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/*
* libzvbi - Teletext page cache search functions
*
* Copyright (C) 2000, 2001 Michael H. Schimek
*
* Based on code from AleVT 1.5.1
* Copyright (C) 1998, 1999 Edgar Toernig <froese@gmx.de>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: search.h,v 1.5 2005/06/28 00:59:44 mschimek Exp $ */
#ifndef __ZVBI3_SEARCH_H__
#define __ZVBI3_SEARCH_H__
#include <stdarg.h> /* va_list */
#include "page.h"
VBI3_BEGIN_DECLS
/**
* @ingroup Search
* Return codes of the vbi3_search_next() function.
*/
typedef enum {
/**
* Some error occured, condition unclear. Call vbi3_search_delete().
*/
VBI3_SEARCH_ERROR = -3,
/**
* No pages in the cache, @a pg is invalid.
*/
VBI3_SEARCH_CACHE_EMPTY,
/**
* The search has been aborted by the progress callback function.
* @a pg points to the current page as in success case, except
* no text is highlighted. Another vbi3_search_next() call
* continues from this page.
*/
VBI3_SEARCH_ABORTED,
/**
* Pattern not found, @a pg is invalid. Another vbi3_search_next()
* call restarts from the original starting point.
*/
VBI3_SEARCH_NOT_FOUND = 0,
/**
* Pattern found. @a pg points to the page ready for display with
* the found pattern highlighted.
*/
VBI3_SEARCH_SUCCESS
} vbi3_search_status;
/**
* @ingroup Search
* @brief Search context.
*
* The contents of this structure are private.
*
* Call vbi3_search_new_ucs2() or vbi3_search_new_utf8() to
* allocate a search context.
*/
typedef struct _vbi3_search vbi3_search;
/**
* @ingroup Search
* @param search Search context passed to vbi3_search_next().
* @param pg Current page being searched, formatted as requested
* with vbi3_search_next(). Do not modify or free this page, if
* necessary you can call vbi3_page_copy().
* @param user_data User data pointer passed to vbi3_search_next().
*
* Search progress callback function.
*
* @returns:
* @c FALSE to abort the search, then vbi3_search_next() will return
* @c VBI3_SEARCH_ABORTED.
*/
typedef vbi3_bool
vbi3_search_progress_cb (vbi3_search * search,
const vbi3_page * pg,
void * user_data);
/**
* @addtogroup Search
* @{
*/
extern vbi3_search_status
vbi3_search_next_va_list (vbi3_search * s,
const vbi3_page ** pg,
int dir,
va_list format_options)
__attribute__ ((_vbi3_nonnull (1, 2)));
extern vbi3_search_status
vbi3_search_next (vbi3_search * s,
const vbi3_page ** pg,
int dir,
...)
__attribute__ ((_vbi3_nonnull (1, 2),
_vbi3_sentinel));
extern void
vbi3_search_delete (vbi3_search * s);
extern vbi3_search *
vbi3_search_ucs2_new (vbi3_cache * ca,
const vbi3_network * nk,
vbi3_pgno pgno,
vbi3_subno subno,
const uint16_t * pattern,
unsigned long pattern_size,
vbi3_bool casefold,
vbi3_bool regexp,
vbi3_search_progress_cb *progress,
void * user_data)
__attribute__ ((malloc,
_vbi3_nonnull (1, 2, 5)));
extern vbi3_search *
vbi3_search_utf8_new (vbi3_cache * ca,
const vbi3_network * nk,
vbi3_pgno pgno,
vbi3_subno subno,
const char * pattern,
vbi3_bool casefold,
vbi3_bool regexp,
vbi3_search_progress_cb *progress,
void * user_data)
__attribute__ ((malloc,
_vbi3_nonnull (1, 2, 5)));
/** @} */
VBI3_END_DECLS
#endif /* __ZVBI3_CACHE_H__ */
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