358e048a00
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2634 ec53bebd-3082-4978-b11e-865c3cabbd6b
325 lines
7.9 KiB
C
325 lines
7.9 KiB
C
/*
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* Copyright (c) 1997 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* Högskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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RCSID("$Id$");
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#endif
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#include <stdio.h>
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#include <roken.h>
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#include "getarg.h"
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static size_t
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print_arg (int longp, struct getargs *arg)
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{
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const char *s;
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if (arg->type == arg_flag || arg->type == arg_negative_flag)
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return 0;
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if (longp)
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putc ('=', stderr);
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else
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putc (' ', stderr);
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if (arg->arg_help)
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s = arg->arg_help;
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else if (arg->type == arg_integer)
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s = "number";
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else if (arg->type == arg_string)
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s = "string";
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fprintf (stderr, "%s", s);
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return 1 + strlen(s);
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}
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void
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arg_printusage (struct getargs *args,
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size_t num_args,
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const char *extra_string)
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{
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int i;
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size_t max_len = 0;
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fprintf (stderr, "Usage: %s", __progname);
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for (i = 0; i < num_args; ++i) {
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size_t len = 0;
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if (args[i].long_name) {
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fprintf (stderr, " [--");
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if (args[i].type == arg_negative_flag) {
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fprintf (stderr, "no-");
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len += 3;
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}
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fprintf (stderr, "%s", args[i].long_name);
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len += 2 + strlen(args[i].long_name);
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len += print_arg (1, &args[i]);
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putc (']', stderr);
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}
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if (args[i].short_name) {
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len += 2;
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fprintf (stderr, " [-%c", args[i].short_name);
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len += print_arg (0, &args[i]);
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putc (']', stderr);
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}
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if (args[i].long_name && args[i].short_name)
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len += 4;
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max_len = max(max_len, len);
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}
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if (extra_string)
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fprintf (stderr, " %s\n", extra_string);
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else
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fprintf (stderr, "\n");
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for (i = 0; i < num_args; ++i) {
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if (args[i].help) {
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size_t count = 0;
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if (args[i].short_name) {
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fprintf (stderr, "-%c", args[i].short_name);
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count += 2;
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count += print_arg (0, &args[i]);
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}
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if (args[i].short_name && args[i].long_name) {
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fprintf (stderr, " or ");
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count += 4;
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}
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if (args[i].long_name) {
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fprintf (stderr, "--");
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if (args[i].type == arg_negative_flag) {
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fprintf (stderr, "no-");
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count += 3;
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}
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fprintf (stderr, "%s", args[i].long_name);
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count += 2 + strlen(args[i].long_name);
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count += print_arg (1, &args[i]);
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}
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while(count++ <= max_len)
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putc (' ', stderr);
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fprintf (stderr, "%s\n", args[i].help);
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}
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}
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}
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static int
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arg_match_long(struct getargs *args, size_t num_args,
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char *argv)
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{
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int i;
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char *optarg;
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int negate;
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int partial_match = 0;
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struct getargs *partial = NULL;
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struct getargs *current = NULL;
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int argv_len;
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char *p;
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argv_len = strlen(argv);
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p = strchr (argv, '=');
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if (p != NULL)
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argv_len = p - argv;
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for (i = 0; i < num_args; ++i) {
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if(args[i].long_name) {
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int len = strlen(args[i].long_name);
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char *p = argv;
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int p_len = argv_len;
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negate = 0;
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for (;;) {
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if (strncmp (args[i].long_name, p, len) == 0) {
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current = &args[i];
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optarg = p + len;
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} else if (strncmp (args[i].long_name,
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p,
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p_len) == 0) {
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++partial_match;
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partial = &args[i];
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optarg = p + p_len;
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} else if (args[i].type == arg_flag
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&& strncmp (p, "no-", 3) == 0) {
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negate = !negate;
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p += 3;
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p_len -= 3;
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continue;
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}
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break;
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}
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if (current)
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break;
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}
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}
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if (current == NULL)
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if (partial_match == 1)
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current = partial;
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else
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return ARG_ERR_NO_MATCH;
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if(*optarg != '=' && (current->type != arg_flag && *optarg == 0))
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return ARG_ERR_NO_MATCH;
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switch(current->type){
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case arg_integer:
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{
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int tmp;
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if(sscanf(optarg + 1, "%d", &tmp) != 1)
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return ARG_ERR_BAD_ARG;
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*(int*)current->value = tmp;
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return 0;
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}
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case arg_string:
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{
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*(char**)current->value = optarg + 1;
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return 0;
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}
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case arg_flag:
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{
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int *flag = current->value;
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if(*optarg == 0 ||
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strcmp(optarg + 1, "yes") == 0 ||
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strcmp(optarg + 1, "true") == 0){
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*flag = !negate;
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return 0;
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} else if (*optarg && strcmp(optarg + 1, "maybe") == 0) {
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*flag = rand() & 1;
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} else {
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*flag = negate;
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return 0;
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}
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return ARG_ERR_BAD_ARG;
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}
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default:
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abort ();
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}
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}
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int
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getarg(struct getargs *args, size_t num_args,
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int argc, char **argv, int *optind)
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{
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int i, j, k;
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int ret = 0;
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srand (time(NULL));
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(*optind)++;
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for(i = *optind; i < argc; i++) {
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if(argv[i][0] != '-')
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break;
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if(argv[i][1] == '-'){
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if(argv[i][2] == 0){
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i++;
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break;
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}
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ret = arg_match_long (args, num_args, argv[i] + 2);
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if(ret)
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return ret;
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}else{
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for(j = 1; argv[i][j]; j++) {
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for(k = 0; k < num_args; k++) {
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char *optarg;
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if(args[k].short_name == 0)
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continue;
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if(argv[i][j] == args[k].short_name){
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if(args[k].type == arg_flag){
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*(int*)args[k].value = 1;
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break;
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}
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if(args[k].type == arg_negative_flag){
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*(int*)args[k].value = 0;
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break;
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}
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if(argv[i][j + 1])
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optarg = &argv[i][j + 1];
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else{
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i++;
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optarg = argv[i];
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}
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if(optarg == NULL)
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return ARG_ERR_NO_ARG;
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if(args[k].type == arg_integer){
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int tmp;
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if(sscanf(optarg, "%d", &tmp) != 1)
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return ARG_ERR_BAD_ARG;
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*(int*)args[k].value = tmp;
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goto out;
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}else if(args[k].type == arg_string){
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*(char**)args[k].value = optarg;
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goto out;
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}
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return ARG_ERR_BAD_ARG;
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}
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}
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if (k == num_args)
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return ARG_ERR_NO_MATCH;
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}
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out:
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}
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}
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*optind = i;
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return 0;
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}
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#if TEST
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int foo_flag = 2;
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int flag1 = 0;
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int flag2 = 0;
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int bar_int;
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char *baz_string;
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struct getargs args[] = {
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{ NULL, '1', arg_flag, &flag1, "one", NULL },
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{ NULL, '2', arg_flag, &flag2, "two", NULL },
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{ "foo", 'f', arg_negative_flag, &foo_flag, "foo", NULL },
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{ "bar", 'b', arg_integer, &bar_int, "bar", "seconds"},
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{ "baz", 'x', arg_string, &baz_string, "baz", "name" },
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};
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int main(int argc, char **argv)
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{
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int optind = 0;
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while(getarg(args, 5, argc, argv, &optind))
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printf("Bad arg: %s\n", argv[optind]);
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printf("flag1 = %d\n", flag1);
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printf("flag2 = %d\n", flag2);
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printf("foo_flag = %d\n", foo_flag);
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printf("bar_int = %d\n", bar_int);
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printf("baz_flag = %s\n", baz_string);
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arg_printusage (args, 5, "nothing here");
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}
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#endif
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