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/*
* Id: file.c,v 1.2 1999/11/02 06:16:47 keithp Exp $
*
* Copyright 1999 SuSE, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of SuSE not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. SuSE makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Keith Packard, SuSE, Inc.
*/
/* $XFree86: xc/lib/font/builtins/file.c,v 1.3 1999/12/30 02:29:49 robin Exp $ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "builtin.h"
typedef struct _BuiltinIO {
int offset;
BuiltinFilePtr file;
} BuiltinIORec, *BuiltinIOPtr;
static int
BuiltinFill (BufFilePtr f)
{
int left, len;
BuiltinIOPtr io = ((BuiltinIOPtr) f->private);
left = io->file->len - io->offset;
if (left <= 0)
{
f->left = 0;
return BUFFILEEOF;
}
len = BUFFILESIZE;
if (len > left)
len = left;
memcpy (f->buffer, io->file->bits + io->offset, len);
io->offset += len;
f->left = len - 1;
f->bufp = f->buffer + 1;
return f->buffer[0];
}
static int
BuiltinSkip (BufFilePtr f, int count)
{
BuiltinIOPtr io = ((BuiltinIOPtr) f->private);
int curoff;
int fileoff;
int todo;
curoff = f->bufp - f->buffer;
fileoff = curoff + f->left;
if (curoff + count <= fileoff) {
f->bufp += count;
f->left -= count;
} else {
todo = count - (fileoff - curoff);
io->offset += todo;
if (io->offset > io->file->len)
io->offset = io->file->len;
if (io->offset < 0)
io->offset = 0;
f->left = 0;
}
return count;
}
static int
BuiltinClose (BufFilePtr f, int unused)
{
BuiltinIOPtr io = ((BuiltinIOPtr) f->private);
free (io);
return 1;
}
FontFilePtr
BuiltinFileOpen (char *name)
{
int i;
BuiltinIOPtr io;
BufFilePtr raw, cooked;
if (*name == '/') name++;
for (i = 0; i < builtin_files_count; i++)
if (!strcmp (name, builtin_files[i].name))
break;
if (i == builtin_files_count)
return NULL;
io = malloc (sizeof (BuiltinIORec));
if (!io)
return NULL;
io->offset = 0;
io->file = (void *) &builtin_files[i];
raw = BufFileCreate ((char *) io, BuiltinFill, 0, BuiltinSkip, BuiltinClose);
if (!raw)
{
free (io);
return NULL;
}
if ((cooked = BufFilePushZIP (raw)))
raw = cooked;
else
{
raw->left += raw->bufp - raw->buffer;
raw->bufp = raw->buffer;
}
return (FontFilePtr) raw;
}
int
BuiltinFileClose (FontFilePtr f, int unused)
{
return BufFileClose ((BufFilePtr) f, TRUE);
}
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