From 9b9a78524e21d4490cc4c4d194b83879e614ac45 Mon Sep 17 00:00:00 2001
From: Kolten Pearson <koltenpearson@gmail.com>
Date: Fri, 28 Apr 2023 23:53:23 -0600
Subject: [PATCH] made initial structure for new way of handling c bindings

---
 build_c.sh                | 12 ++++++++++++
 c_bindings/main.c         | 13 +++++++++++++
 c_bindings/pocketpy_c.cpp | 21 +++++++++++++++++++++
 c_bindings/pocketpy_c.h   | 20 ++++++++++++++++++++
 src/pocketpy.h            |  4 +++-
 5 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 build_c.sh
 create mode 100644 c_bindings/main.c
 create mode 100644 c_bindings/pocketpy_c.cpp
 create mode 100644 c_bindings/pocketpy_c.h

diff --git a/build_c.sh b/build_c.sh
new file mode 100644
index 00000000..6d7355d3
--- /dev/null
+++ b/build_c.sh
@@ -0,0 +1,12 @@
+python3 preprocess.py
+
+echo "compiling c++ lib"
+clang++ -c -o pocketpy_c.o c_bindings/pocketpy_c.cpp -Wfatal-errors --std=c++17 -O2 -Wall -Wno-sign-compare -Wno-unused-variable -fno-rtti -stdlib=libc++ -I src/
+echo "compiling c executable"
+clang -c -o main.o c_bindings/main.c -Wfatal-errors -O2 -Wall -Wno-sign-compare -Wno-unused-variable -I src/
+echo "linking"
+clang++ -o pocketpy_c main.o pocketpy_c.o -stdlib=libc++
+echo "cleaning up"
+rm pocketpy_c.o
+rm main.o
+
diff --git a/c_bindings/main.c b/c_bindings/main.c
new file mode 100644
index 00000000..04290ebf
--- /dev/null
+++ b/c_bindings/main.c
@@ -0,0 +1,13 @@
+#include "pocketpy_c.h"
+
+
+int main(int argc, char** argv) {
+
+    pkpy_vm vm = pkpy_vm_create(true, true);
+
+    pkpy_vm_exec(vm, "print('hello world!')");
+
+    pkpy_vm_destroy(vm);
+
+    return 0;
+}
diff --git a/c_bindings/pocketpy_c.cpp b/c_bindings/pocketpy_c.cpp
new file mode 100644
index 00000000..152ea532
--- /dev/null
+++ b/c_bindings/pocketpy_c.cpp
@@ -0,0 +1,21 @@
+#include "pocketpy.h"
+#include "pocketpy_c.h"
+
+pkpy_vm pkpy_vm_create(bool use_stdio, bool enable_os) {
+    pkpy::VM* p = new pkpy::VM(use_stdio, enable_os);
+
+    return (pkpy_vm) p;
+}
+
+void pkpy_vm_exec(pkpy_vm vm_handle, const char* source) {
+    pkpy::VM* vm = (pkpy::VM*) vm_handle;
+
+    vm->exec(source, "main.py", pkpy::EXEC_MODE);
+}
+
+void pkpy_vm_destroy(pkpy_vm vm_handle) {
+    pkpy::VM* vm = (pkpy::VM*) vm_handle;
+
+    delete vm;
+}
+
diff --git a/c_bindings/pocketpy_c.h b/c_bindings/pocketpy_c.h
new file mode 100644
index 00000000..12672495
--- /dev/null
+++ b/c_bindings/pocketpy_c.h
@@ -0,0 +1,20 @@
+#ifndef POCKETPY_C_H 
+#define POCKETPY_C_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+
+typedef struct pkpy_vm_handle* pkpy_vm;
+
+pkpy_vm pkpy_vm_create(bool use_stdio, bool enable_os);
+void pkpy_vm_exec(pkpy_vm vm_handle, const char* source);
+void pkpy_vm_destroy(pkpy_vm vm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/pocketpy.h b/src/pocketpy.h
index 2501c396..db49cbfa 100644
--- a/src/pocketpy.h
+++ b/src/pocketpy.h
@@ -975,6 +975,7 @@ inline void VM::post_init(){
 }   // namespace pkpy
 
 /*************************GLOBAL NAMESPACE*************************/
+/*
 static std::map<void*, void(*)(void*)> _pk_deleter_map;
 
 extern "C" {
@@ -1046,4 +1047,5 @@ extern "C" {
         std::string json = vm->read_output();
         return strdup(json.c_str());
     }
-}
\ No newline at end of file
+
+}*/