File: wfixpath.c

package info (click to toggle)
wcd 3.2.0-1
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k, lenny
  • size: 804 kB
  • ctags: 640
  • sloc: ansic: 8,260; makefile: 43; sh: 6; csh: 1
file content (181 lines) | stat: -rw-r--r-- 3,495 bytes parent folder | download
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
/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */

/* Modified by Erwin Waterlander. Mar 30 1999 */
/* Oct 16 2001: On Unix directories can have a backslash (\)
 *              in the name, so they must not be replaced a slash (/)
 *              Erwin Waterlander
 * Oct 26 2002: Keep first two slashes if WIN32 (UNC path)
 *              Erwin Waterlander
 * Sep 8 2005:  Keep first two slashes also for Cygwin (UNC path)
 *              Erwin Waterlander
 */

#include <stdio.h>		/* For FILENAME_MAX */
#include <stdlib.h>
#include <string.h>
#include "tailor.h"

int wcd_is_slash(int c)
{
#if (defined(UNIX) && !defined(__CYGWIN__))  /* Oct 16 2001 */
  return c == '/';
#else
  return c == '/' || c == '\\';
#endif
}

static int is_term(int c)
{
#if (defined(UNIX) && !defined(__CYGWIN__))  /* Oct 16 2001 */
  return c == '/' || c == '\0';
#else
  return c == '/' || c == '\\' || c == '\0';
#endif
}

/* Takes as input an arbitrary path.  Fixes up the path by:
   1. Removing consecutive slashes
   2. Removing trailing slashes
   4. Removing "." in the path
   7. Converting all slashes to '/'

   8. Keep beginning "/"
   9. Keep beginning "./"
  10. Don't fix path "."
*/

void wcd_fixpath(char *in, int lim)
{
  int	i=0,drive_number= -1;
  const char	*ip = in;
  char  *out;
  char	*op;

  if (in == NULL)
   	return ;

  if ((out = (char *) malloc(lim)) == NULL)
  {
  	fprintf(stderr,"Wcd: malloc error in wcd_fixpath()\n");
	return;
  }

  op = out;

#ifdef MSDOS
  /* Add drive specification to output string (if present) */
  if (((*ip >= 'a' && *ip <= 'z') ||
       (*ip >= 'A' && *ip <= 'Z'))
      && (*(ip + 1) == ':'))
  {
    if (*ip >= 'a' && *ip <= 'z')
    {
      drive_number = *ip - 'a';
      *op++ = *ip++;
    }
    else
    {
      drive_number = *ip - 'A';
      if (*ip <= 'Z')
	*op++ = drive_number + 'a';
      else
	*op++ = *ip;
      ++ip;
    }
    *op++ = *ip++;
	i+=2;
  }
#endif

#if (defined(WIN32) || defined(__CYGWIN__))
   /* Keep first "//" if present (UNC path) */
	 if (wcd_is_slash(*ip) && wcd_is_slash(*(ip + 1)))
	 {
	   ip+=2 ;
	   *op++ = '/';
	   *op++ = '/';
	   i+=2 ;
	 }
	 else
#endif
    /* Keep first slash if present */
    if (wcd_is_slash(*ip))
    {
      ip++;
	  *op++ = '/';
	  i++ ;
    }
	else  /* return if ip == "." */
	if ((*ip == '.') && (*(ip + 1) == '\0'))
	  {
		free(out);
	    return ;
	  }
	else  /* Keep first "./" if present */
	if (*ip == '.' && wcd_is_slash(*(ip + 1)))
	{
	  ip+=2 ;
	  *op++ = '.';
	  *op++ = '/';
	  i+=2 ;
	}


  /* Step through the input path */
  while ((*ip) && (i<(lim-1)))
  {
    /* Skip input slashes */
    if (wcd_is_slash(*ip))
    {
      ip++;
      continue;
    }

    /* Skip "." and output nothing */
    if (*ip == '.' && is_term(*(ip + 1)))
    {
      ip++;
      continue;
    }

    /* Copy path component from in to out */
	if ((op > out) && (*(op-1) != '/'))
	{
		*op++ = '/';
		i++ ;
	}
    while (!is_term(*ip))
	{
		*op++ = *ip++;
		i++;
	}
  }

  /* If root directory, insert trailing slash */
  if (((drive_number >= 0) && (op == out + 2)) || (op == out)) *op++ = '/';

  /* Null terminate the output */
  *op = '\0';

  strcpy(in,out);

  free(out);

}

#ifdef TEST

int main (int argc, char *argv[])
{
  char fixed[FILENAME_MAX];
  if (argc > 1)
    {
	  strcpy(fixed,argv[1]);
	  wcd_fixpath (fixed,FILENAME_MAX);
      printf ("You mean %s?\n", fixed);
    }
  return 0;
}

#endif