007479fc92
The term "backend" can be confusing because it can refer to both the virtual function table and the device/parser backends. The use of the term "vtable" avoids this.
357 lines
9.0 KiB
C
357 lines
9.0 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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#include <stdlib.h>
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#include <libdivecomputer/suunto_eon.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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typedef struct suunto_eon_parser_t suunto_eon_parser_t;
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struct suunto_eon_parser_t {
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dc_parser_t base;
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int spyder;
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// Cached fields.
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unsigned int cached;
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unsigned int divetime;
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unsigned int maxdepth;
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};
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static dc_status_t suunto_eon_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t suunto_eon_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t suunto_eon_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 suunto_eon_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static dc_status_t suunto_eon_parser_destroy (dc_parser_t *abstract);
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static const dc_parser_vtable_t suunto_eon_parser_vtable = {
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DC_FAMILY_SUUNTO_EON,
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suunto_eon_parser_set_data, /* set_data */
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suunto_eon_parser_get_datetime, /* datetime */
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suunto_eon_parser_get_field, /* fields */
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suunto_eon_parser_samples_foreach, /* samples_foreach */
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suunto_eon_parser_destroy /* destroy */
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};
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static int
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parser_is_suunto_eon (dc_parser_t *abstract)
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{
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if (abstract == NULL)
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return 0;
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return abstract->vtable == &suunto_eon_parser_vtable;
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}
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dc_status_t
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suunto_eon_parser_create (dc_parser_t **out, dc_context_t *context, int spyder)
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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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suunto_eon_parser_t *parser = (suunto_eon_parser_t *) malloc (sizeof (suunto_eon_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, &suunto_eon_parser_vtable);
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// Set the default values.
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parser->spyder = spyder;
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parser->cached = 0;
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parser->divetime = 0;
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parser->maxdepth = 0;
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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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suunto_eon_parser_destroy (dc_parser_t *abstract)
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{
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if (! parser_is_suunto_eon (abstract))
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return DC_STATUS_INVALIDARGS;
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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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suunto_eon_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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suunto_eon_parser_t *parser = (suunto_eon_parser_t *) abstract;
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if (! parser_is_suunto_eon (abstract))
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return DC_STATUS_INVALIDARGS;
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// Reset the cache.
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parser->cached = 0;
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parser->divetime = 0;
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parser->maxdepth = 0;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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suunto_eon_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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suunto_eon_parser_t *parser = (suunto_eon_parser_t *) abstract;
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if (abstract->size < 6 + 5)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data + 6;
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if (datetime) {
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if (parser->spyder) {
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datetime->year = p[0] + (p[0] < 90 ? 2000 : 1900);
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datetime->month = p[1];
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datetime->day = p[2];
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datetime->hour = p[3];
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datetime->minute = p[4];
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} else {
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datetime->year = bcd2dec (p[0]) + (bcd2dec (p[0]) < 85 ? 2000 : 1900);
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datetime->month = bcd2dec (p[1]);
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datetime->day = bcd2dec (p[2]);
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datetime->hour = bcd2dec (p[3]);
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datetime->minute = bcd2dec (p[4]);
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}
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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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suunto_eon_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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suunto_eon_parser_t *parser = (suunto_eon_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 < 13)
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return DC_STATUS_DATAFORMAT;
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if (!parser->cached) {
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unsigned int interval = data[3];
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unsigned int nsamples = 0;
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unsigned int depth = 0, maxdepth = 0;
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unsigned int offset = 11;
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while (offset < size && data[offset] != 0x80) {
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unsigned char value = data[offset++];
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if (value < 0x7d || value > 0x82) {
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depth += (signed char) value;
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if (depth > maxdepth)
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maxdepth = depth;
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nsamples++;
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}
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}
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// Store the offset to the end marker.
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unsigned int marker = offset;
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if (marker + 2 >= size || data[marker] != 0x80)
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return DC_STATUS_DATAFORMAT;
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parser->cached = 1;
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parser->divetime = nsamples * interval;
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parser->maxdepth = maxdepth;
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}
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dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
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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) = parser->divetime;
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break;
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case DC_FIELD_MAXDEPTH:
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*((double *) value) = parser->maxdepth * FEET;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = 1;
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break;
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case DC_FIELD_GASMIX:
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gasmix->helium = 0.0;
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if ((data[4] & 0x80) && !parser->spyder)
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gasmix->oxygen = data[0x05] / 100.0;
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else
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gasmix->oxygen = 0.21;
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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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suunto_eon_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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suunto_eon_parser_t *parser = (suunto_eon_parser_t *) abstract;
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if (! parser_is_suunto_eon (abstract))
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return DC_STATUS_INVALIDARGS;
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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 < 13)
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return DC_STATUS_DATAFORMAT;
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// Find the maximum depth.
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unsigned int depth = 0, maxdepth = 0;
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unsigned int offset = 11;
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while (offset < size && data[offset] != 0x80) {
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unsigned char value = data[offset++];
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if (value < 0x7d || value > 0x82) {
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depth += (signed char) value;
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if (depth > maxdepth)
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maxdepth = depth;
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}
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}
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// Store the offset to the end marker.
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unsigned int marker = offset;
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if (marker + 2 >= size || data[marker] != 0x80)
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return DC_STATUS_DATAFORMAT;
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// The Solution Nitrox/Vario stores nitrox data, not tank pressure.
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unsigned int nitrox = !parser->spyder && (data[4] & 0x80);
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unsigned int time = 0;
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unsigned int interval = data[3];
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unsigned int complete = 1;
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dc_sample_value_t sample = {0};
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// Time
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sample.time = time;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Tank Pressure (2 bar)
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if (!nitrox) {
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sample.pressure.tank = 0;
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sample.pressure.value = data[5] * 2;
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if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
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}
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// Depth (0 ft)
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sample.depth = 0;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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depth = 0;
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offset = 11;
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while (offset < size && data[offset] != 0x80) {
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dc_sample_value_t sample = {0};
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unsigned char value = data[offset++];
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if (complete) {
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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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complete = 0;
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}
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if (value < 0x7d || value > 0x82) {
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// Delta depth.
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depth += (signed char) value;
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// Temperature at maximum depth (°C)
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if (depth == maxdepth) {
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if (parser->spyder)
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sample.temperature = (signed char) data[marker + 1];
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else
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sample.temperature = data[marker + 1] - 40;
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if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
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}
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// Depth (ft).
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sample.depth = depth * FEET;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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complete = 1;
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} else {
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// Event.
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sample.event.time = 0;
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sample.event.flags = 0;
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sample.event.value = 0;
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switch (value) {
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case 0x7d: // Surface
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sample.event.type = SAMPLE_EVENT_SURFACE;
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break;
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case 0x7e: // Deco, ASC
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sample.event.type = SAMPLE_EVENT_DECOSTOP;
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break;
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case 0x7f: // Ceiling, ERR
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sample.event.type = SAMPLE_EVENT_CEILING;
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break;
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case 0x81: // Slow
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sample.event.type = SAMPLE_EVENT_ASCENT;
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break;
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default: // Unknown
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WARNING (abstract->context, "Unknown event");
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break;
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}
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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}
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// Time
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if (complete) {
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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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}
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// Tank Pressure (2 bar)
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if (!nitrox) {
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sample.pressure.tank = 0;
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sample.pressure.value = data[offset + 2] * 2;
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if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
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}
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// Depth (0 ft)
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sample.depth = 0;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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return DC_STATUS_SUCCESS;
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}
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