mirror of https://github.com/janet-lang/janet
85 lines
2.9 KiB
C
85 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 "internal.h"
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/* Wrapper functions wrap a data type that is used from C into a
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* gst value, which can then be used in gst. */
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DstValue dst_wrap_nil() {
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GstValue y;
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y.type = GST_NIL;
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return y;
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}
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int dst_check_nil(Gst *vm, uint32_t i) {
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DstValue a = dst_arg(vm, i);
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return a.type == DST_NIL;
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}
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#define DST_WRAP_DEFINE(NAME, TYPE, DTYPE, UM)\
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DstValue dst_wrap_##NAME(TYPE x) {\
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DstValue y;\
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y.type = DTYPE;\
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y.data.UM = x;\
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return y;\
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}\
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\
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int dst_check_##NAME(Dst *vm, uint32_t i) {\
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return dst_arg(vm, i).type == DTYPE;\
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}\
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DST_WRAP_DEFINE(real, DstReal, DST_REAL, real)
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DST_WRAP_DEFINE(integer, DstInteger, DST_INTEGER, integer)
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DST_WRAP_DEFINE(boolean, int, DST_BOOLEAN, boolean)
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DST_WRAP_DEFINE(string, const uint8_t *, DST_STRING, string)
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DST_WRAP_DEFINE(symbol, const uint8_t *, DST_SYMBOL, string)
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DST_WRAP_DEFINE(array, DstArray *, DST_ARRAY, array)
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DST_WRAP_DEFINE(tuple, const DstValue *, DST_TUPLE, tuple)
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DST_WRAP_DEFINE(struct, const DstValue *, DST_STRUCT, st)
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DST_WRAP_DEFINE(thread, DstThread *, DST_THREAD, thread)
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DST_WRAP_DEFINE(buffer, DstBuffer *, DST_BYTEBUFFER, buffer)
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DST_WRAP_DEFINE(function, DstFunction *, DST_FUNCTION, function)
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DST_WRAP_DEFINE(cfunction, DstCFunction, DST_CFUNCTION, cfunction)
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DST_WRAP_DEFINE(table, DstTable *, DST_TABLE, table)
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DST_WRAP_DEFINE(funcenv, DstFuncEnv *, DST_FUNCENV, env)
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DST_WRAP_DEFINE(funcdef, DstFuncDef *, DST_FUNCDEF, def)
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#undef DST_WRAP_DEFINE
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DstValue dst_wrap_userdata(void *x) {
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DstValue ret;
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ret.type = DST_USERDATA;
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ret.data.pointer = x;
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return ret;
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}
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void *dst_check_userdata(Dst *vm, uint32_t i, const DstUserType *type) {
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DstValue x = dst_arg(vm, i);
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DstUserdataHeader *h;
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if (x.type != DST_USERDATA) return NULL;
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h = dst_udata_header(x.data.pointer);
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if (h->type != type) return NULL;
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return x.data.pointer;
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}
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