Merge branch 'np/maint-huge-delta-generation' into maint

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index b4cf8c53e0ebbee65a0e4bc0ac1afd1173d1b8e8..fad76bf7a84a6a103de20732752119d5245e9638 100644 (file)
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -11,7 +11,7 @@
 #include "exec_cmd.h"
 
 static const char index_pack_usage[] =
-"git index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
+"git index-pack [-v] [-o <index-file>] [{ --keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
 
 struct object_entry
 {
@@ -266,26 +266,23 @@ static void unlink_base_data(struct base_data *c)
 
 static void *unpack_entry_data(unsigned long offset, unsigned long size)
 {
+       int status;
        z_stream stream;
        void *buf = xmalloc(size);
 
        memset(&stream, 0, sizeof(stream));
+       git_inflate_init(&stream);
        stream.next_out = buf;
        stream.avail_out = size;
-       stream.next_in = fill(1);
-       stream.avail_in = input_len;
-       git_inflate_init(&stream);
 
-       for (;;) {
-               int ret = git_inflate(&stream, 0);
-               use(input_len - stream.avail_in);
-               if (stream.total_out == size && ret == Z_STREAM_END)
-                       break;
-               if (ret != Z_OK)
-                       bad_object(offset, "inflate returned %d", ret);
+       do {
                stream.next_in = fill(1);
                stream.avail_in = input_len;
-       }
+               status = git_inflate(&stream, 0);
+               use(input_len - stream.avail_in);
+       } while (status == Z_OK);
+       if (stream.total_out != size || status != Z_STREAM_END)
+               bad_object(offset, "inflate returned %d", status);
        git_inflate_end(&stream);
        return buf;
 }
@@ -359,34 +356,38 @@ static void *get_data_from_pack(struct object_entry *obj)
 {
        off_t from = obj[0].idx.offset + obj[0].hdr_size;
        unsigned long len = obj[1].idx.offset - from;
-       unsigned long rdy = 0;
-       unsigned char *src, *data;
+       unsigned char *data, *inbuf;
        z_stream stream;
-       int st;
+       int status;
 
-       src = xmalloc(len);
-       data = src;
-       do {
-               ssize_t n = pread(pack_fd, data + rdy, len - rdy, from + rdy);
-               if (n < 0)
-                       die_errno("cannot pread pack file");
-               if (!n)
-                       die("premature end of pack file, %lu bytes missing",
-                           len - rdy);
-               rdy += n;
-       } while (rdy < len);
        data = xmalloc(obj->size);
+       inbuf = xmalloc((len < 64*1024) ? len : 64*1024);
+
        memset(&stream, 0, sizeof(stream));
+       git_inflate_init(&stream);
        stream.next_out = data;
        stream.avail_out = obj->size;
-       stream.next_in = src;
-       stream.avail_in = len;
-       git_inflate_init(&stream);
-       while ((st = git_inflate(&stream, Z_FINISH)) == Z_OK);
-       git_inflate_end(&stream);
-       if (st != Z_STREAM_END || stream.total_out != obj->size)
+
+       do {
+               ssize_t n = (len < 64*1024) ? len : 64*1024;
+               n = pread(pack_fd, inbuf, n, from);
+               if (n < 0)
+                       die_errno("cannot pread pack file");
+               if (!n)
+                       die("premature end of pack file, %lu bytes missing", len);
+               from += n;
+               len -= n;
+               stream.next_in = inbuf;
+               stream.avail_in = n;
+               status = git_inflate(&stream, 0);
+       } while (len && status == Z_OK && !stream.avail_in);
+
+       /* This has been inflated OK when first encountered, so... */
+       if (status != Z_STREAM_END || stream.total_out != obj->size)
                die("serious inflate inconsistency");
-       free(src);
+
+       git_inflate_end(&stream);
+       free(inbuf);
        return data;
 }
 
@@ -668,25 +669,25 @@ static void parse_pack_objects(unsigned char *sha1)
 static int write_compressed(struct sha1file *f, void *in, unsigned int size)
 {
        z_stream stream;
-       unsigned long maxsize;
-       void *out;
+       int status;
+       unsigned char outbuf[4096];
 
        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);
 
+       do {
+               stream.next_out = outbuf;
+               stream.avail_out = sizeof(outbuf);
+               status = deflate(&stream, Z_FINISH);
+               sha1write(f, outbuf, sizeof(outbuf) - stream.avail_out);
+       } while (status == Z_OK);
+
+       if (status != Z_STREAM_END)
+               die("unable to deflate appended object (%d)", status);
        size = stream.total_out;
-       sha1write(f, out, size);
-       free(out);
+       deflateEnd(&stream);
        return size;
 }
 
@@ -883,6 +884,8 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
        if (argc == 2 && !strcmp(argv[1], "-h"))
                usage(index_pack_usage);
 
+       read_replace_refs = 0;
+
        /*
         * We wish to read the repository's config file if any, and
         * for that it is necessary to call setup_git_directory_gently().