Move builtins to a separate file

Probably want to add more builtins in the future, so pulling it out
of `parser.c` seems like the reasonable thing to do

1 files changed, 47 insertions, 0 deletions

diff --git a/src/builtins.c b/src/builtins.c
new file mode 100644
index 0000000..591caeb
--- /dev/null
+++ b/src/builtins.c
@@ -0,0 +1,47 @@
+#include "builtins.h"
+#include "ast.h"
+#include "utils.h"
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+
+
+#define MAX_BUILTINS_COUNT 128
+static Node *all_builtins[MAX_BUILTINS_COUNT];
+static i64 builtins_count = 0;
+
+static void push_builtin(Node *node)
+{
+    assert(builtins_count < MAX_BUILTINS_COUNT);
+    all_builtins[builtins_count++] = node;
+}
+
+void initialize_builtins()
+{
+    Node *node;
+    // FIXME: The `TYPE_ANY` is a hack
+    node = Node_new(AST_BUILTIN);
+    node->func.name = "print";
+    node->func.return_type = type_new(TYPE_INT);
+    node->func.num_args = 1;
+    node->func.args = (Variable *)calloc(sizeof(Variable), 1);
+    node->func.args[0] = (Variable){"val", type_new(TYPE_ANY), 0};
+    push_builtin(node);
+
+    node = Node_new(AST_BUILTIN);
+    node->func.name = "putc";
+    node->func.return_type = type_new(TYPE_INT);
+    node->func.num_args = 1;
+    node->func.args = (Variable *)calloc(sizeof(Variable), 2);
+    node->func.args[0] = (Variable){"arg", type_new(TYPE_INT), 0};
+    push_builtin(node);
+}
+
+Node *find_builtin_function(Token *token)
+{
+    for (i64 i = 0; i < builtins_count; i++) {
+        if (strcmp(all_builtins[i]->func.name, token->value.as_string) == 0)
+            return all_builtins[i];
+    }
+    return NULL;
+}
\ No newline at end of file