core/: get rid of vi

It's poorly implemented and ugly, it segfaults and doesn't compile with
-Werr. The time is now!

Signed-off-by: Ferass El Hafidi <vitali64pmemail@protonmail.com>

2 files changed, 0 insertions, 211 deletions

diff --git a/config.mk b/config.mk
index 1b70722..cb00c41 100644
--- a/config.mk
+++ b/config.mk
@@ -39,7 +39,6 @@ CORE=\
 	uname\
 	unlink\
 	wc
-	# vi\ doesn't work for now #
 
 # Include core/extra utilities in fases-box
 INCLUDE_EXTRA=n
diff --git a/core/vi.c b/core/vi.c
deleted file mode 100644
index 1943d44..0000000
--- a/core/vi.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause */
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <signal.h>
-#include <string.h>
-#include <time.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-#include <libgen.h>
-
-/*** ANSI VT100 escape codes ***/
-/*           Colors            */
-#define ANSI_WHITEBG "\33[38;5;0;48;5;255m"
-#define ANSI_RESET   "\33[m"
-/*     Other escape codes      */
-#define ANSI_CLEARLINE "\33[2K\r"
-#define ANSI_CLEARALL  "\e[1;1H\e[2J"
-
-/********** Common - used by both vi and ex **********/
-int print_string(char *string);
-
-int print_string(char *string) {
-	return write(STDOUT_FILENO, string, strlen(string));
-}
-
-/********************** ex mode **********************/
-int _ex_main(int argc, char *argv[]);
-
-int _ex_main(int argc, char *argv[]) {
-	print_string("<Not implemented>\n");
-	return 0; /* Not implemented yet. */
-}
-
-/********************** vi mode **********************/
-struct cursor_pos {
-	/* Neat way to keep track of the cursor's position. */
-	unsigned int x;
-	unsigned int y;
-};
-
-int  _vi_main(int argc, char *argv[]);
-int  _vi_set_cursor_pos(unsigned int x, unsigned int y);
-int  _vi_init(unsigned int lines, unsigned int columns, 
-		char buffer[BUFSIZ], struct cursor_pos cposition, long int offset_position, 
-		FILE *filstr);
-void _vi_printUsage();
-int _vi_print_buffer_line(char s[BUFSIZ], unsigned int numlines);
-
-int _vi_main(int argc, char *argv[]) {
-	int argument, offset;
-	char cmd;
-	FILE *filstr;
-	char buffer[BUFSIZ];
-	struct sigaction signal_action;
-	struct termios oldattr, newattr;
-	struct winsize w;
-	struct cursor_pos cposition, fposition;
-	ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
-	unsigned int lines   = w.ws_row - 1;
-	unsigned int columns = w.ws_col - 1;
-
-	while ((argument = getopt(argc, argv, "")) != -1) {
-		if (argument == '?') {
-			_vi_printUsage();
-			return 1;
-		}
-	}
-	argc -= optind;
-	argv += optind;
-
-	signal_action.sa_handler = SIG_IGN;
-	sigemptyset(&signal_action.sa_mask);
-	sigaction(SIGINT, &signal_action, NULL);
-	setvbuf(stdout, NULL, _IONBF, 0);
-	/* Initialise vi */
-	if (argv[0]) {
-		filstr = fopen(argv[0], "r+");
-		if (errno) {
-			if (errno != ENOENT)
-				return errno;
-		}
-	} _vi_init(lines, columns, buffer, cposition, offset, filstr);	
-	for (;;) {
-		/* Get a character */
-		tcgetattr(0, &oldattr); /* Get previous terminal parameters */
-		newattr = oldattr;
-		newattr.c_lflag &= ~( ICANON | ECHO ); /* Disable ECHO and ICANON */
-		tcsetattr(0, TCSANOW, &newattr); /* Set net parameters */
-		cmd = getchar();
-		switch (cmd) {
-			/*********************** Moving the cursor ***********************/
-			case 'k': /* up */
-				if (fposition.y > 0) fposition.y--;
-				else break;
-				if (cposition.y != 1)
-					_vi_set_cursor_pos(cposition.x, (cposition.y = cposition.y - 1));
-				else if (fposition.y == 0) {
-					_vi_set_cursor_pos(1, 1);
-					print_string(ANSI_CLEARALL); /* Clear screen */
-					fposition.y--; /* Say, 118 */
-					for (unsigned int i = lines - 1 /* 79 */; i > 0; i--) {
-						_vi_print_buffer_line(buffer, fposition.y - i); /* 120 - 78 */
-					}
-					_vi_set_cursor_pos(cposition.x, cposition.y);
-				}
-				break;
-			case 'j': /* down */
-				if (cposition.y != (lines - 1) && fposition.y++)
-					_vi_set_cursor_pos(cposition.x, (cposition.y = cposition.y + 1));
-				else if (cposition.y == lines - 1) {
-					_vi_set_cursor_pos(1, 1);
-					print_string(ANSI_CLEARALL); /* Clear screen */
-					fposition.y++; /* Say, 120 */
-					for (unsigned int i = lines - 1 /* 79 */; i > 0; i--) {
-						_vi_print_buffer_line(buffer, fposition.y - i); /* 120 - 78 */
-					}
-					_vi_set_cursor_pos(cposition.x, cposition.y);
-				}
-				break;
-			case 'l': /* right */
-				if (cposition.x != columns && fposition.x++)
-					_vi_set_cursor_pos((cposition.x = cposition.x + 1), cposition.y);
-				break;
-			case 'h': /* left */
-				if (cposition.x != 1 && fposition.x--)
-					_vi_set_cursor_pos((cposition.x = cposition.x - 1), cposition.y);
-				break;
-			/************************* Command mode: *************************/
-			case ':':
-				_vi_set_cursor_pos(1, lines);
-				print_string(ANSI_CLEARLINE ":");
-				tcsetattr(0, TCSANOW, &oldattr); /* Restore old parameters */
-				cmd = getchar();
-				switch (cmd) { 
-					case '\33':
-						_vi_set_cursor_pos(1, lines);
-						print_string(ANSI_CLEARLINE);
-						break;
-					case 'q':
-						print_string(ANSI_CLEARALL); /* Clear screen */
-						_vi_set_cursor_pos(1, 1); /* Reset the cursor position */
-						if (filstr) fclose(filstr);
-						return 0;
-					case '\n':
-						break;
-					default:
-						_vi_set_cursor_pos(1, lines);
-						print_string("unknown command");
-						break;
-				}
-				_vi_set_cursor_pos(cposition.x, cposition.y);
-		}
-		tcsetattr(0, TCSANOW, &oldattr); /* Restore old parameters */
-	}
-	return 0;
-}
-
-int _vi_init(unsigned int lines, unsigned int columns, 
-		char buffer[BUFSIZ], struct cursor_pos cposition, 
-		long int offset_position, FILE *filstr) {
-	int status = 0;
-	print_string(ANSI_CLEARALL); /* Clear screen */
-	_vi_set_cursor_pos(1, 1);
-	if (filstr) {
-		fread(buffer, BUFSIZ, 1, filstr);
-		//if (fgets(buffer, 4096, filstr) != NULL) {
-		//	offset_position = ftell(filstr);
-		//	fputs(buffer, stdout);
-		//}
-		for (unsigned int i = 0; i < lines - 1; i++)
-			_vi_print_buffer_line(buffer, i);
-	} else {
-		for (unsigned int i = 1; i < (lines ); i++)
-			fputs("~\n", stdout);
-		status = 2; /* No file */
-	} _vi_set_cursor_pos((cposition.x = 1), (cposition.y = 1));
-	return status;
-}
-
-int _vi_set_cursor_pos(unsigned int x, unsigned int y) {
-	return printf("\033[%u;%uH", (y), (x));
-}
-
-void _vi_printUsage() {
-	printf("Ferass' Base System. (%s)\n\n"
-	"Usage: vi [filename]\n"
-	"Visual editor.\n", VERSION);
-}
-
-int _vi_print_buffer_line(char s[BUFSIZ], unsigned int numlines) {
-	unsigned int lines_found, chars;
-	/* Search for <numlines> - 1 lines and skip them entirely. */
-	for (chars = 0, lines_found = 0; 
-			s[chars] && lines_found < numlines; s[chars] == '\n' && lines_found++, chars++)
-		/* TODO: Use strchr(). */ ;
-	/* Print the last line found. */
-	for (; s[chars] && s[chars] != '\n'; chars++) putchar((int)s[chars])
-		/* TODO: Do not print character-by-character. */ ;
-	putchar((int)'\n');
-	return 0;
-}
-
-/************ main() ************/
-int main(int argc, char *argv[]) {
-	if (!strcmp(basename(argv[0]), "ex")) return _ex_main(argc, argv);
-	else /* Default to vi */              return _vi_main(argc, argv);
-	return 0; /* Never reached. */
-}