Initial commit; basic functionality

hangman.c

@@ -0,0 +1,151 @@
+#include <ncurses.h>
+#include "hangman.h"
+#include <stdlib.h> //atexit
+#include <string.h>
+
+int main(void) {
+    /* Initialization */
+    initscr();
+    atexit(quitProgram);
+    game_state *gs;
+    gs = malloc(sizeof(game_state));
+    initCoordinates(gs);
+    gs->allowedMoves = DEFAULTTRIES;
+    gs->moves = 0;
+    curs_set(0);
+
+    /* start game */
+    initGuessWord(gs);
+    while (checkWin(gs)) {
+        updateScreen(gs);
+        playerInput(gs);
+    }
+    getch();
+    free(gs);
+    return 0;
+}
+
+void quitProgram(void) {
+    endwin();
+}
+
+
+void updateScreen(game_state *gs) {
+    mvprintw(1, 1, "Remaining guesses: %i", (gs->allowedMoves - gs->moves));
+    mvprintw(gs->maxy - 1, 1, "Press ctrl + c to exit.");
+    drawGuessWord(gs);
+    mvprintw(2, 1, "Wrong characters: %s", gs->wrongCharacters);
+    refresh();
+}
+
+void initCoordinates(game_state *gs) {
+    getmaxyx(stdscr, gs->maxy, gs->maxx);
+    gs->centery = gs->maxy / 2;
+    gs->centerx = gs->maxx / 2;
+}
+
+void initGuessWord(game_state *gs) {
+    int i;
+    mvprintw(1, 1, "Please enter your word: ");
+    getstr(gs->guessWord);
+    gs->wordLength = strlen(gs->guessWord);
+    for (i = 0; i < gs->wordLength; i++) {
+        gs->currentWord[i] = '_';
+    }
+    clear(); //clear the screen
+}
+
+void drawGuessWord(game_state *gs) {
+    int startpos = gs->centerx - gs->wordLength;
+    int i, wordpos = 0;
+    int switchspace = 0;
+    for (i = startpos; i < startpos + (gs->wordLength * 2); i++) {
+        if (switchspace) {
+            /* this will place a space */
+            mvprintw(gs->centery, i, " ");
+            switchspace = 0;
+        } else {
+            mvprintw(gs->centery, i, "%c", gs->currentWord[wordpos++]);
+            switchspace = 1;
+        }
+    }
+    refresh();
+}
+
+int playerInput(game_state *gs) {
+    char inp;
+    int i, found = 0;
+    inp = getch();
+    
+    for (i = 0; i < gs->wordLength; i++) {
+        if (inp == gs->guessWord[i]) {
+            found = 1;
+            break;
+        }
+    }
+    if (found) {
+        /* found a valid character */
+        if (fillCurrentWord(gs, inp)) {
+            gs->moves++;
+        }
+    } else {
+        /* no valid character found */
+        if (stackWrongCharacter(gs, inp)) {
+            gs->moves++;
+        }
+    }
+    return 0;
+}
+
+int fillCurrentWord(game_state *gs, char validchar) {
+    int i, alreadyUsed = 0;
+    for (i = 0; i < gs->wordLength; i++) {
+        if (gs->currentWord[i] == validchar) {
+            alreadyUsed = 1;
+            break;
+        }
+    }
+    if (!alreadyUsed) {        
+        for (i = 0; i < gs->wordLength; i++) {
+            if (gs->guessWord[i] == validchar) {
+                gs->currentWord[i] = validchar;
+            }
+        }
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+int stackWrongCharacter(game_state *gs, char wrongchar) {
+    int i, alreadyUsed = 0;
+    for (i = 0; i < gs->wordLength; i++) {
+        if (gs->wrongCharacters[i] == wrongchar) {
+            alreadyUsed = 1;
+        }
+    }
+    
+    if (!alreadyUsed) {
+        gs->wrongCharacters[strlen(gs->wrongCharacters)] = wrongchar;
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+int checkWin(game_state *gs) {
+    if (strcmp(gs->guessWord, gs->currentWord) != 0 && gs->moves < gs->allowedMoves) {
+        /* next move */
+        return 1;
+    } else {
+        /* game end: decide if game is won or lost */
+        clear();
+        if (gs->moves >= gs->allowedMoves) {
+            mvprintw(gs->centery, gs->centerx, "Game lost.");
+        } else {
+            mvprintw(gs->centery, gs->centerx, "Game won!");
+        }
+        refresh();
+        return 0;
+    }
+}