Changeset 295 for cpp/common/nonstd_stdio.cpp

Timestamp:

01/15/15 22:43:01 (9 years ago)

Author:

Maciej Komosinski

Message:

Reorganizations and extensions of directory/file/filesystem IO classes

File:

• cpp/common/nonstd_stdio.cpp (modified) (6 diffs)

cpp/common/nonstd_stdio.cpp

@@ -8 +8 @@
 #include <common/stl-util.h>
 
-#if defined _WIN32 && !defined SHP
-//<unistd.h> not needed for unlink()
+#ifdef _WIN32
 #include "Shlwapi.h" //PathIsRelative()
+#ifdef __BORLANDC__
+#pragma link "Shlwapi.lib" //PathIsRelative()
+#endif
 #include <sys/stat.h> //_stat
 #else
@@ -29 +31 @@
 }
 
-bool directoryExists(const char* path)
+#ifdef _WIN32
+bool isDirWritable(const char* path) //dir must not end with '\'
+{
+        wstring dir = Convert::utf8ToUtf16(path);
+        CreateDirectoryW(dir.c_str(), 0);
+        dir += L"\\test_file.write";
+        _wunlink(dir.c_str());
+        FILE *f = _wfopen(dir.c_str(), L"wt");
+        if (f)
+        {
+                fclose(f);
+                _wunlink(dir.c_str());
+                return true;
+        }
+        else
+                return false;
+}
+#endif
+
+bool directoryExists(const char* path, bool is_writable)
 {
         struct _stat s;
+        if (path[0] == 0) path = ".";
 #ifdef _WIN32
         if (_wstat(Convert::utf8ToUtf16(path).c_str(), &s) != 0) return false;
@@ -37 +59 @@
         if (_stat(path, &s) != 0) return false;
 #endif
-        return S_ISDIR(s.st_mode);
+        if (S_ISDIR(s.st_mode))
+        {
+                if (is_writable)
+                {
+#ifdef _WIN32
+#ifndef W_OK
+#define W_OK 2 //http://msdn.microsoft.com/en-us/library/1w06ktdy.aspx
+#endif
+                        //under Windows, access() is not a reliable way to check if a directory is writable
+                        //http://stackoverflow.com/questions/198071/code-for-checking-write-permissions-for-directories-in-win2k-xp
+                        //bool writable_access = _waccess(Convert::utf8ToUtf16(path).c_str(), W_OK) == 0;
+                        bool writable_trial = isDirWritable(path);
+                        //printf("Checking '%s' for writing(%d) using access(): result=%d\n", path, is_writable, writable_access);
+                        //printf("File creation test: result=%d\n", writable_trial);
+                        //return writable_access;
+                        return writable_trial;
+#else
+                        return access(path, W_OK) == 0;
+#endif
+                }
+                else
+                        return true;
+        }
+        return false;
 }
 
@@ -51 +96 @@
 bool makeDirectories(const char* path)
 {
-        if (directoryExists(path)) return true;
+        if (directoryExists(path,false)) return true;
         string parentdir = getFileDir(path);
         if (!makeDirectories(parentdir.c_str())) return false;
@@ -92 +137 @@
 {
         if (fname == NULL) return false; //SplitFileSystem never passes NULL but this function is public so we never know
-#if defined _WIN32
+#ifdef _WIN32
         return PathIsRelativeW(Convert::utf8ToUtf16(fname).c_str()) == FALSE; //http://msdn.microsoft.com/en-us/library/bb773660%28v=vs.85%29.aspx
 #else
@@ -201 +246 @@
 MFILE *mfopen(const char *path, const char *mode)
 {
-        string respath=GET_APP_RESOURCES; //the macro can be char* or std::string, we don't know (nonstd.h, INITIAL_DIR_IS_RES, cwd.cpp) so we convert it to std::string
+        string respath=getAppResources();
         //printFM("Opening '%s', mode='%s'",path,mode);
-        //printFM("GET_APP_RESOURCES='%s'",respath.c_str());
+        //printFM("getAppResources()='%s'",respath.c_str());
         NvFile *rfile=NULL; //can only read
         FILE *rwfile=NULL;