1 //----------------------------------------------------------------------
2 // This software is part of the Haiku distribution and is covered
3 // by the MIT License.
4 //
5 // Copyright (c) 2003 Tyler Dauwalder, tyler@dauwalder.net
6 //---------------------------------------------------------------------
7
8 #ifndef _UDF_STRING_H
9 #define _UDF_STRING_H
10
11 #include <stdio.h>
12
13 #include "Array.h"
14 #include "UdfDebug.h"
15
16 #include <new>
17 #include <string.h>
18
19
20 /*! \brief UdfString class that takes as input either a UTF8 string or a
21 CS0 unicode string and then provides access to said string in both
22 formats.
23
24 For CS0 info, see: ECMA-167 1/7.2.2 (not very helpful), UDF-2.01 2.1.1
25 */
26 class UdfString {
27 public:
28 UdfString();
29 UdfString(const char *utf8);
30 UdfString(const char *cs0, uint32 length);
31
32 template <uint32 length>
33 UdfString(const array<char, length> &dString);
34 ~UdfString();
35
36 void SetTo(const char *utf8);
37 void SetTo(const char *cs0, uint32 length);
38 template <uint32 length>
39 void SetTo(const array<char, length> &dString);
40
41 template <uint32 length>
42 UdfString& operator=(const array<char, length> &dString);
43
Cs0()44 const char *Cs0() const { return fCs0String; }
Utf8()45 const char *Utf8() const { return fUtf8String; }
Cs0Length()46 uint32 Cs0Length() const { return fCs0Length; }
Utf8Length()47 uint32 Utf8Length() const { return fUtf8String ? strlen(fUtf8String) : 0; }
48
49 private:
50 void _Clear();
51
52 char *fCs0String;
53 uint32 fCs0Length;
54 char *fUtf8String;
55 };
56
57 /*! \brief Creates a new UdfString object from the given d-string.
58 */
59 template <uint32 length>
UdfString(const array<char,length> & dString)60 UdfString::UdfString(const array<char, length> &dString)
61 : fCs0String(NULL)
62 , fUtf8String(NULL)
63 {
64 TRACE(("UdfString::UdfString: dString.length(): %" B_PRIu32,
65 dString.length()));
66 SetTo(dString);
67 }
68
69 /*! \brief Assignment from a d-string.
70
71 The last byte of a d-string specifies the data length of the
72 enclosed Cs0 string.
73 */
74 template <uint32 length>
75 void
SetTo(const array<char,length> & dString)76 UdfString::SetTo(const array<char, length> &dString)
77 {
78 uint8 dataLength = dString.length() == 0
79 ? 0 : reinterpret_cast<const uint8 *>(dString.data)[dString.length() - 1];
80 if (dataLength == 0
81 || dataLength == 1 /* technically illegal, but... */) {
82 SetTo(NULL);
83 } else {
84 if (dataLength > dString.length() - 1)
85 dataLength = dString.length() - 1;
86 SetTo(reinterpret_cast<const char *>(dString.data), dataLength);
87 }
88 }
89
90 /*! \brief Assignment from a d-string.
91 */
92 template <uint32 length>
93 UdfString&
94 UdfString::operator=(const array<char, length> &dString)
95 {
96 SetTo(dString);
97 return *this;
98 }
99
100 #endif // _UDF_STRING_H
101