Started adding support for events.

CMakeLists.txt

@@ -26,6 +26,7 @@ set(SOURCES
   src/game.c
   src/dialogs.c
   src/npc.c
+  src/events.c
   # ...
 )
 # Shared assets, fx-9860G-only assets and fx-CG-50-only assets

src/dialogs.c

@@ -8,6 +8,7 @@
 #include "config.h"
 #include "game.h"
 #include "npc.h"
+#include "events.h"
 
 
 #define BOX_HEIGHT (F_HEIGHT/PXSIZE+8)
@@ -55,6 +56,7 @@ int showtext_opt(Game *game, bopti_image_t *face, char *text,
                  void for_each_screen(Game *game, unsigned int i),
                  int line_duration, bool update_screen, unsigned int start_i,
                  bool wait_continue) {
+    text = events_parse_string(&game->handler, text);
     dfont(&FONT_USED);
     unsigned int i, n, y = PXSIZE, l = 0;
     int line_max_chars, return_int = 0;

src/events.c

@@ -0,0 +1,100 @@
+#include <stdlib.h>
+#include <string.h>
+#include "events.h"
+
+void events_init_handler(EventHandler *handler) {
+    handler->vars = 0;
+}
+
+int events_bind_variable(EventHandler *handler, int *var, char *name) {
+    if(handler->vars < MAX_VARIABLES){
+        handler->variables[handler->vars] = var;
+        handler->var_names[handler->vars++] = name;
+    }else{
+        return 1;
+    }
+    return 0;
+}
+
+char op_chars[OP_AMOUNT+1] = " =+-/*%";
+
+int _op_null(int a, int b) {
+    return 0;
+}
+
+int _op_set(int a, int b) {
+    return b;
+}
+
+int _op_add(int a, int b) {
+    return a+b;
+}
+
+int _op_sub(int a, int b) {
+    return a-b;
+}
+
+int _op_div(int a, int b) {
+    if(b == 0) return 0;
+    return a/b;
+}
+
+int _op_mul(int a, int b) {
+    return a*b;
+}
+
+int _op_mod(int a, int b) {
+    if(b == 0) return 0;
+    return a%b;
+}
+
+int (*_operations[OP_AMOUNT])(int, int) = {
+    _op_null,
+    _op_set,
+    _op_add,
+    _op_sub,
+    _op_div,
+    _op_mul,
+    _op_mod
+};
+
+char _message_buffer[MESSAGE_BUFFER_SZ];
+char *events_parse_string(EventHandler *handler, char *message) {
+    char *message_ptr = _message_buffer;
+    char in_op = message[0] == '`';
+    char *token;
+    int *var;
+    unsigned int n, i;
+    size_t len;
+    char *sign;
+    size_t left;
+    size_t size;
+    if(!strlen(message)) return message;
+    for(token=strtok(message,"`");token!=NULL;in_op=!in_op,
+                                              token=strtok(NULL,"`")){
+        len = strlen(token);
+        if(in_op && len){
+            sign = NULL;
+            for(n=0;sign==NULL&&n<OP_AMOUNT;n++,sign=strchr(token,op_chars[n]));
+            if(sign != NULL){
+                var = NULL;
+                for(i=0;i<handler->vars;i++){
+                    if(!strncmp(token+1, handler->var_names[i], sign-token-1)){
+                        var = handler->variables[i];
+                        break;
+                    }
+                }
+                if(var){
+                    *var = _operations[n](*var, atoi(sign+1));
+                }
+            }
+        }else{
+            left = (_message_buffer+MESSAGE_BUFFER_SZ)-message_ptr;
+            size = len < left ? len : left;
+            memcpy(message_ptr, token, size);
+            message_ptr += size;
+        }
+    }
+    *message_ptr = '\0';
+    return _message_buffer;
+}

src/events.h

@@ -0,0 +1,35 @@
+#ifndef EVENTS_H
+#define EVENTS_H
+
+#define MAX_VARIABLES 32
+#define MESSAGE_BUFFER_SZ 256
+#define TOKEN_MAX_SZ 32
+
+typedef struct {
+    int *variables[MAX_VARIABLES];
+    char *var_names[MAX_VARIABLES];
+    unsigned int vars;
+} EventHandler;
+
+typedef enum {
+    T_NULL,
+    T_VAR_EDIT,
+    T_AMOUNT
+} Token;
+
+typedef enum {
+    OP_NULL,
+    OP_SET,
+    OP_ADD,
+    OP_SUB,
+    OP_DIV,
+    OP_MUL,
+    OP_MOD,
+    OP_AMOUNT
+} Operation;
+
+void events_init_handler(EventHandler *handler);
+int events_bind_variable(EventHandler *handler, int *var, char *name);
+char *events_parse_string(EventHandler *handler, char *message);
+
+#endif

src/game.c

@@ -98,6 +98,8 @@ void draw(Game *game) {
     player_draw(game);
     render_map_by_layer(game, FOREGROUND);
     render_indicator( game );
+    dprint(8, 8, C_BLACK, "Lifes: %d", game->player.life);
+    dprint(8, 16, C_BLACK, "Mana: %d", game->mana);
 }
 
 /* Key management */

src/game.h

@@ -5,6 +5,8 @@
 #include <gint/display.h>
 #include <stdint.h>
 
+#include "events.h"
+
 
 
 /* The direction where the player is going to. */
@@ -130,7 +132,8 @@ typedef struct {
  * the world. */
 typedef struct {
     Map *map_level; /* The level that the player is currently playing */
-    Player player; /* The player data (see player.h). */
+    Player player; /* The player data. */
+    EventHandler handler; /* The event handler (see events.h). */
     /* Some global variables */
     /* Set to true when asked for exit */
     bool exittoOS;
@@ -145,6 +148,8 @@ typedef struct {
     bool debug_map;
     bool debug_player;
     bool debug_extra;
+
+    int mana; /* Only for testing events TODO: Remove this! */
 } Game;
 
 /* (Mibi88) TODO: Describe what this function is doing. */

src/main.c

@@ -8,6 +8,7 @@
 
 #include "config.h"
 #include "npc.h"
+#include "events.h"
 
 #if USB_FEATURE
     #include <gint/usb-ff-bulk.h>
@@ -36,10 +37,11 @@ extern Map *worldRPG[];
 Game game = {
     NULL,
     {12*PXSIZE, 36*PXSIZE, 0, 0, 12*PXSIZE, 36*PXSIZE, 100, SPEED, false, 0, false, false},
+    {{}, {}, 0},
     false, false, false, 0
 
     /* debug variables*/
-    , false, false, false
+    , false, false, false, 100
 }; 
 
 /* screen capture management code */
@@ -100,6 +102,9 @@ int main(void) {
     timer_start(timer);
 
     game.map_level = worldRPG[0];
+    events_init_handler(&game.handler);
+    events_bind_variable(&game.handler, (int*)&game.player.life, "life");
+    events_bind_variable(&game.handler, &game.mana, "mana");
 
     reload_npc(&game);
 
@@ -115,14 +120,6 @@ int main(void) {
         dgray(DGRAY_ON);
     #endif
 
-/*
-    showtext_dialog(&game, &player_face_img, "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet.", true, true);
-    int in = showtext_dialog_ask(&game, &player_face_img, "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet.", true, false, "Lorem\0Ipsum\0Dolor", 3, 0);
-    if(in==2) showtext_dialog(&game, &player_face_img, "You choosed Dolor", false, true);
-    else if(in==1) showtext_dialog(&game, &player_face_img, "You choosed Ipsum", false, true);
-    else showtext_dialog(&game, &player_face_img, "You choosed Lorem", false, true);
-*/
-
     do{
         /* clear screen */
         dclear(C_WHITE);