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 (22 years, 8 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
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.6	static const char RCSid[] = "$Id$";
3	greg	2.1	#endif
4			/*
5			* Portable i/o for binary files
6	greg	2.6	*
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	greg	2.1	*/
66
67			#include <stdio.h>
68
69	greg	2.3	#ifndef frexp
70			extern double frexp();
71			#endif
72			#ifndef ldexp
73			extern double ldexp();
74			#endif
75	greg	2.1
76	greg	2.3
77	greg	2.6	void
78	greg	2.1	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	greg	2.6	void
89	greg	2.1	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	greg	2.2	putc((int)(i>>(siz<<3) & 0xff), fp);
96	greg	2.1	}
97
98
99	greg	2.6	void
100	greg	2.1	putflt(f, fp) /* put out floating point number */
101	greg	2.2	double f;
102			FILE *fp;
103	greg	2.1	{
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	greg	2.5	long l;
154	greg	2.2	double d;
155	greg	2.1
156	greg	2.5	l = getint(4, fp);
157			d = (l + (l > 0 ? .5 : -.5)) * (1./0x7fffffff);
158	greg	2.1	return(ldexp(d, (int)getint(1, fp)));
159			}