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gdcmString.h
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1 /*=========================================================================
2
3 Program: GDCM (Grassroots DICOM). A DICOM library
4
5 Copyright (c) 2006-2011 Mathieu Malaterre
6 All rights reserved.
7 See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
8
9 This software is distributed WITHOUT ANY WARRANTY; without even
10 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
11 PURPOSE. See the above copyright notice for more information.
12
13 =========================================================================*/
14 #ifndef GDCMSTRING_H
15 #define GDCMSTRING_H
16
17 #include "gdcmTypes.h"
18 #include "gdcmStaticAssert.h"
19
20 namespace gdcm
21 {
22
30 template <char TDelimiter = '\\', unsigned int TMaxLength = 64, char TPadChar = ' '>
31 class /*GDCM_EXPORT*/ String : public std::string /* PLEASE do not export me */
32 {
33 // UI wants \0 for pad character, while ASCII ones wants space char... do not allow anything else
34 GDCM_STATIC_ASSERT( TPadChar == ' ' || TPadChar == 0 );
35
36 public:
37 // typedef are not inherited:
38 typedef std::string::value_type value_type;
39 typedef std::string::pointer pointer;
40 typedef std::string::reference reference;
41 typedef std::string::const_reference const_reference;
42 typedef std::string::size_type size_type;
43 typedef std::string::difference_type difference_type;
44 typedef std::string::iterator iterator;
45 typedef std::string::const_iterator const_iterator;
46 typedef std::string::reverse_iterator reverse_iterator;
47 typedef std::string::const_reverse_iterator const_reverse_iterator;
48
50 String(): std::string() {}
51 String(const value_type* s): std::string(s)
52 {
53 if( size() % 2 )
54 {
55 push_back( TPadChar );
56 }
57 }
58 String(const value_type* s, size_type n): std::string(s, n)
59 {
60 // We are being passed a const char* pointer, so s[n] == 0 (garanteed!)
61 if( n % 2 )
62 {
63 push_back( TPadChar );
64 }
65 }
66 String(const std::string& s, size_type pos=0, size_type n=npos):
67 std::string(s, pos, n)
68 {
69 // FIXME: some users might already have padded the string 's' with a trailing \0...
70 if( size() % 2 )
71 {
72 push_back( TPadChar );
73 }
74 }
75
77 operator const char *() const { return this->c_str(); }
78
80 bool IsValid() const {
81 // Check Length:
82 size_type l = size();
83 if( l > TMaxLength ) return false;
84 return true;
85 }
86
87 gdcm::String<TDelimiter, TMaxLength, TPadChar> Truncate() const {
88 if( IsValid() ) return *this;
89 std::string str = *this; // copy
90 str.resize( TMaxLength );
91 return str;
92 }
93
96 std::string Trim() const {
97 std::string str = *this; // copy
98 std::string::size_type pos1 = str.find_first_not_of(' ');
99 std::string::size_type pos2 = str.find_last_not_of(' ');
100 str = str.substr( (pos1 == std::string::npos) ? 0 : pos1,
101 (pos2 == std::string::npos) ? (str.size() - 1) : (pos2 - pos1 + 1));
102 return str;
103 }
104
105 };
106 template <char TDelimiter, unsigned int TMaxLength, char TPadChar>
107 inline std::istream& operator>>(std::istream &is, String<TDelimiter,TMaxLength,TPadChar> &ms)
108 {
109 if(is)
110 {
111 std::getline(is, ms, TDelimiter);
112 // no such thing as std::get where the delim char would be left, so I need to manually add it back...
113 // hopefully this is the right thing to do (no overhead)
114 is.putback( TDelimiter );
115 }
116 return is;
117 }
118 //template <char TDelimiter = EOF, unsigned int TMaxLength = 64, char TPadChar = ' '>
119 //String String::Trim() const
120 //{
121 // String s;
122 // return s;
123 //}
124
125 } // end namespace gdcm
126
127 #endif //GDCMSTRING_H