I am trying to build config file parser (c++ application)from scratch using tools like lex and yacc. The parser will be able to parse files like
# Sub group example
petName = Tommy
Owner = {
pet = "%petName%"
}
Is there any step by step guide/link to articles on how to achieve this using tools like lex and yacc? The idea is I will write a class say Config (c++) with methods like getConfig(string propName). If I invoke like config.getConfig(Owner.pet), it will return me Tommy.
Boost Property Tree
It was designed for configuration files. It does reading, writing in the following formats:
INI
INFO
XML
JSON
Here is the five minute tutorial page which should give you a good idea:
http://www.boost.org/doc/libs/1_47_0/doc/html/boost_propertytree/tutorial.html
Related
I'm new to C++ compare to my ex in using Java and C#. I often use xsd.exe in C#(a plugin in visual studio) to generate C# class from an XML schema
In java I use this command
I have tried using several tools such as(XBEditor, WinLMX,...) to generate C++ class but the result is often different between them and It doesn't look like a C# or Java class but contain too many other information. I just want to ask what is the tool used the most in parsing .xsd to .cpp or In Cpp, this topic doesn't have much support.
Using xsd.exe can also parse .xsd to C++ code by this command :
xsd /language:CPP your.xsd /classes.
It will produce your.h file.
I went through samples and other questions, people are mostly using Workspaces. All I have is a single file and no workspace, how can I format it using Formatter static methods ?
You can either create a Solution and add the file to a project in that Solution (using Solution.Create(), or else use the basic formatting provided by NormalizeWhitespace().
Is there a tool that generates C/C++ source code from XML (or something similar) to create command line argument parsing functionality?
Now a longer explanation of the question:
I have up til now used gengetopt for command line argument parsing. It is a nice tool that generates C source code from its own configuration format (a text file). For instance the gengetopt configuration line
option "max-threads" m "max number of threads" int default="1" optional
among other things generates a variable
int max_threads_arg;
that I later can use.
But gengetopt doesn't provide me with this functionality:
A way to generate Unix man pages from the gengetopt configuration format
A way to generate DocBook or HTML documentation from the gengetopt configuration format
A way to reuse C/C++ source code and to reuse gengetopt configuration lines when I have multiple programs that share some common command line options
Of course gengetopt can provide me with a documentation text by running
command --help
but I am searching for marked up documentation (e.g. HTML, DocBook, Unix man pages).
Do you know if there is any C/C++ command line argument tool/library with a liberal open source license that would suite my needs?
I guess that such a tool would use XML to specify the command line arguments. That would make it easy to generate documentation in different formats (e.g. man pages). The XML file should only be needed at build time to generate the C/C++ source code.
I know it is possible to use some other command line argument parsing library to read a configuration file in XML at runtime but I am looking for a tool that generate C/C++ source code from XML (or something similar) at build time.
Update 1
I would like to do as much as possible of the computations at compile time and as less as possible at run time. So I would like to avoid libraries that give you a map of the command line options, like for instance boost::program_options::variables_map ( tutorial ).
I other words, I prefer args_info.iterations_arg to vm["iterations"].as<int>()
User tsug303 suggested the library TCLAP. It looks quite nice. It would fit my needs to divide the options into groups so that I could reuse code when multiple programs share some common options. Although it doesn't generate out the source code from a configuration file format in XML, I almost marked that answer as the accepted answer.
But none of the suggested libraries fullfilled all of my requirements so I started thinking about writing my own library. A sketch: A new tool that would take as input a custom XML format and that would generate both C++ code and an XML schema. Some other C++ code is generated from the XML schema with the tool CodeSynthesis XSD. The two chunks of C++ code are combined into a library. One extra benefit is that we get an XML Schema for the command line options and that we get a way to serialize all of them into a binary format (in CDR format generated from CodeSynthesis XSD). I will see if I get the time to write such a library. Better of course is to find a libraray that has already been implemented.
Today I read about user Nore's suggested alternative. It looks promising and I will be eager to try it out when the planned C++ code generation has been implemented. The suggestion from Nore looks to be the closest thing to what I have been looking for.
Maybe this TCLAP library would fit your needs ?
May I suggest you look at this project. It is something I am currently working on: A XSD Schema to describe command line arguments in XML. I made XSLT transformations to create bash and Python code, XUL frontend interface and HTML documentation.
Unfortunately, I do not generate C/C++ code yet (it is planed).
Edit: a first working version of the C parser is now available. Hope it helps
I will add yet another project called protoargs. It generates C++ argument parser code out of protobuf proto file, using cxxopts.
Unfortunately it does not satisfy all author needs. No documentation generated. no compile time computation. However someone may find it useful.
UPD: As mentioned in comments, I must specify that this is my own project
I'd like to create a new Gradle project without any sources. I'm going to put there some configuration files and I want to generate a zip file when I build.
With maven I'd use the assembly plugin. I'm looking for the easiest and lightest way to do this with Gradle. I wonder if I need to apply the java plugin even if I don't have any sources here, just because it provides some basic and useful tasks like clean, assemble and so on. Generating a zip is pretty straightforward, I know how to do that, but I don't know where and how to put the zip generation within the gradle world.
I've done it manually until now. In other words, for projects where all I want to do is create some kind of distro and I need the basic lifecycle tasks like assemble and clean, I've simply created those tasks along with the needed dependencies.
But there is the 'base' plugin (mentioned under "Base plugins" of the "Standard Gradle Plugins" in the user's guide) that seems to fit the bill nicely for this functionality. Note though that the user guide mentions that this and the other base plugins are not yet considered part of the Gradle API and are not really documented.
The results are pretty much identical to yours, the only difference being that there are no confusing java specific tasks that always remain UP-TO-DATE.
apply plugin: 'base'
task dist(type: Zip) {
from('solr')
into('solr')
}
assemble.dependsOn(dist)
Sample run:
$ gradle clean assemble
:clean
:dist
:assemble
BUILD SUCCESSFUL
Total time: 2.562 secs
As far as I understood, it might sound strange but looks like I need to apply the java plugin in order to create a zip file. Furthermore it's handy to have available some common tasks like for example clean. The following is my build.gradle:
apply plugin: 'java'
task('dist', type: Zip) {
from('solr')
into('solr')
}
assemble.dependsOn dist
I applied the java plugin and defined my dist task which creates a zip file containing a solr directory with the content of the solr directory within my project. The last line is handy to have the task executed when I run the common gradle build or gradle assemble, since I don't want to explicitly call the dist task.
This way if I work with multiple projects I just need to execute gradle build on the parent to generate all the artifacts, including the configuration zip.
Please let me know if you have better solutions and add your own answer!
You could just use the groovy plugin and use ant. I did something like this. I do also like javanna's answer.
task jars(dependsOn: ['dev_jars']) << {
def fromDir = file('/database-files/non_dev').listFiles().sort()
File dist = new File("${project.buildDir}/dist")
dist.mkdir()
fromDir.each { File dir ->
File destFile = new File("${dist.absolutePath}" + "/" + "database-connection-" + dir.name + ".jar")
println destFile.getAbsolutePath()
ant.jar(destfile:destFile, update:false, baseDir:dir)
}
}
I can easily do this with JQuery or PHP but I have a project for my Intro to C++ class and I thought it'll be pretty cool if I could mix C++ with some APIs like twitter, google, yahoo etc.
Could you tell me if there is a class ( I know OOP ) I can use to read an external XML or JSON file. The program has to run on windows and linux so I can't use commands.
Or, if this can't be done, what other cool project would you do? Thanks in advance.
XML: xerces(C++) http://xerces.apache.org/xerces-c/
JSON:http://sourceforge.net/projects/jsoncpp/