move read_mmfile() into xdiff-interface

read_file() was a useful function if you want to work with the xdiff stuff,
so it was renamed and put into a more central place.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/xdiff-interface.c b/xdiff-interface.c
index 08602f522..6c1f99b14 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -102,3 +102,22 @@ int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
 	}
 	return 0;
 }
+
+int read_mmfile(mmfile_t *ptr, const char *filename)
+{
+	struct stat st;
+	FILE *f;
+
+	if (stat(filename, &st))
+		return error("Could not stat %s", filename);
+	if ((f = fopen(filename, "rb")) == NULL)
+		return error("Could not open %s", filename);
+	ptr->ptr = xmalloc(st.st_size);
+	if (fread(ptr->ptr, st.st_size, 1, f) != 1)
+		return error("Could not read %s", filename);
+	fclose(f);
+	ptr->size = st.st_size;
+	return 0;
+}
+
+