Parsing strings that contain raw and ascii
I know this is for C++, nevertheless I 'm asking for some hints regarding C.
I have a string that always has the length of the next section in raw hex and then the following section as ASCII chars:
03 53 65 63 74 31 02 31 32 ...
3 bytes, Sect1
2 bytes 12
I am looking for an easy way to parse this, I need the ASCII strings or if it contains a number like the 12 above, the 12 as int.
Just to clarify the example you gave - does the file contain this as a text?
So character 0, character 3, space... or these are actual single byte values? 3, 53, 65 ... ?
These are single byte values.
Ok, so the process is simple:
fread() a byte
allocate a buffer of size read previously
fread() to that buffer
use strtol() and errno() to check if it's a number
do something with result*
free() the buffer
repeat until end of file is reached
The real question is in what kind of structure do you want to put in the result or do you even want that at all.
That gravely depends on what the data is and what do you want to do with it.