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`debug.traceback' gets an optional `initial level' parameter

This commit is contained in:
Roberto Ierusalimschy 2005-01-10 15:21:10 -02:00
parent 0480ea0886
commit a27497aa03
1 changed files with 8 additions and 3 deletions
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11
ldblib.c
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@ -1,5 +1,5 @@
/* /*
** $Id: ldblib.c,v 1.89 2004/11/17 12:02:41 roberto Exp roberto $ ** $Id: ldblib.c,v 1.90 2005/01/10 16:30:59 roberto Exp roberto $
** Interface from Lua to its debug API ** Interface from Lua to its debug API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -275,12 +275,17 @@ static int debug (lua_State *L) {
#define LEVELS2 10 /* size of the second part of the stack */ #define LEVELS2 10 /* size of the second part of the stack */
static int errorfb (lua_State *L) { static int errorfb (lua_State *L) {
int level = 0; int level;
int firstpart = 1; /* still before eventual `...' */ int firstpart = 1; /* still before eventual `...' */
int arg; int arg;
lua_State *L1 = getthread(L, &arg); lua_State *L1 = getthread(L, &arg);
lua_Debug ar; lua_Debug ar;
if (L == L1) level++; /* skip level 0 (it's this function) */ if (lua_isnumber(L, arg+2)) {
level = lua_tonumber(L, arg+2);
lua_pop(L, 1);
}
else
level = (L == L1) ? 1 : 0; /* level 0 may be this own function */
if (lua_gettop(L) == arg) if (lua_gettop(L) == arg)
lua_pushliteral(L, ""); lua_pushliteral(L, "");
else if (!lua_isstring(L, arg+1)) return 1; /* message is not a string */ else if (!lua_isstring(L, arg+1)) return 1; /* message is not a string */