dav/optparser.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2018 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"
#include "sopt.h"

#include <cx/hash_map.h>


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

static void cmd_map_put(CxMap *map, const char *key, const void *value) {
    cxMapPut(map, key, (void*)value);
}

CmdArgs* cmd_parse_args(int argc, char **argv) {
    CmdArgs *a = malloc(sizeof(CmdArgs));
    a->options = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
    a->argv = argc > 0 ? calloc(argc, sizeof(char*)) : NULL;
    a->argc = 0;
    
    const char *NOARG = "";
    
    char *option = NULL;
    char optchar = 0;
    int optterminated = 0;
    for(int i=0;i<argc;i++) {
        char *arg = argv[i];
        size_t len = strlen(arg);
        if(len == 2 && arg[0] == '-' && arg[1] == '-') {
            optterminated = 1;
        } else if(!optterminated && len > 1 && arg[0] == '-') {
            // argument is in next arg but starts with a dash
            // we assume this is not intended and consider this an error
            if(option) {
                fprintf(stderr,
                    "Missing argument for option -%c\n\n", optchar);
                cmd_args_free(a);
                return NULL;
            }
            for(int c=1;c<len;c++) {
                // argument is in the same arg
                if(option) {
                    cxMapPut(a->options, cx_hash_key_str(option), &arg[c]);
                    option = NULL;
                    break;
                }
                
                switch(arg[c]) {
                    default: {
                        fprintf(stderr, "Unknown option -%c\n\n", arg[c]);
                        cmd_args_free(a);
                        return NULL;
                    }
                    case 'v': {
                        cmd_map_put(a->options, "verbose", NOARG);
                        break;
                    }
                    case 'k': {
                        option = "key";
                        optchar = 'k';
                        break;
                    }
                    case 'p': {
                        cmd_map_put(a->options, "plain", NOARG);
                        break;
                    }
                    case 'c': {
                        cmd_map_put(a->options, "crypt", NOARG);
                        break;
                    }
                    case 'a': {
                        cmd_map_put(a->options, "all", NOARG);
                        break;
                    }
                    case 'l': {
                        cmd_map_put(a->options, "list", NOARG);
                        break;
                    }
                    case 'd': {
                        cmd_map_put(a->options, "date", NOARG);
                        break;
                    }
                    case 't': {
                        cmd_map_put(a->options, "type", NOARG);
                        break;
                    }
                    case 'R': {
                        cmd_map_put(a->options, "recursive", NOARG);
                        break;
                    }
                    case 'O': {
                        cmd_map_put(a->options, "override", NOARG);
                        break;
                    }
                    case 'i': {
                        cmd_map_put(a->options, "insecure", NOARG);
                        break;
                    }
                    case 'N': {
                        cmd_map_put(a->options, "noinput", NOARG);
                        break;
                    }
                    case 'e': {
                        cmd_map_put(a->options, "extended", NOARG);
                        break;
                    }
                    case 'x': {
                        cmd_map_put(a->options, "xml", NOARG);
                        break;
                    }
                    case 'F': {
                        option = "finfo";
                        optchar = 'F';
                        break;
                    }
                    case 'S': {
                        // undocumented hidden feature
                        cmd_map_put(a->options, "structure", NOARG);
                        break;
                    }
                    case 'K': {
                        cmd_map_put(a->options, "keep", NOARG);
                        break;
                    }
                    case 'o': {
                        option = "output";
                        optchar = 'o';
                        break;
                    }
                    case 'u': {
                        option = "update";
                        optchar = 'u';
                        break;
                    }
                    case 'n': {
                        option = "namespace";
                        optchar = 'n';
                        break;
                    }
                    case 'L': {
                        option = "lock";
                        optchar = 'L';
                        break;
                    }
                    case 'T': {
                        option = "timeout";
                        optchar = 'T';
                        break;
                    }
                    /*
                    case 'P': {
                        option = "progressfile";
                        optchar = 'F';
                        break;
                    }
                    */
                    case 'V': {
                        option = "version";
                        optchar = 'V';
                        break;
                    }
                }
            }
        } else if(option) {
            cmd_map_put(a->options, option, arg);
            option = NULL;
        } else {
            a->argv[a->argc++] = arg;
        }
    }
    if(option) {
        fprintf(stderr,
                "Missing argument for option -%c\n\n", optchar);
        cmd_args_free(a);
        return NULL;
    }
    
    return a;
}

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