mirror of https://github.com/postgres/postgres
Included are patches intended for allowing PostgreSQL to handle multi-byte charachter sets such as EUC(Extende Unix Code), Unicode and Mule internal code. With the MB patch you can use multi-byte character sets in regexp and LIKE. The encoding system chosen is determined at the compile time. To enable the MB extension, you need to define a variable "MB" in Makefile.global or in Makefile.custom. For further information please take a look at README.mb under doc directory. (Note that unlike "jp patch" I do not use modified GNU regexp any more. I changed Henry Spencer's regexp coming with PostgreSQL.)pull/50/head
Marc G. Fournier
28 years ago
parent
31a925c4d0
commit
661ecf3c48
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postgresql 6.3 multi-byte(MB) patch PL2 README Mar 10 1998 |
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|
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Tatsuo Ishii |
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t-ishii@sra.co.jp |
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http://www.sra.co.jp/people/t-ishii/PostgreSQL/ |
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|
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Introduction |
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|
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MB patch is intended for allowing PostgreSQL to handle multi-byte |
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charachter sets such as EUC(Extende Unix Code), Unicode and Mule |
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internal code. With the MB patch you can use multi-byte character sets |
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in regexp and LIKE. The encoding system chosen is determined at the |
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compile time. |
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|
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The patch also fixes some problems concerning with 8-bit single byte |
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character sets including ISO8859. (I would not say all of problems |
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have been fixed. I just confirmed that the regression test ran fine |
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and a few French characters could be used with the patch. Please let |
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me know if you find any problem while using 8-bit characters) |
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|
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How to use |
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|
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After applying the MB patch, create src/Makefile.custom with a line |
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including: |
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MB=encoding_system |
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|
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where encoding_system is one of: |
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EUC_JP Japanese EUC |
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EUC_CN Chinese EUC |
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EUC_KR Korean EUC |
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EUC_TW Taiwan EUC |
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UNICODE Unicode(UTF-8) |
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MULE_INTERNAL Mule internal |
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|
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Example: |
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% cat Makefile.custom |
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MB=EUC_JP |
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If MB is not defined, nothing is changed except better supporting for |
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8-bit single byte character sets. |
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|
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References |
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These are good sources to start learning various kind of encoding |
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systems. |
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ftp://ftp.ora.com/pub/examples/nutshell/ujip/doc/cjk.inf |
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Detailed explanations of EUC_JP, EUC_CN, EUC_KR, EUC_TW |
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appear in section 3.2. |
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|
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Unicode: http://www.unicode.org/ |
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The homepage of UNICODE. |
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|
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RFC 2044 |
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UTF-8 is defined here. |
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|
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History |
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Mar 10, 1998 PL2 released |
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* add regression test for EUC_JP, EUC_CN and MULE_INTERNAL |
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* add an English document (this file) |
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* fix problems concerning 8-bit single byte characters |
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|
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Mar 1, 1998 PL1 released |
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@ -0,0 +1,33 @@ |
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/*
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* testing of utf2wchar() |
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* $Id: utftest.c,v 1.1 1998/03/15 07:38:37 scrappy Exp $ |
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*/ |
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#include <regex/regex.h> |
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#include <regex/utils.h> |
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#include <regex/regex2.h> |
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|
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#include <regex/pg_wchar.h> |
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|
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main() |
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{ |
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/* Example 1 from RFC2044 */ |
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char utf1[] = {0x41,0xe2,0x89,0xa2,0xce,0x91,0x2e,0}; |
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/* Example 2 from RFC2044 */ |
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char utf2[] = {0x48,0x69,0x20,0x4d,0x6f,0x6d,0x20,0xe2,0x98,0xba,0x21,0}; |
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/* Example 3 from RFC2044 */ |
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char utf3[] = {0xe6,0x97,0xa5,0xe6,0x9c,0xac,0xe8,0xaa,0x9e,0}; |
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char *utf[] = {utf1,utf2,utf3}; |
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pg_wchar ucs[128]; |
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pg_wchar *p; |
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int i; |
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for (i=0;i<sizeof(utf)/sizeof(char *);i++) { |
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pg_utf2wchar(utf[i],ucs); |
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p = ucs; |
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while(*p) { |
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printf("%04x ",*p); |
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p++; |
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} |
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printf("\n"); |
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} |
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} |
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@ -0,0 +1,348 @@ |
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/*
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* misc conversion functions between pg_wchar and other encodings. |
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* Tatsuo Ishii |
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* $Id: utils.c,v 1.1 1998/03/15 07:38:39 scrappy Exp $ |
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*/ |
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#include <regex/pg_wchar.h> |
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/*
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* convert EUC to pg_wchar (EUC process code) |
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* caller should allocate enough space for "to" |
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*/ |
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static void pg_euc2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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while (*from) { |
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if (*from == SS2) { |
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from++; |
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*to = *from++; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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} else { |
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*to = *from++; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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static void pg_eucjp2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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pg_euc2wchar(from,to); |
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} |
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|
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static void pg_euckr2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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pg_euc2wchar(from,to); |
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} |
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|
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static void pg_eucch2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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while (*from) { |
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if (*from == SS2) { |
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from++; |
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*to = 0x3f00 & (*from++ << 8); |
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*to = *from++; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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} else { |
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*to = *from++; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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static void pg_euccn2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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while (*from) { |
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if (*from == SS2) { |
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from++; |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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} else { |
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*to = *from++; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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/*
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* convert UTF-8 to pg_wchar (UCS-2) |
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* caller should allocate enough space for "to" |
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*/ |
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static void pg_utf2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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unsigned char c1,c2,c3; |
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while (*from) { |
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if ((*from & 0x80) == 0) { |
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*to = *from++; |
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} else if ((*from & 0xe0) == 0xc0) { |
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c1 = *from++ & 0x1f; |
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c2 = *from++ & 0x3f; |
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*to = c1 << 6; |
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*to |= c2; |
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} else if ((*from & 0xe0) == 0xe0) { |
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c1 = *from++ & 0x0f; |
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c2 = *from++ & 0x3f; |
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c3 = *from++ & 0x3f; |
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*to = c1 << 12; |
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*to |= c2 << 6; |
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*to |= c3; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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/*
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* convert mule internal code to pg_wchar. |
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* in this case pg_wchar consists of following 4 bytes: |
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* |
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* 0x00(unused) |
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* 0x00(ASCII)|leading character (one of LC1, LC12, LC2 or LC22) |
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* 0x00(ASCII,1 byte code)|other than 0x00(2 byte code) |
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* the lowest byte of the code |
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* |
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* note that Type N (variable length byte encoding) cannot be represented by |
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* this schema. sorry. |
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* caller should allocate enough space for "to" |
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*/ |
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static void pg_mule2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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while (*from) { |
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if (IS_LC1(*from)) { |
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*to = *from++ << 16; |
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*to |= *from++; |
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} else if (IS_LCPRV1(*from)) { |
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from++; |
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*to = *from++ << 16; |
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*to |= *from++; |
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} else if (IS_LC2(*from)) { |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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} else if (IS_LCPRV2(*from)) { |
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from++; |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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} else { /* assume ASCII */ |
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*to = *from++; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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/*
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* convert EUC to pg_wchar (EUC process code) |
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* caller should allocate enough space for "to" |
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* len: length of from. |
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* "from" not necessarily null terminated. |
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*/ |
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static void pg_euc2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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while (*from && len > 0) { |
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if (*from == SS2) { |
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from++; |
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len--; |
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*to = 0xff & *from++; |
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len--; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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len -= 3; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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len -= 2; |
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} else { |
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*to = *from++; |
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len--; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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static void pg_eucjp2wchar_with_len |
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(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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pg_euc2wchar_with_len(from,to,len); |
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} |
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static void pg_euckr2wchar_with_len |
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(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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pg_euc2wchar_with_len(from,to,len); |
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} |
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|
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static void pg_eucch2wchar_with_len |
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(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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while (*from && len > 0) { |
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if (*from == SS2) { |
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from++; |
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len--; |
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*to = 0x3f00 & (*from++ << 8); |
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*to = *from++; |
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len -= 2; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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len -= 3; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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len -= 2; |
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} else { |
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*to = *from++; |
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len--; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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static void pg_euccn2wchar_with_len |
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(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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while (*from && len > 0) { |
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if (*from == SS2) { |
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from++; |
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len--; |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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len -= 3; |
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} else if (*from == SS3) { |
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from++; |
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*to = *from++ << 8; |
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*to |= 0x3f & *from++; |
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len -= 3; |
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} else if (*from & 0x80) { |
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*to = *from++ << 8; |
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*to |= *from++; |
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len -= 2; |
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} else { |
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*to = *from++; |
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len--; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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/*
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* convert UTF-8 to pg_wchar (UCS-2) |
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* caller should allocate enough space for "to" |
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* len: length of from. |
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* "from" not necessarily null terminated. |
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*/ |
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static void pg_utf2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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unsigned char c1,c2,c3; |
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while (*from && len > 0) { |
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if ((*from & 0x80) == 0) { |
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*to = *from++; |
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len--; |
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} else if ((*from & 0xe0) == 0xc0) { |
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c1 = *from++ & 0x1f; |
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c2 = *from++ & 0x3f; |
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len -= 2; |
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*to = c1 << 6; |
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*to |= c2; |
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} else if ((*from & 0xe0) == 0xe0) { |
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c1 = *from++ & 0x0f; |
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c2 = *from++ & 0x3f; |
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c3 = *from++ & 0x3f; |
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len -= 3; |
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*to = c1 << 12; |
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*to |= c2 << 6; |
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*to |= c3; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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/*
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* convert mule internal code to pg_wchar |
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* caller should allocate enough space for "to" |
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* len: length of from. |
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* "from" not necessarily null terminated. |
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*/ |
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static void pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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while (*from && len > 0) { |
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if (IS_LC1(*from)) { |
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*to = *from++ << 16; |
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*to |= *from++; |
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len -= 2; |
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} else if (IS_LCPRV1(*from)) { |
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from++; |
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*to = *from++ << 16; |
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*to |= *from++; |
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len -= 3; |
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} else if (IS_LC2(*from)) { |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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len -= 3; |
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} else if (IS_LCPRV2(*from)) { |
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from++; |
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*to = *from++ << 16; |
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*to |= *from++ << 8; |
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*to |= *from++; |
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len -= 4; |
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} else { /* assume ASCII */ |
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*to = (unsigned char)*from++; |
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len--; |
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} |
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to++; |
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} |
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*to = 0; |
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} |
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|
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typedef struct { |
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void (*mb2wchar)(); |
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void (*mb2wchar_with_len)(); |
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} pg_wchar_tbl; |
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|
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static pg_wchar_tbl pg_wchar_table[] = { |
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{pg_eucjp2wchar, pg_eucjp2wchar_with_len}, |
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{pg_eucch2wchar, pg_eucch2wchar_with_len}, |
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{pg_euckr2wchar, pg_euckr2wchar_with_len}, |
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{pg_euccn2wchar, pg_euccn2wchar_with_len}, |
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{pg_utf2wchar, pg_utf2wchar_with_len}, |
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{pg_mule2wchar, pg_mule2wchar_with_len}}; |
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|
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void pg_mb2wchar(const unsigned char *from, pg_wchar *to) |
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{ |
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(*pg_wchar_table[MB].mb2wchar)(from,to); |
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} |
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|
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void pg_mb2wchar_with_len(const unsigned char *from, pg_wchar *to, int len) |
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{ |
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(*pg_wchar_table[MB].mb2wchar_with_len)(from,to,len); |
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} |
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@ -0,0 +1,48 @@ |
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/*-
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* Copyright (c) 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Chris Torek. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
||||
* notice, this list of conditions and the following disclaimer in the |
||||
* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
||||
* must display the following acknowledgement: |
||||
* This product includes software developed by the University of |
||||
* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
||||
* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include <regex/pg_wchar.h> |
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|
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int |
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pg_char_and_wchar_strcmp(s1, s2) |
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register const char *s1; |
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register const pg_wchar *s2; |
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{ |
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while ((pg_wchar)*s1 == *s2++) |
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if (*s1++ == 0) |
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return (0); |
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return (*(const unsigned char *)s1 - *(const pg_wchar *)(s2 - 1)); |
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} |
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@ -0,0 +1,83 @@ |
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/*
|
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* Copyright (c) 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from FreeBSD 2.2.1-RELEASE software. |
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* |
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* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions |
||||
* are met: |
||||
* 1. Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* 2. Redistributions in binary form must reproduce the above copyright |
||||
* notice, this list of conditions and the following disclaimer in the |
||||
* documentation and/or other materials provided with the distribution. |
||||
* 3. All advertising materials mentioning features or use of this software |
||||
* must display the following acknowledgement: |
||||
* This product includes software developed by the University of |
||||
* California, Berkeley and its contributors. |
||||
* 4. Neither the name of the University nor the names of its contributors |
||||
* may be used to endorse or promote products derived from this software |
||||
* without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
||||
* SUCH DAMAGE. |
||||
*/ |
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|
||||
#include <regex/pg_wchar.h> |
||||
|
||||
int |
||||
pg_wchar_strncmp(s1, s2, n) |
||||
register const pg_wchar *s1, *s2; |
||||
register size_t n; |
||||
{ |
||||
|
||||
if (n == 0) |
||||
return (0); |
||||
do { |
||||
if (*s1 != *s2++) |
||||
return (*(const pg_wchar *)s1 - |
||||
*(const pg_wchar *)(s2 - 1)); |
||||
if (*s1++ == 0) |
||||
break; |
||||
} while (--n != 0); |
||||
return (0); |
||||
} |
||||
|
||||
int |
||||
pg_char_and_wchar_strncmp(s1, s2, n) |
||||
register const char *s1; |
||||
register const pg_wchar *s2; |
||||
register size_t n; |
||||
{ |
||||
|
||||
if (n == 0) |
||||
return (0); |
||||
do { |
||||
if ((pg_wchar )*s1 != *s2++) |
||||
return (*(const pg_wchar *)s1 - |
||||
*(const pg_wchar *)(s2 - 1)); |
||||
if (*s1++ == 0) |
||||
break; |
||||
} while (--n != 0); |
||||
return (0); |
||||
} |
||||
|
||||
size_t |
||||
pg_wchar_strlen(str) |
||||
const pg_wchar *str; |
||||
{ |
||||
register const pg_wchar *s; |
||||
|
||||
for (s = str; *s; ++s); |
||||
return(s - str); |
||||
} |
||||
@ -0,0 +1,44 @@ |
||||
/* $Id: pg_wchar.h,v 1.1 1998/03/15 07:38:47 scrappy Exp $ */ |
||||
|
||||
#ifndef PG_WCHAR_H |
||||
#define PG_WCHAR_H |
||||
|
||||
#include <sys/types.h> |
||||
|
||||
#define EUC_JP 0 /* EUC for Japanese */ |
||||
#define EUC_CN 1 /* EUC for Chinese */ |
||||
#define EUC_KR 2 /* EUC for Korean */ |
||||
#define EUC_TW 3 /* EUC for Taiwan */ |
||||
#define UNICODE 4 /* Unicode UTF-8 */ |
||||
#define MULE_INTERNAL 5 /* Mule internal code */ |
||||
|
||||
#ifdef MB |
||||
typedef unsigned int pg_wchar; |
||||
#else |
||||
#define pg_wchar char |
||||
#endif |
||||
|
||||
/*
|
||||
* various definitions for EUC |
||||
*/ |
||||
#define SS2 0x8e /* single shift 2 */ |
||||
#define SS3 0x8f /* single shift 3 */ |
||||
|
||||
/*
|
||||
* various definitions for mule internal code |
||||
*/ |
||||
#define IS_LC1(c) ((unsigned char)(c) >= 0x81 && (unsigned char)(c) <= 0x8f) |
||||
#define IS_LCPRV1(c) ((unsigned char)(c) == 0x9a || (unsigned char)(c) == 0x9b) |
||||
#define IS_LC2(c) ((unsigned char)(c) >= 0x90 && (unsigned char)(c) <= 0x99) |
||||
#define IS_LCPRV2(c) ((unsigned char)(c) == 0x9c || (unsigned char)(c) == 0x9d) |
||||
|
||||
#ifdef MB |
||||
extern void pg_mb2wchar(const unsigned char *, pg_wchar *); |
||||
extern void pg_mb2wchar_with_len(const unsigned char *, pg_wchar *, int); |
||||
extern int pg_char_and_wchar_strcmp(const char *, const pg_wchar *); |
||||
extern int pg_wchar_strncmp(const pg_wchar *, const pg_wchar *, size_t); |
||||
extern int pg_char_and_wchar_strncmp(const char *, const pg_wchar *, size_t); |
||||
extern size_t pg_wchar_strlen(const pg_wchar *); |
||||
#endif |
||||
|
||||
#endif |
||||
Loading…
Reference in new issue