integer

Fast string to integer conversion (C/C++)

This article presents a few fast and lightweight implementations of conversion from ASCII string to integer. It can be an interesting fit to use in a small microcontrollers like for example ATtiny13, which resources are very limited. All presented functions are simplified and require a null-terminated array of chars as an argument. Convert string to … Read more

Bit-level operations – check integer is even or odd

In this short article I will exaplain how to use bit-level operations to verify that integer is even or odd. It’s very useful and fast verification. Examples below have been compiled and tested using gnu-gcc. $/> gcc example.c -o example CHECK EVEN To verify that integer is even we need to check first bit is not set. #include <stdint.h> #include <assert.h> … Read more