I didn't find a program which has to deal with such complex parsing, and
the complexity to write a structure to parse all three kinds of flags seems to be similar to implementing a dos-style `getopt`.
A finite automata may be a good and easy-to-do solution, if I want to do a specific implementation ;)
Weiwen Chen ofey206@gmail.com 于2021年6月27日周日 上午2:51写道：
Well, you could, but it may be easier to copy the structure from a
different program, e.g. programs/ping/ping_main.c.
I considered this choice at first, and I read some of the command line parsing patterns from other files. But robocopy has covered almost all kinds of dos-style command line flags:
- flag with no argument, eg: /x
- colon separated argument, eg: /x:10
- space separated argument list, eg: /x arg1 arg2
The three types are all needed by Waves Central or Scoop.
I didn't find a program which has to deal with such complex parsing, and the complexity to write a structure to parse all three kinds of flags seems to be similar to implementing a dos-style `getopt`. Besides, `getopt` is something standard, and I can refer to lots of implementations. If a dos-style `getopt` is done, maybe it could help new programs or improve existing programs.
I think I could do my test of `getopt` somewhere else, and copy tested code to the wine project. `getopt` is not hard/complex, and there are standard implementations which are proved to be right.
Unittest of such a little program may be too cumbersome. ;)
Weiwen
Zebediah Figura (she/her) zfigura@codeweavers.com 于2021年6月26日周六 下午11:52写道：
Hello Weiwen,
On 6/26/21 6:38 AM, Weiwen Chen wrote:
Hi everyone: I'm Weiwen Chen from Fudan University and I'm working on adding `robocopy.exe` into wine. I stage my work on my github fork https://github.com/ofey404/wine/tree/robocopy.
This program accepts complex command line arguments, so I'm trying to implement my own `getopt` function which accepts dos-style
flags(beginning
with slash, like `/x`).
Well, you could, but it may be easier to copy the structure from a different program, e.g. programs/ping/ping_main.c.
The dummy code is under programs/robocopy https://github.com/ofey404/wine/tree/robocopy/programs/robocopy directory. And I want to add some unittest of `getopt_long()`, in robocopy/tests/getopt.c <
https://github.com/ofey404/wine/blob/fe4a71850b023eefadab5ce357ce4671c1fffc7...
. I try to import my source code of `getopt.c` relatively into unit test file, but I failed with error message like this:
../wine-git/programs/robocopy/tests/getopt.c:20: error: #include
directive
with relative path not allowed
How can I include my source file correctly into the test? Maybe I should configure something in the `configure` script, but I don't know how to
do
it.
I've read some of the builtin programs, but they seldom have a separate `test/` directory, and I don't find examples of unit tests.
We don't really do unit tests of internal functions at all. Maybe there's an argument for it, but I suspect in this case at least it's not really necessary.