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https://github.com/GPSBabel/gpsbabel

GPSBabel: convert, manipulate, and transfer data from GPS programs or GPS receivers. Open Source and supported on MacOS, Windows, Linux, and more. Pointy clicky GUI or a command line version...
https://github.com/GPSBabel/gpsbabel

command-line-app gps gps-coordinates gps-data gps-data-logging gps-device gps-tracking gpsbabel gui linux macos qt qt-gui windows

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GPSBabel: convert, manipulate, and transfer data from GPS programs or GPS receivers. Open Source and supported on MacOS, Windows, Linux, and more. Pointy clicky GUI or a command line version...

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README 

        
If you're interested in contributing to this program, here are some

guidelines.  Submit pull requests to https://github.com/gpsbabel/gpsbabel for

consideration and integration.



Rules to Live By

----------------



Standards are good.   ISO C++, Qt, and POSIX are greatly preferred to

adding more libraries or implementing your own hash maps or other common

functions.



You may find format_skeleton.c and filter_skeleton.c in the source tree

to be helpful examples. Just add meat!



Prefer Qt objects/classes to ISO C/POSIX services.

 * QStrings are reference counted, implicitly shared, and have a

   robust supporting library.

 * QDateTime supports sub-second time and a range of dates far

   beyond 1970->2038 and are much more pleasant to work with

   than ctime/mktime/struct tm.

 * QXmlStreamReader and Writer eliminate the need to explictly quote data.

"But I see strcpy, sprintf, and struct tm and such in the code!"  It's

true; GPSBabel is a tenured project of well over ten years.  We have

code that predates our move to C++/Qt that isn't well tested or has a

low payoff to modernize and uses old constructs.  Our actively

maintained/strategic formats like GPX and KML tend to be better

examples of modern programming and are generally better models to

follow. New code shouldn't be using xstrdup and gbfprintf.



Compilers complain for a reason.   Code shouldn't emit warnings.



The entire world doesn't run .  We regularly test this code on

at least five different OSes.  If you find yourself wanting to insert

compiler or OS specific magic, please resist.



We try to keep a consistent convention in code that's "ours".  We aren't

interested in trying to convert zlib or jeeps to it, but in general we

prefer:



	int

	mumble(int whatever)

	{

        <2spaces>char* pointers_clump_to_type;

	<2spaces>if (whatevever) {

	<4spaces>return blah;

	<2spaces>}

	}



Formatting can be done with astyle using the included style file

astylerc with the command "astyle --options=astylerc {source files}".

astyle is available at http://astyle.sourceforge.net/



The corresponding astyle settings for this are provided in our source

tree in the file named 'astylerc'



Submitting Code

---------------



If you are creating a new target your work should include the following files:

* Yourcode.c and/or Yourcode.h - this is the code required to do your

  conversions and any support files that your code requires.

* vecs.c - an updated vecs.c file implementing your conversion code into

  GPSBabel.

* Makefile.in - an updated Makefile telling the compiler how to build and link

  your conversion into GPSBabel

* testo.d/$TARGET - an updated script that tests your conversion (this should

  produce no output if all is good, see the current testo script for examples)

* YourOutput - a sample file of code produced by your function (used in testo

  and lives in a directory called "reference").

* Documentation - see below.



Please ensure that you are building and testing against the latest code

from the master branch of the Git repository - Note: code changes sometimes

occur frequently!



Documentation

-------------



HTML and text documentation are generated automatically from DocBook

source located in the "xmldoc" directory.  That directory contains

two subdirectories of interest: "formats" and "filters".  If your

contribution adds or affects a format, you'll want to be in the "formats"

directory.  Otherwise, you'll want to be in the "filters" directory.



You should contribute a file called "yourname.xml", where "yourname" is the

name you would give on the command-line to invoke your new format or filter.

For example, the arc filter is documented in "filters/arc.xml".



This file contains a general description of your format or filter, any

limitations in your support for it, and anything else the end user should

know.  For file formats, links to manufacturers' websites are encouraged.

The contents of this file are not valid or even well-formed XML on their own;

they are included into a larger framework.  If you know DocBook, you should

ensure that the contents of this file will validate if included in a .

If you do not know DocBook, see the other files in this directory for examples

or see http://docbook.org/tdg/en/html/docbook.html for the gory details.  Tags

of interest will almost certainly include  for paragraphs,

 for web links, and  for

example command lines.



For each option supported by your format or filter, you should also contribute

a file in the "options" subdirectory called "yourname-youroption.xml", again

using the names you would use on the command line to invoke your format or

filter with that particular option.  For example, the "distance" option to the

"arc" filter is documented in "filters/options/arc-distance.xml".  These

files are similar to the general description above, and should meet the same

validation requirements.



As of this writing, there are two formats that violate this rule: Magellan

serial and Microsoft Streets & Trips.  Because those formats have the same

names as other formats, their descriptions are located in "magellan1.xml" and

"msroute1.xml" respectively.  These are special cases, and you should do your

best to ensure that they remain the only special cases.



Note that the automated framework already includes the name and description of

your format and its options as described in vecs.c and yourcode.c, so there is

no need to repeat that information in your documentation.



Enjoy!



Robert Lipe,

[email protected]