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/*
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
#include "diff.h"
#include "diffcore.h"
#include "delta.h"
static int contains(struct diff_filespec *one,
const char *needle, unsigned long len)
{
unsigned long offset, sz;
const char *data;
if (diff_populate_filespec(one))
return 0;
sz = one->size;
data = one->data;
for (offset = 0; offset + len <= sz; offset++)
if (!strncmp(needle, data + offset, len))
return 1;
return 0;
}
void diffcore_pickaxe(const char *needle)
{
struct diff_queue_struct *q = &diff_queued_diff;
unsigned long len = strlen(needle);
int i;
struct diff_queue_struct outq;
outq.queue = NULL;
outq.nr = outq.alloc = 0;
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
int onum = outq.nr;
if (!DIFF_FILE_VALID(p->one)) {
if (!DIFF_FILE_VALID(p->two))
continue; /* ignore nonsense */
/* created */
if (contains(p->two, needle, len))
diff_q(&outq, p);
}
else if (!DIFF_FILE_VALID(p->two)) {
if (contains(p->one, needle, len))
diff_q(&outq, p);
}
else if (!diff_unmodified_pair(p) &&
contains(p->one, needle, len) !=
contains(p->two, needle, len))
diff_q(&outq, p);
if (onum == outq.nr)
diff_free_filepair(p);
}
free(q->queue);
*q = outq;
return;
}
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