libxsde/xsde/cxx/string-sequence.cxx


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184

// file      : xsde/cxx/string-sequence.cxx
// author    : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2005-2011 Code Synthesis Tools CC
// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file

#include <string.h> // strcmp

#include <xsde/cxx/strdupx.hxx>
#include <xsde/cxx/string-sequence.hxx>

namespace xsde
{
  namespace cxx
  {
    void string_sequence::
    clear ()
    {
      for (size_t i = 0;  i < size_; ++i)
#ifndef XSDE_CUSTOM_ALLOCATOR
        delete[] static_cast<char**> (data_)[i];
#else
        cxx::free (static_cast<char**> (data_)[i]);
#endif

      size_ = 0;
    }

#ifdef XSDE_EXCEPTIONS
    void string_sequence::
    push_back_copy (const char* cs)
    {
      if (capacity_ < size_ + 1)
        grow_ (0, sizeof (char*), 0);

      static_cast<char**> (data_)[size_++] = strdupx (cs);
    }

    void string_sequence::
    copy (string_sequence& c) const
    {
      if (c.size_ != 0)
        c.clear ();

      c.reserve (size_);

      for (; c.size_ < size_; ++c.size_)
      {
        static_cast<char**> (c.data_)[c.size_] =
          strdupx (static_cast<char**> (data_)[c.size_]);
      }
    }

    struct string_sequence_guard
    {
      string_sequence_guard (string_sequence* p) : p_ (p) {}

      ~string_sequence_guard ()
      {
#ifndef XSDE_CUSTOM_ALLOCATOR
        delete p_;
#else
        if (p_ != 0)
        {
          p_->~string_sequence ();
          cxx::free (p_);
        }
#endif
      }

      void
      release () { p_ = 0; }

    private:
      string_sequence* p_;
    };

    string_sequence* string_sequence::
    _clone () const
    {
#ifndef XSDE_CUSTOM_ALLOCATOR
      string_sequence* c = new string_sequence;
#else
      // Default string_sequence c-tor cannot throw so we don't need
      // alloc_guard.
      //
      string_sequence* c = static_cast<string_sequence*> (
        cxx::alloc (sizeof (string_sequence)));
      new (c) string_sequence;
#endif
      string_sequence_guard g (c);
      _copy (*c);
      g.release ();
      return c;
    }
#else
    string_sequence::error string_sequence::
    push_back_copy (const char* cs)
    {
      error r = error_none;

      if (capacity_ < size_ + 1)
        r = grow_ (0, sizeof (char*), 0);

      if (r == error_none)
      {
        char* s = strdupx (cs);

        if (s != 0)
          static_cast<char**> (data_)[size_++] = s;
        else
          r = error_no_memory;
      }

      return r;
    }

    sequence_base::error string_sequence::
    copy (string_sequence& c) const
    {
      if (c.size_ != 0)
        c.clear ();

      if (error r = c.reserve (size_))
        return r;

      for (; c.size_ < size_; ++c.size_)
      {
        char* x = strdupx (static_cast<char**> (data_)[c.size_]);

        if (x == 0)
          return error_no_memory;

        static_cast<char**> (c.data_)[c.size_] = x;
      }

      return error_none;
    }

    string_sequence* string_sequence::
    _clone () const
    {
#ifndef XSDE_CUSTOM_ALLOCATOR
      string_sequence* c = new string_sequence;
#else
      string_sequence* c = static_cast<string_sequence*> (
        cxx::alloc (sizeof (string_sequence)));
#endif

      if (c == 0)
        return 0;

#ifdef XSDE_CUSTOM_ALLOCATOR
      new (c) string_sequence;
#endif

      if (!_copy (*c))
      {
#ifndef XSDE_CUSTOM_ALLOCATOR
        delete c;
#else
        c->~string_sequence ();
        cxx::free (c);
#endif
        return 0;
      }

      return c;
    }
#endif

    bool
    operator== (const string_sequence& x, const string_sequence& y)
    {
      if (x.size () != y.size ())
        return false;

      for (size_t i = 0; i < x.size (); ++i)
        if (strcmp (x[i], y[i]) != 0)
          return false;

      return true;
    }
  }
}