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PxIOKeyRead |
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Reads the record associated with the given key from the specified file
int PxIOKeyRead(PxIOFileHandle handle, RecordInfo *record, KeyInfo *key, int keyNumber, PxIOReadType readType);
Where:
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handle |
The handle of an open keyed file |
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record |
Pointer to a RecordInfo structure. When the function returns, this structure will contain a pointer to the requested record's contents and the record's size. |
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key |
Pointer to a KeyInfo structure containing key information corresponding to the record to read |
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keyNumber |
The key number used to specify whether the specified key is the primary key or one of the alternate keys (if any). If the value passed is -1, then the key sequence will be based on the one previously used with the file handle. The initial key sequence of a file will be the primary sequence. |
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readType |
Determines the behavior of the function with respect to other users. See Appendix C for more information on this option. |
If the function succeeds, a value of PXIO_SUCCESS_STATUS is returned; otherwise, an error value is returned. More information on the nature of the error can be found by calling PxIOGetError.