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/*
** fallback.c
** TecCGraf - PUC-Rio
*/
char *rcs_fallback="$Id: fallback.c,v 1.2 1994/11/08 19:56:39 roberto Exp roberto $";
#include <stdio.h>
#include <stdlib.h>
#include "fallback.h"
#include "opcode.h"
#include "inout.h"
#include "lua.h"
void luaI_errorFB (void)
{
lua_Object o = lua_getparam(1);
if (lua_isstring(o))
fprintf (stderr, "lua: %s\n", lua_getstring(o));
else
fprintf(stderr, "lua: unknown error\n");
}
void luaI_indexFB (void)
{
lua_pushnil();
}
void luaI_gettableFB (void)
{
lua_reportbug("indexed expression not a table");
}
void luaI_arithFB (void)
{
lua_reportbug("unexpected type at conversion to number");
}
void luaI_concatFB (void)
{
lua_reportbug("unexpected type at conversion to string");
}
void luaI_orderFB (void)
{
lua_reportbug("unexpected type at comparison");
}
/*
** Lock routines
*/
static Object *lockArray = NULL;
static int lockSize = 0;
int lua_lock (lua_Object object)
{
int i;
int oldSize;
if (lua_isnil(object))
return -1;
for (i=0; i<lockSize; i++)
if (tag(&lockArray[i]) == LUA_T_NIL)
{
lockArray[i] = *luaI_Address(object);
return i;
}
/* no more empty spaces */
oldSize = lockSize;
if (lockArray == NULL)
{
lockSize = 10;
lockArray = (Object *)malloc(lockSize);
}
else
{
lockSize = 3*oldSize/2 + 5;
lockArray = (Object *)realloc(lockArray, lockSize);
}
if (lockArray == NULL)
{
lockSize = 0;
lua_error("lock - not enough memory");
}
for (i=oldSize; i<lockSize; i++)
tag(&lockArray[i]) = LUA_T_NIL;
lockArray[oldSize] = *luaI_Address(object);
return oldSize;
}
void lua_unlock (int ref)
{
tag(&lockArray[ref]) = LUA_T_NIL;
}
Object *luaI_getlocked (int ref)
{
return &lockArray[ref];
}
void luaI_travlock (void (*fn)(Object *))
{
int i;
for (i=0; i<lockSize; i++)
fn(&lockArray[i]);
}
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