| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889 | // Ceres Solver - A fast non-linear least squares minimizer// Copyright 2015 Google Inc. All rights reserved.// http://ceres-solver.org///// Redistribution and use in source and binary forms, with or without// modification, are permitted provided that the following conditions are met://// * Redistributions of source code must retain the above copyright notice,//   this list of conditions and the following disclaimer.// * Redistributions in binary form must reproduce the above copyright notice,//   this list of conditions and the following disclaimer in the documentation//   and/or other materials provided with the distribution.// * Neither the name of Google Inc. nor the names of its contributors may be//   used to endorse or promote products derived from this software without//   specific prior written permission.//// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE// POSSIBILITY OF SUCH DAMAGE.//// Author: Sanjay Ghemawat//// Printf variants that place their output in a C++ string.//// Usage://      string result = StringPrintf("%d %s\n", 10, "hello");//      SStringPrintf(&result, "%d %s\n", 10, "hello");//      StringAppendF(&result, "%d %s\n", 20, "there");#ifndef CERES_INTERNAL_STRINGPRINTF_H_#define CERES_INTERNAL_STRINGPRINTF_H_#include <cstdarg>#include <string>#include "ceres/internal/port.h"namespace ceres {namespace internal {#if (defined(__GNUC__) || defined(__clang__))// Tell the compiler to do printf format string checking if the compiler// supports it; see the 'format' attribute in// <http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Function-Attributes.html>.//// N.B.: As the GCC manual states, "[s]ince non-static C++ methods// have an implicit 'this' argument, the arguments of such methods// should be counted from two, not one."#define CERES_PRINTF_ATTRIBUTE(string_index, first_to_check) \    __attribute__((__format__ (__printf__, string_index, first_to_check)))#define CERES_SCANF_ATTRIBUTE(string_index, first_to_check) \    __attribute__((__format__ (__scanf__, string_index, first_to_check)))#else#define CERES_PRINTF_ATTRIBUTE(string_index, first_to_check)#endif// Return a C++ string.extern std::string StringPrintf(const char* format, ...)    // Tell the compiler to do printf format string checking.    CERES_PRINTF_ATTRIBUTE(1, 2);// Store result into a supplied string and return it.extern const std::string& SStringPrintf(std::string* dst, const char* format, ...)    // Tell the compiler to do printf format string checking.    CERES_PRINTF_ATTRIBUTE(2, 3);// Append result to a supplied string.extern void StringAppendF(std::string* dst, const char* format, ...)    // Tell the compiler to do printf format string checking.    CERES_PRINTF_ATTRIBUTE(2, 3);// Lower-level routine that takes a va_list and appends to a specified string.// All other routines are just convenience wrappers around it.extern void StringAppendV(std::string* dst, const char* format, va_list ap);#undef CERES_PRINTF_ATTRIBUTE}  // namespace internal}  // namespace ceres#endif  // CERES_INTERNAL_STRINGPRINTF_H_
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