This is probably a no-brainer to most of the DUG members, especially those used
to pointers ...
I need to read and extract data from a binary file which comprises:
- a header with character type strings, each terminated by CR LF (not nulls)
- binary data area with a mixture of byte types, word types and double word
types
- a file terminator of 0xFFFF hex
The files are not huge, less than 500KB, as the structure originates from old
memory-constrained microprocessors of the 80's.
The header looks like it is based on the old INI file format and is of the form:
[Header]
Created=1349233072
Title=
Type=D
Version=162
[End]
The binary data area follows next. It comprises different types of data
blocks, with sub blocks, each of which contains either bytes, words or double
words of data in a pre-defined pattern or structure depending on the type of
data block.
I can read the file into a buffer (array of Char) but I currently have a
chunk of somewhat ugly code to parse the header and find the start
position of the binary data after the '[End] CR LF' string. After that I need
to extract data of various types depending on the specified datablock types,
which I though I might have to use pointers for.
What's the best approach for
a) Extracting the header strings - is there a Delphi function to extract CR LF
terminated character sequences as strings and maintain a pointer to the end of
the string?
b) Creating functions for ReadByte, ReadWord, ReadDoubleWord and incrementing
the pointer appropriately in each case ?
Eric
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