On Fri, 25 Jul 2008, Michael Kerrisk wrote: > Not even one approach is consistent. Many functions don't set errno. > But there are one or two that don't raise exceptions: the Bessel > functions (j0(), y0 etc), for example. It's all a bit of a mess, > unfortunately. Those functions aren't in C99. They are however in POSIX, which defines C99-like error handling requirements, though a lot of errors are "may occur" just as a lot of C99 ones are. (But if a "may occur" error is indicated by one of errno and exceptions, it must be indicated by both if math_errhandling says both forms of error handling are supported.) (Bessel functions under different names and a lot of other functions are in DIS 24747, which passed its ballot for approval as an International Standard. But I don't expect it to be integrated in the next revision of the C standard; my understanding is also that all of C++ TR1 *apart* from special mathematical functions (much the same set) is being integrated in C++0x.) -- Joseph S. Myers joseph@xxxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
