1956385a7d
Provide a way to only customize specific string operations, such as for memcpy with the DMA capability by ROM. Signed-off-by: yangdongdong <yangdongdong@xiaomi.com>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/****************************************************************************
|
|
* libs/libc/string/lib_strncasecmp.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 <sys/types.h>
|
|
#include <strings.h>
|
|
#include <ctype.h>
|
|
|
|
#include "libc.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#if !defined(CONFIG_LIBC_ARCH_STRNCASECMP) && defined(LIBC_BUILD_STRNCASECMP)
|
|
#undef strncasecmp /* See mm/README.txt */
|
|
int strncasecmp(FAR const char *cs, FAR const char *ct, size_t nb)
|
|
{
|
|
register int result = 0;
|
|
for (; nb > 0; nb--)
|
|
{
|
|
if ((result = toupper(*cs) - toupper(*ct)) != 0 ||
|
|
*cs == '\0')
|
|
{
|
|
break;
|
|
}
|
|
|
|
cs++;
|
|
ct++;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
#endif
|