From: Justin Cinkelj <justin.cink...@xlab.si>
Committer: Nadav Har'El <n...@scylladb.com>
Branch: master
libc: add stresep.c file
File is literal copy from
ftp.tku.edu.tw/NetBSD/NetBSD-current/src/lib/libc/string/stresep.c
Signed-off-by: Justin Cinkelj <justin.cink...@xlab.si>
Message-Id: <20170913120516.17024-2-justin.cink...@xlab.si>
---
diff --git a/libc/string/stresep.c b/libc/string/stresep.c
--- a/libc/string/stresep.c
+++ b/libc/string/stresep.c
@@ -0,0 +1,98 @@
+/* $NetBSD: stresep.c,v 1.4 2017/08/23 10:27:41 christos Exp $ */
+
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: stresep.c,v 1.4 2017/08/23 10:27:41 christos Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include "namespace.h"
+
+#include <assert.h>
+#include <string.h>
+
+#ifdef __weak_alias
+__weak_alias(stresep,_stresep)
+#endif
+
+/*
+ * Get next token from string *stringp, where tokens are possibly-empty
+ * strings separated by characters from delim. If esc is not NUL, then
+ * the characters followed by esc are ignored and are not taken into
account
+ * when splitting the string.
+ *
+ * Writes NULs into the string at *stringp to end tokens.
+ * delim need not remain constant from call to call.
+ * On return, *stringp points past the last NUL written (if there might
+ * be further tokens), or is NULL (if there are definitely no more tokens).
+ *
+ * If *stringp is NULL, stresep returns NULL.
+ */
+char *
+stresep(char **stringp, const char *delim, int esc)
+{
+ char *s;
+ const char *spanp;
+ int c, sc;
+ size_t l;
+ char *tok;
+
+ _DIAGASSERT(stringp != NULL);
+ _DIAGASSERT(delim != NULL);
+
+ if ((s = *stringp) == NULL)
+ return NULL;
+ l = strlen(s) + 1;
+ for (tok = s;;) {
+ c = *s++;
+ l--;
+ while (esc != '\0' && c == esc) {
+ memmove(s - 1, s, l);
+ c = *s++;
+ l--;
+ }
+ spanp = delim;
+ do {
+ if ((sc = *spanp++) == c) {
+ if (c == '\0')
+ s = NULL;
+ else
+ s[-1] = '\0';
+ *stringp = s;
+ return tok;
+ }
+ } while (sc != '\0');
+ }
+}
--
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