PRC (Palm OS)
PRC is a container format for code databases in Palm OS, Garnet OS and Access Linux Platform. Its structure is similar to PDB databases. Usually, a PRC file is a flat representation of a Palm OS application that is stored as forked database on the PDA.
PRC files are also used by the Mobipocket e-book-reader. The AZW format of Amazon's Kindle reading device is in turn a DRM-restricted form of the Mobipocket format.
On Palm OS, PRC files are used for applications, localized resources and shared libraries.
Structure of PRC file
In its essence, a PRC file is similar to a classic Mac OS application. It contains a PRC header, PRC resource headers and PRC resources.PRC Header
The PRC header is located at the beginning of the file and contains meta-information on the file:| Offset | Name | Type | Size |
| 0x00 | name | char | 32 Bytes |
| 0x20 | flags | integer | 2 Bytes |
| 0x22 | version | integer | 2 Bytes |
| 0x24 | creation time | 32bit integer - PDB Datetime | 4 Bytes |
| 0x28 | modification time | 32bit integer - PDB Datetime | 4 Bytes |
| 0x2c | backup time | 32bit integer - PDB Datetime | 4 Bytes |
| 0x30 | mod_num | integer | 4 Bytes |
| 0x34 | app_info | integer | 4 Bytes |
| 0x38 | sort_info | integer | 4 Bytes |
| 0x3c | type | integer | 4 Bytes |
| 0x40 | creator | integer | 4 Bytes |
| 0x44 | unique_id_seed | integer | 4 Bytes |
| 0x48 | next_record_list | integer | 4 Bytes |
| 0x4c | num_records | integer | 2 Bytes |
PRC Resource Header
For every resource, there is a resource header containing:| name | type | notes | size |
| name | char | Name of the resource | 4 bytes |
| ID | integer | ID number of the resource | 2 bytes |
| offset | integer | Pointer to resource data | 4 bytes |