/*
** Basic implementation of _ERRORMESSAGE.
** The library `liolib' redefines _ERRORMESSAGE for better error information.
*/
static int luaB__ERRORMESSAGE (lua_State *L)
{
luaL_checktype(L, 1, LUA_TSTRING);
lua_getglobal(L, LUA_ALERT);
if (lua_isfunction(L, -1)) /* avoid error loop if _ALERT is not defined */
{
lua_Debug ar;
lua_pushstring(L, "error: ");
lua_pushvalue(L, 1);
if (lua_getstack(L, 1, &ar))
{
lua_getinfo(L, "Sl", &ar);
if (ar.source && ar.currentline > 0)
{
char buff[100];
sprintf(buff, "\n <%.70s: line %d>", ar.short_src, ar.currentline);
lua_pushstring(L, buff);
lua_concat(L, 2);
}
}
lua_pushstring(L, "\n");
lua_concat(L, 3);
lua_rawcall(L, 1, 0);
}
return 0;
}
static void add_s (lua_State *L, luaL_Buffer *b, struct Capture *cap) {
if (lua_isstring(L, 3)) {
const char *news = lua_tostring(L, 3);
size_t l = lua_strlen(L, 3);
size_t i;
for (i=0; i<l; i++) {
if (news[i] != ESC)
luaL_putchar(b, news[i]);
else {
i++; /* skip ESC */
if (!isdigit((unsigned char)news[i]))
luaL_putchar(b, news[i]);
else {
int level = check_capture(L, news[i], cap);
luaL_addlstring(b, cap->capture[level].init, cap->capture[level].len);
}
}
}
}
else { /* is a function */
int n;
lua_pushvalue(L, 3);
n = push_captures(L, cap);
lua_rawcall(L, n, 1);
if (lua_isstring(L, -1))
luaL_addvalue(b); /* add return to accumulated result */
else
lua_pop(L, 1); /* function result is not a string: pop it */
}
}
/*
** call corresponding function inserting `globals' as first argument
*/
static int deprecated_func (lua_State *L) {
lua_insert(L, 1); /* upvalue is the function to be called */
lua_getglobals(L);
lua_insert(L, 2); /* table of globals is 1o argument */
lua_rawcall(L, lua_gettop(L)-1, LUA_MULTRET);
return lua_gettop(L); /* return all results */
}
static void hookf (lua_State *L, void *key) {
lua_getregistry(L);
lua_pushuserdata(L, key);
lua_gettable(L, -2);
if (lua_isfunction(L, -1)) {
lua_pushvalue(L, 1);
lua_rawcall(L, 1, 0);
}
else
lua_pop(L, 1); /* pop result from gettable */
lua_pop(L, 1); /* pop table */
}
static int xsort_comp (lua_State *L, int a, int b) {
int res;
lua_pushvalue(L, 2);
lua_pushvalue(L, a-1); /* -1 to compensate function */
lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */
lua_pushvalue(L, 3);
lua_rawcall(L, 3, 1);
res = lua_tonumber(L, -1);
lua_pop(L, 1);
return res;
}
static int sort_comp (lua_State *L, int a, int b) {
/* WARNING: the caller (auxsort) must ensure stack space */
if (!lua_isnil(L, 2)) { /* function? */
int res;
lua_pushvalue(L, 2);
lua_pushvalue(L, a-1); /* -1 to compensate function */
lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */
lua_rawcall(L, 2, 1);
res = !lua_isnil(L, -1);
lua_pop(L, 1);
return res;
}
else /* a < b? */
return lua_lessthan(L, a, b);
}
static int luaB_foreach (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checktype(L, 2, LUA_TFUNCTION);
lua_pushnil(L); /* first index */
for (;;) {
if (lua_next(L, 1) == 0)
return 0;
lua_pushvalue(L, 2); /* function */
lua_pushvalue(L, -3); /* key */
lua_pushvalue(L, -3); /* value */
lua_rawcall(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 2); /* remove value and result */
}
}
static int luaB_foreachi (lua_State *L) {
int n, i;
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checktype(L, 2, LUA_TFUNCTION);
n = lua_getn(L, 1);
for (i=1; i<=n; i++) {
lua_pushvalue(L, 2); /* function */
lua_pushnumber(L, i); /* 1st argument */
lua_rawgeti(L, 1, i); /* 2nd argument */
lua_rawcall(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 1); /* remove nil result */
}
return 0;
}
/*
** If your system does not support `stdout', you can just remove this function.
** If you need, you can define your own `print' function, following this
** model but changing `fputs' to put the strings at a proper place
** (a console window or a log file, for instance).
*/
static int luaB_print (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int i;
lua_getglobal(L, "tostring");
for (i=1; i<=n; i++) {
const char *s;
lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */
lua_rawcall(L, 1, 1);
s = lua_tostring(L, -1); /* get result */
if (s == NULL)
lua_error(L, "`tostring' must return a string to `print'");
if (i>1) fputs("\t", stdout);
fputs(s, stdout);
lua_pop(L, 1); /* pop result */
}
fputs("\n", stdout);
return 0;
}
int CLuaConsoleDlg::lua_Print(lua_State *L)
{
// Snatched this from the Lua source code,
// replacing writes to stdout with my custom
// output to the LuaConsole's edit box
int n = lua_gettop(L); // number of arguments
int i;
lua_getglobal(L, "tostring");
for (i=1; i<=n; i++) {
CString s;
lua_pushvalue(L, -1); // function to be called
lua_pushvalue(L, i); // value to print
lua_rawcall(L, 1, 1);
s = lua_tostring(L, -1); // get result
if (i>1) pThis->ToOutput("\t");
else pThis->ToOutput("--> ");
pThis->ToOutput(s);
lua_pop(L, 1); // pop result
}
pThis->ToOutput("\r\n");
return 0;
}
static int errorfb (lua_State *L) {
int level = 1; /* skip level 0 (it's this function) */
int firstpart = 1; /* still before eventual `...' */
lua_Debug ar;
luaL_Buffer b;
luaL_buffinit(L, &b);
luaL_addstring(&b, "error: ");
luaL_addstring(&b, luaL_check_string(L, 1));
luaL_addstring(&b, "\n");
while (lua_getstack(L, level++, &ar)) {
char buff[120]; /* enough to fit following `sprintf's */
if (level == 2)
luaL_addstring(&b, "stack traceback:\n");
else if (level > LEVELS1 && firstpart) {
/* no more than `LEVELS2' more levels? */
if (!lua_getstack(L, level+LEVELS2, &ar))
level--; /* keep going */
else {
luaL_addstring(&b, " ...\n"); /* too many levels */
while (lua_getstack(L, level+LEVELS2, &ar)) /* find last levels */
level++;
}
firstpart = 0;
continue;
}
sprintf(buff, "%4d: ", level-1);
luaL_addstring(&b, buff);
lua_getinfo(L, "Snl", &ar);
switch (*ar.namewhat) {
case 'g': case 'l': /* global, local */
sprintf(buff, "function `%.50s'", ar.name);
break;
case 'f': /* field */
sprintf(buff, "method `%.50s'", ar.name);
break;
case 't': /* tag method */
sprintf(buff, "`%.50s' tag method", ar.name);
break;
default: {
if (*ar.what == 'm') /* main? */
sprintf(buff, "main of %.70s", ar.short_src);
else if (*ar.what == 'C') /* C function? */
sprintf(buff, "%.70s", ar.short_src);
else
sprintf(buff, "function <%d:%.70s>", ar.linedefined, ar.short_src);
ar.source = NULL; /* do not print source again */
}
}
luaL_addstring(&b, buff);
if (ar.currentline > 0) {
sprintf(buff, " at line %d", ar.currentline);
luaL_addstring(&b, buff);
}
if (ar.source) {
sprintf(buff, " [%.70s]", ar.short_src);
luaL_addstring(&b, buff);
}
luaL_addstring(&b, "\n");
}
luaL_pushresult(&b);
lua_getglobal(L, LUA_ALERT);
if (lua_isfunction(L, -1)) { /* avoid loop if _ALERT is not defined */
lua_pushvalue(L, -2); /* error message */
lua_rawcall(L, 1, 0);
}
return 0;
}
