// Copyright 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef BASE_STRINGS_STRINGPRINTF_H_ #define BASE_STRINGS_STRINGPRINTF_H_ #include // va_list #include #include "base/base_export.h" #include "base/compiler_specific.h" #include "build/build_config.h" namespace base { // Return a C++ string given printf-like input. [[nodiscard]] BASE_EXPORT std::string StringPrintf(const char* format, ...) PRINTF_FORMAT(1, 2); #if BUILDFLAG(IS_WIN) // Note: Unfortunately compile time checking of the format string for UTF-16 // strings is not supported by any compiler, thus these functions should be used // carefully and sparingly. Also applies to SStringPrintf and StringAppendV // below. [[nodiscard]] BASE_EXPORT std::wstring StringPrintf(const wchar_t* format, ...) WPRINTF_FORMAT(1, 2); [[nodiscard]] BASE_EXPORT std::u16string StringPrintf(const char16_t* format, ...) WPRINTF_FORMAT(1, 2); #endif // Return a C++ string given vprintf-like input. [[nodiscard]] BASE_EXPORT std::string StringPrintV(const char* format, va_list ap) PRINTF_FORMAT(1, 0); // Store result into a supplied string and return it. BASE_EXPORT const std::string& SStringPrintf(std::string* dst, const char* format, ...) PRINTF_FORMAT(2, 3); #if BUILDFLAG(IS_WIN) BASE_EXPORT const std::wstring& SStringPrintf(std::wstring* dst, const wchar_t* format, ...) WPRINTF_FORMAT(2, 3); BASE_EXPORT const std::u16string& SStringPrintf(std::u16string* dst, const char16_t* format, ...) WPRINTF_FORMAT(2, 3); #endif // Append result to a supplied string. BASE_EXPORT void StringAppendF(std::string* dst, const char* format, ...) PRINTF_FORMAT(2, 3); #if BUILDFLAG(IS_WIN) BASE_EXPORT void StringAppendF(std::wstring* dst, const wchar_t* format, ...) WPRINTF_FORMAT(2, 3); BASE_EXPORT void StringAppendF(std::u16string* dst, const char16_t* format, ...) WPRINTF_FORMAT(2, 3); #endif // Lower-level routine that takes a va_list and appends to a specified // string. All other routines are just convenience wrappers around it. BASE_EXPORT void StringAppendV(std::string* dst, const char* format, va_list ap) PRINTF_FORMAT(2, 0); #if BUILDFLAG(IS_WIN) BASE_EXPORT void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap) WPRINTF_FORMAT(2, 0); BASE_EXPORT void StringAppendV(std::u16string* dst, const char16_t* format, va_list ap) WPRINTF_FORMAT(2, 0); #endif } // namespace base #endif // BASE_STRINGS_STRINGPRINTF_H_