55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2012 (c) Jarek Czekalski <jarekczek@poczta.onet.pl>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#ifndef _MISC_H_
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#define _MISC_H_
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struct resolution_s {
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long cx;
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long cy;
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};
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typedef struct resolution_s resolution_t;
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struct resolution_list_s {
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resolution_t *resolutions;
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long cnt;
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};
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typedef struct resolution_list_s resolution_list_t;
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void resolution_list_init(resolution_list_t *list);
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void resolution_list_cleanup(resolution_list_t *list);
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void resolution_list_add(resolution_list_t *list, resolution_t *resolution);
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/// Fill <code>resolution</code> with the closest resolution found in
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/// <code>list</code>.
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/** If <code>list</code> is empty,
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* the <code>resolution</code> is unchanged.
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* If <code>resolution</code> is empty,
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* the biggest resolution is chosen. */
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void get_closest_resolution(resolution_t *resolution, resolution_list_t *list);
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/// Returns 1 if the struct is null, otherwise 0
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int is_struct_null_fun(const void *pdata, const int len);
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/// Returns 1 if the struct is null, otherwise 0
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#define is_struct_null(pdata) is_struct_null_fun(pdata, sizeof(*pdata))
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#endif
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