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
This short article presents trivial but fast and memory efficient function to compare two strings. Function returns “0” (zero) on success (strings are the same), otherwise function returns the position where different characters occurred. Example code #include <stdint.h> #include <assert.h> static int8_t xstrcmp(const char *s1, const char *s2) { while(*s1 != ‘\0’ && *s1 == … Read more
All linux binary applications have a common ELF format (Executable and Linking Format). This format consist of header and variouse sections (see ELF Specification). The ELF allows you to attach custom sections with some extra user-data. It means that you can hide some usefull information inside a binary file (like library for example). Why you … Read more
I assume, that you know what even and odd numbers are from a math perspective. However, I will refresh this knowledge just in a single sentence for a buddies who overslept that math lesson. An even number is an integer that is exactly divisible by 2 while odd number is any integer (not a fraction) … Read more