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authorwollman <wollman@FreeBSD.org>1994-08-05 01:19:12 +0000
committerwollman <wollman@FreeBSD.org>1994-08-05 01:19:12 +0000
commite017c781cac0ce8879390a958837f07f3ae09f36 (patch)
tree3e3913f9a690f2310dfc0d620e8803f623b40b54 /lib/libc/i386/string/strchr.S
parent962b8cc8e0b8959ba3824a40a58f846de4027f04 (diff)
downloadFreeBSD-src-e017c781cac0ce8879390a958837f07f3ae09f36.zip
FreeBSD-src-e017c781cac0ce8879390a958837f07f3ae09f36.tar.gz
First crack at making libc work with the new make macros. It compiles on
my machine, and a simple static (genassym) and shared (sysctl) executable both work. Still to be done: RPCand YP merge.
Diffstat (limited to 'lib/libc/i386/string/strchr.S')
-rw-r--r--lib/libc/i386/string/strchr.S68
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/libc/i386/string/strchr.S b/lib/libc/i386/string/strchr.S
new file mode 100644
index 0000000..1b44b28
--- /dev/null
+++ b/lib/libc/i386/string/strchr.S
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 1993 Winning Strategies, Inc.
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Winning Strategies, Inc.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software withough specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $Id: strchr.S,v 1.1 1993/12/05 13:01:56 ats Exp $
+ */
+
+#if defined(LIBC_RCS) && !defined(lint)
+ .asciz "$Id: strchr.S,v 1.1 1993/12/05 13:01:56 ats Exp $"
+#endif /* LIBC_RCS and not lint */
+
+#include "DEFS.h"
+
+/*
+ * strchr(s, c)
+ * return a pointer to the first occurance of the character c in
+ * string s, or NULL if c does not occur in the string.
+ *
+ * %edx - pointer iterating through string
+ * %eax - pointer to first occurance of 'c'
+ * %cl - character we're comparing against
+ * %bl - character at %edx
+ *
+ * Written by:
+ * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
+ */
+
+ENTRY(strchr)
+ pushl %ebx
+ movl 8(%esp),%eax
+ movb 12(%esp),%cl
+ .align 2,0x90
+L1:
+ movb (%eax),%bl
+ cmpb %bl,%cl /* found char??? */
+ je L2
+ incl %eax
+ testb %bl,%bl /* null terminator??? */
+ jne L1
+ xorl %eax,%eax
+L2:
+ popl %ebx
+ ret
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