chromium/third_party/protobuf/src/google/protobuf/stubs/stringprintf.cc

// Protocol Buffers - Google's data interchange format
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// from google3/base/stringprintf.cc

#include <google/protobuf/stubs/stringprintf.h>

#include <errno.h>
#include <stdarg.h> // For va_list and related operations
#include <stdio.h> // MSVC requires this for _vsnprintf
#include <vector>

#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/logging.h>

namespace google {
namespace protobuf {

#ifdef _MSC_VER
#ifndef va_copy
// Define va_copy for MSVC. This is a hack, assuming va_list is simply a
// pointer into the stack and is safe to copy.
#define va_copy …
#endif
#endif

void StringAppendV(std::string* dst, const char* format, va_list ap) { … }

std::string StringPrintf(const char* format, ...) { … }

const std::string& SStringPrintf(std::string* dst, const char* format, ...) { … }

void StringAppendF(std::string* dst, const char* format, ...) { … }

// Max arguments supported by StringPrintVector
const int kStringPrintfVectorMaxArgs = …;

// An empty block of zero for filler arguments.  This is const so that if
// printf tries to write to it (via %n) then the program gets a SIGSEGV
// and we can fix the problem or protect against an attack.
static const char string_printf_empty_block[256] = …;

std::string StringPrintfVector(const char* format,
                               const std::vector<std::string>& v) { … }
}  // namespace protobuf
}  // namespace google