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authorLasse Collin <lasse.collin@tukaani.org>2024-02-09 17:20:31 +0200
committerLasse Collin <lasse.collin@tukaani.org>2024-02-14 15:23:00 +0200
commiteac2c3c67f9113a225fb6667df862edd30366931 (patch)
tree1bdd6f8e738e78ffacc3e92aeae977431dbd167b /doc/examples_old/xz_pipe_decomp.c
parentTests: Add RISC-V filter support in a few places. (diff)
downloadxz-eac2c3c67f9113a225fb6667df862edd30366931.tar.xz
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.
Diffstat (limited to '')
-rw-r--r--doc/examples_old/xz_pipe_decomp.c123
1 files changed, 0 insertions, 123 deletions
diff --git a/doc/examples_old/xz_pipe_decomp.c b/doc/examples_old/xz_pipe_decomp.c
deleted file mode 100644
index fb5ad895..00000000
--- a/doc/examples_old/xz_pipe_decomp.c
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * 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;
-}
-