forked from mia/Aegisub
305 lines
6.8 KiB
C
305 lines
6.8 KiB
C
/*
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** OS library.
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** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
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**
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** Major portions taken verbatim or adapted from the Lua interpreter.
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** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
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*/
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#include <errno.h>
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#include <time.h>
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#define lib_os_c
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#define LUA_LIB
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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#include "lj_obj.h"
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#include "lj_err.h"
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#include "lj_lib.h"
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#if LJ_TARGET_POSIX
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#include <unistd.h>
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#else
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#include <stdio.h>
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#endif
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#if !LJ_TARGET_PSVITA
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#include <locale.h>
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#endif
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/* ------------------------------------------------------------------------ */
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#if LJ_TARGET_WINDOWS
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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static wchar_t *widen_static(const char *narrow, int idx)
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{
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__declspec(thread) static wchar_t buffer[2][MAX_PATH];
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return MultiByteToWideChar(CP_UTF8, 0, narrow, -1, buffer[idx], MAX_PATH) ? buffer[idx] : L"";
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}
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#define remove(x) _wremove(widen_static(x, 0))
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#define system(x) _wsystem(widen_static(x, 0))
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#define rename(x, y) _wrename(widen_static(x, 0), widen_static(y, 1))
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#endif
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/* ------------------------------------------------------------------------ */
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#define LJLIB_MODULE_os
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LJLIB_CF(os_execute)
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{
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#if LJ_NO_SYSTEM
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#if LJ_52
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errno = ENOSYS;
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return luaL_fileresult(L, 0, NULL);
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#else
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lua_pushinteger(L, -1);
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return 1;
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#endif
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#else
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const char *cmd = luaL_optstring(L, 1, NULL);
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int stat = system(cmd);
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#if LJ_52
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if (cmd)
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return luaL_execresult(L, stat);
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setboolV(L->top++, 1);
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#else
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setintV(L->top++, stat);
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#endif
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return 1;
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#endif
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}
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LJLIB_CF(os_remove)
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{
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const char *filename = luaL_checkstring(L, 1);
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return luaL_fileresult(L, remove(filename) == 0, filename);
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}
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LJLIB_CF(os_rename)
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{
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const char *fromname = luaL_checkstring(L, 1);
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const char *toname = luaL_checkstring(L, 2);
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return luaL_fileresult(L, rename(fromname, toname) == 0, fromname);
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}
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LJLIB_CF(os_tmpname)
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{
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#if LJ_TARGET_PS3 || LJ_TARGET_PS4 || LJ_TARGET_PSVITA
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lj_err_caller(L, LJ_ERR_OSUNIQF);
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return 0;
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#else
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#if LJ_TARGET_POSIX
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char buf[15+1];
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int fp;
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strcpy(buf, "/tmp/lua_XXXXXX");
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fp = mkstemp(buf);
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if (fp != -1)
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close(fp);
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else
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lj_err_caller(L, LJ_ERR_OSUNIQF);
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#else
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char buf[L_tmpnam];
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if (tmpnam(buf) == NULL)
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lj_err_caller(L, LJ_ERR_OSUNIQF);
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#endif
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lua_pushstring(L, buf);
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return 1;
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#endif
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}
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LJLIB_CF(os_getenv)
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{
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#if LJ_TARGET_CONSOLE
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lua_pushnil(L);
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#else
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lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
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#endif
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return 1;
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}
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LJLIB_CF(os_exit)
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{
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int status;
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if (L->base < L->top && tvisbool(L->base))
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status = boolV(L->base) ? EXIT_SUCCESS : EXIT_FAILURE;
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else
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status = lj_lib_optint(L, 1, EXIT_SUCCESS);
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if (L->base+1 < L->top && tvistruecond(L->base+1))
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lua_close(L);
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exit(status);
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return 0; /* Unreachable. */
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}
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LJLIB_CF(os_clock)
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{
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setnumV(L->top++, ((lua_Number)clock())*(1.0/(lua_Number)CLOCKS_PER_SEC));
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return 1;
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}
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/* ------------------------------------------------------------------------ */
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static void setfield(lua_State *L, const char *key, int value)
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{
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lua_pushinteger(L, value);
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lua_setfield(L, -2, key);
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}
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static void setboolfield(lua_State *L, const char *key, int value)
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{
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if (value < 0) /* undefined? */
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return; /* does not set field */
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lua_pushboolean(L, value);
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lua_setfield(L, -2, key);
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}
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static int getboolfield(lua_State *L, const char *key)
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{
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int res;
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lua_getfield(L, -1, key);
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res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
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lua_pop(L, 1);
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return res;
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}
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static int getfield(lua_State *L, const char *key, int d)
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{
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int res;
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lua_getfield(L, -1, key);
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if (lua_isnumber(L, -1)) {
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res = (int)lua_tointeger(L, -1);
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} else {
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if (d < 0)
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lj_err_callerv(L, LJ_ERR_OSDATEF, key);
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res = d;
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}
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lua_pop(L, 1);
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return res;
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}
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LJLIB_CF(os_date)
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{
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const char *s = luaL_optstring(L, 1, "%c");
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time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
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struct tm *stm;
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#if LJ_TARGET_POSIX
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struct tm rtm;
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#endif
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if (*s == '!') { /* UTC? */
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s++; /* Skip '!' */
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#if LJ_TARGET_POSIX
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stm = gmtime_r(&t, &rtm);
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#else
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stm = gmtime(&t);
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#endif
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} else {
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#if LJ_TARGET_POSIX
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stm = localtime_r(&t, &rtm);
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#else
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stm = localtime(&t);
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#endif
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}
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if (stm == NULL) { /* Invalid date? */
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setnilV(L->top-1);
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} else if (strcmp(s, "*t") == 0) {
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lua_createtable(L, 0, 9); /* 9 = number of fields */
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setfield(L, "sec", stm->tm_sec);
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setfield(L, "min", stm->tm_min);
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setfield(L, "hour", stm->tm_hour);
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setfield(L, "day", stm->tm_mday);
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setfield(L, "month", stm->tm_mon+1);
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setfield(L, "year", stm->tm_year+1900);
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setfield(L, "wday", stm->tm_wday+1);
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setfield(L, "yday", stm->tm_yday+1);
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setboolfield(L, "isdst", stm->tm_isdst);
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} else {
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char cc[3];
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luaL_Buffer b;
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cc[0] = '%'; cc[2] = '\0';
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luaL_buffinit(L, &b);
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for (; *s; s++) {
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if (*s != '%' || *(s + 1) == '\0') { /* No conversion specifier? */
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luaL_addchar(&b, *s);
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} else {
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size_t reslen;
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char buff[200]; /* Should be big enough for any conversion result. */
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cc[1] = *(++s);
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reslen = strftime(buff, sizeof(buff), cc, stm);
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luaL_addlstring(&b, buff, reslen);
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}
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}
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luaL_pushresult(&b);
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}
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return 1;
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}
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LJLIB_CF(os_time)
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{
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time_t t;
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if (lua_isnoneornil(L, 1)) { /* called without args? */
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t = time(NULL); /* get current time */
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} else {
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struct tm ts;
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luaL_checktype(L, 1, LUA_TTABLE);
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lua_settop(L, 1); /* make sure table is at the top */
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ts.tm_sec = getfield(L, "sec", 0);
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ts.tm_min = getfield(L, "min", 0);
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ts.tm_hour = getfield(L, "hour", 12);
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ts.tm_mday = getfield(L, "day", -1);
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ts.tm_mon = getfield(L, "month", -1) - 1;
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ts.tm_year = getfield(L, "year", -1) - 1900;
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ts.tm_isdst = getboolfield(L, "isdst");
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t = mktime(&ts);
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}
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if (t == (time_t)(-1))
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lua_pushnil(L);
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else
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lua_pushnumber(L, (lua_Number)t);
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return 1;
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}
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LJLIB_CF(os_difftime)
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{
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lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
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(time_t)(luaL_optnumber(L, 2, (lua_Number)0))));
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return 1;
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}
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/* ------------------------------------------------------------------------ */
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LJLIB_CF(os_setlocale)
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{
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#if LJ_TARGET_PSVITA
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lua_pushliteral(L, "C");
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#else
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GCstr *s = lj_lib_optstr(L, 1);
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const char *str = s ? strdata(s) : NULL;
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int opt = lj_lib_checkopt(L, 2, 6,
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"\5ctype\7numeric\4time\7collate\10monetary\1\377\3all");
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if (opt == 0) opt = LC_CTYPE;
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else if (opt == 1) opt = LC_NUMERIC;
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else if (opt == 2) opt = LC_TIME;
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else if (opt == 3) opt = LC_COLLATE;
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else if (opt == 4) opt = LC_MONETARY;
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else if (opt == 6) opt = LC_ALL;
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lua_pushstring(L, setlocale(opt, str));
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#endif
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return 1;
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}
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/* ------------------------------------------------------------------------ */
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#include "lj_libdef.h"
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LUALIB_API int luaopen_os(lua_State *L)
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{
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LJ_LIB_REG(L, LUA_OSLIBNAME, os);
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return 1;
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}
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