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);

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

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

      (*argc)--;
      (*argv)++;
      
      if (*argc < 1)
        {
          return;
        }
      
      /* check if it *is* an arg.. */
      if ((*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]);
                    }
                  
                  *((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);
                    }
                  
                  *((char**)opts[i].argloc) = malloc(strlen((*argv)[1]) + 1);
                  strcpy(*((char**)opts[i].argloc), (*argv)[1]);
            (*argc)--;
            (*argv)++;
                  break;

                case USAGE:
                  usage(progname);
                  /*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);
          }
    }
}

static void 
usage(const char *name)
{
  int i;
  
  fprintf(stderr, "Usage: %s [options]\n", name);
  fprintf(stderr, "Where valid options are:\n");
  
  for (i = 0; myopts[i].opt; i++)
  {
    fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR, myopts[i].opt, 
            (myopts[i].argtype == YESNO || myopts[i].argtype == USAGE) ? "" : 
            myopts[i].argtype == INTEGER ? "<number>" : "<string>",
            myopts[i].desc);
  }

  exit(EXIT_FAILURE);
}

Revision:	1156
Committed:	Tue Aug 9 20:29:20 2011 UTC (14 years ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/getopt.c*
File size:	3187 byte(s)
Log Message:	- create ircd-hybrid-8 "branch"
#	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			static void usage(const char *name);
31
32			void
33			parseargs(int argc, char *argv, struct lgetopt opts)
34			{
35			int i;
36			char progname = (argv)[0];
37
38			/* loop through each argument */
39			for (;;)
40			{
41			int found = 0;
42
43			(*argc)--;
44			(*argv)++;
45
46			if (*argc < 1)
47			{
48			return;
49			}
50
51			/* check if it is an arg.. */
52			if ((*argv)[0][0] != OPTCHAR)
53			{
54			return;
55			}
56
57			(*argv)[0]++;
58
59			/* search through our argument list, and see if it matches */
60			for (i = 0; opts[i].opt; i++)
61			{
62			if (!strcmp(opts[i].opt, (*argv)[0]))
63			{
64			/* found our argument */
65			found = 1;
66
67			switch (opts[i].argtype)
68			{
69			case YESNO:
70			((int )opts[i].argloc) = 1;
71			break;
72			case INTEGER:
73			if (*argc < 2)
74			{
75			fprintf(stderr, "Error: option '%c%s' requires an argument\n",
76			OPTCHAR, opts[i].opt);
77			usage((*argv)[0]);
78			}
79
80			((int )opts[i].argloc) = atoi((*argv)[1]);
81	michael	755	(*argc)--;
82			(*argv)++;
83	adx	30	break;
84			case STRING:
85			if (*argc < 2)
86			{
87			fprintf(stderr, "error: option '%c%s' requires an argument\n",
88			OPTCHAR, opts[i].opt);
89			usage(progname);
90			}
91
92			((char)opts[i].argloc) = malloc(strlen((argv)[1]) + 1);
93			strcpy(((char)opts[i].argloc), (argv)[1]);
94	michael	755	(*argc)--;
95			(*argv)++;
96	adx	30	break;
97
98			case USAGE:
99			usage(progname);
100			/NOTREACHED/
101
102			default:
103			fprintf(stderr, "Error: internal error in parseargs() at %s:%d\n",
104			__FILE__, __LINE__);
105			exit(EXIT_FAILURE);
106			}
107			}
108			}
109			if (!found)
110			{
111			fprintf(stderr, "error: unknown argument '%c%s'\n", OPTCHAR, (*argv)[0]);
112			usage(progname);
113			}
114			}
115			}
116
117			static void
118			usage(const char *name)
119			{
120			int i;
121
122			fprintf(stderr, "Usage: %s [options]\n", name);
123			fprintf(stderr, "Where valid options are:\n");
124
125			for (i = 0; myopts[i].opt; i++)
126			{
127			fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR, myopts[i].opt,
128			(myopts[i].argtype == YESNO \|\| myopts[i].argtype == USAGE) ? "" :
129			myopts[i].argtype == INTEGER ? "<number>" : "<string>",
130			myopts[i].desc);
131			}
132
133			exit(EXIT_FAILURE);
134			}
135