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1//===-- Template to diff single-input-single-output functions ---*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H10#define LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H11 12#include "fuzzing/math/Compare.h"13 14#include <stddef.h>15#include <stdint.h>16 17template <typename T> using StringInputSingleOutputFunc = T (*)(const char *);18 19template <typename T>20void StringParserOutputDiff(StringInputSingleOutputFunc<T> func1,21 StringInputSingleOutputFunc<T> func2,22 const uint8_t *data, size_t size) {23 if (size < sizeof(T))24 return;25 26 const char *x = reinterpret_cast<const char *>(data);27 28 T result1 = func1(x);29 T result2 = func2(x);30 31 if (!ValuesEqual(result1, result2))32 __builtin_trap();33}34 35template <typename T>36using StringToNumberFunc = T (*)(const char *, char **, int);37 38template <typename T>39void StringToNumberOutputDiff(StringToNumberFunc<T> func1,40 StringToNumberFunc<T> func2, const uint8_t *data,41 size_t size) {42 if (size < sizeof(T))43 return;44 45 const char *x = reinterpret_cast<const char *>(data + 1);46 int base = data[0] % 36;47 base = base + ((base == 0) ? 0 : 1);48 49 char *outPtr1 = nullptr;50 char *outPtr2 = nullptr;51 52 T result1 = func1(x, &outPtr1, base);53 T result2 = func2(x, &outPtr2, base);54 55 if (!(ValuesEqual(result1, result2) && (*outPtr1 == *outPtr2)))56 __builtin_trap();57}58 59#endif // LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H60