protobuf/src/google/protobuf/stubs/stringprintf.h

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// Protocol Buffers - Google's data interchange format
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// from google3/base/stringprintf.h
//
// 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 GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H
#define GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H
 
#include <stdarg.h>
#include <string>
#include <vector>
 
#include <google/protobuf/stubs/common.h>
 
#include <google/protobuf/port_def.inc>
 
namespace google {
namespace protobuf {
 
// Return a C++ string
PROTOBUF_EXPORT extern std::string StringPrintf(const char* format, ...);
 
// Store result into a supplied string and return it
PROTOBUF_EXPORT extern const std::string& SStringPrintf(std::string* dst,
                                                        const char* format,
                                                        ...);
 
// Append result to a supplied string
PROTOBUF_EXPORT extern void StringAppendF(std::string* dst, const char* format,
                                          ...);
 
// Lower-level routine that takes a va_list and appends to a specified
// string.  All other routines are just convenience wrappers around it.
PROTOBUF_EXPORT extern void StringAppendV(std::string* dst, const char* format,
                                          va_list ap);
 
// The max arguments supported by StringPrintfVector
PROTOBUF_EXPORT extern const int kStringPrintfVectorMaxArgs;
 
// You can use this version when all your arguments are strings, but
// you don't know how many arguments you'll have at compile time.
// StringPrintfVector will LOG(FATAL) if v.size() > kStringPrintfVectorMaxArgs
PROTOBUF_EXPORT extern std::string StringPrintfVector(
    const char* format, const std::vector<std::string>& v);
 
}  // namespace protobuf
}  // namespace google
 
#include <google/protobuf/port_undef.inc>
 
#endif  // GOOGLE_PROTOBUF_STUBS_STRINGPRINTF_H