mirror of
https://github.com/gnif/LookingGlass.git
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106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
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/**
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* Looking Glass
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* Copyright © 2017-2023 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "cursor.h"
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#include "common/util.h"
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#include <string.h>
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#include <errno.h>
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struct MemFile
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{
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const char * data;
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int size;
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int pos;
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};
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static int x11cursor_read(XcursorFile *file, unsigned char * buf, int len)
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{
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struct MemFile * f = (struct MemFile *)file->closure;
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if (f->pos == f->size)
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return 0;
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len = min(f->size - f->pos, len);
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memcpy(buf, f->data + f->pos, len);
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f->pos += len;
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return len;
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}
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static int x11cursor_write(XcursorFile *file, unsigned char * buf, int len)
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{
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errno = -EINVAL;
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return -1;
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}
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static int x11cursor_seek(XcursorFile *file, long offset, int whence)
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{
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struct MemFile * f = (struct MemFile *)file->closure;
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long target;
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switch(whence)
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{
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case SEEK_SET:
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target = offset;
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break;
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case SEEK_CUR:
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target = f->pos + offset;
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break;
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case SEEK_END:
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target = f->size + offset;
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break;
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default:
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errno = -EINVAL;
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return -1;
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}
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if (target < 0 || target > f->size)
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{
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errno = -EINVAL;
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return -1;
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}
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f->pos = target;
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return target;
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}
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XcursorImages * x11cursor_load(const char * cursor, int size)
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{
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struct MemFile closure =
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{
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.data = cursor,
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.size = size,
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.pos = 0
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};
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XcursorFile f =
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{
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.closure = &closure,
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.read = x11cursor_read,
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.write = x11cursor_write,
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.seek = x11cursor_seek
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};
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return XcursorXcFileLoadAllImages(&f);
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}
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