Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "upb/reflection/internal/strdup2.h"
#include <string.h>
#include "upb/mem/arena.h"
// Must be last.
#include "upb/port/def.inc"
char* upb_strdup2(const char* s, size_t len, upb_Arena* a) {
size_t n;
char* p;
// Prevent overflow errors.
if (len == SIZE_MAX) return NULL;
// Always null-terminate, even if binary data; but don't rely on the input to
// have a null-terminating byte since it may be a raw binary buffer.
n = len + 1;
p = upb_Arena_Malloc(a, n);
if (p) {
if (len != 0) memcpy(p, s, len);
p[len] = 0;
}
return p;
}