diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/posix/patch.c | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/toys/posix/patch.c b/toys/posix/patch.c index eb7849d4..f36b18f7 100644 --- a/toys/posix/patch.c +++ b/toys/posix/patch.c @@ -21,7 +21,7 @@ * -F fuzz (number, default 2) * [file] which file to patch -USE_PATCH(NEWTOY(patch, USE_TOYBOX_DEBUG("x")"up#i:R", TOYFLAG_USR|TOYFLAG_BIN)) +USE_PATCH(NEWTOY(patch, USE_TOYBOX_DEBUG("x")"ulp#i:R", TOYFLAG_USR|TOYFLAG_BIN)) config PATCH bool "patch" @@ -32,7 +32,8 @@ config PATCH Apply a unified diff to one or more files. -i Input file (defaults=stdin) - -p number of '/' to strip from start of file paths (default=all) + -l Loose match (ignore whitespace) + -p Number of '/' to strip from start of file paths (default=all) -R Reverse patch. -u Ignored (only handles "unified" diffs) @@ -59,8 +60,11 @@ DEFINE_GLOBALS( #define TT this.patch -#define FLAG_REVERSE 1 -#define FLAG_PATHLEN 4 +#define FLAG_R (1<<0) +#define FLAG_i (1<<1) +#define FLAG_l (1<<2) +#define FLAG_p (1<<3) +#define FLAG_u (1<<4) // Dispose of a line of input, either by writing it out or discarding it. @@ -69,7 +73,7 @@ DEFINE_GLOBALS( // state = 3: write whole line to fileout // state > 3: write line+1 to fileout when *line != state -#define PATCH_DEBUG (CFG_TOYBOX_DEBUG && (toys.optflags & 16)) +#define PATCH_DEBUG (CFG_TOYBOX_DEBUG && (toys.optflags & 32)) static void do_line(void *data) { @@ -114,6 +118,19 @@ static void fail_hunk(void) TT.state = 0; } +// Compare ignoring whitespace. Just returns +static int loosecmp(char *aa, char *bb) +{ + int a = 0, b = 0; + + for (;;) { + while (isspace(aa[a])) a++; + while (isspace(bb[b])) b++; + if (aa[a] != bb[b]) return 1; + if (!aa[a]) return 0; + } +} + // Given a hunk of a unified diff, make the appropriate change to the file. // This does not use the location information, but instead treats a hunk // as a sort of regex. Copies data from input to output until it finds @@ -124,7 +141,10 @@ static void fail_hunk(void) static int apply_one_hunk(void) { struct double_list *plist, *buf = NULL, *check; - int matcheof = 0, reverse = toys.optflags & FLAG_REVERSE, backwarn = 0; + int matcheof = 0, reverse = toys.optflags & FLAG_R, backwarn = 0; + int (*lcmp)(char *aa, char *bb); + + lcmp = (toys.optflags & FLAG_l) ? (void *)loosecmp : (void *)strcmp; // Break doubly linked list so we can use singly linked traversal function. TT.current_hunk->prev->next = NULL; @@ -152,7 +172,7 @@ static int apply_one_hunk(void) // Figure out which line of hunk to compare with next. (Skip lines // of the hunk we'd be adding.) while (plist && *plist->data == "+-"[reverse]) { - if (data && !strcmp(data, plist->data+1)) { + if (data && !lcmp(data, plist->data+1)) { if (!backwarn) backwarn = TT.linenum; } plist = plist->next; @@ -176,7 +196,6 @@ static int apply_one_hunk(void) check = dlist_add(&buf, data); // Compare this line with next expected line of hunk. - // todo: teach the strcmp() to ignore whitespace. // A match can fail because the next line doesn't match, or because // we hit the end of a hunk that needed EOF, and this isn't EOF. @@ -186,7 +205,7 @@ static int apply_one_hunk(void) // out of buffer. for (;;) { - if (!plist || strcmp(check->data, plist->data+1)) { + if (!plist || lcmp(check->data, plist->data+1)) { // Match failed. Write out first line of buffered data and // recheck remaining buffered data for a new match. @@ -243,7 +262,7 @@ done: void patch_main(void) { - int reverse = toys.optflags&FLAG_REVERSE, state = 0, patchlinenum = 0, + int reverse = toys.optflags&FLAG_R, state = 0, patchlinenum = 0, strip = 0; char *oldname = NULL, *newname = NULL; @@ -360,7 +379,7 @@ void patch_main(void) // handle -p path truncation. for (i = 0, s = name; *s;) { - if ((toys.optflags & FLAG_PATHLEN) && TT.prefix == i) break; + if ((toys.optflags & FLAG_p) && TT.prefix == i) break; if (*s++ != '/') continue; while (*s == '/') s++; name = s; @@ -372,7 +391,7 @@ void patch_main(void) xunlink(name); state = 0; // If we've got a file to open, do so. - } else if (!(toys.optflags & FLAG_PATHLEN) || i <= TT.prefix) { + } else if (!(toys.optflags & FLAG_p) || i <= TT.prefix) { // If the old file was null, we're creating a new one. if (!strcmp(oldname, "/dev/null") || !oldsum) { printf("creating %s\n", name); |