AnyPS5/docs/dev/debt/libSceMetadataReaderWriter.md

# libSceMetadataReaderWriter technical debt

### Additional callable exports

- [Additional callable exports](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - 6 entries present in both version-labelled images are import-resolution declarations only. Neither label independently authenticates retail firmware provenance. Parameter lists, return types and behavior are unverified; parameterless `int` declarations are placeholders, not verified ABI contracts. Every entry throws through `NotImplemented_nid_no_patch`. Unidentified names use literal NID aliases. No runtime functionality is implemented. Data exports require separate layout and ownership analysis. Identified candidate names match their NIDs in the [public symbol database](https://github.com/zecoxao/sce_symbols/blob/2883963a0a514ba6e77407a08ef4730a65e88254/aerolib.csv) or [supplemental catalog](https://github.com/claimore22/ps5rs/blob/2304be5131221bae0dac24b9767cabffda33f747/data/nids.csv).

| Name | NID |
| --- | --- |
| `Unknown` | `2oFr2hbrkRs` |
| `Unknown` | `ElB1bNKymPg` |
| `Unknown` | `GCOzTsybYr0` |
| `Unknown` | `Ly4V1dsyKCA` |
| `Unknown` | `YeIbFGmyUVM` |
| `Unknown` | `ckVz4iaNj4E` |

- [Older callable NIDs](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp): 2 unidentified exports have unverified names, signatures and behavior. These are throwing import-resolution placeholders; no functionality is implemented. No matching NIDs were found in the later module inventory.

### Unknown function info

- [_ZN23sceMetadataReaderWriter10initializeEv, _ZN23sceMetadataReaderWriter11getMimeTypeERKSsRSt6vectorIjSaIjEE, _ZN23sceMetadataReaderWriter12getMimeTypesERKSsiPi, _ZN23sceMetadataReaderWriter12readMetadataERKSsRKNS_8MetadataEjRS2_, _ZN23sceMetadataReaderWriter13writeMetadataERKSsRKNS_8MetadataEj](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter13writeMetadataERKSsRKNS_8MetadataEjPS2_, _ZN23sceMetadataReaderWriter15ParserInterfaceC1ERKS0_, _ZN23sceMetadataReaderWriter15ParserInterfaceC2ERKS0_, _ZN23sceMetadataReaderWriter16extractThumbnailERKSsjRNS_9ThumbnailE, _ZN23sceMetadataReaderWriter16getNumOfMimeTypeERKSsPi](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter17getParserInfoListERSt6vectorINS_10ParserInfoESaIS1_EE, _ZN23sceMetadataReaderWriter18registerParserInfoERKSt6vectorINS_10ParserInfoESaIS1_EE, _ZN23sceMetadataReaderWriter20unregisterParserInfoEv, _ZN23sceMetadataReaderWriter23registerParserInterfaceEjRKNS_15ParserInterfaceE, _ZN23sceMetadataReaderWriter5ValueaSERS0_](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter8Metadata11DeserializeERN3sce4Json5ValueERS0_, _ZN23sceMetadataReaderWriter8Metadata11deleteFieldERKSs, _ZN23sceMetadataReaderWriter8Metadata15iterateAllFieldEPFiRKSsRKNS_5ValueEbE, _ZN23sceMetadataReaderWriter8Metadata8getFieldEiRSsRNS_5ValueERb, _ZN23sceMetadataReaderWriter8Metadata8setFieldERKSs](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter8Metadata8setFieldERKSsRKNS_5ValueE, _ZN23sceMetadataReaderWriter8Metadata9SerializeERS0_RN3sce4Json5ValueE, _ZN23sceMetadataReaderWriter8MetadataC1EPFPvmEPFvS1_E, _ZN23sceMetadataReaderWriter8MetadataC1ERKS0_, _ZN23sceMetadataReaderWriter8MetadataC1ERKS0_PFPvmEPFvS3_E](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter8MetadataC1Ev, _ZN23sceMetadataReaderWriter8MetadataC2EPFPvmEPFvS1_E, _ZN23sceMetadataReaderWriter8MetadataC2ERKS0_, _ZN23sceMetadataReaderWriter8MetadataC2ERKS0_PFPvmEPFvS3_E, _ZN23sceMetadataReaderWriter8MetadataC2Ev](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter8MetadataD0Ev, _ZN23sceMetadataReaderWriter8MetadataD1Ev, _ZN23sceMetadataReaderWriter8MetadataD2Ev, _ZN23sceMetadataReaderWriter8MetadataaSERKS0_, _ZN23sceMetadataReaderWriter8finalizeEv](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZNK23sceMetadataReaderWriter8Metadata13getFieldCountEv, _ZNK23sceMetadataReaderWriter8Metadata8getFieldEiRSsRNS_5ValueE, _ZNK23sceMetadataReaderWriter8Metadata8getValueERKSsRNS_5ValueE, _ZNK23sceMetadataReaderWriter8Metadata9dumpValueEv](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - names and NIDs match the [PS5 3.20 inventory](https://github.com/DNNDHH/PS5-3.20_Libs/blob/b2a77c09cd71c01f34c790cfbe98c751a13262ad/libSceMetadataReaderWriter.c); signatures and behavior are unverified. No-parameter declarations resolve imports and throw through `NotImplemented_nid_no_patch` when called.
- [_ZN23sceMetadataReaderWriter10initializeEv, _ZN23sceMetadataReaderWriter11getMimeTypeERKSsRSt6vectorIjSaIjEE, _ZN23sceMetadataReaderWriter12getMimeTypesERKSsiPi, _ZN23sceMetadataReaderWriter12readMetadataERKSsRKNS_8MetadataEjRS2_, _ZN23sceMetadataReaderWriter13writeMetadataERKSsRKNS_8MetadataEj](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - not exported by any firmware 13.42 module, so on 13.42 an import of these NIDs resolves to nothing in the firmware; the 3.20 declarations remain for titles built against older firmware. Measured as a payload process on a device: `dlsym` on the `dlopen` handle of `libSceMetadataReaderWriter.sprx` returns null for each of these names, while the other 22 names in Export.cpp resolve.
- [_ZN23sceMetadataReaderWriter13writeMetadataERKSsRKNS_8MetadataEjPS2_, _ZN23sceMetadataReaderWriter16extractThumbnailERKSsjRNS_9ThumbnailE, _ZN23sceMetadataReaderWriter16getNumOfMimeTypeERKSsPi, _ZN23sceMetadataReaderWriter17getParserInfoListERSt6vectorINS_10ParserInfoESaIS1_EE, _ZN23sceMetadataReaderWriter18registerParserInfoERKSt6vectorINS_10ParserInfoESaIS1_EE](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - not exported by any firmware 13.42 module, so on 13.42 an import of these NIDs resolves to nothing in the firmware; the 3.20 declarations remain for titles built against older firmware. Measured as a payload process on a device: `dlsym` on the `dlopen` handle of `libSceMetadataReaderWriter.sprx` returns null for each of these names, while the other 22 names in Export.cpp resolve.
- [_ZN23sceMetadataReaderWriter8Metadata11deleteFieldERKSs, _ZN23sceMetadataReaderWriter8Metadata15iterateAllFieldEPFiRKSsRKNS_5ValueEbE, _ZN23sceMetadataReaderWriter8Metadata8getFieldEiRSsRNS_5ValueERb, _ZN23sceMetadataReaderWriter8Metadata8setFieldERKSs, _ZN23sceMetadataReaderWriter8Metadata8setFieldERKSsRKNS_5ValueE](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - not exported by any firmware 13.42 module, so on 13.42 an import of these NIDs resolves to nothing in the firmware; the 3.20 declarations remain for titles built against older firmware. Measured as a payload process on a device: `dlsym` on the `dlopen` handle of `libSceMetadataReaderWriter.sprx` returns null for each of these names, while the other 22 names in Export.cpp resolve.
- [_ZNK23sceMetadataReaderWriter8Metadata8getFieldEiRSsRNS_5ValueE, _ZNK23sceMetadataReaderWriter8Metadata8getValueERKSsRNS_5ValueE](../../../core/libs/prx/libSceMetadataReaderWriter/Export.cpp) - not exported by any firmware 13.42 module, so on 13.42 an import of these NIDs resolves to nothing in the firmware; the 3.20 declarations remain for titles built against older firmware. Measured as a payload process on a device: `dlsym` on the `dlopen` handle of `libSceMetadataReaderWriter.sprx` returns null for each of these names, while the other 22 names in Export.cpp resolve.