Renamed the files
modified: Makefile modified: README.md renamed: src/nms.c -> src/main.c renamed: src/libnms.c -> src/nms.c renamed: src/libnms.h -> src/nms.h modified: src/sneakers.c
This commit is contained in:
Brian Barto
parent
4d7706c907
commit
1c65c9a218
4
Makefile
4
Makefile
@ -20,10 +20,10 @@ CFLAGS ?= -Wextra -Wall
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EXES = nms sneakers
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EXES = nms sneakers
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all: $(EXES)
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all: $(EXES)
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nms: $(OBJ)/libnms.o $(OBJ)/nms.o | $(BIN)
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nms: $(OBJ)/nms.o $(OBJ)/main.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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sneakers: $(OBJ)/libnms.o $(OBJ)/sneakers.o | $(BIN)
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sneakers: $(OBJ)/nms.o $(OBJ)/sneakers.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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$(OBJ)/%.o: $(SRC)/%.c | $(OBJ)
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$(OBJ)/%.o: $(SRC)/%.c | $(OBJ)
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10
README.md
10
README.md
@ -70,6 +70,7 @@ enjoy the magic. In the below examples, I use a simple directory listing.
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ls -l | nms
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ls -l | nms
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ls -l | nms -a // Set auto-decrypt flag
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ls -l | nms -a // Set auto-decrypt flag
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ls -l | nms -f green // Set foreground color to green
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ls -l | nms -f green // Set foreground color to green
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ls -l | nms -r 123456 // Set return options
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ls -l | nms -c // Clear screen
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ls -l | nms -c // Clear screen
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nms -v // Display version
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nms -v // Display version
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```
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```
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@ -85,12 +86,19 @@ sequence. This is how the decryption functionality is depicted in the movie.
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Set the auto-decrypt flag. This will automatically start the
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Set the auto-decrypt flag. This will automatically start the
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decryption sequence without requiring a key press.
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decryption sequence without requiring a key press.
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`-f color`
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`-f <color>`
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Set the foreground color of the decrypted text to the color
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Set the foreground color of the decrypted text to the color
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specified. Valid options are white, yellow, black, magenta, blue, green,
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specified. Valid options are white, yellow, black, magenta, blue, green,
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or red. This is blue by default.
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or red. This is blue by default.
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`-r <options>`
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Sets the character options that `nms` requires the user to choose from
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before it terminates execution. This is intended to be used for cases
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where the data piped to `nms` contains a menu with a set of options. Note
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that `nms` will print the selection to stdout before terminating.
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`-c`
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`-c`
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Clear the screen prior to printing any output. Specifically,
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Clear the screen prior to printing any output. Specifically,
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638
src/libnms.c
638
src/libnms.c
@ -1,638 +0,0 @@
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/*
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* Copyright (c) 2016 Brian Barto
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the MIT License. See LICENSE for more details.
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*/
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/*
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* DESCRIPTION
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*
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* The libnms library encapsulates the functuionality required to produce the
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* famous "decrypting text" sceen effect from the 1992 hacker movie "Sneakers".
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* For more, go to: https://github.com/bartobri/libnms
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*/
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#define _XOPEN_SOURCE 700
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <ctype.h>
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#include <stdbool.h>
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#include <time.h>
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#include <locale.h>
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#include <wchar.h>
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#include "libnms.h"
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// Color identifiers
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#define COLOR_BLACK 0
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#define COLOR_RED 1
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#define COLOR_GREEN 2
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#define COLOR_YELLOW 3
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#define COLOR_BLUE 4
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#define COLOR_MAGENTA 5
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#define COLOR_CYAN 6
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#define COLOR_WHITE 7
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// Macros for VT100 codes
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#define CLEAR_SCR() printf("\033[2J") // Clear Screen
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#define CURSOR_HOME() printf("\033[H") // Move cursor to home position (0,0)
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#define CURSOR_MOVE(x,y) printf("\033[%i;%iH", x, y) // Move cursor to x,y
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#define BEEP() printf("\a"); // terminal bell
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#define BOLD() printf("\033[1m") // Cursor bold
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#define FOREGROUND_COLOR(x) printf("\033[3%im", x) // Set foreground color
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#define CLEAR_ATTR() printf("\033[0m") // Clear bold/color attributes
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#define SCREEN_SAVE() printf("\033[?47h") // Save screen display
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#define SCREEN_RESTORE() printf("\033[?47l") // Restore screen to previously saved state
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#define CURSOR_SAVE() printf("\033[s") // Save cursor position
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#define CURSOR_RESTORE() printf("\033[u") // Restore cursor position
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#define CURSOR_HIDE() printf("\033[?25l") // Hide cursor
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#define CURSOR_SHOW() printf("\033[?25h") // Unhide cursor
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// Program settings
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#define TYPE_EFFECT_SPEED 4 // miliseconds per char
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#define JUMBLE_SECONDS 2 // number of seconds for jumble effect
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#define JUMBLE_LOOP_SPEED 35 // miliseconds between each jumble
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#define REVEAL_LOOP_SPEED 50 // miliseconds between each reveal loop
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#define MASK_CHAR_COUNT 218 // Total characters in maskCharTable[] array.
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// Character attribute structure, linked list. Keeps track of every
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// character's attributes required for rendering and decryption effect.
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struct charAttr {
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char *source;
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char *mask;
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int width;
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int is_space;
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int time;
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struct charAttr *next;
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};
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// Static function prototypes
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static void nms_sleep(int);
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static int nms_term_rows(void);
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static int nms_term_cols(void);
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static void nms_set_terminal(int s);
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static void nms_clear_input(void);
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static char nms_get_char(void);
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static int nms_get_cursor_row(void);
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// NMS settings
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static int foregroundColor = COLOR_BLUE; // Foreground color setting
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static char *returnOpts = NULL; // Return option setting
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static int autoDecrypt = 0; // Auto-decrypt flag
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static int clearScr = 0; // clearScr flag
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static int colorOn = 1; // Terminal color flag
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static int inputPositionX = -1; // X coordinate for input position
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static int inputPositionY = -1; // Y coordinate for input position
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// Character table representing the character set know as CP437 used by
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// the original IBM PC - https://en.wikipedia.org/wiki/Code_page_437
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static char *maskCharTable[] = {
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"!", "\"", "#", "$", "%", "&", "'", "(", ")", "*", "+", ",", "-", "~",
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".", "/", ":", ";", "<", "=", ">", "?", "[", "\\", "]", "_", "{", "}",
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"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
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"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
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"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
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"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
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"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
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"\xc3\x87", "\xc3\xbc", "\xc3\xa9", "\xc3\xa2", "\xc3\xa4", "\xc3\xa0",
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"\xc3\xa5", "\xc3\xa7", "\xc3\xaa", "\xc3\xab", "\xc3\xa8", "\xc3\xaf",
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"\xc3\xae", "\xc3\xac", "\xc3\x84", "\xc3\x85", "\xc3\x89", "\xc3\xa6",
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"\xc3\x86", "\xc3\xb4", "\xc3\xb6", "\xc3\xb2", "\xc3\xbb", "\xc3\xb9",
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"\xc3\xbf", "\xc3\x96", "\xc3\x9c", "\xc2\xa2", "\xc2\xa3", "\xc2\xa5",
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"\xc6\x92", "\xc3\xa1", "\xc3\xad", "\xc3\xb3", "\xc3\xba", "\xc3\xb1",
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"\xc3\x91", "\xc2\xaa", "\xc2\xba", "\xc2\xbf", "\xc2\xac", "\xc2\xbd",
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"\xc2\xbc", "\xc2\xa1", "\xc2\xab", "\xc2\xbb", "\xce\xb1", "\xc3\x9f",
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"\xce\x93", "\xcf\x80", "\xce\xa3", "\xcf\x83", "\xc2\xb5", "\xcf\x84",
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"\xce\xa6", "\xce\x98", "\xce\xa9", "\xce\xb4", "\xcf\x86", "\xce\xb5",
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"\xc2\xb1", "\xc3\xb7", "\xc2\xb0", "\xc2\xb7", "\xc2\xb2", "\xc2\xb6",
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"\xe2\x8c\x90", "\xe2\x82\xa7", "\xe2\x96\x91", "\xe2\x96\x92",
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"\xe2\x96\x93", "\xe2\x94\x82", "\xe2\x94\xa4", "\xe2\x95\xa1",
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"\xe2\x95\xa2", "\xe2\x95\x96", "\xe2\x95\x95", "\xe2\x95\xa3",
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"\xe2\x95\x91", "\xe2\x95\x97", "\xe2\x95\x9d", "\xe2\x95\x9c",
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"\xe2\x95\x9b", "\xe2\x94\x90", "\xe2\x94\x94", "\xe2\x94\xb4",
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"\xe2\x94\xac", "\xe2\x94\x9c", "\xe2\x94\x80", "\xe2\x94\xbc",
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"\xe2\x95\x9e", "\xe2\x95\x9f", "\xe2\x95\x9a", "\xe2\x95\x94",
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"\xe2\x95\xa9", "\xe2\x95\xa6", "\xe2\x95\xa0", "\xe2\x95\x90",
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"\xe2\x95\xac", "\xe2\x95\xa7", "\xe2\x95\xa8", "\xe2\x95\xa4",
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"\xe2\x95\xa7", "\xe2\x95\x99", "\xe2\x95\x98", "\xe2\x95\x92",
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"\xe2\x95\x93", "\xe2\x95\xab", "\xe2\x95\xaa", "\xe2\x94\x98",
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"\xe2\x94\x8c", "\xe2\x96\x88", "\xe2\x96\x84", "\xe2\x96\x8c",
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"\xe2\x96\x90", "\xe2\x96\x80", "\xe2\x88\x9e", "\xe2\x88\xa9",
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"\xe2\x89\xa1", "\xe2\x89\xa5", "\xe2\x89\xa4", "\xe2\x8c\xa0",
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"\xe2\x8c\xa1", "\xe2\x89\x88", "\xe2\x88\x99", "\xe2\x88\x9a",
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"\xe2\x81\xbf", "\xe2\x96\xa0"
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};
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/*
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* nms_exec() - This function is passed a pointer to a character string
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* and displays the contents of the string in a way that mimicks the
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* "decrypting text" effect in the 1992 movie Sneakers. It returns the
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* last character pressed by the user.
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*/
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char nms_exec(char *string) {
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struct charAttr *list_pointer = NULL;
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struct charAttr *list_head = NULL;
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struct charAttr *list_temp = NULL;
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int i, revealed = 0;
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int maxRows, maxCols, curRow, curCol, origRow = 0, origCol = 0;
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char ret = 0;
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// Error if we have an empty string.
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if (string == NULL || string[0] == '\0') {
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fprintf(stderr, "Error. Empty string.\n");
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return 0;
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}
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// Reassociate STDIN to the terminal is needed
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if (!isatty(STDIN_FILENO) && !freopen ("/dev/tty", "r", stdin)) {
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fprintf(stderr, "Error. Can't associate STDIN with terminal.\n");
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return 0;
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}
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// Turn off terminal echo and line buffering
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nms_set_terminal(0);
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// Needed for UTF-8 support
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setlocale(LC_ALL, "");
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// Get terminal window rows/cols
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maxRows = nms_term_rows();
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maxCols = nms_term_cols();
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// Seed my random number generator with the current time
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srand(time(NULL));
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// Get cursor position if we are not clearing the screen
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if (!clearScr) {
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origRow = nms_get_cursor_row();
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// nms_get_cursor_row() may display output in some terminals. So
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// we need to reposition the cursor to the start of the row.
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CURSOR_MOVE(origRow, origCol);
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}
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// Assign current row/col positions
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curRow = origRow;
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curCol = origCol;
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// Geting input
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for (i = 0; string[i] != '\0'; ++i) {
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// Don't go beyond maxRows
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if (curRow - origRow >= maxRows - 1) {
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break;
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}
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// Allocate memory for next list link
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if (list_pointer == NULL) {
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list_pointer = malloc(sizeof(struct charAttr));
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list_head = list_pointer;
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} else {
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list_pointer->next = malloc(sizeof(struct charAttr));
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list_pointer = list_pointer->next;
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}
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// Get character's byte-length and store character.
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if (mblen(&string[i], 4) > 0) {
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list_pointer->source = malloc(mblen(&string[i], 4) + 1);
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strncpy(list_pointer->source, &string[i], mblen(&string[i], 4));
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list_pointer->source[mblen(&string[i], 4)] = '\0';
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i += (mblen(&string[i], 4) - 1);
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} else {
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fprintf(stderr, "Unknown character encountered. Quitting.\n");
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nms_set_terminal(1);
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return 0;
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}
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// Set flag if we have a whitespace character
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if (strlen(list_pointer->source) == 1 && isspace(list_pointer->source[0]))
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list_pointer->is_space = 1;
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else
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list_pointer->is_space = 0;
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// Set initial mask chharacter
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list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
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// Set reveal time
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list_pointer->time = rand() % 5000;
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// Set character column width
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wchar_t widec[sizeof(list_pointer->source)] = {};
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mbstowcs(widec, list_pointer->source, sizeof(list_pointer->source));
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list_pointer->width = wcwidth(*widec);
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// Set next node to null
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list_pointer->next = NULL;
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// Track row count
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if (string[i] == '\n' || (curCol += list_pointer->width) > maxCols) {
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curCol = 0;
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curRow++;
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if (curRow == maxRows + 1 && origRow > 0) {
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origRow--;
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curRow--;
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}
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}
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}
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// Save terminal state, clear screen, and home/hide the cursor
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if (clearScr) {
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CURSOR_SAVE();
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SCREEN_SAVE();
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CLEAR_SCR();
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CURSOR_HOME();
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CURSOR_HIDE();
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}
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// Print mask characters with 'type effect'
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for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
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// Print mask character (or space)
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if (list_pointer->is_space) {
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printf("%s", list_pointer->source);
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continue;
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}
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// print mask character
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printf("%s", list_pointer->mask);
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if (list_pointer->width == 2) {
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printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
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}
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// flush output and sleep
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fflush(stdout);
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nms_sleep(TYPE_EFFECT_SPEED);
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}
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|
|
||||||
// Flush any input up to this point
|
|
||||||
nms_clear_input();
|
|
||||||
|
|
||||||
// If autoDecrypt flag is set, we sleep. Otherwise require user to
|
|
||||||
// press a key to continue.
|
|
||||||
if (autoDecrypt)
|
|
||||||
sleep(1);
|
|
||||||
else
|
|
||||||
nms_get_char();
|
|
||||||
|
|
||||||
// Jumble loop
|
|
||||||
for (i = 0; i < (JUMBLE_SECONDS * 1000) / JUMBLE_LOOP_SPEED; ++i) {
|
|
||||||
|
|
||||||
// Move cursor to home position
|
|
||||||
if (clearScr) {
|
|
||||||
CURSOR_HOME();
|
|
||||||
} else {
|
|
||||||
CURSOR_MOVE(origRow, origCol);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Print new mask for all characters
|
|
||||||
for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
|
|
||||||
|
|
||||||
// Print mask character (or space)
|
|
||||||
if (list_pointer->is_space) {
|
|
||||||
printf("%s", list_pointer->source);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
// print new mask character
|
|
||||||
printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
|
|
||||||
if (list_pointer->width == 2) {
|
|
||||||
printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// flush output and sleep
|
|
||||||
fflush(stdout);
|
|
||||||
nms_sleep(JUMBLE_LOOP_SPEED);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Reveal loop
|
|
||||||
while (!revealed) {
|
|
||||||
|
|
||||||
// Move cursor to home position
|
|
||||||
if (clearScr) {
|
|
||||||
CURSOR_HOME();
|
|
||||||
} else {
|
|
||||||
CURSOR_MOVE(origRow, origCol);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Set revealed flag
|
|
||||||
revealed = 1;
|
|
||||||
|
|
||||||
for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
|
|
||||||
|
|
||||||
// Print mask character (or space)
|
|
||||||
if (list_pointer->is_space) {
|
|
||||||
printf("%s", list_pointer->source);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
// If we still have time before the char is revealed, display the mask
|
|
||||||
if (list_pointer->time > 0) {
|
|
||||||
|
|
||||||
// Change the mask randomly
|
|
||||||
if (list_pointer->time < 500) {
|
|
||||||
if (rand() % 3 == 0) {
|
|
||||||
list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if (rand() % 10 == 0) {
|
|
||||||
list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Print mask
|
|
||||||
printf("%s", list_pointer->mask);
|
|
||||||
|
|
||||||
// Decrement reveal time
|
|
||||||
list_pointer->time -= REVEAL_LOOP_SPEED;
|
|
||||||
|
|
||||||
// Unset revealed flag
|
|
||||||
revealed = 0;
|
|
||||||
} else {
|
|
||||||
|
|
||||||
// Set bold and foreground color for character reveal
|
|
||||||
BOLD();
|
|
||||||
if (colorOn) {
|
|
||||||
FOREGROUND_COLOR(foregroundColor);
|
|
||||||
}
|
|
||||||
|
|
||||||
// print source character
|
|
||||||
printf("%s", list_pointer->source);
|
|
||||||
|
|
||||||
// Unset foreground color
|
|
||||||
CLEAR_ATTR();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// flush output and sleep
|
|
||||||
fflush(stdout);
|
|
||||||
nms_sleep(REVEAL_LOOP_SPEED);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Flush any input up to this point
|
|
||||||
nms_clear_input();
|
|
||||||
|
|
||||||
// Check if user must select from a set of options
|
|
||||||
if (returnOpts != NULL && strlen(returnOpts) > 0) {
|
|
||||||
|
|
||||||
// Position cursor if necessary
|
|
||||||
if (inputPositionY >= 0 && inputPositionX >= 0) {
|
|
||||||
CURSOR_MOVE(inputPositionY, inputPositionX);
|
|
||||||
}
|
|
||||||
|
|
||||||
CURSOR_SHOW();
|
|
||||||
|
|
||||||
// Get and validate user selection
|
|
||||||
while (strchr(returnOpts, ret = nms_get_char()) == NULL) {
|
|
||||||
BEEP();
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// User must press a key to continue when clearSrc is set
|
|
||||||
// without returnOpts
|
|
||||||
else if (clearScr) {
|
|
||||||
nms_get_char();
|
|
||||||
}
|
|
||||||
|
|
||||||
// Restore screen and cursor is clearSrc is set
|
|
||||||
if (clearScr) {
|
|
||||||
SCREEN_RESTORE();
|
|
||||||
CURSOR_SHOW();
|
|
||||||
CURSOR_RESTORE();
|
|
||||||
}
|
|
||||||
|
|
||||||
// Turn on terminal echo and line buffering
|
|
||||||
nms_set_terminal(1);
|
|
||||||
|
|
||||||
// Freeing the list.
|
|
||||||
list_pointer = list_head;
|
|
||||||
while (list_pointer != NULL) {
|
|
||||||
list_temp = list_pointer;
|
|
||||||
list_pointer = list_pointer->next;
|
|
||||||
free(list_temp->source);
|
|
||||||
free(list_temp);
|
|
||||||
}
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_foreground_color() sets the foreground color of the unencrypted
|
|
||||||
* characters as they are revealed to the color indicated by the 'color'
|
|
||||||
* argument. Valid arguments are "white", "yellow", "magenta", "blue",
|
|
||||||
* "green", "red", and "cyan". This function will default to blue if
|
|
||||||
* passed an invalid color. No value is returned.
|
|
||||||
*/
|
|
||||||
void nms_set_foreground_color(char *color) {
|
|
||||||
|
|
||||||
if(strcmp("white", color) == 0)
|
|
||||||
foregroundColor = COLOR_WHITE;
|
|
||||||
else if(strcmp("yellow", color) == 0)
|
|
||||||
foregroundColor = COLOR_YELLOW;
|
|
||||||
else if(strcmp("black", color) == 0)
|
|
||||||
foregroundColor = COLOR_BLACK;
|
|
||||||
else if(strcmp("magenta", color) == 0)
|
|
||||||
foregroundColor = COLOR_MAGENTA;
|
|
||||||
else if(strcmp("blue", color) == 0)
|
|
||||||
foregroundColor = COLOR_BLUE;
|
|
||||||
else if(strcmp("green", color) == 0)
|
|
||||||
foregroundColor = COLOR_GREEN;
|
|
||||||
else if(strcmp("red", color) == 0)
|
|
||||||
foregroundColor = COLOR_RED;
|
|
||||||
else if(strcmp("cyan", color) == 0)
|
|
||||||
foregroundColor = COLOR_CYAN;
|
|
||||||
else
|
|
||||||
foregroundColor = COLOR_BLUE;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_return_opts() takes a character sting and copies it to the
|
|
||||||
* returnOpts setting used by nms_exec().
|
|
||||||
*/
|
|
||||||
void nms_set_return_opts(char *opts) {
|
|
||||||
returnOpts = realloc(returnOpts, strlen(opts) + 1);
|
|
||||||
strcpy(returnOpts, opts);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_auto_decrypt() sets the autoDecrypt flag according to the
|
|
||||||
* true/false value of the 'setting' argument.
|
|
||||||
*/
|
|
||||||
void nms_set_auto_decrypt(int setting) {
|
|
||||||
if (setting)
|
|
||||||
autoDecrypt = 1;
|
|
||||||
else
|
|
||||||
autoDecrypt = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_clear_scr() sets the clearScr flag according to the
|
|
||||||
* true/false value of the 'setting' argument.
|
|
||||||
*/
|
|
||||||
void nms_set_clear_scr(int setting) {
|
|
||||||
if (setting)
|
|
||||||
clearScr = 1;
|
|
||||||
else
|
|
||||||
clearScr = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_color() sets the colorOn flag according to the
|
|
||||||
* true/false value of the 'setting' argument.
|
|
||||||
*/
|
|
||||||
void nms_use_color(int setting) {
|
|
||||||
if (setting)
|
|
||||||
colorOn = 1;
|
|
||||||
else
|
|
||||||
colorOn = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_input_position() sets the desired coordinate of the cursor in
|
|
||||||
* the terminal when accepting user input after nms_exec() reveals the
|
|
||||||
* unencrypted characters.
|
|
||||||
*/
|
|
||||||
void nms_set_input_position(int x, int y) {
|
|
||||||
if (x >= 0 && y >= 0) {
|
|
||||||
inputPositionX = x;
|
|
||||||
inputPositionY = y;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_sleep() sleeps for the number of miliseconds indicated by 't'.
|
|
||||||
*/
|
|
||||||
static void nms_sleep(int t) {
|
|
||||||
struct timespec ts;
|
|
||||||
|
|
||||||
ts.tv_sec = t / 1000;
|
|
||||||
ts.tv_nsec = (t % 1000) * 1000000;
|
|
||||||
|
|
||||||
nanosleep(&ts, NULL);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_term_rows() gets and returns the number of rows in the current
|
|
||||||
* terminal window.
|
|
||||||
*/
|
|
||||||
static int nms_term_rows(void) {
|
|
||||||
struct winsize w;
|
|
||||||
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
|
|
||||||
|
|
||||||
return w.ws_row;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_term_cols() gets and returns the number of cols in the current
|
|
||||||
* terminal window.
|
|
||||||
*/
|
|
||||||
static int nms_term_cols(void) {
|
|
||||||
struct winsize w;
|
|
||||||
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
|
|
||||||
|
|
||||||
return w.ws_col;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_set_terminal() turns off terminal echo and line buffering when
|
|
||||||
* passed an integer value that evaluates to true. It restores the
|
|
||||||
* original terminal values when passed an integer value that evaluates
|
|
||||||
* to false.
|
|
||||||
*/
|
|
||||||
static void nms_set_terminal(int s) {
|
|
||||||
struct termios tp;
|
|
||||||
static struct termios save;
|
|
||||||
static int state = 1;
|
|
||||||
|
|
||||||
if (s == 0) {
|
|
||||||
if (tcgetattr(STDIN_FILENO, &tp) == -1) {
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
save = tp;
|
|
||||||
|
|
||||||
tp.c_lflag &=(~ICANON & ~ECHO);
|
|
||||||
|
|
||||||
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &tp) == -1) {
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if (state == 0 && tcsetattr(STDIN_FILENO, TCSANOW, &save) == -1)
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
state = s;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_clear_input() clears the input buffer of all characters up to
|
|
||||||
* the EOF character.
|
|
||||||
*/
|
|
||||||
static void nms_clear_input(void) {
|
|
||||||
int i;
|
|
||||||
|
|
||||||
ioctl(STDIN_FILENO, FIONREAD, &i);
|
|
||||||
|
|
||||||
while (i > 0) {
|
|
||||||
getchar();
|
|
||||||
--i;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_get_char() returns the next character in the input buffer. In the
|
|
||||||
* case of an EOF character, it blocks until the user presses a key.
|
|
||||||
*/
|
|
||||||
static char nms_get_char(void) {
|
|
||||||
struct timespec ts;
|
|
||||||
int t = 50;
|
|
||||||
char c;
|
|
||||||
|
|
||||||
ts.tv_sec = t / 1000;
|
|
||||||
ts.tv_nsec = (t % 1000) * 1000000;
|
|
||||||
|
|
||||||
while ((c = getchar()) == EOF) {
|
|
||||||
nanosleep(&ts, NULL);
|
|
||||||
}
|
|
||||||
|
|
||||||
return c;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* nms_get_cursor_row() returns the row position of the cursor as reported
|
|
||||||
* by the terminal program via the ANSI escape code
|
|
||||||
*/
|
|
||||||
static int nms_get_cursor_row(void) {
|
|
||||||
int i, r = 0;
|
|
||||||
int row = 0;
|
|
||||||
char buf[10];
|
|
||||||
char *cmd = "\033[6n";
|
|
||||||
|
|
||||||
memset(buf, 0, sizeof(buf));
|
|
||||||
|
|
||||||
write(STDOUT_FILENO, cmd, sizeof(cmd));
|
|
||||||
|
|
||||||
r = read(STDIN_FILENO, buf, sizeof(buf));
|
|
||||||
|
|
||||||
for (i = 0; i < r; ++i) {
|
|
||||||
if (buf[i] == 27 || buf[i] == '[') {
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (buf[i] >= '0' && buf[i] <= '9') {
|
|
||||||
row = (row * 10) + (buf[i] - '0');
|
|
||||||
}
|
|
||||||
|
|
||||||
if (buf[i] == ';' || buf[i] == 'R' || buf[i] == 0) {
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return row;
|
|
||||||
}
|
|
||||||
68
src/main.c
Normal file
68
src/main.c
Normal file
@ -0,0 +1,68 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2017 Brian Barto
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify it
|
||||||
|
* under the terms of the MIT License. See LICENSE for more details.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <ctype.h>
|
||||||
|
#include "nms.h"
|
||||||
|
|
||||||
|
#define VERSION "0.3.0"
|
||||||
|
#define INPUT_GROWTH_FACTOR 2
|
||||||
|
|
||||||
|
int main(int argc, char *argv[]) {
|
||||||
|
int c, o, inSize = 0, inCapacity = 0;
|
||||||
|
char *input = NULL;
|
||||||
|
|
||||||
|
// Processing command arguments
|
||||||
|
while ((o = getopt(argc, argv, "f:ac:v")) != -1) {
|
||||||
|
switch (o) {
|
||||||
|
case 'f':
|
||||||
|
nms_set_foreground_color(optarg);
|
||||||
|
break;
|
||||||
|
case 'a':
|
||||||
|
nms_set_auto_decrypt(1);
|
||||||
|
break;
|
||||||
|
case 'c':
|
||||||
|
nms_set_clear_scr(1);
|
||||||
|
break;
|
||||||
|
case 'v':
|
||||||
|
printf("nms version " VERSION "\n");
|
||||||
|
return 0;
|
||||||
|
case '?':
|
||||||
|
if (isprint(optopt))
|
||||||
|
fprintf (stderr, "Unknown option '-%c'.\n", optopt);
|
||||||
|
else
|
||||||
|
fprintf (stderr, "Unknown option character '\\x%x'.\n", optopt);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Geting input
|
||||||
|
while ((c = getchar()) != EOF) {
|
||||||
|
++inSize;
|
||||||
|
if (inSize > inCapacity) {
|
||||||
|
inCapacity = inCapacity == 0 ? INPUT_GROWTH_FACTOR : inCapacity * INPUT_GROWTH_FACTOR;
|
||||||
|
input = realloc(input, inCapacity + 1);
|
||||||
|
}
|
||||||
|
input[inSize - 1] = c;
|
||||||
|
input[inSize] = '\0';
|
||||||
|
}
|
||||||
|
|
||||||
|
// Display characters
|
||||||
|
c = nms_exec(input);
|
||||||
|
|
||||||
|
// Print out from nms_exec if it is not null
|
||||||
|
if (c) {
|
||||||
|
printf("%c", c);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Don't forget to free the allocated memory!
|
||||||
|
free(input);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
664
src/nms.c
664
src/nms.c
@ -1,61 +1,637 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2017 Brian Barto
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify it
|
||||||
|
* under the terms of the MIT License. See LICENSE for more details.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* DESCRIPTION
|
||||||
|
*
|
||||||
|
* This library encapsulates the functionality required to produce the
|
||||||
|
* famous data decryption effect from the 1992 hacker movie Sneakers.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define _XOPEN_SOURCE 700
|
||||||
|
|
||||||
#include <stdio.h>
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
#include <stdlib.h>
|
#include <stdlib.h>
|
||||||
|
#include <termios.h>
|
||||||
#include <unistd.h>
|
#include <unistd.h>
|
||||||
|
#include <sys/ioctl.h>
|
||||||
#include <ctype.h>
|
#include <ctype.h>
|
||||||
#include "libnms.h"
|
#include <stdbool.h>
|
||||||
|
#include <time.h>
|
||||||
|
#include <locale.h>
|
||||||
|
#include <wchar.h>
|
||||||
|
#include "nms.h"
|
||||||
|
|
||||||
#define VERSION "0.3.0"
|
// Color identifiers
|
||||||
#define INPUT_GROWTH_FACTOR 2
|
#define COLOR_BLACK 0
|
||||||
|
#define COLOR_RED 1
|
||||||
|
#define COLOR_GREEN 2
|
||||||
|
#define COLOR_YELLOW 3
|
||||||
|
#define COLOR_BLUE 4
|
||||||
|
#define COLOR_MAGENTA 5
|
||||||
|
#define COLOR_CYAN 6
|
||||||
|
#define COLOR_WHITE 7
|
||||||
|
|
||||||
int main(int argc, char *argv[]) {
|
// Macros for VT100 codes
|
||||||
int c, o, inSize = 0, inCapacity = 0;
|
#define CLEAR_SCR() printf("\033[2J") // Clear Screen
|
||||||
char *input = NULL;
|
#define CURSOR_HOME() printf("\033[H") // Move cursor to home position (0,0)
|
||||||
|
#define CURSOR_MOVE(x,y) printf("\033[%i;%iH", x, y) // Move cursor to x,y
|
||||||
|
#define BEEP() printf("\a"); // terminal bell
|
||||||
|
#define BOLD() printf("\033[1m") // Cursor bold
|
||||||
|
#define FOREGROUND_COLOR(x) printf("\033[3%im", x) // Set foreground color
|
||||||
|
#define CLEAR_ATTR() printf("\033[0m") // Clear bold/color attributes
|
||||||
|
#define SCREEN_SAVE() printf("\033[?47h") // Save screen display
|
||||||
|
#define SCREEN_RESTORE() printf("\033[?47l") // Restore screen to previously saved state
|
||||||
|
#define CURSOR_SAVE() printf("\033[s") // Save cursor position
|
||||||
|
#define CURSOR_RESTORE() printf("\033[u") // Restore cursor position
|
||||||
|
#define CURSOR_HIDE() printf("\033[?25l") // Hide cursor
|
||||||
|
#define CURSOR_SHOW() printf("\033[?25h") // Unhide cursor
|
||||||
|
|
||||||
// Processing command arguments
|
// Program settings
|
||||||
while ((o = getopt(argc, argv, "f:acv")) != -1) {
|
#define TYPE_EFFECT_SPEED 4 // miliseconds per char
|
||||||
switch (o) {
|
#define JUMBLE_SECONDS 2 // number of seconds for jumble effect
|
||||||
case 'f':
|
#define JUMBLE_LOOP_SPEED 35 // miliseconds between each jumble
|
||||||
nms_set_foreground_color(optarg);
|
#define REVEAL_LOOP_SPEED 50 // miliseconds between each reveal loop
|
||||||
break;
|
#define MASK_CHAR_COUNT 218 // Total characters in maskCharTable[] array.
|
||||||
case 'a':
|
|
||||||
nms_set_auto_decrypt(1);
|
// Character attribute structure, linked list. Keeps track of every
|
||||||
break;
|
// character's attributes required for rendering and decryption effect.
|
||||||
case 'c':
|
struct charAttr {
|
||||||
nms_set_clear_scr(1);
|
char *source;
|
||||||
break;
|
char *mask;
|
||||||
case 'v':
|
int width;
|
||||||
printf("nms version " VERSION "\n");
|
int is_space;
|
||||||
|
int time;
|
||||||
|
struct charAttr *next;
|
||||||
|
};
|
||||||
|
|
||||||
|
// Static function prototypes
|
||||||
|
static void nms_sleep(int);
|
||||||
|
static int nms_term_rows(void);
|
||||||
|
static int nms_term_cols(void);
|
||||||
|
static void nms_set_terminal(int s);
|
||||||
|
static void nms_clear_input(void);
|
||||||
|
static char nms_get_char(void);
|
||||||
|
static int nms_get_cursor_row(void);
|
||||||
|
|
||||||
|
// NMS settings
|
||||||
|
static int foregroundColor = COLOR_BLUE; // Foreground color setting
|
||||||
|
static char *returnOpts = NULL; // Return option setting
|
||||||
|
static int autoDecrypt = 0; // Auto-decrypt flag
|
||||||
|
static int clearScr = 0; // clearScr flag
|
||||||
|
static int colorOn = 1; // Terminal color flag
|
||||||
|
static int inputPositionX = -1; // X coordinate for input position
|
||||||
|
static int inputPositionY = -1; // Y coordinate for input position
|
||||||
|
|
||||||
|
// Character table representing the character set know as CP437 used by
|
||||||
|
// the original IBM PC - https://en.wikipedia.org/wiki/Code_page_437
|
||||||
|
static char *maskCharTable[] = {
|
||||||
|
"!", "\"", "#", "$", "%", "&", "'", "(", ")", "*", "+", ",", "-", "~",
|
||||||
|
".", "/", ":", ";", "<", "=", ">", "?", "[", "\\", "]", "_", "{", "}",
|
||||||
|
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
|
||||||
|
"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z",
|
||||||
|
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m",
|
||||||
|
"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
|
||||||
|
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
|
||||||
|
"\xc3\x87", "\xc3\xbc", "\xc3\xa9", "\xc3\xa2", "\xc3\xa4", "\xc3\xa0",
|
||||||
|
"\xc3\xa5", "\xc3\xa7", "\xc3\xaa", "\xc3\xab", "\xc3\xa8", "\xc3\xaf",
|
||||||
|
"\xc3\xae", "\xc3\xac", "\xc3\x84", "\xc3\x85", "\xc3\x89", "\xc3\xa6",
|
||||||
|
"\xc3\x86", "\xc3\xb4", "\xc3\xb6", "\xc3\xb2", "\xc3\xbb", "\xc3\xb9",
|
||||||
|
"\xc3\xbf", "\xc3\x96", "\xc3\x9c", "\xc2\xa2", "\xc2\xa3", "\xc2\xa5",
|
||||||
|
"\xc6\x92", "\xc3\xa1", "\xc3\xad", "\xc3\xb3", "\xc3\xba", "\xc3\xb1",
|
||||||
|
"\xc3\x91", "\xc2\xaa", "\xc2\xba", "\xc2\xbf", "\xc2\xac", "\xc2\xbd",
|
||||||
|
"\xc2\xbc", "\xc2\xa1", "\xc2\xab", "\xc2\xbb", "\xce\xb1", "\xc3\x9f",
|
||||||
|
"\xce\x93", "\xcf\x80", "\xce\xa3", "\xcf\x83", "\xc2\xb5", "\xcf\x84",
|
||||||
|
"\xce\xa6", "\xce\x98", "\xce\xa9", "\xce\xb4", "\xcf\x86", "\xce\xb5",
|
||||||
|
"\xc2\xb1", "\xc3\xb7", "\xc2\xb0", "\xc2\xb7", "\xc2\xb2", "\xc2\xb6",
|
||||||
|
"\xe2\x8c\x90", "\xe2\x82\xa7", "\xe2\x96\x91", "\xe2\x96\x92",
|
||||||
|
"\xe2\x96\x93", "\xe2\x94\x82", "\xe2\x94\xa4", "\xe2\x95\xa1",
|
||||||
|
"\xe2\x95\xa2", "\xe2\x95\x96", "\xe2\x95\x95", "\xe2\x95\xa3",
|
||||||
|
"\xe2\x95\x91", "\xe2\x95\x97", "\xe2\x95\x9d", "\xe2\x95\x9c",
|
||||||
|
"\xe2\x95\x9b", "\xe2\x94\x90", "\xe2\x94\x94", "\xe2\x94\xb4",
|
||||||
|
"\xe2\x94\xac", "\xe2\x94\x9c", "\xe2\x94\x80", "\xe2\x94\xbc",
|
||||||
|
"\xe2\x95\x9e", "\xe2\x95\x9f", "\xe2\x95\x9a", "\xe2\x95\x94",
|
||||||
|
"\xe2\x95\xa9", "\xe2\x95\xa6", "\xe2\x95\xa0", "\xe2\x95\x90",
|
||||||
|
"\xe2\x95\xac", "\xe2\x95\xa7", "\xe2\x95\xa8", "\xe2\x95\xa4",
|
||||||
|
"\xe2\x95\xa7", "\xe2\x95\x99", "\xe2\x95\x98", "\xe2\x95\x92",
|
||||||
|
"\xe2\x95\x93", "\xe2\x95\xab", "\xe2\x95\xaa", "\xe2\x94\x98",
|
||||||
|
"\xe2\x94\x8c", "\xe2\x96\x88", "\xe2\x96\x84", "\xe2\x96\x8c",
|
||||||
|
"\xe2\x96\x90", "\xe2\x96\x80", "\xe2\x88\x9e", "\xe2\x88\xa9",
|
||||||
|
"\xe2\x89\xa1", "\xe2\x89\xa5", "\xe2\x89\xa4", "\xe2\x8c\xa0",
|
||||||
|
"\xe2\x8c\xa1", "\xe2\x89\x88", "\xe2\x88\x99", "\xe2\x88\x9a",
|
||||||
|
"\xe2\x81\xbf", "\xe2\x96\xa0"
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_exec() - This function is passed a pointer to a character string
|
||||||
|
* and displays the contents of the string in a way that mimicks the
|
||||||
|
* "decrypting text" effect in the 1992 movie Sneakers. It returns the
|
||||||
|
* last character pressed by the user.
|
||||||
|
*/
|
||||||
|
char nms_exec(char *string) {
|
||||||
|
struct charAttr *list_pointer = NULL;
|
||||||
|
struct charAttr *list_head = NULL;
|
||||||
|
struct charAttr *list_temp = NULL;
|
||||||
|
int i, revealed = 0;
|
||||||
|
int maxRows, maxCols, curRow, curCol, origRow = 0, origCol = 0;
|
||||||
|
char ret = 0;
|
||||||
|
|
||||||
|
// Error if we have an empty string.
|
||||||
|
if (string == NULL || string[0] == '\0') {
|
||||||
|
fprintf(stderr, "Error. Empty string.\n");
|
||||||
return 0;
|
return 0;
|
||||||
case '?':
|
|
||||||
if (isprint(optopt))
|
|
||||||
fprintf (stderr, "Unknown option '-%c'.\n", optopt);
|
|
||||||
else
|
|
||||||
fprintf (stderr, "Unknown option character '\\x%x'.\n", optopt);
|
|
||||||
return 1;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Reassociate STDIN to the terminal is needed
|
||||||
|
if (!isatty(STDIN_FILENO) && !freopen ("/dev/tty", "r", stdin)) {
|
||||||
|
fprintf(stderr, "Error. Can't associate STDIN with terminal.\n");
|
||||||
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Turn off terminal echo and line buffering
|
||||||
|
nms_set_terminal(0);
|
||||||
|
|
||||||
|
// Needed for UTF-8 support
|
||||||
|
setlocale(LC_ALL, "");
|
||||||
|
|
||||||
|
// Get terminal window rows/cols
|
||||||
|
maxRows = nms_term_rows();
|
||||||
|
maxCols = nms_term_cols();
|
||||||
|
|
||||||
|
// Seed my random number generator with the current time
|
||||||
|
srand(time(NULL));
|
||||||
|
|
||||||
|
// Get cursor position if we are not clearing the screen
|
||||||
|
if (!clearScr) {
|
||||||
|
origRow = nms_get_cursor_row();
|
||||||
|
|
||||||
|
// nms_get_cursor_row() may display output in some terminals. So
|
||||||
|
// we need to reposition the cursor to the start of the row.
|
||||||
|
CURSOR_MOVE(origRow, origCol);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Assign current row/col positions
|
||||||
|
curRow = origRow;
|
||||||
|
curCol = origCol;
|
||||||
|
|
||||||
// Geting input
|
// Geting input
|
||||||
while ((c = getchar()) != EOF) {
|
for (i = 0; string[i] != '\0'; ++i) {
|
||||||
++inSize;
|
|
||||||
if (inSize > inCapacity) {
|
// Don't go beyond maxRows
|
||||||
inCapacity = inCapacity == 0 ? INPUT_GROWTH_FACTOR : inCapacity * INPUT_GROWTH_FACTOR;
|
if (curRow - origRow >= maxRows - 1) {
|
||||||
input = realloc(input, inCapacity + 1);
|
break;
|
||||||
}
|
|
||||||
input[inSize - 1] = c;
|
|
||||||
input[inSize] = '\0';
|
|
||||||
}
|
}
|
||||||
|
|
||||||
//nms_set_input_position(5,5);
|
// Allocate memory for next list link
|
||||||
//nms_set_return_opts("123456");
|
if (list_pointer == NULL) {
|
||||||
//nms_set_clear_scr(0);
|
list_pointer = malloc(sizeof(struct charAttr));
|
||||||
//nms_set_color(0);
|
list_head = list_pointer;
|
||||||
|
} else {
|
||||||
// Display characters
|
list_pointer->next = malloc(sizeof(struct charAttr));
|
||||||
nms_exec(input);
|
list_pointer = list_pointer->next;
|
||||||
|
}
|
||||||
// Don't forget to free the allocated memory!
|
|
||||||
free(input);
|
|
||||||
|
|
||||||
|
// Get character's byte-length and store character.
|
||||||
|
if (mblen(&string[i], 4) > 0) {
|
||||||
|
list_pointer->source = malloc(mblen(&string[i], 4) + 1);
|
||||||
|
strncpy(list_pointer->source, &string[i], mblen(&string[i], 4));
|
||||||
|
list_pointer->source[mblen(&string[i], 4)] = '\0';
|
||||||
|
i += (mblen(&string[i], 4) - 1);
|
||||||
|
} else {
|
||||||
|
fprintf(stderr, "Unknown character encountered. Quitting.\n");
|
||||||
|
nms_set_terminal(1);
|
||||||
return 0;
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Set flag if we have a whitespace character
|
||||||
|
if (strlen(list_pointer->source) == 1 && isspace(list_pointer->source[0]))
|
||||||
|
list_pointer->is_space = 1;
|
||||||
|
else
|
||||||
|
list_pointer->is_space = 0;
|
||||||
|
|
||||||
|
// Set initial mask chharacter
|
||||||
|
list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
|
||||||
|
|
||||||
|
// Set reveal time
|
||||||
|
list_pointer->time = rand() % 5000;
|
||||||
|
|
||||||
|
// Set character column width
|
||||||
|
wchar_t widec[sizeof(list_pointer->source)] = {};
|
||||||
|
mbstowcs(widec, list_pointer->source, sizeof(list_pointer->source));
|
||||||
|
list_pointer->width = wcwidth(*widec);
|
||||||
|
|
||||||
|
// Set next node to null
|
||||||
|
list_pointer->next = NULL;
|
||||||
|
|
||||||
|
// Track row count
|
||||||
|
if (string[i] == '\n' || (curCol += list_pointer->width) > maxCols) {
|
||||||
|
curCol = 0;
|
||||||
|
curRow++;
|
||||||
|
if (curRow == maxRows + 1 && origRow > 0) {
|
||||||
|
origRow--;
|
||||||
|
curRow--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Save terminal state, clear screen, and home/hide the cursor
|
||||||
|
if (clearScr) {
|
||||||
|
CURSOR_SAVE();
|
||||||
|
SCREEN_SAVE();
|
||||||
|
CLEAR_SCR();
|
||||||
|
CURSOR_HOME();
|
||||||
|
CURSOR_HIDE();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Print mask characters with 'type effect'
|
||||||
|
for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
|
||||||
|
|
||||||
|
// Print mask character (or space)
|
||||||
|
if (list_pointer->is_space) {
|
||||||
|
printf("%s", list_pointer->source);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// print mask character
|
||||||
|
printf("%s", list_pointer->mask);
|
||||||
|
if (list_pointer->width == 2) {
|
||||||
|
printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||||
|
}
|
||||||
|
|
||||||
|
// flush output and sleep
|
||||||
|
fflush(stdout);
|
||||||
|
nms_sleep(TYPE_EFFECT_SPEED);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Flush any input up to this point
|
||||||
|
nms_clear_input();
|
||||||
|
|
||||||
|
// If autoDecrypt flag is set, we sleep. Otherwise require user to
|
||||||
|
// press a key to continue.
|
||||||
|
if (autoDecrypt)
|
||||||
|
sleep(1);
|
||||||
|
else
|
||||||
|
nms_get_char();
|
||||||
|
|
||||||
|
// Jumble loop
|
||||||
|
for (i = 0; i < (JUMBLE_SECONDS * 1000) / JUMBLE_LOOP_SPEED; ++i) {
|
||||||
|
|
||||||
|
// Move cursor to home position
|
||||||
|
if (clearScr) {
|
||||||
|
CURSOR_HOME();
|
||||||
|
} else {
|
||||||
|
CURSOR_MOVE(origRow, origCol);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Print new mask for all characters
|
||||||
|
for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
|
||||||
|
|
||||||
|
// Print mask character (or space)
|
||||||
|
if (list_pointer->is_space) {
|
||||||
|
printf("%s", list_pointer->source);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// print new mask character
|
||||||
|
printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||||
|
if (list_pointer->width == 2) {
|
||||||
|
printf("%s", maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// flush output and sleep
|
||||||
|
fflush(stdout);
|
||||||
|
nms_sleep(JUMBLE_LOOP_SPEED);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Reveal loop
|
||||||
|
while (!revealed) {
|
||||||
|
|
||||||
|
// Move cursor to home position
|
||||||
|
if (clearScr) {
|
||||||
|
CURSOR_HOME();
|
||||||
|
} else {
|
||||||
|
CURSOR_MOVE(origRow, origCol);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Set revealed flag
|
||||||
|
revealed = 1;
|
||||||
|
|
||||||
|
for (list_pointer = list_head; list_pointer != NULL; list_pointer = list_pointer->next) {
|
||||||
|
|
||||||
|
// Print mask character (or space)
|
||||||
|
if (list_pointer->is_space) {
|
||||||
|
printf("%s", list_pointer->source);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
// If we still have time before the char is revealed, display the mask
|
||||||
|
if (list_pointer->time > 0) {
|
||||||
|
|
||||||
|
// Change the mask randomly
|
||||||
|
if (list_pointer->time < 500) {
|
||||||
|
if (rand() % 3 == 0) {
|
||||||
|
list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if (rand() % 10 == 0) {
|
||||||
|
list_pointer->mask = maskCharTable[rand() % MASK_CHAR_COUNT];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Print mask
|
||||||
|
printf("%s", list_pointer->mask);
|
||||||
|
|
||||||
|
// Decrement reveal time
|
||||||
|
list_pointer->time -= REVEAL_LOOP_SPEED;
|
||||||
|
|
||||||
|
// Unset revealed flag
|
||||||
|
revealed = 0;
|
||||||
|
} else {
|
||||||
|
|
||||||
|
// Set bold and foreground color for character reveal
|
||||||
|
BOLD();
|
||||||
|
if (colorOn) {
|
||||||
|
FOREGROUND_COLOR(foregroundColor);
|
||||||
|
}
|
||||||
|
|
||||||
|
// print source character
|
||||||
|
printf("%s", list_pointer->source);
|
||||||
|
|
||||||
|
// Unset foreground color
|
||||||
|
CLEAR_ATTR();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// flush output and sleep
|
||||||
|
fflush(stdout);
|
||||||
|
nms_sleep(REVEAL_LOOP_SPEED);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Flush any input up to this point
|
||||||
|
nms_clear_input();
|
||||||
|
|
||||||
|
// Check if user must select from a set of options
|
||||||
|
if (returnOpts != NULL && strlen(returnOpts) > 0) {
|
||||||
|
|
||||||
|
// Position cursor if necessary
|
||||||
|
if (inputPositionY >= 0 && inputPositionX >= 0) {
|
||||||
|
CURSOR_MOVE(inputPositionY, inputPositionX);
|
||||||
|
}
|
||||||
|
|
||||||
|
CURSOR_SHOW();
|
||||||
|
|
||||||
|
// Get and validate user selection
|
||||||
|
while (strchr(returnOpts, ret = nms_get_char()) == NULL) {
|
||||||
|
BEEP();
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
// User must press a key to continue when clearSrc is set
|
||||||
|
// without returnOpts
|
||||||
|
else if (clearScr) {
|
||||||
|
nms_get_char();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Restore screen and cursor is clearSrc is set
|
||||||
|
if (clearScr) {
|
||||||
|
SCREEN_RESTORE();
|
||||||
|
CURSOR_SHOW();
|
||||||
|
CURSOR_RESTORE();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Turn on terminal echo and line buffering
|
||||||
|
nms_set_terminal(1);
|
||||||
|
|
||||||
|
// Freeing the list.
|
||||||
|
list_pointer = list_head;
|
||||||
|
while (list_pointer != NULL) {
|
||||||
|
list_temp = list_pointer;
|
||||||
|
list_pointer = list_pointer->next;
|
||||||
|
free(list_temp->source);
|
||||||
|
free(list_temp);
|
||||||
|
}
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_foreground_color() sets the foreground color of the unencrypted
|
||||||
|
* characters as they are revealed to the color indicated by the 'color'
|
||||||
|
* argument. Valid arguments are "white", "yellow", "magenta", "blue",
|
||||||
|
* "green", "red", and "cyan". This function will default to blue if
|
||||||
|
* passed an invalid color. No value is returned.
|
||||||
|
*/
|
||||||
|
void nms_set_foreground_color(char *color) {
|
||||||
|
|
||||||
|
if(strcmp("white", color) == 0)
|
||||||
|
foregroundColor = COLOR_WHITE;
|
||||||
|
else if(strcmp("yellow", color) == 0)
|
||||||
|
foregroundColor = COLOR_YELLOW;
|
||||||
|
else if(strcmp("black", color) == 0)
|
||||||
|
foregroundColor = COLOR_BLACK;
|
||||||
|
else if(strcmp("magenta", color) == 0)
|
||||||
|
foregroundColor = COLOR_MAGENTA;
|
||||||
|
else if(strcmp("blue", color) == 0)
|
||||||
|
foregroundColor = COLOR_BLUE;
|
||||||
|
else if(strcmp("green", color) == 0)
|
||||||
|
foregroundColor = COLOR_GREEN;
|
||||||
|
else if(strcmp("red", color) == 0)
|
||||||
|
foregroundColor = COLOR_RED;
|
||||||
|
else if(strcmp("cyan", color) == 0)
|
||||||
|
foregroundColor = COLOR_CYAN;
|
||||||
|
else
|
||||||
|
foregroundColor = COLOR_BLUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_return_opts() takes a character sting and copies it to the
|
||||||
|
* returnOpts setting used by nms_exec().
|
||||||
|
*/
|
||||||
|
void nms_set_return_opts(char *opts) {
|
||||||
|
returnOpts = realloc(returnOpts, strlen(opts) + 1);
|
||||||
|
strcpy(returnOpts, opts);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_auto_decrypt() sets the autoDecrypt flag according to the
|
||||||
|
* true/false value of the 'setting' argument.
|
||||||
|
*/
|
||||||
|
void nms_set_auto_decrypt(int setting) {
|
||||||
|
if (setting)
|
||||||
|
autoDecrypt = 1;
|
||||||
|
else
|
||||||
|
autoDecrypt = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_clear_scr() sets the clearScr flag according to the
|
||||||
|
* true/false value of the 'setting' argument.
|
||||||
|
*/
|
||||||
|
void nms_set_clear_scr(int setting) {
|
||||||
|
if (setting)
|
||||||
|
clearScr = 1;
|
||||||
|
else
|
||||||
|
clearScr = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_color() sets the colorOn flag according to the
|
||||||
|
* true/false value of the 'setting' argument.
|
||||||
|
*/
|
||||||
|
void nms_use_color(int setting) {
|
||||||
|
if (setting)
|
||||||
|
colorOn = 1;
|
||||||
|
else
|
||||||
|
colorOn = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_input_position() sets the desired coordinate of the cursor in
|
||||||
|
* the terminal when accepting user input after nms_exec() reveals the
|
||||||
|
* unencrypted characters.
|
||||||
|
*/
|
||||||
|
void nms_set_input_position(int x, int y) {
|
||||||
|
if (x >= 0 && y >= 0) {
|
||||||
|
inputPositionX = x;
|
||||||
|
inputPositionY = y;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_sleep() sleeps for the number of miliseconds indicated by 't'.
|
||||||
|
*/
|
||||||
|
static void nms_sleep(int t) {
|
||||||
|
struct timespec ts;
|
||||||
|
|
||||||
|
ts.tv_sec = t / 1000;
|
||||||
|
ts.tv_nsec = (t % 1000) * 1000000;
|
||||||
|
|
||||||
|
nanosleep(&ts, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_term_rows() gets and returns the number of rows in the current
|
||||||
|
* terminal window.
|
||||||
|
*/
|
||||||
|
static int nms_term_rows(void) {
|
||||||
|
struct winsize w;
|
||||||
|
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
|
||||||
|
|
||||||
|
return w.ws_row;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_term_cols() gets and returns the number of cols in the current
|
||||||
|
* terminal window.
|
||||||
|
*/
|
||||||
|
static int nms_term_cols(void) {
|
||||||
|
struct winsize w;
|
||||||
|
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
|
||||||
|
|
||||||
|
return w.ws_col;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_set_terminal() turns off terminal echo and line buffering when
|
||||||
|
* passed an integer value that evaluates to true. It restores the
|
||||||
|
* original terminal values when passed an integer value that evaluates
|
||||||
|
* to false.
|
||||||
|
*/
|
||||||
|
static void nms_set_terminal(int s) {
|
||||||
|
struct termios tp;
|
||||||
|
static struct termios save;
|
||||||
|
static int state = 1;
|
||||||
|
|
||||||
|
if (s == 0) {
|
||||||
|
if (tcgetattr(STDIN_FILENO, &tp) == -1) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
save = tp;
|
||||||
|
|
||||||
|
tp.c_lflag &=(~ICANON & ~ECHO);
|
||||||
|
|
||||||
|
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &tp) == -1) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if (state == 0 && tcsetattr(STDIN_FILENO, TCSANOW, &save) == -1)
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
state = s;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_clear_input() clears the input buffer of all characters up to
|
||||||
|
* the EOF character.
|
||||||
|
*/
|
||||||
|
static void nms_clear_input(void) {
|
||||||
|
int i;
|
||||||
|
|
||||||
|
ioctl(STDIN_FILENO, FIONREAD, &i);
|
||||||
|
|
||||||
|
while (i > 0) {
|
||||||
|
getchar();
|
||||||
|
--i;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_get_char() returns the next character in the input buffer. In the
|
||||||
|
* case of an EOF character, it blocks until the user presses a key.
|
||||||
|
*/
|
||||||
|
static char nms_get_char(void) {
|
||||||
|
struct timespec ts;
|
||||||
|
int t = 50;
|
||||||
|
char c;
|
||||||
|
|
||||||
|
ts.tv_sec = t / 1000;
|
||||||
|
ts.tv_nsec = (t % 1000) * 1000000;
|
||||||
|
|
||||||
|
while ((c = getchar()) == EOF) {
|
||||||
|
nanosleep(&ts, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
return c;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* nms_get_cursor_row() returns the row position of the cursor as reported
|
||||||
|
* by the terminal program via the ANSI escape code
|
||||||
|
*/
|
||||||
|
static int nms_get_cursor_row(void) {
|
||||||
|
int i, r = 0;
|
||||||
|
int row = 0;
|
||||||
|
char buf[10];
|
||||||
|
char *cmd = "\033[6n";
|
||||||
|
|
||||||
|
memset(buf, 0, sizeof(buf));
|
||||||
|
|
||||||
|
write(STDOUT_FILENO, cmd, sizeof(cmd));
|
||||||
|
|
||||||
|
r = read(STDIN_FILENO, buf, sizeof(buf));
|
||||||
|
|
||||||
|
for (i = 0; i < r; ++i) {
|
||||||
|
if (buf[i] == 27 || buf[i] == '[') {
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (buf[i] >= '0' && buf[i] <= '9') {
|
||||||
|
row = (row * 10) + (buf[i] - '0');
|
||||||
|
}
|
||||||
|
|
||||||
|
if (buf[i] == ';' || buf[i] == 'R' || buf[i] == 0) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return row;
|
||||||
}
|
}
|
||||||
|
|||||||
@ -1,12 +1,12 @@
|
|||||||
/*
|
/*
|
||||||
* Copyright (c) 2016 Brian Barto
|
* Copyright (c) 2017 Brian Barto
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or modify it
|
* This program is free software; you can redistribute it and/or modify it
|
||||||
* under the terms of the MIT License. See LICENSE for more details.
|
* under the terms of the MIT License. See LICENSE for more details.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#ifndef LIBNMS_H
|
#ifndef NMS_H
|
||||||
#define LIBNMS_H 1
|
#define NMS_H 1
|
||||||
|
|
||||||
// Function prototypes
|
// Function prototypes
|
||||||
char nms_exec(char *);
|
char nms_exec(char *);
|
||||||
@ -1,8 +1,15 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2017 Brian Barto
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify it
|
||||||
|
* under the terms of the MIT License. See LICENSE for more details.
|
||||||
|
*/
|
||||||
|
|
||||||
#include <stdio.h>
|
#include <stdio.h>
|
||||||
#include <stdlib.h>
|
#include <stdlib.h>
|
||||||
#include <string.h>
|
#include <string.h>
|
||||||
#include <sys/ioctl.h>
|
#include <sys/ioctl.h>
|
||||||
#include "libnms.h"
|
#include "nms.h"
|
||||||
|
|
||||||
int main(void) {
|
int main(void) {
|
||||||
int termCols, spaces = 0;
|
int termCols, spaces = 0;
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user