getlnmaxsep.c (744B)
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 9 int getlnmaxsep (buffer *b, char *d, size_t max, size_t *w, char const *sep, size_t seplen) 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_bytein(v, 2, sep, seplen) ; 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 }