~drizzle-trunk/drizzle/development

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
/* Copyright (C) 2000 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "mysys_priv.h"
#include <mystrings/m_string.h>

	/* Functions definied in this file */

size_t dirname_length(const char *name)
{
  register const char *pos, *gpos;
#ifdef BASKSLASH_MBTAIL
  CHARSET_INFO *fs= fs_character_set();
#endif
#ifdef FN_DEVCHAR
  if ((pos=(char*)strrchr(name,FN_DEVCHAR)) == 0)
#endif
    pos=name-1;

  gpos= pos++;
  for ( ; *pos ; pos++)				/* Find last FN_LIBCHAR */
  {
#ifdef BASKSLASH_MBTAIL
    uint32_t l;
    if (use_mb(fs) && (l= my_ismbchar(fs, pos, pos + 3)))
    {
      pos+= l - 1;
      continue;
    }
#endif
    if (*pos == FN_LIBCHAR || *pos == '/'
#ifdef FN_C_AFTER_DIR
	|| *pos == FN_C_AFTER_DIR || *pos == FN_C_AFTER_DIR_2
#endif
	)
      gpos=pos;
  }
  return gpos-name+1;
}


/*
  Gives directory part of filename. Directory ends with '/'

  SYNOPSIS
    dirname_part()
    to		Store directory name here
    name	Original name
    to_length	Store length of 'to' here

  RETURN
   #  Length of directory part in 'name'
*/

size_t dirname_part(char *to, const char *name, size_t *to_res_length)
{
  size_t length;

  length=dirname_length(name);
  *to_res_length= (size_t) (convert_dirname(to, name, name+length) - to);
  return(length);
} /* dirname */


/*
  Convert directory name to use under this system

  SYNPOSIS
    convert_dirname()
    to				Store result here. Must be at least of size
    				cmin(FN_REFLEN, strlen(from) + 1) to make room
    				for adding FN_LIBCHAR at the end.
    from			Original filename. May be == to
    from_end			Pointer at end of filename (normally end \0)

  IMPLEMENTATION
    If MSDOS converts '/' to '\'
    If VMS converts '<' to '[' and '>' to ']'
    Adds a FN_LIBCHAR to end if the result string if there isn't one
    and the last isn't dev_char.
    Copies data from 'from' until ASCII(0) for until from == from_end
    If you want to use the whole 'from' string, just send NULL as the
    last argument.

    If the result string is larger than FN_REFLEN -1, then it's cut.

  RETURN
   Returns pointer to end \0 in to
*/

#ifndef FN_DEVCHAR
#define FN_DEVCHAR '\0'				/* For easier code */
#endif

char *convert_dirname(char *to, const char *from, const char *from_end)
{
  char *to_org=to;
#ifdef BACKSLASH_MBTAIL
  CHARSET_INFO *fs= fs_character_set();
#endif

  /* We use -2 here, becasue we need place for the last FN_LIBCHAR */
  if (!from_end || (from_end - from) > FN_REFLEN-2)
    from_end=from+FN_REFLEN -2;

#if FN_LIBCHAR != '/' || defined(FN_C_BEFORE_DIR_2)
  {
    for (; from != from_end && *from ; from++)
    {
      if (*from == '/')
	*to++= FN_LIBCHAR;
#ifdef FN_C_BEFORE_DIR_2
      else if (*from == FN_C_BEFORE_DIR_2)
	*to++= FN_C_BEFORE_DIR;
      else if (*from == FN_C_AFTER_DIR_2)
	*to++= FN_C_AFTER_DIR;
#endif
      else
      {
#ifdef BACKSLASH_MBTAIL
        uint32_t l;
        if (use_mb(fs) && (l= my_ismbchar(fs, from, from + 3)))
        {
          memmove(to, from, l);
          to+= l;
          from+= l - 1;
          to_org= to; /* Don't look inside mbchar */
        }
        else
#endif
        {
          *to++= *from;
        }
      }
    }
    *to=0;
  }
#else
  /* This is ok even if to == from, becasue we need to cut the string */
  size_t len= cmin(strlen(from),(size_t)(from_end-from));
  assert(memmove(to, from, len));
  to+= len;
  to[0]= '\0';
#endif

  /* Add FN_LIBCHAR to the end of directory path */
  if (to != to_org && (to[-1] != FN_LIBCHAR && to[-1] != FN_DEVCHAR))
  {
    *to++=FN_LIBCHAR;
    *to=0;
  }
  return(to);                              /* Pointer to end of dir */
} /* convert_dirname */