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/*-------------------------------------------------------------------------
*
* win32setlocale.c
* Wrapper to work around bugs in Windows setlocale() implementation
*
* Copyright (c) 2011-2012, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/port/win32setlocale.c
*
*
* Windows has a problem with locale names that have a dot in the country
* name. For example:
*
* "Chinese (Traditional)_Hong Kong S.A.R..950"
*
* For some reason, setlocale() doesn't accept that. Fortunately, Windows'
* setlocale() accepts various alternative names for such countries, so we
* provide a wrapper setlocale() function that maps the troublemaking locale
* names to accepted aliases.
*-------------------------------------------------------------------------
*/
#include "c.h"
#undef setlocale
struct locale_map
{
const char *locale_name_part; /* string in locale name to replace */
const char *replacement; /* string to replace it with */
};
static const struct locale_map locale_map_list[] = {
/*
* "HKG" is listed here:
* http://msdn.microsoft.com/en-us/library/cdax410z%28v=vs.71%29.aspx
* (Country/Region Strings).
*
* "ARE" is the ISO-3166 three-letter code for U.A.E. It is not on the
* above list, but seems to work anyway.
*/
{"Hong Kong S.A.R.", "HKG"},
{"U.A.E.", "ARE"},
/*
* The ISO-3166 country code for Macau S.A.R. is MAC, but Windows doesn't
* seem to recognize that. And Macau isn't listed in the table of accepted
* abbreviations linked above. Fortunately, "ZHM" seems to be accepted as
* an alias for "Chinese (Traditional)_Macau S.A.R..950". I'm not sure
* where "ZHM" comes from, must be some legacy naming scheme. But hey, it
* works.
*
* Note that unlike HKG and ARE, ZHM is an alias for the *whole* locale
* name, not just the country part.
*
* Some versions of Windows spell it "Macau", others "Macao".
*/
{"Chinese (Traditional)_Macau S.A.R..950", "ZHM"},
{"Chinese_Macau S.A.R..950", "ZHM"},
{"Chinese (Traditional)_Macao S.A.R..950", "ZHM"},
{"Chinese_Macao S.A.R..950", "ZHM"}
};
char *
pgwin32_setlocale(int category, const char *locale)
{
char *result;
char *alias;
int i;
if (locale == NULL)
return setlocale(category, locale);
/* Check if the locale name matches any of the problematic ones. */
alias = NULL;
for (i = 0; i < lengthof(locale_map_list); i++)
{
const char *needle = locale_map_list[i].locale_name_part;
const char *replacement = locale_map_list[i].replacement;
char *match;
match = strstr(locale, needle);
if (match != NULL)
{
/* Found a match. Replace the matched string. */
int matchpos = match - locale;
int replacementlen = strlen(replacement);
char *rest = match + strlen(needle);
int restlen = strlen(rest);
alias = malloc(matchpos + replacementlen + restlen + 1);
if (!alias)
return NULL;
memcpy(&alias[0], &locale[0], matchpos);
memcpy(&alias[matchpos], replacement, replacementlen);
memcpy(&alias[matchpos + replacementlen], rest, restlen + 1); /* includes null
* terminator */
break;
}
}
/* Call the real setlocale() function */
if (alias)
{
result = setlocale(category, alias);
free(alias);
}
else
result = setlocale(category, locale);
return result;
}
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