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/mb/stringinfo_mb.h + *------------------------------------------------------------------------- + */ +#ifndef STRINGINFO_MB_H +#define STRINGINFO_MB_H + + +#include "lib/stringinfo.h" + +/* + * Multibyte-aware StringInfo support function. + */ +extern void appendStringInfoStringQuoted(StringInfo str, + const char *s, int maxlen); + +#endif /* STRINGINFO_MB_H */ |