mirror of
https://github.com/postgres/postgres.git
synced 2025-11-04 00:02:52 -05:00
Move wchar2char() and char2wchar() from tsearch into /mb to be easier to
use for other modules; also move pnstrdup(). Clean up code slightly.
This commit is contained in:
Bruce Momjian
parent
3eb9da524d
commit
9de09c087d
@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/tsearch/ts_locale.c,v 1.8 2008/06/17 16:09:06 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/tsearch/ts_locale.c,v 1.9 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -16,125 +16,8 @@
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#include "tsearch/ts_locale.h"
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#include "tsearch/ts_public.h"
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#ifdef USE_WIDE_UPPER_LOWER
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/*
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* wchar2char --- convert wide characters to multibyte format
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*
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* This has the same API as the standard wcstombs() function; in particular,
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* tolen is the maximum number of bytes to store at *to, and *from must be
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* zero-terminated. The output will be zero-terminated iff there is room.
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*/
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size_t
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wchar2char(char *to, const wchar_t *from, size_t tolen)
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{
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if (tolen == 0)
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return 0;
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#ifdef WIN32
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if (GetDatabaseEncoding() == PG_UTF8)
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{
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int r;
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r = WideCharToMultiByte(CP_UTF8, 0, from, -1, to, tolen,
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NULL, NULL);
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if (r <= 0)
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return (size_t) -1;
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Assert(r <= tolen);
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/* Microsoft counts the zero terminator in the result */
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return r - 1;
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}
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#endif /* WIN32 */
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return wcstombs(to, from, tolen);
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}
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/*
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* char2wchar --- convert multibyte characters to wide characters
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*
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* This has almost the API of mbstowcs(), except that *from need not be
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* null-terminated; instead, the number of input bytes is specified as
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* fromlen. Also, we ereport() rather than returning -1 for invalid
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* input encoding. tolen is the maximum number of wchar_t's to store at *to.
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* The output will be zero-terminated iff there is room.
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*/
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size_t
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char2wchar(wchar_t *to, size_t tolen, const char *from, size_t fromlen)
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{
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if (tolen == 0)
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return 0;
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#ifdef WIN32
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if (GetDatabaseEncoding() == PG_UTF8)
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{
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int r;
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/* stupid Microsloth API does not work for zero-length input */
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if (fromlen == 0)
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r = 0;
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else
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{
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r = MultiByteToWideChar(CP_UTF8, 0, from, fromlen, to, tolen - 1);
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if (r <= 0)
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{
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/* see notes in oracle_compat.c about error reporting */
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pg_verifymbstr(from, fromlen, false);
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ereport(ERROR,
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(errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
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errmsg("invalid multibyte character for locale"),
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errhint("The server's LC_CTYPE locale is probably incompatible with the database encoding.")));
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}
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}
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Assert(r < tolen);
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to[r] = 0;
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return r;
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}
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#endif /* WIN32 */
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if (lc_ctype_is_c())
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{
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/*
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* pg_mb2wchar_with_len always adds trailing '\0', so 'to' should be
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* allocated with sufficient space
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*/
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return pg_mb2wchar_with_len(from, (pg_wchar *) to, fromlen);
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}
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else
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{
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/*
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* mbstowcs requires ending '\0'
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*/
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char *str = pnstrdup(from, fromlen);
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size_t result;
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result = mbstowcs(to, str, tolen);
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pfree(str);
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if (result == (size_t) -1)
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{
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pg_verifymbstr(from, fromlen, false);
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ereport(ERROR,
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(errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
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errmsg("invalid multibyte character for locale"),
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errhint("The server's LC_CTYPE locale is probably incompatible with the database encoding.")));
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}
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if (result < tolen)
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to[result] = 0;
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return result;
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}
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}
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int
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t_isdigit(const char *ptr)
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{
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/tsearch/ts_utils.c,v 1.9 2008/01/01 19:45:52 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/tsearch/ts_utils.c,v 1.10 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -153,13 +153,3 @@ searchstoplist(StopList *s, char *key)
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bsearch(&key, s->stop, s->len,
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sizeof(char *), comparestr)) ? true : false;
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}
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char *
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pnstrdup(const char *in, int len)
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{
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char *out = palloc(len + 1);
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memcpy(out, in, len);
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out[len] = '\0';
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return out;
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}
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@ -4,7 +4,7 @@
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* (currently mule internal code (mic) is used)
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* Tatsuo Ishii
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*
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* $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.71 2008/05/27 12:24:42 mha Exp $
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* $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.72 2008/06/18 18:42:54 momjian Exp $
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*/
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#include "postgres.h"
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@ -555,6 +555,134 @@ perform_default_encoding_conversion(const char *src, int len, bool is_client_to_
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return result;
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}
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#ifdef USE_WIDE_UPPER_LOWER
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/*
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* wchar2char --- convert wide characters to multibyte format
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*
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* This has the same API as the standard wcstombs() function; in particular,
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* tolen is the maximum number of bytes to store at *to, and *from must be
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* zero-terminated. The output will be zero-terminated iff there is room.
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*/
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size_t
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wchar2char(char *to, const wchar_t *from, size_t tolen)
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{
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size_t result;
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if (tolen == 0)
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return 0;
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#ifdef WIN32
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/*
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* On Windows, the "Unicode" locales assume UTF16 not UTF8 encoding,
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* and for some reason mbstowcs and wcstombs won't do this for us,
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* so we use MultiByteToWideChar().
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*/
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if (GetDatabaseEncoding() == PG_UTF8)
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{
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result = WideCharToMultiByte(CP_UTF8, 0, from, -1, to, tolen,
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NULL, NULL);
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/* A zero return is failure */
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if (result <= 0)
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result = -1;
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else
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{
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Assert(result <= tolen);
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/* Microsoft counts the zero terminator in the result */
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result--;
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}
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}
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else
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#endif /* WIN32 */
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result = wcstombs(to, from, tolen);
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return result;
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}
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/*
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* char2wchar --- convert multibyte characters to wide characters
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*
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* This has almost the API of mbstowcs(), except that *from need not be
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* null-terminated; instead, the number of input bytes is specified as
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* fromlen. Also, we ereport() rather than returning -1 for invalid
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* input encoding. tolen is the maximum number of wchar_t's to store at *to.
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* The output will be zero-terminated iff there is room.
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*/
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size_t
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char2wchar(wchar_t *to, size_t tolen, const char *from, size_t fromlen)
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{
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size_t result;
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if (tolen == 0)
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return 0;
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#ifdef WIN32
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/* See WIN32 "Unicode" comment above */
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if (GetDatabaseEncoding() == PG_UTF8)
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{
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/* Win32 API does not work for zero-length input */
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if (fromlen == 0)
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result = 0;
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else
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{
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result = MultiByteToWideChar(CP_UTF8, 0, from, fromlen, to, tolen - 1);
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/* A zero return is failure */
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if (result == 0)
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result = -1;
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}
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if (result != -1)
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{
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Assert(result < tolen);
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/* Append trailing null wchar (MultiByteToWideChar() does not) */
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to[result] = 0;
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}
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}
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else
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#endif /* WIN32 */
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{
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if (lc_ctype_is_c())
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{
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/*
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* pg_mb2wchar_with_len always adds trailing '\0', so 'to' should be
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* allocated with sufficient space
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*/
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result = pg_mb2wchar_with_len(from, (pg_wchar *) to, fromlen);
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}
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else
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{
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/* mbstowcs requires ending '\0' */
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char *str = pnstrdup(from, fromlen);
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result = mbstowcs(to, str, tolen);
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pfree(str);
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}
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}
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if (result == -1)
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{
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/*
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* Invalid multibyte character encountered. We try to give a useful
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* error message by letting pg_verifymbstr check the string. But it's
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* possible that the string is OK to us, and not OK to mbstowcs ---
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* this suggests that the LC_CTYPE locale is different from the
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* database encoding. Give a generic error message if verifymbstr
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* can't find anything wrong.
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*/
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pg_verifymbstr(from, fromlen, false); /* might not return */
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/* but if it does ... */
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ereport(ERROR,
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(errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
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errmsg("invalid multibyte character for locale"),
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errhint("The server's LC_CTYPE locale is probably incompatible with the database encoding.")));
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}
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return result;
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}
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#endif
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/* convert a multibyte string to a wchar */
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int
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pg_mb2wchar(const char *from, pg_wchar *to)
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@ -14,7 +14,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.63 2008/01/01 19:45:55 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.64 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -624,6 +624,18 @@ repalloc(void *pointer, Size size)
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pointer, size);
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}
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/* Like pstrdup(), but append null byte */
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char *
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pnstrdup(const char *in, int len)
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{
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char *out = palloc(len + 1);
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memcpy(out, in, len);
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out[len] = '\0';
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return out;
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}
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/*
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* MemoryContextSwitchTo
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* Returns the current context; installs the given context.
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@ -6,7 +6,7 @@
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* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/mb/pg_wchar.h,v 1.78 2008/01/01 19:45:58 momjian Exp $
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* $PostgreSQL: pgsql/src/include/mb/pg_wchar.h,v 1.79 2008/06/18 18:42:54 momjian Exp $
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*
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* NOTES
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* This is used both by the backend and by libpq, but should not be
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@ -362,6 +362,11 @@ extern int pg_mbcharcliplen(const char *mbstr, int len, int imit);
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extern int pg_encoding_max_length(int encoding);
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extern int pg_database_encoding_max_length(void);
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#ifdef USE_WIDE_UPPER_LOWER
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extern size_t wchar2char(char *to, const wchar_t *from, size_t tolen);
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extern size_t char2wchar(wchar_t *to, size_t tolen, const char *from, size_t fromlen);
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#endif
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extern void SetDefaultClientEncoding(void);
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extern int SetClientEncoding(int encoding, bool doit);
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extern void InitializeClientEncoding(void);
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@ -5,7 +5,7 @@
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*
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* Copyright (c) 1998-2008, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/include/tsearch/ts_locale.h,v 1.6 2008/06/17 16:09:06 momjian Exp $
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* $PostgreSQL: pgsql/src/include/tsearch/ts_locale.h,v 1.7 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -33,9 +33,6 @@
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#ifdef USE_WIDE_UPPER_LOWER
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extern size_t wchar2char(char *to, const wchar_t *from, size_t tolen);
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extern size_t char2wchar(wchar_t *to, size_t tolen, const char *from, size_t fromlen);
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extern int t_isdigit(const char *ptr);
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extern int t_isspace(const char *ptr);
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extern int t_isalpha(const char *ptr);
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@ -6,7 +6,7 @@
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*
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* Copyright (c) 1998-2008, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/include/tsearch/ts_public.h,v 1.9 2008/05/16 16:31:02 tgl Exp $
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* $PostgreSQL: pgsql/src/include/tsearch/ts_public.h,v 1.10 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -62,8 +62,6 @@ typedef struct
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extern char *get_tsearch_config_filename(const char *basename,
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const char *extension);
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extern char *pnstrdup(const char *in, int len);
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/*
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* Often useful stopword list management
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*/
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@ -21,7 +21,7 @@
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* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/palloc.h,v 1.38 2008/01/01 19:45:59 momjian Exp $
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* $PostgreSQL: pgsql/src/include/utils/palloc.h,v 1.39 2008/06/18 18:42:54 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -70,6 +70,8 @@ extern void pfree(void *pointer);
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extern void *repalloc(void *pointer, Size size);
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extern char *pnstrdup(const char *in, int len);
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/*
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* MemoryContextSwitchTo can't be a macro in standard C compilers.
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* But we can make it an inline function when using GCC.
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