1 /* ISC license. */
2
3 #include <sys/uio.h>
4 #include <errno.h>
5 #include <skalibs/buffer.h>
6 #include <skalibs/siovec.h>
7 #include <skalibs/skamisc.h>
8
getlnmax(buffer * b,char * d,size_t max,size_t * w,char sep)9 int getlnmax (buffer *b, char *d, size_t max, size_t *w, char sep)
10 {
11 if (max < *w) return (errno = EINVAL, -1) ;
12 for (;;)
13 {
14 struct iovec v[2] ;
15 size_t len = buffer_len(b) ;
16 size_t pos ;
17 ssize_t r ;
18 buffer_rpeek(b, v) ;
19 if (len > max - *w) len = max - *w ;
20 pos = siovec_bytechr(v, 2, sep) ;
21 if (pos > len) pos = len ;
22 r = pos < len ; pos += r ;
23 buffer_getnofill(b, d + *w, pos) ; *w += pos ;
24 if (*w >= max) return (errno = ERANGE, -1) ;
25 if (r) return 1 ;
26 r = buffer_fill(b) ;
27 if (r <= 0) return r ;
28 }
29 }
30