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strncpy would fail if n==0

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Gregory Nutt
2014-03-28 15:17:43 -06:00
parent f12e37cae4
commit a0b330bd92
2 changed files with 24 additions and 22 deletions
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libc/string/lib_strncpy.c
+8 -4
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@@ -1,7 +1,7 @@
/************************************************************
* libc/string/lib_strncpy.c
*
* Copyright (C) 2007, 2011 Gregory Nutt. All rights reserved.
* Copyright (C) 2007, 2011, 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@@ -42,16 +42,20 @@
#include <string.h>
/************************************************************
* Global Functions
* Public Functions
************************************************************/
/************************************************************
* Name: strncpy
************************************************************/
#ifndef CONFIG_ARCH_STRNCPY
char *strncpy(char *dest, const char *src, size_t n)
char *strncpy(FAR char *dest, FAR const char *src, size_t n)
{
char *ret = dest; /* Value to be returned */
char *end = dest + n; /* End of dest buffer + 1 byte */
while ((*dest++ = *src++) != '\0' && dest != end);
while (dest != end && (*dest++ = *src++) != '\0');
return ret;
}
#endif