tibia-client/src/framework/stdext/format.h

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/*
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* Copyright (c) 2010-2015 OTClient <https://github.com/edubart/otclient>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef STDEXT_FORMAT_H
#define STDEXT_FORMAT_H
#include "traits.h"
#include <string>
#include <cstdio>
#include <cassert>
#include <tuple>
#include <iostream>
#include <sstream>
#include <iomanip>
namespace stdext {
template<class T> void print_ostream(std::ostringstream& stream, const T& last) { stream << last; }
template<class T, class... Args>
void print_ostream(std::ostringstream& stream, const T& first, const Args&... rest) { stream << "\t" << first; print_ostream(stream, rest...); }
template<class... T>
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// Utility for printing variables just like lua
void print(const T&... args) { std::ostringstream buf; print_ostream(buf, args...); std::cout << buf.str() << std::endl; }
template<typename T>
typename std::enable_if<std::is_integral<T>::value ||
std::is_pointer<T>::value ||
std::is_floating_point<T>::value ||
std::is_enum<T>::value, T>::type sprintf_cast(const T& t) { return t; }
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inline const char *sprintf_cast(const char *s) { return s; }
inline const char *sprintf_cast(const std::string& s) { return s.c_str(); }
template<int N> struct expand_snprintf {
template<typename Tuple, typename... Args> static int call(char *s, size_t maxlen, const char *format, const Tuple& tuple, const Args&... args) {
return expand_snprintf<N-1>::call(s, maxlen, format, tuple, sprintf_cast(std::get<N-1>(tuple)), args...); }};
template<> struct expand_snprintf<0> {
template<typename Tuple, typename... Args> static int call(char *s, size_t maxlen, const char *format, const Tuple& tuple, const Args&... args) {
#ifdef _MSC_VER
return _snprintf(s, maxlen, format, args...);
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#else
return snprintf(s, maxlen, format, args...);
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#endif
}
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};
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// Improved snprintf that accepts std::string and other types
template<typename... Args>
int snprintf(char *s, size_t maxlen, const char *format, const Args&... args) {
std::tuple<typename replace_extent<Args>::type...> tuple(args...);
return expand_snprintf<std::tuple_size<decltype(tuple)>::value>::call(s, maxlen, format, tuple);
}
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template<typename... Args>
inline int snprintf(char *s, size_t maxlen, const char *format) {
std::strncpy(s, format, maxlen);
s[maxlen-1] = 0;
return strlen(s);
}
template<typename... Args>
inline std::string format() { return std::string(); }
template<typename... Args>
inline std::string format(const std::string& format) { return format; }
// Format strings with the sprintf style, accepting std::string and string convertible types for %s
template<typename... Args>
std::string format(const std::string& format, const Args&... args) {
int n, size = 1024;
std::string str;
while(true) {
str.resize(size);
n = snprintf(&str[0], size, format.c_str(), args...);
assert(n != -1);
if(n < size) {
str.resize(n);
return str;
}
size *= 2;
}
}
}
#endif