AppPkg: Add the Lua interpreter and library.

[mirror_edk2.git] / AppPkg / Applications / Lua / src / loslib.c

/*\r
** $Id: loslib.c,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $\r
** Standard Operating System library\r
** See Copyright Notice in lua.h\r
*/\r
\r
\r
#include <errno.h>\r
#include <locale.h>\r
#include <stdlib.h>\r
#include <string.h>\r
#include <time.h>\r
\r
#define loslib_c\r
#define LUA_LIB\r
\r
#include "lua.h"\r
\r
#include "lauxlib.h"\r
#include "lualib.h"\r
\r
\r
/*\r
** list of valid conversion specifiers for the 'strftime' function\r
*/\r
#if !defined(LUA_STRFTIMEOPTIONS)\r
\r
#if !defined(LUA_USE_POSIX)\r
#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }\r
#else\r
#define LUA_STRFTIMEOPTIONS \\r
  { "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \\r
    "", "E", "cCxXyY",  \\r
    "O", "deHImMSuUVwWy" }\r
#endif\r
\r
#endif\r
\r
\r
\r
/*\r
** By default, Lua uses tmpnam except when POSIX is available, where it\r
** uses mkstemp.\r
*/\r
#if defined(LUA_USE_MKSTEMP)\r
#include <unistd.h>\r
#define LUA_TMPNAMBUFSIZE 32\r
#define lua_tmpnam(b,e) { \\r
        strcpy(b, "/tmp/lua_XXXXXX"); \\r
        e = mkstemp(b); \\r
        if (e != -1) close(e); \\r
        e = (e == -1); }\r
\r
#elif !defined(lua_tmpnam)\r
\r
#define LUA_TMPNAMBUFSIZE L_tmpnam\r
#define lua_tmpnam(b,e)   { e = (tmpnam(b) == NULL); }\r
\r
#endif\r
\r
\r
/*\r
** By default, Lua uses gmtime/localtime, except when POSIX is available,\r
** where it uses gmtime_r/localtime_r\r
*/\r
#if defined(LUA_USE_GMTIME_R)\r
\r
#define l_gmtime(t,r)   gmtime_r(t,r)\r
#define l_localtime(t,r)  localtime_r(t,r)\r
\r
#elif !defined(l_gmtime)\r
\r
#define l_gmtime(t,r)   ((void)r, gmtime(t))\r
#define l_localtime(t,r)    ((void)r, localtime(t))\r
\r
#endif\r
\r
\r
\r
static int os_execute (lua_State *L) {\r
  const char *cmd = luaL_optstring(L, 1, NULL);\r
  int stat = system(cmd);\r
  if (cmd != NULL)\r
    return luaL_execresult(L, stat);\r
  else {\r
    lua_pushboolean(L, stat);  /* true if there is a shell */\r
    return 1;\r
  }\r
}\r
\r
\r
static int os_remove (lua_State *L) {\r
  const char *filename = luaL_checkstring(L, 1);\r
  return luaL_fileresult(L, remove(filename) == 0, filename);\r
}\r
\r
\r
static int os_rename (lua_State *L) {\r
  const char *fromname = luaL_checkstring(L, 1);\r
  const char *toname = luaL_checkstring(L, 2);\r
  return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);\r
}\r
\r
\r
static int os_tmpname (lua_State *L) {\r
  char buff[LUA_TMPNAMBUFSIZE];\r
  int err;\r
  lua_tmpnam(buff, err);\r
  if (err)\r
    return luaL_error(L, "unable to generate a unique filename");\r
  lua_pushstring(L, buff);\r
  return 1;\r
}\r
\r
\r
static int os_getenv (lua_State *L) {\r
  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */\r
  return 1;\r
}\r
\r
\r
static int os_clock (lua_State *L) {\r
  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);\r
  return 1;\r
}\r
\r
\r
/*\r
** {======================================================\r
** Time/Date operations\r
** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,\r
**   wday=%w+1, yday=%j, isdst=? }\r
** =======================================================\r
*/\r
\r
static void setfield (lua_State *L, const char *key, int value) {\r
  lua_pushinteger(L, value);\r
  lua_setfield(L, -2, key);\r
}\r
\r
static void setboolfield (lua_State *L, const char *key, int value) {\r
  if (value < 0)  /* undefined? */\r
    return;  /* does not set field */\r
  lua_pushboolean(L, value);\r
  lua_setfield(L, -2, key);\r
}\r
\r
static int getboolfield (lua_State *L, const char *key) {\r
  int res;\r
  lua_getfield(L, -1, key);\r
  res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);\r
  lua_pop(L, 1);\r
  return res;\r
}\r
\r
\r
static int getfield (lua_State *L, const char *key, int d) {\r
  int res, isnum;\r
  lua_getfield(L, -1, key);\r
  res = (int)lua_tointegerx(L, -1, &isnum);\r
  if (!isnum) {\r
    if (d < 0)\r
      return luaL_error(L, "field " LUA_QS " missing in date table", key);\r
    res = d;\r
  }\r
  lua_pop(L, 1);\r
  return res;\r
}\r
\r
\r
static const char *checkoption (lua_State *L, const char *conv, char *buff) {\r
  static const char *const options[] = LUA_STRFTIMEOPTIONS;\r
  unsigned int i;\r
  for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {\r
    if (*conv != '\0' && strchr(options[i], *conv) != NULL) {\r
      buff[1] = *conv;\r
      if (*options[i + 1] == '\0') {  /* one-char conversion specifier? */\r
        buff[2] = '\0';  /* end buffer */\r
        return conv + 1;\r
      }\r
      else if (*(conv + 1) != '\0' &&\r
               strchr(options[i + 1], *(conv + 1)) != NULL) {\r
        buff[2] = *(conv + 1);  /* valid two-char conversion specifier */\r
        buff[3] = '\0';  /* end buffer */\r
        return conv + 2;\r
      }\r
    }\r
  }\r
  luaL_argerror(L, 1,\r
    lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));\r
  return conv;  /* to avoid warnings */\r
}\r
\r
\r
static int os_date (lua_State *L) {\r
  const char *s = luaL_optstring(L, 1, "%c");\r
  time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));\r
  struct tm tmr, *stm;\r
  if (*s == '!') {  /* UTC? */\r
    stm = l_gmtime(&t, &tmr);\r
    s++;  /* skip `!' */\r
  }\r
  else\r
    stm = l_localtime(&t, &tmr);\r
  if (stm == NULL)  /* invalid date? */\r
    lua_pushnil(L);\r
  else if (strcmp(s, "*t") == 0) {\r
    lua_createtable(L, 0, 9);  /* 9 = number of fields */\r
    setfield(L, "sec", stm->tm_sec);\r
    setfield(L, "min", stm->tm_min);\r
    setfield(L, "hour", stm->tm_hour);\r
    setfield(L, "day", stm->tm_mday);\r
    setfield(L, "month", stm->tm_mon+1);\r
    setfield(L, "year", stm->tm_year+1900);\r
    setfield(L, "wday", stm->tm_wday+1);\r
    setfield(L, "yday", stm->tm_yday+1);\r
    setboolfield(L, "isdst", stm->tm_isdst);\r
  }\r
  else {\r
    char cc[4];\r
    luaL_Buffer b;\r
    cc[0] = '%';\r
    luaL_buffinit(L, &b);\r
    while (*s) {\r
      if (*s != '%')  /* no conversion specifier? */\r
        luaL_addchar(&b, *s++);\r
      else {\r
        size_t reslen;\r
        char buff[200];  /* should be big enough for any conversion result */\r
        s = checkoption(L, s + 1, cc);\r
        reslen = strftime(buff, sizeof(buff), cc, stm);\r
        luaL_addlstring(&b, buff, reslen);\r
      }\r
    }\r
    luaL_pushresult(&b);\r
  }\r
  return 1;\r
}\r
\r
\r
static int os_time (lua_State *L) {\r
  time_t t;\r
  if (lua_isnoneornil(L, 1))  /* called without args? */\r
    t = time(NULL);  /* get current time */\r
  else {\r
    struct tm ts;\r
    luaL_checktype(L, 1, LUA_TTABLE);\r
    lua_settop(L, 1);  /* make sure table is at the top */\r
    ts.tm_sec = getfield(L, "sec", 0);\r
    ts.tm_min = getfield(L, "min", 0);\r
    ts.tm_hour = getfield(L, "hour", 12);\r
    ts.tm_mday = getfield(L, "day", -1);\r
    ts.tm_mon = getfield(L, "month", -1) - 1;\r
    ts.tm_year = getfield(L, "year", -1) - 1900;\r
    ts.tm_isdst = getboolfield(L, "isdst");\r
    t = mktime(&ts);\r
  }\r
  if (t == (time_t)(-1))\r
    lua_pushnil(L);\r
  else\r
    lua_pushnumber(L, (lua_Number)t);\r
  return 1;\r
}\r
\r
\r
static int os_difftime (lua_State *L) {\r
  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),\r
                             (time_t)(luaL_optnumber(L, 2, 0))));\r
  return 1;\r
}\r
\r
/* }====================================================== */\r
\r
\r
static int os_setlocale (lua_State *L) {\r
  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,\r
                      LC_NUMERIC, LC_TIME};\r
  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",\r
     "numeric", "time", NULL};\r
  const char *l = luaL_optstring(L, 1, NULL);\r
  int op = luaL_checkoption(L, 2, "all", catnames);\r
  lua_pushstring(L, setlocale(cat[op], l));\r
  return 1;\r
}\r
\r
\r
static int os_exit (lua_State *L) {\r
  int status;\r
  if (lua_isboolean(L, 1))\r
    status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);\r
  else\r
    status = luaL_optint(L, 1, EXIT_SUCCESS);\r
  if (lua_toboolean(L, 2))\r
    lua_close(L);\r
  if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */\r
  return 0;\r
}\r
\r
\r
static const luaL_Reg syslib[] = {\r
  {"clock",     os_clock},\r
  {"date",      os_date},\r
  {"difftime",  os_difftime},\r
  {"execute",   os_execute},\r
  {"exit",      os_exit},\r
  {"getenv",    os_getenv},\r
  {"remove",    os_remove},\r
  {"rename",    os_rename},\r
  {"setlocale", os_setlocale},\r
  {"time",      os_time},\r
  {"tmpname",   os_tmpname},\r
  {NULL, NULL}\r
};\r
\r
/* }====================================================== */\r
\r
\r
\r
LUAMOD_API int luaopen_os (lua_State *L) {\r
  luaL_newlib(L, syslib);\r
  return 1;\r
}\r
\r