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// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
//
// 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
//
// https://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.
#include <contrib/restricted/google/boringssl/include/openssl/buf.h>
#include <string.h>
#include <contrib/restricted/google/boringssl/include/openssl/err.h>
#include <contrib/restricted/google/boringssl/include/openssl/mem.h>
#include "../internal.h"
#include "../mem_internal.h"
using namespace bssl;
BUF_MEM *BUF_MEM_new() { return New<BUF_MEM>(); }
void BUF_MEM_free(BUF_MEM *buf) {
if (buf == nullptr) {
return;
}
OPENSSL_free(buf->data);
Delete(buf);
}
int BUF_MEM_reserve(BUF_MEM *buf, size_t cap) {
if (buf->max >= cap) {
return 1;
}
size_t n = cap + 3;
if (n < cap) {
OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
return 0;
}
n = n / 3;
size_t alloc_size = n * 4;
if (alloc_size / 4 != n) {
OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
return 0;
}
char *new_buf =
reinterpret_cast<char *>(OPENSSL_realloc(buf->data, alloc_size));
if (new_buf == nullptr) {
return 0;
}
buf->data = new_buf;
buf->max = alloc_size;
return 1;
}
size_t BUF_MEM_grow(BUF_MEM *buf, size_t len) {
if (!BUF_MEM_reserve(buf, len)) {
return 0;
}
if (buf->length < len) {
OPENSSL_memset(&buf->data[buf->length], 0, len - buf->length);
}
buf->length = len;
return len;
}
size_t BUF_MEM_grow_clean(BUF_MEM *buf, size_t len) {
return BUF_MEM_grow(buf, len);
}
int BUF_MEM_append(BUF_MEM *buf, const void *in, size_t len) {
// Work around a C language bug. See https://crbug.com/1019588.
if (len == 0) {
return 1;
}
size_t new_len = buf->length + len;
if (new_len < len) {
OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
return 0;
}
if (!BUF_MEM_reserve(buf, new_len)) {
return 0;
}
OPENSSL_memcpy(buf->data + buf->length, in, len);
buf->length = new_len;
return 1;
}
char *BUF_strdup(const char *str) { return OPENSSL_strdup(str); }
size_t BUF_strnlen(const char *str, size_t max_len) {
return OPENSSL_strnlen(str, max_len);
}
char *BUF_strndup(const char *str, size_t size) {
return OPENSSL_strndup(str, size);
}
size_t BUF_strlcpy(char *dst, const char *src, size_t dst_size) {
return OPENSSL_strlcpy(dst, src, dst_size);
}
size_t BUF_strlcat(char *dst, const char *src, size_t dst_size) {
return OPENSSL_strlcat(dst, src, dst_size);
}
void *BUF_memdup(const void *data, size_t size) {
return OPENSSL_memdup(data, size);
}
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