Hi. I just added two additional functions to pdf-hash-helper.h: pdf_hash_add_size and pdf_hash_add_string.
The rule is to add new helper functions as you need it, so if you need to insert a pdf_off_t value to a hash, please add the pdf_hash_add_off function to pdf-hash-helper.[ch] and use it. Note that we are supporting helper functions for types defined in pdf-types.h or pdf-fp.h. Gerel, what do you think about adding 'pdf_hash_get_XXX' helper functions too? It would help to maintain the code using hashes clear. I would go for it.
