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62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
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* Copyright (c) 2015 Joerg Jung <jung@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* portable fgetln() version, NOT reentrant
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "compat.h"
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char *
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fgetln(FILE *fp, size_t *len)
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{
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static char *buf = NULL;
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static size_t bufsz = 0;
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size_t r = 0;
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char *p;
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int c, e;
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if (!fp || !len) {
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errno = EINVAL;
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return NULL;
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}
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if (!buf) {
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if (!(buf = calloc(1, BUFSIZ)))
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return NULL;
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bufsz = BUFSIZ;
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}
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while ((c = getc(fp)) != EOF) {
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buf[r++] = c;
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if (r == bufsz) {
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if (!(p = reallocarray(buf, 2, bufsz))) {
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e = errno;
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free(buf);
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errno = e;
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buf = NULL, bufsz = 0;
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return NULL;
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}
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buf = p, bufsz = 2 * bufsz;
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}
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if (c == '\n')
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break;
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}
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return (*len = r) ? buf : NULL;
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}
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