/*
* This function takes mdata->to_regexp and copies it into a struct
* sol_buffer, with all the number ref entries already replaced by the
* due text. It assumes that @a buf is already initialized.
*/
static int
get_unescaped_regexp_replacement_str(struct string_regexp_replace_data *mdata,
struct sol_buffer *buf,
int *match_vector,
size_t match_cnt)
{
int r;
struct sol_str_slice slice;
char *ptr = mdata->to_regexp;
SOL_NULL_CHECK(buf, -EINVAL);
/* \g<number> or \<number> syntax. Go on as far as numbers are in
* [0-9] range. Leading zeros are permitted.
*/
while (*ptr) {
if (*ptr == '\\') {
int n;
uint64_t grp_num = 0;
ptr++;
if (*ptr == 'g')
ptr++;
for (; (n = *ptr - '0') >= 0 && n <= 9; ptr++) {
if (!grp_num && !n) {
continue;
}
r = sol_util_uint64_mul(grp_num, 10, &grp_num);
SOL_INT_CHECK_GOTO(r, < 0, err);
r = sol_util_uint64_add(grp_num, n, &grp_num);
SOL_INT_CHECK_GOTO(r, < 0, err);
}
if (!grp_num || grp_num > match_cnt) {
sol_flow_send_error_packet(mdata->node, EINVAL,
"Could not process '%s' pattern's reference "
"to non-existent subpattern on '%s'",
mdata->to_regexp, mdata->regexp);
r = -EINVAL;
goto err;
}
slice = SOL_STR_SLICE_STR(mdata->orig_string
+ match_vector[grp_num * 2],
match_vector[grp_num * 2 + 1] - match_vector[grp_num * 2]);
r = sol_buffer_append_slice(buf, slice);
SOL_INT_CHECK_GOTO(r, < 0, err);
} else {
static int
token_get_uint64(const struct sol_json_token *token, uint64_t *value)
{
const char *itr = token->start;
uint64_t tmpvar = 0;
if (*itr == '+')
itr++;
for (; itr < token->end; itr++) {
const char c = *itr;
if (c >= '0' && c <= '9') {
int r;
r = sol_util_uint64_mul(tmpvar, 10, &tmpvar);
if (r < 0)
goto overflow;
r = sol_util_uint64_add(tmpvar, c - '0', &tmpvar);
if (r < 0)
goto overflow;
continue;
}
*value = tmpvar; /* best effort */
SOL_DBG("unexpected char '%c' at position %u of integer token %.*s",
c, (unsigned)(itr - token->start),
(int)sol_json_token_get_size(token), token->start);
return -EINVAL;
overflow:
*value = UINT64_MAX; /* best effort */
SOL_DBG("number is too large at position %u of integer token %.*s",
(unsigned)(itr - token->start),
(int)sol_json_token_get_size(token), token->start);
return -ERANGE;
}
*value = tmpvar;
return 0;
}
