From fc83bdab6643a27ed8919dabe328d8ffcffe86a6 Mon Sep 17 00:00:00 2001
From: ache <ache@FreeBSD.org>
Date: Wed, 10 Oct 2001 02:17:35 +0000
Subject: Implement strcasestr() which many others (f.e. Linux) already have.
---
lib/libc/string/Makefile.inc | 3 +-
lib/libc/string/strcasestr.c | 68 ++++++++++++++++++++++++++++++++++++++++++++
lib/libc/string/strstr.3 | 10 ++++++-
3 files changed, 79 insertions(+), 2 deletions(-)
create mode 100644 lib/libc/string/strcasestr.c
diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc
index dcd2dfd..54903e3 100644
--- a/lib/libc/string/Makefile.inc
+++ b/lib/libc/string/Makefile.inc
@@ -10,7 +10,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c ffs.c index.c memccpy.c memchr.c memcmp.c \
memcpy.c memmove.c memset.c rindex.c strcasecmp.c strcat.c strchr.c \
strcmp.c strcoll.c strcpy.c strcspn.c strdup.c strerror.c \
strlcat.c strlcpy.c strlen.c strmode.c strncat.c strncmp.c strncpy.c \
- strnstr.c \
+ strcasestr.c strnstr.c \
strpbrk.c strrchr.c strsep.c strsignal.c strspn.c strstr.c strtok.c \
strxfrm.c swab.c wcscat.c wcschr.c wcscmp.c wcscpy.c wcscspn.c \
wcslcat.c wcslcpy.c wcslen.c wcsncat.c wcsncmp.c wcsncpy.c wcspbrk.c \
@@ -37,6 +37,7 @@ MLINKS+=strcpy.3 strncpy.3
MLINKS+=strerror.3 perror.3 strerror.3 sys_errlist.3 strerror.3 sys_nerr.3
MLINKS+=strlcpy.3 strlcat.3
MLINKS+=strtok.3 strtok_r.3
+MLINKS+=strstr.3 strcasestr.3
MLINKS+=strstr.3 strnstr.3
MLINKS+=wmemchr.3 wmemcmp.3 wmemchr.3 wmemcpy.3 \
wmemchr.3 wmemmove.3 wmemchr.3 wmemset.3 \
diff --git a/lib/libc/string/strcasestr.c b/lib/libc/string/strcasestr.c
new file mode 100644
index 0000000..b56c63b
--- /dev/null
+++ b/lib/libc/string/strcasestr.c
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif
+
+#include <sys/cdefs.h>
+#include <ctype.h>
+#include <string.h>
+
+/*
+ * Find the first occurrence of find in s, ignore case.
+ */
+char *
+strcasestr(s, find)
+ register const char *s, *find;
+{
+ register char c, sc;
+ register size_t len;
+
+ if ((c = *find++) != 0) {
+ c = tolower((unsigned char)c);
+ len = strlen(find);
+ do {
+ do {
+ if ((sc = *s++) == 0)
+ return (NULL);
+ } while ((char)tolower((unsigned char)sc) != c);
+ } while (strncasecmp(s, find, len) != 0);
+ s--;
+ }
+ return ((char *)s);
+}
diff --git a/lib/libc/string/strstr.3 b/lib/libc/string/strstr.3
index c8aca32..d71537d 100644
--- a/lib/libc/string/strstr.3
+++ b/lib/libc/string/strstr.3
@@ -41,7 +41,7 @@
.Dt STRSTR 3
.Os
.Sh NAME
-.Nm strstr , strnstr
+.Nm strstr , strcasestr , strnstr
.Nd locate a substring in a string
.Sh LIBRARY
.Lb libc
@@ -50,6 +50,8 @@
.Ft char *
.Fn strstr "const char *big" "const char *little"
.Ft char *
+.Fn strcasestr "const char *big" "const char *little"
+.Ft char *
.Fn strnstr "const char *big" "const char *little" "size_t len"
.Sh DESCRIPTION
The
@@ -61,6 +63,12 @@ in the null-terminated string
.Fa big .
.Pp
The
+.Fn strcasestr
+function is similar to
+.Fn strstr
+but ignores the case of both strings.
+.Pp
+The
.Fn strnstr
function
locates the first occurrence of the null-terminated string
--
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