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![Jeff King](/assets/img/avatar_default.png)
We currently just look at raw blob data when using "-S" to pickaxe. This is mostly historical, as pickaxe predates the textconv feature. If the user has bothered to define a textconv filter, it is more likely that their search string will be on the textconv output, as that is what they will see in the diff (and we do not even provide a mechanism for them to search for binary needles that contain NUL characters). This patch teaches "-S" to use textconv, just as we already do for "-G". Signed-off-by: Jeff King <peff@peff.net>
290 lines
6.7 KiB
C
290 lines
6.7 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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* Copyright (C) 2010 Google Inc.
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*/
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#include "cache.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "xdiff-interface.h"
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#include "kwset.h"
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typedef int (*pickaxe_fn)(struct diff_filepair *p, struct diff_options *o, regex_t *regexp, kwset_t kws);
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static void pickaxe(struct diff_queue_struct *q, struct diff_options *o,
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regex_t *regexp, kwset_t kws, pickaxe_fn fn)
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{
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int i;
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struct diff_queue_struct outq;
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DIFF_QUEUE_CLEAR(&outq);
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if (o->pickaxe_opts & DIFF_PICKAXE_ALL) {
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/* Showing the whole changeset if needle exists */
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for (i = 0; i < q->nr; i++) {
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struct diff_filepair *p = q->queue[i];
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if (fn(p, o, regexp, kws))
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return; /* do not munge the queue */
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}
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/*
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* Otherwise we will clear the whole queue by copying
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* the empty outq at the end of this function, but
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* first clear the current entries in the queue.
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*/
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for (i = 0; i < q->nr; i++)
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diff_free_filepair(q->queue[i]);
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} else {
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/* Showing only the filepairs that has the needle */
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for (i = 0; i < q->nr; i++) {
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struct diff_filepair *p = q->queue[i];
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if (fn(p, o, regexp, kws))
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diff_q(&outq, p);
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else
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diff_free_filepair(p);
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}
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}
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free(q->queue);
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*q = outq;
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}
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struct diffgrep_cb {
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regex_t *regexp;
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int hit;
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};
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static void diffgrep_consume(void *priv, char *line, unsigned long len)
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{
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struct diffgrep_cb *data = priv;
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regmatch_t regmatch;
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int hold;
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if (line[0] != '+' && line[0] != '-')
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return;
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if (data->hit)
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/*
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* NEEDSWORK: we should have a way to terminate the
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* caller early.
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*/
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return;
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/* Yuck -- line ought to be "const char *"! */
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hold = line[len];
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line[len] = '\0';
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data->hit = !regexec(data->regexp, line + 1, 1, ®match, 0);
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line[len] = hold;
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}
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static void fill_one(struct diff_filespec *one,
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mmfile_t *mf, struct userdiff_driver **textconv)
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{
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if (DIFF_FILE_VALID(one)) {
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*textconv = get_textconv(one);
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mf->size = fill_textconv(*textconv, one, &mf->ptr);
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} else {
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memset(mf, 0, sizeof(*mf));
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}
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}
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static int diff_grep(struct diff_filepair *p, struct diff_options *o,
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regex_t *regexp, kwset_t kws)
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{
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regmatch_t regmatch;
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struct userdiff_driver *textconv_one = NULL;
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struct userdiff_driver *textconv_two = NULL;
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mmfile_t mf1, mf2;
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int hit;
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if (diff_unmodified_pair(p))
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return 0;
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fill_one(p->one, &mf1, &textconv_one);
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fill_one(p->two, &mf2, &textconv_two);
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if (!mf1.ptr) {
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if (!mf2.ptr)
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return 0; /* ignore unmerged */
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/* created "two" -- does it have what we are looking for? */
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hit = !regexec(regexp, mf2.ptr, 1, ®match, 0);
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} else if (!mf2.ptr) {
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/* removed "one" -- did it have what we are looking for? */
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hit = !regexec(regexp, mf1.ptr, 1, ®match, 0);
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} else {
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/*
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* We have both sides; need to run textual diff and see if
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* the pattern appears on added/deleted lines.
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*/
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struct diffgrep_cb ecbdata;
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xpparam_t xpp;
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xdemitconf_t xecfg;
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memset(&xpp, 0, sizeof(xpp));
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memset(&xecfg, 0, sizeof(xecfg));
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ecbdata.regexp = regexp;
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ecbdata.hit = 0;
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xecfg.ctxlen = o->context;
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xecfg.interhunkctxlen = o->interhunkcontext;
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xdi_diff_outf(&mf1, &mf2, diffgrep_consume, &ecbdata,
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&xpp, &xecfg);
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hit = ecbdata.hit;
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}
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if (textconv_one)
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free(mf1.ptr);
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if (textconv_two)
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free(mf2.ptr);
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return hit;
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}
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static void diffcore_pickaxe_grep(struct diff_options *o)
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{
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int err;
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regex_t regex;
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int cflags = REG_EXTENDED | REG_NEWLINE;
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if (DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE))
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cflags |= REG_ICASE;
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err = regcomp(®ex, o->pickaxe, cflags);
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if (err) {
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char errbuf[1024];
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regerror(err, ®ex, errbuf, 1024);
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regfree(®ex);
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die("invalid log-grep regex: %s", errbuf);
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}
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pickaxe(&diff_queued_diff, o, ®ex, NULL, diff_grep);
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regfree(®ex);
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return;
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}
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static unsigned int contains(mmfile_t *mf, struct diff_options *o,
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regex_t *regexp, kwset_t kws)
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{
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unsigned int cnt;
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unsigned long sz;
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const char *data;
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sz = mf->size;
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data = mf->ptr;
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cnt = 0;
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if (regexp) {
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regmatch_t regmatch;
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int flags = 0;
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assert(data[sz] == '\0');
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while (*data && !regexec(regexp, data, 1, ®match, flags)) {
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flags |= REG_NOTBOL;
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data += regmatch.rm_eo;
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if (*data && regmatch.rm_so == regmatch.rm_eo)
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data++;
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cnt++;
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}
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} else { /* Classic exact string match */
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while (sz) {
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struct kwsmatch kwsm;
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size_t offset = kwsexec(kws, data, sz, &kwsm);
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const char *found;
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if (offset == -1)
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break;
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else
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found = data + offset;
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sz -= found - data + kwsm.size[0];
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data = found + kwsm.size[0];
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cnt++;
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}
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}
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return cnt;
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}
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static int has_changes(struct diff_filepair *p, struct diff_options *o,
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regex_t *regexp, kwset_t kws)
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{
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struct userdiff_driver *textconv_one = get_textconv(p->one);
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struct userdiff_driver *textconv_two = get_textconv(p->two);
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mmfile_t mf1, mf2;
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int ret;
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if (!o->pickaxe[0])
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return 0;
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/*
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* If we have an unmodified pair, we know that the count will be the
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* same and don't even have to load the blobs. Unless textconv is in
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* play, _and_ we are using two different textconv filters (e.g.,
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* because a pair is an exact rename with different textconv attributes
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* for each side, which might generate different content).
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*/
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if (textconv_one == textconv_two && diff_unmodified_pair(p))
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return 0;
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fill_one(p->one, &mf1, &textconv_one);
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fill_one(p->two, &mf2, &textconv_two);
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if (!mf1.ptr) {
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if (!mf2.ptr)
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ret = 0; /* ignore unmerged */
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/* created */
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ret = contains(&mf2, o, regexp, kws) != 0;
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}
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else if (!mf2.ptr) /* removed */
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ret = contains(&mf1, o, regexp, kws) != 0;
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else
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ret = contains(&mf1, o, regexp, kws) !=
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contains(&mf2, o, regexp, kws);
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if (textconv_one)
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free(mf1.ptr);
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if (textconv_two)
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free(mf2.ptr);
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diff_free_filespec_data(p->one);
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diff_free_filespec_data(p->two);
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return ret;
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}
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static void diffcore_pickaxe_count(struct diff_options *o)
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{
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const char *needle = o->pickaxe;
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int opts = o->pickaxe_opts;
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unsigned long len = strlen(needle);
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regex_t regex, *regexp = NULL;
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kwset_t kws = NULL;
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if (opts & DIFF_PICKAXE_REGEX) {
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int err;
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err = regcomp(®ex, needle, REG_EXTENDED | REG_NEWLINE);
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if (err) {
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/* The POSIX.2 people are surely sick */
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char errbuf[1024];
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regerror(err, ®ex, errbuf, 1024);
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regfree(®ex);
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die("invalid pickaxe regex: %s", errbuf);
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}
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regexp = ®ex;
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} else {
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kws = kwsalloc(DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE)
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? tolower_trans_tbl : NULL);
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kwsincr(kws, needle, len);
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kwsprep(kws);
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}
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pickaxe(&diff_queued_diff, o, regexp, kws, has_changes);
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if (opts & DIFF_PICKAXE_REGEX)
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regfree(®ex);
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else
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kwsfree(kws);
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return;
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}
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void diffcore_pickaxe(struct diff_options *o)
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{
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/* Might want to warn when both S and G are on; I don't care... */
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if (o->pickaxe_opts & DIFF_PICKAXE_KIND_G)
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diffcore_pickaxe_grep(o);
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else
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diffcore_pickaxe_count(o);
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}
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