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-rw-r--r--intl/finddomain.c476
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diff --git a/intl/finddomain.c b/intl/finddomain.c
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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));
+
+
+/* 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 = 6; cnt >= 0; --cnt)
+ {
+ if (retval->successor[cnt] == 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[0] == '\0')
+ mask &= ~TERRITORY;
+
+ if (codeset[0] == '\0')
+ mask &= ~XPG_CODESET;
+
+ if (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;
+{
+ struct loaded_domain *retval, *last;
+ char *filename, *cp;
+ size_t entries;
+ int cnt;
+
+ /* 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;
+
+ /* 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
+# define stpcpy(p, s) \
+ (strcpy (p, s), strchr (p, '\0'))
+#endif
+
+ /* 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)
+ {
+ 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;
+}
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