src/io/filesystem.cpp

   1 #include "filesystem.hpp"
   2
   3 #include <cerrno>
   4 #ifdef _WIN32
   5 #  include <direct.h>
   6 #endif
   7 #include <sys/stat.h>
   8
   9
  10 namespace blank {
  11
  12 bool is_dir(const char *path) {
  13 #ifdef _WIN32
  14         struct _stat info;
  15         if (_stat(path, &info) != 0) {
  16                 return false;
  17         }
  18         return (info.st_mode & _S_IFDIR) != 0;
  19 #else
  20         struct stat info;
  21         if (stat(path, &info) != 0) {
  22                 return false;
  23         }
  24         return S_ISDIR(info.st_mode);
  25 #endif
  26 }
  27
  28 bool is_file(const char *path) {
  29 #ifdef _WIN32
  30         struct _stat info;
  31         if (_stat(path, &info) != 0) {
  32                 return false;
  33         }
  34         return (info.st_mode & _S_IFREG) != 0;
  35 #else
  36         struct stat info;
  37         if (stat(path, &info) != 0) {
  38                 return false;
  39         }
  40         return S_ISREG(info.st_mode);
  41 #endif
  42 }
  43
  44
  45 bool make_dir(const char *path) {
  46 #ifdef _WIN32
  47         int ret = _mkdir(path);
  48 #else
  49         int ret = mkdir(path, 0777);
  50 #endif
  51         return ret == 0;
  52 }
  53
  54
  55 bool make_dirs(const std::string &path) {
  56         if (make_dir(path)) {
  57                 return true;
  58         }
  59
  60         switch (errno) {
  61
  62                 case ENOENT:
  63                         // missing component
  64                         {
  65 #ifdef _WIN32
  66                                 auto pos = path.find_last_of("\\/");
  67 #else
  68                                 auto pos = path.find_last_of('/');
  69 #endif
  70                                 if (pos == std::string::npos) {
  71                                         return false;
  72                                 }
  73                                 if (pos == path.length() - 1) {
  74                                         // trailing separator, would make final make_dir fail
  75 #ifdef _WIN32
  76                                          pos = path.find_last_of("\\/", pos - 1);
  77 #else
  78                                          pos = path.find_last_of('/', pos - 1);
  79 #endif
  80                                         if (pos == std::string::npos) {
  81                                                 return false;
  82                                         }
  83                                 }
  84                                 if (!make_dirs(path.substr(0, pos))) {
  85                                         return false;
  86                                 }
  87                         }
  88                         // try again
  89                         return make_dir(path);
  90
  91                 case EEXIST:
  92                         // something's there, check if it's a dir and we're good
  93                         return is_dir(path);
  94
  95                 default:
  96                         // whatever else went wrong, it can't be good
  97                         return false;
  98
  99         }
 100 }
 101
 102 }