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Various different integer types are used throughout MuPDF.
In general:
* int is assumed to be 32bit at least.
* short is assumed to be exactly 16 bits.
* char is assumed to be exactly 8 bits.
* array sizes, string lengths, and allocations
are measured using size_t. size_t is 32bit in 32bit builds,
and 64bit on all 64bit builds.
* buffers of data use unsigned chars (or uint8_t's).
* Offsets within files/streams are represented using fz_off_t's.
fz_off_t's are 64bits in 64bit builds, or in 32bit builds with
FZ_LARGEFILE defined. Otherwise they are a native int (so 32bit
in 32bit builds).
In addition, we use floats and doubles, assumed to be IEEE compliant.
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