diff options
Diffstat (limited to 'include/dlt/dlt_common.h')
| -rw-r--r-- | include/dlt/dlt_common.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/dlt/dlt_common.h b/include/dlt/dlt_common.h index 166395e..9bbd544 100644 --- a/include/dlt/dlt_common.h +++ b/include/dlt/dlt_common.h @@ -87,6 +87,12 @@ # include <time.h> # endif +# if defined(__GNUC__) +# define PURE_FUNCTION __attribute__((pure)) +# else +# define PURE_FUNCTION /* nothing */ +# endif + # if !defined (__WIN32__) && !defined(_MSC_VER) # include <termios.h> # endif @@ -861,6 +867,17 @@ DltReturnValue dlt_print_mixed_string(char *text, int textlength, uint8_t *ptr, DltReturnValue dlt_print_char_string(char **text, int textlength, uint8_t *ptr, int size); /** + * Helper function to determine a bounded length of a string. + * This function returns zero if @a str is a null pointer, + * and it returns @a maxsize if the null character was not found in the first @a maxsize bytes of @a str. + * This is a re-implementation of C11's strnlen_s, which we cannot yet assume to be available. + * @param text pointer to string whose length is to be determined + * @param maxsize maximal considered length of @a str + * @return the bounded length of the string + */ +PURE_FUNCTION size_t dlt_strnlen_s(const char* str, size_t maxsize); + +/** * Helper function to print an id. * @param text pointer to ASCII string where to write the id * @param id four byte char array as used in DLT mesages as IDs. |