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define: DUK_USE_DATAPTR16
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feature_enables: DUK_OPT_DATAPTR16
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introduced: 1.1.0
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related:
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- DUK_USE_DATAPTR_ENC16
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- DUK_USE_DATAPTR_DEC16
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default: false
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tags:
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- lowmemory
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- experimental
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description: >
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Enable "compression" of arbitrary data pointers into an unsigned 16-bit
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value. Use together with DUK_USE_DATAPTR_ENC16 and DUK_USE_DATAPTR_DEC16.
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Pointers compressed are any void pointers in C code, not just the Duktape
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heap. Also NULL pointer must encode and decode correctly.
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Currently it is required that NULL encodes to integer 0, and integer
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0 decodes to NULL. No other pointer can be encoded to 0.
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NOTE: This feature option is currently unimplemented, i.e. Duktape won't
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compress any data pointers at the moment.
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