src/common/expandarg.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Get additional command arguments from file or environment.
 *
 *  External symbols declared in standard.h
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   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.
 *
 * 3. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 Lawrence Berkeley National Laboratory OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */

#include "standard.h"

#define MAXARGEXP       512             /* maximum argument expansion */

                        /* set the following to suit, -1 to disable */
int     envexpchr = '$';                /* environment expansion character */
int     filexpchr = '@';                /* file expansion character */


int
expandarg(acp, avp, n)          /* expand list at argument n */
int     *acp;
register char   ***avp;
int     n;
{
        int     ace;
        char    *ave[MAXARGEXP];
        char    **newav;
                                        /* check argument */
        if (n >= *acp)
                return(0);
        errno = 0;      
        if ((*avp)[n][0] == filexpchr) {                /* file name */
                ace = wordfile(ave, (*avp)[n]+1);
                if (ace < 0)
                        return(-1);     /* no such file */
        } else if ((*avp)[n][0] == envexpchr) {         /* env. variable */
                ace = wordstring(ave, getenv((*avp)[n]+1));
                if (ace < 0)
                        return(-1);     /* no such variable */
        } else                                          /* regular argument */
                return(0);
                                        /* allocate new pointer list */
        newav = (char **)bmalloc((*acp+ace)*sizeof(char *));
        if (newav == NULL)
                return(-1);
                                        /* copy preceeding arguments */
        bcopy((char *)*avp, (char *)newav, n*sizeof(char *));
                                        /* copy expanded argument */
        bcopy((char *)ave, (char *)(newav+n), ace*sizeof(char *));
                                        /* copy trailing arguments + NULL */
        bcopy((char *)(*avp+n+1), (char *)(newav+n+ace), (*acp-n)*sizeof(char *));
                                        /* free old list */
        bfree((char *)*avp, (*acp+1)*sizeof(char *));
                                        /* assign new list */
        *acp += ace-1;
        *avp = newav;
        return(1);                      /* return success */
}
Revision:	2.4
Committed:	Sat Feb 22 02:07:22 2003 UTC (22 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+61 -4 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* Get additional command arguments from file or environment.
6	*
7	* External symbols declared in standard.h
8	*/
9
10	/* ====================================================================
11	* The Radiance Software License, Version 1.0
12	*
13	* Copyright (c) 1990 - 2002 The Regents of the University of California,
14	* through Lawrence Berkeley National Laboratory. All rights reserved.
15	*
16	* Redistribution and use in source and binary forms, with or without
17	* modification, are permitted provided that the following conditions
18	* are met:
19	*
20	* 1. Redistributions of source code must retain the above copyright
21	* notice, this list of conditions and the following disclaimer.
22	*
23	* 2. Redistributions in binary form must reproduce the above copyright
24	* notice, this list of conditions and the following disclaimer in
25	* the documentation and/or other materials provided with the
26	* distribution.
27	*
28	* 3. The end-user documentation included with the redistribution,
29	* if any, must include the following acknowledgment:
30	* "This product includes Radiance software
31	* (http://radsite.lbl.gov/)
32	* developed by the Lawrence Berkeley National Laboratory
33	* (http://www.lbl.gov/)."
34	* Alternately, this acknowledgment may appear in the software itself,
35	* if and wherever such third-party acknowledgments normally appear.
36	*
37	* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
38	* and "The Regents of the University of California" must
39	* not be used to endorse or promote products derived from this
40	* software without prior written permission. For written
41	* permission, please contact [email protected].
42	*
43	* 5. Products derived from this software may not be called "Radiance",
44	* nor may "Radiance" appear in their name, without prior written
45	* permission of Lawrence Berkeley National Laboratory.
46	*
47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
48	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
50	* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
51	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
54	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
55	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
56	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
57	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58	* SUCH DAMAGE.
59	* ====================================================================
60	*
61	* This software consists of voluntary contributions made by many
62	* individuals on behalf of Lawrence Berkeley National Laboratory. For more
63	* information on Lawrence Berkeley National Laboratory, please see
64	* <http://www.lbl.gov/>.
65	*/
66
67	#include "standard.h"
68
69	#define MAXARGEXP 512 /* maximum argument expansion */
70
71	/* set the following to suit, -1 to disable */
72	int envexpchr = '$'; /* environment expansion character */
73	int filexpchr = '@'; /* file expansion character */
74
75
76	int
77	expandarg(acp, avp, n) /* expand list at argument n */
78	int *acp;
79	register char ***avp;
80	int n;
81	{
82	int ace;
83	char *ave[MAXARGEXP];
84	char **newav;
85	/* check argument */
86	if (n >= *acp)
87	return(0);
88	errno = 0;
89	if ((avp)[n][0] == filexpchr) { / file name */
90	ace = wordfile(ave, (*avp)[n]+1);
91	if (ace < 0)
92	return(-1); /* no such file */
93	} else if ((avp)[n][0] == envexpchr) { / env. variable */
94	ace = wordstring(ave, getenv((*avp)[n]+1));
95	if (ace < 0)
96	return(-1); /* no such variable */
97	} else /* regular argument */
98	return(0);
99	/* allocate new pointer list */
100	newav = (char *)bmalloc((acp+ace)sizeof(char ));
101	if (newav == NULL)
102	return(-1);
103	/* copy preceeding arguments */
104	bcopy((char )avp, (char )newav, nsizeof(char *));
105	/* copy expanded argument */
106	bcopy((char )ave, (char )(newav+n), acesizeof(char ));
107	/* copy trailing arguments + NULL */
108	bcopy((char )(avp+n+1), (char )(newav+n+ace), (acp-n)sizeof(char ));
109	/* free old list */
110	bfree((char )avp, (acp+1)sizeof(char *));
111	/* assign new list */
112	*acp += ace-1;
113	*avp = newav;
114	return(1); /* return success */
115	}