c-cpp-tool

Some useful c/cpp classes

ArgvProcessor

What's this:

A class which helps handle command line parameters.

Introduce:

ArgvProcessor class requires a guide_map list created from user. Accroding to this guide_map, the class can handle the command line parameters.

guide_map Format:

std::map<const char *, std::pair<bool (*)(const char *), int>>

The first item of std::map is a full-matching word. We suggest adding "-" at the beginning. for example "-ignore". Word "BIN" has been specifically defined for the executable file name(argv[0]). The first item of std::pair is a functor pointer that tells the Processor what to do after matcing the word. The second item of std::pair shows the number of parameters the Processor should take. If n < 0, then means the number is unknown.

Also, you can use argvmap_t instead:

typedef std::map<const char *, std::pair<bool (*)(const char *), int>> argvmap_t;

example:

argvmap_t argv_guide = {{BIN, {bin, 1}},
                       {"-hello", {hello, -1}},
                       {"-world", {world, 2}}};

bool bin(const char *x)
{
    printf("BIN %s\n", x);
    return true;
}

use:

int ArgvProcessor::process(const char **const argv);

return type:

ARGV_UNPROCESSED : no parameter found.
#define ARGV_ERROR_RUNTIME : parameter Error when calling function.
#define ARGV_UNKNOWN_PARAMETER : unknown parameter.
#define ARGV_SUCCESS : successful.