87 lines
3.5 KiB
C
87 lines
3.5 KiB
C
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/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef STDEXT_FORMAT_H
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#define STDEXT_FORMAT_H
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#include "traits.h"
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#include <string>
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#include <cstdio>
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#include <cassert>
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#include <tuple>
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#include <iostream>
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#include <sstream>
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#include <iomanip>
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namespace stdext {
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template<class T> void print_ostream(std::ostringstream& stream, const T& last) { stream << last; }
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template<class T, class... Args>
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void print_ostream(std::ostringstream& stream, const T& first, const Args&... rest) { stream << "\t" << first; print_ostream(stream, rest...); }
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template<class... T>
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/// Utility for printing variables just like lua
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void print(const T&... args) { std::ostringstream buf; print_ostream(buf, args...); std::cout << buf.str() << std::endl; }
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template<typename T>
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typename std::enable_if<std::is_integral<T>::value ||
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std::is_pointer<T>::value ||
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std::is_floating_point<T>::value ||
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std::is_enum<T>::value, T>::type sprintf_cast(const T& t) { return t; }
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inline const char *sprintf_cast(const std::string& s) { return s.c_str(); }
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template<int N> struct expand_snprintf {
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template<typename Tuple, typename... Args> static int call(char *s, size_t maxlen, const char *format, const Tuple& tuple, const Args&... args) {
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return expand_snprintf<N-1>::call(s, maxlen, format, tuple, sprintf_cast(std::get<N-1>(tuple)), args...); }};
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template<> struct expand_snprintf<0> {
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template<typename Tuple, typename... Args> static int call(char *s, size_t maxlen, const char *format, const Tuple& tuple, const Args&... args) {
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return snprintf(s, maxlen, format, args...); }};
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/// Improved snprintf that accepts std::string and other types
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template<typename... Args>
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int snprintf(char *s, size_t maxlen, const char *format, const Args&... args) {
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std::tuple<typename replace_extent<Args>::type...> tuple(args...);
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return expand_snprintf<std::tuple_size<decltype(tuple)>::value>::call(s, maxlen, format, tuple);
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}
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/// Format strings with the sprintf style, accepting std::string and string convertible types for %s
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template<typename... Args>
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std::string format(const std::string& format, const Args&... args) {
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int n, size = 1024;
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std::string str;
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while(true) {
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str.resize(size);
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n = snprintf(&str[0], size, format.c_str(), args...);
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assert(n != -1);
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if(n < size) {
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str.resize(n);
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return str;
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}
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size *= 2;
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}
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}
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}
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#endif
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