30 Mar
2010
30 Mar
'10
10:39
On 2010-03-30, at 10:34 AM, Alex Queiroz wrote:
I always use ___FETCH_U* with a C integer as the second argument, i. e., I don't use the ___INT() conversion macro.
Indeed the ___INT(x) macro converts the fixnum x into a C int. It is the inverse of the ___FIX(n) macro which converts a C int into a fixnum. The simplest way to do what you want is: char *u8vectorptr = ___CAST(char*,___BODY(theu8vectorschemeobjectvariable)); then u8vectorptr[i] = ...; Note that you can only do this if the u8vector will not move (it is either a ___STILL or ___PERM object, or you don't make any calls back to Scheme or the Gambit memory allocator inside your C function. Marc