1 // Ceres Solver - A fast non-linear least squares minimizer 2 // Copyright 2010, 2011, 2012 Google Inc. All rights reserved. 3 // http://code.google.com/p/ceres-solver/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are met: 7 // 8 // * Redistributions of source code must retain the above copyright notice, 9 // this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above copyright notice, 11 // this list of conditions and the following disclaimer in the documentation 12 // and/or other materials provided with the distribution. 13 // * Neither the name of Google Inc. nor the names of its contributors may be 14 // used to endorse or promote products derived from this software without 15 // specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 // POSSIBILITY OF SUCH DAMAGE. 28 // 29 // Author: Sanjay Ghemawat 30 // 31 // Printf variants that place their output in a C++ string. 32 // 33 // Usage: 34 // string result = StringPrintf("%d %s\n", 10, "hello"); 35 // SStringPrintf(&result, "%d %s\n", 10, "hello"); 36 // StringAppendF(&result, "%d %s\n", 20, "there"); 37 38 #ifndef CERES_INTERNAL_STRINGPRINTF_H_ 39 #define CERES_INTERNAL_STRINGPRINTF_H_ 40 41 #include <cstdarg> 42 #include <string> 43 44 #include "ceres/internal/port.h" 45 46 namespace ceres { 47 namespace internal { 48 49 #if (defined(__GNUC__) || defined(__clang__)) 50 // Tell the compiler to do printf format string checking if the compiler 51 // supports it; see the 'format' attribute in 52 // <http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Function-Attributes.html>. 53 // 54 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods 55 // have an implicit 'this' argument, the arguments of such methods 56 // should be counted from two, not one." 57 #define CERES_PRINTF_ATTRIBUTE(string_index, first_to_check) \ 58 __attribute__((__format__ (__printf__, string_index, first_to_check))) 59 #define CERES_SCANF_ATTRIBUTE(string_index, first_to_check) \ 60 __attribute__((__format__ (__scanf__, string_index, first_to_check))) 61 #else 62 #define CERES_PRINTF_ATTRIBUTE(string_index, first_to_check) 63 #endif 64 65 // Return a C++ string. 66 extern string StringPrintf(const char* format, ...) 67 // Tell the compiler to do printf format string checking. 68 CERES_PRINTF_ATTRIBUTE(1, 2); 69 70 // Store result into a supplied string and return it. 71 extern const string& SStringPrintf(string* dst, const char* format, ...) 72 // Tell the compiler to do printf format string checking. 73 CERES_PRINTF_ATTRIBUTE(2, 3); 74 75 // Append result to a supplied string. 76 extern void StringAppendF(string* dst, const char* format, ...) 77 // Tell the compiler to do printf format string checking. 78 CERES_PRINTF_ATTRIBUTE(2, 3); 79 80 // Lower-level routine that takes a va_list and appends to a specified string. 81 // All other routines are just convenience wrappers around it. 82 extern void StringAppendV(string* dst, const char* format, va_list ap); 83 84 #undef CERES_PRINTF_ATTRIBUTE 85 86 } // namespace internal 87 } // namespace ceres 88 89 #endif // CERES_INTERNAL_STRINGPRINTF_H_ 90
