f87720dff9
Add a new type to distinguish between closed circuit (CCR) and semi-closed circuit (SCR) diving. Some dive computers from HW and DiveSystem/Ratio support this. Because the CCR/SCR abbreviations are more commonly used, let's take the opportunity to also rename the existing DC_DIVEMODE_CC. To preserve backwards compatibility, a macro is added to map the old name to the new one. Reported-by: Jan Mulder <jlmulder@xs4all.nl>
200 lines
4.3 KiB
Groff
200 lines
4.3 KiB
Groff
.\"
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.\" libdivecomputer
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.\"
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.\" Copyright (C) 2017 Kristaps Dzonsons <kristaps@bsd.lv>
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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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.Dd January 5, 2017
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.Dt DC_PARSER_GET_FIELD 3
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.Os
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.Sh NAME
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.Nm dc_parser_get_field
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.Nd extract a field from a parsed dive
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.Sh LIBRARY
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.Lb libdivecomputer
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.Sh SYNOPSIS
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.In libdivecomputer/parser.h
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.Ft dc_status_t
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.Fo dc_parser_get_field
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.Fa "dc_parser_t *parser"
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.Fa "dc_field_type_t type"
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.Fa "unsigned int flags"
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.Fa "void *value"
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.Fc
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.Sh DESCRIPTION
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Extract a field from a dive,
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.Fa parser ,
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previously initialised with
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.Xr dc_parser_set_data 3 .
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The
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.Fa value
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field type depends upon the
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.Fa type .
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The
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.Fa flags
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field is ignored for all types but
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.Dv DC_FIELD_GASMIX
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and
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.Dv DC_FIELD_TANK .
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.Pp
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The
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.Fa type
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may be one of the following values:
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.Bl -tag -width Ds
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.It Dv DC_FIELD_DIVETIME
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Time (duration) of dive in seconds.
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The
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.Fa value
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must be an
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.Vt unsigned int .
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.It Dv DC_FIELD_MAXDEPTH
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Maximum depth in metres.
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The
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.Fa value
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must be a
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.Vt double .
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.It Dv DC_FIELD_AVGDEPTH
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Average depth (over all samples) in metres.
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The
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.Fa value
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must be a
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.Vt double .
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.It Dv DC_FIELD_GASMIX_COUNT
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Number of different gas mixes used in this dive.
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The
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.Fa value
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must be a
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.Vt unsigned int .
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.It Dv DC_FIELD_GASMIX
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Mixture for a particular gas.
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The
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.Fa value
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must be a
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.Vt dc_gasmix_t ,
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which has
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.Vt double
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fields for
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.Va oxygen ,
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.Va helium ,
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and
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.Va nitrogen .
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These are set to the unit fraction of gas (not percentage).
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The
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.Fa flags
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value is interpreted as the gas mixture index, which must be less than the
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value of
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.Dv DC_FIELD_GASMIX_COUNT .
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.It Dv DC_FIELD_SALINITY
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The water salinity as a
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.Vt dc_salinity_t
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field, which consists of a
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.Va type ,
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.Dv DC_WATER_FRESH
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or
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.Dv DC_WATER_SALT ,
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and the salinity
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.Va density .
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.It Dv DC_FIELD_ATMOSPHERIC
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Atmospheric pressure in bar.
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The
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.Fa value
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field must be a
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.Vt double .
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.It Dv DC_FIELD_TEMPERATURE_SURFACE
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Air temperature (at the surface) in Celsius.
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The
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.Fa value
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field must be a
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.Vt double .
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.It Dv DC_FIELD_TEMPERATURE_MINIMUM
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Minimum water temperature surface in Celsius.
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The
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.Fa value
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field must be a
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.Vt double .
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.It Dv DC_FIELD_TEMPERATURE_MAXIMUM
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Maximum water temperature in Celsius.
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The
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.Fa value
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field must be a
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.Vt double .
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.It Dv DC_FIELD_TANK_COUNT
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The number of tanks as an
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.Vt unsigned int .
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.It Dv DC_FIELD_TANK
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Tank configuration as a
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.Vt dc_tank_t .
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This structure consists of a
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.Va gasmix ,
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which may be retrieved with
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.Dv DC_FIELD_GASMIX ;
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.Va type ,
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the tank volume units as
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.Dv DC_TANKVOLUME_NONE ,
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.Dv DC_TANKVOLUME_IMPERIAL ,
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or
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.Dv DC_TANKVOLUME_METRIC ;
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.Va volume ,
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the tank volume in bar or zero if the tank is
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.Dv DC_TANKVOLUME_NONE ;
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.Va workpressure ,
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the work pressure in bar or zero if
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.Dv DC_TANKVOLUME_NONE
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and maybe zero if
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.Dv DC_TANKVOLUME_METRIC ;
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.Va beginpressure
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and
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.Va endpressure
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being the pressures at start and finish in bar.
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The
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.Fa flags
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value is the tank index.
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.It Dv DC_FIELD_DIVEMODE
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Mode of the dive:
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.Dv DC_DIVEMODE_FREEDIVE
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for free-diving,
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.Dv DC_DIVEMODE_GAUGE
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for gauge (i.e., running as a record and not computing, say,
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decompression events),
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.Dv DC_DIVEMODE_OC
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for standard open-circuit diving, and
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.Dv DC_DIVEMODE_CCR
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and
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.Dv DC_DIVEMODE_SCR
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for respectively closed circuit and semi closed circuit
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.Dq rebreather
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diving.
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.El
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.Sh RETURN VALUES
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Returns
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.Dv DC_STATUS_SUCCESS
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if the field was retrieved,
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.Dv DC_STATUS_UNSUPPORTED
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if the field is not supported by the device, or other error messages on
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further failure.
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.Sh SEE ALSO
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.Xr dc_parser_set_data 3
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.Sh AUTHORS
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The
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.Lb libdivecomputer
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library was written by
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.An Jef Driesen ,
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.Mt jef@libdivecomputer.org .
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The manpages were written by
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.An Kristaps Dzonsons ,
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.Mt kristaps@bsd.lv .
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