blob: 0b53286db753648d68ddef5b2905091bf39c4b9f [file] [log] [blame]
#include <libintl.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <ctype.h>
#include "locale_impl.h"
#include "atomic.h"
#include "pleval.h"
#include "lock.h"
#include "fork_impl.h"
#define malloc __libc_malloc
#define calloc __libc_calloc
#define realloc undef
#define free undef
struct binding {
struct binding *next;
int dirlen;
volatile int active;
char *domainname;
char *dirname;
char buf[];
};
static void *volatile bindings;
static char *gettextdir(const char *domainname, size_t *dirlen)
{
struct binding *p;
for (p=bindings; p; p=p->next) {
if (!strcmp(p->domainname, domainname) && p->active) {
*dirlen = p->dirlen;
return (char *)p->dirname;
}
}
return 0;
}
static volatile int lock[1];
volatile int *const __gettext_lockptr = lock;
char *bindtextdomain(const char *domainname, const char *dirname)
{
struct binding *p, *q;
if (!domainname) return 0;
if (!dirname) return gettextdir(domainname, &(size_t){0});
size_t domlen = strnlen(domainname, NAME_MAX+1);
size_t dirlen = strnlen(dirname, PATH_MAX);
if (domlen > NAME_MAX || dirlen >= PATH_MAX) {
errno = EINVAL;
return 0;
}
LOCK(lock);
for (p=bindings; p; p=p->next) {
if (!strcmp(p->domainname, domainname) &&
!strcmp(p->dirname, dirname)) {
break;
}
}
if (!p) {
p = calloc(sizeof *p + domlen + dirlen + 2, 1);
if (!p) {
UNLOCK(lock);
return 0;
}
p->next = bindings;
p->dirlen = dirlen;
p->domainname = p->buf;
p->dirname = p->buf + domlen + 1;
memcpy(p->domainname, domainname, domlen+1);
memcpy(p->dirname, dirname, dirlen+1);
a_cas_p(&bindings, bindings, p);
}
a_store(&p->active, 1);
for (q=bindings; q; q=q->next) {
if (!strcmp(q->domainname, domainname) && q != p)
a_store(&q->active, 0);
}
UNLOCK(lock);
return (char *)p->dirname;
}
static const char catnames[][12] = {
"LC_CTYPE",
"LC_NUMERIC",
"LC_TIME",
"LC_COLLATE",
"LC_MONETARY",
"LC_MESSAGES",
};
static const char catlens[] = { 8, 10, 7, 10, 11, 11 };
struct msgcat {
struct msgcat *next;
const void *map;
size_t map_size;
const char *plural_rule;
int nplurals;
struct binding *binding;
const struct __locale_map *lm;
int cat;
};
static char *dummy_gettextdomain()
{
return "messages";
}
weak_alias(dummy_gettextdomain, __gettextdomain);
char *dcngettext(const char *domainname, const char *msgid1, const char *msgid2, unsigned long int n, int category)
{
static struct msgcat *volatile cats;
struct msgcat *p;
struct __locale_struct *loc = CURRENT_LOCALE;
const struct __locale_map *lm;
size_t domlen;
struct binding *q;
int old_errno = errno;
/* match gnu gettext behaviour */
if (!msgid1) goto notrans;
if ((unsigned)category >= LC_ALL) goto notrans;
if (!domainname) domainname = __gettextdomain();
domlen = strnlen(domainname, NAME_MAX+1);
if (domlen > NAME_MAX) goto notrans;
for (q=bindings; q; q=q->next)
if (!strcmp(q->domainname, domainname) && q->active)
break;
if (!q) goto notrans;
lm = loc->cat[category];
if (!lm) {
notrans:
errno = old_errno;
return (char *) ((n == 1) ? msgid1 : msgid2);
}
for (p=cats; p; p=p->next)
if (p->binding == q && p->lm == lm && p->cat == category)
break;
if (!p) {
const char *dirname, *locname, *catname, *modname, *locp;
size_t dirlen, loclen, catlen, modlen, alt_modlen;
void *old_cats;
size_t map_size;
dirname = q->dirname;
locname = lm->name;
catname = catnames[category];
dirlen = q->dirlen;
loclen = strlen(locname);
catlen = catlens[category];
/* Logically split @mod suffix from locale name. */
modname = memchr(locname, '@', loclen);
if (!modname) modname = locname + loclen;
alt_modlen = modlen = loclen - (modname-locname);
loclen = modname-locname;
/* Drop .charset identifier; it is not used. */
const char *csp = memchr(locname, '.', loclen);
if (csp) loclen = csp-locname;
char name[dirlen+1 + loclen+modlen+1 + catlen+1 + domlen+3 + 1];
const void *map;
for (;;) {
snprintf(name, sizeof name, "%s/%.*s%.*s/%s/%s.mo\0",
dirname, (int)loclen, locname,
(int)alt_modlen, modname, catname, domainname);
if (map = __map_file(name, &map_size)) break;
/* Try dropping @mod, _YY, then both. */
if (alt_modlen) {
alt_modlen = 0;
} else if ((locp = memchr(locname, '_', loclen))) {
loclen = locp-locname;
alt_modlen = modlen;
} else {
break;
}
}
if (!map) goto notrans;
p = calloc(sizeof *p, 1);
if (!p) {
__munmap((void *)map, map_size);
goto notrans;
}
p->cat = category;
p->binding = q;
p->lm = lm;
p->map = map;
p->map_size = map_size;
const char *rule = "n!=1;";
unsigned long np = 2;
const char *r = __mo_lookup(p->map, p->map_size, "");
char *z;
while (r && strncmp(r, "Plural-Forms:", 13)) {
z = strchr(r, '\n');
r = z ? z+1 : 0;
}
if (r) {
r += 13;
while (isspace(*r)) r++;
if (!strncmp(r, "nplurals=", 9)) {
np = strtoul(r+9, &z, 10);
r = z;
}
while (*r && *r != ';') r++;
if (*r) {
r++;
while (isspace(*r)) r++;
if (!strncmp(r, "plural=", 7))
rule = r+7;
}
}
p->nplurals = np;
p->plural_rule = rule;
do {
old_cats = cats;
p->next = old_cats;
} while (a_cas_p(&cats, old_cats, p) != old_cats);
}
const char *trans = __mo_lookup(p->map, p->map_size, msgid1);
if (!trans) goto notrans;
/* Non-plural-processing gettext forms pass a null pointer as
* msgid2 to request that dcngettext suppress plural processing. */
if (msgid2 && p->nplurals) {
unsigned long plural = __pleval(p->plural_rule, n);
if (plural > p->nplurals) goto notrans;
while (plural--) {
size_t rem = p->map_size - (trans - (char *)p->map);
size_t l = strnlen(trans, rem);
if (l+1 >= rem)
goto notrans;
trans += l+1;
}
}
errno = old_errno;
return (char *)trans;
}
char *dcgettext(const char *domainname, const char *msgid, int category)
{
return dcngettext(domainname, msgid, 0, 1, category);
}
char *dngettext(const char *domainname, const char *msgid1, const char *msgid2, unsigned long int n)
{
return dcngettext(domainname, msgid1, msgid2, n, LC_MESSAGES);
}
char *dgettext(const char *domainname, const char *msgid)
{
return dcngettext(domainname, msgid, 0, 1, LC_MESSAGES);
}