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zip.c
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410 lines (347 loc) · 12.8 KB
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/* mlbr - extract .lbr archives and decompress Squeeze, Crunch (v1 & v2)
* and Cr-Lzh(v1 & v2) files.
* Comments and date stamps are supported as is conversion to .zip file
* Copyright (C) - 2020-2023 Mark Ogden
*
* zip.c - support for zip file creation
*
* NOTE: Elements of the code have been derived from public shared
* source code and documentation.
* The source files note the owning copyright holders where known
*
*
* 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 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
* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* - From https://github.com/kuba--/zip
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org/>
*/
#define __STDC_WANT_LIB_EXT1__ 1
#include <errno.h>
#include <sys/stat.h>
#include <time.h>
#if defined(_WIN32) || defined(__WIN32__) || defined(_MSC_VER) || defined(__MINGW32__)
/* Win32, DOS, MSVC, MSVS */
#include <direct.h>
#define MKDIR(DIRNAME) _mkdir(DIRNAME)
#define STRCLONE(STR) ((STR) ? _strdup(STR) : NULL)
#define HAS_DEVICE(P) \
((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) && (P)[1] == ':')
#define FILESYSTEM_PREFIX_LEN(P) (HAS_DEVICE(P) ? 2 : 0)
#else
#include <unistd.h>
#define MKDIR(DIRNAME) mkdir(DIRNAME, 0755)
#define STRCLONE(STR) ((STR) ? strdup(STR) : NULL)
#endif
#include "miniz.h"
#include "zip.h"
#ifndef HAS_DEVICE
#define HAS_DEVICE(P) 0
#endif
#ifndef FILESYSTEM_PREFIX_LEN
#define FILESYSTEM_PREFIX_LEN(P) 0
#endif
#ifndef ISSLASH
#define ISSLASH(C) ((C) == '/' || (C) == '\\')
#endif
#define CLEANUP(ptr) \
do { \
if (ptr) { \
free((void *)ptr); \
ptr = NULL; \
} \
} while (0)
static char *strrpl(const char *str, size_t n, char oldchar, char newchar) {
char c;
size_t i;
char *rpl = (char *)calloc((1 + n), sizeof(char));
char *begin = rpl;
if (!rpl) {
return NULL;
}
for (i = 0; (i < n) && (c = *str++); ++i) {
if (c == oldchar) {
c = newchar;
}
*rpl++ = c;
}
return begin;
}
struct zip_entry_t {
int index;
char *name;
mz_uint64 uncomp_size;
mz_uint64 comp_size;
mz_uint32 uncomp_crc32;
mz_uint64 offset;
mz_uint8 header[MZ_ZIP_LOCAL_DIR_HEADER_SIZE];
mz_uint64 header_offset;
mz_uint16 method;
mz_zip_writer_add_state state;
tdefl_compressor comp;
mz_uint32 external_attr;
time_t m_time;
};
struct zip_t {
mz_zip_archive archive;
mz_uint level;
struct zip_entry_t entry;
};
struct zip_t *zip_open(const char *zipname, int level, char mode) {
struct zip_t *zip = NULL;
if (!zipname || strlen(zipname) < 1) {
// zip_t archive name is empty or NULL
goto cleanup;
}
if (level < 0)
level = MZ_DEFAULT_LEVEL;
if ((level & 0xF) > MZ_UBER_COMPRESSION) {
// Wrong compression level
goto cleanup;
}
zip = (struct zip_t *)calloc((size_t)1, sizeof(struct zip_t));
if (!zip)
goto cleanup;
zip->level = (mz_uint)level;
switch (mode) {
case 'w':
// Create a new archive.
if (!mz_zip_writer_init_file(&(zip->archive), zipname, 0)) {
// Cannot initialize zip_archive writer
goto cleanup;
}
break;
default:
goto cleanup;
}
return zip;
cleanup:
CLEANUP(zip);
return NULL;
}
void zip_close(struct zip_t *zip) {
if (zip) {
// Always finalize, even if adding failed for some reason, so we have a
// valid central directory.
mz_zip_writer_finalize_archive(&(zip->archive));
mz_zip_writer_end(&(zip->archive));
CLEANUP(zip);
}
}
int zip_entry_open(struct zip_t *zip, const char *entryname) {
size_t entrylen = 0;
mz_zip_archive *pzip = NULL;
mz_uint num_alignment_padding_bytes, level;
if (!zip || !entryname) {
return -1;
}
entrylen = strlen(entryname);
if (entrylen < 1) {
return -1;
}
/*
.ZIP File Format Specification Version: 6.3.3
4.4.17.1 The name of the file, with optional relative path.
The path stored MUST not contain a drive or
device letter, or a leading slash. All slashes
MUST be forward slashes '/' as opposed to
backwards slashes '\' for compatibility with Amiga
and UNIX file systems etc. If input came from standard
input, there is no file name field.
*/
zip->entry.name = strrpl(entryname, entrylen, '\\', '/');
if (!zip->entry.name) {
// Cannot parse zip entry name
return -1;
}
pzip = &(zip->archive);
zip->entry.index = (int)zip->archive.m_total_files;
zip->entry.comp_size = 0;
zip->entry.uncomp_size = 0;
zip->entry.uncomp_crc32 = MZ_CRC32_INIT;
zip->entry.offset = zip->archive.m_archive_size;
zip->entry.header_offset = zip->archive.m_archive_size;
memset(zip->entry.header, 0, MZ_ZIP_LOCAL_DIR_HEADER_SIZE * sizeof(mz_uint8));
zip->entry.method = 0;
// UNIX or APPLE
#if MZ_PLATFORM == 3 || MZ_PLATFORM == 19
// regular file with rw-r--r-- persmissions
zip->entry.external_attr = (mz_uint32)(0100644) << 16;
#else
zip->entry.external_attr = 0;
#endif
num_alignment_padding_bytes = mz_zip_writer_compute_padding_needed_for_file_alignment(pzip);
if (!pzip->m_pState || (pzip->m_zip_mode != MZ_ZIP_MODE_WRITING)) {
// Wrong zip mode
goto cleanup;
}
if (zip->level & MZ_ZIP_FLAG_COMPRESSED_DATA) {
// Wrong zip compression level
goto cleanup;
}
// no zip64 support yet
if ((pzip->m_total_files == 0xFFFF) ||
((pzip->m_archive_size + num_alignment_padding_bytes + MZ_ZIP_LOCAL_DIR_HEADER_SIZE +
MZ_ZIP_CENTRAL_DIR_HEADER_SIZE + entrylen) > 0xFFFFFFFF)) {
// No zip64 support yet
goto cleanup;
}
if (!mz_zip_writer_write_zeros(pzip, zip->entry.offset,
num_alignment_padding_bytes + sizeof(zip->entry.header))) {
// Cannot memset zip entry header
goto cleanup;
}
zip->entry.header_offset += num_alignment_padding_bytes;
if (pzip->m_file_offset_alignment) {
MZ_ASSERT((zip->entry.header_offset & (pzip->m_file_offset_alignment - 1)) == 0);
}
zip->entry.offset += num_alignment_padding_bytes + sizeof(zip->entry.header);
if (pzip->m_pWrite(pzip->m_pIO_opaque, zip->entry.offset, zip->entry.name, entrylen) !=
entrylen) {
// Cannot write data to zip entry
goto cleanup;
}
zip->entry.offset += entrylen;
level = zip->level & 0xF;
if (level) {
zip->entry.state.m_pZip = pzip;
zip->entry.state.m_cur_archive_file_ofs = zip->entry.offset;
zip->entry.state.m_comp_size = 0;
if (tdefl_init(&(zip->entry.comp), mz_zip_writer_add_put_buf_callback, &(zip->entry.state),
(int)tdefl_create_comp_flags_from_zip_params(
(int)level, -15, MZ_DEFAULT_STRATEGY)) != TDEFL_STATUS_OKAY) {
// Cannot initialize the zip compressor
goto cleanup;
}
}
zip->entry.m_time = time(NULL);
return 0;
cleanup:
CLEANUP(zip->entry.name);
return -1;
}
int zip_entry_close(struct zip_t *zip, time_t m_time) {
mz_zip_archive *pzip = NULL;
mz_uint level;
tdefl_status done;
mz_uint16 entrylen;
mz_uint16 dos_time, dos_date;
int status = -1;
if (!zip) {
// zip_t handler is not initialized
goto cleanup;
}
pzip = &(zip->archive);
if (pzip->m_zip_mode == MZ_ZIP_MODE_READING) {
status = 0;
goto cleanup;
}
level = zip->level & 0xF;
if (level) {
done = tdefl_compress_buffer(&(zip->entry.comp), "", 0, TDEFL_FINISH);
if (done != TDEFL_STATUS_DONE && done != TDEFL_STATUS_OKAY) {
// Cannot flush compressed buffer
goto cleanup;
}
zip->entry.comp_size = zip->entry.state.m_comp_size;
zip->entry.offset = zip->entry.state.m_cur_archive_file_ofs;
zip->entry.method = MZ_DEFLATED;
}
entrylen = (mz_uint16)strlen(zip->entry.name);
// no zip64 support yet
if ((zip->entry.comp_size > 0xFFFFFFFF) || (zip->entry.offset > 0xFFFFFFFF)) {
// No zip64 support, yet
goto cleanup;
}
if (m_time)
zip->entry.m_time = m_time;
mz_zip_time_t_to_dos_time(zip->entry.m_time, &dos_time, &dos_date);
if (!mz_zip_writer_create_local_dir_header(
pzip, zip->entry.header, entrylen, 0, zip->entry.uncomp_size, zip->entry.comp_size,
zip->entry.uncomp_crc32, zip->entry.method, 0, dos_time, dos_date)) {
// Cannot create zip entry header
goto cleanup;
}
if (pzip->m_pWrite(pzip->m_pIO_opaque, zip->entry.header_offset, zip->entry.header,
sizeof(zip->entry.header)) != sizeof(zip->entry.header)) {
// Cannot write zip entry header
goto cleanup;
}
if (!mz_zip_writer_add_to_central_dir(
pzip, zip->entry.name, entrylen, NULL, 0, "", 0, zip->entry.uncomp_size,
zip->entry.comp_size, zip->entry.uncomp_crc32, zip->entry.method, 0, dos_time, dos_date,
zip->entry.header_offset, zip->entry.external_attr)) {
// Cannot write to zip central dir
goto cleanup;
}
pzip->m_total_files++;
pzip->m_archive_size = zip->entry.offset;
status = 0;
cleanup:
if (zip) {
zip->entry.m_time = 0;
CLEANUP(zip->entry.name);
}
return status;
}
int zip_entry_write(struct zip_t *zip, const void *buf, size_t bufsize) {
mz_uint level;
mz_zip_archive *pzip = NULL;
tdefl_status status;
if (!zip) {
// zip_t handler is not initialized
return -1;
}
pzip = &(zip->archive);
if (buf && bufsize > 0) {
zip->entry.uncomp_size += bufsize;
zip->entry.uncomp_crc32 =
(mz_uint32)mz_crc32(zip->entry.uncomp_crc32, (const mz_uint8 *)buf, bufsize);
level = zip->level & 0xF;
if (!level) {
if ((pzip->m_pWrite(pzip->m_pIO_opaque, zip->entry.offset, buf, bufsize) != bufsize)) {
// Cannot write buffer
return -1;
}
zip->entry.offset += bufsize;
zip->entry.comp_size += bufsize;
} else {
status = tdefl_compress_buffer(&(zip->entry.comp), buf, bufsize, TDEFL_NO_FLUSH);
if (status != TDEFL_STATUS_DONE && status != TDEFL_STATUS_OKAY) {
// Cannot compress buffer
return -1;
}
}
}
return 0;
}