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#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include <math.h>
#include <ncurses.h>
#define LINE_LEN 0x10
// int screen_height, screen_width;
struct screen {
WINDOW *lineno, *hex, *chr;
int top_address;
void *mem;
size_t mem_len;
int hx, hy;
} screen = {
.hx = -1, .hy = -1,
};
void draw_lines() {
for (int y = 0; y < LINES; y++) {
mvwprintw(screen.lineno, y, 0, "%08x:", screen.top_address + y * LINE_LEN);
wrefresh(screen.lineno);
}
}
void draw_hex() {
for (int y = 0; y < LINES; y++) {
for (int x = 0; x < LINE_LEN; x++) {
if (screen.hy == y && screen.hx == x) {
wattron(screen.hex, A_REVERSE);
}
mvwprintw(screen.hex, y, x * 2 + (x/2), "%02x",
0xFF & ((char*) screen.mem)[screen.top_address + y * LINE_LEN + x]);
if (screen.hy == y && screen.hx == x) {
wattroff(screen.hex, A_REVERSE);
}
}
wrefresh(screen.hex);
}
}
void draw_chr() {
for (int y = 0; y < LINES; y++) {
for (int x = 0; x < LINE_LEN; x++) {
if (screen.hy == y && screen.hx == x) {
wattron(screen.chr, A_REVERSE);
}
char c = ((char*) screen.mem)[screen.top_address + y * LINE_LEN + x];
mvwprintw(screen.chr, y, x, "%c", isprint(c) ? c : '.');
if (screen.hy == y && screen.hx == x) {
wattroff(screen.chr, A_REVERSE);
}
}
wrefresh(screen.chr);
}
}
void draw_screen() {
draw_lines();
draw_hex();
draw_chr();
/* TODO end at end of file */
}
int main() {
/* Terminal supporting mouse movements */
setenv("TERM", "xterm-1003", true);
initscr();
clear();
noecho();
cbreak();
curs_set(0);
start_color();
// getmaxyx(stdscr, screen_height, screen_width);
keypad(stdscr, true);
screen.lineno = newwin(0, 10, 0, 0);
screen.hex = newwin(0, (int) ceil(LINE_LEN * 2.5), 0, 10);
screen.chr = newwin(0, LINE_LEN, 0, 10 + (int) ceil(LINE_LEN * 2.5));
int fd = open("payload.gz", O_RDONLY);
struct stat statbuf;
if (fstat(fd, &statbuf) == -1) {
goto end;
}
screen.mem_len = statbuf.st_size;
screen.mem = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
mousemask(ALL_MOUSE_EVENTS|REPORT_MOUSE_POSITION, NULL);
refresh();
draw_screen();
int ch;
MEVENT event;
while (1) {
ch = wgetch(stdscr);
switch (ch) {
case KEY_MOUSE:
wmove(stdscr, 0, 0);
switch (getmouse(&event)) {
case OK:
if (event.bstate & BUTTON4_PRESSED) {
screen.top_address -= LINE_LEN;
}
if (event.bstate & BUTTON5_PRESSED) {
screen.top_address += LINE_LEN;
}
if (event.x >= 10 && event.x < 10 + (int) ceil(LINE_LEN * 2.5)) {
screen.hx = (int) ((event.x - 10) / 2.5);
screen.hy = event.y;
} else if (event.x >= 10 + (int) ceil(LINE_LEN * 2.5) && event.x < (int) ceil(LINE_LEN * 2.5) + 10 + LINE_LEN) {
screen.hx = event.x - (10 + (int) ceil(LINE_LEN * 2.5));
screen.hy = event.y;
} else {
screen.hx = -1;
screen.hy = -1;
}
draw_screen();
break;
case ERR:
// wprintw(win, "err");
break;
}
draw_screen();
refresh();
break;
case KEY_RESIZE:
wresize(screen.lineno, LINES, 0);
wresize(screen.hex, LINES, 0);
wresize(screen.chr, LINES, 0);
draw_screen();
mvprintw(0, 0, "%ix%i", COLS, LINES);
refresh();
break;
case KEY_ENTER:
goto end;
}
}
end:
munmap(screen.mem, 0);
delwin(screen.lineno);
delwin(screen.hex);
delwin(screen.chr);
endwin();
return 0;
}
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