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#include "script-squirrel.h"
#include <cstring>
/*
* printfunc - Print function for Squirrel
*/
void printfunc(HSQUIRRELVM v, const SQChar *s, ...)
{
va_list arglist;
va_start(arglist, s);
vprintf(s, arglist);
va_end(arglist);
}
/*
* functionCall - Call function with arguments
* fn - name of function
* args - string with argument types.
* 's' = String
* 'i' = Integer
* 'f' = Float
*/
bool functionCall(HSQUIRRELVM v, const char *fn, const char *args, ...)
{
int argCount = 0;
va_list arglist;
va_start(arglist, args);
int top = sq_gettop(v); //save stack
sq_pushroottable(v); //pushes global table
sq_pushstring(v, _SC(fn), -1);
if (SQ_SUCCEEDED(sq_get(v, -2)))
{
sq_pushroottable(v); //push 'this'
if (args != NULL)
{
for (int i = 0; i < strlen(args); i++)
{
switch (args[i])
{
case 'S':
case 's':
//string
argCount++;
sq_pushstring(v, va_arg(arglist, char*), -1);
break;
case 'I':
case 'i':
//integer
argCount++;
sq_pushinteger(v, va_arg(arglist, int));
break;
case 'F':
case 'f':
//float
argCount++;
sq_pushfloat(v, va_arg(arglist, float));
break;
}
}
}
sq_call(v, argCount + 1, 0);
} else
return false;
sq_settop(v, top);
va_end(arglist);
return true;
}
/*
* functionRegister
* Registers a function in Squirrel VM
*/
void functionRegister(HSQUIRRELVM v, SQFUNCTION f, const char *name)
{
sq_pushroottable(v);
sq_pushstring(v, name, -1);
sq_newclosure(v, f, 0);
sq_createslot(v, -3);
sq_pop(v, 1);
}
/*
* Test function called from Squirrel (modified form Squirrel docs)
* Prints the type of all arguments.
*/
int testFunc(HSQUIRRELVM v)
{
int nargs = sq_gettop(v);
for (int n = 1; n <= nargs; n++) {
printf("arg: %d is ", n);
switch (sq_gettype(v, n))
{
case OT_NULL:
printf("null");
break;
case OT_INTEGER:
printf("integer");
break;
case OT_FLOAT:
printf("float");
break;
case OT_STRING:
printf("string");
break;
case OT_TABLE:
printf("table");
break;
case OT_ARRAY:
printf("array");
break;
case OT_USERDATA:
printf("userdata");
break;
case OT_CLOSURE:
printf("closure");
break;
case OT_NATIVECLOSURE:
printf("nativeclosure");
break;
case OT_GENERATOR:
printf("generator");
break;
case OT_USERPOINTER:
printf("userpointer");
break;
default:
printf("unknown");
}
}
printf("\n");
sq_pushinteger(v, nargs);
return 1;
}
/*
* Another test function
*/
int worldTime(HSQUIRRELVM v)
{
sq_pushinteger(v, 10);
return 1;
}
/******/
ScriptSquirrel::ScriptSquirrel(const std::string &file) :
Script(file)
{
vm = sq_open(1024); //1024 byte stack
sqstd_seterrorhandlers(vm);
sq_setprintfunc(vm, printfunc);
sq_pushroottable(vm);
if (!SQ_SUCCEEDED(sqstd_dofile(vm, _SC(scriptName.c_str()), 0, 1))) {
std::cerr << "Error: ScriptSquirrel: could not execute " <<
scriptName << std::endl;
} else {
functionRegister(vm, testFunc, "printargs");
functionRegister(vm, worldTime, "worldtime");
functionCall(vm, "", NULL);
functionCall(vm, "init", NULL);
}
}
ScriptSquirrel::~ScriptSquirrel()
{
functionCall(vm, "destroy", NULL);
sq_pop(vm, 1);
sq_close(vm);
}
void ScriptSquirrel::update()
{
functionCall(vm, "update", NULL);
}
bool ScriptSquirrel::execute(const std::string &functionName)
{
return functionCall(vm, functionName.c_str(), NULL);
}
void ScriptSquirrel::message(char *msg)
{
functionCall(vm, "message", "s", msg);
}
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