This library provides a small class to parse option strings and allows you to get these into variables. Options strings can be in the form of h=12 b=100.0 etc. This is usefull if you want to send your device simple messages over MQTT and act on them accordingly instead of using sometimes inconvenient JSON messages.

uint32_t x;
float y;
float z;
OptParser::get("x=12 y=15.5 z=-23", [&x,&y,&z](OptValue f) {
        if (std::strcmp( f.key(), "x" ) == 0) {
            x = f;
        }
        if (std::strcmp( f.key(), "y" ) == 0) {
            y = f;
        }
        if (std::strcmp( f.key(), "z" ) == 0) {
            z = f;
        }
    });

More Examples of usage can be found in the ´tests/src/test_optparser.hpp´ directory and should be fairly straight forward.

Notice that this string is modified by being broken into smaller chunks if passed as a char array.

You can also use the stack version that does not corrupt the buffer.

    int calls = 0;
    char testCase[]="0.1,100.124,-100.678,-100,200,true";
    OptParser::get<64>(testCase, ',', [&calls](OptValue f) {        
            calls++;
    });
    REQUIRE_THAT((const char*)testCase, Equals("0.1,100.124,-100.678,-100,200,true"));
    REQUIRE(calls == 6);

Since v2.0.0 we do support implicit return types and the following types are supported:

• char*
• float
• long
• char
• int16_t
• int32_t
• bool

I want to implement a more convenicent method, something like this:

OptParser::get("x=12 y=15.5 z=-23", { {"x", &x, intType}, {"y", &y, floatType}, {"z", &z, floatType} });

But didn´t had time yet..

This code is released under the MIT License.