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https://github.com/janet-lang/janet
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605848b217
util.c and make public API smaller. Pad strings and symbols with extra 0 byte for better interop with C.
78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <dst/dst.h>
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#include "sourcemap.h"
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/* Get the sub source map by indexing a value. Used to traverse
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* into arrays and tuples */
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const Dst *dst_sourcemap_index(const Dst *map, int32_t index) {
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if (NULL != map && dst_tuple_length(map) >= 3) {
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const Dst *seq;
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int32_t len;
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if (dst_seq_view(map[2], &seq, &len)) {
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if (index >= 0 && index < len) {
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if (dst_checktype(seq[index], DST_TUPLE)) {
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const Dst *ret = dst_unwrap_tuple(seq[index]);
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if (dst_tuple_length(ret) >= 2 &&
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dst_checktype(ret[0], DST_INTEGER) &&
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dst_checktype(ret[1], DST_INTEGER)) {
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return ret;
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}
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}
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}
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}
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}
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return NULL;
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}
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/* Traverse into tables and structs */
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static const Dst *dst_sourcemap_kv(const Dst *map, Dst key, int kv) {
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if (NULL != map && dst_tuple_length(map) >= 3) {
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Dst kvpair = dst_get(map[2], key);
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if (dst_checktype(kvpair, DST_TUPLE)) {
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const Dst *kvtup = dst_unwrap_tuple(kvpair);
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if (dst_tuple_length(kvtup) >= 2) {
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if (dst_checktype(kvtup[kv], DST_TUPLE)) {
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const Dst *ret = dst_unwrap_tuple(kvtup[kv]);
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if (dst_tuple_length(ret) >= 2 &&
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dst_checktype(ret[0], DST_INTEGER) &&
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dst_checktype(ret[1], DST_INTEGER)) {
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return ret;
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}
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}
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}
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}
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}
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return NULL;
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}
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/* Traverse into a key of a table or struct */
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const Dst *dst_sourcemap_key(const Dst *map, Dst key) {
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return dst_sourcemap_kv(map, key, 0);
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}
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/* Traverse into a value of a table or struct */
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const Dst *dst_sourcemap_value(const Dst *map, Dst key) {
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return dst_sourcemap_kv(map, key, 1);
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}
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