git-svn: trailing slash in prefix is mandatory with --branches/-b

[git.git] / xdiff-interface.c

diff --git a/xdiff-interface.c b/xdiff-interface.c
index 6c1f99b149f0800a9c9ab1b45033bc1401a84766..e407cf11b1d8ba28be64eda7bcb505d9edb4d253 100644 (file)
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -107,17 +107,25 @@ int read_mmfile(mmfile_t *ptr, const char *filename)
 {
        struct stat st;
        FILE *f;
+       size_t sz;
 
        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)
+       sz = xsize_t(st.st_size);
+       ptr->ptr = xmalloc(sz);
+       if (fread(ptr->ptr, sz, 1, f) != 1)
                return error("Could not read %s", filename);
        fclose(f);
-       ptr->size = st.st_size;
+       ptr->size = sz;
        return 0;
 }
 
-
+#define FIRST_FEW_BYTES 8000
+int buffer_is_binary(const char *ptr, unsigned long size)
+{
+       if (FIRST_FEW_BYTES < size)
+               size = FIRST_FEW_BYTES;
+       return !!memchr(ptr, 0, size);
+}