dirUtils.c 1.19 KB
Newer Older
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
/* 
 * (c) The University of Glasgow 2002
 *
 * Directory Runtime Support
 */

#include "HsUnix.h"

/*
 * read an entry from the directory stream; opt for the
 * re-entrant friendly way of doing this, if available.
 */
int
__hscore_readdir( DIR *dirPtr, struct dirent **pDirEnt )
{
#if HAVE_READDIR_R
  struct dirent* p;
  int res;
  static unsigned int nm_max = (unsigned int)-1;
  
  if (pDirEnt == NULL) {
    return -1;
  }
  if (nm_max == (unsigned int)-1) {
#ifdef NAME_MAX
    nm_max = NAME_MAX + 1;
#else
    nm_max = pathconf(".", _PC_NAME_MAX);
    if (nm_max == -1) { nm_max = 255; }
    nm_max++;
#endif
  }
  p = (struct dirent*)malloc(sizeof(struct dirent) + nm_max);
  if (p == NULL) return -1;
  res = readdir_r(dirPtr, p, pDirEnt);
  if (res != 0) {
      *pDirEnt = NULL;
      free(p);
  }
  else if (*pDirEnt == NULL) {
    // end of stream
    free(p);
  }
  return res;
#else

  if (pDirEnt == NULL) {
    return -1;
  }

  *pDirEnt = readdir(dirPtr);
  if (*pDirEnt == NULL) {
    return -1;
  } else {
    return 0;
  }  
#endif
}

char *
__hscore_d_name( struct dirent* d )
{
  return (d->d_name);
}

void
__hscore_free_dirent(struct dirent *dEnt)
{
#if HAVE_READDIR_R
  free(dEnt);
#endif
}