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teach diff machinery about --ignore-space-at-eol

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`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>
This commit is contained in:
Johannes Schindelin 2007-02-14 01:30:29 +01:00 committed by Junio C Hamano
parent 44478d99ee
commit 859f9c4581
3 changed files with 28 additions and 1 deletions
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2
diff.c
View File

@ -2038,6 +2038,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
options->xdl_opts |= XDF_IGNORE_WHITESPACE;
else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change"))
options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
else if (!strcmp(arg, "--ignore-space-at-eol"))
options->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL;
else if (!strcmp(arg, "--color-words"))
options->color_diff = options->color_diff_words = 1;
else if (!strcmp(arg, "--no-renames"))

3
xdiff/xdiff.h
View File

@ -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 '+'

24
xdiff/xutils.c
View File

@ -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);