X-Git-Url: https://code.kerkeslager.com/?a=blobdiff_plain;f=templates%2Fprogram.c;h=2fea651ecef3f0e3b79b6157536bc122c15a4785;hb=d6b88eb7b1639cef51f95124fcd7ce44e82fadb8;hp=3d1507610b288f2db08d78c79e1a4a5f83925b9f;hpb=4ba4fcfbb2712a22a9f3211182c9ec6cee9dd0f8;p=fur

diff --git a/templates/program.c b/templates/program.c
index 3d15076..2fea651 100644
--- a/templates/program.c
+++ b/templates/program.c
@@ -1,18 +1,321 @@
+#include <assert.h>
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
 {% for standard_library in standard_libraries %}
-#include<{{standard_library}}>
+#include <{{standard_library}}>
+{% endfor %}
+
+struct String;
+typedef struct String String;
+enum Type;
+typedef enum Type Type;
+union Instance;
+typedef union Instance Instance;
+struct Object;
+typedef struct Object Object;
+struct Runtime;
+typedef struct Runtime Runtime;
+
+const char * const SYMBOL_LIST[] = {
+{% for symbol in symbol_list %}
+  "{{ symbol }}",
 {% endfor %}
+};
+
+enum Type
+{
+  BOOLEAN,
+  INTEGER,
+  STRING
+};
+
+union Instance
+{
+  bool boolean;
+  int32_t integer;
+  char* string;
+};
+
+struct Object
+{
+  Type type;
+  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);
+}
+
+Object integerLiteral(int32_t literal)
+{
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = literal;
+  return result;
+}
+
+Object stringLiteral(char* literal)
+{
+  Object result;
+  result.type = STRING;
+  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);
+  assert(right.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = left.instance.integer + right.instance.integer;
+  return result;
+}
+
+Object builtin$subtract(Object left, Object right)
+{
+  assert(left.type == INTEGER);
+  assert(right.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = left.instance.integer - right.instance.integer;
+  return result;
+}
+
+Object builtin$multiply(Object left, Object right)
+{
+  assert(left.type == INTEGER);
+  assert(right.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = left.instance.integer * right.instance.integer;
+  return result;
+}
+
+Object builtin$integerDivide(Object left, Object right)
+{
+  assert(left.type == INTEGER);
+  assert(right.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = left.instance.integer / right.instance.integer;
+  return result;
+}
+
+Object builtin$modularDivide(Object left, Object right)
+{
+  assert(left.type == INTEGER);
+  assert(right.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = left.instance.integer % right.instance.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)
+{
+  assert(base.type == INTEGER);
+  assert(exponent.type == INTEGER);
+
+  Object result;
+  result.type = INTEGER;
+  result.instance.integer = pow(base.instance.integer, exponent.instance.integer);
+  return result;
+}
+{% endif %}
 
 {% if 'print' in builtins %}
-void builtin$print(const char* output)
+void builtin$print(Object output)
 {
-  printf("%s\n", output);
+  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
+      printf("%s", output.instance.string);
+      break;
+
+    default:
+      assert(false);
+  }
 }
 {% endif %}
 
 int main(int argc, char** argv)
 {
+  Environment* environment = Environment_construct();
+
   {% for statement in statements %}
   {{ statement }}
   {% endfor %}
+
+  Environment_destruct(environment);
+
   return 0;
 }