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add memory.[get|set]register; since I don't know about NES specification much, there are only a, x, y, and pc at present.

This commit is contained in:
gocha 2009-10-11 08:50:09 +00:00
parent 3ab41b359c
commit 3cabff32c6
1 changed files with 98 additions and 0 deletions
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98
src/lua-engine.cpp
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@ -33,6 +33,8 @@ extern "C"
#include "movie.h"
#include "driver.h"
#include "cheat.h"
#include "x6502.h"
#include "x6502abbrev.h"
#include "utils/xstring.h"
#include "utils/memory.h"
#include "fceulua.h"
@ -430,6 +432,100 @@ static int memory_readbyterange(lua_State *L) {
return 1;
}
struct registerPointerMap
{
const char* registerName;
unsigned int* pointer;
int dataSize;
};
#define RPM_ENTRY(name,var) {name, (unsigned int*)&var, sizeof(var)},
registerPointerMap regPointerMap [] = {
RPM_ENTRY("a", _A)
RPM_ENTRY("x", _X)
RPM_ENTRY("y", _Y)
RPM_ENTRY("pc", _PC)
{}
};
struct cpuToRegisterMap
{
const char* cpuName;
registerPointerMap* rpmap;
}
cpuToRegisterMaps [] =
{
{"", regPointerMap},
};
//DEFINE_LUA_FUNCTION(memory_getregister, "cpu_dot_registername_string")
static int memory_getregister(lua_State *L)
{
const char* qualifiedRegisterName = luaL_checkstring(L,1);
lua_settop(L,0);
for(int cpu = 0; cpu < sizeof(cpuToRegisterMaps)/sizeof(*cpuToRegisterMaps); cpu++)
{
cpuToRegisterMap ctrm = cpuToRegisterMaps[cpu];
int cpuNameLen = strlen(ctrm.cpuName);
if(!strnicmp(qualifiedRegisterName, ctrm.cpuName, cpuNameLen))
{
qualifiedRegisterName += cpuNameLen;
for(int reg = 0; ctrm.rpmap[reg].dataSize; reg++)
{
registerPointerMap rpm = ctrm.rpmap[reg];
if(!stricmp(qualifiedRegisterName, rpm.registerName))
{
switch(rpm.dataSize)
{ default:
case 1: lua_pushinteger(L, *(unsigned char*)rpm.pointer); break;
case 2: lua_pushinteger(L, *(unsigned short*)rpm.pointer); break;
case 4: lua_pushinteger(L, *(unsigned long*)rpm.pointer); break;
}
return 1;
}
}
lua_pushnil(L);
return 1;
}
}
lua_pushnil(L);
return 1;
}
//DEFINE_LUA_FUNCTION(memory_setregister, "cpu_dot_registername_string,value")
static int memory_setregister(lua_State *L)
{
const char* qualifiedRegisterName = luaL_checkstring(L,1);
unsigned long value = (unsigned long)(luaL_checkinteger(L,2));
lua_settop(L,0);
for(int cpu = 0; cpu < sizeof(cpuToRegisterMaps)/sizeof(*cpuToRegisterMaps); cpu++)
{
cpuToRegisterMap ctrm = cpuToRegisterMaps[cpu];
int cpuNameLen = strlen(ctrm.cpuName);
if(!strnicmp(qualifiedRegisterName, ctrm.cpuName, cpuNameLen))
{
qualifiedRegisterName += cpuNameLen;
for(int reg = 0; ctrm.rpmap[reg].dataSize; reg++)
{
registerPointerMap rpm = ctrm.rpmap[reg];
if(!stricmp(qualifiedRegisterName, rpm.registerName))
{
switch(rpm.dataSize)
{ default:
case 1: *(unsigned char*)rpm.pointer = (unsigned char)(value & 0xFF); break;
case 2: *(unsigned short*)rpm.pointer = (unsigned short)(value & 0xFFFF); break;
case 4: *(unsigned long*)rpm.pointer = value; break;
}
return 0;
}
}
return 0;
}
}
return 0;
}
void HandleCallbackError(lua_State* L)
{
@ -2383,6 +2479,8 @@ static const struct luaL_reg memorylib [] = {
{"readbyterange", memory_readbyterange},
{"readbytesigned", memory_readbytesigned},
{"writebyte", memory_writebyte},
{"getregister", memory_getregister},
{"setregister", memory_setregister},
// alternate naming scheme for unsigned
{"readbyteunsigned", memory_readbyte},