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-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
10 #define LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
11 
12 #include "fuzzing/math/Compare.h"
13 
14 #include <stddef.h>
15 #include <stdint.h>
16 
17 template <typename T> using StringInputSingleOutputFunc = T (*)(const char *);
18 
19 template <typename T>
StringParserOutputDiff(StringInputSingleOutputFunc<T> func1,StringInputSingleOutputFunc<T> func2,const uint8_t * data,size_t size)20 void 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 
35 #endif // LLVM_LIBC_FUZZING_STDLIB_STRING_PARSER_OUTPUT_DIFF_H
36