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mirror of https://github.com/janet-lang/janet synced 2024-06-14 09:26:49 +00:00
janet/src/core/os.c
2018-05-17 23:41:20 -04:00

135 lines
3.9 KiB
C

/*
* Copyright (c) 2018 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <dst/dst.h>
#include <dst/dstcorelib.h>
#include <stdlib.h>
#include <time.h>
#ifdef DST_WINDOWS
#include <Windows.h>
#else
#include <unistd.h>
#endif
static int os_execute(DstArgs args) {
int nofirstarg = (args.n < 1 || !dst_checktype(args.v[0], DST_STRING));
const char *cmd = nofirstarg
? NULL
: (const char *) dst_unwrap_string(args.v[0]);
int stat = system(cmd);
DST_RETURN(args, cmd
? dst_wrap_integer(stat)
: dst_wrap_boolean(stat));
}
static int os_getenv(DstArgs args) {
if (args.n != 1 || !dst_checktype(args.v[0], DST_STRING))
DST_THROW(args, "expected string");
const char *cstr = (const char *) dst_unwrap_string(args.v[0]);
const char *res = getenv(cstr);
DST_RETURN(args, cstr
? dst_cstringv(res)
: dst_wrap_nil());
}
static int os_setenv(DstArgs args) {
int t2;
if (args.n < 2) DST_THROW(args, "expected 2 arguments");
t2 = dst_type(args.v[1]);
if (!dst_checktype(args.v[0], DST_STRING)
|| (t2 != DST_STRING && t2 != DST_NIL))
DST_THROW(args, "expected string");
const char *k = (const char *) dst_unwrap_string(args.v[0]);
#ifdef DST_WINDOWS
if (t2 == DST_NIL) {
// Investigate best way to delete env vars on windows. Use winapi?
_putenv_s(k, "");
} else {
const char *v = (const char *) dst_unwrap_string(args.v[1]);
_putenv_s(k, v);
}
#else
if (t2 == DST_NIL) {
unsetenv(k);
} else {
const char *v = (const char *) dst_unwrap_string(args.v[1]);
setenv(k, v, 1);
}
#endif
return 0;
}
static int os_exit(DstArgs args) {
DST_MAXARITY(args, 1);
if (args.n == 0) {
exit(EXIT_SUCCESS);
} else if (dst_checktype(args.v[0], DST_TRUE)
|| dst_checktype(args.v[0], DST_FALSE)) {
exit(dst_unwrap_boolean(args.v[0]) ? EXIT_SUCCESS : EXIT_FAILURE);
return 0;
} else {
exit(dst_hash(args.v[0]));
}
return 0;
}
static int os_clock(DstArgs args) {
DST_FIXARITY(args, 0);
clock_t time = clock();
double dtime = time / (double) (CLOCKS_PER_SEC);
DST_RETURN_REAL(args, dtime);
}
static int os_sleep(DstArgs args) {
int32_t delay;
DST_FIXARITY(args, 1);
DST_ARG_INTEGER(delay, args, 0);
if (delay < 0) {
DST_THROW(args, "invalid argument to sleep");
}
#ifdef DST_WINDOWS
Sleep(delay);
#else
sleep((unsigned int) delay);
#endif
return 0;
}
static const DstReg cfuns[] = {
{"os.execute", os_execute},
{"os.exit", os_exit},
{"os.getenv", os_getenv},
{"os.setenv", os_setenv},
{"os.clock", os_clock},
{"os.sleep", os_sleep},
{NULL, NULL}
};
/* Module entry point */
int dst_lib_os(DstArgs args) {
DstTable *env = dst_env_arg(args);
dst_env_cfuns(env, cfuns);
return 0;
}