mirror of https://github.com/aria2/aria2
401 lines
11 KiB
C
401 lines
11 KiB
C
/* Copyright (C) 1995-1999, 2000-2006 Free Software Foundation, Inc.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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USA. */
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/* Tell glibc's <string.h> to provide a prototype for stpcpy().
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This must come before <config.h> because <config.h> may include
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<features.h>, and once <features.h> has been included, it's too late. */
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE 1
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#if defined _LIBC || defined HAVE_ARGZ_H
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# include <argz.h>
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#endif
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#include <ctype.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include "loadinfo.h"
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/* On some strange systems still no definition of NULL is found. Sigh! */
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#ifndef NULL
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# if defined __STDC__ && __STDC__
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# define NULL ((void *) 0)
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# else
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# define NULL 0
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# endif
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#endif
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/* @@ end of prolog @@ */
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#ifdef _LIBC
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/* Rename the non ANSI C functions. This is required by the standard
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because some ANSI C functions will require linking with this object
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file and the name space must not be polluted. */
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# ifndef stpcpy
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# define stpcpy(dest, src) __stpcpy(dest, src)
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# endif
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#else
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# ifndef HAVE_STPCPY
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static char *stpcpy (char *dest, const char *src);
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# endif
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#endif
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/* Pathname support.
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ISSLASH(C) tests whether C is a directory separator character.
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IS_ABSOLUTE_PATH(P) tests whether P is an absolute path. If it is not,
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it may be concatenated to a directory pathname.
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*/
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#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
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/* Win32, Cygwin, OS/2, DOS */
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# define ISSLASH(C) ((C) == '/' || (C) == '\\')
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# define HAS_DEVICE(P) \
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((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \
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&& (P)[1] == ':')
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# define IS_ABSOLUTE_PATH(P) (ISSLASH ((P)[0]) || HAS_DEVICE (P))
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#else
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/* Unix */
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# define ISSLASH(C) ((C) == '/')
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# define IS_ABSOLUTE_PATH(P) ISSLASH ((P)[0])
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#endif
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/* Define function which are usually not available. */
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#ifdef _LIBC
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# define __argz_count(argz, len) INTUSE(__argz_count) (argz, len)
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#elif defined HAVE_ARGZ_COUNT
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# undef __argz_count
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# define __argz_count argz_count
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#else
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/* Returns the number of strings in ARGZ. */
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static size_t
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argz_count__ (const char *argz, size_t len)
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{
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size_t count = 0;
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while (len > 0)
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{
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size_t part_len = strlen (argz);
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argz += part_len + 1;
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len -= part_len + 1;
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count++;
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}
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return count;
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}
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# undef __argz_count
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# define __argz_count(argz, len) argz_count__ (argz, len)
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#endif /* !_LIBC && !HAVE_ARGZ_COUNT */
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#ifdef _LIBC
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# define __argz_stringify(argz, len, sep) \
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INTUSE(__argz_stringify) (argz, len, sep)
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#elif defined HAVE_ARGZ_STRINGIFY
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# undef __argz_stringify
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# define __argz_stringify argz_stringify
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#else
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/* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
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except the last into the character SEP. */
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static void
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argz_stringify__ (char *argz, size_t len, int sep)
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{
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while (len > 0)
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{
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size_t part_len = strlen (argz);
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argz += part_len;
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len -= part_len + 1;
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if (len > 0)
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*argz++ = sep;
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}
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}
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# undef __argz_stringify
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# define __argz_stringify(argz, len, sep) argz_stringify__ (argz, len, sep)
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#endif /* !_LIBC && !HAVE_ARGZ_STRINGIFY */
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#ifdef _LIBC
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#elif defined HAVE_ARGZ_NEXT
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# undef __argz_next
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# define __argz_next argz_next
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#else
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static char *
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argz_next__ (char *argz, size_t argz_len, const char *entry)
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{
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if (entry)
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{
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if (entry < argz + argz_len)
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entry = strchr (entry, '\0') + 1;
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return entry >= argz + argz_len ? NULL : (char *) entry;
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}
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else
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if (argz_len > 0)
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return argz;
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else
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return 0;
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}
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# undef __argz_next
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# define __argz_next(argz, len, entry) argz_next__ (argz, len, entry)
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#endif /* !_LIBC && !HAVE_ARGZ_NEXT */
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/* Return number of bits set in X. */
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static inline int
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pop (int x)
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{
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/* We assume that no more than 16 bits are used. */
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x = ((x & ~0x5555) >> 1) + (x & 0x5555);
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x = ((x & ~0x3333) >> 2) + (x & 0x3333);
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x = ((x >> 4) + x) & 0x0f0f;
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x = ((x >> 8) + x) & 0xff;
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return x;
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}
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struct loaded_l10nfile *
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_nl_make_l10nflist (struct loaded_l10nfile **l10nfile_list,
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const char *dirlist, size_t dirlist_len,
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int mask, const char *language, const char *territory,
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const char *codeset, const char *normalized_codeset,
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const char *modifier,
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const char *filename, int do_allocate)
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{
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char *abs_filename;
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struct loaded_l10nfile **lastp;
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struct loaded_l10nfile *retval;
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char *cp;
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size_t dirlist_count;
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size_t entries;
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int cnt;
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/* If LANGUAGE contains an absolute directory specification, we ignore
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DIRLIST. */
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if (IS_ABSOLUTE_PATH (language))
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dirlist_len = 0;
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/* Allocate room for the full file name. */
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abs_filename = (char *) malloc (dirlist_len
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+ strlen (language)
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+ ((mask & XPG_TERRITORY) != 0
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? strlen (territory) + 1 : 0)
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+ ((mask & XPG_CODESET) != 0
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? strlen (codeset) + 1 : 0)
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+ ((mask & XPG_NORM_CODESET) != 0
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? strlen (normalized_codeset) + 1 : 0)
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+ ((mask & XPG_MODIFIER) != 0
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? strlen (modifier) + 1 : 0)
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+ 1 + strlen (filename) + 1);
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if (abs_filename == NULL)
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return NULL;
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/* Construct file name. */
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cp = abs_filename;
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if (dirlist_len > 0)
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{
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memcpy (cp, dirlist, dirlist_len);
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__argz_stringify (cp, dirlist_len, PATH_SEPARATOR);
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cp += dirlist_len;
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cp[-1] = '/';
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}
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cp = stpcpy (cp, language);
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if ((mask & XPG_TERRITORY) != 0)
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{
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*cp++ = '_';
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cp = stpcpy (cp, territory);
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}
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if ((mask & XPG_CODESET) != 0)
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{
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*cp++ = '.';
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cp = stpcpy (cp, codeset);
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}
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if ((mask & XPG_NORM_CODESET) != 0)
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{
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*cp++ = '.';
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cp = stpcpy (cp, normalized_codeset);
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}
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if ((mask & XPG_MODIFIER) != 0)
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{
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*cp++ = '@';
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cp = stpcpy (cp, modifier);
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}
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*cp++ = '/';
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stpcpy (cp, filename);
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/* Look in list of already loaded domains whether it is already
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available. */
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lastp = l10nfile_list;
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for (retval = *l10nfile_list; retval != NULL; retval = retval->next)
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if (retval->filename != NULL)
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{
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int compare = strcmp (retval->filename, abs_filename);
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if (compare == 0)
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/* We found it! */
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break;
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if (compare < 0)
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{
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/* It's not in the list. */
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retval = NULL;
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break;
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}
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lastp = &retval->next;
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}
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if (retval != NULL || do_allocate == 0)
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{
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free (abs_filename);
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return retval;
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}
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dirlist_count = (dirlist_len > 0 ? __argz_count (dirlist, dirlist_len) : 1);
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/* Allocate a new loaded_l10nfile. */
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retval =
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(struct loaded_l10nfile *)
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malloc (sizeof (*retval)
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+ (((dirlist_count << pop (mask)) + (dirlist_count > 1 ? 1 : 0))
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* sizeof (struct loaded_l10nfile *)));
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if (retval == NULL)
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{
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free (abs_filename);
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return NULL;
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}
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retval->filename = abs_filename;
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/* We set retval->data to NULL here; it is filled in later.
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Setting retval->decided to 1 here means that retval does not
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correspond to a real file (dirlist_count > 1) or is not worth
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looking up (if an unnormalized codeset was specified). */
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retval->decided = (dirlist_count > 1
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|| ((mask & XPG_CODESET) != 0
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&& (mask & XPG_NORM_CODESET) != 0));
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retval->data = NULL;
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retval->next = *lastp;
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*lastp = retval;
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entries = 0;
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/* Recurse to fill the inheritance list of RETVAL.
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If the DIRLIST is a real list (i.e. DIRLIST_COUNT > 1), the RETVAL
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entry does not correspond to a real file; retval->filename contains
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colons. In this case we loop across all elements of DIRLIST and
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across all bit patterns dominated by MASK.
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If the DIRLIST is a single directory or entirely redundant (i.e.
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DIRLIST_COUNT == 1), we loop across all bit patterns dominated by
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MASK, excluding MASK itself.
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In either case, we loop down from MASK to 0. This has the effect
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that the extra bits in the locale name are dropped in this order:
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first the modifier, then the territory, then the codeset, then the
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normalized_codeset. */
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for (cnt = dirlist_count > 1 ? mask : mask - 1; cnt >= 0; --cnt)
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if ((cnt & ~mask) == 0
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&& !((cnt & XPG_CODESET) != 0 && (cnt & XPG_NORM_CODESET) != 0))
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{
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if (dirlist_count > 1)
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{
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/* Iterate over all elements of the DIRLIST. */
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char *dir = NULL;
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while ((dir = __argz_next ((char *) dirlist, dirlist_len, dir))
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!= NULL)
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retval->successor[entries++]
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= _nl_make_l10nflist (l10nfile_list, dir, strlen (dir) + 1,
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cnt, language, territory, codeset,
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normalized_codeset, modifier, filename,
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1);
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}
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else
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retval->successor[entries++]
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= _nl_make_l10nflist (l10nfile_list, dirlist, dirlist_len,
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cnt, language, territory, codeset,
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normalized_codeset, modifier, filename, 1);
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}
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retval->successor[entries] = NULL;
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return retval;
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}
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/* Normalize codeset name. There is no standard for the codeset
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names. Normalization allows the user to use any of the common
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names. The return value is dynamically allocated and has to be
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freed by the caller. */
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const char *
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_nl_normalize_codeset (const char *codeset, size_t name_len)
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{
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int len = 0;
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int only_digit = 1;
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char *retval;
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char *wp;
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size_t cnt;
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for (cnt = 0; cnt < name_len; ++cnt)
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if (isalnum ((unsigned char) codeset[cnt]))
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{
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++len;
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if (isalpha ((unsigned char) codeset[cnt]))
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only_digit = 0;
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}
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retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);
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if (retval != NULL)
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{
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if (only_digit)
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wp = stpcpy (retval, "iso");
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else
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wp = retval;
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for (cnt = 0; cnt < name_len; ++cnt)
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if (isalpha ((unsigned char) codeset[cnt]))
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*wp++ = tolower ((unsigned char) codeset[cnt]);
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else if (isdigit ((unsigned char) codeset[cnt]))
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*wp++ = codeset[cnt];
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*wp = '\0';
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}
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return (const char *) retval;
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}
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/* @@ begin of epilog @@ */
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/* We don't want libintl.a to depend on any other library. So we
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avoid the non-standard function stpcpy. In GNU C Library this
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function is available, though. Also allow the symbol HAVE_STPCPY
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to be defined. */
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#if !_LIBC && !HAVE_STPCPY
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static char *
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stpcpy (char *dest, const char *src)
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{
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while ((*dest++ = *src++) != '\0')
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/* Do nothing. */ ;
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return dest - 1;
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}
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#endif
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