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![Bo Yang](/assets/img/avatar_default.png)
Refactor the diff_queue_struct code, this macro help to reset the structure. Signed-off-by: Bo Yang <struggleyb.nku@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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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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static unsigned int contains(struct diff_filespec *one,
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const char *needle, unsigned long len,
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regex_t *regexp)
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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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if (diff_populate_filespec(one, 0))
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return 0;
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if (!len)
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return 0;
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sz = one->size;
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data = one->data;
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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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const char *found = memmem(data, sz, needle, len);
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if (!found)
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break;
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sz -= found - data + len;
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data = found + len;
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cnt++;
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}
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}
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diff_free_filespec_data(one);
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return cnt;
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}
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void diffcore_pickaxe(const char *needle, int opts)
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{
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struct diff_queue_struct *q = &diff_queued_diff;
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unsigned long len = strlen(needle);
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int i, has_changes;
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regex_t regex, *regexp = NULL;
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struct diff_queue_struct outq;
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DIFF_QUEUE_CLEAR(&outq);
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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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}
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if (opts & DIFF_PICKAXE_ALL) {
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/* Showing the whole changeset if needle exists */
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for (i = has_changes = 0; !has_changes && i < q->nr; i++) {
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struct diff_filepair *p = q->queue[i];
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if (!DIFF_FILE_VALID(p->one)) {
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if (!DIFF_FILE_VALID(p->two))
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continue; /* ignore unmerged */
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/* created */
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if (contains(p->two, needle, len, regexp))
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has_changes++;
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}
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else if (!DIFF_FILE_VALID(p->two)) {
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if (contains(p->one, needle, len, regexp))
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has_changes++;
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}
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else if (!diff_unmodified_pair(p) &&
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contains(p->one, needle, len, regexp) !=
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contains(p->two, needle, len, regexp))
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has_changes++;
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}
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if (has_changes)
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return; /* not munge the queue */
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/* otherwise we will clear the whole queue
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* by copying the empty outq at the end of this
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* function, but first clear the current entries
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* 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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}
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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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has_changes = 0;
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if (!DIFF_FILE_VALID(p->one)) {
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if (!DIFF_FILE_VALID(p->two))
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; /* ignore unmerged */
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/* created */
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else if (contains(p->two, needle, len, regexp))
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has_changes = 1;
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}
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else if (!DIFF_FILE_VALID(p->two)) {
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if (contains(p->one, needle, len, regexp))
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has_changes = 1;
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}
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else if (!diff_unmodified_pair(p) &&
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contains(p->one, needle, len, regexp) !=
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contains(p->two, needle, len, regexp))
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has_changes = 1;
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if (has_changes)
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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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if (opts & DIFF_PICKAXE_REGEX) {
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regfree(®ex);
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}
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free(q->queue);
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*q = outq;
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return;
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}
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