// Copyright 2023 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#define _GNU_SOURCE
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>

int vasprintf(char **s, const char *fmt, va_list ap)
{
	va_list ap2;
	va_copy(ap2, ap);
	int l = vsnprintf(0, 0, fmt, ap2);
	va_end(ap2);

	if (l<0 || !(*s=malloc(l+1U))) return -1;
	return vsnprintf(*s, l+1U, fmt, ap);
}