LOF
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The LOF function is used to find the length of an OPEN file in bytes, or content length of an HTTP response.
Syntax
Description
- For regular OPENed files:
- LOF returns the number of bytes in an OPENed designated fileNumber. File is empty if it returns 0.
- fileNumber is the number of the opened file. # is not required.
- Often used to determine the number of records in a RANDOM access file.
- Can also be used to avoid reading an empty file, which would create an error.
- LOF in QB64 can return up to 9 GB (9,223,372,036 bytes) file sizes.
- For HTTP handles opened using _OPENCLIENT:
Examples
- Example
- Finding the number of records in a RANDOM file using a TYPE variable.
OPEN file$ FOR RANDOM AS #1 LEN = LEN(Type_variable) NumRecords% = LOF(1) \ RecordLEN% |
- Example
- Reading the Content length of an HTTP response
$UNSTABLE:HTTP h& = _OPENCLIENT("HTTP:https://qb64phoenix.com") PRINT LOF(h&) |
See also