#define __WORDBLOX_H
#define _XOPEN_SOURCE
#include <unistd.h>
+#include <stdbool.h>
+#include <string.h>
+#include <ctype.h>
#include <gd.h>
#include <gdfontmb.h>
#include <gdfontg.h>
+#include <zlib.h>
+#include <openssl/conf.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
#include "constantstrings.h"
-#define MAX_PUZZLE_SIZE 20
+#define MAX_PUZZLE_SIZE 25
#define MAX_CLUE_LENGTH 150
+#define GRID_PIXELS 37
/* Enum to define terminal colours */
enum COLOR {
DOWN=2
};
+/* for use with the player */
+enum DIRECTION {
+ DIR_FORWARD = 1,
+ DIR_BACK = -1
+};
+
typedef char String[MAX_CLUE_LENGTH];
/* The main puzzle struct type */
char salt[256];
} Puzzle;
+/* The player data struct type - for the player app */
+typedef struct {
+ Puzzle puzzle;
+ char filename[65535];
+ bool is_loaded;
+ char char_ans[MAX_PUZZLE_SIZE][MAX_PUZZLE_SIZE];
+ int cur_row;
+ int cur_col;
+} MainPlayerData;
+
+/* compute the hash of a password */
+void digest_message(const unsigned char *message,
+ size_t message_len, unsigned char **digest, unsigned int *digest_len)
+{
+ EVP_MD_CTX *mdctx;
+
+ if((mdctx = EVP_MD_CTX_new()) == NULL)
+ goto err;
+
+ if(1 != EVP_DigestInit_ex(mdctx, EVP_sha256(), NULL))
+ goto err;
+
+ if(1 != EVP_DigestUpdate(mdctx, message, message_len))
+ goto err;
+
+ if((*digest = (unsigned char *)
+ OPENSSL_malloc(EVP_MD_size(EVP_sha256()))) == NULL)
+ goto err;
+
+ if(1 != EVP_DigestFinal_ex(mdctx, *digest, digest_len))
+ goto err;
+
+ EVP_MD_CTX_free(mdctx);
+ return;
+err:
+ EVP_MD_CTX_free(mdctx);
+ ERR_print_errors_fp(stderr);
+ exit (2);
+}
+
/* get a number from the user */
int get_num ()
{
return true;
/* hash the user input password and compare it with the stored password */
- char* hashed_password = crypt (password, (const char *)p->salt);
+ unsigned char* hashed_password;
+ unsigned int len;
+ digest_message ((const unsigned char *)password, strlen(password),
+ &hashed_password, &len);
- if (strcmp (p->hashed_password, hashed_password) == 0)
+ if (strcmp (p->hashed_password, (const char*) hashed_password) == 0)
+ {
+ OPENSSL_free (hashed_password);
return true;
-
+ }
+ OPENSSL_free (hashed_password);
return false;
}
}
else
{
- srand (time(NULL));
- char salt[256];
- sprintf (salt, "puzzle%d", rand()%1000);
- char* hashedpwd = crypt (password, (const char*)salt);
- strcpy (p->hashed_password, hashedpwd);
- strcpy (p->salt, salt);
+
+ unsigned char* hashedpwd;
+ unsigned int len;
+ digest_message ((const unsigned char *)password, strlen(password),
+ &hashedpwd, &len);
+ strcpy (p->hashed_password, (const char *)hashedpwd);
+ strcpy (p->salt, "\0");
+ OPENSSL_free (hashedpwd);
}
}
/* Output the grid to image - if answerkey is true export filled grid */
void export_grid_image (Puzzle *p, const char *filename, bool answerkey)
{
- int img_size = p->grid_size * 40;
+ int img_size = p->grid_size * GRID_PIXELS;
FILE * outfile = fopen (filename, "wb");
if (outfile == NULL)
{
}
gdImagePtr img = gdImageCreate (img_size, img_size);
- int white = gdImageColorAllocate (img, 255,255,255);
+ gdImageColorAllocate (img, 255,255,255);
int black = gdImageColorAllocate (img, 0, 0, 0);
int blue = gdImageColorAllocate (img, 0, 0, 216);
gdFontPtr sm_fnt = gdFontGetMediumBold ();
{
/* if it is a block, draw the black square */
if (p->chars[i][j] == '#')
- gdImageFilledRectangle (img, j*40, i*40, j*40+40,
- i*40+40,black);
+ gdImageFilledRectangle (img, j*GRID_PIXELS, i*GRID_PIXELS,
+ j*GRID_PIXELS+GRID_PIXELS,
+ i*GRID_PIXELS+GRID_PIXELS,black);
else
{
/* draw a regular square */
- gdImageRectangle (img, j*40, i*40, j*40+40,
- i*40+40, black);
+ gdImageRectangle (img, j*GRID_PIXELS, i*GRID_PIXELS,
+ j*GRID_PIXELS+GRID_PIXELS,
+ i*GRID_PIXELS+GRID_PIXELS, black);
/* print the numers, if it is either start across word or
a down word */
{
char str[5];
sprintf (str, "%d", p->start_across_word[i][j]);
- gdImageString (img, sm_fnt, j*40+2, i*40+2,
- (unsigned char *)str, blue);
+ gdImageString (img, sm_fnt, j*GRID_PIXELS+2,
+ i*GRID_PIXELS+2,
+ (unsigned char *)str, blue);
}
else
{
char str[5];
sprintf (str, "%d", p->start_down_word[i][j]);
- gdImageString (img, sm_fnt, j*40+2, i*40+2,
- (unsigned char *)str, blue);
+ gdImageString (img, sm_fnt, j*GRID_PIXELS+2,
+ i*GRID_PIXELS+2,
+ (unsigned char *)str, blue);
}
}
/* if answerkey is true, draw the character in the cell */
if (answerkey)
{
- gdImageChar (img, lg_fnt, j*40+15, i*40+15,
- p->chars[i][j], black);
+ gdImageChar (img, lg_fnt, j*GRID_PIXELS+15,
+ i*GRID_PIXELS+10, p->chars[i][j], black);
}
}
}
return false;
}
-/* unfreeze the grid - mak editing possible to change words */
+/* unfreeze the grid - make editing possible to change words */
void unfreeze_puzzle (Puzzle *p)
{
for (int i = 0; i < p->grid_size; i ++)
/* freeze the grid - make editing impossible because it finalizes the
across and down words in the grid */
void freeze_puzzle (Puzzle *p)
-{
+{
int word_num = 1;
bool across_word_start, down_word_start;
for (int i = 0; i < p->grid_size; i ++)
across_word_start = false;
down_word_start = false;
/* if it is a blank cell - cover it with a block */
- if (p->chars[i][j] == ' ')
+ if (p->chars[i][j] == ' ' || p->chars[i][j] == '#')
p->chars[i][j] = '#';
/* it is not a blank cell - check all possibilities */
else
/* save the puzzle to a file */
void save_puzzle (Puzzle *puzzle, const char* file) {
FILE *outfile;
- outfile = fopen (file, "w");
+ /* First output the uncompressed contents to a temp file */
+ outfile = tmpfile ();
if (outfile == NULL)
{
fprintf (stderr, "%s\n", ERROR_WRITING_FILE);
exit (1);
}
+ /* grid size is the first field */
fprintf (outfile, "%d\n", puzzle->grid_size);
+ /* whether grid is frozen or not */
fprintf (outfile, "%d\n", puzzle->grid_frozen);
+ /* the hashed password */
fprintf (outfile, "%s\n", puzzle->hashed_password);
+ /* the salt */
fprintf (outfile, "%s\n", puzzle->salt);
+
+ /* First output the grid characters columns/rows */
for (int i = 0; i < puzzle->grid_size; i ++)
{
for (int j = 0; j < puzzle->grid_size; j ++)
fprintf (outfile, "%c", puzzle->chars[i][j]);
fprintf (outfile, "\n");
}
+
+ /* Next output the start across/down numbers */
for (int i = 0; i < puzzle->grid_size; i ++)
{
for (int j = 0; j < puzzle->grid_size; j++)
}
fprintf (outfile, "\n");
}
+
+ /* Output the across clues */
fprintf (outfile, "ACROSS\n");
+ /* Search the grid for across words */
for (int i = 0; i < puzzle->grid_size; i ++)
{
for (int j = 0; j < puzzle->grid_size; j++)
{
+ /* if it is an across word, then put the word index followed by
+ tab character (as separator) and the clue */
if (puzzle->start_across_word[i][j] != -1)
fprintf (outfile, "%d\t%s\n", puzzle->start_across_word[i][j],
puzzle->clue_across[i][j]);
}
}
+
+ /* Output the down clues */
fprintf (outfile, "DOWN\n");
+ /* Search the grid for down words */
for (int i = 0; i < puzzle->grid_size; i ++)
{
for (int j = 0; j < puzzle->grid_size; j++)
{
+ /* same as across word, put the word index followed by the tab
+ character and then the clue */
if (puzzle->start_down_word[i][j] != -1)
fprintf (outfile, "%d\t%s\n", puzzle->start_down_word[i][j],
puzzle->clue_down[i][j]);
}
}
-
+
+ /* Flush the buffer and rewind to beginning - to read and save into
+ gzip compressed file */
+ fflush (outfile);
+ fseek (outfile, 0, 0);
+
+ /* now compress the file and save it to destination file */
+ gzFile outdestfile = gzopen (file, "wb");
+ if (outdestfile == NULL)
+ {
+ fprintf (stderr, "%s\n", ERROR_WRITING_FILE);
+ fclose (outfile);
+ exit (1);
+ }
+ char buf[128];
+ int num = fread (buf, sizeof(char), sizeof(char)*128, outfile);
+ while (num > 0)
+ {
+ int res = gzwrite (outdestfile, buf, num*sizeof(char) );
+ if (res == 0)
+ {
+ fprintf (stderr, "%s %s\n", ERROR_WRITING_FILE, COMPRESSED);
+ fclose (outfile);
+ exit (1);
+ }
+ num = fread (buf, sizeof(char), sizeof(char)*128, outfile);
+ }
+ gzclose (outdestfile);
fclose (outfile);
+
}
/* read the puzzle from a file */
Puzzle load_puzzle (const char* file) {
- FILE *infile;
- Puzzle p;
- infile = fopen (file, "rb");
+ /* First open the GZip file */
+ gzFile insourcefile = gzopen (file, "rb");
+ if (insourcefile == NULL)
+ {
+ fprintf (stderr, "%s %s\n", ERROR_READING_FILE, COMPRESSED);
+ exit (1);
+ }
+ /* Open a temporary file to uncompress the contents */
+ FILE *infile = tmpfile ();
if (infile == NULL)
{
fprintf (stderr, "%s\n", ERROR_READING_FILE);
- exit (1);
+ exit (1);
}
+ /* Put the uncompressed content to the temp file */
+ char buf[128];
+ int num = 0;
+ num = gzread (insourcefile, buf, 128);
+ while (num > 0)
+ {
+ int res = fwrite (buf, 1, num, infile);
+ if (res == 0)
+ {
+ fprintf (stderr, "%s\n", ERROR_READING_FILE);
+ fclose (infile);
+ gzclose (insourcefile);
+ exit (1);
+ }
+ num = gzread (insourcefile, buf, 128);
+ }
+ /* Close the gzip file */
+ gzclose (insourcefile);
+ /* Flush the temp file buffer and rewind to beginning */
+ fflush (infile);
+ fseek (infile, 0, 0);
+
+ /* Read the temporary file contents to the structure Puzzle */
+ Puzzle p;
char line[MAX_CLUE_LENGTH+10];
fgets (line, MAX_CLUE_LENGTH + 10, infile);
p.grid_size = atoi (line);
printf ("\u2550");
printf ("\u2557");
reset_color (); printf ("\n");
+ set_color (fg, bg, NORMAL);
printf ("\u2551");
set_color (fg, bg, BOLD);
printf ("%-*s", padding, title);
reset_color (); printf ("\n");
}
+/* reset the player data, from the new file */
+void reset_player_data (MainPlayerData *app_data, const char *filename)
+{
+ app_data->puzzle = load_puzzle (filename);
+
+ app_data->is_loaded = app_data->puzzle.grid_frozen;
+ app_data->cur_col = -1;
+ app_data->cur_row = -1;
+ strcpy (app_data->filename, filename);
+ /* reset the answer keys */
+ for (int i = 0; i < app_data->puzzle.grid_size; i ++)
+ for (int j = 0; j < app_data->puzzle.grid_size; j ++)
+ app_data->char_ans[i][j] = ' ';
+
+}
+
+/* in the player app, move the current selection index left or right */
+void move_current_col (MainPlayerData *app_data, enum DIRECTION dir)
+{
+ int r = app_data->cur_row;
+ int c = app_data->cur_col;
+ if (dir == DIR_FORWARD)
+ {
+ c ++;
+ while (c < app_data->puzzle.grid_size)
+ {
+ if (app_data->puzzle.chars[r][c] == '#')
+ c ++;
+ else
+ break;
+ }
+ if (c < app_data->puzzle.grid_size)
+ app_data->cur_col = c;
+ }
+ else
+ {
+ c --;
+ while (c >= 0)
+ {
+ if (app_data->puzzle.chars[r][c] == '#')
+ c --;
+ else
+ break;
+ }
+ if (c >= 0)
+ app_data->cur_col = c;
+ }
+}
+
+/* in the player app move the current selection index up or down */
+void move_current_row (MainPlayerData *app_data, enum DIRECTION dir)
+{
+ int r = app_data->cur_row;
+ int c = app_data->cur_col;
+ if (dir == DIR_FORWARD)
+ {
+ r ++;
+ while (r < app_data->puzzle.grid_size)
+ {
+ if (app_data->puzzle.chars[r][c] == '#')
+ r ++;
+ else
+ break;
+ }
+ if (r < app_data->puzzle.grid_size)
+ app_data->cur_row = r;
+ }
+ else
+ {
+ r --;
+ while (r >= 0)
+ {
+ if (app_data->puzzle.chars[r][c] == '#')
+ r --;
+ else
+ break;
+ }
+ if (r >= 0)
+ app_data->cur_row = r;
+ }
+}
+
#endif
projects / wordblah.git / blobdiff