src/common/portio.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Portable i/o for binary files
 *
 * 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 <stdio.h>

#ifndef frexp
extern double  frexp();
#endif
#ifndef ldexp
extern double  ldexp();
#endif


void
putstr(s, fp)                   /* write null-terminated string to fp */
register char  *s;
register FILE  *fp;
{
        do
                putc(*s, fp);
        while (*s++);
}


void
putint(i, siz, fp)              /* write a siz-byte integer to fp */
long  i;
register int  siz;
register FILE  *fp;
{
        while (siz--)
                putc((int)(i>>(siz<<3) & 0xff), fp);
}


void
putflt(f, fp)                   /* put out floating point number */
double  f;
FILE  *fp;
{
        int  e;

        putint((long)(frexp(f,&e)*0x7fffffff), 4, fp);
        putint((long)e, 1, fp);
}


char *
getstr(s, fp)                   /* get null-terminated string */
char  *s;
register FILE  *fp;
{
        register char  *cp;
        register int  c;

        cp = s;
        while ((c = getc(fp)) != EOF)
                if ((*cp++ = c) == '\0')
                        return(s);
                
        return(NULL);
}


long
getint(siz, fp)                 /* get a siz-byte integer */
int  siz;
register FILE  *fp;
{
        register int  c;
        register long  r;

        if ((c = getc(fp)) == EOF)
                return(EOF);
        r = 0x80&c ? -1<<8|c : c;               /* sign extend */
        while (--siz > 0) {
                if ((c = getc(fp)) == EOF)
                        return(EOF);
                r <<= 8;
                r |= c;
        }
        return(r);
}


double
getflt(fp)                      /* get a floating point number */
FILE  *fp;
{
        long    l;
        double  d;

        l = getint(4, fp);
        d = (l + (l > 0 ? .5 : -.5)) * (1./0x7fffffff);
        return(ldexp(d, (int)getint(1, fp)));
}
Revision:	2.6
Committed:	Sat Feb 22 02:07:22 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.5:	+63 -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	* Portable i/o for binary files
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 <stdio.h>
68
69	#ifndef frexp
70	extern double frexp();
71	#endif
72	#ifndef ldexp
73	extern double ldexp();
74	#endif
75
76
77	void
78	putstr(s, fp) /* write null-terminated string to fp */
79	register char *s;
80	register FILE *fp;
81	{
82	do
83	putc(*s, fp);
84	while (*s++);
85	}
86
87
88	void
89	putint(i, siz, fp) /* write a siz-byte integer to fp */
90	long i;
91	register int siz;
92	register FILE *fp;
93	{
94	while (siz--)
95	putc((int)(i>>(siz<<3) & 0xff), fp);
96	}
97
98
99	void
100	putflt(f, fp) /* put out floating point number */
101	double f;
102	FILE *fp;
103	{
104	int e;
105
106	putint((long)(frexp(f,&e)*0x7fffffff), 4, fp);
107	putint((long)e, 1, fp);
108	}
109
110
111	char *
112	getstr(s, fp) /* get null-terminated string */
113	char *s;
114	register FILE *fp;
115	{
116	register char *cp;
117	register int c;
118
119	cp = s;
120	while ((c = getc(fp)) != EOF)
121	if ((*cp++ = c) == '\0')
122	return(s);
123
124	return(NULL);
125	}
126
127
128	long
129	getint(siz, fp) /* get a siz-byte integer */
130	int siz;
131	register FILE *fp;
132	{
133	register int c;
134	register long r;
135
136	if ((c = getc(fp)) == EOF)
137	return(EOF);
138	r = 0x80&c ? -1<<8\|c : c; /* sign extend */
139	while (--siz > 0) {
140	if ((c = getc(fp)) == EOF)
141	return(EOF);
142	r <<= 8;
143	r \|= c;
144	}
145	return(r);
146	}
147
148
149	double
150	getflt(fp) /* get a floating point number */
151	FILE *fp;
152	{
153	long l;
154	double d;
155
156	l = getint(4, fp);
157	d = (l + (l > 0 ? .5 : -.5)) * (1./0x7fffffff);
158	return(ldexp(d, (int)getint(1, fp)));
159	}