mirror of https://git.tukaani.org/xz.git
Doc: Remove doc/examples_old.
It was good to keep these around in parallel with the newer examples but I think it's OK to remove the old ones at this point.
This commit is contained in:
Lasse Collin
parent
89ea1a22f4
commit
eac2c3c67f
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@ -40,11 +40,6 @@ dist_examples_DATA = \
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doc/examples/04_compress_easy_mt.c \
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doc/examples/Makefile
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examplesolddir = $(docdir)/examples_old
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dist_examplesold_DATA = \
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doc/examples_old/xz_pipe_comp.c \
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doc/examples_old/xz_pipe_decomp.c
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# Install the Doxygen generated documentation if they were built.
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install-data-local:
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if test -d "$(srcdir)/doc/api" ; then \
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@ -1,127 +0,0 @@
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/*
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* xz_pipe_comp.c
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* A simple example of pipe-only xz compressor implementation.
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* version: 2010-07-12 - by Daniel Mealha Cabrita
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* Not copyrighted -- provided to the public domain.
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*
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* Compiling:
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* Link with liblzma. GCC example:
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* $ gcc -llzma xz_pipe_comp.c -o xz_pipe_comp
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*
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* Usage example:
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* $ cat some_file | ./xz_pipe_comp > some_file.xz
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <lzma.h>
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/* COMPRESSION SETTINGS */
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/* analogous to xz CLI options: -0 to -9 */
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#define COMPRESSION_LEVEL 6
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/* boolean setting, analogous to xz CLI option: -e */
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#define COMPRESSION_EXTREME true
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/* see: /usr/include/lzma/check.h LZMA_CHECK_* */
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#define INTEGRITY_CHECK LZMA_CHECK_CRC64
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/* read/write buffer sizes */
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#define IN_BUF_MAX 4096
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#define OUT_BUF_MAX 4096
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/* error codes */
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#define RET_OK 0
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#define RET_ERROR_INIT 1
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#define RET_ERROR_INPUT 2
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#define RET_ERROR_OUTPUT 3
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#define RET_ERROR_COMPRESSION 4
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/* note: in_file and out_file must be open already */
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int xz_compress (FILE *in_file, FILE *out_file)
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{
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uint32_t preset = COMPRESSION_LEVEL | (COMPRESSION_EXTREME ? LZMA_PRESET_EXTREME : 0);
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lzma_check check = INTEGRITY_CHECK;
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lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
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uint8_t in_buf [IN_BUF_MAX];
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uint8_t out_buf [OUT_BUF_MAX];
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size_t in_len; /* length of useful data in in_buf */
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size_t out_len; /* length of useful data in out_buf */
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bool in_finished = false;
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bool out_finished = false;
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lzma_action action;
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lzma_ret ret_xz;
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int ret;
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ret = RET_OK;
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/* initialize xz encoder */
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ret_xz = lzma_easy_encoder (&strm, preset, check);
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if (ret_xz != LZMA_OK) {
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fprintf (stderr, "lzma_easy_encoder error: %d\n", (int) ret_xz);
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return RET_ERROR_INIT;
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}
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while ((! in_finished) && (! out_finished)) {
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/* read incoming data */
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in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
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if (feof (in_file)) {
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in_finished = true;
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}
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if (ferror (in_file)) {
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in_finished = true;
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ret = RET_ERROR_INPUT;
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}
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strm.next_in = in_buf;
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strm.avail_in = in_len;
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/* if no more data from in_buf, flushes the
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internal xz buffers and closes the xz data
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with LZMA_FINISH */
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action = in_finished ? LZMA_FINISH : LZMA_RUN;
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/* loop until there's no pending compressed output */
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do {
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/* out_buf is clean at this point */
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strm.next_out = out_buf;
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strm.avail_out = OUT_BUF_MAX;
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/* compress data */
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ret_xz = lzma_code (&strm, action);
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if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
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fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
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out_finished = true;
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ret = RET_ERROR_COMPRESSION;
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} else {
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/* write compressed data */
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out_len = OUT_BUF_MAX - strm.avail_out;
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fwrite (out_buf, 1, out_len, out_file);
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if (ferror (out_file)) {
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out_finished = true;
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ret = RET_ERROR_OUTPUT;
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}
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}
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} while (strm.avail_out == 0);
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}
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lzma_end (&strm);
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return ret;
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}
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int main ()
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{
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int ret;
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ret = xz_compress (stdin, stdout);
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return ret;
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}
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@ -1,123 +0,0 @@
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/*
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* xz_pipe_decomp.c
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* A simple example of pipe-only xz decompressor implementation.
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* version: 2012-06-14 - by Daniel Mealha Cabrita
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* Not copyrighted -- provided to the public domain.
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*
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* Compiling:
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* Link with liblzma. GCC example:
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* $ gcc -llzma xz_pipe_decomp.c -o xz_pipe_decomp
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*
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* Usage example:
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* $ cat some_file.xz | ./xz_pipe_decomp > some_file
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <lzma.h>
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/* read/write buffer sizes */
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#define IN_BUF_MAX 4096
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#define OUT_BUF_MAX 4096
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/* error codes */
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#define RET_OK 0
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#define RET_ERROR_INIT 1
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#define RET_ERROR_INPUT 2
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#define RET_ERROR_OUTPUT 3
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#define RET_ERROR_DECOMPRESSION 4
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/* note: in_file and out_file must be open already */
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int xz_decompress (FILE *in_file, FILE *out_file)
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{
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lzma_stream strm = LZMA_STREAM_INIT; /* alloc and init lzma_stream struct */
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const uint32_t flags = LZMA_TELL_UNSUPPORTED_CHECK | LZMA_CONCATENATED;
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const uint64_t memory_limit = UINT64_MAX; /* no memory limit */
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uint8_t in_buf [IN_BUF_MAX];
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uint8_t out_buf [OUT_BUF_MAX];
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size_t in_len; /* length of useful data in in_buf */
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size_t out_len; /* length of useful data in out_buf */
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bool in_finished = false;
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bool out_finished = false;
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lzma_action action;
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lzma_ret ret_xz;
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int ret;
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ret = RET_OK;
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/* initialize xz decoder */
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ret_xz = lzma_stream_decoder (&strm, memory_limit, flags);
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if (ret_xz != LZMA_OK) {
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fprintf (stderr, "lzma_stream_decoder error: %d\n", (int) ret_xz);
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return RET_ERROR_INIT;
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}
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while ((! in_finished) && (! out_finished)) {
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/* read incoming data */
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in_len = fread (in_buf, 1, IN_BUF_MAX, in_file);
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if (feof (in_file)) {
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in_finished = true;
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}
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if (ferror (in_file)) {
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in_finished = true;
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ret = RET_ERROR_INPUT;
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}
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strm.next_in = in_buf;
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strm.avail_in = in_len;
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/* if no more data from in_buf, flushes the
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internal xz buffers and closes the decompressed data
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with LZMA_FINISH */
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action = in_finished ? LZMA_FINISH : LZMA_RUN;
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/* loop until there's no pending decompressed output */
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do {
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/* out_buf is clean at this point */
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strm.next_out = out_buf;
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strm.avail_out = OUT_BUF_MAX;
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/* decompress data */
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ret_xz = lzma_code (&strm, action);
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if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
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fprintf (stderr, "lzma_code error: %d\n", (int) ret_xz);
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out_finished = true;
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ret = RET_ERROR_DECOMPRESSION;
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} else {
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/* write decompressed data */
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out_len = OUT_BUF_MAX - strm.avail_out;
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fwrite (out_buf, 1, out_len, out_file);
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if (ferror (out_file)) {
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out_finished = true;
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ret = RET_ERROR_OUTPUT;
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}
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}
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} while (strm.avail_out == 0);
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}
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/* Bug fix (2012-06-14): If no errors were detected, check
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that the last lzma_code() call returned LZMA_STREAM_END.
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If not, the file is probably truncated. */
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if ((ret == RET_OK) && (ret_xz != LZMA_STREAM_END)) {
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fprintf (stderr, "Input truncated or corrupt\n");
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ret = RET_ERROR_DECOMPRESSION;
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}
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lzma_end (&strm);
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return ret;
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}
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int main ()
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{
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int ret;
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ret = xz_decompress (stdin, stdout);
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return ret;
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}
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