libcargs - command line argument library for C/C++

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Example

staticstructcag_optionoptions[]= {{.identifier='s',   .access_letters="s",   .access_name=NULL,   .value_name=NULL,   .description="Simple flag"}, {.identifier='m',   .access_letters="mMoO",   .access_name=NULL,   .value_name=NULL,   .description="Multiple access letters"}, {.identifier='l',   .access_letters=NULL,   .access_name="long",   .value_name=NULL,   .description="Long parameter name"}, {.identifier='k',   .access_letters="k",   .access_name="key",   .value_name="VALUE",   .description="Parameter value"}, {.identifier='h',   .access_letters="h",   .access_name="help",   .description="Shows the command help"}};

intmain(intargc,char*argv[]){boolsimple_flag= false,multiple_flag= false,long_flag= false;constchar*value=NULL;intparam_index;cag_option_contextcontext;cag_option_init(&context,options,CAG_ARRAY_SIZE(options),argc,argv);while (cag_option_fetch(&context)) {switch (cag_option_get_identifier(&context)) {case's':simple_flag= true;break;case'm':multiple_flag= true;break;case'l':long_flag= true;break;case'k':value=cag_option_get_value(&context);break;case'h':printf("Usage: cargsdemo [OPTION]...\n");printf("Demonstrates the cargs library.\n\n");cag_option_print(options,CAG_ARRAY_SIZE(options),stdout);returnEXIT_SUCCESS;case'?':cag_option_print_error(&context,stdout);break;    }  }printf("simple_flag: %i, multiple_flag: %i, long_flag: %i, key: %s\n",simple_flag,multiple_flag,long_flag,value ?value :"-");returnEXIT_SUCCESS;}

Example output

foo@bar:~$./cargsdemosimple_flag: 0, multiple_flag: 0, long_flag: 0, key: -

foo@bar:~$./cargsdemo -k=test -sm --longsimple_flag: 1, multiple_flag: 1, long_flag: 1, key: test

foo@bar:~$./cargsdemo --helpUsage: cargsdemo [OPTION]...Demonstrates the cargs library.  -s                   Simple flag  -m, -M, -o, -O       Multiple access letters  --long               Long parameter name  -k, --key=VALUE      Parameter value  -h, --help           Shows the command help

Example code