change the directory structurejarred/rename

1 files changed, 60 insertions, 0 deletions

diff --git a/src/bun.js/headergen/sizegen.cpp b/src/bun.js/headergen/sizegen.cpp
new file mode 100644
index 000000000..1249d93b1
--- /dev/null
+++ b/src/bun.js/headergen/sizegen.cpp
@@ -0,0 +1,60 @@
+#include <ctime>
+#include <fstream>
+#include <iostream>
+using namespace std;
+
+#include "root.h"
+
+#include "ZigGlobalObject.h"
+
+#include "Path.h"
+
+#include "DOMURL.h"
+
+#include "headers-cpp.h"
+
+#include "JavaScriptCore/CallFrame.h"
+
+int main() {
+  time_t rawtime;
+  struct tm *timeinfo;
+  char buf[80];
+
+  time(&rawtime);
+  timeinfo = localtime(&rawtime);
+
+  strftime(buf, 80, "%Y-%m-%d %H:%M:%s", timeinfo);
+
+  cout << "// Auto-generated by src/bun.js/headergen/sizegen.cpp at " << buf
+       << ".\n";
+  cout << "// These are the byte sizes for the different object types with "
+          "bindings in JavaScriptCore.\n";
+  cout << "// This allows us to safely return stack allocated C++ types to "
+          "Zig.\n";
+  cout << "// It is only safe to do this when these sizes are correct.\n";
+  cout << "// That means:\n";
+  cout << "// 1. We can't dynamically link JavaScriptCore\n";
+  cout << "// 2. It's important that this is run whenever JavaScriptCore is "
+          "updated or the bindings on the Zig side change.\n";
+  cout << "//    Failure to do so will lead to undefined behavior and probably "
+          "some frustrated people.\n";
+  cout << "// --- Regenerate this: --- \n";
+  cout << "// 1. \"make jsc-bindings-headers\"\n";
+  cout << "// 2. \"make sizegen\"\n";
+  cout << "// 3. \"make jsc-bindings-headers\"\n";
+  cout << "// ------------------------\n";
+  cout << "// You can verify the numbers written in this file at runtime via "
+          "the `extern`d types\n";
+  cout << "// Run \"jsc-bindings-headers\" twice because it uses these values "
+          "in the output. That's how all the bJSC__.* types are created - from "
+          "these values. \n";
+  int i = 0;
+  int len = sizeof(sizes) / sizeof(sizes[0]);
+  for (i = 0; i < len; i++) {
+    cout << "pub const " << names[i] << " = " << sizes[i] << ";\n";
+    cout << "pub const " << names[i] << "_align = " << aligns[i] << ";\n";
+  }
+  cout << "pub const Bun_FFI_PointerOffsetToArgumentsList = << "
+       << JSC::CallFrame::argumentOffset(0) << ";\n";
+  return 0;
+}
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