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-rw-r--r--debug/sync_flush.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/debug/sync_flush.c b/debug/sync_flush.c
new file mode 100644
index 0000000..2292333
--- /dev/null
+++ b/debug/sync_flush.c
@@ -0,0 +1,125 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file sync_flush.c
+/// \brief Encode files using LZMA_SYNC_FLUSH
+//
+// Author: Lasse Collin
+//
+// This file has been put into the public domain.
+// You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "sysdefs.h"
+#include "lzma.h"
+#include <stdio.h>
+
+#define CHUNK 64
+
+
+static lzma_stream strm = LZMA_STREAM_INIT;
+static FILE *file_in;
+
+
+static void
+encode(size_t size, lzma_action action)
+{
+ uint8_t in[CHUNK];
+ uint8_t out[CHUNK];
+ lzma_ret ret;
+
+ do {
+ if (strm.avail_in == 0 && size > 0) {
+ const size_t amount = my_min(size, CHUNK);
+ strm.avail_in = fread(in, 1, amount, file_in);
+ strm.next_in = in;
+ size -= amount; // Intentionally not using avail_in.
+ }
+
+ strm.next_out = out;
+ strm.avail_out = CHUNK;
+
+ ret = lzma_code(&strm, size == 0 ? action : LZMA_RUN);
+
+ if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
+ fprintf(stderr, "%s:%u: %s: ret == %d\n",
+ __FILE__, __LINE__, __func__, ret);
+ exit(1);
+ }
+
+ fwrite(out, 1, CHUNK - strm.avail_out, stdout);
+
+ } while (size > 0 || strm.avail_out == 0);
+
+ if ((action == LZMA_RUN && ret != LZMA_OK)
+ || (action != LZMA_RUN && ret != LZMA_STREAM_END)) {
+ fprintf(stderr, "%s:%u: %s: ret == %d\n",
+ __FILE__, __LINE__, __func__, ret);
+ exit(1);
+ }
+}
+
+
+int
+main(int argc, char **argv)
+{
+ file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
+
+ // Config
+ lzma_options_lzma opt_lzma = {
+ .dict_size = 1U << 16,
+ .lc = LZMA_LC_DEFAULT,
+ .lp = LZMA_LP_DEFAULT,
+ .pb = LZMA_PB_DEFAULT,
+ .preset_dict = NULL,
+ .mode = LZMA_MODE_NORMAL,
+ .nice_len = 32,
+ .mf = LZMA_MF_HC3,
+ .depth = 0,
+ };
+
+ lzma_options_delta opt_delta = {
+ .dist = 16
+ };
+
+ lzma_filter filters[LZMA_FILTERS_MAX + 1];
+ filters[0].id = LZMA_FILTER_LZMA2;
+ filters[0].options = &opt_lzma;
+ filters[1].id = LZMA_VLI_UNKNOWN;
+
+ // Init
+ if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) {
+ fprintf(stderr, "init failed\n");
+ exit(1);
+ }
+
+ // Encoding
+ encode(0, LZMA_SYNC_FLUSH);
+ encode(6, LZMA_SYNC_FLUSH);
+ encode(0, LZMA_SYNC_FLUSH);
+ encode(7, LZMA_SYNC_FLUSH);
+ encode(0, LZMA_SYNC_FLUSH);
+ encode(0, LZMA_FINISH);
+
+/*
+ encode(53, LZMA_SYNC_FLUSH);
+ opt_lzma.lc = 2;
+ opt_lzma.lp = 1;
+ opt_lzma.pb = 0;
+ if (lzma_filters_update(&strm, filters) != LZMA_OK) {
+ fprintf(stderr, "update failed\n");
+ exit(1);
+ }
+ encode(404, LZMA_FINISH);
+*/
+
+ // Clean up
+ lzma_end(&strm);
+
+ return 0;
+
+ // Prevent useless warnings so we don't need to have special CFLAGS
+ // to disable -Werror.
+ (void)opt_lzma;
+ (void)opt_delta;
+}