clean up duplicated code

2 files changed, 6 insertions, 16 deletions

diff --git a/frontend/Exception.cpp b/frontend/Exception.cpp
index 423f4e9..c852f0a 100644
--- a/frontend/Exception.cpp
+++ b/frontend/Exception.cpp
@@ -1,30 +1,22 @@
 #include <cstdarg>
 #include <cstdio>
 #include <cstdlib>
+#include <cstring>
+
+#include "backend/String.h"
 
 #include "Exception.h"
 
 using namespace std;
 
 const char * Exception::what() {
-	return error.get();
-}
-
-void Exception::va_format(va_list args, const char * fmt) {
-	va_list args_copy;
-	va_copy(args_copy, args);
-	size_t sz = vsnprintf(NULL, 0, fmt, args_copy) + 1;
-	va_end(args_copy);
-
-	this->error = unique_ptr<char>(static_cast<char *>(malloc(sz)));
-
-	vsnprintf(this->error.get(), sz, fmt, args);
+	return this->error.get();
 }
 
 Exception::Exception(const char * fmt, ...) {
 	va_list args;
 	va_start(args, fmt);
-	va_format(args, fmt);
+	this->error = unique_ptr<char>(strdup(String::va_fmt(args, fmt).c_str()));
 	va_end(args);
 }
 
diff --git a/frontend/Exception.h b/frontend/Exception.h
index 633cb4f..3bbced2 100644
--- a/frontend/Exception.h
+++ b/frontend/Exception.h
@@ -1,6 +1,5 @@
 #pragma once
 
-#include <cstdarg>
 #include <exception>
 #include <memory>
 
@@ -11,7 +10,6 @@ public:
 
 protected:
 	Exception() = default;
-	void va_format(va_list args, const char * fmt);
-	std::unique_ptr<char> error = NULL;
+	std::unique_ptr<char> error;
 };