Update XZ Utils to 5.0.4 (third_party)

doc/examples/xz_pipe_comp.c

Index: doc/examples/xz_pipe_comp.c
===================================================================
--- doc/examples/xz_pipe_comp.c	(revision 87706)
+++ doc/examples/xz_pipe_comp.c	(working copy)
@@ -1,127 +0,0 @@
-/*
- * 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;
-}
-