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Implemented a union type to make vm_push_* routines uniform

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Function dispatch
This commit is contained in:
Aryadev Chavali
2023-10-15 04:36:47 +01:00
parent 49a85a20d8
commit d52d7ad413
1 changed files with 11 additions and 5 deletions
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16
src/main.c
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@@ -35,20 +35,26 @@ typedef struct
} stack; } stack;
} vm_t; } vm_t;
void vm_push_byte(vm_t *vm, byte b) typedef union
{
byte as_byte;
word as_word;
} data_t;
void vm_push_byte(vm_t *vm, data_t b)
{ {
if (vm->stack.pointer >= VM_STACK_MAX) if (vm->stack.pointer >= VM_STACK_MAX)
return; return;
vm->stack.data[vm->stack.pointer++] = b; vm->stack.data[vm->stack.pointer++] = b.as_byte;
} }
void vm_push_word(vm_t *vm, word w) void vm_push_word(vm_t *vm, data_t w)
{ {
// NOTE: Relies on sizeof measuring in bytes // NOTE: Relies on sizeof measuring in bytes
if (vm->stack.pointer + sizeof(w) >= VM_STACK_MAX) if (vm->stack.pointer + sizeof(w) >= VM_STACK_MAX)
return; return;
memcpy(vm->stack.data + vm->stack.pointer, &w, sizeof(w)); memcpy(vm->stack.data + vm->stack.pointer, &w.as_word, sizeof(w.as_word));
vm->stack.pointer += sizeof(w); vm->stack.pointer += sizeof(w.as_word);
} }
int main(void) int main(void)