remove the artificial restriction tagsize < 8kb

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index 2230010..e444d9d 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1645,16 +1645,24 @@ int has_sha1_file(const unsigned char *sha1)
        return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
-int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+/*
+ * reads from fd as long as possible into a supplied buffer of size bytes.
+ * If neccessary the buffer's size is increased using realloc()
+ *
+ * returns 0 if anything went fine and -1 otherwise
+ *
+ * NOTE: both buf and size may change, but even when -1 is returned
+ * you still have to free() it yourself.
+ */
+int read_pipe(int fd, char** return_buf, unsigned long* return_size)
 {
-       unsigned long size = 4096;
-       char *buf = malloc(size);
-       int iret, ret;
+       char* buf = *return_buf;
+       unsigned long size = *return_size;
+       int iret;
        unsigned long off = 0;
-       unsigned char hdr[50];
-       int hdrlen;
+
        do {
-               iret = read(fd, buf + off, size - off);
+               iret = xread(fd, buf + off, size - off);
                if (iret > 0) {
                        off += iret;
                        if (off == size) {
@@ -1663,16 +1671,34 @@ int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
                        }
                }
        } while (iret > 0);
-       if (iret < 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 = malloc(size);
+       int ret;
+       unsigned char hdr[50];
+       int hdrlen;
+
+       if (read_pipe(fd, &buf, &size)) {
                free(buf);
                return -1;
        }
+
        if (!type)
                type = blob_type;
        if (write_object)
-               ret = write_sha1_file(buf, off, type, sha1);
+               ret = write_sha1_file(buf, size, type, sha1);
        else {
-               write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
+               write_sha1_file_prepare(buf, size, type, sha1, hdr, &hdrlen);
                ret = 0;
        }
        free(buf);