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