coreutil.h

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __IRR_CORE_UTIL_H_INCLUDED__
#define __IRR_CORE_UTIL_H_INCLUDED__

#include "irrString.h"
#include "path.h"

namespace irr
{
namespace core
{

// ----------- some basic quite often used string functions -----------------

inline s32 isFileExtension (const io::path& filename, const io::path& ext0,
                                const io::path& ext1, const io::path& ext2)
{
        s32 extPos = filename.findLast ( '.' );
        if ( extPos < 0 )
                return 0;

        extPos += 1;
        if ( filename.equals_substring_ignore_case ( ext0, extPos ) )
                return 1;
        if ( filename.equals_substring_ignore_case ( ext1, extPos ) )
                return 2;
        if ( filename.equals_substring_ignore_case ( ext2, extPos ) )
                return 3;
        return 0;
}

inline bool hasFileExtension(const io::path& filename, const io::path& ext0,
                                const io::path& ext1 = "", const io::path& ext2 = "")
{
        return isFileExtension ( filename, ext0, ext1, ext2 ) > 0;
}

inline io::path& cutFilenameExtension ( io::path &dest, const io::path &source )
{
        s32 endPos = source.findLast ( '.' );
        dest = source.subString ( 0, endPos < 0 ? source.size () : endPos );
        return dest;
}

inline io::path& getFileNameExtension ( io::path &dest, const io::path &source )
{
        s32 endPos = source.findLast ( '.' );
        if ( endPos < 0 )
                dest = "";
        else
                dest = source.subString ( endPos, source.size () );
        return dest;
}

inline io::path& deletePathFromFilename(io::path& filename)
{
        // delete path from filename
        const fschar_t* s = filename.c_str();
        const fschar_t* p = s + filename.size();

        // search for path separator or beginning
        while ( *p != '/' && *p != '\\' && p != s )
                p--;

        if ( p != s )
        {
                ++p;
                filename = p;
        }
        return filename;
}

inline io::path& deletePathFromPath(io::path& filename, s32 pathCount)
{
        // delete path from filename
        s32 i = filename.size();

        // search for path separator or beginning
        while ( i>=0 )
        {
                if ( filename[i] == '/' || filename[i] == '\\' )
                {
                        if ( --pathCount <= 0 )
                                break;
                }
                --i;
        }

        if ( i>0 )
        {
                filename [ i + 1 ] = 0;
                filename.validate();
        }
        else
                filename="";
        return filename;
}

inline s32 isInSameDirectory ( const io::path& path, const io::path& file )
{
        if ( path.size() && !path.equalsn ( file, path.size() ) )
                return -1;

        s32 subA = 0;
        s32 subB = 0;
        s32 pos = 0;
        while ( (pos = path.findNext ( '/', pos )) >= 0 )
        {
                subA += 1;
                pos += 1;
        }

        pos = 0;
        while ( (pos = file.findNext ( '/', pos )) >= 0 )
        {
                subB += 1;
                pos += 1;
        }

        return subB - subA;
}

static inline void splitFilename(const io::path &name, io::path* path=0,
                io::path* filename=0, io::path* extension=0, bool make_lower=false)
{
        s32 i = name.size();
        s32 extpos = i;

        // search for path separator or beginning
        while ( i >= 0 )
        {
                if ( name[i] == '.' )
                {
                        extpos = i;
                        if ( extension )
                                *extension = name.subString ( extpos + 1, name.size() - (extpos + 1), make_lower );
                }
                else
                if ( name[i] == '/' || name[i] == '\\' )
                {
                        if ( filename )
                                *filename = name.subString ( i + 1, extpos - (i + 1), make_lower );
                        if ( path )
                        {
                                *path = name.subString ( 0, i + 1, make_lower );
                                path->replace ( '\\', '/' );
                        }
                        return;
                }
                i -= 1;
        }
        if ( filename )
                *filename = name.subString ( 0, extpos, make_lower );
}

static inline io::path mergeFilename(const io::path& path, const io::path& filename, const io::path& extension = "")
{
        io::path result(path);

        if ( !result.empty() )
        {
                fschar_t last = result.lastChar();
                if ( last != _IRR_TEXT('/') && last != _IRR_TEXT('\\') )
                        result += _IRR_TEXT('/');
        }
        if ( !filename.empty() )
                result += filename;
        if ( !extension.empty() )
        {
                if ( !result.empty() && extension[0] != _IRR_TEXT('.') )
                        result += _IRR_TEXT('.');
                result += extension;
        }

        return result;
}


inline s32 isdigit(s32 c) { return c >= '0' && c <= '9'; }
inline s32 isspace(s32 c) { return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v'; }
inline s32 isupper(s32 c) { return c >= 'A' && c <= 'Z'; }


} // end namespace core
} // end namespace irr

#endif