Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <bio.h>
#include <draw.h>

#include "sokoban.h"

void
consumeline(Biobuf *b)
{
        while(Bgetc(b) != '\n')
                ;
}

/* parse a level file */
int
loadlevels(char *path)
{
        Biobuf *b;
        int x = 0, y = 0, lnum = 0;
        char c;
                
        if(path == nil)
                return 0;

        b = Bopen(path, OREAD);
        if(b == nil) {
                fprint(2, "could not open file %s: %r\n", path);
                return 0;
        }

        memset(levels, 0, Maxlevels*sizeof(Level));
        
        while((c = Bgetc(b)) > 0) {
                switch(c)  {
                case ';':
                        consumeline(b);         /* no ';'-comments in the middle of a level */
                        break;
                case '\n':
                        levels[lnum].index = lnum;
                        levels[lnum].done = 0;
                        x = 0;
                        levels[lnum].max.y = ++y;

                        c = Bgetc(b);
                        if(c == '\n' || c == Beof) {
                                /* end of level */
                                if(++lnum == Maxlevels)
                                        goto Done;

                                x = 0;
                                y = 0;
                        } else
                                Bungetc(b);
                        break;
                case '#':
                        levels[lnum].board[x][y] = Wall;
                        x++;
                        break;
                case ' ':
                        levels[lnum].board[x][y] = Empty;
                        x++;
                        break;
                case '$':
                        levels[lnum].board[x][y] = Cargo;
                        x++;
                        break;
                case '*':
                        levels[lnum].board[x][y] = GoalCargo;
                        x++;
                        break;
                case '.':
                        levels[lnum].board[x][y] = Goal;
                        x++;
                        break;
                case '@':
                        levels[lnum].board[x][y] = Empty;
                        levels[lnum].glenda = Pt(x, y);
                        x++;
                        break;
                case '+':
                        levels[lnum].board[x][y] = Goal;
                        levels[lnum].glenda = Pt(x, y);
                        x++;
                        break;
                default:
                        fprint(2, "impossible character for level %d: %c\n", lnum+1, c);
                        return 0;
                }
                if(x > levels[lnum].max.x)
                        levels[lnum].max.x = x;
                levels[lnum].max.y = y;
        }
Done:
        Bterm(b);

        level = levels[0];
        numlevels = lnum;

        return 1;
}