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/*

    This file is part of a common library

    Copyright (C) 2002-6 Toby Thain, toby@telegraphics.com.au

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program 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.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <windows.h>

#include <stdio.h>

#include "file_compat.h"

#include "str.h"

OSErr FSClose(FILEREF f){

//      dbg("FSClose");

        return CloseHandle(f) ? noErr : ioErr;

}

OSErr FSWrite(FILEREF refNum, long *count, const void *buffPtr){

        DWORD n;

        BOOL f;

        f = WriteFile(refNum,buffPtr,*count,&n,0);

//      sprintf(s,"FSWrite(%d,%#x):%d",*count,buffPtr,n); dbg(s);

        *count = n;

        return f ? noErr : ioErr;

}

OSErr FSRead(FILEREF refNum, long *count, void *buffPtr){

        DWORD n;

        BOOL f;

        f = ReadFile(refNum,buffPtr,*count,&n,0);

//      sprintf(s,"FSRead(%d,%#x):%d",*count,buffPtr,n); dbg(s);

        *count = n;

        return f ? (n ? noErr : eofErr) : ioErr;

}

OSErr FSpOpenDF(const FSSpec *spec, int permission, FILEREF *refNum){

        static DWORD perm[] = {

                /* 0: fsCurPerm  */ GENERIC_READ | GENERIC_WRITE,

                /* 1: fsRdPerm   */ GENERIC_READ,

                /* 2: fsWrPerm   */ GENERIC_WRITE,

                /* 3: fsRdWrPerm */ GENERIC_READ | GENERIC_WRITE

        };

        *refNum = CreateFile(spec->szName,perm[permission],0,0,OPEN_EXISTING,0,0);

//      sprintf(s,"FSpOpenDF(\"%s\",\"%s\"):%#x",spec->name,perm[permission],*refNum); dbg(s);

        return *refNum == INVALID_HANDLE_VALUE ? ioErr : noErr;

}

OSErr FSpCreate(const FSSpec *spec, OSType creator, OSType fileType, ScriptCode scriptTag){

        HANDLE h;

        UNREFERENCED_PARAMETER(creator);

        UNREFERENCED_PARAMETER(scriptTag);

        UNREFERENCED_PARAMETER(fileType);

        h = CreateFile(spec->szName,0,0,0,CREATE_NEW,0,0);

//      sprintf(s,"FSpCreate(\"%s\"):%#x",spec->name,h); dbg(s);

        if( h == INVALID_HANDLE_VALUE )

                return ioErr;

        else{

                CloseHandle(h);

                return noErr;

        }

}

OSErr FSpDelete(const FSSpec *spec){

        BOOL f;

        f = DeleteFile(spec->szName);

        return f ? noErr : ioErr;

}

OSErr GetFPos(FILEREF   refNum,FILEPOS *  filePos){

        *filePos = SetFilePointer(refNum,0,0,FILE_CURRENT);

//      sprintf(s,"GetFPos(%#x):%#x",refNum,*filePos); dbg(s);

        return *filePos == INVALID_SET_FILE_POINTER ? ioErr : noErr;

}

OSErr SetFPos(FILEREF   refNum,short   posMode,long    posOff){

        static DWORD method[]={0,FILE_BEGIN,FILE_END,FILE_CURRENT};

        DWORD res = SetFilePointer(refNum,posOff,0,method[posMode]);

//      sprintf(s,"SetFPos(%#x,%d,%d):%#x",refNum,posMode,posOff,res); dbg(s);

        return res == INVALID_SET_FILE_POINTER ? ioErr : noErr;

}

OSErr GetEOF(FILEREF   refNum,FILEPOS *  logEOF){

        DWORD n = GetFileSize(refNum,NULL);

//      {char s[100];sprintf(s,"GetEOF(%#x):%d",refNum,n); dbg(s);}

        *logEOF = n;

        return n == INVALID_FILE_SIZE ? ioErr : noErr;

}

OSErr SetEOF(FILEREF   refNum,FILEPOS logEOF){

        return SetFilePointer(refNum,logEOF,0,FILE_BEGIN) == INVALID_SET_FILE_POINTER

                || !SetEndOfFile(refNum) ? ioErr : noErr;

}

#if 0 // this code is not really cooked

/* Resources */

struct rchain_node{

        struct rchain_node *next;

        HMODULE hmodule;

} *resource_chain = 0;

HMODULE FSpOpenResFile(const FSSpec *  spec,SignedByte      permission){

        struct rchain_node *p;

        HMODULE hm;

        char name[MAX_PATH+1];

        if( hm = LoadLibrary(myp2cstrcpy(name,spec->name)) ){

                p = (struct rchain_node*)malloc(sizeof(struct rchain_node)));

                p->hmodule = hm;

                p->next = resource_chain;

                resource_chain = p;

                return hm;

        }

        myc2pstr(spec->name);

        return 0;

}

void CloseResFile(HMODULE hm){

        struct rchain_node *p;

        for( p = resource_chain ; p ; p = p->next )

                if(p->hmodule == hm){

                        FreeLibrary(p->hmodule);

                        p->hmodule = 0;

                        break;

                }

        /* p now points to the node we want to delete, or NULL if none found */

        if(p == resource_chain){

                resource_chain = resource_chain->next;

                free(p);

        }

}

HGLOBAL GetResource(ResType   theType,short     theID){

        HRSRC h;

        char t[5];

        if(resource_chain && resource_chain->hmodule){

                t[0] = theType>>24;

                t[1] = theType>>16;

                t[2] = theType>>8;

                t[3] = theType;

                t[4] = 0;

                if(h = FindResource(resource_chain->hmodule,theID,t))

                        return LoadResource(resource_chain->hmodule,h);

        }

        return 0;

}

#endif