mirror of https://github.com/janet-lang/janet
76 lines
2.5 KiB
C
76 lines
2.5 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 <dst/dstcorelib.h>
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/* Use LoadLibrary on windows or dlopen on posix to load dynamic libaries
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* with native code. */
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#ifdef DST_WINDOWS
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#include <windows.h>
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typedef HINSTANCE Clib;
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#define load_clib(name) LoadLibrary((name))
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#define symbol_clib(lib, sym) GetProcAddress((lib), (sym))
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#define error_clib() "could not load dynamic library"
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#else
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#include <dlfcn.h>
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typedef void *Clib;
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#define load_clib(name) dlopen((name), RTLD_NOW)
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#define symbol_clib(lib, sym) dlsym((lib), (sym))
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#define error_clib() dlerror()
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#endif
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DstCFunction dst_native(const char *name, const uint8_t **error) {
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Clib lib = load_clib(name);
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DstCFunction init;
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if (!lib) {
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*error = dst_cstring(error_clib());
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return NULL;
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}
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init = (DstCFunction) symbol_clib(lib, "_dst_init");
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if (!init) {
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*error = dst_cstring("could not find _dst_init symbol");
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return NULL;
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}
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return init;
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}
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int dst_core_native(DstArgs args) {
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DstCFunction init;
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const uint8_t *error = NULL;
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if (args.n < 1) {
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*args.ret = dst_cstringv("expected at least one argument");
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return 1;
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}
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if (!dst_checktype(args.v[0], DST_STRING)) {
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*args.ret = dst_cstringv("expected string");
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return 1;
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}
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init = dst_native((const char *)dst_unwrap_string(args.v[0]), &error);
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if (!init) {
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*args.ret = dst_wrap_string(error);
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return 1;
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}
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*args.ret = dst_wrap_cfunction(init);
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return 0;
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}
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