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 |
} |