70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#define println() printf("\n")
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#define printsep(sep) printf("%s\n", sep)
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static char *separation_character_line(const char *separation_character, const unsigned short terminal_width) {
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const unsigned short line_length = terminal_width / 3;
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const size_t character_length = strlen(separation_character);
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char *line = malloc(line_length * sizeof(char));
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// Avoiding undefined behaviour with strlen if no null byte is
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// present at the end of line
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*line = 0;
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while (strlen(line) + character_length <= line_length) {
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strncat(line, separation_character, character_length);
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}
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return line;
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}
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static unsigned short terminal_width() {
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struct winsize w;
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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return w.ws_col;
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}
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int main(int argc, char *argv[]) {
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// Parsing arguments
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char *name;
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char *separation_character;
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if (argc >= 2) {
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name = argv[1];
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} else {
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name = "";
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}
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if (argc >= 3 && *argv[2] != 0) {
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separation_character = argv[2];
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} else {
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separation_character = "=";
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}
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// Creating a /3 terminal size character line
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char *separation_line = separation_character_line(separation_character, terminal_width());
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// Printing the separator
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println();
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printsep(separation_line);
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if (name != NULL) {
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printf("\t%s\n", name);
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} else {
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println();
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}
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printsep(separation_line);
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// Freeing the created character line
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free(separation_line);
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// Returning with success
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return EXIT_SUCCESS;
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}
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