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/*
Copyright(C) 2014-2015 Brazil
Copyright(C) 2022 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "grn_expr_code.h"
uint32_t
grn_expr_code_n_used_codes(grn_ctx *ctx,
grn_expr_code *start,
grn_expr_code *target)
{
unsigned int n_codes;
int i, n_args;
grn_expr_code *sub_code;
if (start == target) {
return 0;
}
n_args = target->nargs;
if (target->value) {
n_args--;
if (n_args == 0) {
return 1;
}
}
n_codes = 1;
sub_code = target - 1;
for (i = 0; i < n_args; i++) {
uint32_t sub_n_codes;
sub_n_codes = grn_expr_code_n_used_codes(ctx, start, sub_code);
n_codes += sub_n_codes;
sub_code -= sub_n_codes;
if (sub_code < start) {
/* TODO: report error */
return 0;
}
}
return n_codes;
}
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