65 lines
3.1 KiB
C
65 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ This program is free software; you can redistribute it and/or modify │
|
|
│ it under the terms of the GNU General Public License as published by │
|
|
│ the Free Software Foundation; version 2 of the License. │
|
|
│ │
|
|
│ This program is distributed in the hope that it will be useful, but │
|
|
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
|
|
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
|
|
│ General Public License for more details. │
|
|
│ │
|
|
│ You should have received a copy of the GNU General Public License │
|
|
│ along with this program; if not, write to the Free Software │
|
|
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
|
│ 02110-1301 USA │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/assert.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/stdio/internal.h"
|
|
#include "libc/stdio/stdio.h"
|
|
|
|
#define GETDELIM_MAX 65536
|
|
|
|
/**
|
|
* Reads string from stream.
|
|
*
|
|
* @param line is the caller's buffer (in/out) which is extended
|
|
* automatically. *line may be NULL but only if *n is 0;
|
|
* NUL-termination is guaranteed FTMP
|
|
* @param n is the capacity of line (in/out)
|
|
* @param delim is the stop char (and NUL is implicitly too)
|
|
* @return number of bytes read, including delim, excluding NUL, or -1
|
|
* w/ errno on EOF or error; see ferror() and feof()
|
|
* @note this function can't punt EINTR to caller
|
|
* @see getline(), gettok_r()
|
|
*/
|
|
ssize_t getdelim(char **line, size_t *n, int delim, FILE *f) {
|
|
STATIC_YOINK("realloc");
|
|
assert((*line && *n) || (!*line && !*n));
|
|
ssize_t rc = -1;
|
|
size_t i = 0;
|
|
int c;
|
|
for (;;) {
|
|
if ((c = getc(f)) == -1) {
|
|
if (ferror(f) == EINTR) continue;
|
|
if (feof(f) && i) rc = i;
|
|
break;
|
|
}
|
|
if (i + 2 >= *n && !__grow(line, n, 1, 0)) {
|
|
__fseterrno(f);
|
|
break;
|
|
}
|
|
if (((*line)[i++] = c) == delim) {
|
|
rc = i;
|
|
break;
|
|
}
|
|
}
|
|
if (*line && i < *n) (*line)[i] = '\0';
|
|
return rc;
|
|
}
|