archive: fix subst file generation

diff --git a/sha1_file.c b/sha1_file.c
index b219d4d5f246eef13c3fe22cd39497b621d7cc4b..aea10961fdd9ba6e14514701a49bd69cb594a695 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -14,6 +14,7 @@
 #include "tag.h"
 #include "tree.h"
 #include "refs.h"
+#include "strbuf.h"
 
 #ifndef O_NOATIME
 #if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
@@ -1570,6 +1571,10 @@ static void *unpack_delta_entry(struct packed_git *p,
                    (uintmax_t)base_offset, p->pack_name);
 
        delta_data = unpack_compressed_entry(p, w_curs, curpos, delta_size);
+       if (!delta_data)
+               die("failed to unpack compressed delta"
+                   " at %"PRIuMAX" from %s",
+                   (uintmax_t)curpos, p->pack_name);
        result = patch_delta(base, base_size,
                             delta_data, delta_size,
                             sizep);
@@ -2298,68 +2303,25 @@ int has_sha1_file(const unsigned char *sha1)
        return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
-/*
- * reads from fd as long as possible into a supplied buffer of size bytes.
- * If necessary the buffer's size is increased using realloc()
- *
- * returns 0 if anything went fine and -1 otherwise
- *
- * The buffer is always NUL-terminated, not including it in returned size.
- *
- * NOTE: both buf and size may change, but even when -1 is returned
- * you still have to free() it yourself.
- */
-int read_fd(int fd, char **return_buf, unsigned long *return_size)
-{
-       char *buf = *return_buf;
-       unsigned long size = *return_size;
-       ssize_t iret;
-       unsigned long off = 0;
-
-       if (!buf || size <= 1) {
-               size = 1024;
-               buf = xrealloc(buf, size);
-       }
-
-       do {
-               iret = xread(fd, buf + off, (size - 1) - off);
-               if (iret > 0) {
-                       off += iret;
-                       if (off == size - 1) {
-                               size = alloc_nr(size);
-                               buf = xrealloc(buf, size);
-                       }
-               }
-       } while (iret > 0);
-
-       buf[off] = '\0';
-
-       *return_buf = buf;
-       *return_size = off;
-
-       if (iret < 0)
-               return -1;
-       return 0;
-}
-
 int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
 {
-       unsigned long size = 4096;
-       char *buf = xmalloc(size);
+       struct strbuf buf;
        int ret;
 
-       if (read_fd(fd, &buf, &size)) {
-               free(buf);
+       strbuf_init(&buf, 0);
+       if (strbuf_read(&buf, fd, 4096) < 0) {
+               strbuf_release(&buf);
                return -1;
        }
 
        if (!type)
                type = blob_type;
        if (write_object)
-               ret = write_sha1_file(buf, size, type, sha1);
+               ret = write_sha1_file(buf.buf, buf.len, type, sha1);
        else
-               ret = hash_sha1_file(buf, size, type, sha1);
-       free(buf);
+               ret = hash_sha1_file(buf.buf, buf.len, type, sha1);
+       strbuf_release(&buf);
+
        return ret;
 }