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Add strncmp()

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@385 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2007-11-18 14:32:06 +00:00
parent dd0e40bbed
commit 5698f351b1
2 changed files with 71 additions and 5 deletions
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lib/Makefile
+6 -5
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@@ -1,5 +1,5 @@
############################################################################
# Makefile
# lib/Makefile
#
# Copyright (C) 2007 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -45,10 +45,11 @@ ifneq ($(CONFIG_NFILE_STREAMS),0)
MISC_SRCS += lib_streamsem.c
endif
STRING_SRCS = lib_memset.c lib_memcpy.c lib_memcmp.c lib_memmove.c lib_strcpy.c \
lib_strncpy.c lib_strcmp.c lib_strlen.c lib_strdup.c lib_strtol.c lib_strchr.c \
lib_strrchr.c lib_strspn.c lib_strcspn.c lib_strtok.c lib_strtokr.c \
lib_strerror.c
STRING_SRCS = lib_memset.c lib_memcpy.c lib_memcmp.c lib_memmove.c \
lib_strcpy.c lib_strncpy.c lib_strcmp.c lib_strncmp.c \
lib_strlen.c lib_strdup.c lib_strtol.c lib_strchr.c \
lib_strrchr.c lib_strspn.c lib_strcspn.c lib_strtok.c \
lib_strtokr.c lib_strerror.c
CTYPE_SRCS =
lib/lib_strncmp.c
+65
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@@ -0,0 +1,65 @@
/************************************************************
* lib_strncmp.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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. Neither the name Gregory Nutt 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 COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
************************************************************/
/************************************************************
* Compilation Switches
************************************************************/
/************************************************************
* Included Files
************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <string.h>
/************************************************************
* Global Functions
************************************************************/
#ifndef CONFIG_ARCH_STRNCMP
int strncmp(const char *cs, const char *ct, size_t nb)
{
register signed char result = 0;
for (; nb > 0; nb--)
{
if ((result = *cs - *ct++) != 0 || !*cs++)
{
break;
}
}
return result;
}
#endif