int linear_search_item_iterator::next(const linear_searcher &searcher,
const char **startp, int *lengthp,
reference_id *ridp)
{
const char *bufstart = lsi->fbuf.get_start();
const char *bufend = lsi->fbuf.get_end();
const char *ptr = bufstart + pos;
if (ptr < bufend && searcher.search(ptr, bufend, startp, lengthp)) {
pos = *startp + *lengthp - bufstart;
if (ridp)
*ridp = reference_id(lsi->filename_id, *startp - bufstart);
return 1;
}
else
return 0;
}
int index_search_item_iterator::get_tag(int tagno,
const linear_searcher &searchr,
const char **pp, int *lenp,
reference_id *ridp)
{
if (tagno < 0 || tagno >= indx->header.tags_size) {
error("bad tag number");
return 0;
}
tag *tp = indx->tags + tagno;
const char *filename = indx->munge_filename(indx->pool + tp->filename_index);
int fd = open(filename, O_RDONLY | O_BINARY);
if (fd < 0) {
error("can't open `%1': %2", filename, strerror(errno));
return 0;
}
struct stat sb;
if (fstat(fd, &sb) < 0) {
error("can't fstat: %1", strerror(errno));
close(fd);
return 0;
}
time_t mtime = sb.st_mtime;
if (mtime > indx->mtime) {
indx->add_out_of_date_file(fd, filename,
indx->filename_id + tp->filename_index);
return 0;
}
int res = 0;
FILE *fp = fdopen(fd, FOPEN_RB);
if (!fp) {
error("fdopen failed");
close(fd);
return 0;
}
if (tp->start != 0 && fseek(fp, long(tp->start), 0) < 0)
error("can't seek on `%1': %2", filename, strerror(errno));
else {
int length = tp->length;
int err = 0;
if (length == 0) {
if (fstat(fileno(fp), &sb) < 0) {
error("can't stat `%1': %2", filename, strerror(errno));
err = 1;
}
else if (!S_ISREG(sb.st_mode)) {
error("`%1' is not a regular file", filename);
err = 1;
}
else
length = int(sb.st_size);
}
if (!err) {
if (length + 2 > buflen) {
a_delete buf;
buflen = length + 2;
buf = new char[buflen];
}
if (fread(buf + 1, 1, length, fp) != (size_t)length)
error("fread on `%1' failed: %2", filename, strerror(errno));
else {
buf[0] = '\n';
// Remove the CR characters from CRLF pairs.
int sidx = 1, didx = 1;
for ( ; sidx < length + 1; sidx++, didx++)
{
if (buf[sidx] == '\r')
{
if (buf[++sidx] != '\n')
buf[didx++] = '\r';
else
length--;
}
if (sidx != didx)
buf[didx] = buf[sidx];
}
buf[length + 1] = '\n';
res = searchr.search(buf + 1, buf + 2 + length, pp, lenp);
if (res && ridp)
*ridp = reference_id(indx->filename_id + tp->filename_index,
tp->start);
}
}
}
fclose(fp);
return res;
}
