6419e189a4
Currently, each backend has it's own function to verify whether the object vtable pointer is the expected one. All these functions can be removed in favor of a single isintance function in the base class, which takes the expected vtable pointer as a parameter. Functions which are called through the vtable, don't need to verify the vtable pointer, and those checks are removed.
297 lines
8.4 KiB
C
297 lines
8.4 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2011 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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#include <stdlib.h>
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#include <libdivecomputer/atomics_cobalt.h>
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#include <libdivecomputer/units.h>
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#include "context-private.h"
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#include "parser-private.h"
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#include "array.h"
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#define ISINSTANCE(parser) dc_parser_isinstance((parser), &atomics_cobalt_parser_vtable)
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#define SZ_HEADER 228
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#define SZ_GASMIX 18
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#define SZ_GASSWITCH 6
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#define SZ_SEGMENT 16
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typedef struct atomics_cobalt_parser_t atomics_cobalt_parser_t;
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struct atomics_cobalt_parser_t {
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dc_parser_t base;
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// Depth calibration.
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double atmospheric;
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double hydrostatic;
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};
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static dc_status_t atomics_cobalt_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t atomics_cobalt_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t atomics_cobalt_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value);
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static dc_status_t atomics_cobalt_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static dc_status_t atomics_cobalt_parser_destroy (dc_parser_t *abstract);
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static const dc_parser_vtable_t atomics_cobalt_parser_vtable = {
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DC_FAMILY_ATOMICS_COBALT,
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atomics_cobalt_parser_set_data, /* set_data */
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atomics_cobalt_parser_get_datetime, /* datetime */
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atomics_cobalt_parser_get_field, /* fields */
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atomics_cobalt_parser_samples_foreach, /* samples_foreach */
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atomics_cobalt_parser_destroy /* destroy */
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};
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dc_status_t
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atomics_cobalt_parser_create (dc_parser_t **out, dc_context_t *context)
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{
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if (out == NULL)
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return DC_STATUS_INVALIDARGS;
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// Allocate memory.
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) malloc (sizeof (atomics_cobalt_parser_t));
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if (parser == NULL) {
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ERROR (context, "Failed to allocate memory.");
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return DC_STATUS_NOMEMORY;
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}
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// Initialize the base class.
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parser_init (&parser->base, context, &atomics_cobalt_parser_vtable);
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// Set the default values.
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parser->atmospheric = 0.0;
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parser->hydrostatic = 1025.0 * GRAVITY;
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*out = (dc_parser_t*) parser;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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atomics_cobalt_parser_destroy (dc_parser_t *abstract)
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{
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// Free memory.
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free (abstract);
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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atomics_cobalt_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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return DC_STATUS_SUCCESS;
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}
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dc_status_t
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atomics_cobalt_parser_set_calibration (dc_parser_t *abstract, double atmospheric, double hydrostatic)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t*) abstract;
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if (!ISINSTANCE (abstract))
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return DC_STATUS_INVALIDARGS;
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parser->atmospheric = atmospheric;
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parser->hydrostatic = hydrostatic;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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atomics_cobalt_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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if (abstract->size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data;
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if (datetime) {
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datetime->year = array_uint16_le (p + 0x14);
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datetime->month = p[0x16];
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datetime->day = p[0x17];
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datetime->hour = p[0x18];
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datetime->minute = p[0x19];
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datetime->second = 0;
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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atomics_cobalt_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) abstract;
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if (abstract->size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data;
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dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
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double atmospheric = 0.0;
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if (parser->atmospheric)
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atmospheric = parser->atmospheric;
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else
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atmospheric = array_uint16_le (p + 0x26) * BAR / 1000.0;
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if (value) {
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switch (type) {
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case DC_FIELD_DIVETIME:
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*((unsigned int *) value) = array_uint16_le (p + 0x58) * 60;
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break;
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case DC_FIELD_MAXDEPTH:
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*((double *) value) = (array_uint16_le (p + 0x56) * BAR / 1000.0 - atmospheric) / parser->hydrostatic;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = p[0x2a];
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break;
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case DC_FIELD_GASMIX:
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gasmix->helium = p[SZ_HEADER + SZ_GASMIX * flags + 5] / 100.0;
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gasmix->oxygen = p[SZ_HEADER + SZ_GASMIX * flags + 4] / 100.0;
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gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
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break;
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default:
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return DC_STATUS_UNSUPPORTED;
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}
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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atomics_cobalt_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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atomics_cobalt_parser_t *parser = (atomics_cobalt_parser_t *) abstract;
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const unsigned char *data = abstract->data;
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unsigned int size = abstract->size;
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if (size < SZ_HEADER)
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return DC_STATUS_DATAFORMAT;
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unsigned int interval = data[0x1a];
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unsigned int ngasmixes = data[0x2a];
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unsigned int nswitches = data[0x2b];
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unsigned int nsegments = array_uint16_le (data + 0x50);
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unsigned int header = SZ_HEADER + SZ_GASMIX * ngasmixes +
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SZ_GASSWITCH * nswitches;
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if (size < header + SZ_SEGMENT * nsegments)
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return DC_STATUS_DATAFORMAT;
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double atmospheric = 0.0;
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if (parser->atmospheric)
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atmospheric = parser->atmospheric;
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else
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atmospheric = array_uint16_le (data + 0x26) * BAR / 1000.0;
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// Previous gas mix - initialize with impossible value
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unsigned int gasmix_previous = 0xFFFFFFFF;
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unsigned int time = 0;
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unsigned int in_deco = 0;
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unsigned int offset = header;
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while (offset + SZ_SEGMENT <= size) {
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dc_sample_value_t sample = {0};
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// Time (seconds).
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time += interval;
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sample.time = time;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Depth (1/1000 bar).
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unsigned int depth = array_uint16_le (data + offset + 0);
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sample.depth = (depth * BAR / 1000.0 - atmospheric) / parser->hydrostatic;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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// Pressure (1 psi).
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unsigned int pressure = array_uint16_le (data + offset + 2);
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sample.pressure.tank = 0;
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sample.pressure.value = pressure * PSI / BAR;
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if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
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// Current gas mix
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unsigned int gasmix = data[offset + 4];
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if (gasmix >= ngasmixes) {
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return DC_STATUS_DATAFORMAT;
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}
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if (gasmix != gasmix_previous) {
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unsigned int o2 = data[SZ_HEADER + SZ_GASMIX * gasmix + 4];
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unsigned int he = data[SZ_HEADER + SZ_GASMIX * gasmix + 5];
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sample.event.type = SAMPLE_EVENT_GASCHANGE2;
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sample.event.time = 0;
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sample.event.flags = 0;
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sample.event.value = o2 | (he << 16);
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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gasmix_previous = gasmix;
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}
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// Temperature (1 °F).
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unsigned int temperature = data[offset + 8];
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sample.temperature = (temperature - 32.0) * (5.0 / 9.0);
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if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
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// violation status
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sample.event.type = 0;
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sample.event.time = 0;
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sample.event.value = 0;
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sample.event.flags = 0;
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unsigned int violation = data[offset + 11];
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if (violation & 0x01) {
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sample.event.type = SAMPLE_EVENT_ASCENT;
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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if (violation & 0x04) {
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sample.event.type = SAMPLE_EVENT_CEILING;
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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if (violation & 0x08) {
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sample.event.type = SAMPLE_EVENT_PO2;
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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// NDL & deco
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unsigned int ndl = data[offset + 5] * 60;
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if (ndl > 0)
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in_deco = 0;
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else if (ndl == 0 && (violation & 0x02))
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in_deco = 1;
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if (in_deco)
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sample.deco.type = DC_DECO_DECOSTOP;
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else
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sample.deco.type = DC_DECO_NDL;
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sample.deco.time = ndl;
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sample.deco.depth = 0.0;
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if (callback) callback (DC_SAMPLE_DECO, sample, userdata);
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offset += SZ_SEGMENT;
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}
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return DC_STATUS_SUCCESS;
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}
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