Type 4 functions specifically state that they are bound by the implementation limits in Annex C.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johannes Tax Sent: Sunday, January 24, 2010 10:31 PM To: [email protected] Subject: [pdf-devel] Type 4 & implementation limits Hello, I have some questions regarding type 4 functions and implementation limits. The specifiction says that an error must be raised if an operation tries to exceed an implementation limit, so I assume the same holds true for type 4 functions. I have seen some macros for library specific limits (PDF_I32_MAX, no MIN defined yet), should those limits also be used for the type 4 floating point return values or should floating point specific limits be defined? If so I would also recommend to add some special value that can be returned by the pdf_fp_* functions to signal an over-/underflow, something similar to HUGE_VAL in libc. The specification also explicitely allows that intermediate results of type 4 functions do not fall under the implementation limit restrictions. It would be possible to allow larger values for intermediate results, as we are calculating with doubles but returning pdf_real_t (float). Is this desirable? If so, against which limits should the intermediate results be checked then? Against libc's limits? Johannes -- Johannes Tax [email protected]
