index-pack: correct --keep[=<msg>]

diff --git a/zlib.c b/zlib.c
index 2b2c0c780e3fca6217c688298053a01aad724505..61e6df0fdce6dfaf38da7af996d7fe801db8f00c 100644 (file)
--- a/zlib.c
+++ b/zlib.c
@@ -168,13 +168,8 @@ void git_deflate_init(git_zstream *strm, int level)
            strm->z.msg ? strm->z.msg : "no message");
 }
 
-void git_deflate_init_gzip(git_zstream *strm, int level)
+static void do_git_deflate_init(git_zstream *strm, int level, int windowBits)
 {
-       /*
-        * Use default 15 bits, +16 is to generate gzip header/trailer
-        * instead of the zlib wrapper.
-        */
-       const int windowBits = 15 + 16;
        int status;
 
        zlib_pre_call(strm);
@@ -188,6 +183,24 @@ void git_deflate_init_gzip(git_zstream *strm, int level)
            strm->z.msg ? strm->z.msg : "no message");
 }
 
+void git_deflate_init_gzip(git_zstream *strm, int level)
+{
+       /*
+        * Use default 15 bits, +16 is to generate gzip header/trailer
+        * instead of the zlib wrapper.
+        */
+       do_git_deflate_init(strm, level, 15 + 16);
+}
+
+void git_deflate_init_raw(git_zstream *strm, int level)
+{
+       /*
+        * Use default 15 bits, negate the value to get raw compressed
+        * data without zlib header and trailer.
+        */
+       do_git_deflate_init(strm, level, -15);
+}
+
 int git_deflate_abort(git_zstream *strm)
 {
        int status;