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From: Szabolcs Nagy <nsz@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/arm/morello/main] aarch64: morello: string: dummy c strspn
Date: Thu, 27 Oct 2022 13:51:46 +0000 (GMT)	[thread overview]
Message-ID: <20221027135146.19D063851531@sourceware.org> (raw)

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d8827155646662902e79773fc609b666e0aa63d1

commit d8827155646662902e79773fc609b666e0aa63d1
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Wed Mar 16 10:58:57 2022 +0000

    aarch64: morello: string: dummy c strspn
    
    avoids out of bound access of the generic implementation.

Diff:
---
 sysdeps/aarch64/morello/strspn.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/sysdeps/aarch64/morello/strspn.c b/sysdeps/aarch64/morello/strspn.c
new file mode 100644
index 0000000000..7ec59aaf15
--- /dev/null
+++ b/sysdeps/aarch64/morello/strspn.c
@@ -0,0 +1,40 @@
+/* Simple strspn.
+
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+
+size_t strspn (const char *str, const char *accept)
+{
+  if (accept[0] == 0)
+    return 0;
+  if (accept[1] == 0)
+    {
+      const char *p;
+      for (p = str; *p == accept[0]; p++);
+      return p - str;
+    }
+
+  unsigned char table[256] = {0};
+  unsigned char *us;
+  for (us = (unsigned char*) accept; *us != 0; table[*us++] = 1);
+
+  for (us = (unsigned char*) str; table[*us] != 0; us++);
+  return us - (unsigned char *) str;
+}
+libc_hidden_builtin_def (strspn)

             reply	other threads:[~2022-10-27 13:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-27 13:51 Szabolcs Nagy [this message]
  -- strict thread matches above, loose matches on Subject: below --
2022-11-23 14:41 Szabolcs Nagy
2022-10-26 15:13 Szabolcs Nagy
2022-08-05 19:31 Szabolcs Nagy

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