[src/trunk]: src/tools/compat add a stdio neutral getline/getdelim implementa...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f5d054575057
branches:  trunk
changeset: 763462:f5d054575057
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Mar 20 20:48:57 2011 +0000

description:
add a stdio neutral getline/getdelim implementation.

diffstat:

 tools/compat/getline.c |  107 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 107 insertions(+), 0 deletions(-)

diffs (111 lines):

diff -r e3002f7a8a96 -r f5d054575057 tools/compat/getline.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/compat/getline.c    Sun Mar 20 20:48:57 2011 +0000
@@ -0,0 +1,107 @@
+/*     $NetBSD: getline.c,v 1.1 2011/03/20 20:48:57 christos Exp $     */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+
+#if !HAVE_GETLINE
+#include <stdlib.h>
+
+#ifndef HAVE_NBTOOL_CONFIG_H
+/* These headers are required, but included from nbtool_config.h */
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#endif
+
+ssize_t
+getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
+{
+       char *ptr, *eptr;
+
+
+       if (*buf == NULL || *bufsiz == 0) {
+               *bufsiz = BUFSIZ;
+               if ((*buf = malloc(*bufsiz)) == NULL)
+                       return -1;
+       }
+
+       for (ptr = *buf, eptr = *buf + *bufsiz;;) {
+               int c = fgetc(fp);
+               if (c == -1) {
+                       if (feof(fp))
+                               return ptr == *buf ? -1 : ptr - *buf;
+                       else
+                               return -1;
+               }
+               *ptr++ = c;
+               if (c == delimiter) {
+                       *ptr = '\0';
+                       return ptr - *buf;
+               }
+               if (ptr + 2 >= eptr) {
+                       char *nbuf;
+                       size_t nbufsiz = *bufsiz * 2;
+                       ssize_t d = ptr - *buf;
+                       if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
+                               return -1;
+                       *buf = nbuf;
+                       *bufsiz = nbufsiz;
+                       eptr = nbuf + nbufsiz;
+                       ptr = nbuf + d;
+               }
+       }
+}
+
+ssize_t
+getline(char **buf, size_t *bufsiz, FILE *fp)
+{
+       return getdelim(buf, bufsiz, '\n', fp);
+}
+
+#endif
+
+#ifdef TEST
+int
+main(int argc, char *argv[])
+{
+       char *p = NULL;
+       ssize_t len;
+       size_t n = 0;
+
+       while ((len = getline(&p, &n, stdin)) != -1)
+               (void)printf("%zd %s", len, p);
+       free(p);
+       return 0;
+}
+#endif