C – ronny-mueller.com

23 Feb 2020

[Howto] save invalid bytes / characters in UTF-8 encoded database

by rm | posted in: computer | 0

situation:images are binary coded. If you try to interpret/decode them as UTF-8, they can contain UTF-8 invalid characters (e.g. 0xFF) problem:if your database uses the UTF-8 encoding, you can’t save this invalid bytes in this database. (“invalid byte sequence warning”) … Continued

18 Dec 2017

[Howto] IPv4 TCP communication in C (minimal example)

by rm | posted in: computer | 0

the server-program sends the string “TestTestTest”. the client-programm receives the string and prints it on terminal. server-program: #include <unistd.h> #include <stdio.h> #include <string.h> #include <sys/socket.h> #include <netinet/in.h> int main(int argc, char *argv[]) { int listenfd = 0; int connfd … Continued