1 files changed, 249 insertions, 0 deletions

diff --git a/src/lib_os.c b/src/lib_os.c
new file mode 100644
index 00000000..bee7216a
--- /dev/null
+++ b/src/lib_os.c
@@ -0,0 +1,249 @@
+/*
+** OS library.
+** Copyright (C) 2005-2009 Mike Pall. See Copyright Notice in luajit.h
+**
+** Major portions taken verbatim or adapted from the Lua interpreter.
+** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
+*/
+
+#include <errno.h>
+#include <locale.h>
+#include <time.h>
+
+#define lib_os_c
+#define LUA_LIB
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+
+#ifdef LUA_USE_POSIX
+#include <unistd.h>
+#else
+#include <stdio.h>
+#endif
+
+#include "lj_obj.h"
+#include "lj_err.h"
+#include "lj_lib.h"
+
+/* ------------------------------------------------------------------------ */
+
+#define LJLIB_MODULE_os
+
+static int os_pushresult(lua_State *L, int i, const char *filename)
+{
+  int en = errno;  /* calls to Lua API may change this value */
+  if (i) {
+    setboolV(L->top-1, 1);
+    return 1;
+  } else {
+    setnilV(L->top-1);
+    lua_pushfstring(L, "%s: %s", filename, strerror(en));
+    lua_pushinteger(L, en);
+    return 3;
+  }
+}
+
+LJLIB_CF(os_execute)
+{
+  lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
+  return 1;
+}
+
+LJLIB_CF(os_remove)
+{
+  const char *filename = luaL_checkstring(L, 1);
+  return os_pushresult(L, remove(filename) == 0, filename);
+}
+
+LJLIB_CF(os_rename)
+{
+  const char *fromname = luaL_checkstring(L, 1);
+  const char *toname = luaL_checkstring(L, 2);
+  return os_pushresult(L, rename(fromname, toname) == 0, fromname);
+}
+
+LJLIB_CF(os_tmpname)
+{
+#ifdef LUA_USE_POSIX
+  char buf[15+1];
+  int fp;
+  strcpy(buf, "/tmp/lua_XXXXXX");
+  fp = mkstemp(buf);
+  if (fp != -1)
+    close(fp);
+  else
+    lj_err_caller(L, LJ_ERR_OSUNIQF);
+#else
+  char buf[L_tmpnam];
+  if (tmpnam(buf) == NULL)
+    lj_err_caller(L, LJ_ERR_OSUNIQF);
+#endif
+  lua_pushstring(L, buf);
+  return 1;
+}
+
+LJLIB_CF(os_getenv)
+{
+  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
+  return 1;
+}
+
+LJLIB_CF(os_exit)
+{
+  exit(lj_lib_optint(L, 1, EXIT_SUCCESS));
+  return 0;  /* to avoid warnings */
+}
+
+LJLIB_CF(os_clock)
+{
+  setnumV(L->top++, ((lua_Number)clock())*(1.0/(lua_Number)CLOCKS_PER_SEC));
+  return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static void setfield(lua_State *L, const char *key, int value)
+{
+  lua_pushinteger(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static void setboolfield(lua_State *L, const char *key, int value)
+{
+  if (value < 0)  /* undefined? */
+    return;  /* does not set field */
+  lua_pushboolean(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static int getboolfield(lua_State *L, const char *key)
+{
+  int res;
+  lua_getfield(L, -1, key);
+  res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
+  lua_pop(L, 1);
+  return res;
+}
+
+static int getfield(lua_State *L, const char *key, int d)
+{
+  int res;
+  lua_getfield(L, -1, key);
+  if (lua_isnumber(L, -1)) {
+    res = (int)lua_tointeger(L, -1);
+  } else {
+    if (d < 0)
+      lj_err_callerv(L, LJ_ERR_OSDATEF, key);
+    res = d;
+  }
+  lua_pop(L, 1);
+  return res;
+}
+
+LJLIB_CF(os_date)
+{
+  const char *s = luaL_optstring(L, 1, "%c");
+  time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
+  struct tm *stm;
+  if (*s == '!') {  /* UTC? */
+    stm = gmtime(&t);
+    s++;  /* skip `!' */
+  } else {
+    stm = localtime(&t);
+  }
+  if (stm == NULL) {  /* invalid date? */
+    setnilV(L->top-1);
+  } else if (strcmp(s, "*t") == 0) {
+    lua_createtable(L, 0, 9);  /* 9 = number of fields */
+    setfield(L, "sec", stm->tm_sec);
+    setfield(L, "min", stm->tm_min);
+    setfield(L, "hour", stm->tm_hour);
+    setfield(L, "day", stm->tm_mday);
+    setfield(L, "month", stm->tm_mon+1);
+    setfield(L, "year", stm->tm_year+1900);
+    setfield(L, "wday", stm->tm_wday+1);
+    setfield(L, "yday", stm->tm_yday+1);
+    setboolfield(L, "isdst", stm->tm_isdst);
+  } else {
+    char cc[3];
+    luaL_Buffer b;
+    cc[0] = '%'; cc[2] = '\0';
+    luaL_buffinit(L, &b);
+    for (; *s; s++) {
+      if (*s != '%' || *(s + 1) == '\0') {  /* no conversion specifier? */
+        luaL_addchar(&b, *s);
+      } else {
+        size_t reslen;
+        char buff[200];  /* should be big enough for any conversion result */
+        cc[1] = *(++s);
+        reslen = strftime(buff, sizeof(buff), cc, stm);
+        luaL_addlstring(&b, buff, reslen);
+      }
+    }
+    luaL_pushresult(&b);
+  }
+  return 1;
+}
+
+LJLIB_CF(os_time)
+{
+  time_t t;
+  if (lua_isnoneornil(L, 1)) {  /* called without args? */
+    t = time(NULL);  /* get current time */
+  } else {
+    struct tm ts;
+    luaL_checktype(L, 1, LUA_TTABLE);
+    lua_settop(L, 1);  /* make sure table is at the top */
+    ts.tm_sec = getfield(L, "sec", 0);
+    ts.tm_min = getfield(L, "min", 0);
+    ts.tm_hour = getfield(L, "hour", 12);
+    ts.tm_mday = getfield(L, "day", -1);
+    ts.tm_mon = getfield(L, "month", -1) - 1;
+    ts.tm_year = getfield(L, "year", -1) - 1900;
+    ts.tm_isdst = getboolfield(L, "isdst");
+    t = mktime(&ts);
+  }
+  if (t == (time_t)(-1))
+    lua_pushnil(L);
+  else
+    lua_pushnumber(L, (lua_Number)t);
+  return 1;
+}
+
+LJLIB_CF(os_difftime)
+{
+  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+                             (time_t)(luaL_optnumber(L, 2, (lua_Number)0))));
+  return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+LJLIB_CF(os_setlocale)
+{
+  GCstr *s = lj_lib_optstr(L, 1);
+  const char *str = s ? strdata(s) : NULL;
+  int opt = lj_lib_checkopt(L, 2, 6,
+    "\5ctype\7numeric\4time\7collate\10monetary\1\377\3all");
+  if (opt == 0) opt = LC_CTYPE;
+  else if (opt == 1) opt = LC_NUMERIC;
+  else if (opt == 2) opt = LC_TIME;
+  else if (opt == 3) opt = LC_COLLATE;
+  else if (opt == 4) opt = LC_MONETARY;
+  else if (opt == 6) opt = LC_ALL;
+  lua_pushstring(L, setlocale(opt, str));
+  return 1;
+}
+
+/* ------------------------------------------------------------------------ */
+
+#include "lj_libdef.h"
+
+LUALIB_API int luaopen_os(lua_State *L)
+{
+  LJ_LIB_REG(L, os);
+  return 1;
+}
+