55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/**************************************************************
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_ __ _ _
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_ __ ___| |_ _ __ ___ / _| ___ _ __| |_| |__
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| '__/ _ \ __| '__/ _ \| |_ / _ \| '__| __| '_ \
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| | | __/ |_| | | (_) | _| (_) | | | |_| | | |
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|_| \___|\__|_| \___/|_| \___/|_| \__|_| |_|
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for nga
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(c) Charles Childers, Luke Parrish, Marc Simpsonn,
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Jay Skeer, Kenneth Keating
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**************************************************************/
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/*
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| 001 | Data Stack Underflow |
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| 002 | Data Stack Overflow |
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| 003 | Address Stack Underflow |
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| 004 | Address Stack Overflow |
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| 005 | Invalid Memory Access |
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| 006 | Division by Zero |
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*/
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#ifdef ENABLE_ERROR
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void execute(NgaState *vm, CELL cell);
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void handle_error(NgaState *vm, CELL error) {
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CELL saved_ip = vm->cpu[vm->active].ip;
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if (vm->ErrorHandlers[error] != 0) {
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printf("\nHandling %lld\n", (long long)error);
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execute(vm, vm->ErrorHandlers[error]);
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}
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vm->cpu[vm->active].ip = saved_ip;
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}
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void register_error_handler(NgaState *vm) {
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CELL ErrorID = stack_pop(vm);
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CELL ErrorHandler = stack_pop(vm);
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vm->ErrorHandlers[ErrorID] = ErrorHandler;
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printf("Assigned %lld to %lld\n", (long long)ErrorID, (long long)ErrorHandler);
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}
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void io_error(NgaState *vm) {
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switch (stack_pop(vm)) {
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case 0: register_error_handler(vm); break;
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default: break;
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}
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}
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void query_error(NgaState *vm) {
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stack_push(vm, 0);
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stack_push(vm, DEVICE_ERROR);
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}
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#endif
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