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/*
*
* Copyright 2018 gRPC authors.
*
* 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.
*
*/
#include "test/core/util/fuzzer_util.h"
#include <grpc/support/alloc.h>
#include "src/core/lib/gpr/useful.h"
namespace grpc_core {
namespace testing {
uint8_t grpc_fuzzer_get_next_byte(input_stream* inp) {
if (inp->cur == inp->end) {
return 0;
}
return *inp->cur++;
}
char* grpc_fuzzer_get_next_string(input_stream* inp, bool* special) {
char* str = nullptr;
size_t cap = 0;
size_t sz = 0;
char c;
do {
if (cap == sz) {
cap = GPR_MAX(3 * cap / 2, cap + 8);
str = static_cast<char*>(gpr_realloc(str, cap));
}
c = static_cast<char>(grpc_fuzzer_get_next_byte(inp));
str[sz++] = c;
} while (c != 0 && c != 1);
if (special != nullptr) {
*special = (c == 1);
}
if (c == 1) {
str[sz - 1] = 0;
}
return str;
}
uint32_t grpc_fuzzer_get_next_uint32(input_stream* inp) {
uint8_t b = grpc_fuzzer_get_next_byte(inp);
uint32_t x = b & 0x7f;
if (b & 0x80) {
x <<= 7;
b = grpc_fuzzer_get_next_byte(inp);
x |= b & 0x7f;
if (b & 0x80) {
x <<= 7;
b = grpc_fuzzer_get_next_byte(inp);
x |= b & 0x7f;
if (b & 0x80) {
x <<= 7;
b = grpc_fuzzer_get_next_byte(inp);
x |= b & 0x7f;
if (b & 0x80) {
x = (x << 4) | (grpc_fuzzer_get_next_byte(inp) & 0x0f);
}
}
}
}
return x;
}
} // namespace testing
} // namespace grpc_core
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