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authorJohannes Schindelin <Johannes.Schindelin@gmx.de>2006-07-28 17:46:11 +0200
committerJunio C Hamano <junkio@cox.net>2006-07-28 11:18:02 -0700
commite5a94313c06b83e034179ca6092ea23343e48dec (patch)
treeb64a550772210273793a7250635834edd803580d /builtin-apply.c
parent2941cab99ca9dec3356f0126be41bc3995bb1fef (diff)
downloadgit-e5a94313c06b83e034179ca6092ea23343e48dec.tar.gz
Teach git-apply about '-R'
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-apply.c')
-rw-r--r--builtin-apply.c65
1 files changed, 55 insertions, 10 deletions
diff --git a/builtin-apply.c b/builtin-apply.c
index d924ac3d0a..6b38a8ad0d 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -120,7 +120,7 @@ struct fragment {
struct patch {
char *new_name, *old_name, *def_name;
unsigned int old_mode, new_mode;
- int is_rename, is_copy, is_new, is_delete, is_binary;
+ int is_rename, is_copy, is_new, is_delete, is_binary, is_reverse;
#define BINARY_DELTA_DEFLATED 1
#define BINARY_LITERAL_DEFLATED 2
unsigned long deflate_origlen;
@@ -1119,6 +1119,34 @@ static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
return offset + hdrsize + patchsize;
}
+#define swap(a,b) myswap((a),(b),sizeof(a))
+
+#define myswap(a, b, size) do { \
+ unsigned char mytmp[size]; \
+ memcpy(mytmp, &a, size); \
+ memcpy(&a, &b, size); \
+ memcpy(&b, mytmp, size); \
+} while (0)
+
+static void reverse_patches(struct patch *p)
+{
+ for (; p; p = p->next) {
+ struct fragment *frag = p->fragments;
+
+ swap(p->new_name, p->old_name);
+ swap(p->new_mode, p->old_mode);
+ swap(p->is_new, p->is_delete);
+ swap(p->lines_added, p->lines_deleted);
+ swap(p->old_sha1_prefix, p->new_sha1_prefix);
+
+ for (; frag; frag = frag->next) {
+ swap(frag->newpos, frag->oldpos);
+ swap(frag->newlines, frag->oldlines);
+ }
+ p->is_reverse = !p->is_reverse;
+ }
+}
+
static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
static const char minuses[]= "----------------------------------------------------------------------";
@@ -1336,7 +1364,7 @@ static int apply_line(char *output, const char *patch, int plen)
}
static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag,
- int inaccurate_eof)
+ int reverse, int inaccurate_eof)
{
int match_beginning, match_end;
char *buf = desc->buffer;
@@ -1350,6 +1378,7 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag,
int pos, lines;
while (size > 0) {
+ char first;
int len = linelen(patch, size);
int plen;
@@ -1366,16 +1395,23 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag,
plen = len-1;
if (len < size && patch[len] == '\\')
plen--;
- switch (*patch) {
+ first = *patch;
+ if (reverse) {
+ if (first == '-')
+ first = '+';
+ else if (first == '+')
+ first = '-';
+ }
+ switch (first) {
case ' ':
case '-':
memcpy(old + oldsize, patch + 1, plen);
oldsize += plen;
- if (*patch == '-')
+ if (first == '-')
break;
/* Fall-through for ' ' */
case '+':
- if (*patch != '+' || !no_add)
+ if (first != '+' || !no_add)
newsize += apply_line(new + newsize, patch,
plen);
break;
@@ -1615,7 +1651,8 @@ static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
return apply_binary(desc, patch);
while (frag) {
- if (apply_one_fragment(desc, frag, patch->inaccurate_eof) < 0)
+ if (apply_one_fragment(desc, frag, patch->is_reverse,
+ patch->inaccurate_eof) < 0)
return error("patch failed: %s:%ld",
name, frag->oldpos);
frag = frag->next;
@@ -2142,7 +2179,8 @@ static int use_patch(struct patch *p)
return 1;
}
-static int apply_patch(int fd, const char *filename, int inaccurate_eof)
+static int apply_patch(int fd, const char *filename,
+ int reverse, int inaccurate_eof)
{
unsigned long offset, size;
char *buffer = read_patch_file(fd, &size);
@@ -2162,6 +2200,8 @@ static int apply_patch(int fd, const char *filename, int inaccurate_eof)
nr = parse_chunk(buffer + offset, size, patch);
if (nr < 0)
break;
+ if (reverse)
+ reverse_patches(patch);
if (use_patch(patch)) {
patch_stats(patch);
*listp = patch;
@@ -2226,6 +2266,7 @@ int cmd_apply(int argc, const char **argv, char **envp)
{
int i;
int read_stdin = 1;
+ int reverse = 0;
int inaccurate_eof = 0;
const char *whitespace_option = NULL;
@@ -2236,7 +2277,7 @@ int cmd_apply(int argc, const char **argv, char **envp)
int fd;
if (!strcmp(arg, "-")) {
- apply_patch(0, "<stdin>", inaccurate_eof);
+ apply_patch(0, "<stdin>", reverse, inaccurate_eof);
read_stdin = 0;
continue;
}
@@ -2313,6 +2354,10 @@ int cmd_apply(int argc, const char **argv, char **envp)
parse_whitespace_option(arg + 13);
continue;
}
+ if (!strcmp(arg, "-R") || !strcmp(arg, "--reverse")) {
+ reverse = 1;
+ continue;
+ }
if (!strcmp(arg, "--inaccurate-eof")) {
inaccurate_eof = 1;
continue;
@@ -2333,12 +2378,12 @@ int cmd_apply(int argc, const char **argv, char **envp)
usage(apply_usage);
read_stdin = 0;
set_default_whitespace_mode(whitespace_option);
- apply_patch(fd, arg, inaccurate_eof);
+ apply_patch(fd, arg, reverse, inaccurate_eof);
close(fd);
}
set_default_whitespace_mode(whitespace_option);
if (read_stdin)
- apply_patch(0, "<stdin>", inaccurate_eof);
+ apply_patch(0, "<stdin>", reverse, inaccurate_eof);
if (whitespace_error) {
if (squelch_whitespace_errors &&
squelch_whitespace_errors < whitespace_error) {