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/***************************************************************
io.c

author : uema2
date : Nov 30, 2002

You can freely use, copy, modify, and redistribute
the whole contents.
***************************************************************/

#include <windows.h>
#include <stdlib.h>
#include <io.h>
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include "wince.h" /* for wce_mbtowc */

extern int _errno;


int _rename(const char *oldname, const char *newname)
{
wchar_t *wold, *wnew;
BOOL rc;

wold = wce_mbtowc(oldname);
wnew = wce_mbtowc(newname);

/* replace with MoveFile. */
rc = MoveFileW(wold, wnew);

free(wold);
free(wnew);

return rc==TRUE ? 0 : -1;
}

int _unlink(const char *file)
{
wchar_t *wfile;
BOOL rc;

/* replace with DeleteFile. */
wfile = wce_mbtowc(file);
rc = DeleteFileW(wfile);
free(wfile);

return rc==TRUE ? 0 : -1;
}

/* replace "open" with "CreateFile", etc. */
int _open(const char *file, int mode, va_list arg)
{
wchar_t *wfile;
DWORD access=0, share=0, create=0;
HANDLE h;

if( (mode&_O_RDWR) != 0 )
access = GENERIC_READ|GENERIC_WRITE;
else if( (mode&_O_RDONLY) != 0 )
access = GENERIC_READ;
else if( (mode&_O_WRONLY) != 0 )
access = GENERIC_WRITE;

if( (mode&_O_CREAT) != 0 )
create = CREATE_ALWAYS;
else
create = OPEN_ALWAYS;

wfile = wce_mbtowc(file);

h = CreateFileW(wfile, access, share, NULL,
create, 0, NULL );

free(wfile);
return (int)h;
}

int close(int fd)
{
CloseHandle( (HANDLE)fd );
return 0;
}

int _read(int fd, void *buffer, int length)
{
DWORD dw;
ReadFile( (HANDLE)fd, buffer, length, &dw, NULL );
return (int)dw;
}

int _write(int fd, const void *buffer, unsigned count)
{
DWORD dw;
WriteFile( (HANDLE)fd, buffer, count, &dw, NULL );
return (int)dw;
}

long _lseek(int handle, long offset, int origin)
{
DWORD flag, ret;

switch(origin)
{
case SEEK_SET: flag = FILE_BEGIN; break;
case SEEK_CUR: flag = FILE_CURRENT; break;
case SEEK_END: flag = FILE_END; break;
default: flag = FILE_CURRENT; break;
}

ret = SetFilePointer( (HANDLE)handle, offset, NULL, flag );
return ret==0xFFFFFFFF ? -1 : 0;
}

/* _findfirst, _findnext, _findclose. */
/* replace them with FindFirstFile, etc. */
long _findfirst( char *file, struct _finddata_t *fi )
{
HANDLE h;
WIN32_FIND_DATAA fda;

h = FindFirstFileA( file, &fda );
if( h==NULL )
{
errno = EINVAL; return -1;
}

fi->attrib = fda.dwFileAttributes;
fi->time_create = wce_FILETIME2time_t( &fda.ftCreationTime );
fi->time_access = wce_FILETIME2time_t( &fda.ftLastAccessTime );
fi->time_write = wce_FILETIME2time_t( &fda.ftLastWriteTime );
fi->size = fda.nFileSizeLow + (fda.nFileSizeHigh<<32);
strcpy( fi->name, fda.cFileName );

return (long)h;
}

int _findnext( long handle, struct _finddata_t *fi )
{
WIN32_FIND_DATAA fda;
BOOL b;

b = FindNextFileA( (HANDLE)handle, &fda );

if( b==FALSE )
{
errno = ENOENT; return -1;
}

fi->attrib = fda.dwFileAttributes;
fi->time_create = wce_FILETIME2time_t( &fda.ftCreationTime );
fi->time_access = wce_FILETIME2time_t( &fda.ftLastAccessTime );
fi->time_write = wce_FILETIME2time_t( &fda.ftLastWriteTime );
fi->size = fda.nFileSizeLow + (fda.nFileSizeHigh<<32);
strcpy( fi->name, fda.cFileName );

return 0;
}

int _findclose( long handle )
{
BOOL b;
b = FindClose( (HANDLE)handle );
return b==FALSE ? -1 : 0;
}

/* below functions unsupported... */
/* I have no idea how to replace... */
int _chsize(int handle, long size)
{
errno = EACCES;
return -1;
}

int _umask(int cmask)
{
return 0;
}

int _chmod(const char *path, int mode)
{
return 0;
}

/* WinCE doesn't have dup and dup2. */
/* so, we cannot use missing/dup2.c. */
int dup( int handle )
{
errno = EBADF;
return -1;
}
/*
int dup2( int handle1, int handle2 )
{
errno = EBADF;
return -1;
}
*/
int _isatty(int fd)
{
if( fd==(int)_fileno(stdin) ||
fd==(int)_fileno(stdout)||
fd==(int)_fileno(stderr) )
return 1;
else
return 0;
}

int _pipe(int *phandles, unsigned int psize, int textmode)
{
return -1;
}

int _access(const char *filename, int flags)
{
return 0;
}

int _open_osfhandle( long osfhandle, int flags)
{
/* return 0; */
return (int)osfhandle;
}

long _get_osfhandle( int filehandle )
{
/* return 0; */
return (long)filehandle;
}
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