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Added Findlocale C module

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http://icculus.org/~aspirin/findlocale/
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Radegast 2013-03-27 17:34:01 +01:00
parent 56a4c118b2
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23
findlocale/LICENSE Normal file
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Copyright (C) 2004 Adam D. Moss (the "Author"). All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is fur-
nished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the Author of the
Software shall not be used in advertising or otherwise to promote the sale,
use or other dealings in this Software without prior written authorization
from the Author.

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FindLocale -- a cross-platform C module for detecting the user's language
Adam D. Moss / adam at steambird.com / adam at gimp.org
This is an early release of a straightforward API which can be used to
detect the user's current preferred (language,country,variant) setting
in a uniform manner across multiple platforms. It is not intended
to provide localization functions, but rather it is a basis on which to
make localization decisions.
Currently, win32 (win95+) and unix-alikes are supported.
Please see example.c and findlocale.h for illumination of this API.
Ports and patches are always welcome.
License: Completely free; see the LICENSE file.
--adam

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v0.46 -- 2005-04-06
* example.c crash-avoidance for C runtimes who hate printfing
NULL strings.
v0.45 -- 2004-10-19
* considerably more comprehensive LCID/LANGID to
(language,country,variant) mapping on win32.
v0.4 -- 2004-10-01
* initial release

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#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef WIN32
#include <windows.h>
#include <winnt.h>
#endif
#include "findlocale.h"
static int
is_lcchar(const int c) {
return isalnum(c);
}
static void
lang_country_variant_from_envstring(const char *str,
char **lang,
char **country,
char **variant) {
int end = 0;
int start;
/* get lang, if any */
start = end;
while (is_lcchar(str[end])) {
++end;
}
if (start != end) {
int i;
int len = end - start;
char *s = malloc(len + 1);
for (i=0; i<len; ++i) {
s[i] = tolower(str[start + i]);
}
s[i] = '\0';
*lang = s;
} else {
*lang = NULL;
}
if (str[end] && str[end]!=':') { /* not at end of str */
++end;
}
/* get country, if any */
start = end;
while (is_lcchar(str[end])) {
++end;
}
if (start != end) {
int i;
int len = end - start;
char *s = malloc(len + 1);
for (i=0; i<len; ++i) {
s[i] = toupper(str[start + i]);
}
s[i] = '\0';
*country = s;
} else {
*country = NULL;
}
if (str[end] && str[end]!=':') { /* not at end of str */
++end;
}
/* get variant, if any */
start = end;
while (str[end] && str[end]!=':') {
++end;
}
if (start != end) {
int i;
int len = end - start;
char *s = malloc(len + 1);
for (i=0; i<len; ++i) {
s[i] = str[start + i];
}
s[i] = '\0';
*variant = s;
} else {
*variant = NULL;
}
}
static int
accumulate_locstring(const char *str, FL_Locale *l) {
char *lang = NULL;
char *country = NULL;
char *variant = NULL;
if (str) {
lang_country_variant_from_envstring(str, &lang, &country, &variant);
if (lang) {
l->lang = lang;
l->country = country;
l->variant = variant;
return 1;
}
}
free(lang); free(country); free(variant);
return 0;
}
static int
accumulate_env(const char *name, FL_Locale *l) {
char *env;
char *lang = NULL;
char *country = NULL;
char *variant = NULL;
env = getenv(name);
if (env) {
return accumulate_locstring(env, l);
}
free(lang); free(country); free(variant);
return 0;
}
static void
canonise_fl(FL_Locale *l) {
/* this function fixes some common locale-specifying mistakes */
/* en_UK -> en_GB */
if (l->lang && 0 == strcmp(l->lang, "en")) {
if (l->country && 0 == strcmp(l->country, "UK")) {
free((void*)l->country);
l->country = strdup("GB");
}
}
/* ja_JA -> ja_JP */
if (l->lang && 0 == strcmp(l->lang, "ja")) {
if (l->country && 0 == strcmp(l->country, "JA")) {
free((void*)l->country);
l->country = strdup("JP");
}
}
}
#ifdef WIN32
#include <stdio.h>
#define ML(pn,sn) MAKELANGID(LANG_##pn, SUBLANG_##pn##_##sn)
#define MLN(pn) MAKELANGID(LANG_##pn, SUBLANG_DEFAULT)
#define RML(pn,sn) MAKELANGID(LANG_##pn, SUBLANG_##sn)
typedef struct {
LANGID id;
char* code;
} IDToCode;
static const IDToCode both_to_code[] = {
{ML(ENGLISH,US), "en_US.ISO_8859-1"},
{ML(ENGLISH,CAN), "en_CA"}, /* english / canadian */
{ML(ENGLISH,UK), "en_GB"},
{ML(ENGLISH,EIRE), "en_IE"},
{ML(ENGLISH,AUS), "en_AU"},
{MLN(GERMAN), "de_DE"},
{MLN(SPANISH), "es_ES"},
{ML(SPANISH,MEXICAN), "es_MX"},
{MLN(FRENCH), "fr_FR"},
{ML(FRENCH,CANADIAN), "fr_CA"},
{ML(FRENCH,BELGIAN), "fr_BE"}, /* ? */
{ML(DUTCH,BELGIAN), "nl_BE"}, /* ? */
{ML(PORTUGUESE,BRAZILIAN), "pt_BR"},
{MLN(PORTUGUESE), "pt_PT"},
{MLN(SWEDISH), "sv_SE"},
{ML(CHINESE,HONGKONG), "zh_HK"},
/* these are machine-generated and not yet verified */
{RML(AFRIKAANS,DEFAULT), "af_ZA"},
{RML(ALBANIAN,DEFAULT), "sq_AL"},
{RML(ARABIC,ARABIC_ALGERIA), "ar_DZ"},
{RML(ARABIC,ARABIC_BAHRAIN), "ar_BH"},
{RML(ARABIC,ARABIC_EGYPT), "ar_EG"},
{RML(ARABIC,ARABIC_IRAQ), "ar_IQ"},
{RML(ARABIC,ARABIC_JORDAN), "ar_JO"},
{RML(ARABIC,ARABIC_KUWAIT), "ar_KW"},
{RML(ARABIC,ARABIC_LEBANON), "ar_LB"},
{RML(ARABIC,ARABIC_LIBYA), "ar_LY"},
{RML(ARABIC,ARABIC_MOROCCO), "ar_MA"},
{RML(ARABIC,ARABIC_OMAN), "ar_OM"},
{RML(ARABIC,ARABIC_QATAR), "ar_QA"},
{RML(ARABIC,ARABIC_SAUDI_ARABIA), "ar_SA"},
{RML(ARABIC,ARABIC_SYRIA), "ar_SY"},
{RML(ARABIC,ARABIC_TUNISIA), "ar_TN"},
{RML(ARABIC,ARABIC_UAE), "ar_AE"},
{RML(ARABIC,ARABIC_YEMEN), "ar_YE"},
{RML(ARMENIAN,DEFAULT), "hy_AM"},
{RML(AZERI,AZERI_CYRILLIC), "az_AZ"},
{RML(AZERI,AZERI_LATIN), "az_AZ"},
{RML(BASQUE,DEFAULT), "eu_ES"},
{RML(BELARUSIAN,DEFAULT), "be_BY"},
/*{RML(BRETON,DEFAULT), "br_FR"},*/
{RML(BULGARIAN,DEFAULT), "bg_BG"},
{RML(CATALAN,DEFAULT), "ca_ES"},
{RML(CHINESE,CHINESE_HONGKONG), "zh_HK"},
{RML(CHINESE,CHINESE_MACAU), "zh_MO"},
{RML(CHINESE,CHINESE_SIMPLIFIED), "zh_CN"},
{RML(CHINESE,CHINESE_SINGAPORE), "zh_SG"},
{RML(CHINESE,CHINESE_TRADITIONAL), "zh_TW"},
/*{RML(CORNISH,DEFAULT), "kw_GB"},*/
{RML(CZECH,DEFAULT), "cs_CZ"},
{RML(DANISH,DEFAULT), "da_DK"},
{RML(DUTCH,DUTCH), "nl_NL"},
{RML(DUTCH,DUTCH_BELGIAN), "nl_BE"},
/*{RML(DUTCH,DUTCH_SURINAM), "nl_SR"},*/
{RML(ENGLISH,ENGLISH_AUS), "en_AU"},
{RML(ENGLISH,ENGLISH_BELIZE), "en_BZ"},
{RML(ENGLISH,ENGLISH_CAN), "en_CA"},
{RML(ENGLISH,ENGLISH_CARIBBEAN), "en_CB"},
{RML(ENGLISH,ENGLISH_EIRE), "en_IE"},
{RML(ENGLISH,ENGLISH_JAMAICA), "en_JM"},
{RML(ENGLISH,ENGLISH_NZ), "en_NZ"},
{RML(ENGLISH,ENGLISH_PHILIPPINES), "en_PH"},
{RML(ENGLISH,ENGLISH_SOUTH_AFRICA), "en_ZA"},
{RML(ENGLISH,ENGLISH_TRINIDAD), "en_TT"},
{RML(ENGLISH,ENGLISH_UK), "en_GB"},
{RML(ENGLISH,ENGLISH_US), "en_US"},
{RML(ENGLISH,ENGLISH_ZIMBABWE), "en_ZW"},
/*{RML(ESPERANTO,DEFAULT), "eo_"},*/
{RML(ESTONIAN,DEFAULT), "et_EE"},
{RML(FAEROESE,DEFAULT), "fo_FO"},
{RML(FARSI,DEFAULT), "fa_IR"},
{RML(FINNISH,DEFAULT), "fi_FI"},
{RML(FRENCH,FRENCH), "fr_FR"},
{RML(FRENCH,FRENCH_BELGIAN), "fr_BE"},
{RML(FRENCH,FRENCH_CANADIAN), "fr_CA"},
{RML(FRENCH,FRENCH_LUXEMBOURG), "fr_LU"},
{RML(FRENCH,FRENCH_MONACO), "fr_MC"},
{RML(FRENCH,FRENCH_SWISS), "fr_CH"},
/*{RML(GAELIC,GAELIC), "ga_IE"},*/
/*{RML(GAELIC,GAELIC_MANX), "gv_GB"},*/
/*{RML(GAELIC,GAELIC_SCOTTISH), "gd_GB"},*/
/*{RML(GALICIAN,DEFAULT), "gl_ES"},*/
{RML(GEORGIAN,DEFAULT), "ka_GE"},
{RML(GERMAN,GERMAN), "de_DE"},
{RML(GERMAN,GERMAN_AUSTRIAN), "de_AT"},
{RML(GERMAN,GERMAN_LIECHTENSTEIN), "de_LI"},
{RML(GERMAN,GERMAN_LUXEMBOURG), "de_LU"},
{RML(GERMAN,GERMAN_SWISS), "de_CH"},
{RML(GREEK,DEFAULT), "el_GR"},
{RML(GUJARATI,DEFAULT), "gu_IN"},
{RML(HEBREW,DEFAULT), "he_IL"},
{RML(HINDI,DEFAULT), "hi_IN"},
{RML(HUNGARIAN,DEFAULT), "hu_HU"},
{RML(ICELANDIC,DEFAULT), "is_IS"},
{RML(INDONESIAN,DEFAULT), "id_ID"},
{RML(ITALIAN,ITALIAN), "it_IT"},
{RML(ITALIAN,ITALIAN_SWISS), "it_CH"},
{RML(JAPANESE,DEFAULT), "ja_JP"},
{RML(KANNADA,DEFAULT), "kn_IN"},
{RML(KAZAK,DEFAULT), "kk_KZ"},
{RML(KONKANI,DEFAULT), "kok_IN"},
{RML(KOREAN,KOREAN), "ko_KR"},
/*{RML(KYRGYZ,DEFAULT), "ky_KG"},*/
{RML(LATVIAN,DEFAULT), "lv_LV"},
{RML(LITHUANIAN,LITHUANIAN), "lt_LT"},
{RML(MACEDONIAN,DEFAULT), "mk_MK"},
{RML(MALAY,MALAY_BRUNEI_DARUSSALAM), "ms_BN"},
{RML(MALAY,MALAY_MALAYSIA), "ms_MY"},
{RML(MARATHI,DEFAULT), "mr_IN"},
/*{RML(MONGOLIAN,DEFAULT), "mn_MN"},*/
{RML(NORWEGIAN,NORWEGIAN_BOKMAL), "nb_NO"},
{RML(NORWEGIAN,NORWEGIAN_NYNORSK), "nn_NO"},
{RML(POLISH,DEFAULT), "pl_PL"},
{RML(PORTUGUESE,PORTUGUESE), "pt_PT"},
{RML(PORTUGUESE,PORTUGUESE_BRAZILIAN), "pt_BR"},
{RML(PUNJABI,DEFAULT), "pa_IN"},
{RML(ROMANIAN,DEFAULT), "ro_RO"},
{RML(RUSSIAN,DEFAULT), "ru_RU"},
{RML(SANSKRIT,DEFAULT), "sa_IN"},
{RML(SERBIAN,DEFAULT), "hr_HR"},
{RML(SERBIAN,SERBIAN_CYRILLIC), "sr_SP"},
{RML(SERBIAN,SERBIAN_LATIN), "sr_SP"},
{RML(SLOVAK,DEFAULT), "sk_SK"},
{RML(SLOVENIAN,DEFAULT), "sl_SI"},
{RML(SPANISH,SPANISH), "es_ES"},
{RML(SPANISH,SPANISH_ARGENTINA), "es_AR"},
{RML(SPANISH,SPANISH_BOLIVIA), "es_BO"},
{RML(SPANISH,SPANISH_CHILE), "es_CL"},
{RML(SPANISH,SPANISH_COLOMBIA), "es_CO"},
{RML(SPANISH,SPANISH_COSTA_RICA), "es_CR"},
{RML(SPANISH,SPANISH_DOMINICAN_REPUBLIC), "es_DO"},
{RML(SPANISH,SPANISH_ECUADOR), "es_EC"},
{RML(SPANISH,SPANISH_EL_SALVADOR), "es_SV"},
{RML(SPANISH,SPANISH_GUATEMALA), "es_GT"},
{RML(SPANISH,SPANISH_HONDURAS), "es_HN"},
{RML(SPANISH,SPANISH_MEXICAN), "es_MX"},
{RML(SPANISH,SPANISH_MODERN), "es_ES"},
{RML(SPANISH,SPANISH_NICARAGUA), "es_NI"},
{RML(SPANISH,SPANISH_PANAMA), "es_PA"},
{RML(SPANISH,SPANISH_PARAGUAY), "es_PY"},
{RML(SPANISH,SPANISH_PERU), "es_PE"},
{RML(SPANISH,SPANISH_PUERTO_RICO), "es_PR"},
{RML(SPANISH,SPANISH_URUGUAY), "es_UY"},
{RML(SPANISH,SPANISH_VENEZUELA), "es_VE"},
{RML(SWAHILI,DEFAULT), "sw_KE"},
{RML(SWEDISH,SWEDISH), "sv_SE"},
{RML(SWEDISH,SWEDISH_FINLAND), "sv_FI"},
/*{RML(SYRIAC,DEFAULT), "syr_SY"},*/
{RML(TAMIL,DEFAULT), "ta_IN"},
{RML(TATAR,DEFAULT), "tt_TA"},
{RML(TELUGU,DEFAULT), "te_IN"},
{RML(THAI,DEFAULT), "th_TH"},
{RML(TURKISH,DEFAULT), "tr_TR"},
{RML(UKRAINIAN,DEFAULT), "uk_UA"},
{RML(URDU,URDU_PAKISTAN), "ur_PK"},
{RML(UZBEK,UZBEK_CYRILLIC), "uz_UZ"},
{RML(UZBEK,UZBEK_LATIN), "uz_UZ"},
{RML(VIETNAMESE,DEFAULT), "vi_VN"},
/*{RML(WALON,DEFAULT), "wa_BE"},*/
/*{RML(WELSH,DEFAULT), "cy_GB"},*/
};
static const IDToCode primary_to_code[] = {
{LANG_AFRIKAANS, "af"},
{LANG_ARABIC, "ar"},
{LANG_AZERI, "az"},
{LANG_BULGARIAN, "bg"},
/*{LANG_BRETON, "br"},*/
{LANG_BELARUSIAN, "by"},
{LANG_CATALAN, "ca"},
{LANG_CZECH, "cs"},
/*{LANG_WELSH, "cy"},*/
{LANG_DANISH, "da"},
{LANG_GERMAN, "de"},
{LANG_GREEK, "el"},
{LANG_ENGLISH, "en"},
/*{LANG_ESPERANTO, "eo"},*/
{LANG_SPANISH, "es"},
{LANG_ESTONIAN, "et"},
{LANG_BASQUE, "eu"},
{LANG_FARSI, "fa"},
{LANG_FINNISH, "fi"},
{LANG_FAEROESE, "fo"},
{LANG_FRENCH, "fr"},
/*{LANG_GAELIC, "ga"},*/
/*{LANG_GALICIAN, "gl"},*/
{LANG_GUJARATI, "gu"},
{LANG_HEBREW, "he"},
{LANG_HINDI, "hi"},
{LANG_SERBIAN, "hr"},
{LANG_HUNGARIAN, "hu"},
{LANG_ARMENIAN, "hy"},
{LANG_INDONESIAN, "id"},
{LANG_ITALIAN, "it"},
{LANG_JAPANESE, "ja"},
{LANG_GEORGIAN, "ka"},
{LANG_KAZAK, "kk"},
{LANG_KANNADA, "kn"},
{LANG_KOREAN, "ko"},
/*{LANG_KYRGYZ, "ky"},*/
{LANG_LITHUANIAN, "lt"},
{LANG_LATVIAN, "lv"},
{LANG_MACEDONIAN, "mk"},
/*{LANG_MONGOLIAN, "mn"},*/
{LANG_MARATHI, "mr"},
{LANG_MALAY, "ms"},
{LANG_NORWEGIAN, "nb"},
{LANG_DUTCH, "nl"},
{LANG_NORWEGIAN, "nn"},
{LANG_NORWEGIAN, "no"},/* unofficial? */
{LANG_PUNJABI, "pa"},
{LANG_POLISH, "pl"},
{LANG_PORTUGUESE, "pt"},
{LANG_ROMANIAN, "ro"},
{LANG_RUSSIAN, "ru"},
{LANG_SLOVAK, "sk"},
{LANG_SLOVENIAN, "sl"},
{LANG_ALBANIAN, "sq"},
{LANG_SERBIAN, "sr"},
{LANG_SWEDISH, "sv"},
{LANG_SWAHILI, "sw"},
{LANG_TAMIL, "ta"},
{LANG_THAI, "th"},
{LANG_TURKISH, "tr"},
{LANG_TATAR, "tt"},
{LANG_UKRAINIAN, "uk"},
{LANG_URDU, "ur"},
{LANG_UZBEK, "uz"},
{LANG_VIETNAMESE, "vi"},
/*{LANG_WALON, "wa"},*/
{LANG_CHINESE, "zh"},
};
static int num_primary_to_code =
sizeof(primary_to_code) / sizeof(*primary_to_code);
static int num_both_to_code =
sizeof(both_to_code) / sizeof(*both_to_code);
static const int
lcid_to_fl(LCID lcid,
FL_Locale *rtn) {
LANGID langid = LANGIDFROMLCID(lcid);
LANGID primary_lang = PRIMARYLANGID(langid);
LANGID sub_lang = SUBLANGID(langid);
int i;
/* try to find an exact primary/sublanguage combo that we know about */
for (i=0; i<num_both_to_code; ++i) {
if (both_to_code[i].id == langid) {
accumulate_locstring(both_to_code[i].code, rtn);
return 1;
}
}
/* fallback to just checking the primary language id */
for (i=0; i<num_primary_to_code; ++i) {
if (primary_to_code[i].id == primary_lang) {
accumulate_locstring(primary_to_code[i].code, rtn);
return 1;
}
}
return 0;
}
#endif
FL_Success
FL_FindLocale(FL_Locale **locale, FL_Domain domain) {
FL_Success success = FL_FAILED;
FL_Locale *rtn = malloc(sizeof(FL_Locale));
rtn->lang = NULL;
rtn->country = NULL;
rtn->variant = NULL;
#ifdef WIN32
/* win32 >= mswindows95 */
{
LCID lcid = GetThreadLocale();
if (lcid_to_fl(lcid, rtn)) {
success = FL_CONFIDENT;
}
if (success == FL_FAILED) {
/* assume US English on mswindows systems unless we know otherwise */
if (accumulate_locstring("en_US.ISO_8859-1", rtn)) {
success = FL_DEFAULT_GUESS;
}
}
}
#else
/* assume unixoid */
{
/* examples: */
/* sv_SE.ISO_8859-1 */
/* fr_FR.ISO8859-1 */
/* no_NO_NB */
/* no_NO_NY */
/* no_NO */
/* de_DE */
/* try the various vars in decreasing order of authority */
if (accumulate_env("LC_ALL", rtn) ||
accumulate_env("LC_MESSAGES", rtn) ||
accumulate_env("LANG", rtn) ||
accumulate_env("LANGUAGE", rtn)) {
success = FL_CONFIDENT;
}
if (success == FL_FAILED) {
/* assume US English on unixoid systems unless we know otherwise */
if (accumulate_locstring("en_US.ISO_8859-1", rtn)) {
success = FL_DEFAULT_GUESS;
}
}
}
#endif
if (success != FL_FAILED) {
canonise_fl(rtn);
}
*locale = rtn;
return success;
}
void
FL_FreeLocale(FL_Locale **locale) {
if (locale) {
FL_Locale *l = *locale;
if (l) {
if (l->lang) {
free((void*)l->lang);
}
if (l->country) {
free((void*)l->country);
}
if (l->variant) {
free((void*)l->variant);
}
free(l);
*locale = NULL;
}
}
}

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#ifndef __findlocale_h_
#define __findlocale_h_
typedef const char* FL_Lang;
typedef const char* FL_Country;
typedef const char* FL_Variant;
typedef struct {
FL_Lang lang;
FL_Country country;
FL_Variant variant;
} FL_Locale;
typedef enum {
/* for some reason we failed to even guess: this should never happen */
FL_FAILED = 0,
/* couldn't query locale -- returning a guess (almost always English) */
FL_DEFAULT_GUESS = 1,
/* the returned locale type was found by successfully asking the system */
FL_CONFIDENT = 2
} FL_Success;
typedef enum {
FL_MESSAGES = 0
} FL_Domain;
/* This allocates/fills in a FL_Locale structure with pointers to
strings (which should be treated as static), or NULL for inappropriate /
undetected fields. */
FL_Success FL_FindLocale(FL_Locale **locale, FL_Domain domain);
/* This should be used to free the struct written by FL_FindLocale */
void FL_FreeLocale(FL_Locale **locale);
#endif /*__findlocale_h_*/