| 1 |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Read white space separated words from stream |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <stdio.h> |
| 12 |
|
| 13 |
#include <ctype.h> |
| 14 |
|
| 15 |
|
| 16 |
char * |
| 17 |
fgetword(s, n, fp) /* get a word, maximum n-1 characters */ |
| 18 |
char *s; |
| 19 |
int n; |
| 20 |
register FILE *fp; |
| 21 |
{ |
| 22 |
register char *cp; |
| 23 |
register int c; |
| 24 |
/* skip initial white space */ |
| 25 |
do |
| 26 |
c = getc(fp); |
| 27 |
while (isspace(c)); |
| 28 |
/* check for end of file */ |
| 29 |
if (c == EOF) |
| 30 |
return(NULL); |
| 31 |
/* get actual word */ |
| 32 |
cp = s; |
| 33 |
do { |
| 34 |
if (--n <= 0) /* check length limit */ |
| 35 |
break; |
| 36 |
*cp++ = c; |
| 37 |
c = getc(fp); |
| 38 |
} while (c != EOF && !isspace(c)); |
| 39 |
*cp = '\0'; |
| 40 |
if (c != EOF) /* replace delimiter */ |
| 41 |
ungetc(c, fp); |
| 42 |
return(s); |
| 43 |
} |
| 44 |
|
| 45 |
|
| 46 |
isint(s) /* check integer format */ |
| 47 |
char *s; |
| 48 |
{ |
| 49 |
register char *cp = s; |
| 50 |
|
| 51 |
while (isspace(*cp)) |
| 52 |
cp++; |
| 53 |
if (*cp == '-' || *cp == '+') |
| 54 |
cp++; |
| 55 |
do |
| 56 |
if (!isdigit(*cp)) |
| 57 |
return(0); |
| 58 |
while (*++cp); |
| 59 |
return(1); |
| 60 |
} |
| 61 |
|
| 62 |
|
| 63 |
isflt(s) /* check float format */ |
| 64 |
char *s; |
| 65 |
{ |
| 66 |
register char *cp = s; |
| 67 |
|
| 68 |
while (isspace(*cp)) |
| 69 |
cp++; |
| 70 |
if (*cp == '-' || *cp == '+') |
| 71 |
cp++; |
| 72 |
s = cp; |
| 73 |
while (isdigit(*cp)) |
| 74 |
cp++; |
| 75 |
if (*cp == '.') { |
| 76 |
cp++; s++; |
| 77 |
while (isdigit(*cp)) |
| 78 |
cp++; |
| 79 |
} |
| 80 |
if (cp == s) |
| 81 |
return(0); |
| 82 |
if (*cp == 'e' || *cp == 'E') |
| 83 |
return(isint(cp+1)); |
| 84 |
return(1); |
| 85 |
} |
