- clean working copy for leaving SVN

juce/JUCE-3.1.1/extras/Introjucer/Source/Utility/jucer_FileHelpers.cpp

@@ -0,0 +1,215 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2013 - Raw Material Software Ltd.
+
+   Permission is granted to use this software under the terms of either:
+   a) the GPL v2 (or any later version)
+   b) the Affero GPL v3
+
+   Details of these licenses can be found at: www.gnu.org/licenses
+
+   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+   ------------------------------------------------------------------------------
+
+   To release a closed-source product which uses JUCE, commercial licenses are
+   available: visit www.juce.com for more information.
+
+  ==============================================================================
+*/
+
+#include "../jucer_Headers.h"
+#include "jucer_CodeHelpers.h"
+
+
+//==============================================================================
+namespace FileHelpers
+{
+    static int64 calculateMemoryHashCode (const void* data, const size_t numBytes)
+    {
+        int64 t = 0;
+
+        for (size_t i = 0; i < numBytes; ++i)
+            t = t * 65599 + static_cast <const uint8*> (data)[i];
+
+        return t;
+    }
+
+    int64 calculateStreamHashCode (InputStream& in)
+    {
+        int64 t = 0;
+
+        const int bufferSize = 4096;
+        HeapBlock <uint8> buffer;
+        buffer.malloc (bufferSize);
+
+        for (;;)
+        {
+            const int num = in.read (buffer, bufferSize);
+
+            if (num <= 0)
+                break;
+
+            for (int i = 0; i < num; ++i)
+                t = t * 65599 + buffer[i];
+        }
+
+        return t;
+    }
+
+    int64 calculateFileHashCode (const File& file)
+    {
+        ScopedPointer <FileInputStream> stream (file.createInputStream());
+        return stream != nullptr ? calculateStreamHashCode (*stream) : 0;
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const void* data, size_t numBytes)
+    {
+        if (file.getSize() == (int64) numBytes
+              && calculateMemoryHashCode (data, numBytes) == calculateFileHashCode (file))
+            return true;
+
+        if (file.exists())
+            return file.replaceWithData (data, numBytes);
+
+        return file.getParentDirectory().createDirectory() && file.appendData (data, numBytes);
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const MemoryOutputStream& newData)
+    {
+        return overwriteFileWithNewDataIfDifferent (file, newData.getData(), newData.getDataSize());
+    }
+
+    bool overwriteFileWithNewDataIfDifferent (const File& file, const String& newData)
+    {
+        const char* const utf8 = newData.toUTF8();
+        return overwriteFileWithNewDataIfDifferent (file, utf8, strlen (utf8));
+    }
+
+    bool containsAnyNonHiddenFiles (const File& folder)
+    {
+        DirectoryIterator di (folder, false);
+
+        while (di.next())
+            if (! di.getFile().isHidden())
+                return true;
+
+        return false;
+    }
+
+    String unixStylePath (const String& path)       { return path.replaceCharacter ('\\', '/'); }
+    String windowsStylePath (const String& path)    { return path.replaceCharacter ('/', '\\'); }
+
+    String currentOSStylePath (const String& path)
+    {
+       #if JUCE_WINDOWS
+        return windowsStylePath (path);
+       #else
+        return unixStylePath (path);
+       #endif
+    }
+
+    bool isAbsolutePath (const String& path)
+    {
+        return File::isAbsolutePath (path)
+                || path.startsWithChar ('/') // (needed because File::isAbsolutePath will ignore forward-slashes on Windows)
+                || path.startsWithChar ('$')
+                || path.startsWithChar ('~')
+                || (CharacterFunctions::isLetter (path[0]) && path[1] == ':')
+                || path.startsWithIgnoreCase ("smb:");
+    }
+
+    String appendPath (const String& path, const String& subpath)
+    {
+        if (isAbsolutePath (subpath))
+            return unixStylePath (subpath);
+
+        String path1 (unixStylePath (path));
+        if (! path1.endsWithChar ('/'))
+            path1 << '/';
+
+        return path1 + unixStylePath (subpath);
+    }
+
+    bool shouldPathsBeRelative (String path1, String path2)
+    {
+        path1 = unixStylePath (path1);
+        path2 = unixStylePath (path2);
+
+        const int len = jmin (path1.length(), path2.length());
+        int commonBitLength = 0;
+
+        for (int i = 0; i < len; ++i)
+        {
+            if (CharacterFunctions::toLowerCase (path1[i]) != CharacterFunctions::toLowerCase (path2[i]))
+                break;
+
+            ++commonBitLength;
+        }
+
+        return path1.substring (0, commonBitLength).removeCharacters ("/:").isNotEmpty();
+    }
+
+    String getRelativePathFrom (const File& file, const File& sourceFolder)
+    {
+       #if ! JUCE_WINDOWS
+        // On a non-windows machine, we can't know if a drive-letter path may be relative or not.
+        if (CharacterFunctions::isLetter (file.getFullPathName()[0]) && file.getFullPathName()[1] == ':')
+            return file.getFullPathName();
+       #endif
+
+        return file.getRelativePathFrom (sourceFolder);
+    }
+
+    // removes "/../" bits from the middle of the path
+    String simplifyPath (String::CharPointerType p)
+    {
+       #if JUCE_WINDOWS
+        if (CharacterFunctions::indexOf (p, CharPointer_ASCII ("/../")) >= 0
+             || CharacterFunctions::indexOf (p, CharPointer_ASCII ("\\..\\")) >= 0)
+       #else
+        if (CharacterFunctions::indexOf (p, CharPointer_ASCII ("/../")) >= 0)
+       #endif
+        {
+            StringArray toks;
+
+           #if JUCE_WINDOWS
+            toks.addTokens (p, "\\/", StringRef());
+           #else
+            toks.addTokens (p, "/", StringRef());
+           #endif
+
+            while (toks[0] == ".")
+                toks.remove (0);
+
+            for (int i = 1; i < toks.size(); ++i)
+            {
+                if (toks[i] == ".." && toks [i - 1] != "..")
+                {
+                    toks.removeRange (i - 1, 2);
+                    i = jmax (0, i - 2);
+                }
+            }
+
+            return toks.joinIntoString ("/");
+        }
+
+        return p;
+    }
+
+    String simplifyPath (const String& path)
+    {
+       #if JUCE_WINDOWS
+        if (path.contains ("\\..\\") || path.contains ("/../"))
+       #else
+        if (path.contains ("/../"))
+       #endif
+            return simplifyPath (path.getCharPointer());
+
+        return path;
+    }
+}