chklocale.c File Reference

#include "postgres.h"
#include <langinfo.h>
#include "mb/pg_wchar.h"

Include dependency graph for chklocale.c:

Go to the source code of this file.

Data Structures
struct	encoding_match

Functions
int	pg_get_encoding_from_locale (const char *ctype, bool write_message)

Variables
static const struct encoding_match	encoding_match_list []

Function Documentation

pg_get_encoding_from_locale()

int pg_get_encoding_from_locale	(	const char *	ctype,
		bool	write_message
	)

Definition at line 305 of file chklocale.c.

{
    char       *sys;
    int         i;
 
#ifndef WIN32
    locale_t    loc;
#endif
 
    /* Get the CODESET property, and also LC_CTYPE if not passed in */
    if (!ctype)
        ctype = setlocale(LC_CTYPE, NULL);
 
 
    /* If locale is C or POSIX, we can allow all encodings */
    if (pg_strcasecmp(ctype, "C") == 0 ||
        pg_strcasecmp(ctype, "POSIX") == 0)
        return PG_SQL_ASCII;
 
 
#ifndef WIN32
    loc = newlocale(LC_CTYPE_MASK, ctype, (locale_t) 0);
    if (loc == (locale_t) 0)
        return -1;              /* bogus ctype passed in? */
 
    sys = nl_langinfo_l(CODESET, loc);
    if (sys)
        sys = strdup(sys);
 
    freelocale(loc);
#else
    sys = win32_get_codeset(ctype);
#endif
 
    if (!sys)
        return -1;              /* out of memory; unlikely */
 
    /* Check the table */
    for (i = 0; encoding_match_list[i].system_enc_name; i++)
    {
        if (pg_strcasecmp(sys, encoding_match_list[i].system_enc_name) == 0)
        {
            free(sys);
            return encoding_match_list[i].pg_enc_code;
        }
    }
 
    /* Special-case kluges for particular platforms go here */
 
#ifdef __darwin__
 
    /*
     * Current macOS has many locales that report an empty string for CODESET,
     * but they all seem to actually use UTF-8.
     */
    if (strlen(sys) == 0)
    {
        free(sys);
        return PG_UTF8;
    }
#endif
 
    /*
     * We print a warning if we got a CODESET string but couldn't recognize
     * it.  This means we need another entry in the table.
     */
    if (write_message)
    {
#ifdef FRONTEND
        fprintf(stderr, _("could not determine encoding for locale \"%s\": codeset is \"%s\""),
                ctype, sys);
        /* keep newline separate so there's only one translatable string */
        fputc('\n', stderr);
#else
        ereport(WARNING,
                (errmsg("could not determine encoding for locale \"%s\": codeset is \"%s\"",
                        ctype, sys)));
#endif
    }
 
    free(sys);
    return -1;
}

Referenced by cache_locale_time(), check_encoding_locale_matches(), check_locale_encoding(), main(), PGLC_localeconv(), pqConnectOptions2(), PQsetClientEncoding(), and setup_locale_encoding().

Variable Documentation

encoding_match_list

const struct encoding_match encoding_match_list[]

static

Definition at line 1 of file chklocale.c.