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/* setlocale.c
* Load LC_CTYPE locale only special for uclibc
*
* Written by Vladimir Oleynik (c) vodz@usa.net
*
* This file is part of the uClibc C library and is distributed
* under the GNU Library General Public License.
* used ideas is part of the GNU C Library.
*/
/*
* No-locale-support setlocale() added.
*/
#include <locale.h>
#include <stdio.h> /* NULL, fopen */
#include <stdlib.h> /* malloc */
#include <string.h>
#include <limits.h> /* PATH_MAX */
#include "../ctype/ctype.h"
#undef TEST_LOCALE
#ifdef L_setlocale
#if __UCLIBC_HAS_LOCALE__
static char C_LOCALE_NAME[]="C";
#ifdef TEST_LOCALE
static const char PATH_LOCALE[]="./";
#else
static const char PATH_LOCALE[]=__UCLIBC_LOCALE_DIR;
#endif
static const char LC_CTYPE_STR[]="/LC_CTYPE";
struct SAV_LOADED_LOCALE {
char *locale;
const unsigned char *buf;
struct SAV_LOADED_LOCALE *next;
};
static struct SAV_LOADED_LOCALE sav_loaded_locale [1] = {
{ C_LOCALE_NAME, _uc_ctype_b_C, 0 }
};
static struct SAV_LOADED_LOCALE * old_locale = sav_loaded_locale;
static char *set_new_locale(struct SAV_LOADED_LOCALE * s_locale)
{
_uc_ctype_b = s_locale->buf;
_uc_ctype_trans = s_locale->buf+LOCALE_BUF_SIZE/2;
old_locale = s_locale;
return s_locale->locale;
}
/* Current support only LC_CTYPE or LC_ALL category */
char *setlocale(int category, const char *locale)
{
FILE * fl;
struct SAV_LOADED_LOCALE *cur;
struct SAV_LOADED_LOCALE *bottom;
char full_path[PATH_MAX];
char * buf = 0;
int l;
if(category!=LC_CTYPE && category!=LC_ALL)
return NULL;
if(locale==0)
return set_new_locale(old_locale);
if(strcmp(locale, "POSIX")==0)
return set_new_locale(sav_loaded_locale);
else if(*locale == '\0') {
locale = getenv(LC_CTYPE_STR+1);
if(locale == 0 || *locale == 0)
locale = getenv("LANG");
if(locale == 0 || *locale == '\0')
return set_new_locale(old_locale);
if(strcmp(locale, "POSIX")==0)
return set_new_locale(sav_loaded_locale);
}
for(cur = sav_loaded_locale; cur; cur = cur->next)
if(strcmp(cur->locale, locale)==0)
return set_new_locale(cur);
l = strlen(locale);
if((l+sizeof(PATH_LOCALE)+sizeof(LC_CTYPE_STR))>=PATH_MAX)
return NULL;
strcpy(full_path, PATH_LOCALE);
strcat(full_path, locale);
strcat(full_path, LC_CTYPE_STR);
fl = fopen(full_path, "r");
if(fl==0)
return NULL;
cur = malloc(sizeof(struct SAV_LOADED_LOCALE)+LOCALE_BUF_SIZE+l);
if(cur) {
buf = (char *)(cur+1);
if(fread(buf, 1, LOCALE_BUF_SIZE+1, fl)!=(LOCALE_BUF_SIZE)) {
/* broken locale file */
free(cur);
buf = 0;
#ifdef TEST_LOCALE
fprintf(stderr, "\nbroken locale file\n");
#endif
}
}
fclose(fl);
if(cur==0) /* not enough memory */
return NULL;
if(buf==0) /* broken locale file, set to "C" */
return set_new_locale(sav_loaded_locale);
cur->next = 0;
strcpy(buf+LOCALE_BUF_SIZE, locale);
bottom = sav_loaded_locale;
while(bottom->next!=0)
bottom = bottom->next;
bottom->next = cur;
/* next two line only pedantic */
cur->buf = buf;
cur->locale = buf+LOCALE_BUF_SIZE;
return set_new_locale(cur);
}
#else /* no locale support */
char *setlocale(int category, const char *locale)
{
/* Allow locales "C" and "" (native). Both are "C" for our purposes. */
if (locale) {
if (*locale == 'C') {
++locale;
}
if (*locale) { /* locale wasn't "C" or ""!! */
return NULL;
}
}
/* Allow any legal category for "C" or "" (native) locale. */
if((category < LC_CTYPE) || (category > LC_ALL)) { /* Illegal category! */
return NULL;
}
return "C";
}
#endif
#endif /* L_setlocale */
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