struct Runtime;
typedef struct Runtime Runtime;
-struct String
-{
- size_t length;
- char* characters;
+const char * const SYMBOL_LIST[] = {
+{% for symbol in symbol_list %}
+ "{{ symbol }}",
+{% endfor %}
};
enum Type
{
+ BOOLEAN,
INTEGER,
STRING
};
union Instance
{
+ bool boolean;
int32_t integer;
- String* string;
+ char* string;
};
struct Object
Instance instance;
};
+const Object TRUE = {
+ BOOLEAN,
+ true
+};
+
+const Object FALSE = {
+ BOOLEAN,
+ false
+};
+
+struct EnvironmentNode;
+typedef struct EnvironmentNode EnvironmentNode;
+struct EnvironmentNode
+{
+ const char* key;
+ Object value;
+ EnvironmentNode* next;
+};
+
+struct Environment;
+typedef struct Environment Environment;
+struct Environment
+{
+ EnvironmentNode* root;
+};
+
+Environment* Environment_construct()
+{
+ // TODO Handle malloc returning NULL
+ Environment* result = malloc(sizeof(Environment));
+ result->root = NULL;
+ return result;
+}
+
+void Environment_destruct(Environment* self)
+{
+ EnvironmentNode* next;
+ for(EnvironmentNode* node = self->root; node != NULL; node = next)
+ {
+ // We don't need to destruct the permanent strings, because those will be destructed at the end when the Runtime is destructed
+ // The above comment represents all heap-allocated objects currently, so we don't need to destruct Objects (yet)
+ next = node->next;
+ free(node);
+ }
+}
+
+// This need not be thread safe because environments exist on one thread only
+void Environment_set(Environment* self, const char* const key, Object value)
+{
+ EnvironmentNode* node = malloc(sizeof(EnvironmentNode));
+ node->key = key;
+ node->value = value;
+ node->next = self->root;
+ self->root = node;
+}
+
+Object Environment_get(Environment* self, const char* const symbol)
+{
+ for(EnvironmentNode* node = self->root; node != NULL; node = node->next)
+ {
+ // We can compare pointers because pointers are unique in the SYMBOLS_LIST
+ if(node->key == symbol)
+ {
+ return node->value;
+ }
+ }
+
+ // TODO Handle symbol errors
+ assert(false);
+}
+
+
struct Runtime
{
size_t permanentStringsLength;
size_t permanentStringsAllocated;
- String** permanentStrings;
+ char** permanentStrings;
};
Runtime* Runtime_construct()
free(self);
}
-void Runtime_addPermanentString(Runtime* self, String* string)
+void Runtime_addPermanentString(Runtime* self, char* const string)
{
// TODO Make this function thread-safe
if(self->permanentStringsLength == self->permanentStringsAllocated)
self->permanentStrings = realloc(
self->permanentStrings,
- sizeof(String*) * self->permanentStringsAllocated
+ sizeof(char* const) * self->permanentStringsAllocated
);
// TODO Handle realloc returning NULL
return result;
}
-Object stringLiteral(Runtime* runtime, const char* literal)
+Object stringLiteral(Runtime* runtime, char* literal)
{
- String* resultString = malloc(sizeof(String));
- resultString->length = strlen(literal);
- resultString->characters = malloc(resultString->length);
- memcpy(resultString->characters, literal, resultString->length);
- Runtime_addPermanentString(runtime, resultString);
+ Runtime_addPermanentString(runtime, literal);
Object result;
result.type = STRING;
- result.instance.string = resultString;
+ result.instance.string = literal;
return result;
}
// TODO Make this conditionally added
+Object builtin$negate(Object input)
+{
+ assert(input.type == INTEGER);
+
+ Object result;
+ result.type = INTEGER;
+ result.instance.integer = -input.instance.integer;
+ return result;
+}
+
Object builtin$add(Object left, Object right)
{
assert(left.type == INTEGER);
return result;
}
+Object builtin$equals(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer == right.instance.integer };
+ return result;
+}
+
+Object builtin$notEquals(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer != right.instance.integer };
+ return result;
+}
+
+Object builtin$greaterThan(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer > right.instance.integer };
+ return result;
+}
+
+Object builtin$lessThan(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer < right.instance.integer };
+ return result;
+}
+
+Object builtin$greaterThanOrEqual(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer >= right.instance.integer };
+ return result;
+}
+
+Object builtin$lessThanOrEqual(Object left, Object right)
+{
+ assert(left.type == INTEGER);
+ assert(right.type == INTEGER);
+
+ Object result = { BOOLEAN, left.instance.integer <= right.instance.integer };
+ return result;
+}
+
+Object builtin$and(Object left, Object right)
+{
+ assert(left.type == BOOLEAN);
+ assert(right.type == BOOLEAN);
+
+ Object result = { BOOLEAN, left.instance.boolean && right.instance.boolean };
+ return result;
+}
+
+Object builtin$or(Object left, Object right)
+{
+ assert(left.type == BOOLEAN);
+ assert(right.type == BOOLEAN);
+
+ Object result = { BOOLEAN, left.instance.boolean || right.instance.boolean };
+ return result;
+}
+
{% if 'pow' in builtins %}
Object builtin$pow(Object base, Object exponent)
{
{
switch(output.type)
{
+ case BOOLEAN:
+ fputs(output.instance.boolean ? "true" : "false", stdout);
+ break;
+
case INTEGER:
printf("%" PRId32, output.instance.integer);
break;
case STRING:
// Using fwrite instead of printf to handle size_t length
- fwrite(output.instance.string->characters, 1, output.instance.string->length, stdout);
+ printf("%s", output.instance.string);
break;
default:
int main(int argc, char** argv)
{
Runtime* runtime = Runtime_construct();
+ Environment* environment = Environment_construct();
{% for statement in statements %}
{{ statement }}
{% endfor %}
+ Environment_destruct(environment);
Runtime_destruct(runtime);
return 0;
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