src/tools/fs_shell/path_util.cpp

   1 /*
   2  * Copyright 2005-2007, Ingo Weinhold, bonefish@cs.tu-berlin.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include "path_util.h"
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11 #include "fssh_errors.h"
  12
  13
  14 namespace FSShell {
  15
  16
  17 fssh_status_t
  18 get_last_path_component(const char *path, char *buffer, int bufferLen)
  19 {
  20         int len = strlen(path);
  21         if (len == 0)
  22                 return FSSH_B_BAD_VALUE;
  23
  24         // eat trailing '/'
  25         while (len > 0 && path[len - 1] == '/')
  26                 len--;
  27
  28         if (len == 0) {
  29                 // path is `/'
  30                 len = 1;
  31         } else {
  32                 // find previous '/'
  33                 int pos = len - 1;
  34                 while (pos > 0 && path[pos] != '/')
  35                         pos--;
  36                 if (path[pos] == '/')
  37                         pos++;
  38
  39                 path += pos;
  40                 len -= pos;
  41         }
  42
  43         if (len >= bufferLen)
  44                 return FSSH_B_NAME_TOO_LONG;
  45
  46         memcpy(buffer, path, len);
  47         buffer[len] = '\0';
  48         return FSSH_B_OK;
  49 }
  50
  51 char *
  52 make_path(const char *dir, const char *entry)
  53 {
  54         // get the len
  55         int dirLen = strlen(dir);
  56         int entryLen = strlen(entry);
  57         bool insertSeparator = (dir[dirLen - 1] != '/');
  58         int pathLen = dirLen + entryLen + (insertSeparator ? 1 : 0) + 1;
  59
  60         // allocate the path
  61         char *path = (char*)malloc(pathLen);
  62         if (!path)
  63                 return NULL;
  64
  65         // compose the path
  66         strcpy(path, dir);
  67         if (insertSeparator)
  68                 strcat(path + dirLen, "/");
  69         strcat(path + dirLen, entry);
  70
  71         return path;
  72 }
  73
  74
  75 }       // namespace FSShell