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Implemented and tested variable declaration

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Assignment, etc. is still to come, as are types.
This commit is contained in:
Kayne Ruse
2024-10-13 15:02:42 +11:00
parent 1ad6bdff70
commit 80734563b9
18 changed files with 498 additions and 99 deletions
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47
source/toy_vm.c
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@@ -110,6 +110,30 @@ static void processRead(Toy_VM* vm) {
fix_alignment(vm);
}
static void processDeclare(Toy_VM* vm) {
Toy_ValueType type = READ_BYTE(vm); //variable type
unsigned int len = READ_BYTE(vm); //name length
fix_alignment(vm); //one spare byte
//grab the jump
unsigned int jump = *(unsigned int*)(vm->routine + vm->jumpsAddr + READ_INT(vm));
//grab the data
char* cstring = (char*)(vm->routine + vm->dataAddr + jump);
//build the name string
Toy_String* name = Toy_createNameStringLength(&vm->stringBucket, cstring, len, type);
//get the value
Toy_Value value = Toy_popStack(&vm->stack);
//declare it
Toy_declareScope(vm->scope, name, value);
//cleanup
Toy_freeString(name);
}
static void processArithmetic(Toy_VM* vm, Toy_OpcodeType opcode) {
Toy_Value right = Toy_popStack(&vm->stack);
Toy_Value left = Toy_popStack(&vm->stack);
@@ -330,6 +354,10 @@ static void process(Toy_VM* vm) {
processRead(vm);
break;
case TOY_OPCODE_DECLARE:
processDeclare(vm);
break;
//arithmetic instructions
case TOY_OPCODE_ADD:
case TOY_OPCODE_SUBTRACT:
@@ -371,9 +399,11 @@ static void process(Toy_VM* vm) {
break;
//not yet implemented
case TOY_OPCODE_DECLARE:
case TOY_OPCODE_ASSIGN:
case TOY_OPCODE_ACCESS:
fprintf(stderr, TOY_CC_ERROR "ERROR: Incomplete opcode %d found, exiting\n" TOY_CC_RESET, opcode);
exit(-1);
case TOY_OPCODE_PASS:
case TOY_OPCODE_ERROR:
case TOY_OPCODE_EOF:
@@ -389,9 +419,10 @@ static void process(Toy_VM* vm) {
//exposed functions
void Toy_initVM(Toy_VM* vm) {
//clear the stack, scope and memory
vm->stack = NULL;
//TODO: clear the scope
vm->stringBucket = NULL;
vm->scopeBucket = NULL;
vm->stack = NULL;
vm->scope = NULL;
Toy_resetVM(vm);
}
@@ -453,9 +484,10 @@ void Toy_bindVMToRoutine(Toy_VM* vm, unsigned char* routine) {
}
//allocate the stack, scope, and memory
vm->stack = Toy_allocateStack();
//TODO: scope
vm->stringBucket = Toy_allocateBucket(TOY_BUCKET_IDEAL);
vm->scopeBucket = Toy_allocateBucket(TOY_BUCKET_SMALL);
vm->stack = Toy_allocateStack();
vm->scope = Toy_pushScope(&vm->scopeBucket, NULL);
}
void Toy_runVM(Toy_VM* vm) {
@@ -471,8 +503,9 @@ void Toy_runVM(Toy_VM* vm) {
void Toy_freeVM(Toy_VM* vm) {
//clear the stack, scope and memory
Toy_freeStack(vm->stack);
//TODO: clear the scope
Toy_popScope(vm->scope);
Toy_freeBucket(&vm->stringBucket);
Toy_freeBucket(&vm->scopeBucket);
//free the bytecode
free(vm->bc);
@@ -499,5 +532,5 @@ void Toy_resetVM(Toy_VM* vm) {
vm->routineCounter = 0;
//NOTE: stack, scope and memory are not altered by reset
//NOTE: stack, scope and memory are not altered during resets
}