Annotation of embedaddon/tmux/compat/fgetln.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 2015 Joerg Jung <jung@openbsd.org>
! 3: *
! 4: * Permission to use, copy, modify, and distribute this software for any
! 5: * purpose with or without fee is hereby granted, provided that the above
! 6: * copyright notice and this permission notice appear in all copies.
! 7: *
! 8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 15: */
! 16:
! 17: /*
! 18: * portable fgetln() version, NOT reentrant
! 19: */
! 20:
! 21: #include <stdio.h>
! 22: #include <stdlib.h>
! 23: #include <errno.h>
! 24:
! 25: #include "compat.h"
! 26:
! 27: char *
! 28: fgetln(FILE *fp, size_t *len)
! 29: {
! 30: static char *buf = NULL;
! 31: static size_t bufsz = 0;
! 32: size_t r = 0;
! 33: char *p;
! 34: int c, e;
! 35:
! 36: if (!fp || !len) {
! 37: errno = EINVAL;
! 38: return NULL;
! 39: }
! 40: if (!buf) {
! 41: if (!(buf = calloc(1, BUFSIZ)))
! 42: return NULL;
! 43: bufsz = BUFSIZ;
! 44: }
! 45: while ((c = getc(fp)) != EOF) {
! 46: buf[r++] = c;
! 47: if (r == bufsz) {
! 48: if (!(p = reallocarray(buf, 2, bufsz))) {
! 49: e = errno;
! 50: free(buf);
! 51: errno = e;
! 52: buf = NULL, bufsz = 0;
! 53: return NULL;
! 54: }
! 55: buf = p, bufsz = 2 * bufsz;
! 56: }
! 57: if (c == '\n')
! 58: break;
! 59: }
! 60: return (*len = r) ? buf : NULL;
! 61: }
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