Hi,
I am writing a driver for Arduino so that Linux command it. Arduion must analyze commands like: @Maxxxxbyyyyczzzz
where x, y, and z are integer place holders and a, b and c are sub-command characters.
I have problem of investigating the array for numbers. Testing the first char is easy, well, if(someArray[0]=='@'), but when it comes to extracting x-numbers for instance, I still get headache.
I'm wondering what strategy is the most efficient, but have this trivial solution:
using "char *strchr(const char *, int);" locate 'a', register index
using the same function again, locate 'b', register index
define a new array with the length between registered indexes
fill that array and convert it with atoi() function to integer.
I'm wondering what strategy is the most efficient, but have this trivial solution:
using "char *strchr(const char *, int);" locate 'a', register index
using the same function again, locate 'b', register index
define a new array with the length between registered indexes
fill that array and convert it with atoi() function to integer.
That is a perfectly reasonable way to parse the array. The strtok function might be easier to use, though, as it does a lot of that stuff for you (find the next occurrence of a delimiter, allocate the array, and fill it).
If you go with your approach, don't forget to deal with the situations where b is not found and where a and b are adjacent to each other (i.e. the value is a zero length string).
The String class would also make some of the tasks easier (finding a position, allocating a substring).
