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glibc/intl/dcgettext.c
Roland McGrath 75914335da Fri Nov 10 14:15:21 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> 
* hurd/hurdsig.c (_hurd_internal_post_signal): For SIGNO == 0,
	skip straight to pending check.  When UNTRACED, resume process
	from suspension first.

	* intl/Makefile (headers): New variable, libintl.h.
	[gettext-srcdir]: New rules to copy source from $(gettext-srcdir)/intl.
	* configure.in: Check for --with-gettext arg.

Fri Nov 10 13:51:30 1995  Richard Stallman  <rms@gnu.ai.mit.edu>

	* malloc/malloc.c (get_contiguous_space): New function.
	(morecore): Rewrite allocating new malloc info table.
	(_malloc_internal): Use get_contiguous_space.

Fri Nov 10 13:03:40 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* hurd/hurdexec.c (_hurd_exec): If exec'ing self, pass
	_hurd_msgport to be destroyed.

	* Makerules (installed-libcs): Filter out %_pic.a.

	* hurd/hurdinit.c (_hurd_proc_init): When traced, use msg_sig_post
	to our msgport to take SIGTRAP, instead of _hurd_raise_signal.

	* hurd/Makefile (user-interfaces): Add hurd/process_request.
1995-11-10 20:38:31 +00:00

523 lines
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/* dcgettext.c -- implemenatation of the dcgettext(3) function
Copyright (C) 1995 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. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#ifdef __GNUC__
# define alloca __builtin_alloca
#else
# ifdef HAVE_ALLOCA_H || defined _LIBC
# include <alloca.h>
# else
# ifdef _AIX
#pragma alloca
# else
# ifndef alloca
char *alloca ();
# endif
# endif
# endif
#endif
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#if defined STDC_HEADERS || defined _LIBC
# include <stdlib.h>
#else
char *getenv ();
# ifdef HAVE_MALLOC_H
# include <malloc.h>
# else
void free ();
# endif
#endif
#if defined HAVE_STRING_H || defined _LIBC
# include <string.h>
#else
# include <strings.h>
#endif
#if !HAVE_STRCHR && !defined _LIBC
# ifndef strchr
# define strchr index
# endif
#endif
#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
#endif
#include "gettext.h"
#include "gettextP.h"
#ifdef _LIBC
# include <libintl.h>
#else
# include "libgettext.h"
#endif
#include "hash-string.h"
/* @@ end of prolog @@ */
#ifdef _LIBC
/* Rename the non ANSI C functions. This is required by the standard
because some ANSI C functions will require linking with this object
file and the name space must not be polluted. */
# define getcwd __getcwd
# define stpcpy __stpcpy
#endif
#if !defined HAVE_GETCWD && !defined _LIBC
char *getwd ();
# define getcwd(buf, max) getwd (buf)
#else
char *getcwd ();
#endif
/* 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). */
#if defined(_POSIX_VERSION) || (defined(HAVE_LIMITS_H) && !defined(__GNUC__))
# include <limits.h>
#endif
#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
/* 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. And even worse: POSIX
defines this not at all. So we can use this feature only on selected
system (e.g. those using GNU C Library). */
#ifdef _LIBC
# define HAVE_LOCALE_NULL
#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 _nl_default_default_domain[] = "messages";
/* Value used as the default domain for gettext(3). */
const char *_nl_current_default_domain = _nl_default_default_domain;
/* Contains the default location of the message catalogs. */
const char _nl_default_dirname[] = GNULOCALEDIR;
/* List with bindings of specific domains created by bindtextdomain()
calls. */
struct binding *_nl_domain_bindings;
/* Prototypes for local functions. */
static char *find_msg __P ((struct loaded_domain *domain, const char *msgid));
static const char *category_to_name __P((int category));
static const char *guess_category_value __P((int category,
const char *categoryname));
/* Names for the libintl functions are a problem. They must not clash
with existing names and they should follow ANSI C. But this source
code is also used in GNU C Library where the names have a __
prefix. So we have to make a difference here. */
#ifdef _LIBC
# define DCGETTEXT __dcgettext
#else
# define DCGETTEXT dcgettext__
#endif
/* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY
locale. */
char *
DCGETTEXT (domainname, msgid, category)
const char *domainname;
const char *msgid;
int category;
{
struct loaded_domain *domain;
struct binding *binding;
const char *categoryname;
const char *categoryvalue;
char *dirname, *xdomainname;
char *single_locale;
char *retval;
/* If no real MSGID is given return NULL. */
if (msgid == 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
defintion left this undefined. */
if (domainname == NULL)
domainname = _nl_current_default_domain;
/* 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 (binding->dirname[0] == '/')
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) PATH_MAX;
path_max += 2; /* The getcwd docs say to do this. */
dirname = (char *) alloca (path_max + dirname_len);
errno = 0;
while ((ret = getcwd (dirname, path_max)) == NULL && errno == ERANGE)
{
path_max += PATH_INCR;
dirname = (char *) alloca (path_max + dirname_len);
errno = 0;
}
if (ret == NULL)
/* We cannot get the current working directory. Don't signal an
error but simply return the default string. */
return (char *) msgid;
/* We don't want libintl.a to depend on any other library. So
we avoid the non-standard function stpcpy. In GNU C Library
this function is available, though. Also allow the symbol
HAVE_STPCPY to be defined. */
#if defined _LIBC || defined HAVE_STPCPY
stpcpy (stpcpy (strchr (dirname, '\0'), "/"), binding->dirname);
#else
strcat (dirname, "/");
strcat (dirname, binding->dirname);
#endif
}
/* Now determine the symbolic name of CATEGORY and its value. */
categoryname = category_to_name (category);
categoryvalue = guess_category_value (category, categoryname);
xdomainname = (char *) alloca (strlen (categoryname)
+ strlen (domainname) + 5);
/* We don't want libintl.a to depend on any other library. So we
avoid the non-standard function stpcpy. In GNU C Library this
function is available, though. Also allow the symbol HAVE_STPCPY
to be defined. */
#if defined _LIBC || defined HAVE_STPCPY
stpcpy (stpcpy (stpcpy (stpcpy (xdomainname, categoryname), "/"),
domainname),
".mo");
#else
strcpy (xdomainname, categoryname);
strcat (xdomainname, "/");
strcat (xdomainname, domainname);
strcat (xdomainname, ".mo");
#endif
/* Creating working area. */
single_locale = (char *) alloca (strlen (categoryvalue) + 1);
/* Search for the given string. This is a loop because we perhaps
got an ordered list of languages to consider for th 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 implicitely 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';
}
/* 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)
return (char *) msgid;
/* Find structure describing the message catalog matching the
DOMAINNAME and CATEGORY. */
domain = _nl_find_domain (dirname, single_locale, xdomainname);
if (domain != NULL)
{
retval = find_msg (domain, msgid);
if (retval == NULL)
{
int cnt;
for (cnt = 0; domain->successor[cnt] != NULL; --cnt)
{
retval = find_msg (domain->successor[cnt], msgid);
if (retval != NULL)
break;
}
}
if (retval != NULL)
return retval;
}
}
/* NOTREACHED */
}
#ifdef _LIBC
/* Alias for function name in GNU C Library. */
weak_alias (__dcgettext, dcgettext);
#endif
static char *
find_msg (domain, msgid)
struct loaded_domain *domain;
const char *msgid;
{
size_t top, act, bottom;
if (domain->decided == 0)
_nl_load_domain (domain);
if (domain->data == NULL)
return NULL;
/* 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));
nls_uint32 nstr = W (domain->must_swap, domain->hash_tab[idx]);
if (nstr == 0)
/* Hash table entry is empty. */
return NULL;
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)
return (char *) domain->data + W (domain->must_swap,
domain->trans_tab[nstr - 1].offset);
while (1)
{
if (idx >= W (domain->must_swap, domain->hash_size) - incr)
idx -= W (domain->must_swap, domain->hash_size) - incr;
else
idx += incr;
nstr = W (domain->must_swap, domain->hash_tab[idx]);
if (nstr == 0)
/* Hash table entry is empty. */
return NULL;
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)
return (char *) domain->data
+ W (domain->must_swap, domain->trans_tab[nstr - 1].offset);
}
/* NOTREACHED */
}
/* Now we try the default method: binary search in the sorted
array of messages. */
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
break;
}
/* If an translation is found return this. */
return bottom >= top ? NULL : (char *) domain->data
+ W (domain->must_swap,
domain->trans_tab[act].offset);
}
/* Return string representation of locale CATEGORY. */
static const char *category_to_name (category)
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 (category, categoryname)
int category;
const char *categoryname;
{
const char *retval;
/* The highest priority value is the `LANGUAGE' environment
variable. This is a GNU extension. */
retval = getenv ("LANGUAGE");
if (retval != NULL && retval[0] != '\0')
return retval;
/* `LANGUAGE' is not set. So 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
return setlocale (category, NULL);
#else
/* Setting of LC_ALL overwrites all other. */
retval = getenv ("LC_ALL");
if (retval != NULL && retval[0] != '\0')
return retval;
/* Next comes the name of the desired category. */
retval = getenv (categoryname);
if (retval != NULL && retval[0] != '\0')
return retval;
/* Last possibility is the LANG environment variable. */
retval = getenv ("LANG");
if (retval != NULL && retval[0] != '\0')
return retval;
/* We use C as the default domain. POSIX says this is implementation
defined. */
return "C";
#endif
}
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