index_fd(): split into two helper functions

Split out the case where we do not know the size of the input (hence we
read everything into a strbuf before doing anything) to index_pipe(), and
the other case where we mmap or read the whole data to index_bulk().

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_file.c b/sha1_file.c
index 17c179c9fd6e06c8c344332f876f8731c5ea2fb3..49416b02917ef600d927f8d9398c0a55a3eafc78 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2619,22 +2619,29 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
        return ret;
 }
 
+static int index_pipe(unsigned char *sha1, int fd, enum object_type type,
+                     const char *path, unsigned flags)
+{
+       struct strbuf sbuf = STRBUF_INIT;
+       int ret;
+
+       if (strbuf_read(&sbuf, fd, 4096) >= 0)
+               ret = index_mem(sha1, sbuf.buf, sbuf.len, type, path, flags);
+       else
+               ret = -1;
+       strbuf_release(&sbuf);
+       return ret;
+}
+
 #define SMALL_FILE_SIZE (32*1024)
 
-int index_fd(unsigned char *sha1, int fd, struct stat *st,
-            enum object_type type, const char *path, unsigned flags)
+static int index_core(unsigned char *sha1, int fd, size_t size,
+                     enum object_type type, const char *path,
+                     unsigned flags)
 {
        int ret;
-       size_t size = xsize_t(st->st_size);
 
-       if (!S_ISREG(st->st_mode)) {
-               struct strbuf sbuf = STRBUF_INIT;
-               if (strbuf_read(&sbuf, fd, 4096) >= 0)
-                       ret = index_mem(sha1, sbuf.buf, sbuf.len, type, path, flags);
-               else
-                       ret = -1;
-               strbuf_release(&sbuf);
-       } else if (!size) {
+       if (!size) {
                ret = index_mem(sha1, NULL, size, type, path, flags);
        } else if (size <= SMALL_FILE_SIZE) {
                char *buf = xmalloc(size);
@@ -2648,6 +2655,19 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st,
                ret = index_mem(sha1, buf, size, type, path, flags);
                munmap(buf, size);
        }
+       return ret;
+}
+
+int index_fd(unsigned char *sha1, int fd, struct stat *st,
+            enum object_type type, const char *path, unsigned flags)
+{
+       int ret;
+       size_t size = xsize_t(st->st_size);
+
+       if (!S_ISREG(st->st_mode))
+               ret = index_pipe(sha1, fd, type, path, flags);
+       else
+               ret = index_core(sha1, fd, size, type, path, flags);
        close(fd);
        return ret;
 }