Trying to fix sloppy comparison (#186)

* Trying to fix sloppy comparison https://github.com/nbs-system/snuffleupagus/issues/10 by
modifying php's opcode

1 files changed, 39 insertions, 0 deletions

diff --git a/src/sp_sloppy.c b/src/sp_sloppy.c
new file mode 100644
index 0000000..05d2505
--- /dev/null
+++ b/src/sp_sloppy.c
@@ -0,0 +1,39 @@
+#include "sp_sloppy.h"
+
+ZEND_API zend_op_array* (*zend_compile_file_default)(zend_file_handle* file_handle, int type) = NULL;
+ZEND_API zend_op_array* (*zend_compile_string_default)(zval* source_string, char* filename) = NULL;
+
+static void modify_opcode(zend_op_array* opline) {
+  if (NULL != opline) {
+    zend_op* orig_opline = opline->opcodes;
+    for (; NULL != orig_opline->handler; orig_opline++) {
+      if (orig_opline->opcode == ZEND_IS_EQUAL) {
+        orig_opline->opcode = ZEND_IS_IDENTICAL;
+        zend_vm_set_opcode_handler(orig_opline);
+      } else if (orig_opline->opcode == ZEND_IS_NOT_EQUAL) {
+        orig_opline->opcode = ZEND_IS_NOT_IDENTICAL;
+        zend_vm_set_opcode_handler(orig_opline);
+      }
+    }
+  }
+}
+
+ZEND_API zend_op_array* sp_compile_string(zval* source_string, char* filename) {
+  zend_op_array* opline = zend_compile_string_default(source_string, filename);
+  modify_opcode(opline);
+  return opline;
+}
+
+ZEND_API zend_op_array* sp_compile_file(zend_file_handle* file_handle, int type) {
+  zend_op_array* opline = zend_compile_file_default(file_handle, type);
+  modify_opcode(opline);
+  return opline;
+}
+
+void hook_sloppy() {
+  zend_compile_file_default = zend_compile_file;
+  zend_compile_file = sp_compile_file;
+
+  zend_compile_string_default = zend_compile_string;
+  zend_compile_string = sp_compile_string;
+}