dav/optparser.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2015 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "optparser.h"

void cmd_args_free(CmdArgs *args) {
    ucx_map_free(args->options);
    free(args->argv);
    free(args);
}

CmdArgs* cmd_parse_args(int argc, char **argv) {
    CmdArgs *a = malloc(sizeof(CmdArgs));
    a->options = ucx_map_new(16);
    a->argv = calloc(argc, sizeof(char*));
    a->argc = 0;
    
    const char *NOARG = "";
    
    char *option = NULL;
    char optchar = 0;
    for(int i=0;i<argc;i++) {
        char *arg = argv[i];
        size_t len = strlen(arg);
        if(len > 1 && arg[0] == '-') {
            for(int c=1;c<len;c++) {
                switch(arg[c]) {
                    default: {
                        fprintf(stderr, "Unknown option -%c", arg[c]);
                        cmd_args_free(a);
                        return NULL;
                    }
                    case 'v': {
                        ucx_map_cstr_put(a->options, "verbose", NOARG);
                        break;
                    }
                    case 'k': {
                        if(!option) {
                            option = "key";
                            optchar = 'k';
                        } else {
                            fprintf(
                                    stderr,
                                    "Missing argument for option -%c\n",
                                    optchar);
                            cmd_args_free(a);
                            return NULL;
                        }
                        break;
                    }
                    case 'p': {
                        ucx_map_cstr_put(a->options, "plain", NOARG);
                        break;
                    }
                    case 'c': {
                        ucx_map_cstr_put(a->options, "crypt", NOARG);
                        break;
                    }
                    case 'a': {
                        ucx_map_cstr_put(a->options, "all", NOARG);
                        break;
                    }
                    case 'l': {
                        ucx_map_cstr_put(a->options, "list", NOARG);
                        break;
                    }
                    case 't': {
                        ucx_map_cstr_put(a->options, "type", NOARG);
                        break;
                    }
                    case 'R': {
                        ucx_map_cstr_put(a->options, "recursive", NOARG);
                        break;
                    }
                    case 'o': {
                        if(!option) {
                            option = "output";
                            optchar = 'o';
                        } else {
                            fprintf(
                                    stderr,
                                    "Missing argument for option -%c\n",
                                    optchar);
                            cmd_args_free(a);
                            return NULL;
                        }
                        break;
                    }
                    case 'u': {
                        if(!option) {
                            option = "update";
                            optchar = 'u';
                        } else {
                            fprintf(
                                    stderr,
                                    "Missing argument for option -%c\n",
                                    optchar);
                            cmd_args_free(a);
                            return NULL;
                        }
                        break;
                    }
                    case 'n': {
                        if(!option) {
                            option = "namespace";
                            optchar = 'n';
                        } else {
                            fprintf(
                                    stderr,
                                    "Missing argument for option -%c\n",
                                    optchar);
                            cmd_args_free(a);
                            return NULL;
                        }
                        break;
                    }
                }
            }
        } else if(option) {
            ucx_map_cstr_put(a->options, option, arg);
            option = NULL;
        } else {
            a->argv[a->argc++] = arg;
        }
    }
    
    return a;
}

char* cmd_getoption(CmdArgs *arg, char *name) {
    return ucx_map_cstr_get(arg->options, name);
}