mirror of
https://github.com/janet-lang/janet
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51 lines
2.1 KiB
C
51 lines
2.1 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 "cache.h"
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/* Create a new empty tuple of the given size. This will return memory
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* which should be filled with DstValues. The memory will not be collected until
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* dst_tuple_end is called. */
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DstValue *dst_tuple_begin(uint32_t length) {
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char *data = dst_alloc(DST_MEMORY_NONE, 2 * sizeof(uint32_t) + length * sizeof(DstValue));
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DstValue *tuple = (DstValue *)(data + (2 * sizeof(uint32_t)));
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dst_tuple_length(tuple) = length;
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return tuple;
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}
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/* Finish building a tuple */
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const DstValue *dst_tuple_end(DstValue *tuple) {
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DstValue check;
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dst_tuple_hash(tuple) = dst_calchash_array(tuple, dst_tuple_length(tuple));
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check = dst_cache_add(dst_wrap_tuple((const DstValue *) tuple));
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dst_gc_settype(dst_tuple_raw(check.as.tuple), DST_MEMORY_TUPLE);
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return check.as.tuple;
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}
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/* Build a tuple with n values */
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const DstValue *dst_tuple_n(DstValue *values, uint32_t n) {
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DstValue *t = dst_tuple_begin(n);
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memcpy(t, values, sizeof(DstValue) * n);
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return dst_tuple_end(t);
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}
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