| 4 |
|
/* |
| 5 |
|
* Read white space separated words from stream |
| 6 |
|
* |
| 7 |
< |
* External symbols declared in standard.h |
| 7 |
> |
* External symbols declared in rtio.h |
| 8 |
|
*/ |
| 9 |
|
|
| 10 |
|
#include "copyright.h" |
| 11 |
|
|
| 12 |
< |
#include <stdio.h> |
| 12 |
> |
#include "rtio.h" |
| 13 |
|
|
| 14 |
|
#include <ctype.h> |
| 15 |
|
|
| 16 |
|
|
| 17 |
+ |
#define isquote(c) (((c) == '"') | ((c) == '\'')) |
| 18 |
+ |
|
| 19 |
+ |
|
| 20 |
|
char * |
| 21 |
< |
fgetword(s, n, fp) /* get (quoted) word up to n-1 characters */ |
| 22 |
< |
char *s; |
| 23 |
< |
int n; |
| 24 |
< |
register FILE *fp; |
| 21 |
> |
fgetword( /* get (quoted) word up to n-1 characters */ |
| 22 |
> |
char *s, |
| 23 |
> |
int n, |
| 24 |
> |
FILE *fp |
| 25 |
> |
) |
| 26 |
|
{ |
| 27 |
|
int quote = '\0'; |
| 28 |
< |
register char *cp; |
| 29 |
< |
register int c; |
| 28 |
> |
char *cp; |
| 29 |
> |
int c; |
| 30 |
> |
/* sanity checks */ |
| 31 |
> |
if ((s == NULL) | (n < 2)) |
| 32 |
> |
return(NULL); |
| 33 |
|
/* skip initial white space */ |
| 34 |
|
do |
| 35 |
|
c = getc(fp); |
| 36 |
|
while (isspace(c)); |
| 37 |
|
/* check for quote */ |
| 38 |
< |
if ((c == '"' | c == '\'')) { |
| 38 |
> |
if (isquote(c)) { |
| 39 |
|
quote = c; |
| 40 |
|
c = getc(fp); |
| 41 |
|
} |
| 42 |
< |
/* check for end of file */ |
| 43 |
< |
if (c == EOF) |
| 44 |
< |
return(NULL); |
| 45 |
< |
/* get actual word */ |
| 46 |
< |
cp = s; |
| 47 |
< |
do { |
| 48 |
< |
if (--n <= 0) /* check length limit */ |
| 49 |
< |
break; |
| 50 |
< |
*cp++ = c; |
| 51 |
< |
c = getc(fp); |
| 52 |
< |
} while (c != EOF && !(quote ? c==quote : isspace(c))); |
| 42 |
> |
cp = s; /* get actual word */ |
| 43 |
> |
while (c != EOF) { |
| 44 |
> |
if (c == quote) /* end quote? */ |
| 45 |
> |
quote = '\0'; |
| 46 |
> |
else if (!quote && isquote(c)) |
| 47 |
> |
quote = c; /* started new quote */ |
| 48 |
> |
else { |
| 49 |
> |
if (!quote && isspace(c)) |
| 50 |
> |
break; /* end of word */ |
| 51 |
> |
if (--n <= 0) |
| 52 |
> |
break; /* hit length limit */ |
| 53 |
> |
*cp++ = c; |
| 54 |
> |
} |
| 55 |
> |
c = getc(fp); /* get next character */ |
| 56 |
> |
} |
| 57 |
|
*cp = '\0'; |
| 58 |
< |
if ((c != EOF & !quote)) /* replace space */ |
| 59 |
< |
ungetc(c, fp); |
| 58 |
> |
if ((c == EOF) & (cp == s)) /* hit end-of-file? */ |
| 59 |
> |
return(NULL); |
| 60 |
|
return(s); |
| 61 |
|
} |
