+/* This is a utility macro to handle the situation where the code
+ wants to place a constant string into the code, followed by a
+ comma and then the length of the string. Doing this by hand
+ is error prone, so using this macro is safer. The macro will
+ also safely handle the case where a NULL is passed as the arg. */
+#define STRING_COMMA_LEN(STR) (STR), ((STR) ? sizeof (STR) - 1 : 0)
+/* Unfortunately it is not possible to use the STRING_COMMA_LEN macro
+ to create the arguments to another macro, since the preprocessor
+ will mis-count the number of arguments to the outer macro (by not
+ evaluating STRING_COMMA_LEN and so missing the comma). This is a
+ problem for example when trying to use STRING_COMMA_LEN to build
+ the arguments to the strncmp() macro. Hence this alternative
+ definition of strncmp is provided here.
+
+ Note - these macros do NOT work if STR2 is not a constant string. */
+#define CONST_STRNEQ(STR1,STR2) (strncmp ((STR1), (STR2), sizeof (STR2) - 1) == 0)
+ /* strcpy() can have a similar problem, but since we know we are
+ copying a constant string, we can use memcpy which will be faster
+ since there is no need to check for a NUL byte inside STR. We
+ can also save time if we do not need to copy the terminating NUL. */
+#define LITMEMCPY(DEST,STR2) memcpy ((DEST), (STR2), sizeof (STR2) - 1)
+#define LITSTRCPY(DEST,STR2) memcpy ((DEST), (STR2), sizeof (STR2))
+
+