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.
242 lines
6.5 KiB
C
242 lines
6.5 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 <string.h>
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#include <libdivecomputer/mares_darwin.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), &mares_darwin_parser_vtable)
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#define DARWIN 0
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#define DARWINAIR 1
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typedef struct mares_darwin_parser_t mares_darwin_parser_t;
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struct mares_darwin_parser_t {
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dc_parser_t base;
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unsigned int headersize;
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unsigned int samplesize;
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};
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static dc_status_t mares_darwin_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t mares_darwin_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t mares_darwin_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 mares_darwin_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static dc_status_t mares_darwin_parser_destroy (dc_parser_t *abstract);
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static const dc_parser_vtable_t mares_darwin_parser_vtable = {
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DC_FAMILY_MARES_DARWIN,
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mares_darwin_parser_set_data, /* set_data */
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mares_darwin_parser_get_datetime, /* datetime */
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mares_darwin_parser_get_field, /* fields */
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mares_darwin_parser_samples_foreach, /* samples_foreach */
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mares_darwin_parser_destroy /* destroy */
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};
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dc_status_t
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mares_darwin_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int model)
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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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mares_darwin_parser_t *parser = (mares_darwin_parser_t *) malloc (sizeof (mares_darwin_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, &mares_darwin_parser_vtable);
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if (model == DARWINAIR) {
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parser->headersize = 60;
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parser->samplesize = 3;
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} else {
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parser->headersize = 52;
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parser->samplesize = 2;
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}
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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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mares_darwin_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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mares_darwin_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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static dc_status_t
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mares_darwin_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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mares_darwin_parser_t *parser = (mares_darwin_parser_t *) abstract;
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if (abstract->size < parser->headersize)
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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_be (p);
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datetime->month = p[2];
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datetime->day = p[3];
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datetime->hour = p[4];
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datetime->minute = p[5];
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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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mares_darwin_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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mares_darwin_parser_t *parser = (mares_darwin_parser_t *) abstract;
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if (abstract->size < parser->headersize)
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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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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_be (p + 0x06) * 20;
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break;
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case DC_FIELD_MAXDEPTH:
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*((double *) value) = array_uint16_be (p + 0x08) / 10.0;
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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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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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mares_darwin_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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mares_darwin_parser_t *parser = (mares_darwin_parser_t *) abstract;
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if (abstract->size < parser->headersize)
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return DC_STATUS_DATAFORMAT;
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unsigned int time = 0;
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unsigned int pressure = array_uint16_be (abstract->data + 0x17);
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unsigned int offset = parser->headersize;
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while (offset + parser->samplesize <= abstract->size) {
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dc_sample_value_t sample = {0};
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unsigned int value = array_uint16_le (abstract->data + offset);
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unsigned int depth = value & 0x07FF;
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unsigned int ascent = (value & 0xE000) >> 13;
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unsigned int violation = (value & 0x1000) >> 12;
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unsigned int deco = (value & 0x0800) >> 11;
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// Surface Time (seconds).
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time += 20;
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sample.time = time;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Depth (1/10 m).
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sample.depth = depth / 10.0;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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// Ascent rate
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if (ascent) {
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sample.event.type = SAMPLE_EVENT_ASCENT;
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sample.event.time = 0;
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sample.event.flags = 0;
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sample.event.value = ascent;
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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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// Deco violation
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if (violation) {
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sample.event.type = SAMPLE_EVENT_CEILING;
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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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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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// Deco stop
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if (deco) {
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sample.event.type = SAMPLE_EVENT_DECOSTOP;
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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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if (callback) callback (DC_SAMPLE_EVENT, sample, userdata);
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}
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if (parser->samplesize == 3) {
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unsigned int type = (time / 20 + 2) % 3;
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if (type == 0) {
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// Tank Pressure (bar)
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pressure -= abstract->data[offset + 2];
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sample.pressure.tank = 0;
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sample.pressure.value = pressure;
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if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
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}
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}
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offset += parser->samplesize;
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}
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return DC_STATUS_SUCCESS;
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}
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