/ocr/ocrservice/jni/hydrogen/include/leptonica/bbuffer.h

 1/*====================================================================*
 2 -  Copyright (C) 2001 Leptonica.  All rights reserved.
 3 -  This software is distributed in the hope that it will be
 4 -  useful, but with NO WARRANTY OF ANY KIND.
 5 -  No author or distributor accepts responsibility to anyone for the
 6 -  consequences of using this software, or for whether it serves any
 7 -  particular purpose or works at all, unless he or she says so in
 8 -  writing.  Everyone is granted permission to copy, modify and
 9 -  redistribute this source code, for commercial or non-commercial
10 -  purposes, with the following restrictions: (1) the origin of this
11 -  source code must not be misrepresented; (2) modified versions must
12 -  be plainly marked as such; and (3) this notice may not be removed
13 -  or altered from any source or modified source distribution.
14 *====================================================================*/
15
16#ifndef  LEPTONICA_BBUFFER_H
17#define  LEPTONICA_BBUFFER_H
18
19/*
20 *  bbuffer.h
21 *
22 *      Expandable byte buffer for reading data in from memory and
23 *      writing data out to other memory.
24 *
25 *      This implements a queue of bytes, so data read in is put
26 *      on the "back" of the queue (i.e., the end of the byte array)
27 *      and data written out is taken from the "front" of the queue
28 *      (i.e., from an index marker "nwritten" that is initially set at
29 *      the beginning of the array.)  As usual with expandable
30 *      arrays, we keep the size of the allocated array and the
31 *      number of bytes that have been read into the array.
32 *
33 *      For implementation details, see bbuffer.c.
34 */
35
36struct ByteBuffer
37{
38    l_int32      nalloc;       /* size of allocated byte array            */
39    l_int32      n;            /* number of bytes read into to the array  */
40    l_int32      nwritten;     /* number of bytes written from the array  */
41    l_uint8     *array;        /* byte array                              */
42};
43typedef struct ByteBuffer BBUFFER;
44
45
46#endif  /* LEPTONICA_BBUFFER_H */