src/common/portio.c

#ifndef lint
static const char       RCSid[] = "$Id: portio.c,v 2.9 2003/11/13 16:42:17 greg Exp $";
#endif
/*
 * Portable i/o for binary files
 *
 * External symbols declared in standard.h
 */

#include "copyright.h"

#include <stdio.h>

#include "rtio.h"

#include <math.h>

#ifdef getc_unlocked            /* avoid horrendous overhead of flockfile */
#define getc    getc_unlocked
#define putc    putc_unlocked
#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:	2.10
Committed:	Tue Dec 9 15:51:42 2003 UTC (20 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.9:	+6 -1 lines
Log Message:	Added redirection for getc() and putc() on threaded C library
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	greg	2.10	static const char RCSid[] = "$Id: portio.c,v 2.9 2003/11/13 16:42:17 greg Exp $";
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	greg	2.7	#include "copyright.h"
11	greg	2.1
12			#include <stdio.h>
13	schorsch	2.8
14			#include "rtio.h"
15	greg	2.1
16	greg	2.9	#include <math.h>
17	greg	2.10
18			#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */
19			#define getc getc_unlocked
20			#define putc putc_unlocked
21			#endif
22	greg	2.1
23	greg	2.3
24	greg	2.6	void
25	greg	2.1	putstr(s, fp) /* write null-terminated string to fp */
26			register char *s;
27			register FILE *fp;
28			{
29			do
30			putc(*s, fp);
31			while (*s++);
32			}
33
34
35	greg	2.6	void
36	greg	2.1	putint(i, siz, fp) /* write a siz-byte integer to fp */
37			long i;
38			register int siz;
39			register FILE *fp;
40			{
41			while (siz--)
42	greg	2.2	putc((int)(i>>(siz<<3) & 0xff), fp);
43	greg	2.1	}
44
45
46	greg	2.6	void
47	greg	2.1	putflt(f, fp) /* put out floating point number */
48	greg	2.2	double f;
49			FILE *fp;
50	greg	2.1	{
51			int e;
52
53			putint((long)(frexp(f,&e)*0x7fffffff), 4, fp);
54			putint((long)e, 1, fp);
55			}
56
57
58			char *
59			getstr(s, fp) /* get null-terminated string */
60			char *s;
61			register FILE *fp;
62			{
63			register char *cp;
64			register int c;
65
66			cp = s;
67			while ((c = getc(fp)) != EOF)
68			if ((*cp++ = c) == '\0')
69			return(s);
70
71			return(NULL);
72			}
73
74
75			long
76			getint(siz, fp) /* get a siz-byte integer */
77			int siz;
78			register FILE *fp;
79			{
80			register int c;
81			register long r;
82
83			if ((c = getc(fp)) == EOF)
84			return(EOF);
85			r = 0x80&c ? -1<<8\|c : c; /* sign extend */
86			while (--siz > 0) {
87			if ((c = getc(fp)) == EOF)
88			return(EOF);
89			r <<= 8;
90			r \|= c;
91			}
92			return(r);
93			}
94
95
96			double
97			getflt(fp) /* get a floating point number */
98			FILE *fp;
99			{
100	greg	2.5	long l;
101	greg	2.2	double d;
102	greg	2.1
103	greg	2.5	l = getint(4, fp);
104			d = (l + (l > 0 ? .5 : -.5)) * (1./0x7fffffff);
105	greg	2.1	return(ldexp(d, (int)getint(1, fp)));
106			}