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The following commit(s) were added to refs/heads/master by this push:
new 5430de72f8 libc/lib_rawmemchr.c:Add rawmemchr methon.
5430de72f8 is described below
commit 5430de72f806dd799a358832f01de518c44ab27b
Author: chenrun1 <chenr...@xiaomi.com>
AuthorDate: Wed Feb 8 14:23:21 2023 +0800
libc/lib_rawmemchr.c:Add rawmemchr methon.
---
include/string.h | 1 +
libs/libc/string/Make.defs | 2 +-
libs/libc/string/lib_rawmemchr.c | 59 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 61 insertions(+), 1 deletion(-)
diff --git a/include/string.h b/include/string.h
index 5cb4a5b6d5..0e537b014c 100644
--- a/include/string.h
+++ b/include/string.h
@@ -95,6 +95,7 @@ int strverscmp(FAR const char *s1, FAR const char *s2);
FAR void *memchr(FAR const void *s, int c, size_t n);
FAR void *memrchr(FAR const void *s, int c, size_t n);
+FAR void *rawmemchr(FAR const void *s, int c);
FAR void *memccpy(FAR void *s1, FAR const void *s2, int c, size_t n);
int memcmp(FAR const void *s1, FAR const void *s2, size_t n);
FAR void *memcpy(FAR void *dest, FAR const void *src, size_t n);
diff --git a/libs/libc/string/Make.defs b/libs/libc/string/Make.defs
index c9ff5a15fc..6f6f35c2bf 100644
--- a/libs/libc/string/Make.defs
+++ b/libs/libc/string/Make.defs
@@ -30,7 +30,7 @@ CSRCS += lib_strndup.c lib_strcasestr.c lib_strpbrk.c
lib_strrchr.c
CSRCS += lib_strspn.c lib_strstr.c lib_strtok.c lib_strtokr.c
CSRCS += lib_strsep.c lib_strerrorr.c lib_explicit_bzero.c lib_strsignal.c
CSRCS += lib_index.c lib_rindex.c lib_timingsafe_bcmp.c lib_strverscmp.c
-CSRCS += lib_mempcpy.c
+CSRCS += lib_mempcpy.c lib_rawmemchr.c
ifneq ($(CONFIG_LIBC_ARCH_MEMCHR),y)
CSRCS += lib_memchr.c
diff --git a/libs/libc/string/lib_rawmemchr.c b/libs/libc/string/lib_rawmemchr.c
new file mode 100644
index 0000000000..f4e99c9fbb
--- /dev/null
+++ b/libs/libc/string/lib_rawmemchr.c
@@ -0,0 +1,59 @@
+/****************************************************************************
+ * libs/libc/string/lib_rawmemchr.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <string.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: rawmemchr
+ *
+ * Description:
+ * The rawmemchr() function is similar to memchr(), it assumes (i.e., the
+ * programmer knows for certain) that an instance of c lies somewhere in
+ * the memory area starting at the location pointed to by s,and so performs
+ * an optimized search for c (i.e., no use of a count argument to limit the
+ * range of the search). If an instance of c is not found, the results are
+ * unpredictable.The following call is a fast means of locating a string's
+ * terminating null byte.
+ *
+ * Returned Value:
+ * The rawmemchr() function returns a pointer to the located byte, or a
+ * null pointer if the byte does not occur in the object.
+ *
+ ****************************************************************************/
+
+FAR void *rawmemchr(FAR const void *s, int c)
+{
+ if (c != '\0')
+ {
+ return memchr(s, c, SSIZE_MAX);
+ }
+
+ return (FAR char *)s + strlen(s);
+}
