示例#1
0
static int luaB_tostring (lua_State *L) {
  luaL_checkany(L, 1);
  luaL_tolstring(L, 1, NULL);
  return 1;
}
示例#2
0
static int str_format (lua_State *L) {
  int top = lua_gettop(L);
  int arg = 1;
  size_t sfl;
  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
  const char *strfrmt_end = strfrmt+sfl;
  luaL_Buffer b;
  luaL_buffinit(L, &b);
  while (strfrmt < strfrmt_end) {
    if (*strfrmt != L_ESC)
      luaL_addchar(&b, *strfrmt++);
    else if (*++strfrmt == L_ESC)
      luaL_addchar(&b, *strfrmt++);  /* %% */
    else { /* format item */
      char form[MAX_FORMAT];  /* to store the format ('%...') */
      char *buff = luaL_prepbuffsize(&b, MAX_ITEM);  /* to put formatted item */
      int nb = 0;  /* number of bytes in added item */
      if (++arg > top)
        luaL_argerror(L, arg, "no value");
      strfrmt = scanformat(L, strfrmt, form);
      switch (*strfrmt++) {
        case 'c': {
          nb = l_sprintf(buff, MAX_ITEM, form, (int)luaL_checkinteger(L, arg));
          break;
        }
        case 'd': case 'i':
        case 'o': case 'u': case 'x': case 'X': {
          lua_Integer n = luaL_checkinteger(L, arg);
          addlenmod(form, LUA_INTEGER_FRMLEN);
          nb = l_sprintf(buff, MAX_ITEM, form, n);
          break;
        }
        case 'a': case 'A':
          addlenmod(form, LUA_NUMBER_FRMLEN);
          nb = lua_number2strx(L, buff, MAX_ITEM, form,
                                  luaL_checknumber(L, arg));
          break;
        case 'e': case 'E': case 'f':
        case 'g': case 'G': {
          addlenmod(form, LUA_NUMBER_FRMLEN);
          nb = l_sprintf(buff, MAX_ITEM, form, luaL_checknumber(L, arg));
          break;
        }
        case 'q': {
          addliteral(L, &b, arg);
          break;
        }
        case 's': {
          size_t l;
          const char *s = luaL_tolstring(L, arg, &l);
          if (form[2] == '\0')  /* no modifiers? */
            luaL_addvalue(&b);  /* keep entire string */
          else {
            luaL_argcheck(L, l == strlen(s), arg, "string contains zeros");
            if (!strchr(form, '.') && l >= 100) {
              /* no precision and string is too long to be formatted */
              luaL_addvalue(&b);  /* keep entire string */
            }
            else {  /* format the string into 'buff' */
              nb = l_sprintf(buff, MAX_ITEM, form, s);
              lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
            }
          }
          break;
        }
        default: {  /* also treat cases 'pnLlh' */
          return luaL_error(L, "invalid option '%%%c' to 'format'",
                               *(strfrmt - 1));
        }
      }
      lua_assert(nb < MAX_ITEM);
      luaL_addsize(&b, nb);
    }
  }
  luaL_pushresult(&b);
  return 1;
}
示例#3
0
static int str_format (lua_State *L) {
  int top = lua_gettop(L);
  int arg = 1;
  size_t sfl;
  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
  const char *strfrmt_end = strfrmt+sfl;
  luaL_Buffer b;
  luaL_buffinit(L, &b);
  while (strfrmt < strfrmt_end) {
    if (*strfrmt != L_ESC)
      luaL_addchar(&b, *strfrmt++);
    else if (*++strfrmt == L_ESC)
      luaL_addchar(&b, *strfrmt++);  /* %% */
    else { /* format item */
      char form[MAX_FORMAT];  /* to store the format (`%...') */
      char *buff = luaL_prepbuffsize(&b, MAX_ITEM);  /* to put formatted item */
      int nb = 0;  /* number of bytes in added item */
      if (++arg > top)
        luaL_argerror(L, arg, "no value");
      strfrmt = scanformat(L, strfrmt, form);
      switch (*strfrmt++) {
        case 'c': {
          nb = sprintf(buff, form, luaL_checkint(L, arg));
          break;
        }
        case 'd':  case 'i': {
          lua_Number n = luaL_checknumber(L, arg);
          LUA_INTFRM_T ni = (LUA_INTFRM_T)n;
          lua_Number diff = n - (lua_Number)ni;
          luaL_argcheck(L, -1 < diff && diff < 1, arg,
                        "not a number in proper range");
          addlenmod(form, LUA_INTFRMLEN);
          nb = sprintf(buff, form, ni);
          break;
        }
        case 'o':  case 'u':  case 'x':  case 'X': {
          lua_Number n = luaL_checknumber(L, arg);
          unsigned LUA_INTFRM_T ni = (unsigned LUA_INTFRM_T)n;
          lua_Number diff = n - (lua_Number)ni;
          luaL_argcheck(L, -1 < diff && diff < 1, arg,
                        "not a non-negative number in proper range");
          addlenmod(form, LUA_INTFRMLEN);
          nb = sprintf(buff, form, ni);
          break;
        }
        case 'e':  case 'E': case 'f':
#if defined(LUA_USE_AFORMAT)
        case 'a': case 'A':
#endif
        case 'g': case 'G': {
          addlenmod(form, LUA_FLTFRMLEN);
          nb = sprintf(buff, form, (LUA_FLTFRM_T)luaL_checknumber(L, arg));
          break;
        }
        case 'q': {
          addquoted(L, &b, arg);
          break;
        }
        case 's': {
          size_t l;
          const char *s = luaL_tolstring(L, arg, &l);
          if (!strchr(form, '.') && l >= 100) {
            /* no precision and string is too long to be formatted;
               keep original string */
            luaL_addvalue(&b);
            break;
          }
          else {
            nb = sprintf(buff, form, s);
            lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
            break;
          }
        }
        default: {  /* also treat cases `pnLlh' */
          return luaL_error(L, "invalid option " LUA_QL("%%%c") " to "
                               LUA_QL("format"), *(strfrmt - 1));
        }
      }
      luaL_addsize(&b, nb);
    }
  }
  luaL_pushresult(&b);
  return 1;
}
示例#4
0
bool Eluna::ExecuteCall(int params, int res)
{
    int top = lua_gettop(L);
    int base = top - params;

    // Expected: function, [parameters]
    ASSERT(base > 0);

    // Check function type
    if (!lua_isfunction(L, base))
    {
        ELUNA_LOG_ERROR("[Eluna]: Cannot execute call: registered value is %s, not a function.", luaL_tolstring(L, base, NULL));
        ASSERT(false); // stack probably corrupt
    }

    bool usetrace = eConfigMgr->GetBoolDefault("Eluna.TraceBack", false);
    if (usetrace)
    {
        lua_pushcfunction(L, &StackTrace);
        // Stack: function, [parameters], traceback
        lua_insert(L, base);
        // Stack: traceback, function, [parameters]
    }

    // Objects are invalidated when event_level hits 0
    ++event_level;
    int result = lua_pcall(L, params, res, usetrace ? base : 0);
    --event_level;

    if (usetrace)
    {
        // Stack: traceback, [results or errmsg]
        lua_remove(L, base);
    }
    // Stack: [results or errmsg]

    // lua_pcall returns 0 on success.
    // On error print the error and push nils for expected amount of returned values
    if (result)
    {
        // Stack: errmsg
        Report(L);

        // Force garbage collect
        lua_gc(L, LUA_GCCOLLECT, 0);

        // Push nils for expected amount of results
        for (int i = 0; i < res; ++i)
            lua_pushnil(L);
        // Stack: [nils]
        return false;
    }

    // Stack: [results]
    return true;
}
示例#5
0
文件: luaa.c 项目: baguette/awesome
static const char *
luaA_tolstring(lua_State *L, int idx, size_t *len)
{
    return luaL_tolstring(L, idx, len);
}