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- /* finddomain.c -- handle list of needed message catalogs
- Copyright (C) 1995 Software Foundation, Inc.
- Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
-
- 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 <errno.h>
- #include <stdio.h>
- #include <sys/types.h>
-
- #if defined STDC_HEADERS || defined _LIBC
- # include <stdlib.h>
- #else
- # 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
-
- /* @@ 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 stpcpy __stpcpy
- #endif
-
- /* Encoding of locale name parts. */
- #define CEN_REVISION 1
- #define CEN_SPONSOR 2
- #define CEN_SPECIAL 4
- #define XPG_CODESET 8
- #define TERRITORY 16
- #define CEN_AUDIENCE 32
- #define XPG_MODIFIER 64
-
- #define CEN_SPECIFIC (CEN_REVISION|CEN_SPONSOR|CEN_SPECIAL|CEN_AUDIENCE)
- #define XPG_SPECIFIC (XPG_CODESET|XPG_MODIFIER)
-
-
- /* List of already loaded domains. */
- static struct loaded_domain *_nl_loaded_domains;
-
- /* Prototypes for local functions. */
- static struct loaded_domain *make_entry_rec __P ((const char *dirname,
- int mask,
- const char *language,
- const char *territory,
- const char *codeset,
- const char *modifier,
- const char *special,
- const char *sponsor,
- const char *revision,
- const char *domainname,
- int do_allocate));
-
- /* Substitution for systems lacking this function in their C library. */
- #if !_LIBC && !HAVE_STPCPY
- static char *stpcpy __P ((char *dest, const char *src));
- #endif
-
-
- /* Return a data structure describing the message catalog described by
- the DOMAINNAME and CATEGORY parameters with respect to the currently
- established bindings. */
- struct loaded_domain *
- _nl_find_domain (dirname, locale, domainname)
- const char *dirname;
- char *locale;
- const char *domainname;
- {
- enum { undecided, xpg, cen } syntax;
- struct loaded_domain *retval;
- const char *language;
- const char *modifier = NULL;
- const char *territory = NULL;
- const char *codeset = NULL;
- const char *special = NULL;
- const char *sponsor = NULL;
- const char *revision = NULL;
- const char *alias_value = NULL;
- char *cp;
- int mask;
-
- /* CATEGORYVALUE now possibly contains a colon separated list of
- locales. Each single locale can consist of up to four recognized
- parts for the XPG syntax:
-
- language[_territory[.codeset]][@modifier]
-
- and six parts for the CEN syntax:
-
- language[_territory][+audience][+special][,sponsor][_revision]
-
- Beside the first all of them are allowed to be missing. If the
- full specified locale is not found, the less specific one are
- looked for. The various part will be stripped of according to
- the following order:
- (1) revision
- (2) sponsor
- (3) special
- (4) codeset
- (5) territory
- (6) audience/modifier
- */
-
- /* If we have already tested for this locale entry there has to
- be one data set in the list of loaded domains. */
- retval = make_entry_rec (dirname, 0, locale, NULL, NULL, NULL,
- NULL, NULL, NULL, domainname, 0);
- if (retval != NULL)
- {
- /* We know something about this locale. */
- int cnt;
-
- if (retval->decided == 0)
- _nl_load_domain (retval); /* @@@ */
-
- if (retval->data != NULL)
- return retval;
-
- for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
- {
- if (retval->successor[cnt]->decided == 0)
- _nl_load_domain (retval->successor[cnt]);
-
- if (retval->successor[cnt]->data != NULL)
- break;
- }
-
- /* We really found some usable information. */
- return cnt >= 0 ? retval : NULL;
- /* NOTREACHED */
- }
-
- /* See whether the locale value is an alias. If yes its value
- *overwrites* the alias name. No test for the original value is
- done. */
- alias_value = _nl_expand_alias (locale);
- if (alias_value != NULL)
- {
- size_t len = strlen (alias_value) + 1;
- locale = (char *) malloc (len);
- if (locale == NULL)
- return NULL;
-
- memcpy (locale, alias_value, len);
- }
-
- /* Now we determine the single parts of the locale name. First
- look for the language. Termination symbols are `_' and `@' if
- we use XPG4 style, and `_', `+', and `,' if we use CEN syntax. */
- mask = 0;
- syntax = undecided;
- language = cp = locale;
- while (cp[0] != '\0' && cp[0] != '_' && cp[0] != '@'
- && cp[0] != '+' && cp[0] != ',')
- ++cp;
-
- if (language == cp)
- /* This does not make sense: language has to be specified. Use
- this entry as it is without exploding. Perhaps it is an alias. */
- cp = strchr (language, '\0');
- else if (cp[0] == '_')
- {
- /* Next is the territory. */
- cp[0] = '\0';
- territory = ++cp;
-
- while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@'
- && cp[0] != '+' && cp[0] != ',' && cp[0] != '_')
- ++cp;
-
- mask |= TERRITORY;
-
- if (cp[0] == '.')
- {
- /* Next is the codeset. */
- syntax = xpg;
- cp[0] = '\0';
- codeset = ++cp;
-
- while (cp[0] != '\0' && cp[0] != '@')
- ++cp;
-
- mask |= XPG_CODESET;
- }
- }
-
- if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
- {
- /* Next is the modifier. */
- syntax = cp[0] == '@' ? xpg : cen;
- cp[0] = '\0';
- modifier = ++cp;
-
- while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
- && cp[0] != ',' && cp[0] != '_')
- ++cp;
-
- mask |= XPG_MODIFIER | CEN_AUDIENCE;
- }
-
- if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
- {
- syntax = cen;
-
- if (cp[0] == '+')
- {
- /* Next is special application (CEN syntax). */
- cp[0] = '\0';
- special = ++cp;
-
- while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
- ++cp;
-
- mask |= CEN_SPECIAL;
- }
-
- if (cp[0] == ',')
- {
- /* Next is sponsor (CEN syntax). */
- cp[0] = '\0';
- sponsor = ++cp;
-
- while (cp[0] != '\0' && cp[0] != '_')
- ++cp;
-
- mask |= CEN_SPONSOR;
- }
-
- if (cp[0] == '_')
- {
- /* Next is revision (CEN syntax). */
- cp[0] = '\0';
- revision = ++cp;
-
- mask |= CEN_REVISION;
- }
- }
-
- /* For CEN sytnax values it might be important to have the
- separator character in the file name, not for XPG syntax. */
- if (syntax == xpg)
- {
- if (territory != NULL && territory[0] == '\0')
- mask &= ~TERRITORY;
-
- if (codeset != NULL && codeset[0] == '\0')
- mask &= ~XPG_CODESET;
-
- if (modifier != NULL && modifier[0] == '\0')
- mask &= ~XPG_MODIFIER;
- }
-
- /* Create all possible locale entries which might be interested in
- generalzation. */
- retval = make_entry_rec (dirname, mask, language, territory, codeset,
- modifier, special, sponsor, revision,
- domainname, 1);
- if (retval == NULL)
- /* This means we are out of core. */
- return NULL;
-
- if (retval->decided == 0)
- _nl_load_domain (retval);
- if (retval->data == NULL)
- {
- int cnt;
- for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
- {
- if (retval->successor[cnt]->decided == 0)
- _nl_load_domain (retval->successor[cnt]);
- if (retval->successor[cnt]->data != NULL)
- break;
-
- /* Signal that locale is not available. */
- retval->successor[cnt] = NULL;
- }
- if (retval->successor[cnt] == NULL)
- retval = NULL;
- }
-
- /* The room for an alias was dynamically allocated. Free it now. */
- if (alias_value != NULL)
- free (locale);
-
- return retval;
- }
-
-
- static struct loaded_domain *
- make_entry_rec (dirname, mask, language, territory, codeset, modifier,
- special, sponsor, revision, domain, do_allocate)
- const char *dirname;
- int mask;
- const char *language;
- const char *territory;
- const char *codeset;
- const char *modifier;
- const char *special;
- const char *sponsor;
- const char *revision;
- const char *domain;
- int do_allocate;
- {
- char *filename = NULL;
- struct loaded_domain *last = NULL;
- struct loaded_domain *retval;
- char *cp;
- size_t entries;
- int cnt;
-
-
- /* Process the current entry described by the MASK only when it is
- valid. Because the mask can have in the first call bits from
- both syntaces set this is necessary to prevent constructing
- illegal local names. */
- /* FIXME: Rewrite because test is necessary only in first round. */
- if ((mask & CEN_SPECIFIC) == 0 || (mask & XPG_SPECIFIC) == 0)
- {
- /* Allocate room for the full file name. */
- filename = (char *) malloc (strlen (dirname) + 1
- + strlen (language)
- + ((mask & TERRITORY) != 0
- ? strlen (territory) : 0)
- + ((mask & XPG_CODESET) != 0
- ? strlen (codeset) : 0)
- + ((mask & XPG_MODIFIER) != 0 ?
- strlen (modifier) : 0)
- + ((mask & CEN_SPECIAL) != 0
- ? strlen (special) : 0)
- + ((mask & CEN_SPONSOR) != 0
- ? strlen (sponsor) : 0)
- + ((mask & CEN_REVISION) != 0
- ? strlen (revision) : 0) + 1
- + strlen (domain) + 1);
-
- if (filename == NULL)
- return NULL;
-
- retval = NULL;
- last = NULL;
-
- /* Construct file name. */
- cp = stpcpy (filename, dirname);
- *cp++ = '/';
- cp = stpcpy (cp, language);
-
- if ((mask & TERRITORY) != 0)
- {
- *cp++ = '_';
- cp = stpcpy (cp, territory);
- }
- if ((mask & XPG_CODESET) != 0)
- {
- *cp++ = '.';
- cp = stpcpy (cp, codeset);
- }
- if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
- {
- /* This component can be part of both syntaces but has different
- leading characters. For CEN we use `+', else `@'. */
- *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
- cp = stpcpy (cp, modifier);
- }
- if ((mask & CEN_SPECIAL) != 0)
- {
- *cp++ = '+';
- cp = stpcpy (cp, special);
- }
- if ((mask & CEN_SPONSOR) != 0)
- {
- *cp++ = ',';
- cp = stpcpy (cp, sponsor);
- }
- if ((mask & CEN_REVISION) != 0)
- {
- *cp++ = '_';
- cp = stpcpy (cp, revision);
- }
-
- *cp++ = '/';
- stpcpy (cp, domain);
-
- /* Look in list of already loaded domains whether it is already
- available. */
- last = NULL;
- for (retval = _nl_loaded_domains; retval != NULL; retval = retval->next)
- if (retval->filename != NULL)
- {
- int compare = strcmp (retval->filename, filename);
- if (compare == 0)
- /* We found it! */
- break;
- if (compare < 0)
- {
- /* It's not in the list. */
- retval = NULL;
- break;
- }
-
- last = retval;
- }
-
- if (retval != NULL || do_allocate == 0)
- {
- free (filename);
- return retval;
- }
- }
-
- retval = (struct loaded_domain *) malloc (sizeof (*retval));
- if (retval == NULL)
- return NULL;
-
- retval->filename = filename;
- retval->decided = 0;
-
- if (last == NULL)
- {
- retval->next = _nl_loaded_domains;
- _nl_loaded_domains = retval;
- }
- else
- {
- retval->next = last->next;
- last->next = retval;
- }
-
- entries = 0;
- for (cnt = 126; cnt >= 0; --cnt)
- if (cnt < mask && (cnt & ~mask) == 0
- && ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0))
- retval->successor[entries++] = make_entry_rec (dirname, cnt,
- language, territory,
- codeset, modifier,
- special, sponsor,
- revision, domain, 1);
- retval->successor[entries] = NULL;
-
- return retval;
- }
-
-
- /* @@ begin of epilog @@ */
-
- /* 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 !_LIBC && !HAVE_STPCPY
- static char *
- stpcpy (dest, src)
- char *dest;
- const char *src;
- {
- while ((*dest++ = *src++) != '\0')
- /* Do nothing. */ ;
- return dest - 1;
- }
- #endif
-