| // Copyright (c) 2010 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. |
| // |
| // This file defines preprocessor macros for stringizing preprocessor |
| // symbols (or their output) and manipulating preprocessor symbols |
| // that define strings. |
| |
| #ifndef BASE_STRINGIZE_MACROS_H_ |
| #define BASE_STRINGIZE_MACROS_H_ |
| |
| #include "build/build_config.h" |
| |
| // This is not very useful as it does not expand defined symbols if |
| // called directly. Use its counterpart without the _NO_EXPANSION |
| // suffix, below. |
| #define STRINGIZE_NO_EXPANSION(x) #x |
| |
| // Use this to quote the provided parameter, first expanding it if it |
| // is a preprocessor symbol. |
| // |
| // For example, if: |
| // #define A FOO |
| // #define B(x) myobj->FunctionCall(x) |
| // |
| // Then: |
| // STRINGIZE(A) produces "FOO" |
| // STRINGIZE(B(y)) produces "myobj->FunctionCall(y)" |
| #define STRINGIZE(x) STRINGIZE_NO_EXPANSION(x) |
| |
| // The following are defined only on Windows (for use when interacting |
| // with Windows APIs) as wide strings are otherwise deprecated. |
| #if defined(OS_WIN) |
| |
| // Second-level utility macros to let us expand symbols. |
| #define LSTRINGIZE_NO_EXPANSION(x) L ## #x |
| #define TO_L_STRING_NO_EXPANSION(x) L ## x |
| |
| // L version of STRINGIZE(). For examples above, |
| // LSTRINGIZE(A) produces L"FOO" |
| // LSTRINGIZE(B(y)) produces L"myobj->FunctionCall(y)" |
| #define LSTRINGIZE(x) LSTRINGIZE_NO_EXPANSION(x) |
| |
| // Adds an L in front of an existing ASCII string constant (after |
| // expanding symbols). Does not do any quoting. |
| // |
| // For example, if: |
| // #define C "foo" |
| // |
| // Then: |
| // TO_L_STRING(C) produces L"foo" |
| #define TO_L_STRING(x) TO_L_STRING_NO_EXPANSION(x) |
| |
| #endif // defined(OS_WIN) |
| |
| #endif // BASE_STRINGIZE_MACROS_H_ |
