Type 5 – Maps¶
CBOR maps are the plain old associate hash maps known from JSON and many other formats and languages, with one exception: any CBOR data item can be a key, not just strings. This is somewhat unusual and you, as an application developer, should keep that in mind.
Maps can be either definite or indefinite, in much the same way as Type 4 – Arrays.
Corresponding cbor_type |
CBOR_TYPE_MAP |
Number of allocations (definite) | Two plus any manipulations with the data |
Number of allocations (indefinite) | Two plus logarithmically many reallocations relative to additions |
Storage requirements (definite) | sizeof(cbor_pair) * size + sizeof(cbor_item_t) |
Storage requirements (indefinite) | <= sizeof(cbor_item_t) + sizeof(cbor_pair) * size * BUFFER_GROWTH |
Streaming maps¶
Please refer to Streaming & indefinite items.
Getting metadata¶
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Reading data¶
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Creating new items¶
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml
Modifying items¶
Warning
doxygenfunction: Cannot find file: /tmp/B.5qzRfz/BUILD/libcbor-0.5.0/doc/build/doxygen/xml/index.xml