1// Copyright 2002 and onwards Google Inc.
2//
3// Printf variants that place their output in a C++ string.
4//
5// Usage:
6// string result = StringPrintf("%d %s\n", 10, "hello");
7// SStringPrintf(&result, "%d %s\n", 10, "hello");
8// StringAppendF(&result, "%d %s\n", 20, "there");
9
10#ifndef _BASE_STRINGPRINTF_H
11#define _BASE_STRINGPRINTF_H
12
13#include <stdarg.h>
14#include <string>
15using std::string;
16
17#include <vector>
18using std::vector;
19
20#include "base/stl_decl.h"
21#include "base/port.h"
22
23// Return a C++ string
24extern string StringPrintf(const char* format, ...)
25 // Tell the compiler to do printf format string checking.
26 PRINTF_ATTRIBUTE(1,2);
27
28// Store result into a supplied string and return it
29extern const string& SStringPrintf(string* dst, const char* format, ...)
30 // Tell the compiler to do printf format string checking.
31 PRINTF_ATTRIBUTE(2,3);
32
33// Append result to a supplied string
34extern void StringAppendF(string* dst, const char* format, ...)
35 // Tell the compiler to do printf format string checking.
36 PRINTF_ATTRIBUTE(2,3);
37
38// Lower-level routine that takes a va_list and appends to a specified
39// string. All other routines are just convenience wrappers around it.
40extern void StringAppendV(string* dst, const char* format, va_list ap);
41
42#endif /* _BASE_STRINGPRINTF_H */
43