diff options
Diffstat (limited to 'src/journal/compress.c')
| -rw-r--r-- | src/journal/compress.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/src/journal/compress.c b/src/journal/compress.c deleted file mode 100644 index ff906581..00000000 --- a/src/journal/compress.c +++ /dev/null @@ -1,208 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd 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. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <assert.h> -#include <stdlib.h> -#include <string.h> -#include <lzma.h> - -#include "compress.h" - -bool compress_blob(const void *src, uint64_t src_size, void *dst, uint64_t *dst_size) { - lzma_stream s = LZMA_STREAM_INIT; - lzma_ret ret; - bool b = false; - - assert(src); - assert(src_size > 0); - assert(dst); - assert(dst_size); - - /* Returns false if we couldn't compress the data or the - * compressed result is longer than the original */ - - ret = lzma_easy_encoder(&s, LZMA_PRESET_DEFAULT, LZMA_CHECK_NONE); - if (ret != LZMA_OK) - return false; - - s.next_in = src; - s.avail_in = src_size; - s.next_out = dst; - s.avail_out = src_size; - - /* Does it fit? */ - if (lzma_code(&s, LZMA_FINISH) != LZMA_STREAM_END) - goto fail; - - /* Is it actually shorter? */ - if (s.avail_out == 0) - goto fail; - - *dst_size = src_size - s.avail_out; - b = true; - -fail: - lzma_end(&s); - - return b; -} - -bool uncompress_blob(const void *src, uint64_t src_size, - void **dst, uint64_t *dst_alloc_size, uint64_t* dst_size) { - - lzma_stream s = LZMA_STREAM_INIT; - lzma_ret ret; - bool b = false; - - assert(src); - assert(src_size > 0); - assert(dst); - assert(dst_alloc_size); - assert(dst_size); - assert(*dst_alloc_size == 0 || *dst); - - ret = lzma_stream_decoder(&s, UINT64_MAX, 0); - if (ret != LZMA_OK) - return false; - - if (*dst_alloc_size <= src_size) { - void *p; - - p = realloc(*dst, src_size*2); - if (!p) - return false; - - *dst = p; - *dst_alloc_size = src_size*2; - } - - s.next_in = src; - s.avail_in = src_size; - - s.next_out = *dst; - s.avail_out = *dst_alloc_size; - - for (;;) { - void *p; - - ret = lzma_code(&s, LZMA_FINISH); - - if (ret == LZMA_STREAM_END) - break; - - if (ret != LZMA_OK) - goto fail; - - p = realloc(*dst, *dst_alloc_size*2); - if (!p) - goto fail; - - s.next_out = (uint8_t*) p + ((uint8_t*) s.next_out - (uint8_t*) *dst); - s.avail_out += *dst_alloc_size; - - *dst = p; - *dst_alloc_size *= 2; - } - - *dst_size = *dst_alloc_size - s.avail_out; - b = true; - -fail: - lzma_end(&s); - - return b; -} - -bool uncompress_startswith(const void *src, uint64_t src_size, - void **buffer, uint64_t *buffer_size, - const void *prefix, uint64_t prefix_len, - uint8_t extra) { - - lzma_stream s = LZMA_STREAM_INIT; - lzma_ret ret; - bool b = false; - - /* Checks whether the uncompressed blob starts with the - * mentioned prefix. The byte extra needs to follow the - * prefix */ - - assert(src); - assert(src_size > 0); - assert(buffer); - assert(buffer_size); - assert(prefix); - assert(*buffer_size == 0 || *buffer); - - ret = lzma_stream_decoder(&s, UINT64_MAX, 0); - if (ret != LZMA_OK) - return false; - - if (*buffer_size <= prefix_len) { - void *p; - - p = realloc(*buffer, prefix_len*2); - if (!p) - return false; - - *buffer = p; - *buffer_size = prefix_len*2; - } - - s.next_in = src; - s.avail_in = src_size; - - s.next_out = *buffer; - s.avail_out = *buffer_size; - - for (;;) { - void *p; - - ret = lzma_code(&s, LZMA_FINISH); - - if (ret != LZMA_STREAM_END && ret != LZMA_OK) - goto fail; - - if ((*buffer_size - s.avail_out > prefix_len) && - memcmp(*buffer, prefix, prefix_len) == 0 && - ((const uint8_t*) *buffer)[prefix_len] == extra) - break; - - if (ret == LZMA_STREAM_END) - goto fail; - - p = realloc(*buffer, *buffer_size*2); - if (!p) - goto fail; - - s.next_out = (uint8_t*) p + ((uint8_t*) s.next_out - (uint8_t*) *buffer); - s.avail_out += *buffer_size; - - *buffer = p; - *buffer_size *= 2; - } - - b = true; - -fail: - lzma_end(&s); - - return b; -} |