From a36ae22d522e0bb416015f2cec4aa32caf807eb1 Mon Sep 17 00:00:00 2001
From: Jacob Signorovitch <jacob.signorovitch@gmail.com>
Date: Sat, 23 Nov 2024 09:30:35 -0500
Subject: [PATCH] Added exec, grammar files.

---
 src/exec.c         | 31 +++++++++++++++++++++++++++++++
 src/grammar.y      |  8 +++++---
 src/include/exec.h | 10 ++++++++++
 src/main.c         |  4 +++-
 4 files changed, 49 insertions(+), 4 deletions(-)
 create mode 100644 src/exec.c
 create mode 100644 src/include/exec.h

diff --git a/src/exec.c b/src/exec.c
new file mode 100644
index 0000000..1d1d21f
--- /dev/null
+++ b/src/exec.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "include/ast.h"
+#include "include/exec.h"
+#include "include/util.h"
+
+void exec(AST* ast) {
+    log_dbg("Started execution.");
+    switch (ast->type) {
+    case AST_TYPE_CALL: exec_call(ast); break;
+    default:            printf("what\n");
+    }
+}
+
+void exec_call(AST* ast) {
+    log_dbg("Started call execution.");
+    ASTTypeCall* calldata = (ASTTypeCall*)ast->data;
+    if (!strcmp(calldata->to, "+") && calldata->argc == 2) {
+
+        exec_return(1);
+        /*
+        ASTTypeNum* n1 = (ASTTypeNum*)calldata->argv[0]->data;
+        ASTTypeNum* n2 = (ASTTypeNum*)calldata->argv[1]->data;
+
+        exec_return(n1->val + n2->val);
+        */
+    }
+}
+
+void exec_return(int n) { printf("= %d\n", n); }
diff --git a/src/grammar.y b/src/grammar.y
index 5611fa6..af95a11 100644
--- a/src/grammar.y
+++ b/src/grammar.y
@@ -2,9 +2,11 @@
     #include <stdio.h>
     #include "../../src/include/ast.h"
     #include "../../src/include/lexer.h"
-    
+
     int yylex(void);
     void yyerror(char const*);
+
+    AST* root = NULL;
 %}
 
 %code requires {
@@ -34,10 +36,10 @@ input:
 
 line:
     '\n'
-    | exp '\n' { printf("it worked. 👍\n"); }
+    | exp '\n' { root = $1; }
     ;
 
-exp: 
+exp:
     NUM { $$ = ast_init(AST_TYPE_NUM, ast_type_num_init($1)); }
     | NUM PLUS NUM {
         AST* argv[2] = {
diff --git a/src/include/exec.h b/src/include/exec.h
new file mode 100644
index 0000000..5a84546
--- /dev/null
+++ b/src/include/exec.h
@@ -0,0 +1,10 @@
+#ifndef EXEC_H
+#define EXEC_H
+
+#include "ast.h"
+
+void exec(AST* ast);
+void exec_call(AST* ast);
+void exec_return(int n);
+
+#endif
diff --git a/src/main.c b/src/main.c
index 449436d..5de1aef 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,13 +2,14 @@
 
 #include "include/ast.h"
 #include "include/dstr.h"
+#include "include/exec.h"
 #include "include/lexer.h"
 #include "include/util.h"
 
 #include "../build/grammars/grammar.tab.h"
 
 // Global Abstract Syntax Tree.
-AST* root = NULL;
+extern AST* root;
 
 extern int yyparse();
 
@@ -30,6 +31,7 @@ int main(int argc, char** argv) {
             lexer_print();
             if (yyparse() == 0) {
                 printf("Parsed successfully!\n");
+                exec(root);
             } else {
                 printf("Parse error.\n");
             }