diff options
Diffstat (limited to 'util/compress/libdeflate/lib/gzip_decompress.c')
| -rw-r--r-- | util/compress/libdeflate/lib/gzip_decompress.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/util/compress/libdeflate/lib/gzip_decompress.c b/util/compress/libdeflate/lib/gzip_decompress.c deleted file mode 100644 index 1b31d8a8e..000000000 --- a/util/compress/libdeflate/lib/gzip_decompress.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * gzip_decompress.c - decompress with a gzip wrapper - * - * Originally public domain; changes after 2016-09-07 are copyrighted. - * - * Copyright 2016 Eric Biggers - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * 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 OR COPYRIGHT - * HOLDERS 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. - */ - -#include "gzip_constants.h" -#include "unaligned.h" - -#include "libdeflate.h" - -LIBDEFLATEEXPORT enum libdeflate_result LIBDEFLATEAPI -libdeflate_gzip_decompress_ex(struct libdeflate_decompressor *d, - const void *in, size_t in_nbytes, - void *out, size_t out_nbytes_avail, - size_t *actual_in_nbytes_ret, - size_t *actual_out_nbytes_ret) -{ - const u8 *in_next = in; - const u8 * const in_end = in_next + in_nbytes; - u8 flg; - size_t actual_in_nbytes; - size_t actual_out_nbytes; - enum libdeflate_result result; - - if (in_nbytes < GZIP_MIN_OVERHEAD) - return LIBDEFLATE_BAD_DATA; - - /* ID1 */ - if (*in_next++ != GZIP_ID1) - return LIBDEFLATE_BAD_DATA; - /* ID2 */ - if (*in_next++ != GZIP_ID2) - return LIBDEFLATE_BAD_DATA; - /* CM */ - if (*in_next++ != GZIP_CM_DEFLATE) - return LIBDEFLATE_BAD_DATA; - flg = *in_next++; - /* MTIME */ - in_next += 4; - /* XFL */ - in_next += 1; - /* OS */ - in_next += 1; - - if (flg & GZIP_FRESERVED) - return LIBDEFLATE_BAD_DATA; - - /* Extra field */ - if (flg & GZIP_FEXTRA) { - u16 xlen = get_unaligned_le16(in_next); - in_next += 2; - - if (in_end - in_next < (u32)xlen + GZIP_FOOTER_SIZE) - return LIBDEFLATE_BAD_DATA; - - in_next += xlen; - } - - /* Original file name (zero terminated) */ - if (flg & GZIP_FNAME) { - while (*in_next++ != 0 && in_next != in_end) - ; - if (in_end - in_next < GZIP_FOOTER_SIZE) - return LIBDEFLATE_BAD_DATA; - } - - /* File comment (zero terminated) */ - if (flg & GZIP_FCOMMENT) { - while (*in_next++ != 0 && in_next != in_end) - ; - if (in_end - in_next < GZIP_FOOTER_SIZE) - return LIBDEFLATE_BAD_DATA; - } - - /* CRC16 for gzip header */ - if (flg & GZIP_FHCRC) { - in_next += 2; - if (in_end - in_next < GZIP_FOOTER_SIZE) - return LIBDEFLATE_BAD_DATA; - } - - /* Compressed data */ - result = libdeflate_deflate_decompress_ex(d, in_next, - in_end - GZIP_FOOTER_SIZE - in_next, - out, out_nbytes_avail, - &actual_in_nbytes, - actual_out_nbytes_ret); - if (result != LIBDEFLATE_SUCCESS) - return result; - - if (actual_out_nbytes_ret) - actual_out_nbytes = *actual_out_nbytes_ret; - else - actual_out_nbytes = out_nbytes_avail; - - in_next += actual_in_nbytes; - - /* CRC32 */ - if (libdeflate_crc32(0, out, actual_out_nbytes) != - get_unaligned_le32(in_next)) - return LIBDEFLATE_BAD_DATA; - in_next += 4; - - /* ISIZE */ - if ((u32)actual_out_nbytes != get_unaligned_le32(in_next)) - return LIBDEFLATE_BAD_DATA; - in_next += 4; - - if (actual_in_nbytes_ret) - *actual_in_nbytes_ret = in_next - (u8 *)in; - - return LIBDEFLATE_SUCCESS; -} - -LIBDEFLATEEXPORT enum libdeflate_result LIBDEFLATEAPI -libdeflate_gzip_decompress(struct libdeflate_decompressor *d, - const void *in, size_t in_nbytes, - void *out, size_t out_nbytes_avail, - size_t *actual_out_nbytes_ret) -{ - return libdeflate_gzip_decompress_ex(d, in, in_nbytes, - out, out_nbytes_avail, - NULL, actual_out_nbytes_ret); -} |