Free Hero Mesh

typedef struct {
  Uint16 class;
  Uint8 img,dir;
  Value misc1,misc2,misc3;
} MRU;

#define MRUCOUNT 32
static MRU mru[MRUCOUNT];
static int curmru;

static void redraw_editor(void) {
  char buf[32];
  SDL_Rect r;
  int x,y;
  r.x=r.y=0;

  draw_text(8,32,buf,0xF0,0xFD);
  draw_text(24,32,"x",0xF0,0xF5);
  x=x>=left_margin?(x-left_margin)/picture_size+1:0;
  y=y/picture_size+1;
  if(x>0 && y>0 && x<=pfwidth && y<=pfheight) snprintf(buf,8,"(%2d,%2d)",x,y);
  else strcpy(buf,"       ");
  draw_text(0,40,buf,0xF0,0xF3);
  for(x=0;x<MRUCOUNT;x++) {
    y=picture_size*x+56;
    if(y+picture_size>screen->h) break;
    if(x==curmru) draw_text(0,y,">",0xF0,0xFE);
    if(mru[x].misc1.u|mru[x].misc1.t|mru[x].misc2.u|mru[x].misc2.t|mru[x].misc3.u|mru[x].misc3.t) draw_text(picture_size+16,y,"*",0xF0,0xFB);
  }
  SDL_UnlockSurface(screen);
  r.w=r.h=picture_size;
  r.x=8;
  for(x=0;x<MRUCOUNT;x++) {
    y=picture_size*x+56;
    if(y+picture_size>screen->h) break;
    if(mru[x].class) {
      r.y=y;
      SDL_FillRect(screen,&r,0x00);
      draw_picture(8,y,classes[mru[x].class]->images[mru[x].img]&0x7FFF);
    }
  }
  SDL_Flip(screen);
}

static void show_mouse_xy(SDL_Event*ev) {
  char buf[32];

    sqlite3_str_appendall(m,basefilename);
    sqlite3_str_appendall(m,r+c+1);
  }
  s=sqlite3_str_finish(m);
  if(s) SDL_WM_SetCaption(s,s); else SDL_WM_SetCaption("Free Hero Mesh","Free Hero Mesh");
  sqlite3_free(s);
}

static void add_mru(int cl,int img) {
  int i;
  for(i=0;i<MRUCOUNT-1;i++) if(mru[i].class==cl && mru[i].img==img) break;
  memmove(mru+1,mru,i*sizeof(MRU));
  mru[0].class=cl;
  mru[0].img=img;
  mru[0].dir=0;
  mru[0].misc1=mru[0].misc2=mru[0].misc3=NVALUE(0);
}

static void class_image_select(void) {
  SDL_Event ev;
  SDL_Rect r;
  int clscroll=0;
  int imgscroll=0;
  int clcount=0;

          if(i<0 || i>=clcount) break;
          namei=0;
          cl=cllist[i];
          setclass:
          imgscroll=imgcount=0;
          for(i=0;i<classes[cl]->nimages;i++) if(classes[cl]->images[i]&0x8000) imglist[imgcount++]=i;
          img=*imglist;

        } else {
          i=imgscroll+ev.button.y/picture_size;
          if(i<0 || i>=imgcount) break;
          img=imglist[i];

        }
        if(ev.button.button==3 || ev.button.button==2) add_mru(cl,img);
        if(ev.button.button==2) return;
        goto redraw;
      case SDL_KEYDOWN:
        switch(ev.key.keysym.sym) {
          case SDLK_HOME: clscroll=0; goto redraw;
          case SDLK_END: clscroll=clcount-screen->h/8; goto redraw;
          case SDLK_PAGEDOWN: clscroll+=screen->h/8; goto redraw;
          case SDLK_PAGEUP: clscroll-=screen->h/8; goto redraw;
          case SDLK_ESCAPE: return;
          case SDLK_CLEAR: case SDLK_DELETE: namei=0; goto redraw;
          case SDLK_BACKSPACE: if(namei) --namei; goto redraw;
          case SDLK_TAB:
            if(!cl) break;
            strncpy(name,classes[cl]->name,254);
            for(j=0;j<clcount;j++) if(cl==cllist[j]) break;
            // Increase namei according to all directly following letters that are matching
            while(namei<253 && classes[cl]->name[namei]) {
              for(i=j+1;i<clcount;i++) {
                if(sqlite3_strnicmp(name,classes[cllist[i]]->name,namei)) {
                  // The first part of the name doesn't match; all others did, so accept the next letter.
                  break;
                } else {
                  if(sqlite3_strnicmp(classes[cl]->name+namei,classes[cllist[i]]->name+namei,1)) {
                    // The first part of the name matches but the next letter doesn't.
                    goto redraw;
                  } else {
                    // The first part and next letter are both matching; see if the next one also matches.
                    continue;
                  }
                }
              }
              ++namei;
            }
            goto redraw;
          default:
            j=ev.key.keysym.unicode;
            if(j=='$' || j==21) {
              namei=0;
              goto redraw;
            }
            if(j>32 && j<127 && namei<254) {
              name[namei++]=j;
              for(i=0;i<clcount;i++) {
                if(!sqlite3_strnicmp(name,classes[cllist[i]]->name,namei)) {
                  ev.button.button=1;
                  cl=cllist[i];
                  goto setclass;