[gsoc-diff] diff --assume-text

gistfile1.diff

diff --git a/diff.c b/diff.c
index 1b940ee..66b998e 100644
--- a/diff.c
+++ b/diff.c
@@ -2854,11 +2854,13 @@ static void run_diff_cmd(const char *pgm,
 				  complete_rewrite);
 		return;
 	}
-	if (one && two)
+	if (one && two) {
+		if (o->flags & DIFF_OPT_ASSUME_TEXT)
+			one->is_binary = two->is_binary = 0;
 		builtin_diff(name, other ? other : name,
 			     one, two, xfrm_msg, must_show_header,
 			     o, complete_rewrite);
-	else
+	} else
 		fprintf(o->file, "* Unmerged path %s\n", name);
 }
 
@@ -3457,7 +3459,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
 	else if (!prefixcmp(arg, "--submodule=")) {
 		if (!strcmp(arg + 12, "log"))
 			DIFF_OPT_SET(options, SUBMODULE_LOG);
-	}
+	} else if (!prefixcmp(arg, "--assume-text"))
+		DIFF_OPT_SET(options, ASSUME_TEXT);
 
 	/* misc options */
 	else if (!strcmp(arg, "-z"))
diff --git a/diff.h b/diff.h
index 6d303c1..2351f93 100644
--- a/diff.h
+++ b/diff.h
@@ -59,7 +59,7 @@ typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data)
 #define DIFF_OPT_FIND_COPIES_HARDER  (1 <<  6)
 #define DIFF_OPT_FOLLOW_RENAMES      (1 <<  7)
 #define DIFF_OPT_COLOR_DIFF          (1 <<  8)
-/* (1 <<  9) unused */
+#define DIFF_OPT_ASSUME_TEXT         (1 <<  9)
 #define DIFF_OPT_HAS_CHANGES         (1 << 10)
 #define DIFF_OPT_QUICK               (1 << 11)
 #define DIFF_OPT_NO_INDEX            (1 << 12)