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:(scenarios run)
:(scenario copy_literal)
recipe main [
1:integer <- copy 23:literal
]
+run: instruction 0
+run: ingredient 0 is 23
+mem: storing in location 1
:(scenario copy)
recipe main [
1:integer <- copy 23:literal
2:integer <- copy 1:integer
]
+run: instruction 1
+run: ingredient 0 is 1
+mem: location 1 is 23
+mem: storing in location 2
:(code)
void run(string form) {
run(add_recipe(form));
}
void run(recipe_number r) {
vector<instruction>& instructions(Recipe[r].steps);
for (size_t pc = 0; pc < instructions.size(); ++pc) {
trace("run") << "instruction " << pc;
switch (instructions[pc].operation) {
// Primitive Recipe Implementations.
case COPY: {
trace("run") << "ingredient 0 is " << instructions[pc].ingredients[0].name;
vector<int> data = read_memory(instructions[pc].ingredients[0]);
write_memory(instructions[pc].products[0], data);
break;
}
// End Primitive Recipe Implementations.
default:
raise << "undefined operation " << instructions[pc].operation;
}
}
}
vector<int> read_memory(reagent x) {
//? cout << "read_memory: " << x.to_string() << '\n'; //? 1
vector<int> result;
if (x.types[0] == 0) { // literal
result.push_back(to_int(x.name));
return result;
}
int base = to_int(x.name);
for (size_t offset = 0; offset < Type[x.types[0]].size; ++offset) {
int val = Memory[base+offset];
trace("mem") << "location " << base+offset << " is " << val;
result.push_back(val);
}
return result;
}
void write_memory(reagent x, vector<int> data) {
int base = to_int(x.name);
size_t size = size_of(x.types[0]);
if (size != data.size()) raise << "size mismatch in storing to " << x.to_string();
for (size_t offset = 0; offset < size; ++offset) {
trace("mem") << "storing in location " << base+offset;
Memory[base+offset] = data[offset];
}
}
:(code)
int to_int(string n) {
char* end = NULL;
int result = strtol(n.c_str(), &end, /*any base*/0);
assert(*end == '\0');
return result;
}
int size_of(type_number x) {
type_info t = Type[x];
if (!t.is_record && !t.is_array) return t.size;
return t.size; // TODO
}
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