| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
greg |
2.8 |
static const char RCSid[] = "$Id: fgetline.c,v 2.7 2004/09/14 02:53:50 greg Exp $"; |
| 3 |
greg |
1.1 |
#endif |
| 4 |
|
|
/* |
| 5 |
greg |
1.2 |
* fgetline.c - read line with escaped newlines. |
| 6 |
greg |
1.1 |
* |
| 7 |
greg |
2.4 |
* External symbols declared in rtio.h |
| 8 |
greg |
2.2 |
*/ |
| 9 |
|
|
|
| 10 |
greg |
2.3 |
#include "copyright.h" |
| 11 |
greg |
1.1 |
|
| 12 |
greg |
2.4 |
#include "rtio.h" |
| 13 |
greg |
1.1 |
|
| 14 |
greg |
2.6 |
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */ |
| 15 |
greg |
2.7 |
#undef getc |
| 16 |
greg |
2.6 |
#define getc getc_unlocked |
| 17 |
|
|
#endif |
| 18 |
|
|
|
| 19 |
greg |
1.1 |
|
| 20 |
|
|
char * |
| 21 |
greg |
2.8 |
fgetline( /* read in line with escapes, elide final newline */ |
| 22 |
|
|
char *s, |
| 23 |
|
|
int n, |
| 24 |
|
|
FILE *fp |
| 25 |
|
|
) |
| 26 |
greg |
1.1 |
{ |
| 27 |
greg |
2.8 |
char *cp = s; |
| 28 |
|
|
int c = EOF; |
| 29 |
greg |
1.1 |
|
| 30 |
greg |
1.2 |
while (--n > 0 && (c = getc(fp)) != EOF) { |
| 31 |
greg |
2.5 |
if (c == '\r' && (c = getc(fp)) != '\n') { |
| 32 |
|
|
ungetc(c, fp); /* must be Apple file */ |
| 33 |
|
|
c = '\n'; |
| 34 |
|
|
} |
| 35 |
greg |
1.2 |
if (c == '\n' && (cp == s || cp[-1] != '\\')) |
| 36 |
|
|
break; |
| 37 |
greg |
1.1 |
*cp++ = c; |
| 38 |
|
|
} |
| 39 |
greg |
2.8 |
if ((cp == s) & (c == EOF)) |
| 40 |
greg |
1.1 |
return(NULL); |
| 41 |
greg |
1.2 |
*cp = '\0'; |
| 42 |
greg |
1.1 |
return(s); |
| 43 |
|
|
} |
