static void show_flag_status(void)
{
int keypress;
int flag_val;
clear_line();
bb_putchar('_');
keypress = less_getch(1);
switch (keypress) {
case 'M':
flag_val = option_mask32 & FLAG_M;
break;
case 'm':
flag_val = option_mask32 & FLAG_m;
break;
case '~':
flag_val = option_mask32 & FLAG_TILDE;
break;
case 'N':
flag_val = option_mask32 & FLAG_N;
break;
case 'E':
flag_val = option_mask32 & FLAG_E;
break;
default:
flag_val = 0;
break;
}
clear_line();
printf(HIGHLIGHT"The status of the flag is: %u"NORMAL, flag_val != 0);
}
static void colon_process(void)
{
int keypress;
/* Clear the current line and print a prompt */
print_statusline(" :");
keypress = less_getch(2);
switch (keypress) {
case 'd':
remove_current_file();
break;
case 'e':
examine_file();
break;
#if ENABLE_FEATURE_LESS_FLAGS
case 'f':
m_status_print();
break;
#endif
case 'n':
change_file(1);
break;
case 'p':
change_file(-1);
break;
case 'q':
less_exit(EXIT_SUCCESS);
break;
case 'x':
change_file(0);
break;
}
}
static void flag_change(void)
{
int keypress;
clear_line();
bb_putchar('-');
keypress = less_getch(1);
switch (keypress) {
case 'M':
option_mask32 ^= FLAG_M;
break;
case 'm':
option_mask32 ^= FLAG_m;
break;
case 'E':
option_mask32 ^= FLAG_E;
break;
case '~':
option_mask32 ^= FLAG_TILDE;
break;
case 'S':
option_mask32 ^= FLAG_S;
buffer_fill_and_print();
break;
#if ENABLE_FEATURE_LESS_LINENUMS
case 'N':
option_mask32 ^= FLAG_N;
re_wrap();
buffer_fill_and_print();
break;
#endif
}
}
int less_main(int argc, char **argv)
{
int keypress;
INIT_G();
/* TODO: -x: do not interpret backspace, -xx: tab also */
/* -xxx: newline also */
/* -w N: assume width N (-xxx -w 32: hex viewer of sorts) */
getopt32(argv, "EMmN~");
argc -= optind;
argv += optind;
num_files = argc;
files = argv;
/* Another popular pager, most, detects when stdout
* is not a tty and turns into cat. This makes sense. */
if (!isatty(STDOUT_FILENO))
return bb_cat(argv);
kbd_fd = open(CURRENT_TTY, O_RDONLY);
if (kbd_fd < 0)
return bb_cat(argv);
ndelay_on(kbd_fd);
if (!num_files) {
if (isatty(STDIN_FILENO)) {
/* Just "less"? No args and no redirection? */
bb_error_msg("missing filename");
bb_show_usage();
}
} else
filename = xstrdup(files[0]);
get_terminal_width_height(kbd_fd, &width, &max_displayed_line);
/* 20: two tabstops + 4 */
if (width < 20 || max_displayed_line < 3)
return bb_cat(argv);
max_displayed_line -= 2;
buffer = xmalloc((max_displayed_line+1) * sizeof(char *));
if (option_mask32 & FLAG_TILDE)
empty_line_marker = "";
tcgetattr(kbd_fd, &term_orig);
term_less = term_orig;
term_less.c_lflag &= ~(ICANON | ECHO);
term_less.c_iflag &= ~(IXON | ICRNL);
/*term_less.c_oflag &= ~ONLCR;*/
term_less.c_cc[VMIN] = 1;
term_less.c_cc[VTIME] = 0;
/* We want to restore term_orig on exit */
bb_signals(BB_FATAL_SIGS, sig_catcher);
reinitialize();
while (1) {
keypress = less_getch(-1); /* -1: do not position cursor */
keypress_process(keypress);
}
}
static void add_mark(void)
{
int letter;
print_statusline("Mark: ");
letter = less_getch(sizeof("Mark: ") - 1);
if (isalpha(letter)) {
/* If we exceed 15 marks, start overwriting previous ones */
if (num_marks == 14)
num_marks = 0;
mark_lines[num_marks][0] = letter;
mark_lines[num_marks][1] = cur_fline;
num_marks++;
} else {
print_statusline("Invalid mark letter");
}
}
static void goto_mark(void)
{
int letter;
int i;
print_statusline("Go to mark: ");
letter = less_getch(sizeof("Go to mark: ") - 1);
clear_line();
if (isalpha(letter)) {
for (i = 0; i <= num_marks; i++)
if (letter == mark_lines[i][0]) {
buffer_line(mark_lines[i][1]);
break;
}
if (num_marks == 14 && letter != mark_lines[14][0])
print_statusline("Mark not set");
} else
print_statusline("Invalid mark letter");
}
static void flag_change(void)
{
int keypress;
clear_line();
bb_putchar('-');
keypress = less_getch(1);
switch (keypress) {
case 'M':
option_mask32 ^= FLAG_M;
break;
case 'm':
option_mask32 ^= FLAG_m;
break;
case 'E':
option_mask32 ^= FLAG_E;
break;
case '~':
option_mask32 ^= FLAG_TILDE;
break;
}
}
int less_main(int argc, char **argv)
{
int keypress;
INIT_G();
/* TODO: -x: do not interpret backspace, -xx: tab also */
/* -xxx: newline also */
/* -w N: assume width N (-xxx -w 32: hex viewer of sorts) */
getopt32(argv, "EMmN~I" IF_FEATURE_LESS_DASHCMD("S"));
argc -= optind;
argv += optind;
num_files = argc;
files = argv;
/* Another popular pager, most, detects when stdout
* is not a tty and turns into cat. This makes sense. */
if (!isatty(STDOUT_FILENO))
return bb_cat(argv);
if (!num_files) {
if (isatty(STDIN_FILENO)) {
/* Just "less"? No args and no redirection? */
bb_error_msg("missing filename");
bb_show_usage();
}
} else {
filename = xstrdup(files[0]);
}
if (option_mask32 & FLAG_TILDE)
empty_line_marker = "";
kbd_fd = open(CURRENT_TTY, O_RDONLY);
if (kbd_fd < 0)
return bb_cat(argv);
ndelay_on(kbd_fd);
tcgetattr(kbd_fd, &term_orig);
term_less = term_orig;
term_less.c_lflag &= ~(ICANON | ECHO);
term_less.c_iflag &= ~(IXON | ICRNL);
/*term_less.c_oflag &= ~ONLCR;*/
term_less.c_cc[VMIN] = 1;
term_less.c_cc[VTIME] = 0;
get_terminal_width_height(kbd_fd, &width, &max_displayed_line);
/* 20: two tabstops + 4 */
if (width < 20 || max_displayed_line < 3)
return bb_cat(argv);
max_displayed_line -= 2;
/* We want to restore term_orig on exit */
bb_signals(BB_FATAL_SIGS, sig_catcher);
#if ENABLE_FEATURE_LESS_WINCH
signal(SIGWINCH, sigwinch_handler);
#endif
buffer = xmalloc((max_displayed_line+1) * sizeof(char *));
reinitialize();
while (1) {
#if ENABLE_FEATURE_LESS_WINCH
while (WINCH_COUNTER) {
again:
winch_counter--;
get_terminal_width_height(kbd_fd, &width, &max_displayed_line);
/* 20: two tabstops + 4 */
if (width < 20)
width = 20;
if (max_displayed_line < 3)
max_displayed_line = 3;
max_displayed_line -= 2;
free(buffer);
buffer = xmalloc((max_displayed_line+1) * sizeof(char *));
/* Avoid re-wrap and/or redraw if we already know
* we need to do it again. These ops are expensive */
if (WINCH_COUNTER)
goto again;
re_wrap();
if (WINCH_COUNTER)
goto again;
buffer_fill_and_print();
/* This took some time. Loop back and check,
* were there another SIGWINCH? */
}
#endif
keypress = less_getch(-1); /* -1: do not position cursor */
keypress_process(keypress);
}
}
static void number_process(int first_digit)
{
unsigned i;
int num;
int keypress;
char num_input[sizeof(int)*4]; /* more than enough */
num_input[0] = first_digit;
/* Clear the current line, print a prompt, and then print the digit */
clear_line();
printf(":%c", first_digit);
/* Receive input until a letter is given */
i = 1;
while (i < sizeof(num_input)-1) {
keypress = less_getch(i + 1);
if ((unsigned)keypress > 255 || !isdigit(num_input[i]))
break;
num_input[i] = keypress;
bb_putchar(keypress);
i++;
}
num_input[i] = '\0';
num = bb_strtou(num_input, NULL, 10);
/* on format error, num == -1 */
if (num < 1 || num > MAXLINES) {
buffer_print();
return;
}
/* We now know the number and the letter entered, so we process them */
switch (keypress) {
case KEYCODE_DOWN: case 'z': case 'd': case 'e': case ' ': case '\015':
buffer_down(num);
break;
case KEYCODE_UP: case 'b': case 'w': case 'y': case 'u':
buffer_up(num);
break;
case 'g': case '<': case 'G': case '>':
cur_fline = num + max_displayed_line;
read_lines();
buffer_line(num - 1);
break;
case 'p': case '%':
num = num * (max_fline / 100); /* + max_fline / 2; */
cur_fline = num + max_displayed_line;
read_lines();
buffer_line(num);
break;
#if ENABLE_FEATURE_LESS_REGEXP
case 'n':
goto_match(match_pos + num);
break;
case '/':
option_mask32 &= ~LESS_STATE_MATCH_BACKWARDS;
regex_process();
break;
case '?':
option_mask32 |= LESS_STATE_MATCH_BACKWARDS;
regex_process();
break;
#endif
}
}
