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                                page_size

   Usage
   #include <page.h>
   unsigned page_size(void far *baseptr, unsigned p);

   Description
   Returns  the  number  of bytes allocated for the block  of  memory  at
   offset   p   that  was  allocated  by  page_malloc,   page_calloc   or
   page_realloc.

   Implemented as a macro in page.h.

   Return Value
   The number of bytes in the block.