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-rw-r--r--toys/patch.c49
1 files changed, 32 insertions, 17 deletions
diff --git a/toys/patch.c b/toys/patch.c
index b296b1ea..a8a21728 100644
--- a/toys/patch.c
+++ b/toys/patch.c
@@ -37,7 +37,8 @@ static void do_line(void *data)
struct double_list *dlist = (struct double_list *)data;
if (TT.state && *dlist->data != TT.state)
- fdprintf(TT.fileout, "%s\n", dlist->data+(TT.state>1 ? 1 : 0));
+ fdprintf(TT.state == 2 ? 2: TT.fileout,
+ "%s\n", dlist->data+(TT.state>2 ? 1 : 0));
free(dlist->data);
free(dlist);
}
@@ -79,19 +80,22 @@ static void apply_hunk(void)
} else i = 0;
}
if (i < TT.context) goto fail_hunk;
- llist_free(temp->next, do_line);
- temp->next = NULL;
+ if (temp) {
+ llist_free(temp->next, do_line);
+ temp->next = NULL;
+ }
- // Search for a place to apply this hunk
+ // Search for a place to apply this hunk. Match all context lines and
+ // lines to be removed.
plist = TT.plines;
buf = NULL;
i = 0;
- for (;;) {
+ if (TT.context) for (;;) {
char *data = get_line(TT.filein);
TT.linenum++;
// If the file ended before we found a home for this hunk, fail.
- if (!data) break;
+ if (!data) goto fail_hunk;
dlist_add(&buf, data);
if (!backwards && *plist->data == "+-"[reverse]) {
@@ -110,25 +114,28 @@ static void apply_hunk(void)
plist = TT.plines;
} else {
plist = plist->next;
- if (!plist) {
- // Got it. Emit changed data.
- TT.state = "-+"[reverse];
- llist_free(TT.plines, do_line);
- TT.plines = NULL;
- buf->prev->next = NULL;
- TT.state = 0;
- llist_free(buf, do_line);
- return;
- }
+ if (!plist) break;
}
}
+
+ // Got it. Emit changed data.
+ TT.state = "-+"[reverse];
+ llist_free(TT.plines, do_line);
+ TT.plines = NULL;
+ TT.state = 0;
+ if (buf) {
+ buf->prev->next = NULL;
+ llist_free(buf, do_line);
+ }
+ return;
+
fail_hunk:
printf("Hunk FAILED.\n");
// If we got to this point, we've seeked to the end. Discard changes to
// this file and advance to next file.
- TT.state = 0;
+ TT.state = 2;
llist_free(TT.plines, do_line);
TT.plines = 0;
if (buf) {
@@ -137,6 +144,7 @@ fail_hunk:
}
delete_tempfile(TT.filein, TT.fileout, &TT.tempname);
TT.filein = -1;
+ TT.state = 0;
}
// state 0: Not in a hunk, look for +++.
@@ -181,6 +189,7 @@ void patch_main(void)
// Trim date from end of filename (if any). We don't care.
for (s = patchline+4; *s && *s!='\t'; s++)
if (*s=='\\' && s[1]) s++;
+ *s = 0;
TT.oldname = xstrdup(patchline+4);
} else if (!strncmp("+++ ", patchline, 4)) {
@@ -219,6 +228,12 @@ void patch_main(void)
// If the old file was null, we're creating a new one.
if (!strcmp(TT.oldname, "/dev/null")) {
printf("creating %s\n", start);
+ s = strrchr(start, '/');
+ if (s) {
+ *s = 0;
+ xmkpath(start, -1);
+ *s = '/';
+ }
TT.filein = xcreate(start, O_CREAT|O_RDWR, 0666);
} else {
printf("patching %s\n", start);