struct Runtime;
typedef struct Runtime Runtime;
-struct String
-{
- size_t length;
- char* characters;
-};
-
-#define MAX_SYMBOL_LENGTH {{ MAX_SYMBOL_LENGTH }}
-struct Symbol;
-typedef struct Symbol Symbol;
-struct Symbol
-{
- size_t length;
- char name[MAX_SYMBOL_LENGTH];
+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
{
- Symbol* key;
+ const char* key;
Object value;
EnvironmentNode* next;
};
EnvironmentNode* next;
for(EnvironmentNode* node = self->root; node != NULL; node = next)
{
- // We don't need to destruct the keys, because those will be destructed at the end when the Runtime is destructed
// We don't need to destruct the permanent strings, because those will be destructed at the end when the Runtime is destructed
- // The above two comments represent all heap-allocated objects currently, so we don't need to destruct Objects (yet)
+ // 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, Symbol* key, Object value)
+void Environment_set(Environment* self, const char* const key, Object value)
{
EnvironmentNode* node = malloc(sizeof(EnvironmentNode));
node->key = key;
self->root = node;
}
-Object Environment_get(Environment* self, Symbol* symbol)
+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 within Runtime->symbols
+ // We can compare pointers because pointers are unique in the SYMBOLS_LIST
if(node->key == symbol)
{
return node->value;
}
-// TODO Allocate all symbols and strings as static constants so we can remove the level of indirection
struct Runtime
{
size_t permanentStringsLength;
size_t permanentStringsAllocated;
- String** permanentStrings;
- size_t symbolsLength;
- size_t symbolsAllocated;
- Symbol** symbols;
+ char** permanentStrings;
};
Runtime* Runtime_construct()
result->permanentStringsLength = 0;
result->permanentStringsAllocated = 0;
result->permanentStrings = NULL;
- result->symbolsLength = 0;
- result->symbolsAllocated =0;
- result->symbols = NULL;
return result;
}
void Runtime_destruct(Runtime* self)
{
- for(size_t i = 0; i < self->permanentStringsLength; i++)
- {
- free(self->permanentStrings[i]);
- }
-
- for(size_t i = 0; i < self->symbolsLength; i++)
- {
- free(self->symbols[i]);
- }
-
free(self->permanentStrings);
- free(self->symbols);
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
self->permanentStringsLength++;
}
-// TODO Optimize this by sorting the symbols
-// TODO Make this function thread safe
-Symbol* Runtime_symbol(Runtime* self, const char* name)
-{
- assert(strlen(name) <= MAX_SYMBOL_LENGTH);
-
- for(size_t i = 0; i < self->symbolsLength; i++)
- {
- if(strcmp(self->symbols[i]->name, name) == 0)
- {
- return self->symbols[i];
- }
- }
-
- if(self->symbolsLength == self->symbolsAllocated)
- {
- if(self->symbolsAllocated == 0)
- {
- self->symbolsAllocated = 8;
- }
- else
- {
- self->symbolsAllocated = self->symbolsAllocated * 2;
- }
-
- self->symbols = realloc(
- self->symbols,
- sizeof(Symbol*) * self->symbolsAllocated
- );
-
- // TODO Handle realloc returning NULL
- }
-
- Symbol* result = malloc(sizeof(Symbol));
- result->length = strlen(name);
- strcpy(result->name, name);
-
- self->symbols[self->symbolsLength] = result;
- self->symbolsLength++;
-
- return result;
-}
-
Object integerLiteral(int32_t literal)
{
Object result;
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;
}
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:
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