mirror of
https://github.com/janet-lang/janet
synced 2025-02-18 09:40:02 +00:00
6b95326d7c
remove some complexity and unexpected behavior around numbers in general as all numbers are the same number type, IEEE 754 double precision numbers. Also update examples and tests, some of which were out of date. Some more testing may be needed for new changes to numbers.
343 lines
9.5 KiB
C
343 lines
9.5 KiB
C
/*
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* Copyright (c) 2018 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 <janet/janet.h>
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#include <stdlib.h>
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#include <time.h>
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#ifdef JANET_WINDOWS
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#include <Windows.h>
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#include <direct.h>
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#else
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#endif
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/* For macos */
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#ifdef __MACH__
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#include <mach/clock.h>
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#include <mach/mach.h>
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#endif
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static int os_which(JanetArgs args) {
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#ifdef JANET_WINDOWS
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JANET_RETURN_CSYMBOL(args, ":windows");
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#elif __APPLE__
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JANET_RETURN_CSYMBOL(args, ":macos");
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#elif defined(__EMSCRIPTEN__)
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JANET_RETURN_CSYMBOL(args, ":web");
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#else
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JANET_RETURN_CSYMBOL(args, ":posix");
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#endif
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}
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#ifdef JANET_WINDOWS
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static int os_execute(JanetArgs args) {
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JANET_MINARITY(args, 1);
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JanetBuffer *buffer = janet_buffer(10);
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for (int32_t i = 0; i < args.n; i++) {
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const uint8_t *argstring;
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JANET_ARG_STRING(argstring, args, i);
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janet_buffer_push_bytes(buffer, argstring, janet_string_length(argstring));
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if (i != args.n - 1) {
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janet_buffer_push_u8(buffer, ' ');
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}
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}
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janet_buffer_push_u8(buffer, 0);
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/* Convert to wide chars */
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wchar_t *sys_str = malloc(buffer->count * sizeof(wchar_t));
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if (NULL == sys_str) {
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JANET_OUT_OF_MEMORY;
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}
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int nwritten = MultiByteToWideChar(
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CP_UTF8,
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MB_PRECOMPOSED,
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buffer->data,
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buffer->count,
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sys_str,
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buffer->count);
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if (nwritten == 0) {
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free(sys_str);
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JANET_THROW(args, "could not create process");
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}
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STARTUPINFO si;
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PROCESS_INFORMATION pi;
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ZeroMemory(&si, sizeof(si));
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si.cb = sizeof(si);
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ZeroMemory(&pi, sizeof(pi));
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// Start the child process.
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if(!CreateProcess(NULL,
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(LPSTR) sys_str,
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NULL,
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NULL,
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FALSE,
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0,
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NULL,
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NULL,
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&si,
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&pi)) {
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free(sys_str);
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JANET_THROW(args, "could not create process");
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}
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free(sys_str);
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// Wait until child process exits.
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WaitForSingleObject(pi.hProcess, INFINITE);
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// Close process and thread handles.
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WORD status;
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GetExitCodeProcess(pi.hProcess, (LPDWORD)&status);
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CloseHandle(pi.hProcess);
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CloseHandle(pi.hThread);
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JANET_RETURN_INTEGER(args, (int32_t)status);
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}
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#else
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static int os_execute(JanetArgs args) {
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JANET_MINARITY(args, 1);
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const uint8_t **argv = malloc(sizeof(uint8_t *) * (args.n + 1));
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if (NULL == argv) {
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JANET_OUT_OF_MEMORY;
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}
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for (int32_t i = 0; i < args.n; i++) {
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JANET_ARG_STRING(argv[i], args, i);
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}
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argv[args.n] = NULL;
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/* Fork child process */
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pid_t pid = fork();
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if (pid < 0) {
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JANET_THROW(args, "failed to execute");
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} else if (pid == 0) {
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if (-1 == execve((const char *)argv[0], (char **)argv, NULL)) {
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exit(1);
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}
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}
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int status;
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waitpid(pid, &status, 0);
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JANET_RETURN_INTEGER(args, status);
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}
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#endif
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static int os_shell(JanetArgs args) {
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int nofirstarg = (args.n < 1 || !janet_checktype(args.v[0], JANET_STRING));
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const char *cmd = nofirstarg
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? NULL
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: (const char *) janet_unwrap_string(args.v[0]);
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int stat = system(cmd);
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JANET_RETURN(args, cmd
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? janet_wrap_integer(stat)
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: janet_wrap_boolean(stat));
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}
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static int os_getenv(JanetArgs args) {
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const uint8_t *k;
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JANET_FIXARITY(args, 1);
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JANET_ARG_STRING(k, args, 0);
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const char *cstr = (const char *) k;
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const char *res = getenv(cstr);
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if (!res) {
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JANET_RETURN_NIL(args);
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}
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JANET_RETURN(args, cstr
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? janet_cstringv(res)
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: janet_wrap_nil());
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}
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static int os_setenv(JanetArgs args) {
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#ifdef JANET_WINDOWS
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#define SETENV(K,V) _putenv_s(K, V)
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#define UNSETENV(K) _putenv_s(K, "")
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#else
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#define SETENV(K,V) setenv(K, V, 1)
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#define UNSETENV(K) unsetenv(K)
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#endif
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const uint8_t *k;
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const char *ks;
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JANET_MAXARITY(args, 2);
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JANET_MINARITY(args, 1);
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JANET_ARG_STRING(k, args, 0);
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ks = (const char *) k;
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if (args.n == 1 || janet_checktype(args.v[1], JANET_NIL)) {
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UNSETENV(ks);
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} else {
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const uint8_t *v;
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JANET_ARG_STRING(v, args, 1);
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const char *vc = (const char *) v;
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SETENV(ks, vc);
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}
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return 0;
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}
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static int os_exit(JanetArgs args) {
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JANET_MAXARITY(args, 1);
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if (args.n == 0) {
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exit(EXIT_SUCCESS);
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} else if (janet_checkint(args.v[0])) {
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exit(janet_unwrap_integer(args.v[0]));
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} else {
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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static int os_time(JanetArgs args) {
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JANET_FIXARITY(args, 0);
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double dtime = (double)(time(NULL));
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JANET_RETURN_NUMBER(args, dtime);
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}
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/* Clock shims */
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#ifdef JANET_WINDOWS
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static int gettime(struct timespec *spec) {
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int64_t wintime = 0LL;
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GetSystemTimeAsFileTime((FILETIME*)&wintime);
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/* Windows epoch is January 1, 1601 apparently*/
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wintime -= 116444736000000000LL;
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spec->tv_sec = wintime / 10000000LL;
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/* Resolution is 100 nanoseconds. */
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spec->tv_nsec = wintime % 10000000LL * 100;
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return 0;
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}
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#elif defined(__MACH__)
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static int gettime(struct timespec *spec) {
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clock_serv_t cclock;
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mach_timespec_t mts;
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host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
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clock_get_time(cclock, &mts);
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mach_port_deallocate(mach_task_self(), cclock);
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spec->tv_sec = mts.tv_sec;
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spec->tv_nsec = mts.tv_nsec;
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return 0;
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}
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#else
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#define gettime(TV) clock_gettime(CLOCK_MONOTONIC, (TV))
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#endif
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static int os_clock(JanetArgs args) {
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JANET_FIXARITY(args, 0);
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struct timespec tv;
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if (gettime(&tv))
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JANET_THROW(args, "could not get time");
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double dtime = tv.tv_sec + (tv.tv_nsec / 1E9);
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JANET_RETURN_NUMBER(args, dtime);
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}
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static int os_sleep(JanetArgs args) {
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double delay;
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JANET_FIXARITY(args, 1);
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JANET_ARG_NUMBER(delay, args, 0);
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if (delay < 0) {
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JANET_THROW(args, "invalid argument to sleep");
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}
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#ifdef JANET_WINDOWS
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Sleep((DWORD) (delay * 1000));
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#else
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struct timespec ts;
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ts.tv_sec = (time_t) delay;
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ts.tv_nsec = (delay <= UINT32_MAX)
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? (long)((delay - ((uint32_t)delay)) * 1000000000)
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: 0;
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nanosleep(&ts, NULL);
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#endif
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return 0;
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}
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static int os_cwd(JanetArgs args) {
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JANET_FIXARITY(args, 0);
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char buf[FILENAME_MAX];
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char *ptr;
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#ifdef JANET_WINDOWS
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ptr = _getcwd(buf, FILENAME_MAX);
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#else
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ptr = getcwd(buf, FILENAME_MAX);
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#endif
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if (NULL == ptr) {
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JANET_THROW(args, "could not get current directory");
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}
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JANET_RETURN_CSTRING(args, ptr);
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}
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static const JanetReg cfuns[] = {
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{"os/which", os_which,
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"(os/which)\n\n"
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"Check the current operating system. Returns one of:\n\n"
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"\t:windows - Microsoft Windows\n"
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"\t:macos - Apple macos\n"
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"\t:posix - A POSIX compatible system (default)"
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},
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{"os/execute", os_execute,
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"(os/execute program & args)\n\n"
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"Execute a program on the system and pass it string arguments. Returns "
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"the exit status of the program."
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},
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{"os/shell", os_shell,
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"(os/shell str)\n\n"
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"Pass a command string str directly to the system shell."
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},
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{"os/exit", os_exit,
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"(os/exit x)\n\n"
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"Exit from janet with an exit code equal to x. If x is not an integer, "
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"the exit with status equal the hash of x."
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},
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{"os/getenv", os_getenv,
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"(os/getenv variable)\n\n"
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"Get the string value of an environment variable."
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},
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{"os/setenv", os_setenv,
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"(os/setenv variable value)\n\n"
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"Set an environment variable."
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},
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{"os/time", os_time,
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"(os/time)\n\n"
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"Get the current time expressed as the number of seconds since "
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"January 1, 1970, the Unix epoch. Returns a real number."
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},
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{"os/clock", os_clock,
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"(os/clock)\n\n"
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"Return the number of seconds since some fixed point in time. The clock "
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"is guaranteed to be non decreased in real time."
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},
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{"os/sleep", os_sleep,
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"(os/sleep nsec)\n\n"
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"Suspend the program for nsec seconds. 'nsec' can be a real number. Returns "
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"nil."
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},
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{"os/cwd", os_cwd,
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"(os/cwd)\n\n"
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"Returns the current working directory."
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},
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{NULL, NULL, NULL}
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};
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/* Module entry point */
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int janet_lib_os(JanetArgs args) {
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JanetTable *env = janet_env(args);
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janet_cfuns(env, NULL, cfuns);
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return 0;
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}
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