/***
*setlocal.c - Contains the setlocale function
*
* Copyright (c) 1988-1993, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Contains the setlocale() function.
*
*Revision History:
* 03-21-89 JCR Module created.
* 09-25-89 GJF Fixed copyright. Checked for compatibility with Win 3.0
* 09-25-90 KRS Major rewrite--support more than "C" locale if _INTL.
* 11-05-91 ETC Get 09-25-90 working for C and "" locales; separate
* setlocal.h; add Init functions.
* 12-05-91 ETC Separate nlsdata.c; add mt support; remove calls to
* itself.
* 12-20-91 ETC Added _getlocaleinfo api interface function.
* 09-25-92 KRS Fix for latest NLSAPI changes, etc.
* 01-25-93 KRS Fix for latest changes, clean up code, etc.
* 02-02-93 CFW Many modifications and bug fixes (all under _INTL).
* 02-08-93 CFW Bug fixes and casts to avoid warnings (all under _INTL).
* 02-17-93 CFW Removed re-call of init() functions in case of failure.
* 03-01-93 CFW Check GetQualifiedLocale return value.
* 03-02-93 CFW Added POSIX conformance, check environment variables.
* 03-09-93 CFW Set CP to CP_ACP when changing to C locale.
* 03-17-93 CFW Change expand to expandlocale, prepend _ to internal functions,
* lots of POSIX fixup.
* 03-23-93 CFW Add _ to GetQualifiedLocale call.
* 03-24-93 CFW Change to _get_qualified_locale, support ".codepage".
* 05-10-93 CFW Disallow setlocale(LC_*, ".").
*
*******************************************************************************/
#include <cruntime.h>
#include <locale.h>
#ifdef _INTL
#include <os2dll.h>
#include <malloc.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h> /* for strtol */
#include <setlocal.h>
#ifdef MTHREAD
/*
* Check order of locale category multithread locks.
* (needed by _setlocale_set_cat)
*/
#if _LC_COLLATE_LOCK != _SETLOCALE_LOCK + LC_COLLATE || \
_LC_CTYPE_LOCK != _SETLOCALE_LOCK + LC_CTYPE || \
_LC_MONETARY_LOCK != _SETLOCALE_LOCK + LC_MONETARY || \
_LC_NUMERIC_LOCK != _SETLOCALE_LOCK + LC_NUMERIC || \
_LC_TIME_LOCK != _SETLOCALE_LOCK + LC_TIME
#error Locale category multithread locks are disordered
#endif
#endif /* MTHREAD */
#endif /* _INTL */
/* C locale */
static char _clocalestr[] = "C";
#ifdef _POSIX_
static char _posixlocalestr[] = "POSIX";
#endif
#ifdef _INTL
/* CONSIDER: for granularity, reference from approp component (lconv.c, etc.) */
int _CRTAPI3 _init_collate(void);
int _CRTAPI3 _init_ctype(void);
int _CRTAPI3 _init_monetary(void);
int _CRTAPI3 _init_numeric(void);
int _CRTAPI3 _init_time(void);
int _CRTAPI3 _init_dummy(void);
static struct {
const char * catname;
char * locale;
int (* init)(void);
} _lc_category[LC_MAX-LC_MIN+1] = {
/* code assumes locale initialization is "_clocalestr" */
{ "LC_ALL", NULL, _init_dummy /* never called */ },
{ "LC_COLLATE", _clocalestr, _init_collate },
{ "LC_CTYPE", _clocalestr, _init_ctype },
{ "LC_MONETARY", _clocalestr, _init_monetary },
{ "LC_NUMERIC", _clocalestr, _init_numeric },
{ "LC_TIME", _clocalestr, _init_time }
};
/* CONSIDER: _init_* functions should map to _init_dummy when not linked in */
/* helper function prototypes */
char * _expandlocale(char *, char *, LC_ID *, UINT *, int);
void _strcats(char *, int, ...);
void _lc_lctostr(char *, const LC_STRINGS *);
int _lc_strtolc(LC_STRINGS *, const char *);
static char * _CRTAPI3 _setlocale_set_cat(int, const char *);
static char * _CRTAPI3 _setlocale_get_all(void);
#endif /* _INTL */
/***
*char * setlocale(int category, char *locale) - Set one or all locale categories
*
*Purpose:
* The setlocale() routine allows the user to set one or more of
* the locale categories to the specific locale selected by the
* user. [ANSI]
*
* NOTE: Under !_INTL, the C libraries only support the "C" locale.
* Attempts to change the locale will fail.
*
*Entry:
* int category = One of the locale categories defined in locale.h
* char *locale = String identifying a specific locale or NULL to
* query the current locale.
*
*Exit:
* If supplied locale pointer == NULL:
*
* Return pointer to current locale string and do NOT change
* the current locale.
*
* If supplied locale pointer != NULL:
*
* If locale string is '\0', set locale to default.
*
* If desired setting can be honored, return a pointer to the
* locale string for the appropriate category.
*
* If desired setting can NOT be honored, return NULL.
*
*Exceptions:
* Compound locale strings of the form "LC_COLLATE=xxx;LC_CTYPE=xxx;..."
* are allowed for the LC_ALL category. This is to support the ability
* to restore locales with the returned string, as specified by ANSI.
* Setting the locale with a compound locale string will succeed unless
* *all* categories failed. The returned string will reflect the current
* locale. For example, if LC_CTYPE fails in the above string, setlocale
* will return "LC_COLLATE=xxx;LC_CTYPE=yyy;..." where yyy is the
* previous locale (or the C locale if restoring the previous locale
* also failed). Unrecognized LC_* categories are ignored.
*
*******************************************************************************/
char * _CRTAPI1 setlocale (
int _category,
const char *_locale
)
{
#ifdef _INTL
char * retval;
#endif
/* Validate category */
if ((_category < LC_MIN) || (_category > LC_MAX))
return NULL;
/* Interpret locale */
#ifndef _INTL /* trivial ANSI support */
if ( (_locale == NULL) ||
(_locale[0] == '\0') ||
( (_locale[0]=='C') && (_locale[1]=='\0'))
#ifdef _POSIX_
|| (!strcmp(_locale,"POSIX"))
#endif
)
#ifdef _POSIX_
return _posixlocalestr;
#else
return _clocalestr;
#endif
else
return NULL;
#else /* _INTL */
_mlock (_SETLOCALE_LOCK);
if (_category != LC_ALL)
{
retval = (_locale) ? _setlocale_set_cat(_category,_locale) :
_lc_category[_category].locale;
} else { /* LC_ALL */
char lctemp[MAX_LC_LEN];
int i;
int same = 1;
int fLocaleSet = 0; /* flag to indicate if anything successfully set */
if (_locale != NULL)
{
if ( (_locale[0]=='L') && (_locale[1]=='C') && (_locale[2]=='_') )
{
/* parse compound locale string */
size_t len;
const char * p = _locale; /* start of string to parse */
const char * s;
do {
s = strpbrk(p,"=;");
if ((s==(char *)NULL) || (!(len=s-p)) || (*s==';'))
{
_munlock (_SETLOCALE_LOCK);
return NULL; /* syntax error */
}
/* match with known LC_ strings, if possible, else ignore */
for (i=LC_ALL+1; i<=LC_MAX; i++)
{
if ((!strncmp(_lc_category[i].catname,p,len))
&& (len==strlen(_lc_category[i].catname)))
{
break; /* matched i */
}
} /* no match if (i>LC_MAX) -- just ignore */
if ((!(len = strcspn(++s,";"))) && (*s!=';'))
{
_munlock (_SETLOCALE_LOCK);
return NULL; /* syntax error */
}
if (i<=LC_MAX)
{
/* CONSIDER: check for repeated categories? */
strncpy(lctemp, s, len);
lctemp[len]='\0'; /* null terminate string */
/* don't fail unless all categories fail */
if (_setlocale_set_cat(i,lctemp))
fLocaleSet++; /* record a success */
}
if (*(p = s+len)!='\0')
p++; /* skip ';', if present */
} while (*p);
retval = (fLocaleSet) ? _setlocale_get_all() : NULL;
/* CONSIDER: LC_CTYPE should be done first. _init_monetary for example
will convert wide strings to multibyte (dependent on ctype).
This is currently not a problem; ctype is done second; collate is done
first, but it does not require ctype. */
/* Not necessarily true when a compound locale string is used, but WE always
put it in the right order. */
} else { /* simple LC_ALL locale string */
/* confirm locale is supported, get expanded locale */
if (retval = _expandlocale((char *)_locale, lctemp, NULL, NULL, _category))
{
for (i=LC_MIN; i<=LC_MAX; i++)
{
if (i!=LC_ALL)
{
if (strcmp(lctemp, _lc_category[i].locale))
{
if (_setlocale_set_cat(i, lctemp))
{
fLocaleSet++; /* record a success */
}
else
{
same = 0; /* record a failure */
}
}
else
fLocaleSet++; /* trivial succcess */
}
}
#ifdef _POSIX_
/* special case for POSIX - since LC_ALL expands,
one LC_ALL call may set many different categories,
must assume not same, get full string */
same = 0;
#endif
if (same) /* needn't call setlocale_get_all() if all the same */
{
retval = _setlocale_get_all();
/* retval set above */
free(_lc_category[LC_ALL].locale);
_lc_category[LC_ALL].locale = NULL;
}
else
retval = (fLocaleSet) ? _setlocale_get_all() : NULL;
}
}
} else { /* LC_ALL & NULL */
retval = _setlocale_get_all ();
}
}
/* common exit point */
_munlock (_SETLOCALE_LOCK);
return retval;
#endif /* _INTL */
} /* setlocale */
#ifdef _INTL /* rest are international helpers */
static char * _CRTAPI3 _setlocale_set_cat (
int category,
const char * locale
)
{
char * oldlocale;
LCID oldhandle;
UINT oldcodepage;
LC_ID oldid;
LC_ID idtemp;
UINT cptemp;
char lctemp[MAX_LC_LEN];
char * pch;
/* lock this category to keep other library functions */
/* from using locale handles, information, etc. */
_mlock (_SETLOCALE_LOCK + category);
if (!_expandlocale((char *)locale, lctemp, &idtemp, &cptemp, category))
{
_munlock (_SETLOCALE_LOCK + category);
return NULL; /* unrecognized locale */
}
if (!(pch = (char *)malloc(strlen(lctemp)+1)))
{
_munlock (_SETLOCALE_LOCK + category);
return NULL; /* error if malloc fails */
}
oldlocale = _lc_category[category].locale; /* save for possible restore*/
oldhandle = _lc_handle[category];
memcpy((void *)&oldid, (void *)&_lc_id[category], sizeof(oldid));
oldcodepage = _lc_codepage;
/* update locale string */
_lc_category[category].locale = strcpy(pch,lctemp);
_lc_handle[category] = MAKELCID(idtemp.wLanguage, SORT_DEFAULT);
memcpy((void *)&_lc_id[category], (void *)&idtemp, sizeof(idtemp));
if (category==LC_CTYPE)
_lc_codepage = cptemp;
if (_lc_category[category].init())
{
/* restore previous state! */
_lc_category[category].locale = oldlocale;
free(pch);
_lc_handle[category] = oldhandle;
_lc_codepage = oldcodepage;
_munlock (_SETLOCALE_LOCK + category);
return NULL; /* error if non-zero return */
}
/* locale set up successfully */
/* Cleanup */
if ((oldlocale != _clocalestr)
#ifdef _POSIX_
&& (oldlocale!=_posixlocalestr)
#endif
)
free(oldlocale);
_munlock (_SETLOCALE_LOCK + category);
return _lc_category[category].locale;
} /* _setlocale_set_cat */
static char * _CRTAPI3 _setlocale_get_all (
void
)
{
int i;
int same = 1;
/* allocate memory if necessary */
if (!_lc_category[LC_ALL].locale)
_lc_category[LC_ALL].locale = malloc((MAX_LC_LEN+1) * (LC_MAX-LC_MIN+1) + CATNAMES_LEN);
_lc_category[LC_ALL].locale[0] = '\0';
for (i=LC_MIN+1; ; i++)
{
_strcats(_lc_category[LC_ALL].locale, 3, _lc_category[i].catname,"=",_lc_category[i].locale);
if (i<LC_MAX)
{
strcat(_lc_category[LC_ALL].locale,";");
if (strcmp(_lc_category[i].locale, _lc_category[i+1].locale))
same=0;
}
else
{
if (!same)
return _lc_category[LC_ALL].locale;
else
{
free(_lc_category[LC_ALL].locale); /* free */
_lc_category[LC_ALL].locale = (char *)NULL;
return _lc_category[LC_CTYPE].locale;
}
}
}
} /* _setlocale_get_all */
char * _expandlocale (
char *expr,
char * output,
LC_ID * id,
UINT * cp,
int category
)
{
static LC_ID cacheid = {0, 0, 0};
static UINT cachecp = 0;
static char cachein[MAX_LC_LEN] = "C";
static char cacheout[MAX_LC_LEN] = "C";
if (!expr)
return NULL; /* error if no input */
#ifdef _POSIX_
if (!*expr)
{
/* POSIX: when locale=="", look first at the environment variables:
1) use LC_ALL EV if defined and not null (LC_ALL expands to LC_*)
2) use EV that matches category and is not null
3) use LANG EV if defined and not null
otherwise, we fall through to get system default */
char *envar;
if (category == LC_ALL && (envar = getenv("LC_ALL")))
{
if (!*envar)
{
/* LC_ALL expands to LC_*, set output to "", each category will be
expanded individually */
*output = '\0';
return output;
}
else {
expr = envar;
}
}
else {
if ((envar = getenv(_lc_category[category].catname)) && *envar ||
(envar = getenv("LANG")) && *envar)
{
expr = envar;
}
}
}
#endif /* _POSIX_ */
if (((*expr=='C') && (!expr[1]))
#ifdef _POSIX_
|| (!strcmp(expr, _posixlocalestr))
#endif
) /* for "C" locale, just return */
{
#ifdef _POSIX_
strcpy(output, _posixlocalestr);
#else
*output = 'C';
output[1] = '\0';
#endif
if (id)
{
id->wLanguage = 0;
id->wCountry = 0;
id->wCodePage = 0;
}
if (cp)
{
*cp = CP_ACP; /* return to ANSI code page */
}
return output; /* "C" */
}
/* first, make sure we didn't just do this one */
if (strcmp(cacheout,expr) && strcmp(cachein,expr))
{
/* do some real work */
const LC_STRINGS names;
if (_lc_strtolc((LC_STRINGS *)&names, (const char *)expr))
return NULL; /* syntax error */
if (!_get_qualified_locale((const DWORD)QF_STRINGS, (const LPVOID)&names,
(LPLC_ID)&cacheid, (LPLC_STRINGS)&names))
return NULL; /* locale not recognized/supported */
/* begin: cache atomic section */
cachecp = cacheid.wCodePage;
_lc_lctostr((char *)cacheout, &names);
/* Don't cache "" empty string */
if (*expr)
strcpy(cachein, expr);
else
strcpy(cachein, cacheout);
/* end: cache atomic section */
}
if (id)
memcpy((void *)id, (void *)&cacheid, sizeof(cacheid)); /* possibly return LC_ID */
if (cp)
memcpy((void *)cp, (void *)&cachecp, sizeof(cachecp)); /* possibly return cp */
strcpy(output,cacheout);
return cacheout; /* return fully expanded locale string */
}
/* helpers */
int _CRTAPI3 _init_dummy(void) /* default routine for locale initializer */
{
return 0;
}
void _strcats
(
char *outstr,
int n,
...
)
{
int i;
va_list substr;
va_start (substr, n);
for (i =0; i<n; i++)
{
strcat(outstr, va_arg(substr, char *));
}
va_end(substr);
}
int _lc_strtolc
(
LC_STRINGS *names,
const char *locale
)
{
int i, len;
char ch;
memset((void *)names, '\0', sizeof(LC_STRINGS)); /* clear out result */
if (*locale=='\0')
return 0; /* trivial case */
// only code page is given
if (locale[0] == '.' && locale[1] != '\0')
{
strcpy((char *)names->szCodePage, &locale[1]);
return 0;
}
for (i=0; ; i++)
{
if (!(len=strcspn(locale,"_.,")))
return -1; /* syntax error */
ch = locale[len];
if ((i==0) && (len<MAX_LANG_LEN) && (ch!='.'))
strncpy((char *)names->szLanguage, locale, len);
else if ((i==1) && (len<MAX_CTRY_LEN) && (ch!='_'))
strncpy((char *)names->szCountry, locale, len);
else if ((i==2) && (ch=='\0' || ch==','))
strncpy((char *)names->szCodePage, locale, len);
else
return -1; /* error parsing locale string */
if (ch==',')
{
/* modifier not used in current implementation, but it
must be parsed to for POSIX/XOpen conformance */
/* strncpy(names->szModifier, locale, MAX_MODIFIER_LEN-1); */
break;
}
if (!ch)
break;
locale+=(len+1);
}
return 0;
}
void _lc_lctostr
(
char *locale,
const LC_STRINGS *names
)
{
strcpy(locale, (char *)names->szLanguage);
if (*(names->szCountry))
_strcats(locale, 2, "_", names->szCountry);
if (*(names->szCodePage))
_strcats(locale, 2, ".", names->szCodePage);
/* if (names->szModifier)
_strcats(locale, 2, ",", names->szModifier); */
}
#endif /* _INTL */
