lbaselib.c-Dateireferenz

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <script.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"

Include-Abhängigkeitsdiagramm für lbaselib.c:

gehe zum Quellcode dieser Datei

Makrodefinitionen
#define	lbaselib_c
#define	LUA_LIB

Funktionen
static int	luaB_print (lua_State *L)
static int	luaB_tonumber (lua_State *L)
static int	luaB_error (lua_State *L)
static int	luaB_getmetatable (lua_State *L)
static int	luaB_setmetatable (lua_State *L)
static void	getfunc (lua_State *L, int opt)
static int	luaB_getfenv (lua_State *L)
static int	luaB_setfenv (lua_State *L)
static int	luaB_rawequal (lua_State *L)
static int	luaB_rawget (lua_State *L)
static int	luaB_rawset (lua_State *L)
static int	luaB_gcinfo (lua_State *L)
static int	luaB_collectgarbage (lua_State *L)
static int	luaB_type (lua_State *L)
static int	luaB_next (lua_State *L)
static int	luaB_pairs (lua_State *L)
static int	ipairsaux (lua_State *L)
static int	luaB_ipairs (lua_State *L)
static int	load_aux (lua_State *L, int status)
static int	luaB_loadstring (lua_State *L)
static int	luaB_loadfile (lua_State *L)
static const char *	generic_reader (lua_State *L, void *ud, size_t *size)
static int	luaB_load (lua_State *L)
static int	luaB_dofile (lua_State *L)
static int	luaB_assert (lua_State *L)
static int	luaB_unpack (lua_State *L)
static int	luaB_select (lua_State *L)
static int	luaB_pcall (lua_State *L)
static int	luaB_xpcall (lua_State *L)
static int	luaB_tostring (lua_State *L)
static int	luaB_newproxy (lua_State *L)
static void	auxopen (lua_State *L, const char *name, lua_CFunction f, lua_CFunction u)
static void	base_open (lua_State *L)
LUALIB_API int	luaopen_base (lua_State *L)

Variablen
static const luaL_Reg	base_funcs []

Makro-Dokumentation

#define lbaselib_c

Definiert in Zeile 17 der Datei lbaselib.c.

#define LUA_LIB

Definiert in Zeile 18 der Datei lbaselib.c.

Dokumentation der Funktionen

static void auxopen ( lua_State *  L, const char *  name, lua_CFunction  f, lua_CFunction  u  )

static

Definiert in Zeile 655 der Datei lbaselib.c.

                                                       {
  lua_pushcfunction(L, u);
  lua_pushcclosure(L, f, 1);
  lua_setfield(L, -2, name);
}

static void base_open ( lua_State *  L)

static

Definiert in Zeile 663 der Datei lbaselib.c.

                                     {
  /* set global _G */
  lua_pushvalue(L, LUA_GLOBALSINDEX);
  lua_setglobal(L, "_G");
  /* open lib into global table */
  luaL_register(L, "_G", base_funcs);
  lua_pushliteral(L, LUA_VERSION);
  lua_setglobal(L, "_VERSION");  /* set global _VERSION */
  /* `ipairs' and `pairs' need auxiliary functions as upvalues */
  auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
  auxopen(L, "pairs", luaB_pairs, luaB_next);
  /* `newproxy' needs a weaktable as upvalue */
  lua_createtable(L, 0, 1);  /* new table `w' */
  lua_pushvalue(L, -1);  /* `w' will be its own metatable */
  lua_setmetatable(L, -2);
  lua_pushliteral(L, "kv");
  lua_setfield(L, -2, "__mode");  /* metatable(w).__mode = "kv" */
  lua_pushcclosure(L, luaB_newproxy, 1);
  lua_setglobal(L, "newproxy");  /* set global `newproxy' */
}

static const char* generic_reader ( lua_State *  L, void *  ud, size_t *  size  )

static

Definiert in Zeile 330 der Datei lbaselib.c.

                                                                         {
  (void)ud;  /* to avoid warnings */
  luaL_checkstack(L, 2, "too many nested functions");
  lua_pushvalue(L, 1);  /* get function */
  lua_call(L, 0, 1);  /* call it */
  if (lua_isnil(L, -1)) {
    *size = 0;
    return NULL;
  }
  else if (lua_isstring(L, -1)) {
    lua_replace(L, 3);  /* save string in a reserved stack slot */
    return lua_tolstring(L, 3, size);
  }
  else luaL_error(L, "reader function must return a string");
  return NULL;  /* to avoid warnings */
}

static void getfunc ( lua_State *  L, int  opt  )

static

Definiert in Zeile 150 der Datei lbaselib.c.

                                            {
  if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
  else {
    lua_Debug ar;
    int level = opt ? luaL_optint(L, 1, 1) : luaL_checkint(L, 1);
    luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
    if (lua_getstack(L, level, &ar) == 0)
      luaL_argerror(L, 1, "invalid level");
    lua_getinfo(L, "f", &ar);
    if (lua_isnil(L, -1))
      luaL_error(L, "no function environment for tail call at level %d",
                    level);
  }
}

static int ipairsaux ( lua_State *  L)

static

Definiert in Zeile 280 der Datei lbaselib.c.

                                    {
  int i = luaL_checkint(L, 2);
  luaL_checktype(L, 1, LUA_TTABLE);
  i++;  /* next value */
  lua_pushinteger(L, i);
  lua_rawgeti(L, 1, i);
  return (lua_isnil(L, -1)) ? 0 : 2;
}

static int load_aux ( lua_State *  L, int  status  )

static

Definiert in Zeile 299 der Datei lbaselib.c.

                                               {
  if (status == 0)  /* OK? */
    return 1;
  else {
    lua_pushnil(L);
    lua_insert(L, -2);  /* put before error message */
    return 2;  /* return nil plus error message */
  }
}

static int luaB_assert ( lua_State *  L)

static

Definiert in Zeile 367 der Datei lbaselib.c.

                                      {
  luaL_checkany(L, 1);
  if (!lua_toboolean(L, 1))
    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
  return lua_gettop(L);
}

static int luaB_collectgarbage ( lua_State *  L)

static

Definiert in Zeile 226 der Datei lbaselib.c.

                                              {
  static const char *const opts[] = {"stop", "restart", "collect",
    "count", "step", "setpause", "setstepmul", NULL};
  static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
    LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL};
  int o = luaL_checkoption(L, 1, "collect", opts);
  int ex = luaL_optint(L, 2, 0);
  int res = lua_gc(L, optsnum[o], ex);
  switch (optsnum[o]) {
    case LUA_GCCOUNT: {
      int b = lua_gc(L, LUA_GCCOUNTB, 0);
      lua_pushnumber(L, res + ((lua_Number)b/1024));
      return 1;
    }
    case LUA_GCSTEP: {
      lua_pushboolean(L, res);
      return 1;
    }
    default: {
      lua_pushnumber(L, res);
      return 1;
    }
  }
}

static int luaB_dofile ( lua_State *  L)

static

Definiert in Zeile 358 der Datei lbaselib.c.

                                      {
  const char *fname = luaL_optstring(L, 1, NULL);
  int n = lua_gettop(L);
  if (luaL_loadfile(L, fname) != 0) lua_error(L);
  lua_call(L, 0, LUA_MULTRET);
  return lua_gettop(L) - n;
}

static int luaB_error ( lua_State *  L)

static

Definiert in Zeile 114 der Datei lbaselib.c.

                                     {
  int level = luaL_optint(L, 2, 1);
  lua_settop(L, 1);
  if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
    luaL_where(L, level);
    lua_pushvalue(L, 1);
    lua_concat(L, 2);
  }
  return lua_error(L);
}

static int luaB_gcinfo ( lua_State *  L)

static

Definiert in Zeile 220 der Datei lbaselib.c.

                                      {
  lua_pushinteger(L, lua_getgccount(L));
  return 1;
}

static int luaB_getfenv ( lua_State *  L)

static

Definiert in Zeile 166 der Datei lbaselib.c.

                                       {
  getfunc(L, 1);
  if (lua_iscfunction(L, -1))  /* is a C function? */
    lua_pushvalue(L, LUA_GLOBALSINDEX);  /* return the thread's global env. */
  else
    lua_getfenv(L, -1);
  return 1;
}

static int luaB_getmetatable ( lua_State *  L)

static

Definiert in Zeile 126 der Datei lbaselib.c.

                                            {
  luaL_checkany(L, 1);
  if (!lua_getmetatable(L, 1)) {
    lua_pushnil(L);
    return 1;  /* no metatable */
  }
  luaL_getmetafield(L, 1, "__metatable");
  return 1;  /* returns either __metatable field (if present) or metatable */
}

static int luaB_ipairs ( lua_State *  L)

static

Definiert in Zeile 290 der Datei lbaselib.c.

                                      {
  luaL_checktype(L, 1, LUA_TTABLE);
  lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
  lua_pushvalue(L, 1);  /* state, */
  lua_pushinteger(L, 0);  /* and initial value */
  return 3;
}

static int luaB_load ( lua_State *  L)

static

Definiert in Zeile 348 der Datei lbaselib.c.

                                    {
  int status;
  const char *cname = luaL_optstring(L, 2, "=(load)");
  luaL_checktype(L, 1, LUA_TFUNCTION);
  lua_settop(L, 3);  /* function, eventual name, plus one reserved slot */
  status = lua_load(L, generic_reader, NULL, cname);
  return load_aux(L, status);
}

static int luaB_loadfile ( lua_State *  L)

static

Definiert in Zeile 318 der Datei lbaselib.c.

                                        {
  const char *fname = luaL_optstring(L, 1, NULL);
  return load_aux(L, luaL_loadfile(L, fname));
}

static int luaB_loadstring ( lua_State *  L)

static

Definiert in Zeile 310 der Datei lbaselib.c.

                                          {
  size_t l;
  const char *s = luaL_checklstring(L, 1, &l);
  const char *chunkname = luaL_optstring(L, 2, s);
  return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
}

static int luaB_newproxy ( lua_State *  L)

static

Definiert in Zeile 454 der Datei lbaselib.c.

                                        {
  lua_settop(L, 1);
  lua_newuserdata(L, 0);  /* create proxy */
  if (lua_toboolean(L, 1) == 0)
    return 1;  /* no metatable */
  else if (lua_isboolean(L, 1)) {
    lua_newtable(L);  /* create a new metatable `m' ... */
    lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */
    lua_pushboolean(L, 1);
    lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */
  }
  else {
    int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */
    if (lua_getmetatable(L, 1)) {
      lua_rawget(L, lua_upvalueindex(1));
      validproxy = lua_toboolean(L, -1);
      lua_pop(L, 1);  /* remove value */
    }
    luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
    lua_getmetatable(L, 1);  /* metatable is valid; get it */
  }
  lua_setmetatable(L, 2);
  return 1;
}

static int luaB_next ( lua_State *  L)

static

Definiert in Zeile 259 der Datei lbaselib.c.

                                    {
  luaL_checktype(L, 1, LUA_TTABLE);
  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
  if (lua_next(L, 1))
    return 2;
  else {
    lua_pushnil(L);
    return 1;
  }
}

static int luaB_pairs ( lua_State *  L)

static

Definiert in Zeile 271 der Datei lbaselib.c.

                                     {
  luaL_checktype(L, 1, LUA_TTABLE);
  lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
  lua_pushvalue(L, 1);  /* state, */
  lua_pushnil(L);  /* and initial value */
  return 3;
}

static int luaB_pcall ( lua_State *  L)

static

Definiert in Zeile 407 der Datei lbaselib.c.

                                     {
  int status;
  luaL_checkany(L, 1);
  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
  lua_pushboolean(L, (status == 0));
  lua_insert(L, 1);
  return lua_gettop(L);  /* return status + all results */
}

static int luaB_print ( lua_State *  L)

static

Definiert in Zeile 34 der Datei lbaselib.c.

                                     {
  int n = lua_gettop(L);  /* number of arguments */
  int i;
  lua_getglobal(L, "tostring");
  char buf[128];
  const int max_buf_chars=sizeof(buf)-1;
  char numbuf[16];
  buf[0] = 0;
  int buf_chars = 0;
  for (i=1; i<=n; i++) {
    const char *s;
    /* avoid calling tostring on numbers, so we don't
     generate new string for each unique number */
    if(lua_type(L,i) == LUA_TNUMBER) {
      sprintf(numbuf,LUA_NUMBER_FMT,lua_tonumber(L,i));
      s=numbuf;
    }
    else {
      lua_pushvalue(L, -1);  /* function to be called */
      lua_pushvalue(L, i);   /* value to print */
      lua_call(L, 1, 1);
      s = lua_tostring(L, -1);  /* get result */
      if (s == NULL)
        return luaL_error(L, LUA_QL("tostring") " must return a string to "
                          LUA_QL("print"));
      lua_pop(L, 1);  /* pop result */
    }
    if(i>1) {
      strcpy(buf+buf_chars," ");
      ++buf_chars;
    }
    if(buf_chars+strlen(s) >= max_buf_chars) {
      strncpy(buf+buf_chars,s,max_buf_chars-buf_chars);
      buf[max_buf_chars]=0;
      break;
    }
    strcpy(buf+buf_chars,s);
    buf_chars = strlen(buf);
    if(buf_chars >= max_buf_chars-1) // -1 allow for space
       break;

  }
#ifdef HOST_LUA
  fprintf(stdout,"%s\n",buf);
#else
  script_console_add_line((long)buf);
#endif

  return 0;
}

static int luaB_rawequal ( lua_State *  L)

static

Definiert in Zeile 194 der Datei lbaselib.c.

                                        {
  luaL_checkany(L, 1);
  luaL_checkany(L, 2);
  lua_pushboolean(L, lua_rawequal(L, 1, 2));
  return 1;
}

static int luaB_rawget ( lua_State *  L)

static

Definiert in Zeile 202 der Datei lbaselib.c.

                                      {
  luaL_checktype(L, 1, LUA_TTABLE);
  luaL_checkany(L, 2);
  lua_settop(L, 2);
  lua_rawget(L, 1);
  return 1;
}

static int luaB_rawset ( lua_State *  L)

static

Definiert in Zeile 210 der Datei lbaselib.c.

                                      {
  luaL_checktype(L, 1, LUA_TTABLE);
  luaL_checkany(L, 2);
  luaL_checkany(L, 3);
  lua_settop(L, 3);
  lua_rawset(L, 1);
  return 1;
}

static int luaB_select ( lua_State *  L)

static

Definiert in Zeile 391 der Datei lbaselib.c.

                                      {
  int n = lua_gettop(L);
  if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
    lua_pushinteger(L, n-1);
    return 1;
  }
  else {
    int i = luaL_checkint(L, 1);
    if (i < 0) i = n + i;
    else if (i > n) i = n;
    luaL_argcheck(L, 1 <= i, 1, "index out of range");
    return n - i;
  }
}

static int luaB_setfenv ( lua_State *  L)

static

Definiert in Zeile 176 der Datei lbaselib.c.

                                       {
  luaL_checktype(L, 2, LUA_TTABLE);
  getfunc(L, 0);
  lua_pushvalue(L, 2);
  if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
    /* change environment of current thread */
    lua_pushthread(L);
    lua_insert(L, -2);
    lua_setfenv(L, -2);
    return 0;
  }
  else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
    luaL_error(L,
          LUA_QL("setfenv") " cannot change environment of given object");
  return 1;
}

static int luaB_setmetatable ( lua_State *  L)

static

Definiert in Zeile 137 der Datei lbaselib.c.

                                            {
  int t = lua_type(L, 2);
  luaL_checktype(L, 1, LUA_TTABLE);
  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
                    "nil or table expected");
  if (luaL_getmetafield(L, 1, "__metatable"))
    luaL_error(L, "cannot change a protected metatable");
  lua_settop(L, 2);
  lua_setmetatable(L, 1);
  return 1;
}

static int luaB_tonumber ( lua_State *  L)

static

Definiert in Zeile 86 der Datei lbaselib.c.

                                        {
  int base = luaL_optint(L, 2, 10);
  if (base == 10) {  /* standard conversion */
    luaL_checkany(L, 1);
    if (lua_isnumber(L, 1)) {
      lua_pushnumber(L, lua_tonumber(L, 1));
      return 1;
    }
  }
  else {
    const char *s1 = luaL_checkstring(L, 1);
    char *s2;
    unsigned long n;
    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
    n = strtoul(s1, &s2, base);
    if (s1 != s2) {  /* at least one valid digit? */
      while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
      if (*s2 == '\0') {  /* no invalid trailing characters? */
        lua_pushnumber(L, (lua_Number)n);
        return 1;
      }
    }
  }
  lua_pushnil(L);  /* else not a number */
  return 1;
}

static int luaB_tostring ( lua_State *  L)

static

Definiert in Zeile 429 der Datei lbaselib.c.

                                        {
  luaL_checkany(L, 1);
  if (luaL_callmeta(L, 1, "__tostring"))  /* is there a metafield? */
    return 1;  /* use its value */
  switch (lua_type(L, 1)) {
    case LUA_TNUMBER:
      lua_pushstring(L, lua_tostring(L, 1));
      break;
    case LUA_TSTRING:
      lua_pushvalue(L, 1);
      break;
    case LUA_TBOOLEAN:
      lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
      break;
    case LUA_TNIL:
      lua_pushliteral(L, "nil");
      break;
    default:
      lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1));
      break;
  }
  return 1;
}

static int luaB_type ( lua_State *  L)

static

Definiert in Zeile 252 der Datei lbaselib.c.

                                    {
  luaL_checkany(L, 1);
  lua_pushstring(L, luaL_typename(L, 1));
  return 1;
}

static int luaB_unpack ( lua_State *  L)

static

Definiert in Zeile 375 der Datei lbaselib.c.

                                      {
  int i, e, n;
  luaL_checktype(L, 1, LUA_TTABLE);
  i = luaL_optint(L, 2, 1);
  e = luaL_opt(L, luaL_checkint, 3, luaL_getn(L, 1));
  if (i > e) return 0;  /* empty range */
  n = e - i + 1;  /* number of elements */
  if (n <= 0 || !lua_checkstack(L, n))  /* n <= 0 means arith. overflow */
    return luaL_error(L, "too many results to unpack");
  lua_rawgeti(L, 1, i);  /* push arg[i] (avoiding overflow problems) */
  while (i++ < e)  /* push arg[i + 1...e] */
    lua_rawgeti(L, 1, i);
  return n;
}

static int luaB_xpcall ( lua_State *  L)

static

Definiert in Zeile 417 der Datei lbaselib.c.

                                      {
  int status;
  luaL_checkany(L, 2);
  lua_settop(L, 2);
  lua_insert(L, 1);  /* put error function under function to be called */
  status = lua_pcall(L, 0, LUA_MULTRET, 1);
  lua_pushboolean(L, (status == 0));
  lua_replace(L, 1);
  return lua_gettop(L);  /* return status + all results */
}

LUALIB_API int luaopen_base

(

lua_State *

L)

Definiert in Zeile 685 der Datei lbaselib.c.

                                           {
  base_open(L);
// CHDK - disable coroutine lib
#ifdef HOST_LUA
  luaL_register(L, LUA_COLIBNAME, co_funcs);
#endif
  return 2;
}

Variablen-Dokumentation

const luaL_Reg base_funcs[]

static

Initialisierung:

= {
  {"assert", luaB_assert},
  {"collectgarbage", luaB_collectgarbage},
  {"dofile", luaB_dofile},
  {"error", luaB_error},
  {"gcinfo", luaB_gcinfo},
  {"getfenv", luaB_getfenv},
  {"getmetatable", luaB_getmetatable},
  {"loadfile", luaB_loadfile},
  {"load", luaB_load},
  {"loadstring", luaB_loadstring},
  {"next", luaB_next},
  {"pcall", luaB_pcall},
  {"print", luaB_print},
  {"rawequal", luaB_rawequal},
  {"rawget", luaB_rawget},
  {"rawset", luaB_rawset},
  {"select", luaB_select},
  {"setfenv", luaB_setfenv},
  {"setmetatable", luaB_setmetatable},
  {"tonumber", luaB_tonumber},
  {"tostring", luaB_tostring},
  {"type", luaB_type},
  {"unpack", luaB_unpack},
  {"xpcall", luaB_xpcall},
  {NULL, NULL}
}

Definiert in Zeile 480 der Datei lbaselib.c.