Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 1 | // © 2016 and later: Unicode, Inc. and others. |
| 2 | // License & terms of use: http://www.unicode.org/copyright.html |
| 3 | /* |
| 4 | ****************************************************************************** |
| 5 | * |
| 6 | * Copyright (C) 2016, International Business Machines |
| 7 | * Corporation and others. All Rights Reserved. |
| 8 | * |
| 9 | ****************************************************************************** |
| 10 | * |
| 11 | * File: cstr.h |
| 12 | */ |
| 13 | |
| 14 | #ifndef CSTR_H |
| 15 | #define CSTR_H |
| 16 | |
| 17 | #include "unicode/unistr.h" |
| 18 | #include "unicode/uobject.h" |
| 19 | #include "unicode/utypes.h" |
| 20 | |
| 21 | #include "charstr.h" |
| 22 | |
| 23 | /** |
| 24 | * ICU-internal class CStr, a small helper class to facilitate passing UnicodeStrings |
| 25 | * to functions needing (const char *) strings, such as printf(). |
| 26 | * |
| 27 | * It is intended primarily for use in debugging or in tests. Uses platform |
| 28 | * default code page conversion, which will do the best job possible, |
| 29 | * but may be lossy, depending on the platform. |
| 30 | * |
| 31 | * If no other conversion is available, use invariant conversion and substitue |
| 32 | * '?' for non-invariant characters. |
| 33 | * |
| 34 | * Example Usage: |
| 35 | * UnicodeString s = whatever; |
| 36 | * printf("%s", CStr(s)()); |
| 37 | * |
| 38 | * The explicit call to the CStr() constructor creates a temporary object. |
| 39 | * Operator () on the temporary object returns a (const char *) pointer. |
| 40 | * The lifetime of the (const char *) data is that of the temporary object, |
| 41 | * which works well when passing it as a parameter to another function, such as printf. |
| 42 | */ |
| 43 | |
| 44 | U_NAMESPACE_BEGIN |
| 45 | |
| 46 | class U_COMMON_API CStr : public UMemory { |
| 47 | public: |
| 48 | CStr(const UnicodeString &in); |
| 49 | ~CStr(); |
| 50 | const char * operator ()() const; |
| 51 | |
| 52 | private: |
| 53 | CharString s; |
| 54 | CStr(const CStr &other); // Forbid copying of this class. |
| 55 | CStr &operator =(const CStr &other); // Forbid assignment. |
| 56 | }; |
| 57 | |
| 58 | U_NAMESPACE_END |
| 59 | |
| 60 | #endif |