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Build encoder separately

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This commit is contained in:
Dave Vasilevsky 2009-12-19 23:19:55 -05:00
parent 59b14a5dbf
commit 961c04d778
1 changed files with 22 additions and 8 deletions
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30
xz.c
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@ -3,29 +3,31 @@
#include "lzma.h"
#define CHUNK (1024 * 1024)
lzma_ret setup_encoder(lzma_stream *stream);
int main(void) {
lzma_stream stream = LZMA_STREAM_INIT;
size_t chunk = 1024 * 1024;
lzma_ret err = lzma_easy_encoder(&stream, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC32);
lzma_stream stream = LZMA_STREAM_INIT;
lzma_ret err = setup_encoder(&stream);
if (LZMA_OK != err) {
fprintf(stderr, "Can't initialize encoder, error #%d.\n", err);
exit(1);
}
uint8_t inbuf[CHUNK], outbuf[CHUNK];
uint8_t inbuf[chunk], outbuf[chunk];
stream.avail_in = 0;
size_t io;
do {
stream.next_out = outbuf;
stream.avail_out = CHUNK;
stream.avail_out = chunk;
lzma_action action;
if (stream.avail_in == 0) {
io = fread(inbuf, 1, CHUNK, stdin);
if (ferror(stdin) || (!feof(stdin) && CHUNK != io)) {
io = fread(inbuf, 1, chunk, stdin);
if (ferror(stdin) || (!feof(stdin) && chunk != io)) {
fprintf(stderr, "Read error\n");
exit(1);
}
@ -40,7 +42,7 @@ int main(void) {
exit(1);
}
size_t write_bytes = CHUNK - stream.avail_out;
size_t write_bytes = chunk - stream.avail_out;
io = fwrite(outbuf, 1, write_bytes, stdout);
if (io != write_bytes) {
fprintf(stderr, "Write error\n");
@ -50,3 +52,15 @@ int main(void) {
return 0;
}
lzma_ret setup_encoder(lzma_stream *stream) {
lzma_options_lzma *opts = malloc(sizeof(lzma_options_lzma));
lzma_lzma_preset(opts, LZMA_PRESET_DEFAULT);
lzma_filter *filters = malloc(2 * sizeof(lzma_filter));
filters[0].id = LZMA_FILTER_LZMA2;
filters[0].options = opts;
filters[1].id = LZMA_VLI_UNKNOWN;
return lzma_stream_encoder(stream, filters, LZMA_CHECK_CRC32);
}