Function concat

contents/huffman_encoding/code/c/huffman.c:41–46

The two concat functions are horribly inefficient */

/* The two concat functions are horribly inefficient */
void concat(char** dst, const char* src) {
    size_t dst_len = strlen(*dst);
    size_t src_len = strlen(src);
    *dst = realloc(*dst, src_len + dst_len + 1);
    strcat(*dst, src);
}

void concat_char(char** dst, char c) {
    size_t len = strlen(*dst);