doc/examples/04_compress_easy_mt.c \
doc/examples/Makefile
-examplesolddir = $(docdir)/examples_old
-dist_examplesold_DATA = \
- doc/examples_old/xz_pipe_comp.c \
- doc/examples_old/xz_pipe_decomp.c
-
# Install the Doxygen generated documentation if they were built.
install-data-local:
if test -d "$(srcdir)/doc/api" ; then \
+++ /dev/null
-/*
- * xz_pipe_comp.c
- * A simple example of pipe-only xz compressor implementation.
- * version: 2010-07-12 - by Daniel Mealha Cabrita
- * Not copyrighted -- provided to the public domain.
- *
- * Compiling:
- * Link with liblzma. GCC example:
- * $ gcc -llzma xz_pipe_comp.c -o xz_pipe_comp
- *
- * Usage example:
- * $ cat some_file | ./xz_pipe_comp > some_file.xz
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <lzma.h>
-
-
-/* COMPRESSION SETTINGS */
-
-/* analogous to xz CLI options: -0 to -9 */
-#define COMPRESSION_LEVEL 6
-
-/* boolean setting, analogous to xz CLI option: -e */
-#define COMPRESSION_EXTREME true
-
-/* see: /usr/include/lzma/check.h LZMA_CHECK_* */
-#define INTEGRITY_CHECK LZMA_CHECK_CRC64
-
-
-/* read/write buffer sizes */
-#define IN_BUF_MAX 4096
-#define OUT_BUF_MAX 4096
-
-/* error codes */
-#define RET_OK 0
-#define RET_ERROR_INIT 1
-#define RET_ERROR_INPUT 2
-#define RET_ERROR_OUTPUT 3
-#define RET_ERROR_COMPRESSION 4
-
-
-/* note: in_file and out_file must be open already */
-int xz_compress (FILE *in_file, FILE *out_file)
-{
- uint32_t preset = COMPRESSION_LEVEL | (COMPRESSION_EXTREME ? LZMA_PRESET_EXTREME : 0);
- lzma_check check = INTEGRITY_CHECK;
- lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
- uint8_t in_buf [IN_BUF_MAX];
- uint8_t out_buf [OUT_BUF_MAX];
- size_t in_len; /* length of useful data in in_buf */
- size_t out_len; /* length of useful data in out_buf */
- bool in_finished = false;
- bool out_finished = false;
- lzma_action action;
- lzma_ret ret_xz;
- int ret;
-
- ret = RET_OK;
-
- /* initialize xz encoder */
- ret_xz = lzma_easy_encoder (&strm, preset, check);
- if (ret_xz != LZMA_OK) {
- fprintf (stderr, "lzma_easy_encoder error: %d\n", (int) ret_xz);
- return RET_ERROR_INIT;
- }
-
- while ((! in_finished) && (! out_finished)) {
- /* read incoming data */
- in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
-
- if (feof (in_file)) {
- in_finished = true;
- }
- if (ferror (in_file)) {
- in_finished = true;
- ret = RET_ERROR_INPUT;
- }
-
- strm.next_in = in_buf;
- strm.avail_in = in_len;
-
- /* if no more data from in_buf, flushes the
- internal xz buffers and closes the xz data
- with LZMA_FINISH */
- action = in_finished ? LZMA_FINISH : LZMA_RUN;
-
- /* loop until there's no pending compressed output */
- do {
- /* out_buf is clean at this point */
- strm.next_out = out_buf;
- strm.avail_out = OUT_BUF_MAX;
-
- /* compress data */
- ret_xz = lzma_code (&strm, action);
-
- if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
- fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
- out_finished = true;
- ret = RET_ERROR_COMPRESSION;
- } else {
- /* write compressed data */
- out_len = OUT_BUF_MAX - strm.avail_out;
- fwrite (out_buf, 1, out_len, out_file);
- if (ferror (out_file)) {
- out_finished = true;
- ret = RET_ERROR_OUTPUT;
- }
- }
- } while (strm.avail_out == 0);
- }
-
- lzma_end (&strm);
- return ret;
-}
-
-int main ()
-{
- int ret;
-
- ret = xz_compress (stdin, stdout);
- return ret;
-}
-
+++ /dev/null
-/*
- * xz_pipe_decomp.c
- * A simple example of pipe-only xz decompressor implementation.
- * version: 2012-06-14 - by Daniel Mealha Cabrita
- * Not copyrighted -- provided to the public domain.
- *
- * Compiling:
- * Link with liblzma. GCC example:
- * $ gcc -llzma xz_pipe_decomp.c -o xz_pipe_decomp
- *
- * Usage example:
- * $ cat some_file.xz | ./xz_pipe_decomp > some_file
- */
-
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <lzma.h>
-
-
-/* read/write buffer sizes */
-#define IN_BUF_MAX 4096
-#define OUT_BUF_MAX 4096
-
-/* error codes */
-#define RET_OK 0
-#define RET_ERROR_INIT 1
-#define RET_ERROR_INPUT 2
-#define RET_ERROR_OUTPUT 3
-#define RET_ERROR_DECOMPRESSION 4
-
-
-/* note: in_file and out_file must be open already */
-int xz_decompress (FILE *in_file, FILE *out_file)
-{
- lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
- const uint32_t flags = LZMA_TELL_UNSUPPORTED_CHECK | LZMA_CONCATENATED;
- const uint64_t memory_limit = UINT64_MAX; /* no memory limit */
- uint8_t in_buf [IN_BUF_MAX];
- uint8_t out_buf [OUT_BUF_MAX];
- size_t in_len; /* length of useful data in in_buf */
- size_t out_len; /* length of useful data in out_buf */
- bool in_finished = false;
- bool out_finished = false;
- lzma_action action;
- lzma_ret ret_xz;
- int ret;
-
- ret = RET_OK;
-
- /* initialize xz decoder */
- ret_xz = lzma_stream_decoder (&strm, memory_limit, flags);
- if (ret_xz != LZMA_OK) {
- fprintf (stderr, "lzma_stream_decoder error: %d\n", (int) ret_xz);
- return RET_ERROR_INIT;
- }
-
- while ((! in_finished) && (! out_finished)) {
- /* read incoming data */
- in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
-
- if (feof (in_file)) {
- in_finished = true;
- }
- if (ferror (in_file)) {
- in_finished = true;
- ret = RET_ERROR_INPUT;
- }
-
- strm.next_in = in_buf;
- strm.avail_in = in_len;
-
- /* if no more data from in_buf, flushes the
- internal xz buffers and closes the decompressed data
- with LZMA_FINISH */
- action = in_finished ? LZMA_FINISH : LZMA_RUN;
-
- /* loop until there's no pending decompressed output */
- do {
- /* out_buf is clean at this point */
- strm.next_out = out_buf;
- strm.avail_out = OUT_BUF_MAX;
-
- /* decompress data */
- ret_xz = lzma_code (&strm, action);
-
- if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
- fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
- out_finished = true;
- ret = RET_ERROR_DECOMPRESSION;
- } else {
- /* write decompressed data */
- out_len = OUT_BUF_MAX - strm.avail_out;
- fwrite (out_buf, 1, out_len, out_file);
- if (ferror (out_file)) {
- out_finished = true;
- ret = RET_ERROR_OUTPUT;
- }
- }
- } while (strm.avail_out == 0);
- }
-
- /* Bug fix (2012-06-14): If no errors were detected, check
- that the last lzma_code() call returned LZMA_STREAM_END.
- If not, the file is probably truncated. */
- if ((ret == RET_OK) && (ret_xz != LZMA_STREAM_END)) {
- fprintf (stderr, "Input truncated or corrupt\n");
- ret = RET_ERROR_DECOMPRESSION;
- }
-
- lzma_end (&strm);
- return ret;
-}
-
-int main ()
-{
- int ret;
-
- ret = xz_decompress (stdin, stdout);
- return ret;
-}
-
projects / thirdparty / xz.git / commitdiff
