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ERRORMESSAGE uses auxlib's buffer to build message string

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Roberto Ierusalimschy 2000-09-12 10:48:34 -03:00
parent 4ef14ba280
commit d1c351857d
1 changed files with 15 additions and 18 deletions
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33
liolib.c
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@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 1.78 2000/09/11 17:38:42 roberto Exp roberto $
** $Id: liolib.c,v 1.79 2000/09/11 20:29:27 roberto Exp roberto $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -590,30 +590,27 @@ 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;
lua_settop(L, 1);
luaL_checktype(L, 1, "string");
lua_pushstring(L, "error: ");
lua_insert(L, 1);
lua_pushstring(L, "\nstack traceback:\n");
lua_concat(L, 3);
luaL_Buffer b;
luaL_buffinit(L, &b);
luaL_addstring(&b, "error: ");
luaL_addstring(&b, luaL_check_string(L, 1));
luaL_addstring(&b, "\nstack traceback:\n");
while (lua_getstack(L, level++, &ar)) {
char buff[120]; /* enough to fit following `sprintf's */
int toconcat = 1; /* number of strings in the stack to concat */
if (level > LEVELS1 && firstpart) {
/* no more than `LEVELS2' more levels? */
if (!lua_getstack(L, level+LEVELS2, &ar))
level--; /* keep going */
else {
lua_pushstring(L, " ...\n"); /* too many levels */
lua_concat(L, 2);
luaL_addstring(&b, " ...\n"); /* too many levels */
while (lua_getstack(L, level+LEVELS2, &ar)) /* find last levels */
level++;
level++;
}
firstpart = 0;
continue;
}
sprintf(buff, "%4d: ", level-1);
lua_pushstring(L, buff); toconcat++;
luaL_addstring(&b, buff);
lua_getinfo(L, "Snl", &ar);
switch (*ar.namewhat) {
case 'g': case 'l': /* global, local */
@ -632,21 +629,21 @@ static int errorfb (lua_State *L) {
sprintf(buff, "%.70s", ar.source_id);
else
sprintf(buff, "function <%d:%.70s>", ar.linedefined, ar.source_id);
ar.source = NULL;
ar.source = NULL; /* do not print source again */
}
}
lua_pushstring(L, buff); toconcat++;
luaL_addstring(&b, buff);
if (ar.currentline > 0) {
sprintf(buff, " at line %d", ar.currentline);
lua_pushstring(L, buff); toconcat++;
luaL_addstring(&b, buff);
}
if (ar.source) {
sprintf(buff, " [%.70s]", ar.source_id);
lua_pushstring(L, buff); toconcat++;
luaL_addstring(&b, buff);
}
lua_pushstring(L, "\n"); toconcat++;
lua_concat(L, toconcat);
luaL_addstring(&b, "\n");
}
luaL_pushresult(&b);
lua_getglobals(L);
lua_pushstring(L, LUA_ALERT);
lua_rawget(L, -2);