These routines are provided for writing portable software
that uses libtiff; they hide any memory-management
related issues, such as dealing with segmented architectures
found on 16-bit machines.
_TIFFmalloc and _TIFFrealloc are used to
dynamically allocate and reallocate memory used by
libtiff; such as memory passed into the I/O routines.
Memory allocated through these interfaces is released back
to the system using the _TIFFfree routine.
Memory allocated through one of the above interfaces can
be set to a known value using _TIFFmemset, copied to
another memory location using _TIFFmemcpy, or
compared for equality using _TIFFmemcmp. These
routines conform to the equivalent ANSI C
routines: memset, memcpy, and memcmp,
respectively.
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