Coding Challenge Series /
Technical Interview Series
You are writing code for an embedded system. There are some restrictions on memory
and I/O that you must follow.
Your challenge is to create a file search function. The function is provided an
ASCII string and the name of the file. The file API follows this pattern:
array = ReadFile(filename, startindex)
Notice how there isn’t a length? :) The ReadFile function returns 64
bytes at a time (as possible). You may not keep more than 64 bytes of the file in
memory at any time. (No double buffering, etc.). The data in the file is represented
as ASCII characters. Additionally, a block of memory may only be read once.
To get the file length, a function is provided:
length (integer) = FileLength(filename)
The search string may be longer than 64 characters.