diff options
Diffstat (limited to 'src/pal/src/safecrt/strlen_s.cpp')
-rw-r--r-- | src/pal/src/safecrt/strlen_s.cpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/pal/src/safecrt/strlen_s.cpp b/src/pal/src/safecrt/strlen_s.cpp new file mode 100644 index 0000000000..3f1e1cf1ae --- /dev/null +++ b/src/pal/src/safecrt/strlen_s.cpp @@ -0,0 +1,58 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +/*** +*strlen_s.c - contains strnlen() routine +* + +* +*Purpose: +* strnlen returns the length of a null-terminated string, +* not including the null byte itself, up to the specified max size +* +*******************************************************************************/ + + +#include <string.h> +#include <errno.h> +#include <limits.h> +#include "internal_securecrt.h" + +#include "mbusafecrt_internal.h" + +/*** +*strnlen - return the length of a null-terminated string +* +*Purpose: +* Finds the length in bytes of the given string, not including +* the final null character. Only the first maxsize characters +* are inspected: if the null character is not found, maxsize is +* returned. +* +*Entry: +* const char * str - string whose length is to be computed +* size_t maxsize +* +*Exit: +* Length of the string "str", exclusive of the final null byte, or +* maxsize if the null character is not found. +* +*Exceptions: +* +*******************************************************************************/ + +size_t __cdecl PAL_strnlen(const char *str, size_t maxsize) +{ + size_t n; + + /* Note that we do not check if str == NULL, because we do not + * return errno_t... + */ + + for (n = 0; n < maxsize && *str; n++, str++) + ; + + return n; +} + |