fetch: implement fetch.fsck.*

diff --git a/zlib.c b/zlib.c
index 3c63d480c75e9939fb3a047f595b032e9509d681..d594cba3fc9d82d94b9277e886f2bee265e552f6 100644 (file)
--- a/zlib.c
+++ b/zlib.c
@@ -52,9 +52,9 @@ static void zlib_post_call(git_zstream *s)
        bytes_consumed = s->z.next_in - s->next_in;
        bytes_produced = s->z.next_out - s->next_out;
        if (s->z.total_out != s->total_out + bytes_produced)
-               die("BUG: total_out mismatch");
+               BUG("total_out mismatch");
        if (s->z.total_in != s->total_in + bytes_consumed)
-               die("BUG: total_in mismatch");
+               BUG("total_in mismatch");
 
        s->total_out = s->z.total_out;
        s->total_in = s->z.total_in;
@@ -159,6 +159,7 @@ void git_deflate_init(git_zstream *strm, int level)
 {
        int status;
 
+       memset(strm, 0, sizeof(*strm));
        zlib_pre_call(strm);
        status = deflateInit(&strm->z, level);
        zlib_post_call(strm);
@@ -168,15 +169,11 @@ 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;
 
+       memset(strm, 0, sizeof(*strm));
        zlib_pre_call(strm);
        status = deflateInit2(&strm->z, level,
                                  Z_DEFLATED, windowBits,
@@ -188,13 +185,38 @@ void git_deflate_init_gzip(git_zstream *strm, int level)
            strm->z.msg ? strm->z.msg : "no message");
 }
 
-void git_deflate_end(git_zstream *strm)
+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;
 
        zlib_pre_call(strm);
        status = deflateEnd(&strm->z);
        zlib_post_call(strm);
+       return status;
+}
+
+void git_deflate_end(git_zstream *strm)
+{
+       int status = git_deflate_abort(strm);
+
        if (status == Z_OK)
                return;
        error("deflateEnd: %s (%s)", zerr_to_string(status),