Because the sample struct is passed by value, the size of the structure can't be changed without also changing the function signature and breaking backwards compatibility. This prevents adding new fields in the future, to support some new features. When passing the sample struct by reference using a pointer, the size of the pointer does always remains the same.
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2008 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef PARSER_PRIVATE_H
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#define PARSER_PRIVATE_H
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#include <libdivecomputer/context.h>
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#include <libdivecomputer/parser.h>
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#define DEF_DENSITY_FRESH 1000.0
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#define DEF_DENSITY_SALT 1025.0
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#define DEF_ATMOSPHERIC ATM
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct dc_parser_t;
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struct dc_parser_vtable_t;
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typedef struct dc_parser_vtable_t dc_parser_vtable_t;
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struct dc_parser_t {
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const dc_parser_vtable_t *vtable;
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dc_context_t *context;
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const unsigned char *data;
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unsigned int size;
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};
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struct dc_parser_vtable_t {
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size_t size;
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dc_family_t type;
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dc_status_t (*set_data) (dc_parser_t *parser, const unsigned char *data, unsigned int size);
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dc_status_t (*set_clock) (dc_parser_t *parser, unsigned int devtime, dc_ticks_t systime);
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dc_status_t (*set_atmospheric) (dc_parser_t *parser, double atmospheric);
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dc_status_t (*set_density) (dc_parser_t *parser, double density);
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dc_status_t (*datetime) (dc_parser_t *parser, dc_datetime_t *datetime);
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dc_status_t (*field) (dc_parser_t *parser, dc_field_type_t type, unsigned int flags, void *value);
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dc_status_t (*samples_foreach) (dc_parser_t *parser, dc_sample_callback_t callback, void *userdata);
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dc_status_t (*destroy) (dc_parser_t *parser);
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};
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dc_parser_t *
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dc_parser_allocate (dc_context_t *context, const dc_parser_vtable_t *vtable);
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void
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dc_parser_deallocate (dc_parser_t *parser);
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int
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dc_parser_isinstance (dc_parser_t *parser, const dc_parser_vtable_t *vtable);
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typedef struct sample_statistics_t {
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unsigned int divetime;
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double maxdepth;
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} sample_statistics_t;
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#define SAMPLE_STATISTICS_INITIALIZER {0, 0.0}
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void
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sample_statistics_cb (dc_sample_type_t type, const dc_sample_value_t *value, void *userdata);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* PARSER_PRIVATE_H */
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