Return the on‐disk size of the byte range [first, last)].

Synopsis

Declared in <bdls_fdstreambuf.h>

std::streamoff
getOffset(
    char* first,
    char* last) const;

Description

Return the number of bytes that the data in the range specified by [first, last)] will fill when written to the file descriptor. Note that on Unix, or for a binary file on Windows, this value will be last ‐ first, but for on Windows in text mode, extra bytes are added when ` ` would be written to the file descriptor as `r `.

Return Value

the on‐disk byte count for the range [first, last)]

Parameters

Name

Description

first

beginning of the character range

last

end of the character range (exclusive)

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