From: Petr Baudis Date: Wed, 29 Mar 2006 00:16:33 +0000 (+0200) Subject: Support for pickaxe matching regular expressions X-Git-Tag: v1.3.0-rc3~16^2~1 X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=d01d8c6782850c18d62676dae3c72ad73be1e52e;p=git.git Support for pickaxe matching regular expressions git-diff-* --pickaxe-regex will change the -S pickaxe to match POSIX extended regular expressions instead of fixed strings. The regex.h library is a rather stupid interface and I like pcre too, but with any luck it will be everywhere we will want to run Git on, it being POSIX.2 and all. I'm not sure if we can expect platforms like AIX to conform to POSIX.2 or if win32 has regex.h. We might add a flag to Makefile if there is a portability trouble potential. Signed-off-by: Petr Baudis --- diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index 2a0275eed..ec6811c71 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -69,6 +69,10 @@ changeset, not just the files that contain the change in . +--pickaxe-regex:: + Make the not a plain string but an extended POSIX + regex to match. + -O:: Output the patch in the order specified in the , which has one shell glob pattern per line. diff --git a/diff.c b/diff.c index e496905ba..2db2cc568 100644 --- a/diff.c +++ b/diff.c @@ -883,6 +883,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) options->filter = arg + 14; else if (!strcmp(arg, "--pickaxe-all")) options->pickaxe_opts = DIFF_PICKAXE_ALL; + else if (!strcmp(arg, "--pickaxe-regex")) + options->pickaxe_opts = DIFF_PICKAXE_REGEX; else if (!strncmp(arg, "-B", 2)) { if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) diff --git a/diff.h b/diff.h index a268d16ff..0cebec113 100644 --- a/diff.h +++ b/diff.h @@ -102,6 +102,7 @@ extern int diff_setup_done(struct diff_options *); #define DIFF_DETECT_COPY 2 #define DIFF_PICKAXE_ALL 1 +#define DIFF_PICKAXE_REGEX 2 extern void diffcore_std(struct diff_options *); diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c index 50e46ab86..d89f314f6 100644 --- a/diffcore-pickaxe.c +++ b/diffcore-pickaxe.c @@ -1,12 +1,15 @@ /* * Copyright (C) 2005 Junio C Hamano */ +#include + #include "cache.h" #include "diff.h" #include "diffcore.h" static unsigned int contains(struct diff_filespec *one, - const char *needle, unsigned long len) + const char *needle, unsigned long len, + regex_t *regexp) { unsigned int cnt; unsigned long offset, sz; @@ -18,15 +21,28 @@ static unsigned int contains(struct diff_filespec *one, data = one->data; cnt = 0; - /* Yes, I've heard of strstr(), but the thing is *data may - * not be NUL terminated. Sue me. - */ - for (offset = 0; offset + len <= sz; offset++) { - /* we count non-overlapping occurrences of needle */ - if (!memcmp(needle, data + offset, len)) { - offset += len - 1; + if (regexp) { + regmatch_t regmatch; + int flags = 0; + + while (*data && !regexec(regexp, data, 1, ®match, flags)) { + flags |= REG_NOTBOL; + data += regmatch.rm_so; + if (*data) data++; cnt++; } + + } else { /* Classic exact string match */ + /* Yes, I've heard of strstr(), but the thing is *data may + * not be NUL terminated. Sue me. + */ + for (offset = 0; offset + len <= sz; offset++) { + /* we count non-overlapping occurrences of needle */ + if (!memcmp(needle, data + offset, len)) { + offset += len - 1; + cnt++; + } + } } return cnt; } @@ -36,10 +52,24 @@ void diffcore_pickaxe(const char *needle, int opts) struct diff_queue_struct *q = &diff_queued_diff; unsigned long len = strlen(needle); int i, has_changes; + regex_t regex, *regexp = NULL; struct diff_queue_struct outq; outq.queue = NULL; outq.nr = outq.alloc = 0; + if (opts & DIFF_PICKAXE_REGEX) { + int err; + err = regcomp(®ex, needle, REG_EXTENDED | REG_NEWLINE); + if (err) { + /* The POSIX.2 people are surely sick */ + char errbuf[1024]; + regerror(err, ®ex, errbuf, 1024); + regfree(®ex); + die("invalid pickaxe regex: %s", errbuf); + } + regexp = ®ex; + } + if (opts & DIFF_PICKAXE_ALL) { /* Showing the whole changeset if needle exists */ for (i = has_changes = 0; !has_changes && i < q->nr; i++) { @@ -48,16 +78,16 @@ void diffcore_pickaxe(const char *needle, int opts) if (!DIFF_FILE_VALID(p->two)) continue; /* ignore unmerged */ /* created */ - if (contains(p->two, needle, len)) + if (contains(p->two, needle, len, regexp)) has_changes++; } else if (!DIFF_FILE_VALID(p->two)) { - if (contains(p->one, needle, len)) + if (contains(p->one, needle, len, regexp)) has_changes++; } else if (!diff_unmodified_pair(p) && - contains(p->one, needle, len) != - contains(p->two, needle, len)) + contains(p->one, needle, len, regexp) != + contains(p->two, needle, len, regexp)) has_changes++; } if (has_changes) @@ -80,16 +110,16 @@ void diffcore_pickaxe(const char *needle, int opts) if (!DIFF_FILE_VALID(p->two)) ; /* ignore unmerged */ /* created */ - else if (contains(p->two, needle, len)) + else if (contains(p->two, needle, len, regexp)) has_changes = 1; } else if (!DIFF_FILE_VALID(p->two)) { - if (contains(p->one, needle, len)) + if (contains(p->one, needle, len, regexp)) has_changes = 1; } else if (!diff_unmodified_pair(p) && - contains(p->one, needle, len) != - contains(p->two, needle, len)) + contains(p->one, needle, len, regexp) != + contains(p->two, needle, len, regexp)) has_changes = 1; if (has_changes) @@ -98,6 +128,10 @@ void diffcore_pickaxe(const char *needle, int opts) diff_free_filepair(p); } + if (opts & DIFF_PICKAXE_REGEX) { + regfree(®ex); + } + free(q->queue); *q = outq; return;