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#include "nitro.h"
#include "script.h"
void InitScriptContext(struct ScriptContext *ctx, void *cmdTable, void *cmdTableEnd)
{
u32 i;
ctx->mode = 0;
ctx->scriptPtr = 0;
ctx->stackDepth = 0;
ctx->nativePtr = 0;
ctx->cmdTable = cmdTable;
ctx->cmdTableEnd = cmdTableEnd;
for (i = 0; i < 4; i++)
ctx->data[i] = 0;
for (i = 0; i < 20; i++)
ctx->stack[i] = 0;
ctx->unk74 = 0;
}
u8 SetupBytecodeScript(struct ScriptContext *ctx, const u8 *ptr)
{
ctx->scriptPtr = ptr;
ctx->mode = 1;
return 1;
}
void SetupNativeScript(struct ScriptContext *ctx, u8 (*ptr)(void))
{
ctx->mode = 2;
ctx->nativePtr = ptr;
}
void StopScript(struct ScriptContext *ctx)
{
ctx->mode = 0;
ctx->scriptPtr = 0;
}
void FUN_02038B6C(struct ScriptContext *ctx, int r1)
{
ctx->unk74 = r1;
}
extern void ErrorHandling(void);
#ifdef NONMATCHING
u8 RunScriptCommand(struct ScriptContext *ctx)
{
struct ScriptContext *localCtx = ctx;
if (localCtx->mode == 0)
return FALSE;
switch (localCtx->mode)
{
case 0:
return FALSE;
case 2:
if (localCtx->nativePtr)
{
if (localCtx->nativePtr() == TRUE)
localCtx->mode = 1;
return TRUE;
}
localCtx->mode = 1;
case 1:
while (1)
{
u16 cmdCode;
ScrCmdFunc *func;
if (!localCtx->scriptPtr)
{
localCtx->mode = 0;
return FALSE;
}
cmdCode = ScriptReadHalfword(localCtx);
if ((u32)localCtx->cmdTableEnd >= cmdCode)
{
ErrorHandling();
localCtx->mode = 0;
return FALSE;
}
func = &localCtx->cmdTable[cmdCode];
if ((*func)(localCtx) == 1)
break;
}
}
return TRUE;
}
#else
u8 RunScriptCommand(struct ScriptContext *ctx)
{
__asm {
add r4, r0, #0x0
ldrb r1, [r4, #0x1]
cmp r1, #0x0
bne _02038B7E
mov r0, #0x0
pop {r4, pc}
_02038B7E:
beq _02038B8A
cmp r1, #0x1
beq _02038BA6
cmp r1, #0x2
beq _02038B8E
b _02038BD8
_02038B8A:
mov r0, #0x0
pop {r4, pc}
_02038B8E:
ldr r1, [r4, #0x4]
cmp r1, #0x0
beq _02038BA2
blx r1
cmp r0, #0x1
bne _02038B9E
mov r0, #0x1
strb r0, [r4, #0x1]
_02038B9E:
mov r0, #0x1
pop {r4, pc}
_02038BA2:
mov r0, #0x1
strb r0, [r4, #0x1]
// for some reason it adds a b _02038BA6 here
_02038BA6:
ldr r0, [r4, #0x8]
cmp r0, #0x0
bne _02038BB2
mov r0, #0x0
strb r0, [r4, #0x1]
pop {r4, pc}
_02038BB2:
add r0, r4, #0x0
bl ScriptReadHalfword
add r1, r0, #0x0
ldr r0, [r4, #0x60]
cmp r1, r0
blo _02038BCA
bl ErrorHandling
mov r0, #0x0
strb r0, [r4, #0x1]
pop {r4, pc}
_02038BCA:
ldr r2, [r4, #0x5c]
lsl r1, r1, #0x2
ldr r1, [r2, r1]
add r0, r4, #0x0
blx r1
cmp r0, #0x1
bne _02038BA6
_02038BD8:
mov r0, #0x1
}
}
#endif
u8 ScriptPush(struct ScriptContext *ctx, const u8 *ptr)
{
if (ctx->stackDepth + 1 >= 20)
{
return 1;
}
else
{
ctx->stack[ctx->stackDepth] = ptr;
ctx->stackDepth++;
return 0;
}
}
const u8 *ScriptPop(struct ScriptContext *ctx)
{
if (ctx->stackDepth == 0)
return NULL;
ctx->stackDepth--;
return ctx->stack[ctx->stackDepth];
}
void ScriptJump(struct ScriptContext *ctx, const u8 *ptr)
{
ctx->scriptPtr = ptr;
}
void ScriptCall(struct ScriptContext *ctx, const u8 *ptr)
{
ScriptPush(ctx, ctx->scriptPtr);
ctx->scriptPtr = ptr;
}
void ScriptReturn(struct ScriptContext *ctx)
{
ctx->scriptPtr = ScriptPop(ctx);
}
u16 ScriptReadHalfword(struct ScriptContext *ctx)
{
u16 value = *(ctx->scriptPtr++);
value += *(ctx->scriptPtr++) << 8;
return value;
}
u32 ScriptReadWord(struct ScriptContext *ctx)
{
u32 value0 = *(ctx->scriptPtr++);
u32 value1 = *(ctx->scriptPtr++);
u32 value2 = *(ctx->scriptPtr++);
u32 value3 = *(ctx->scriptPtr++);
u32 retVal = 0;
retVal += value3;
retVal <<= 8;
retVal += value2;
retVal <<= 8;
retVal += value1;
retVal <<= 8;
retVal += value0;
return retVal;
}
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