Change file names and update function names (to align with file name changes)
modified: Makefile renamed: src/main.c -> src/nms.c deleted: src/nms.h renamed: src/nms.c -> src/nmseffect.c new file: src/nmseffect.h modified: src/sneakers.c
This commit is contained in:
Brian Barto
parent
a2a6b28df1
commit
5fd104afee
8
Makefile
8
Makefile
@ -17,20 +17,20 @@ CFLAGS ?= -Wextra -Wall
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.PHONY: all install uninstall clean
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nms: $(OBJ)/nmsterm.o $(OBJ)/nms.o $(OBJ)/main.o | $(BIN)
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nms: $(OBJ)/nmsterm.o $(OBJ)/nmseffect.o $(OBJ)/nms.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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sneakers: $(OBJ)/nmsterm.o $(OBJ)/nms.o $(OBJ)/sneakers.o | $(BIN)
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sneakers: $(OBJ)/nmsterm.o $(OBJ)/nmseffect.o $(OBJ)/sneakers.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/$@ $^
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all: nms sneakers
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all-ncurses: nms-ncurses sneakers-ncurses
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nms-ncurses: $(OBJ)/nmsterm_ncurses.o $(OBJ)/nms.o $(OBJ)/main.o | $(BIN)
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nms-ncurses: $(OBJ)/nmsterm_ncurses.o $(OBJ)/nmseffect.o $(OBJ)/nms.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/nms $^ -lncurses
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sneakers-ncurses: $(OBJ)/nmsterm_ncurses.o $(OBJ)/nms.o $(OBJ)/sneakers.o | $(BIN)
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sneakers-ncurses: $(OBJ)/nmsterm_ncurses.o $(OBJ)/nmseffect.o $(OBJ)/sneakers.o | $(BIN)
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$(CC) $(CFLAGS) -o $(BIN)/sneakers $^ -lncurses
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$(OBJ)/%.o: $(SRC)/%.c | $(OBJ)
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68
src/main.c
68
src/main.c
@ -1,68 +0,0 @@
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/*
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* Copyright (c) 2017 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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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "nms.h"
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#define VERSION "0.3.0"
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#define INPUT_GROWTH_FACTOR 2
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int main(int argc, char *argv[]) {
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int c, o, inSize = 0, inCapacity = 0;
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char *input = NULL;
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// Processing command arguments
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while ((o = getopt(argc, argv, "f:acv")) != -1) {
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switch (o) {
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case 'f':
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nms_set_foregroundcolor(optarg);
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break;
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case 'a':
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nms_set_auto_decrypt(1);
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break;
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case 'c':
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nms_set_clearscr(1);
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break;
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case 'v':
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printf("nms version " VERSION "\n");
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return 0;
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case '?':
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if (isprint(optopt))
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fprintf (stderr, "Unknown option '-%c'.\n", optopt);
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else
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fprintf (stderr, "Unknown option character '\\x%x'.\n", optopt);
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return 1;
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}
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}
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// Geting input
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while ((c = getchar()) != EOF) {
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++inSize;
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if (inSize > inCapacity) {
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inCapacity = inCapacity == 0 ? INPUT_GROWTH_FACTOR : inCapacity * INPUT_GROWTH_FACTOR;
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input = realloc(input, inCapacity + 1);
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}
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input[inSize - 1] = c;
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input[inSize] = '\0';
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}
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// Display characters
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c = nms_exec(input);
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// Print out from nms_exec if it is not null
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if (c) {
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printf("%c", c);
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}
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// Don't forget to free the allocated memory!
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free(input);
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return 0;
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}
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456
src/nms.c
456
src/nms.c
@ -4,425 +4,65 @@
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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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* This library encapsulates the functionality required to produce the
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* famous data decryption effect from the 1992 hacker movie Sneakers.
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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 <unistd.h>
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#include <ctype.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 "nms.h"
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#include "nmsterm.h"
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#include "nmseffect.h"
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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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#define VERSION "0.3.0"
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#define INPUT_GROWTH_FACTOR 2
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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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int main(int argc, char *argv[]) {
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int c, o, inSize = 0, inCapacity = 0;
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char *input = NULL;
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// Static function prototypes
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static void nms_sleep(int);
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// NMS settings
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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 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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// Processing command arguments
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while ((o = getopt(argc, argv, "f:acv")) != -1) {
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switch (o) {
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case 'f':
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nmseffect_set_foregroundcolor(optarg);
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break;
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case 'a':
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nmseffect_set_auto_decrypt(1);
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break;
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case 'c':
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nmseffect_set_clearscr(1);
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break;
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case 'v':
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printf("nms version " VERSION "\n");
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return 0;
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case '?':
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if (isprint(optopt))
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fprintf (stderr, "Unknown option '-%c'.\n", optopt);
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else
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fprintf (stderr, "Unknown option character '\\x%x'.\n", optopt);
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return 1;
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}
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}
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// Geting input
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while ((c = getchar()) != EOF) {
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++inSize;
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if (inSize > inCapacity) {
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inCapacity = inCapacity == 0 ? INPUT_GROWTH_FACTOR : inCapacity * INPUT_GROWTH_FACTOR;
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input = realloc(input, inCapacity + 1);
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}
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input[inSize - 1] = c;
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input[inSize] = '\0';
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}
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// Execute effect
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c = nmseffect_exec(input);
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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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// Needed for UTF-8 support
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setlocale(LC_ALL, "");
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// Initialize terminal
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nmsterm_init_terminal();
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if (!nmsterm_get_clearscr()) {
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// Get current row position
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origRow = nmsterm_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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nmsterm_move_cursor(origRow, 0);
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// Print out from nms_exec if it is not null
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if (c) {
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printf("%c", c);
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}
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// Get terminal window rows/cols
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maxRows = nmsterm_get_rows();
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maxCols = nmsterm_get_cols();
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// Don't forget to free the allocated memory!
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free(input);
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// Seed my random number generator with the current time
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srand(time(NULL));
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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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// Processing 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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nmsterm_restore_terminal();
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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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// 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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nmsterm_print_string(list_pointer->source);
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continue;
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}
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// print mask character
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nmsterm_print_string(list_pointer->mask);
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if (list_pointer->width == 2) {
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nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
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}
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// flush output and sleep
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nmsterm_refresh();
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nms_sleep(TYPE_EFFECT_SPEED);
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}
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// Flush any input up to this point
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nmsterm_clear_input();
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// If autoDecrypt flag is set, we sleep. Otherwise require user to
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// press a key to continue.
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if (autoDecrypt)
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sleep(1);
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else
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nmsterm_get_char();
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// Jumble loop
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for (i = 0; i < (JUMBLE_SECONDS * 1000) / JUMBLE_LOOP_SPEED; ++i) {
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// Move cursor to start position
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nmsterm_move_cursor(origRow, origCol);
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// Print new mask for all characters
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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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nmsterm_print_string(list_pointer->source);
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continue;
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}
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// print new mask character
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nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
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if (list_pointer->width == 2) {
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nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
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}
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}
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// flush output and sleep
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nmsterm_refresh();
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nms_sleep(JUMBLE_LOOP_SPEED);
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}
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// Reveal loop
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while (!revealed) {
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// Move cursor to start position
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nmsterm_move_cursor(origRow, origCol);
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// Set revealed flag
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revealed = 1;
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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)
|
||||
if (list_pointer->is_space) {
|
||||
nmsterm_print_string(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
|
||||
nmsterm_print_string(list_pointer->mask);
|
||||
|
||||
// Decrement reveal time
|
||||
list_pointer->time -= REVEAL_LOOP_SPEED;
|
||||
|
||||
// Unset revealed flag
|
||||
revealed = 0;
|
||||
} else {
|
||||
|
||||
// print source character
|
||||
nmsterm_print_reveal_string(list_pointer->source, colorOn);
|
||||
}
|
||||
}
|
||||
|
||||
// flush output and sleep
|
||||
nmsterm_refresh();
|
||||
nms_sleep(REVEAL_LOOP_SPEED);
|
||||
}
|
||||
|
||||
// Flush any input up to this point
|
||||
nmsterm_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) {
|
||||
nmsterm_move_cursor(inputPositionY, inputPositionX);
|
||||
}
|
||||
|
||||
nmsterm_show_cursor();
|
||||
|
||||
// Get and validate user selection
|
||||
while (strchr(returnOpts, ret = nmsterm_get_char()) == NULL) {
|
||||
nmsterm_beep();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// User must press a key to continue when clearSrc is set
|
||||
// without returnOpts
|
||||
else if (nmsterm_get_clearscr()) {
|
||||
nmsterm_get_char();
|
||||
}
|
||||
|
||||
// Restore terminal
|
||||
nmsterm_restore_terminal();
|
||||
|
||||
// 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_foregroundcolor(char *color) {
|
||||
nmsterm_set_foregroundcolor(color);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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_clearscr(int s) {
|
||||
nmsterm_set_clearscr(s);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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);
|
||||
return 0;
|
||||
}
|
||||
|
||||
20
src/nms.h
20
src/nms.h
@ -1,20 +0,0 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef NMS_H
|
||||
#define NMS_H 1
|
||||
|
||||
// Function prototypes
|
||||
char nms_exec(char *);
|
||||
void nms_set_foregroundcolor(char *);
|
||||
void nms_set_return_opts(char *);
|
||||
void nms_set_auto_decrypt(int);
|
||||
void nms_set_clearscr(int);
|
||||
void nms_use_color(int);
|
||||
void nms_set_input_position(int, int);
|
||||
|
||||
#endif
|
||||
421
src/nmseffect.c
Normal file
421
src/nmseffect.c
Normal file
@ -0,0 +1,421 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#define _XOPEN_SOURCE 700
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <ctype.h>
|
||||
#include <time.h>
|
||||
#include <locale.h>
|
||||
#include <wchar.h>
|
||||
#include "nmseffect.h"
|
||||
#include "nmsterm.h"
|
||||
|
||||
// Program settings
|
||||
#define TYPE_EFFECT_SPEED 4 // miliseconds per char
|
||||
#define JUMBLE_SECONDS 2 // number of seconds for jumble effect
|
||||
#define JUMBLE_LOOP_SPEED 35 // miliseconds between each jumble
|
||||
#define REVEAL_LOOP_SPEED 50 // miliseconds between each reveal loop
|
||||
#define MASK_CHAR_COUNT 218 // Total characters in maskCharTable[] array.
|
||||
|
||||
// Character attribute structure, linked list. Keeps track of every
|
||||
// character's attributes required for rendering and decryption effect.
|
||||
struct charAttr {
|
||||
char *source;
|
||||
char *mask;
|
||||
int width;
|
||||
int is_space;
|
||||
int time;
|
||||
struct charAttr *next;
|
||||
};
|
||||
|
||||
// Static function prototypes
|
||||
static void nmseffect_sleep(int);
|
||||
|
||||
// NMS settings
|
||||
static char *returnOpts = NULL; // Return option setting
|
||||
static int autoDecrypt = 0; // Auto-decrypt 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"
|
||||
};
|
||||
|
||||
/*
|
||||
* nmseffect_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 nmseffect_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;
|
||||
}
|
||||
|
||||
// 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;
|
||||
}
|
||||
|
||||
// Needed for UTF-8 support
|
||||
setlocale(LC_ALL, "");
|
||||
|
||||
// Initialize terminal
|
||||
nmsterm_init_terminal();
|
||||
|
||||
if (!nmsterm_get_clearscr()) {
|
||||
// Get current row position
|
||||
origRow = nmsterm_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.
|
||||
nmsterm_move_cursor(origRow, 0);
|
||||
}
|
||||
|
||||
// Get terminal window rows/cols
|
||||
maxRows = nmsterm_get_rows();
|
||||
maxCols = nmsterm_get_cols();
|
||||
|
||||
// Seed my random number generator with the current time
|
||||
srand(time(NULL));
|
||||
|
||||
// Assign current row/col positions
|
||||
curRow = origRow;
|
||||
curCol = origCol;
|
||||
|
||||
// Processing input
|
||||
for (i = 0; string[i] != '\0'; ++i) {
|
||||
|
||||
// Don't go beyond maxRows
|
||||
if (curRow - origRow >= maxRows - 1) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Allocate memory for next list link
|
||||
if (list_pointer == NULL) {
|
||||
list_pointer = malloc(sizeof(struct charAttr));
|
||||
list_head = list_pointer;
|
||||
} else {
|
||||
list_pointer->next = malloc(sizeof(struct charAttr));
|
||||
list_pointer = list_pointer->next;
|
||||
}
|
||||
|
||||
// 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");
|
||||
nmsterm_restore_terminal();
|
||||
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--;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 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) {
|
||||
nmsterm_print_string(list_pointer->source);
|
||||
continue;
|
||||
}
|
||||
|
||||
// print mask character
|
||||
nmsterm_print_string(list_pointer->mask);
|
||||
if (list_pointer->width == 2) {
|
||||
nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||
}
|
||||
|
||||
// flush output and sleep
|
||||
nmsterm_refresh();
|
||||
nmseffect_sleep(TYPE_EFFECT_SPEED);
|
||||
}
|
||||
|
||||
// Flush any input up to this point
|
||||
nmsterm_clear_input();
|
||||
|
||||
// If autoDecrypt flag is set, we sleep. Otherwise require user to
|
||||
// press a key to continue.
|
||||
if (autoDecrypt)
|
||||
sleep(1);
|
||||
else
|
||||
nmsterm_get_char();
|
||||
|
||||
// Jumble loop
|
||||
for (i = 0; i < (JUMBLE_SECONDS * 1000) / JUMBLE_LOOP_SPEED; ++i) {
|
||||
|
||||
// Move cursor to start position
|
||||
nmsterm_move_cursor(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) {
|
||||
nmsterm_print_string(list_pointer->source);
|
||||
continue;
|
||||
}
|
||||
|
||||
// print new mask character
|
||||
nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||
if (list_pointer->width == 2) {
|
||||
nmsterm_print_string(maskCharTable[rand() % MASK_CHAR_COUNT]);
|
||||
}
|
||||
}
|
||||
|
||||
// flush output and sleep
|
||||
nmsterm_refresh();
|
||||
nmseffect_sleep(JUMBLE_LOOP_SPEED);
|
||||
}
|
||||
|
||||
// Reveal loop
|
||||
while (!revealed) {
|
||||
|
||||
// Move cursor to start position
|
||||
nmsterm_move_cursor(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) {
|
||||
nmsterm_print_string(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
|
||||
nmsterm_print_string(list_pointer->mask);
|
||||
|
||||
// Decrement reveal time
|
||||
list_pointer->time -= REVEAL_LOOP_SPEED;
|
||||
|
||||
// Unset revealed flag
|
||||
revealed = 0;
|
||||
} else {
|
||||
|
||||
// print source character
|
||||
nmsterm_print_reveal_string(list_pointer->source, colorOn);
|
||||
}
|
||||
}
|
||||
|
||||
// flush output and sleep
|
||||
nmsterm_refresh();
|
||||
nmseffect_sleep(REVEAL_LOOP_SPEED);
|
||||
}
|
||||
|
||||
// Flush any input up to this point
|
||||
nmsterm_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) {
|
||||
nmsterm_move_cursor(inputPositionY, inputPositionX);
|
||||
}
|
||||
|
||||
nmsterm_show_cursor();
|
||||
|
||||
// Get and validate user selection
|
||||
while (strchr(returnOpts, ret = nmsterm_get_char()) == NULL) {
|
||||
nmsterm_beep();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// User must press a key to continue when clearSrc is set
|
||||
// without returnOpts
|
||||
else if (nmsterm_get_clearscr()) {
|
||||
nmsterm_get_char();
|
||||
}
|
||||
|
||||
// Restore terminal
|
||||
nmsterm_restore_terminal();
|
||||
|
||||
// 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;
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_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 nmseffect_set_foregroundcolor(char *color) {
|
||||
nmsterm_set_foregroundcolor(color);
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_set_return_opts() takes a character sting and copies it to the
|
||||
* returnOpts setting used by nms_exec().
|
||||
*/
|
||||
void nmseffect_set_return_opts(char *opts) {
|
||||
returnOpts = realloc(returnOpts, strlen(opts) + 1);
|
||||
strcpy(returnOpts, opts);
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_set_auto_decrypt() sets the autoDecrypt flag according to the
|
||||
* true/false value of the 'setting' argument.
|
||||
*/
|
||||
void nmseffect_set_auto_decrypt(int setting) {
|
||||
if (setting)
|
||||
autoDecrypt = 1;
|
||||
else
|
||||
autoDecrypt = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_set_clearscr() sets the clearScr flag according to the
|
||||
* true/false value of the 'setting' argument.
|
||||
*/
|
||||
void nmseffect_set_clearscr(int s) {
|
||||
nmsterm_set_clearscr(s);
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_set_color() sets the colorOn flag according to the
|
||||
* true/false value of the 'setting' argument.
|
||||
*/
|
||||
void nmseffect_set_color(int setting) {
|
||||
if (setting)
|
||||
colorOn = 1;
|
||||
else
|
||||
colorOn = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_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 nmseffect_set_input_position(int x, int y) {
|
||||
if (x >= 0 && y >= 0) {
|
||||
inputPositionX = x;
|
||||
inputPositionY = y;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* nmseffect_sleep() sleeps for the number of miliseconds indicated by 't'.
|
||||
*/
|
||||
static void nmseffect_sleep(int t) {
|
||||
struct timespec ts;
|
||||
|
||||
ts.tv_sec = t / 1000;
|
||||
ts.tv_nsec = (t % 1000) * 1000000;
|
||||
|
||||
nanosleep(&ts, NULL);
|
||||
}
|
||||
20
src/nmseffect.h
Normal file
20
src/nmseffect.h
Normal file
@ -0,0 +1,20 @@
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef NMSEFFECT_H
|
||||
#define NMSEFFECT_H 1
|
||||
|
||||
// Function prototypes
|
||||
char nmseffect_exec(char *);
|
||||
void nmseffect_set_foregroundcolor(char *);
|
||||
void nmseffect_set_return_opts(char *);
|
||||
void nmseffect_set_auto_decrypt(int);
|
||||
void nmseffect_set_clearscr(int);
|
||||
void nmseffect_use_color(int);
|
||||
void nmseffect_set_input_position(int, int);
|
||||
|
||||
#endif
|
||||
@ -9,7 +9,7 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include "nms.h"
|
||||
#include "nmseffect.h"
|
||||
#include "nmsterm.h"
|
||||
|
||||
int main(void) {
|
||||
@ -160,12 +160,12 @@ int main(void) {
|
||||
strcat(display, foot2Center);
|
||||
|
||||
// Settings
|
||||
nms_set_input_position(((termCols - strlen(foot2Center)) / 2) + 2, 18);
|
||||
nms_set_return_opts("123456");
|
||||
nms_set_clearscr(1);
|
||||
nmseffect_set_input_position(((termCols - strlen(foot2Center)) / 2) + 2, 18);
|
||||
nmseffect_set_return_opts("123456");
|
||||
nmseffect_set_clearscr(1);
|
||||
|
||||
// Execut effect
|
||||
input = nms_exec(display);
|
||||
input = nmseffect_exec(display);
|
||||
|
||||
// Print user choice
|
||||
printf("You chose %c\n", input);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user