From 859f9c45814afae3250424946e2156ea366224f7 Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Date: Wed, 14 Feb 2007 01:30:29 +0100
Subject: teach diff machinery about --ignore-space-at-eol
`git diff --ignore-space-at-eol` will ignore whitespace at the
line ends.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
xdiff/xdiff.h | 3 ++-
xdiff/xutils.c | 24 ++++++++++++++++++++++++
2 files changed, 26 insertions(+), 1 deletion(-)
(limited to 'xdiff')
diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index fa409d5234..e874a7c46a 100644
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -31,7 +31,8 @@ extern "C" {
#define XDF_NEED_MINIMAL (1 << 1)
#define XDF_IGNORE_WHITESPACE (1 << 2)
#define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
-#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE)
+#define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4)
+#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
#define XDL_PATCH_NORMAL '-'
#define XDL_PATCH_REVERSE '+'
diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index 1b899f32c4..3653864e4b 100644
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -215,6 +215,21 @@ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
return 0;
}
return (i1 >= s1 && i2 >= s2);
+ } else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL) {
+ for (i1 = i2 = 0; i1 < s1 && i2 < s2; ) {
+ if (l1[i1] != l2[i2]) {
+ while (i1 < s1 && isspace(l1[i1]))
+ i1++;
+ while (i2 < s2 && isspace(l2[i2]))
+ i2++;
+ if (i1 < s1 || i2 < s2)
+ return 0;
+ return 1;
+ }
+ i1++;
+ i2++;
+ }
+ return i1 >= s1 && i2 >= s2;
} else
return s1 == s2 && !memcmp(l1, l2, s1);
@@ -227,6 +242,7 @@ unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
for (; ptr < top && *ptr != '\n'; ptr++) {
if (isspace(*ptr) && (flags & XDF_WHITESPACE_FLAGS)) {
+ const char *ptr2 = ptr;
while (ptr + 1 < top && isspace(ptr[1])
&& ptr[1] != '\n')
ptr++;
@@ -235,6 +251,14 @@ unsigned long xdl_hash_record(char const **data, char const *top, long flags) {
ha += (ha << 5);
ha ^= (unsigned long) ' ';
}
+ if (flags & XDF_IGNORE_WHITESPACE_AT_EOL
+ && ptr[1] != '\n') {
+ while (ptr2 != ptr + 1) {
+ ha += (ha << 5);
+ ha ^= (unsigned long) *ptr2;
+ ptr2++;
+ }
+ }
continue;
}
ha += (ha << 5);
--
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