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// Formatting library for C++ - test utilities
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
// For the license information refer to format.h.
#include <cstdarg>
#include <cstdio>
#include <string>
#include "fmt/posix.h"
enum {BUFFER_SIZE = 256};
#ifdef _MSC_VER
# define FMT_VSNPRINTF vsprintf_s
# define FMT_VSNPRINTF vsnprintf
template <std::size_t SIZE>
void safe_sprintf(char (&buffer)[SIZE], const char *format, ...) {
std::va_list args;
va_start(args, format);
FMT_VSNPRINTF(buffer, SIZE, format, args);
// Increment a number in a string.
void increment(char *s);
std::string get_system_error(int error_code);
extern const char *const FILE_CONTENT;
// Opens a buffered file for reading.
fmt::buffered_file open_buffered_file(FILE **fp = FMT_NULL);
inline FILE *safe_fopen(const char *filename, const char *mode) {
#if defined(_WIN32) && !defined(__MINGW32__)
// Fix MSVC warning about "unsafe" fopen.
FILE *f = 0;
errno = fopen_s(&f, filename, mode);
return f;
return std::fopen(filename, mode);
template <typename Char>
class BasicTestString {
std::basic_string<Char> value_;
static const Char EMPTY[];
explicit BasicTestString(const Char *value = EMPTY) : value_(value) {}
const std::basic_string<Char> &value() const { return value_; }
template <typename Char>
const Char BasicTestString<Char>::EMPTY[] = {0};
typedef BasicTestString<char> TestString;
typedef BasicTestString<wchar_t> TestWString;
template <typename Char>
std::basic_ostream<Char> &operator<<(
std::basic_ostream<Char> &os, const BasicTestString<Char> &s) {
os << s.value();
return os;
class Date {
int year_, month_, day_;
Date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
int year() const { return year_; }
int month() const { return month_; }
int day() const { return day_; }