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elinks/src/intl/gettext/dcigettext.c
2022-07-17 17:01:54 +02:00

1001 lines
27 KiB
C

/* Implementation of the internal dcigettext function.
Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Tell glibc's <string.h> to provide a prototype for mempcpy().
This must come before <config.h> because <config.h> may include
<features.h>, and once <features.h> has been included, it's too late. */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#if defined HAVE_ALLOCA_H
#include <alloca.h>
#else
#ifdef _AIX
#pragma alloca
#else
#ifndef HAVE_ALLOCA
void *alloca(size_t size);
#endif
#endif
#endif
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#if defined HAVE_UNISTD_H
#include <unistd.h>
#endif
#if defined HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h> /* Needed for alloca() on MingW/Win32 */
#endif
#include "elinks.h"
#include "intl/gettext/gettextP.h"
#include "intl/libintl.h"
#include "intl/gettext/hash-string.h"
#include "util/string.h"
/* Amount to increase buffer size by in each try. */
#define PATH_INCR 32
/* The following is from pathmax.h. */
/* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define
PATH_MAX but might cause redefinition warnings when sys/param.h is
later included (as on MORE/BSD 4.3). */
#include <limits.h>
#ifndef _POSIX_PATH_MAX
#define _POSIX_PATH_MAX 255
#endif
#if !defined PATH_MAX && defined _PC_PATH_MAX
#define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf ("/", _PC_PATH_MAX))
#endif
/* Don't include sys/param.h if it already has been. */
#if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
#include <sys/param.h>
#endif
#if !defined PATH_MAX && defined MAXPATHLEN
#define PATH_MAX MAXPATHLEN
#endif
#ifndef PATH_MAX
#define PATH_MAX _POSIX_PATH_MAX
#endif
/* Pathname support.
IS_ABSOLUTE_PATH(P) tests whether P is an absolute path. If it is not,
it may be concatenated to a directory pathname.
IS_PATH_WITH_DIR(P) tests whether P contains a directory specification.
*/
#if defined _WIN32 || defined __WIN32__ || defined __EMX__ || defined __DJGPP__
/* Win32, OS/2, DOS */
#define HAS_DEVICE(P) (isasciialpha((P)[0]) && (P)[1] == ':')
#define IS_ABSOLUTE_PATH(P) (dir_sep((P)[0]) || HAS_DEVICE (P))
#define IS_PATH_WITH_DIR(P) (strchr ((const char *)(P), '/') || strchr ((const char *)(P), '\\') || HAS_DEVICE (P))
#else
/* Unix */
#define IS_ABSOLUTE_PATH(P) dir_sep((P)[0])
#define IS_PATH_WITH_DIR(P) strchr ((const char *)(P), '/')
#endif
/* XPG3 defines the result of `setlocale (category, NULL)' as:
``Directs `setlocale()' to query `category' and return the current
setting of `local'.''
However it does not specify the exact format. Neither do SUSV2 and
ISO C 99. So we can use this feature only on selected systems (e.g.
those using GNU C Library). */
#if (defined __GNU_LIBRARY__ && __GNU_LIBRARY__ >= 2)
#define HAVE_LOCALE_NULL
#endif
/* This is the type used for the search tree where known translations
are stored. */
struct known_translation_t {
/* Domain in which to search. */
char *domainname;
/* The category. */
int category;
/* State of the catalog counter at the point the string was found. */
int counter;
/* Catalog where the string was found. */
struct loaded_l10nfile *domain;
/* And finally the translation. */
const char *translation;
size_t translation_length;
/* Pointer to the string in question. */
char msgid[1];
};
/* Root of the search tree with known translations. We can use this
only if the system provides the `tsearch' function family. */
#if defined HAVE_TSEARCH
#include <search.h>
static void *root;
/* Function to compare two entries in the table of known translations. */
static int transcmp(const void *p1, const void *p2);
static int
transcmp(const void *p1, const void *p2)
{
const struct known_translation_t *s1;
const struct known_translation_t *s2;
int result;
s1 = (const struct known_translation_t *) p1;
s2 = (const struct known_translation_t *) p2;
result = strcmp(s1->msgid, s2->msgid);
if (result == 0) {
result = strcmp(s1->domainname, s2->domainname);
if (result == 0)
/* We compare the category last (though this is the cheapest
operation) since it is hopefully always the same (namely
LC_MESSAGES). */
result = s1->category - s2->category;
}
return result;
}
#endif
/* Name of the default domain used for gettext(3) prior any call to
textdomain(3). The default value for this is "messages". */
const char _AAA_nl_default_default_domain__[] = "messages";
const char *_nl_default_default_domain__ = (const char *)_AAA_nl_default_default_domain__;
/* Value used as the default domain for gettext(3). */
const char *_nl_current_default_domain__ = (const char *)_AAA_nl_default_default_domain__;
/* Contains the default location of the message catalogs. */
const char _AAA_nl_default_dirname__[] = LOCALEDIR;
const char *_nl_default_dirname__ = (const char *)_AAA_nl_default_dirname__;
/* Contains application-specific LANGUAGE variation, taking precedence to the
* $LANGUAGE environment variable. */
char *LANGUAGE = NULL;
/* List with bindings of specific domains created by bindtextdomain()
calls. */
struct binding *_nl_domain_bindings__;
/* Prototypes for local functions. */
static char *plural_lookup(struct loaded_l10nfile * domain,
unsigned long int n,
const char *translation,
size_t translation_len);
static unsigned long int plural_eval(struct expression * pexp,
unsigned long int n);
static const char *category_to_name(int category);
static const char *guess_category_value(int category,
const char *categoryname);
/* For those loosing systems which don't have `alloca' we have to add
some additional code emulating it. */
#ifdef HAVE_ALLOCA
/* Nothing has to be done. */
#define ADD_BLOCK(list, address) /* nothing */
#define FREE_BLOCKS(list) /* nothing */
#else
struct block_list {
void *address;
struct block_list *next;
};
#define ADD_BLOCK(list, addr) \
do { \
struct block_list *newp = (struct block_list *) malloc(sizeof(*newp)); \
/* If we cannot get a free block we cannot add the new element to \
the list. */ \
if (newp != NULL) { \
newp->address = (addr); \
newp->next = (list); \
(list) = newp; \
} \
} while (0)
#define FREE_BLOCKS(list) \
do { \
while (list != NULL) { \
struct block_list *old = list; \
list = list->next; \
free (old->address); \
free (old); \
} \
} while (0)
#undef alloca
#define alloca(size) (malloc (size))
#endif /* have alloca */
typedef char transmem_block_t;
/* Checking whether the binaries runs SUID must be done and glibc provides
easier methods therefore we make a difference here. */
#ifndef HAVE_GETUID
#define getuid() 0
#endif
#ifndef HAVE_GETGID
#define getgid() 0
#endif
#ifndef HAVE_GETEUID
#define geteuid() getuid()
#endif
#ifndef HAVE_GETEGID
#define getegid() getgid()
#endif
static int enable_secure;
#define ENABLE_SECURE (enable_secure == 1)
#define DETERMINE_SECURE \
if (enable_secure == 0) \
{ \
if (getuid () != geteuid () || getgid () != getegid ()) \
enable_secure = 1; \
else \
enable_secure = -1; \
}
/* Look up MSGID in the DOMAINNAME message catalog for the current
CATEGORY locale and, if PLURAL is nonzero, search over string
depending on the plural form determined by N. */
char *
dcigettext__(const char *domainname, const char *msgid1, const char *msgid2,
int plural, unsigned long int n, int category)
{
#ifndef HAVE_ALLOCA
struct block_list *block_list = NULL;
#endif
struct loaded_l10nfile *domain;
struct binding *binding;
const char *categoryname;
const char *categoryvalue;
char *dirname, *xdomainname;
char *single_locale;
char *retval;
size_t retlen;
int saved_errno;
#if defined HAVE_TSEARCH
struct known_translation_t *search;
struct known_translation_t **foundp = NULL;
size_t msgid_len;
#endif
size_t domainname_len;
/* If no real MSGID is given return NULL. */
if (msgid1 == NULL)
return NULL;
/* If DOMAINNAME is NULL, we are interested in the default domain. If
CATEGORY is not LC_MESSAGES this might not make much sense but the
definition left this undefined. */
if (domainname == NULL)
domainname = _nl_current_default_domain__;
#if defined HAVE_TSEARCH
msgid_len = strlen(msgid1) + 1;
/* Try to find the translation among those which we found at
some time. */
search = (struct known_translation_t *)
alloca(offsetof(struct known_translation_t, msgid) + msgid_len);
memcpy(search->msgid, msgid1, msgid_len);
search->domainname = (char *) domainname;
search->category = category;
foundp = (struct known_translation_t **) tfind(search, &root, transcmp);
if (foundp != NULL && (*foundp)->counter == _nl_msg_cat_cntr) {
/* Now deal with plural. */
if (plural)
retval = plural_lookup((*foundp)->domain, n,
(*foundp)->translation,
(*foundp)->translation_length);
else
retval = (char *) (*foundp)->translation;
return retval;
}
#endif
/* Preserve the `errno' value. */
saved_errno = errno;
/* See whether this is a SUID binary or not. */
DETERMINE_SECURE;
/* First find matching binding. */
for (binding = _nl_domain_bindings__; binding != NULL;
binding = binding->next) {
int compare = strcmp(domainname, binding->domainname);
if (compare == 0)
/* We found it! */
break;
if (compare < 0) {
/* It is not in the list. */
binding = NULL;
break;
}
}
if (binding == NULL)
dirname = (char *) _nl_default_dirname__;
else if (IS_ABSOLUTE_PATH(binding->dirname))
dirname = binding->dirname;
else {
/* We have a relative path. Make it absolute now. */
size_t dirname_len = strlen(binding->dirname) + 1;
size_t path_max;
char *ret;
path_max = (unsigned int) PATH_MAX;
path_max += 2; /* The getcwd docs say to do this. */
for (;;) {
dirname = (char *) alloca(path_max + dirname_len);
ADD_BLOCK(block_list, dirname);
errno = 0;
ret = getcwd(dirname, path_max);
if (ret != NULL || errno != ERANGE)
break;
path_max += path_max / 2;
path_max += PATH_INCR;
}
if (ret == NULL) {
/* We cannot get the current working directory. Don't signal an
error but simply return the default string. */
FREE_BLOCKS(block_list);
errno = saved_errno;
return (plural == 0 ? (char *) msgid1
/* Use the Germanic plural rule. */
: n == 1 ? (char *) msgid1 : (char *) msgid2);
}
stpcpy(stpcpy(strchr(dirname, '\0'), "/"), binding->dirname);
}
/* Now determine the symbolic name of CATEGORY and its value. */
categoryname = category_to_name(category);
categoryvalue = guess_category_value(category, categoryname);
domainname_len = strlen(domainname);
xdomainname = (char *) alloca(strlen(categoryname)
+ domainname_len + 5);
ADD_BLOCK(block_list, xdomainname);
stpcpy((char *)mempcpy(stpcpy(stpcpy(xdomainname, categoryname), "/"),
domainname, domainname_len), ".mo");
/* Creating working area. */
single_locale = (char *) alloca(strlen(categoryvalue) + 1);
ADD_BLOCK(block_list, single_locale);
/* Search for the given string. This is a loop because we perhaps
got an ordered list of languages to consider for the translation. */
while (1) {
/* Make CATEGORYVALUE point to the next element of the list. */
while (categoryvalue[0] != '\0' && categoryvalue[0] == ':')
++categoryvalue;
if (categoryvalue[0] == '\0') {
/* The whole contents of CATEGORYVALUE has been searched but
no valid entry has been found. We solve this situation
by implicitly appending a "C" entry, i.e. no translation
will take place. */
single_locale[0] = 'C';
single_locale[1] = '\0';
} else {
char *cp = single_locale;
while (categoryvalue[0] != '\0'
&& categoryvalue[0] != ':')
*cp++ = *categoryvalue++;
*cp = '\0';
/* When this is a SUID binary we must not allow accessing files
outside the dedicated directories. */
if (ENABLE_SECURE && IS_PATH_WITH_DIR(single_locale))
/* Ingore this entry. */
continue;
}
/* If the current locale value is C (or POSIX) we don't load a
domain. Return the MSGID. */
if (strcmp(single_locale, "C") == 0
|| strcmp(single_locale, "POSIX") == 0) {
FREE_BLOCKS(block_list);
errno = saved_errno;
return (plural == 0 ? (char *) msgid1
/* Use the Germanic plural rule. */
: n == 1 ? (char *) msgid1 : (char *) msgid2);
}
/* Find structure describing the message catalog matching the
DOMAINNAME and CATEGORY. */
domain = _nl_find_domain(dirname, single_locale, xdomainname,
binding);
if (domain != NULL) {
retval = _nl_find_msg(domain, binding, msgid1, &retlen);
if (retval == NULL) {
int cnt;
for (cnt = 0; domain->successor[cnt] != NULL;
++cnt) {
retval = _nl_find_msg(domain->
successor[cnt],
binding, msgid1,
&retlen);
if (retval != NULL) {
domain = domain->successor[cnt];
break;
}
}
}
if (retval != NULL) {
/* Found the translation of MSGID1 in domain DOMAIN:
starting at RETVAL, RETLEN bytes. */
FREE_BLOCKS(block_list);
errno = saved_errno;
#if defined HAVE_TSEARCH
if (foundp == NULL) {
/* Create a new entry and add it to the search tree. */
struct known_translation_t *newp;
newp = (struct known_translation_t *)
malloc(offsetof
(struct
known_translation_t,
msgid)
+ msgid_len +
domainname_len + 1);
if (newp != NULL) {
newp->domainname = (char *)
mempcpy(newp->msgid,
msgid1,
msgid_len);
memcpy(newp->domainname,
domainname,
domainname_len + 1);
newp->category = category;
newp->counter =
_nl_msg_cat_cntr;
newp->domain = domain;
newp->translation = retval;
newp->translation_length =
retlen;
/* Insert the entry in the search tree. */
foundp = (struct
known_translation_t
**)
tsearch(newp, &root,
transcmp);
if (foundp == NULL
|| *foundp != newp)
/* The insert failed. */
free(newp);
}
} else {
/* We can update the existing entry. */
(*foundp)->counter = _nl_msg_cat_cntr;
(*foundp)->domain = domain;
(*foundp)->translation = retval;
(*foundp)->translation_length = retlen;
}
#endif
/* Now deal with plural. */
if (plural)
retval = plural_lookup(domain, n,
retval, retlen);
return retval;
}
}
}
/* NOTREACHED */
}
char *
_nl_find_msg(struct loaded_l10nfile *domain_file,
struct binding *domainbinding,
const char *msgid, size_t *lengthp)
{
struct loaded_domain *domain;
size_t act;
char *result;
size_t resultlen;
if (domain_file->decided == 0)
_nl_load_domain(domain_file, domainbinding);
if (domain_file->data == NULL)
return NULL;
domain = (struct loaded_domain *) domain_file->data;
/* Locate the MSGID and its translation. */
if (domain->hash_size > 2 && domain->hash_tab != NULL) {
/* Use the hashing table. */
nls_uint32 len = strlen(msgid);
nls_uint32 hash_val = hash_string(msgid);
nls_uint32 idx = hash_val % domain->hash_size;
nls_uint32 incr = 1 + (hash_val % (domain->hash_size - 2));
while (1) {
nls_uint32 nstr =
W(domain->must_swap, domain->hash_tab[idx]);
if (nstr == 0)
/* Hash table entry is empty. */
return NULL;
/* Compare msgid with the original string at index nstr-1.
We compare the lengths with >=, not ==, because plural entries
are represented by strings with an embedded NUL. */
if (W
(domain->must_swap,
domain->orig_tab[nstr - 1].length) >= len
&&
(strcmp
(msgid,
domain->data + W(domain->must_swap,
domain->orig_tab[nstr -
1].offset))
== 0)) {
act = nstr - 1;
goto found;
}
if (idx >= domain->hash_size - incr)
idx -= domain->hash_size - incr;
else
idx += incr;
}
/* NOTREACHED */
} else {
/* Try the default method: binary search in the sorted array of
messages. */
size_t top, bottom;
bottom = 0;
top = domain->nstrings;
while (bottom < top) {
int cmp_val;
act = (bottom + top) / 2;
cmp_val = strcmp(msgid, (domain->data
+ W(domain->must_swap,
domain->orig_tab[act].
offset)));
if (cmp_val < 0)
top = act;
else if (cmp_val > 0)
bottom = act + 1;
else
goto found;
}
/* No translation was found. */
return NULL;
}
found:
/* The translation was found at index ACT. If we have to convert the
string to use a different character set, this is the time. */
result = ((char *) domain->data
+ W(domain->must_swap, domain->trans_tab[act].offset));
resultlen = W(domain->must_swap, domain->trans_tab[act].length) + 1;
#if HAVE_ICONV
if (domain->codeset_cntr
!= (domainbinding != NULL ? domainbinding->codeset_cntr : 0)) {
/* The domain's codeset has changed through bind_textdomain_codeset()
since the message catalog was initialized or last accessed. We
have to reinitialize the converter. */
_nl_free_domain_conv(domain);
_nl_init_domain_conv(domain_file, domain, domainbinding);
}
if (domain->conv != (iconv_t) - 1) {
/* We are supposed to do a conversion. First allocate an
appropriate table with the same structure as the table
of translations in the file, where we can put the pointers
to the converted strings in.
There is a slight complication with plural entries. They
are represented by consecutive NUL terminated strings. We
handle this case by converting RESULTLEN bytes, including
NULs. */
if (domain->conv_tab == NULL
&& ((domain->conv_tab = (char **) calloc(domain->nstrings,
sizeof(char *)))
== NULL))
/* Mark that we didn't succeed allocating a table. */
domain->conv_tab = (char **) -1;
if (domain->conv_tab == (char **) -1)
/* Nothing we can do, no more memory. */
goto converted;
if (domain->conv_tab[act] == NULL) {
/* We haven't used this string so far, so it is not
translated yet. Do this now. */
/* We use a bit more efficient memory handling.
We allocate always larger blocks which get used over
time. This is faster than many small allocations. */
#define INITIAL_BLOCK_SIZE 4080
static char *freemem;
static size_t freemem_size;
const char *inbuf;
char *outbuf;
int malloc_count;
transmem_block_t *transmem_list = NULL;
inbuf = (const char *) result;
outbuf = freemem + sizeof(size_t);
malloc_count = 0;
while (1) {
transmem_block_t *newmem;
ICONV_CONST char *inptr = (ICONV_CONST char *) inbuf;
size_t inleft = resultlen;
char *outptr = (char *) outbuf;
size_t outleft;
if (freemem_size < sizeof(size_t))
goto resize_freemem;
outleft = freemem_size - sizeof(size_t);
if (iconv(domain->conv, &inptr, &inleft,
&outptr, &outleft)
!= (size_t) (-1)) {
outbuf = (char *) outptr;
break;
}
if (errno != E2BIG) {
goto converted;
}
resize_freemem:
/* We must allocate a new buffer or resize the old one. */
if (malloc_count > 0) {
++malloc_count;
freemem_size =
malloc_count *
INITIAL_BLOCK_SIZE;
newmem = (transmem_block_t *)
realloc(transmem_list,
freemem_size);
} else {
malloc_count = 1;
freemem_size = INITIAL_BLOCK_SIZE;
newmem = (transmem_block_t *)
malloc(freemem_size);
}
if (newmem == NULL) {
freemem = NULL;
freemem_size = 0;
goto converted;
}
transmem_list = newmem;
freemem = newmem;
outbuf = freemem + sizeof(size_t);
}
/* We have now in our buffer a converted string. Put this
into the table of conversions. */
*(size_t *) freemem = outbuf - freemem - sizeof(size_t);
domain->conv_tab[act] = (char *) freemem;
/* Shrink freemem, but keep it aligned. */
freemem_size -= outbuf - freemem;
freemem = outbuf;
freemem += freemem_size & (alignof(size_t) - 1);
freemem_size = freemem_size & ~(alignof(size_t) - 1);
}
/* Now domain->conv_tab[act] contains the translation of all
the plural variants. */
result = domain->conv_tab[act] + sizeof(size_t);
resultlen = *(size_t *) domain->conv_tab[act];
}
converted:
/* The result string is converted. */
#endif /* HAVE_ICONV */
*lengthp = resultlen;
return result;
}
/* Look up a plural variant. */
static char *
plural_lookup(struct loaded_l10nfile *domain, unsigned long int n,
const char *translation, size_t translation_len)
{
struct loaded_domain *domaindata =
(struct loaded_domain *) domain->data;
unsigned long int indexx;
const char *p;
indexx = plural_eval(domaindata->plural, n);
if (indexx >= domaindata->nplurals)
/* This should never happen. It means the plural expression and the
given maximum value do not match. */
indexx = 0;
/* Skip INDEX strings at TRANSLATION. */
p = translation;
while (indexx-- > 0) {
p = strchr(p, '\0');
/* And skip over the NUL byte. */
p++;
if (p >= translation + translation_len)
/* This should never happen. It means the plural expression
evaluated to a value larger than the number of variants
available for MSGID1. */
return (char *) translation;
}
return (char *) p;
}
/* Function to evaluate the plural expression and return an index value. */
static unsigned long int
plural_eval(struct expression *pexp, unsigned long int n)
{
switch (pexp->nargs) {
case 0:
switch (pexp->operation) {
case var:
return n;
case num:
return pexp->val.num;
default:
break;
}
/* NOTREACHED */
break;
case 1:
{
/* pexp->operation must be lnot. */
unsigned long int arg =
plural_eval(pexp->val.args[0], n);
return !arg;
}
case 2:
{
unsigned long int leftarg =
plural_eval(pexp->val.args[0], n);
if (pexp->operation == lor)
return leftarg
|| plural_eval(pexp->val.
args[1], n);
else if (pexp->operation == land)
return leftarg
&& plural_eval(pexp->val.
args[1], n);
else {
unsigned long int rightarg =
plural_eval(pexp->val.args[1],
n);
switch (pexp->operation) {
case mult:
return leftarg *
rightarg;
case divide:
return leftarg /
rightarg;
case module:
return leftarg %
rightarg;
case plus:
return leftarg +
rightarg;
case minus:
return leftarg -
rightarg;
case less_than:
return leftarg <
rightarg;
case greater_than:
return leftarg >
rightarg;
case less_or_equal:
return leftarg <=
rightarg;
case greater_or_equal:
return leftarg >=
rightarg;
case equal:
return leftarg ==
rightarg;
case not_equal:
return leftarg !=
rightarg;
default:
break;
}
}
/* NOTREACHED */
break;
}
case 3:
{
/* pexp->operation must be qmop. */
unsigned long int boolarg =
plural_eval(pexp->val.args[0], n);
return plural_eval(pexp->val.
args[boolarg ? 1 : 2], n);
}
}
/* NOTREACHED */
return 0;
}
/* Return string representation of locale CATEGORY. */
static const char *
category_to_name(int category)
{
const char *retval;
switch (category) {
#ifdef LC_COLLATE
case LC_COLLATE:
retval = "LC_COLLATE";
break;
#endif
#ifdef LC_CTYPE
case LC_CTYPE:
retval = "LC_CTYPE";
break;
#endif
#ifdef LC_MONETARY
case LC_MONETARY:
retval = "LC_MONETARY";
break;
#endif
#ifdef LC_NUMERIC
case LC_NUMERIC:
retval = "LC_NUMERIC";
break;
#endif
#ifdef LC_TIME
case LC_TIME:
retval = "LC_TIME";
break;
#endif
#ifdef LC_MESSAGES
case LC_MESSAGES:
retval = "LC_MESSAGES";
break;
#endif
#ifdef LC_RESPONSE
case LC_RESPONSE:
retval = "LC_RESPONSE";
break;
#endif
#ifdef LC_ALL
case LC_ALL:
/* This might not make sense but is perhaps better than any other
value. */
retval = "LC_ALL";
break;
#endif
default:
/* If you have a better idea for a default value let me know. */
retval = "LC_XXX";
}
return retval;
}
/* Guess value of current locale from value of the environment variables. */
static const char *
guess_category_value(int category, const char *categoryname)
{
const char *language;
const char *retval;
/* Takes precedence to anything else, damn it's what the application wants!
* ;-) --pasky */
if (LANGUAGE && *LANGUAGE)
return LANGUAGE;
/* The highest priority value is the `LANGUAGE' environment
variable. But we don't use the value if the currently selected
locale is the C locale. This is a GNU extension. */
/* XXX: This GNU extension breaks things for me and I can't see what is it
* good for - I think it only makes things more difficult and arcane, since
* it requires you to set up more variables than LANGUAGE, it's poorly
* documented and so on. If this breaks anything, let me know at
* pasky@ucw.cz, I'm really curious. If LANGUAGE exists, we just use it and
* do no more tests. This is an ELinks extension. --pasky */
language = getenv("LANGUAGE");
if (language && language[0])
return language;
/* We have to proceed with the POSIX methods of looking to `LC_ALL',
`LC_xxx', and `LANG'. On some systems this can be done by the
`setlocale' function itself. */
#if (defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL)
retval = setlocale(category, NULL);
#else
/* Setting of LC_ALL overwrites all other. */
retval = getenv("LC_ALL");
if (retval == NULL || retval[0] == '\0') {
/* Next comes the name of the desired category. */
retval = getenv(categoryname);
if (retval == NULL || retval[0] == '\0') {
/* Last possibility is the LANG environment variable. */
retval = getenv("LANG");
if (retval == NULL || retval[0] == '\0')
/* We use C as the default domain. POSIX says this is
implementation defined. */
retval = "C";
}
}
#endif
return retval;
}