pg_locale_libc.c File Reference

#include "postgres.h"
#include <limits.h>
#include <wctype.h>
#include "access/htup_details.h"
#include "catalog/pg_database.h"
#include "catalog/pg_collation.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/formatting.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
#include "utils/syscache.h"

Include dependency graph for pg_locale_libc.c:

Go to the source code of this file.

Macros
#define	TEXTBUFLEN   1024

Functions
pg_locale_t	create_pg_locale_libc (Oid collid, MemoryContext context)
size_t	strlower_libc (char *dst, size_t dstsize, const char *src, ssize_t srclen, pg_locale_t locale)
size_t	strtitle_libc (char *dst, size_t dstsize, const char *src, ssize_t srclen, pg_locale_t locale)
size_t	strupper_libc (char *dst, size_t dstsize, const char *src, ssize_t srclen, pg_locale_t locale)
static int	strncoll_libc (const char *arg1, ssize_t len1, const char *arg2, ssize_t len2, pg_locale_t locale)
static size_t	strnxfrm_libc (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
char *	get_collation_actual_version_libc (const char *collcollate)
static locale_t	make_libc_collator (const char *collate, const char *ctype)
static size_t	strlower_libc_sb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
static size_t	strlower_libc_mb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
static size_t	strtitle_libc_sb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
static size_t	strtitle_libc_mb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
static size_t	strupper_libc_sb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
static size_t	strupper_libc_mb (char *dest, size_t destsize, const char *src, ssize_t srclen, pg_locale_t locale)
void	report_newlocale_failure (const char *localename)
static size_t	mbstowcs_l (wchar_t *dest, const char *src, size_t n, locale_t loc)
static size_t	wcstombs_l (char *dest, const wchar_t *src, size_t n, locale_t loc)
size_t	wchar2char (char *to, const wchar_t *from, size_t tolen, pg_locale_t locale)
size_t	char2wchar (wchar_t *to, size_t tolen, const char *from, size_t fromlen, pg_locale_t locale)

Variables
static const struct collate_methods	collate_methods_libc

Macro Definition Documentation

TEXTBUFLEN

#define TEXTBUFLEN   1024

Definition at line 42 of file pg_locale_libc.c.

Function Documentation

char2wchar()

size_t char2wchar	(	wchar_t *	to,
		size_t	tolen,
		const char *	from,
		size_t	fromlen,
		pg_locale_t	locale
	)

Definition at line 936 of file pg_locale_libc.c.

{
    size_t      result;
 
    if (tolen == 0)
        return 0;
 
#ifdef WIN32
    /* See WIN32 "Unicode" comment above */
    if (GetDatabaseEncoding() == PG_UTF8)
    {
        /* Win32 API does not work for zero-length input */
        if (fromlen == 0)
            result = 0;
        else
        {
            result = MultiByteToWideChar(CP_UTF8, 0, from, fromlen, to, tolen - 1);
            /* A zero return is failure */
            if (result == 0)
                result = -1;
        }
 
        if (result != -1)
        {
            Assert(result < tolen);
            /* Append trailing null wchar (MultiByteToWideChar() does not) */
            to[result] = 0;
        }
    }
    else
#endif                          /* WIN32 */
    {
        /* mbstowcs requires ending '\0' */
        char       *str = pnstrdup(from, fromlen);
 
        if (locale == (pg_locale_t) 0)
        {
            /* Use mbstowcs directly for the default locale */
            result = mbstowcs(to, str, tolen);
        }
        else
        {
            /* Use mbstowcs_l for nondefault locales */
            result = mbstowcs_l(to, str, tolen, locale->info.lt);
        }
 
        pfree(str);
    }
 
    if (result == -1)
    {
        /*
         * Invalid multibyte character encountered.  We try to give a useful
         * error message by letting pg_verifymbstr check the string.  But it's
         * possible that the string is OK to us, and not OK to mbstowcs ---
         * this suggests that the LC_CTYPE locale is different from the
         * database encoding.  Give a generic error message if pg_verifymbstr
         * can't find anything wrong.
         */
        pg_verifymbstr(from, fromlen, false);   /* might not return */
        /* but if it does ... */
        ereport(ERROR,
                (errcode(ERRCODE_CHARACTER_NOT_IN_REPERTOIRE),
                 errmsg("invalid multibyte character for locale"),
                 errhint("The server's LC_CTYPE locale is probably incompatible with the database encoding.")));
    }
 
    return result;
}

References Assert(), ereport, errcode(), errhint(), errmsg(), ERROR, GetDatabaseEncoding(), locale, mbstowcs_l(), pfree(), PG_UTF8, pg_verifymbstr(), pnstrdup(), and str.

Referenced by strlower_libc_mb(), strtitle_libc_mb(), strupper_libc_mb(), t_isalnum(), t_isalpha(), and TParserInit().

create_pg_locale_libc()

pg_locale_t create_pg_locale_libc	(	Oid	collid,
		MemoryContext	context
	)

Definition at line 421 of file pg_locale_libc.c.

{
    const char *collate;
    const char *ctype;
    locale_t    loc;
    pg_locale_t result;
 
    if (collid == DEFAULT_COLLATION_OID)
    {
        HeapTuple   tp;
        Datum       datum;
 
        tp = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(MyDatabaseId));
        if (!HeapTupleIsValid(tp))
            elog(ERROR, "cache lookup failed for database %u", MyDatabaseId);
        datum = SysCacheGetAttrNotNull(DATABASEOID, tp,
                                       Anum_pg_database_datcollate);
        collate = TextDatumGetCString(datum);
        datum = SysCacheGetAttrNotNull(DATABASEOID, tp,
                                       Anum_pg_database_datctype);
        ctype = TextDatumGetCString(datum);
 
        ReleaseSysCache(tp);
    }
    else
    {
        HeapTuple   tp;
        Datum       datum;
 
        tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
        if (!HeapTupleIsValid(tp))
            elog(ERROR, "cache lookup failed for collation %u", collid);
 
        datum = SysCacheGetAttrNotNull(COLLOID, tp,
                                       Anum_pg_collation_collcollate);
        collate = TextDatumGetCString(datum);
        datum = SysCacheGetAttrNotNull(COLLOID, tp,
                                       Anum_pg_collation_collctype);
        ctype = TextDatumGetCString(datum);
 
        ReleaseSysCache(tp);
    }
 
 
    loc = make_libc_collator(collate, ctype);
 
    result = MemoryContextAllocZero(context, sizeof(struct pg_locale_struct));
    result->provider = COLLPROVIDER_LIBC;
    result->deterministic = true;
    result->collate_is_c = (strcmp(collate, "C") == 0) ||
        (strcmp(collate, "POSIX") == 0);
    result->ctype_is_c = (strcmp(ctype, "C") == 0) ||
        (strcmp(ctype, "POSIX") == 0);
    result->info.lt = loc;
    if (!result->collate_is_c)
    {
#ifdef WIN32
        if (GetDatabaseEncoding() == PG_UTF8)
            result->collate = &collate_methods_libc_win32_utf8;
        else
#endif
            result->collate = &collate_methods_libc;
    }
 
    return result;
}

References pg_locale_struct::collate, pg_locale_struct::collate_is_c, collate_methods_libc, collid, pg_locale_struct::ctype_is_c, pg_locale_struct::deterministic, elog, ERROR, GetDatabaseEncoding(), HeapTupleIsValid, pg_locale_struct::info, locale_t, pg_locale_struct::lt, make_libc_collator(), MemoryContextAllocZero(), MyDatabaseId, ObjectIdGetDatum(), PG_UTF8, pg_locale_struct::provider, ReleaseSysCache(), SearchSysCache1(), SysCacheGetAttrNotNull(), and TextDatumGetCString.

Referenced by create_pg_locale(), and init_database_collation().

get_collation_actual_version_libc()

char * get_collation_actual_version_libc

(

const char *

collcollate

)

Definition at line 659 of file pg_locale_libc.c.

{
    char       *collversion = NULL;
 
    if (pg_strcasecmp("C", collcollate) != 0 &&
        pg_strncasecmp("C.", collcollate, 2) != 0 &&
        pg_strcasecmp("POSIX", collcollate) != 0)
    {
#if defined(__GLIBC__)
        /* Use the glibc version because we don't have anything better. */
        collversion = pstrdup(gnu_get_libc_version());
#elif defined(LC_VERSION_MASK)
        locale_t    loc;
 
        /* Look up FreeBSD collation version. */
        loc = newlocale(LC_COLLATE_MASK, collcollate, NULL);
        if (loc)
        {
            collversion =
                pstrdup(querylocale(LC_COLLATE_MASK | LC_VERSION_MASK, loc));
            freelocale(loc);
        }
        else
            ereport(ERROR,
                    (errmsg("could not load locale \"%s\"", collcollate)));
#elif defined(WIN32)
        /*
         * If we are targeting Windows Vista and above, we can ask for a name
         * given a collation name (earlier versions required a location code
         * that we don't have).
         */
        NLSVERSIONINFOEX version = {sizeof(NLSVERSIONINFOEX)};
        WCHAR       wide_collcollate[LOCALE_NAME_MAX_LENGTH];
 
        MultiByteToWideChar(CP_ACP, 0, collcollate, -1, wide_collcollate,
                            LOCALE_NAME_MAX_LENGTH);
        if (!GetNLSVersionEx(COMPARE_STRING, wide_collcollate, &version))
        {
            /*
             * GetNLSVersionEx() wants a language tag such as "en-US", not a
             * locale name like "English_United States.1252".  Until those
             * values can be prevented from entering the system, or 100%
             * reliably converted to the more useful tag format, tolerate the
             * resulting error and report that we have no version data.
             */
            if (GetLastError() == ERROR_INVALID_PARAMETER)
                return NULL;
 
            ereport(ERROR,
                    (errmsg("could not get collation version for locale \"%s\": error code %lu",
                            collcollate,
                            GetLastError())));
        }
        collversion = psprintf("%lu.%lu,%lu.%lu",
                               (version.dwNLSVersion >> 8) & 0xFFFF,
                               version.dwNLSVersion & 0xFF,
                               (version.dwDefinedVersion >> 8) & 0xFFFF,
                               version.dwDefinedVersion & 0xFF);
#endif
    }
 
    return collversion;
}

References ereport, errmsg(), ERROR, locale_t, pg_strcasecmp(), pg_strncasecmp(), psprintf(), and pstrdup().

Referenced by get_collation_actual_version().

make_libc_collator()

static locale_t make_libc_collator ( const char *  collate, const char *  ctype  )

static

Definition at line 497 of file pg_locale_libc.c.

{
    locale_t    loc = 0;
 
    if (strcmp(collate, ctype) == 0)
    {
        if (strcmp(ctype, "C") != 0 && strcmp(ctype, "POSIX") != 0)
        {
            /* Normal case where they're the same */
            errno = 0;
#ifndef WIN32
            loc = newlocale(LC_COLLATE_MASK | LC_CTYPE_MASK, collate,
                            NULL);
#else
            loc = _create_locale(LC_ALL, collate);
#endif
            if (!loc)
                report_newlocale_failure(collate);
        }
    }
    else
    {
#ifndef WIN32
        /* We need two newlocale() steps */
        locale_t    loc1 = 0;
 
        if (strcmp(collate, "C") != 0 && strcmp(collate, "POSIX") != 0)
        {
            errno = 0;
            loc1 = newlocale(LC_COLLATE_MASK, collate, NULL);
            if (!loc1)
                report_newlocale_failure(collate);
        }
 
        if (strcmp(ctype, "C") != 0 && strcmp(ctype, "POSIX") != 0)
        {
            errno = 0;
            loc = newlocale(LC_CTYPE_MASK, ctype, loc1);
            if (!loc)
            {
                if (loc1)
                    freelocale(loc1);
                report_newlocale_failure(ctype);
            }
        }
        else
            loc = loc1;
#else
 
        /*
         * XXX The _create_locale() API doesn't appear to support this. Could
         * perhaps be worked around by changing pg_locale_t to contain two
         * separate fields.
         */
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("collations with different collate and ctype values are not supported on this platform")));
#endif
    }
 
    return loc;
}

References ereport, errcode(), errmsg(), ERROR, locale_t, and report_newlocale_failure().

Referenced by create_pg_locale_libc().

mbstowcs_l()

static size_t mbstowcs_l ( wchar_t *  dest, const char *  src, size_t  n, locale_t  loc  )

static

Definition at line 838 of file pg_locale_libc.c.

{
#ifdef WIN32
    return _mbstowcs_l(dest, src, n, loc);
#else
    size_t      result;
    locale_t    save_locale = uselocale(loc);
 
    result = mbstowcs(dest, src, n);
    uselocale(save_locale);
    return result;
#endif
}

References generate_unaccent_rules::dest, and locale_t.

Referenced by char2wchar().

report_newlocale_failure()

void report_newlocale_failure

(

const char *

localename

)

Definition at line 804 of file pg_locale_libc.c.

{
    int         save_errno;
 
    /*
     * Windows doesn't provide any useful error indication from
     * _create_locale(), and BSD-derived platforms don't seem to feel they
     * need to set errno either (even though POSIX is pretty clear that
     * newlocale should do so).  So, if errno hasn't been set, assume ENOENT
     * is what to report.
     */
    if (errno == 0)
        errno = ENOENT;
 
    /*
     * ENOENT means "no such locale", not "no such file", so clarify that
     * errno with an errdetail message.
     */
    save_errno = errno;         /* auxiliary funcs might change errno */
    ereport(ERROR,
            (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
             errmsg("could not create locale \"%s\": %m",
                    localename),
             (save_errno == ENOENT ?
              errdetail("The operating system could not find any locale data for the locale name \"%s\".",
                        localename) : 0)));
}

References ereport, errcode(), errdetail(), errmsg(), and ERROR.

Referenced by cache_locale_time(), and make_libc_collator().

strlower_libc()

size_t strlower_libc	(	char *	dst,
		size_t	dstsize,
		const char *	src,
		ssize_t	srclen,
		pg_locale_t	locale
	)

Definition at line 123 of file pg_locale_libc.c.

{
    if (pg_database_encoding_max_length() > 1)
        return strlower_libc_mb(dst, dstsize, src, srclen, locale);
    else
        return strlower_libc_sb(dst, dstsize, src, srclen, locale);
}

References locale, pg_database_encoding_max_length(), strlower_libc_mb(), and strlower_libc_sb().

Referenced by pg_strfold(), and pg_strlower().

strlower_libc_mb()

static size_t strlower_libc_mb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 190 of file pg_locale_libc.c.

{
    locale_t    loc = locale->info.lt;
    size_t      result_size;
    wchar_t    *workspace;
    char       *result;
    size_t      curr_char;
    size_t      max_size;
 
    if (srclen < 0)
        srclen = strlen(src);
 
    /* Overflow paranoia */
    if ((srclen + 1) > (INT_MAX / sizeof(wchar_t)))
        ereport(ERROR,
                (errcode(ERRCODE_OUT_OF_MEMORY),
                 errmsg("out of memory")));
 
    /* Output workspace cannot have more codes than input bytes */
    workspace = (wchar_t *) palloc((srclen + 1) * sizeof(wchar_t));
 
    char2wchar(workspace, srclen + 1, src, srclen, locale);
 
    for (curr_char = 0; workspace[curr_char] != 0; curr_char++)
        workspace[curr_char] = towlower_l(workspace[curr_char], loc);
 
    /*
     * Make result large enough; case change might change number of bytes
     */
    max_size = curr_char * pg_database_encoding_max_length();
    result = palloc(max_size + 1);
 
    result_size = wchar2char(result, workspace, max_size + 1, locale);
 
    if (result_size + 1 > destsize)
        return result_size;
 
    memcpy(dest, result, result_size);
    dest[result_size] = '\0';
 
    pfree(workspace);
    pfree(result);
 
    return result_size;
}

References char2wchar(), generate_unaccent_rules::dest, ereport, errcode(), errmsg(), ERROR, locale, locale_t, palloc(), pfree(), pg_database_encoding_max_length(), towlower_l, and wchar2char().

Referenced by strlower_libc().

strlower_libc_sb()

static size_t strlower_libc_sb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 153 of file pg_locale_libc.c.

{
    if (srclen < 0)
        srclen = strlen(src);
 
    if (srclen + 1 <= destsize)
    {
        locale_t    loc = locale->info.lt;
        char       *p;
 
        if (srclen + 1 > destsize)
            return srclen;
 
        memcpy(dest, src, srclen);
        dest[srclen] = '\0';
 
        /*
         * Note: we assume that tolower_l() will not be so broken as to need
         * an isupper_l() guard test.  When using the default collation, we
         * apply the traditional Postgres behavior that forces ASCII-style
         * treatment of I/i, but in non-default collations you get exactly
         * what the collation says.
         */
        for (p = dest; *p; p++)
        {
            if (locale->is_default)
                *p = pg_tolower((unsigned char) *p);
            else
                *p = tolower_l((unsigned char) *p, loc);
        }
    }
 
    return srclen;
}

References generate_unaccent_rules::dest, locale, locale_t, pg_tolower(), and tolower_l.

Referenced by strlower_libc().

strncoll_libc()

int strncoll_libc ( const char *  arg1, ssize_t  len1, const char *  arg2, ssize_t  len2, pg_locale_t  locale  )

static

Definition at line 568 of file pg_locale_libc.c.

{
    char        sbuf[TEXTBUFLEN];
    char       *buf = sbuf;
    size_t      bufsize1 = (len1 == -1) ? 0 : len1 + 1;
    size_t      bufsize2 = (len2 == -1) ? 0 : len2 + 1;
    const char *arg1n;
    const char *arg2n;
    int         result;
 
    Assert(locale->provider == COLLPROVIDER_LIBC);
 
    if (bufsize1 + bufsize2 > TEXTBUFLEN)
        buf = palloc(bufsize1 + bufsize2);
 
    /* nul-terminate arguments if necessary */
    if (len1 == -1)
    {
        arg1n = arg1;
    }
    else
    {
        char       *buf1 = buf;
 
        memcpy(buf1, arg1, len1);
        buf1[len1] = '\0';
        arg1n = buf1;
    }
 
    if (len2 == -1)
    {
        arg2n = arg2;
    }
    else
    {
        char       *buf2 = buf + bufsize1;
 
        memcpy(buf2, arg2, len2);
        buf2[len2] = '\0';
        arg2n = buf2;
    }
 
    result = strcoll_l(arg1n, arg2n, locale->info.lt);
 
    if (buf != sbuf)
        pfree(buf);
 
    return result;
}

References Assert(), buf, locale, palloc(), pfree(), strcoll_l, and TEXTBUFLEN.

strnxfrm_libc()

size_t strnxfrm_libc ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 627 of file pg_locale_libc.c.

{
    char        sbuf[TEXTBUFLEN];
    char       *buf = sbuf;
    size_t      bufsize = srclen + 1;
    size_t      result;
 
    Assert(locale->provider == COLLPROVIDER_LIBC);
 
    if (srclen == -1)
        return strxfrm_l(dest, src, destsize, locale->info.lt);
 
    if (bufsize > TEXTBUFLEN)
        buf = palloc(bufsize);
 
    /* nul-terminate argument */
    memcpy(buf, src, srclen);
    buf[srclen] = '\0';
 
    result = strxfrm_l(dest, buf, destsize, locale->info.lt);
 
    if (buf != sbuf)
        pfree(buf);
 
    /* if dest is defined, it should be nul-terminated */
    Assert(result >= destsize || dest[result] == '\0');
 
    return result;
}

References Assert(), buf, bufsize, generate_unaccent_rules::dest, locale, palloc(), pfree(), strxfrm_l, and TEXTBUFLEN.

strtitle_libc()

size_t strtitle_libc	(	char *	dst,
		size_t	dstsize,
		const char *	src,
		ssize_t	srclen,
		pg_locale_t	locale
	)

Definition at line 133 of file pg_locale_libc.c.

{
    if (pg_database_encoding_max_length() > 1)
        return strtitle_libc_mb(dst, dstsize, src, srclen, locale);
    else
        return strtitle_libc_sb(dst, dstsize, src, srclen, locale);
}

References locale, pg_database_encoding_max_length(), strtitle_libc_mb(), and strtitle_libc_sb().

Referenced by pg_strtitle().

strtitle_libc_mb()

static size_t strtitle_libc_mb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 284 of file pg_locale_libc.c.

{
    locale_t    loc = locale->info.lt;
    int         wasalnum = false;
    size_t      result_size;
    wchar_t    *workspace;
    char       *result;
    size_t      curr_char;
    size_t      max_size;
 
    if (srclen < 0)
        srclen = strlen(src);
 
    /* Overflow paranoia */
    if ((srclen + 1) > (INT_MAX / sizeof(wchar_t)))
        ereport(ERROR,
                (errcode(ERRCODE_OUT_OF_MEMORY),
                 errmsg("out of memory")));
 
    /* Output workspace cannot have more codes than input bytes */
    workspace = (wchar_t *) palloc((srclen + 1) * sizeof(wchar_t));
 
    char2wchar(workspace, srclen + 1, src, srclen, locale);
 
    for (curr_char = 0; workspace[curr_char] != 0; curr_char++)
    {
        if (wasalnum)
            workspace[curr_char] = towlower_l(workspace[curr_char], loc);
        else
            workspace[curr_char] = towupper_l(workspace[curr_char], loc);
        wasalnum = iswalnum_l(workspace[curr_char], loc);
    }
 
    /*
     * Make result large enough; case change might change number of bytes
     */
    max_size = curr_char * pg_database_encoding_max_length();
    result = palloc(max_size + 1);
 
    result_size = wchar2char(result, workspace, max_size + 1, locale);
 
    if (result_size + 1 > destsize)
        return result_size;
 
    memcpy(dest, result, result_size);
    dest[result_size] = '\0';
 
    pfree(workspace);
    pfree(result);
 
    return result_size;
}

References char2wchar(), generate_unaccent_rules::dest, ereport, errcode(), errmsg(), ERROR, iswalnum_l, locale, locale_t, palloc(), pfree(), pg_database_encoding_max_length(), towlower_l, towupper_l, and wchar2char().

Referenced by strtitle_libc().

strtitle_libc_sb()

static size_t strtitle_libc_sb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 238 of file pg_locale_libc.c.

{
    if (srclen < 0)
        srclen = strlen(src);
 
    if (srclen + 1 <= destsize)
    {
        locale_t    loc = locale->info.lt;
        int         wasalnum = false;
        char       *p;
 
        memcpy(dest, src, srclen);
        dest[srclen] = '\0';
 
        /*
         * Note: we assume that toupper_l()/tolower_l() will not be so broken
         * as to need guard tests.  When using the default collation, we apply
         * the traditional Postgres behavior that forces ASCII-style treatment
         * of I/i, but in non-default collations you get exactly what the
         * collation says.
         */
        for (p = dest; *p; p++)
        {
            if (locale->is_default)
            {
                if (wasalnum)
                    *p = pg_tolower((unsigned char) *p);
                else
                    *p = pg_toupper((unsigned char) *p);
            }
            else
            {
                if (wasalnum)
                    *p = tolower_l((unsigned char) *p, loc);
                else
                    *p = toupper_l((unsigned char) *p, loc);
            }
            wasalnum = isalnum_l((unsigned char) *p, loc);
        }
    }
 
    return srclen;
}

References generate_unaccent_rules::dest, isalnum_l, locale, locale_t, pg_tolower(), pg_toupper(), tolower_l, and toupper_l.

Referenced by strtitle_libc().

strupper_libc()

size_t strupper_libc	(	char *	dst,
		size_t	dstsize,
		const char *	src,
		ssize_t	srclen,
		pg_locale_t	locale
	)

Definition at line 143 of file pg_locale_libc.c.

{
    if (pg_database_encoding_max_length() > 1)
        return strupper_libc_mb(dst, dstsize, src, srclen, locale);
    else
        return strupper_libc_sb(dst, dstsize, src, srclen, locale);
}

References locale, pg_database_encoding_max_length(), strupper_libc_mb(), and strupper_libc_sb().

Referenced by pg_strupper().

strupper_libc_mb()

static size_t strupper_libc_mb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 373 of file pg_locale_libc.c.

{
    locale_t    loc = locale->info.lt;
    size_t      result_size;
    wchar_t    *workspace;
    char       *result;
    size_t      curr_char;
    size_t      max_size;
 
    if (srclen < 0)
        srclen = strlen(src);
 
    /* Overflow paranoia */
    if ((srclen + 1) > (INT_MAX / sizeof(wchar_t)))
        ereport(ERROR,
                (errcode(ERRCODE_OUT_OF_MEMORY),
                 errmsg("out of memory")));
 
    /* Output workspace cannot have more codes than input bytes */
    workspace = (wchar_t *) palloc((srclen + 1) * sizeof(wchar_t));
 
    char2wchar(workspace, srclen + 1, src, srclen, locale);
 
    for (curr_char = 0; workspace[curr_char] != 0; curr_char++)
        workspace[curr_char] = towupper_l(workspace[curr_char], loc);
 
    /*
     * Make result large enough; case change might change number of bytes
     */
    max_size = curr_char * pg_database_encoding_max_length();
    result = palloc(max_size + 1);
 
    result_size = wchar2char(result, workspace, max_size + 1, locale);
 
    if (result_size + 1 > destsize)
        return result_size;
 
    memcpy(dest, result, result_size);
    dest[result_size] = '\0';
 
    pfree(workspace);
    pfree(result);
 
    return result_size;
}

References char2wchar(), generate_unaccent_rules::dest, ereport, errcode(), errmsg(), ERROR, locale, locale_t, palloc(), pfree(), pg_database_encoding_max_length(), towupper_l, and wchar2char().

Referenced by strupper_libc().

strupper_libc_sb()

static size_t strupper_libc_sb ( char *  dest, size_t  destsize, const char *  src, ssize_t  srclen, pg_locale_t  locale  )

static

Definition at line 339 of file pg_locale_libc.c.

{
    if (srclen < 0)
        srclen = strlen(src);
 
    if (srclen + 1 <= destsize)
    {
        locale_t    loc = locale->info.lt;
        char       *p;
 
        memcpy(dest, src, srclen);
        dest[srclen] = '\0';
 
        /*
         * Note: we assume that toupper_l() will not be so broken as to need
         * an islower_l() guard test.  When using the default collation, we
         * apply the traditional Postgres behavior that forces ASCII-style
         * treatment of I/i, but in non-default collations you get exactly
         * what the collation says.
         */
        for (p = dest; *p; p++)
        {
            if (locale->is_default)
                *p = pg_toupper((unsigned char) *p);
            else
                *p = toupper_l((unsigned char) *p, loc);
        }
    }
 
    return srclen;
}

References generate_unaccent_rules::dest, locale, locale_t, pg_toupper(), and toupper_l.

Referenced by strupper_libc().

wchar2char()

size_t wchar2char	(	char *	to,
		const wchar_t *	from,
		size_t	tolen,
		pg_locale_t	locale
	)

Definition at line 882 of file pg_locale_libc.c.

{
    size_t      result;
 
    if (tolen == 0)
        return 0;
 
#ifdef WIN32
 
    /*
     * On Windows, the "Unicode" locales assume UTF16 not UTF8 encoding, and
     * for some reason mbstowcs and wcstombs won't do this for us, so we use
     * MultiByteToWideChar().
     */
    if (GetDatabaseEncoding() == PG_UTF8)
    {
        result = WideCharToMultiByte(CP_UTF8, 0, from, -1, to, tolen,
                                     NULL, NULL);
        /* A zero return is failure */
        if (result <= 0)
            result = -1;
        else
        {
            Assert(result <= tolen);
            /* Microsoft counts the zero terminator in the result */
            result--;
        }
    }
    else
#endif                          /* WIN32 */
    if (locale == (pg_locale_t) 0)
    {
        /* Use wcstombs directly for the default locale */
        result = wcstombs(to, from, tolen);
    }
    else
    {
        /* Use wcstombs_l for nondefault locales */
        result = wcstombs_l(to, from, tolen, locale->info.lt);
    }
 
    return result;
}

References Assert(), GetDatabaseEncoding(), locale, PG_UTF8, and wcstombs_l().

Referenced by strlower_libc_mb(), strtitle_libc_mb(), and strupper_libc_mb().

wcstombs_l()

static size_t wcstombs_l ( char *  dest, const wchar_t *  src, size_t  n, locale_t  loc  )

static

Definition at line 854 of file pg_locale_libc.c.

{
#ifdef WIN32
    return _wcstombs_l(dest, src, n, loc);
#else
    size_t      result;
    locale_t    save_locale = uselocale(loc);
 
    result = wcstombs(dest, src, n);
    uselocale(save_locale);
    return result;
#endif
}

References generate_unaccent_rules::dest, and locale_t.

Referenced by wchar2char().

Variable Documentation

collate_methods_libc

const struct collate_methods collate_methods_libc

static

Initial value:

= {
    .strncoll = strncoll_libc,
    .strnxfrm = strnxfrm_libc,
    .strnxfrm_prefix = NULL,
 
    
 
 
 
    .strxfrm_is_safe = false,
 
}

Definition at line 88 of file pg_locale_libc.c.

Referenced by create_pg_locale_libc().