[PATCH] diff: support long options

[Matheus Izvekov]

>From 7b74284ebe6222cb714c37cdbb94633965f29e9b Mon Sep 17 00:00:00 2001
From: Matheus Izvekov <mizvekov at gmail.com>
Date: Mon, 18 Jan 2010 18:36:52 -0200
Subject: [PATCH] diff: support long options

---
 editors/Config.in |    7 +++++++
 editors/diff.c    |   25 +++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/editors/Config.in b/editors/Config.in
index e1285f4..e4fdd0f 100644
--- a/editors/Config.in
+++ b/editors/Config.in
@@ -35,6 +35,13 @@ config DIFF
 	  differences between them in a form that can be given to
 	  the patch command.
 
+config FEATURE_DIFF_LONG_OPTIONS
+	bool "Enable long options"
+	default n
+	depends on DIFF && LONG_OPTS
+	help
+	  Enable use of long options.
+
 config FEATURE_DIFF_DIR
 	bool "Enable directory support"
 	default y
diff --git a/editors/diff.c b/editors/diff.c
index 7726104..9d0373f 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -876,6 +876,28 @@ static void diffdir(char *p[2], const char *s_start)
 }
 #endif
 
+#if ENABLE_FEATURE_DIFF_LONG_OPTIONS
+static const char diff_longopts[] ALIGN1 =
+	"ignore-case\0"              No_argument       "i"
+	"ignore-tab-expansion\0"     No_argument       "E"
+	"ignore-space-change\0"      No_argument       "b"
+	"ignore-all-space\0"         No_argument       "w"
+	"ignore-blank-lines\0"       No_argument       "B"
+	"text\0"                     No_argument       "a"
+	"unified\0"                  Required_argument "U"
+	"label\0"                    Required_argument "L"
+	"show-c-function\0"          No_argument       "p"
+	"brief\0"                    No_argument       "q"
+	"expand-tabs\0"              No_argument       "t"
+	"initial-tab\0"              No_argument       "T"
+	"recursive\0"                No_argument       "r"
+	"new-file\0"                 No_argument       "N"
+	"report-identical-files\0"   No_argument       "s"
+	"starting-file\0"            Required_argument "S"
+	"minimal\0"                  No_argument       "d"
+	;
+#endif
+
 int diff_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int diff_main(int argc UNUSED_PARAM, char **argv)
 {
@@ -887,6 +909,9 @@ int diff_main(int argc UNUSED_PARAM, char **argv)
 
 	/* exactly 2 params; collect multiple -L <label>; -U N */
 	opt_complementary = "=2:L::U+";
+#if ENABLE_FEATURE_DIFF_LONG_OPTIONS
+	applet_long_options = diff_longopts;
+#endif
 	getopt32(argv, "abdiL:NqrsS:tTU:wupBE",
 			&L_arg, &s_start, &opt_U_context);
 	argv += optind;
-- 
1.6.6