db2/os/db_os_abs.c

   1 /*-
   2  * See the file LICENSE for redistribution information.
   3  *
   4  * Copyright (c) 1997
   5  *      Sleepycat Software.  All rights reserved.
   6  */
   7
   8 #include "config.h"
   9
  10 #ifndef lint
  11 static const char sccsid[] = "@(#)db_os_abs.c   10.5 (Sleepycat) 7/5/97";
  12 #endif /* not lint */
  13
  14 #ifndef NO_SYSTEM_INCLUDES
  15 #include <string.h>
  16 #endif
  17
  18 #include "db_int.h"
  19 #include "os_ext.h"
  20
  21 /*
  22  * __db_abspath --
  23  *      Return if a path is an absolute path.
  24  *
  25  * PUBLIC: int __db_abspath __P((const char *));
  26  */
  27 int
  28 __db_abspath(path)
  29         const char *path;
  30 {
  31 #ifdef _WIN32
  32         /*
  33          * !!!
  34          * Check for drive specifications, e.g., "C:".  In addition, the path
  35          * separator used by the win32 DB (PATH_SEPARATOR) is \; look for both
  36          * / and \ since these are user-input paths.
  37          */
  38         if (isalpha(path[0]) && path[1] == ':')
  39                 path += 2;
  40         return (path[0] == '/' || path[0] == '\\');
  41 #else
  42 #ifdef macintosh
  43         /*
  44          * !!!
  45          * Absolute pathnames always start with a volume name, which must be
  46          * followed by a colon, thus they are of the form:
  47          *      volume: or volume:dir1:dir2:file
  48          *
  49          * Relative pathnames are either a single name without colons or a
  50          * path starting with a colon, thus of the form:
  51          *      file or :file or :dir1:dir2:file
  52          */
  53         return (strchr(path, ':') != NULL && path[0] != ':');
  54 #else
  55         return (path[0] == '/');
  56 #endif
  57 #endif
  58 }
  59
  60 /*
  61  * __db_rpath --
  62  *      Return the last path separator in the path or NULL if none found.
  63  *
  64  * PUBLIC: char *__db_rpath __P((const char *));
  65  */
  66 char *
  67 __db_rpath(path)
  68         const char *path;
  69 {
  70         const char *s, *last;
  71
  72         last = NULL;
  73         if (PATH_SEPARATOR[1] != '\0') {
  74                 for (s = path; s[0] != '\0'; ++s)
  75                         if (strchr(PATH_SEPARATOR, s[0]) != NULL)
  76                                 last = s;
  77         } else
  78                 for (s = path; s[0] != '\0'; ++s)
  79                         if (s[0] == PATH_SEPARATOR[0])
  80                                 last = s;
  81         return ((char *)last);
  82 }