trunk/src/getopt.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  getopt.c: Uses getopt to fetch the command line options.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "stdinc.h"
#include "ircd_getopt.h"

#define OPTCHAR '-'


static void
usage(const char *name, const struct lgetopt *opts)
{
  unsigned int i;

  fprintf(stderr, "Usage: %s [options]\n", name);
  fprintf(stderr, "Where valid options are:\n");

  for (i = 0; opts[i].opt; ++i)
    fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR, opts[i].opt,
            (opts[i].argtype == YESNO || opts[i].argtype == USAGE) ? "" :
            opts[i].argtype == INTEGER ? "<number>" : "<string>",
            opts[i].desc);

  exit(EXIT_FAILURE);
}

void
parseargs(int *argc, char ***argv, struct lgetopt *opts)
{
  unsigned int i;
  const char *progname = (*argv)[0];

  /* loop through each argument */
  while (1)
  {
    int found = 0;

    (*argc)--;
    (*argv)++;

    if (*argc < 1 || (*argv)[0][0] != OPTCHAR)
      return;

    (*argv)[0]++;

    /* search through our argument list, and see if it matches */
    for (i = 0; opts[i].opt; i++) 
    {
      if (!strcmp(opts[i].opt, (*argv)[0]))
      {
        /* found our argument */
        found = 1;

        switch (opts[i].argtype)
        {
          case YESNO:
            *((int *)opts[i].argloc) = 1;
            break;

          case INTEGER:
            if (*argc < 2)
            {
              fprintf(stderr, "Error: option '%c%s' requires an argument\n",
                      OPTCHAR, opts[i].opt);
              usage((*argv)[0], opts);
            }
                  
            *((int *)opts[i].argloc) = atoi((*argv)[1]);
            (*argc)--;
            (*argv)++;
            break;

          case STRING:
            if (*argc < 2)
            {
              fprintf(stderr, "error: option '%c%s' requires an argument\n",
                      OPTCHAR, opts[i].opt);
              usage(progname, opts);
            }

            *((char**)opts[i].argloc) = malloc(strlen((*argv)[1]) + 1);
            strcpy(*((char**)opts[i].argloc), (*argv)[1]);
            (*argc)--;
            (*argv)++;
            break;

          case USAGE:
            usage(progname, opts);
            /* NOTREACHED */

          default:
            fprintf(stderr, "Error: internal error in parseargs() at %s:%d\n",
                    __FILE__, __LINE__);
            exit(EXIT_FAILURE);
        }
      }
    }

    if (!found)
    {
      fprintf(stderr, "error: unknown argument '%c%s'\n",
              OPTCHAR, (*argv)[0]);
      usage(progname, opts);
    }
  }
}
Revision:	1592
Committed:	Sat Oct 27 21:02:32 2012 UTC (12 years, 10 months ago) by michael
Content type:	text/x-csrc
File size:	3377 byte(s)
Log Message:	- Second time's the charm? Moving svnroot/ircd-hybrid-8 to svnroot/ircd-hybrid/trunk
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* getopt.c: Uses getopt to fetch the command line options.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "ircd_getopt.h"
27
28			#define OPTCHAR '-'
29
30
31	michael	1357	static void
32			usage(const char name, const struct lgetopt opts)
33			{
34			unsigned int i;
35
36			fprintf(stderr, "Usage: %s [options]\n", name);
37			fprintf(stderr, "Where valid options are:\n");
38
39			for (i = 0; opts[i].opt; ++i)
40			fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR, opts[i].opt,
41			(opts[i].argtype == YESNO \|\| opts[i].argtype == USAGE) ? "" :
42			opts[i].argtype == INTEGER ? "<number>" : "<string>",
43			opts[i].desc);
44
45			exit(EXIT_FAILURE);
46			}
47
48	adx	30	void
49			parseargs(int argc, char *argv, struct lgetopt opts)
50			{
51	michael	1357	unsigned int i;
52			const char progname = (argv)[0];
53	adx	30
54			/* loop through each argument */
55	michael	1357	while (1)
56			{
57			int found = 0;
58
59			(*argc)--;
60			(*argv)++;
61
62			if (argc < 1 \|\| (argv)[0][0] != OPTCHAR)
63			return;
64
65			(*argv)[0]++;
66
67			/* search through our argument list, and see if it matches */
68			for (i = 0; opts[i].opt; i++)
69	adx	30	{
70	michael	1357	if (!strcmp(opts[i].opt, (*argv)[0]))
71			{
72			/* found our argument */
73			found = 1;
74	adx	30
75	michael	1357	switch (opts[i].argtype)
76			{
77			case YESNO:
78			((int )opts[i].argloc) = 1;
79			break;
80	adx	30
81	michael	1357	case INTEGER:
82			if (*argc < 2)
83			{
84			fprintf(stderr, "Error: option '%c%s' requires an argument\n",
85			OPTCHAR, opts[i].opt);
86			usage((*argv)[0], opts);
87			}
88	adx	30
89	michael	1357	((int )opts[i].argloc) = atoi((*argv)[1]);
90	michael	755	(*argc)--;
91			(*argv)++;
92	michael	1357	break;
93
94			case STRING:
95			if (*argc < 2)
96			{
97			fprintf(stderr, "error: option '%c%s' requires an argument\n",
98			OPTCHAR, opts[i].opt);
99			usage(progname, opts);
100			}
101
102			((char)opts[i].argloc) = malloc(strlen((argv)[1]) + 1);
103			strcpy(((char)opts[i].argloc), (argv)[1]);
104	michael	755	(*argc)--;
105			(*argv)++;
106	michael	1357	break;
107	adx	30
108	michael	1357	case USAGE:
109			usage(progname, opts);
110			/* NOTREACHED */
111	adx	30
112	michael	1357	default:
113			fprintf(stderr, "Error: internal error in parseargs() at %s:%d\n",
114			__FILE__, __LINE__);
115			exit(EXIT_FAILURE);
116			}
117			}
118	adx	30	}
119
120	michael	1357	if (!found)
121			{
122			fprintf(stderr, "error: unknown argument '%c%s'\n",
123			OPTCHAR, (*argv)[0]);
124			usage(progname, opts);
125			}
126	adx	30	}
127			}