[PATCH 02/11] Use new compress helpers in git files

[Marco Costalba <mcostalba@gmail.com>]

These are the 'easy' ones, where a signgle step
compression is requested so that we can use only
one call to compress_all()

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---
 archive-zip.c          |   28 +++-------------------------
 builtin-pack-objects.c |   19 +++----------------
 diff.c                 |   22 +++++-----------------
 index-pack.c           |   20 +++-----------------
 4 files changed, 14 insertions(+), 75 deletions(-)

diff --git a/archive-zip.c b/archive-zip.c
index 74e30f6..9071b86 100644
--- a/archive-zip.c
+++ b/archive-zip.c
@@ -3,6 +3,7 @@
  */
 #include "cache.h"
 #include "commit.h"
+#include "compress.h"
 #include "blob.h"
 #include "tree.h"
 #include "quote.h"
@@ -97,33 +98,10 @@ static void copy_le32(unsigned char *dest, unsigned int n)
 static void *zlib_deflate(void *data, unsigned long size,
                           unsigned long *compressed_size)
 {
-	z_stream stream;
-	unsigned long maxsize;
-	void *buffer;
-	int result;
-
-	memset(&stream, 0, sizeof(stream));
-	deflateInit(&stream, zlib_compression_level);
-	maxsize = deflateBound(&stream, size);
-	buffer = xmalloc(maxsize);
-
-	stream.next_in = data;
-	stream.avail_in = size;
-	stream.next_out = buffer;
-	stream.avail_out = maxsize;
-
-	do {
-		result = deflate(&stream, Z_FINISH);
-	} while (result == Z_OK);
-
-	if (result != Z_STREAM_END) {
-		free(buffer);
-		return NULL;
-	}
 
-	deflateEnd(&stream);
-	*compressed_size = stream.total_out;
+	unsigned char *buffer = NULL;
 
+	*compressed_size = compress_all(zlib_compression_level, data, size, &buffer);
 	return buffer;
 }
 
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index d3efeff..991a30f 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "compress.h"
 #include "attr.h"
 #include "object.h"
 #include "blob.h"
@@ -409,9 +410,7 @@ static unsigned long write_object(struct sha1file *f,
 				 */
 
 	if (!to_reuse) {
-		z_stream stream;
-		unsigned long maxsize;
-		void *out;
+		unsigned char *out = NULL;
 		if (!usable_delta) {
 			buf = read_sha1_file(entry->idx.sha1, &obj_type, &size);
 			if (!buf)
@@ -432,19 +431,7 @@ static unsigned long write_object(struct sha1file *f,
 				OBJ_OFS_DELTA : OBJ_REF_DELTA;
 		}
 		/* compress the data to store and put compressed length in datalen */
-		memset(&stream, 0, sizeof(stream));
-		deflateInit(&stream, pack_compression_level);
-		maxsize = deflateBound(&stream, size);
-		out = xmalloc(maxsize);
-		/* Compress it */
-		stream.next_in = buf;
-		stream.avail_in = size;
-		stream.next_out = out;
-		stream.avail_out = maxsize;
-		while (deflate(&stream, Z_FINISH) == Z_OK)
-			/* nothing */;
-		deflateEnd(&stream);
-		datalen = stream.total_out;
+		datalen = compress_all(pack_compression_level, buf, size, &out);
 
 		/*
 		 * The object header is a byte of 'type' followed by zero or
diff --git a/diff.c b/diff.c
index d464fe3..9eb9672 100644
--- a/diff.c
+++ b/diff.c
@@ -2,6 +2,7 @@
  * Copyright (C) 2005 Junio C Hamano
  */
 #include "cache.h"
+#include "compress.h"
 #include "quote.h"
 #include "diff.h"
 #include "diffcore.h"
@@ -1037,23 +1038,10 @@ static unsigned char *deflate_it(char *data,
 				 unsigned long size,
 				 unsigned long *result_size)
 {
-	int bound;
-	unsigned char *deflated;
-	z_stream stream;
-
-	memset(&stream, 0, sizeof(stream));
-	deflateInit(&stream, zlib_compression_level);
-	bound = deflateBound(&stream, size);
-	deflated = xmalloc(bound);
-	stream.next_out = deflated;
-	stream.avail_out = bound;
-
-	stream.next_in = (unsigned char *)data;
-	stream.avail_in = size;
-	while (deflate(&stream, Z_FINISH) == Z_OK)
-		; /* nothing */
-	deflateEnd(&stream);
-	*result_size = stream.total_out;
+	unsigned char *deflated = NULL;
+
+	*result_size = compress_all(zlib_compression_level,
+                                   (unsigned char *)data, size, &deflated);
 	return deflated;
 }
 
diff --git a/index-pack.c b/index-pack.c
index 9fd6982..880088e 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "compress.h"
 #include "delta.h"
 #include "pack.h"
 #include "csum-file.h"
@@ -494,24 +495,9 @@ static void parse_pack_objects(unsigned char *sha1)
 
 static int write_compressed(int fd, void *in, unsigned int size, uint32_t *obj_crc)
 {
-	z_stream stream;
-	unsigned long maxsize;
-	void *out;
+	unsigned char *out = NULL;
 
-	memset(&stream, 0, sizeof(stream));
-	deflateInit(&stream, zlib_compression_level);
-	maxsize = deflateBound(&stream, size);
-	out = xmalloc(maxsize);
-
-	/* Compress it */
-	stream.next_in = in;
-	stream.avail_in = size;
-	stream.next_out = out;
-	stream.avail_out = maxsize;
-	while (deflate(&stream, Z_FINISH) == Z_OK);
-	deflateEnd(&stream);
-
-	size = stream.total_out;
+	size = compress_all(zlib_compression_level, in, size, &out);
 	write_or_die(fd, out, size);
 	*obj_crc = crc32(*obj_crc, out, size);
 	free(out);
-- 
1.5.4.rc4.39.g524a