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116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* win32setlocale.c
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* Wrapper to work around bugs in Windows setlocale() implementation
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*
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* Copyright (c) 2011-2014, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/port/win32setlocale.c
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*
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*
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* Windows has a problem with locale names that have a dot in the country
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* name. For example:
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*
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* "Chinese (Traditional)_Hong Kong S.A.R..950"
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*
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* For some reason, setlocale() doesn't accept that. Fortunately, Windows'
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* setlocale() accepts various alternative names for such countries, so we
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* provide a wrapper setlocale() function that maps the troublemaking locale
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* names to accepted aliases.
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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#undef setlocale
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struct locale_map
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{
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const char *locale_name_part; /* string in locale name to replace */
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const char *replacement; /* string to replace it with */
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};
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static const struct locale_map locale_map_list[] = {
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/*
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* "HKG" is listed here:
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* http://msdn.microsoft.com/en-us/library/cdax410z%28v=vs.71%29.aspx
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* (Country/Region Strings).
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*
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* "ARE" is the ISO-3166 three-letter code for U.A.E. It is not on the
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* above list, but seems to work anyway.
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*/
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{"Hong Kong S.A.R.", "HKG"},
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{"U.A.E.", "ARE"},
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/*
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* The ISO-3166 country code for Macau S.A.R. is MAC, but Windows doesn't
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* seem to recognize that. And Macau isn't listed in the table of accepted
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* abbreviations linked above. Fortunately, "ZHM" seems to be accepted as
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* an alias for "Chinese (Traditional)_Macau S.A.R..950". I'm not sure
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* where "ZHM" comes from, must be some legacy naming scheme. But hey, it
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* works.
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*
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* Note that unlike HKG and ARE, ZHM is an alias for the *whole* locale
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* name, not just the country part.
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*
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* Some versions of Windows spell it "Macau", others "Macao".
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*/
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{"Chinese (Traditional)_Macau S.A.R..950", "ZHM"},
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{"Chinese_Macau S.A.R..950", "ZHM"},
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{"Chinese (Traditional)_Macao S.A.R..950", "ZHM"},
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{"Chinese_Macao S.A.R..950", "ZHM"}
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};
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char *
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pgwin32_setlocale(int category, const char *locale)
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{
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char *result;
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char *alias;
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int i;
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if (locale == NULL)
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return setlocale(category, locale);
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/* Check if the locale name matches any of the problematic ones. */
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alias = NULL;
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for (i = 0; i < lengthof(locale_map_list); i++)
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{
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const char *needle = locale_map_list[i].locale_name_part;
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const char *replacement = locale_map_list[i].replacement;
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char *match;
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match = strstr(locale, needle);
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if (match != NULL)
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{
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/* Found a match. Replace the matched string. */
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int matchpos = match - locale;
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int replacementlen = strlen(replacement);
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char *rest = match + strlen(needle);
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int restlen = strlen(rest);
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alias = malloc(matchpos + replacementlen + restlen + 1);
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if (!alias)
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return NULL;
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memcpy(&alias[0], &locale[0], matchpos);
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memcpy(&alias[matchpos], replacement, replacementlen);
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memcpy(&alias[matchpos + replacementlen], rest, restlen + 1); /* includes null
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* terminator */
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break;
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}
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}
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/* Call the real setlocale() function */
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if (alias)
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{
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result = setlocale(category, alias);
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free(alias);
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}
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else
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result = setlocale(category, locale);
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return result;
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}
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