static int diff_grep(mmfile_t *one, mmfile_t *two,
struct diff_options *o,
regex_t *regexp, kwset_t kws)
{
regmatch_t regmatch;
struct diffgrep_cb ecbdata;
xpparam_t xpp;
xdemitconf_t xecfg;
if (!one)
return !regexec_buf(regexp, two->ptr, two->size,
1, ®match, 0);
if (!two)
return !regexec_buf(regexp, one->ptr, one->size,
1, ®match, 0);
/*
* We have both sides; need to run textual diff and see if
* the pattern appears on added/deleted lines.
*/
memset(&xpp, 0, sizeof(xpp));
memset(&xecfg, 0, sizeof(xecfg));
ecbdata.regexp = regexp;
ecbdata.hit = 0;
xecfg.ctxlen = o->context;
xecfg.interhunkctxlen = o->interhunkcontext;
if (xdi_diff_outf(one, two, diffgrep_consume, &ecbdata, &xpp, &xecfg))
return 0;
return ecbdata.hit;
}
static int patmatch(struct grep_pat *p, char *line, char *eol,
regmatch_t *match, int eflags)
{
int hit;
if (p->fixed)
hit = !fixmatch(p, line, eol, match);
else if (p->pcre_regexp)
hit = !pcrematch(p, line, eol, match, eflags);
else
hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
eflags);
return hit;
}
static void diffgrep_consume(void *priv, char *line, unsigned long len)
{
struct diffgrep_cb *data = priv;
regmatch_t regmatch;
if (line[0] != '+' && line[0] != '-')
return;
if (data->hit)
/*
* NEEDSWORK: we should have a way to terminate the
* caller early.
*/
return;
data->hit = !regexec_buf(data->regexp, line + 1, len - 1, 1,
®match, 0);
}
static unsigned int contains(mmfile_t *mf, regex_t *regexp, kwset_t kws)
{
unsigned int cnt;
unsigned long sz;
const char *data;
sz = mf->size;
data = mf->ptr;
cnt = 0;
if (regexp) {
regmatch_t regmatch;
int flags = 0;
while (sz && *data &&
!regexec_buf(regexp, data, sz, 1, ®match, flags)) {
flags |= REG_NOTBOL;
data += regmatch.rm_eo;
sz -= regmatch.rm_eo;
if (sz && *data && regmatch.rm_so == regmatch.rm_eo) {
data++;
sz--;
}
cnt++;
}
} else { /* Classic exact string match */
while (sz) {
struct kwsmatch kwsm;
size_t offset = kwsexec(kws, data, sz, &kwsm);
if (offset == -1)
break;
sz -= offset + kwsm.size[0];
data += offset + kwsm.size[0];
cnt++;
}
}
return cnt;
}
static long ff_regexp(const char *line, long len,
char *buffer, long buffer_size, void *priv)
{
struct ff_regs *regs = priv;
regmatch_t pmatch[2];
int i;
int result;
/* Exclude terminating newline (and cr) from matching */
if (len > 0 && line[len-1] == '\n') {
if (len > 1 && line[len-2] == '\r')
len -= 2;
else
len--;
}
for (i = 0; i < regs->nr; i++) {
struct ff_reg *reg = regs->array + i;
if (!regexec_buf(®->re, line, len, 2, pmatch, 0)) {
if (reg->negate)
return -1;
break;
}
}
if (regs->nr <= i)
return -1;
i = pmatch[1].rm_so >= 0 ? 1 : 0;
line += pmatch[i].rm_so;
result = pmatch[i].rm_eo - pmatch[i].rm_so;
if (result > buffer_size)
result = buffer_size;
while (result > 0 && (isspace(line[result - 1])))
result--;
memcpy(buffer, line, result);
return result;
}
