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author | Lasse Collin <lasse.collin@tukaani.org> | 2008-11-19 23:52:24 +0200 |
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committer | Lasse Collin <lasse.collin@tukaani.org> | 2008-11-19 23:52:24 +0200 |
commit | 1880a3927b23f265f63b2adb86fbdb81ea09eb06 (patch) | |
tree | 2fe1b65d21f81b28f46eb707378d97f553e99ee1 /src/lzma/suffix.c | |
parent | Oh well, big messy commit again. Some highlights: (diff) | |
download | xz-1880a3927b23f265f63b2adb86fbdb81ea09eb06.tar.xz |
Renamed lzma to xz and lzmadec to xzdec. We create symlinks
lzma, unlzma, and lzcat in "make install" for backwards
compatibility with LZMA Utils 4.32.x; I'm not sure if this
should be the default though.
Diffstat (limited to 'src/lzma/suffix.c')
-rw-r--r-- | src/lzma/suffix.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/src/lzma/suffix.c b/src/lzma/suffix.c deleted file mode 100644 index 0d46855a..00000000 --- a/src/lzma/suffix.c +++ /dev/null @@ -1,213 +0,0 @@ -/////////////////////////////////////////////////////////////////////////////// -// -/// \file suffix.c -/// \brief Checks filename suffix and creates the destination filename -// -// Copyright (C) 2007 Lasse Collin -// -// This program is free software; you can redistribute it and/or -// modify it under the terms of the GNU Lesser General Public -// License as published by the Free Software Foundation; either -// version 2.1 of the License, 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 -// Lesser General Public License for more details. -// -/////////////////////////////////////////////////////////////////////////////// - -#include "private.h" - - -static char *custom_suffix = NULL; - - -struct suffix_pair { - const char *compressed; - const char *uncompressed; -}; - - -/// \brief Checks if src_name has given compressed_suffix -/// -/// \param suffix Filename suffix to look for -/// \param src_name Input filename -/// \param src_len strlen(src_name) -/// -/// \return If src_name has the suffix, src_len - strlen(suffix) is -/// returned. It's always a positive integer. Otherwise zero -/// is returned. -static size_t -test_suffix(const char *suffix, const char *src_name, size_t src_len) -{ - const size_t suffix_len = strlen(suffix); - - // The filename must have at least one character in addition to - // the suffix. src_name may contain path to the filename, so we - // need to check for directory separator too. - if (src_len <= suffix_len || src_name[src_len - suffix_len - 1] == '/') - return 0; - - if (strcmp(suffix, src_name + src_len - suffix_len) == 0) - return src_len - suffix_len; - - return 0; -} - - -/// \brief Removes the filename suffix of the compressed file -/// -/// \return Name of the uncompressed file, or NULL if file has unknown -/// suffix. -static char * -uncompressed_name(const char *src_name, const size_t src_len) -{ - static const struct suffix_pair suffixes[] = { - { ".xz", "" }, - { ".txz", ".tar" }, // .txz abbreviation for .txt.gz is rare. - { ".lzma", "" }, - { ".tlz", ".tar" }, - // { ".gz", "" }, - // { ".tgz", ".tar" }, - }; - - const char *new_suffix = ""; - size_t new_len = 0; - - if (opt_format == FORMAT_RAW) { - // Don't check for known suffixes when --format=raw was used. - if (custom_suffix == NULL) { - message_error(_("%s: With --format=raw, " - "--suffix=.SUF is required unless " - "writing to stdout"), src_name); - return NULL; - } - } else { - for (size_t i = 0; i < ARRAY_SIZE(suffixes); ++i) { - new_len = test_suffix(suffixes[i].compressed, - src_name, src_len); - if (new_len != 0) { - new_suffix = suffixes[i].uncompressed; - break; - } - } - } - - if (new_len == 0 && custom_suffix != NULL) - new_len = test_suffix(custom_suffix, src_name, src_len); - - if (new_len == 0) { - message_warning(_("%s: Filename has an unknown suffix, " - "skipping"), src_name); - return NULL; - } - - const size_t new_suffix_len = strlen(new_suffix); - char *dest_name = xmalloc(new_len + new_suffix_len + 1); - - memcpy(dest_name, src_name, new_len); - memcpy(dest_name + new_len, new_suffix, new_suffix_len); - dest_name[new_len + new_suffix_len] = '\0'; - - return dest_name; -} - - -/// \brief Appends suffix to src_name -/// -/// In contrast to uncompressed_name(), we check only suffixes that are valid -/// for the specified file format. -static char * -compressed_name(const char *src_name, const size_t src_len) -{ - // The order of these must match the order in args.h. - static const struct suffix_pair all_suffixes[][3] = { - { - { ".xz", "" }, - { ".txz", ".tar" }, - { NULL, NULL } - }, { - { ".lzma", "" }, - { ".tlz", ".tar" }, - { NULL, NULL } -/* - }, { - { ".gz", "" }, - { ".tgz", ".tar" }, - { NULL, NULL } -*/ - }, { - // --format=raw requires specifying the suffix - // manually or using stdout. - { NULL, NULL } - } - }; - - // args.c ensures this. - assert(opt_format != FORMAT_AUTO); - - const size_t format = opt_format - 1; - const struct suffix_pair *const suffixes = all_suffixes[format]; - - for (size_t i = 0; suffixes[i].compressed != NULL; ++i) { - if (test_suffix(suffixes[i].compressed, src_name, src_len) - != 0) { - message_warning(_("%s: File already has `%s' " - "suffix, skipping"), src_name, - suffixes[i].compressed); - return NULL; - } - } - - // TODO: Hmm, maybe it would be better to validate this in args.c, - // since the suffix handling when decoding is weird now. - if (opt_format == FORMAT_RAW && custom_suffix == NULL) { - message_error(_("%s: With --format=raw, " - "--suffix=.SUF is required unless " - "writing to stdout"), src_name); - return NULL; - } - - const char *suffix = custom_suffix != NULL - ? custom_suffix : suffixes[0].compressed; - const size_t suffix_len = strlen(suffix); - - char *dest_name = xmalloc(src_len + suffix_len + 1); - - memcpy(dest_name, src_name, src_len); - memcpy(dest_name + src_len, suffix, suffix_len); - dest_name[src_len + suffix_len] = '\0'; - - return dest_name; -} - - -extern char * -suffix_get_dest_name(const char *src_name) -{ - assert(src_name != NULL); - - // Length of the name is needed in all cases to locate the end of - // the string to compare the suffix, so calculate the length here. - const size_t src_len = strlen(src_name); - - return opt_mode == MODE_COMPRESS - ? compressed_name(src_name, src_len) - : uncompressed_name(src_name, src_len); -} - - -extern void -suffix_set(const char *suffix) -{ - // Empty suffix and suffixes having a slash are rejected. Such - // suffixes would break things later. - if (suffix[0] == '\0' || strchr(suffix, '/') != NULL) - message_fatal(_("%s: Invalid filename suffix"), optarg); - - // Replace the old custom_suffix (if any) with the new suffix. - free(custom_suffix); - custom_suffix = xstrdup(suffix); - return; -} |