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 *
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 *
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 *  @(#)shapes.c    8.1 (Berkeley) 5/31/93
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 *  @(#)shapes.c    8.1 (Berkeley) 5/31/93
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 */
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 */
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/** @addtogroup tetris
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/** @addtogroup tetris
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 * @{
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 * @{
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 */
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 */
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/** @file
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/** @file
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 */
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 */
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/*
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/*
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 */
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 */
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#include <unistd.h>
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#include <unistd.h>
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#include "tetris.h"
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#include "tetris.h"
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#define TL  -B_COLS-1   /* top left */
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#define TL  (-B_COLS - 1)  /* top left */
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#define TC  -B_COLS     /* top center */
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#define TC  (-B_COLS)      /* top center */
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#define TR  -B_COLS+1   /* top right */
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#define TR  (-B_COLS + 1)  /* top right */
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#define ML  -1      /* middle left */
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#define ML  -1             /* middle left */
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#define MR  1       /* middle right */
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#define MR  1              /* middle right */
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#define BL  B_COLS-1    /* bottom left */
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#define BL  (B_COLS - 1)   /* bottom left */
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#define BC  B_COLS      /* bottom center */
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#define BC  B_COLS         /* bottom center */
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#define BR  B_COLS+1    /* bottom right */
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#define BR  (B_COLS + 1)   /* bottom right */
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const struct shape shapes[] = {
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const struct shape shapes[] = {
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    /* 0*/  { 7,    7,  { TL, TC, MR } },
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    /*  0 */  {  7,  7, { TL, TC, MR }, 0xff042d},
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    /* 1*/  { 8,    8,  { TC, TR, ML } },
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    /*  1 */  {  8,  8, { TC, TR, ML }, 0xff9304},
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    /* 2*/  { 9,    11, { ML, MR, BC } },
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    /*  2 */  {  9, 11, { ML, MR, BC }, 0xbeff04},
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    /* 3*/  { 3,    3,  { TL, TC, ML } },
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    /*  3 */  {  3,  3, { TL, TC, ML }, 0x63ff04},
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    /* 4*/  { 12,   14, { ML, BL, MR } },
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    /*  4 */  { 12, 14, { ML, BL, MR }, 0xce04ff},
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    /* 5*/  { 15,   17, { ML, BR, MR } },
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    /*  5 */  { 15, 17, { ML, BR, MR }, 0xff04cf},
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    /* 6*/  { 18,   18, { ML, MR, 2  } }, /* sticks out */
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    /*  6 */  { 18, 18, { ML, MR, 2  }, 0x7604ff},  /* sticks out */
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    /* 7*/  { 0,    0,  { TC, ML, BL } },
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    /*  7 */  {  0,  0, { TC, ML, BL }, 0xff042d},
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    /* 8*/  { 1,    1,  { TC, MR, BR } },
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    /*  8 */  {  1,  1, { TC, MR, BR }, 0xff9304},
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    /* 9*/  { 10,   2,  { TC, MR, BC } },
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    /*  9 */  { 10,  2, { TC, MR, BC }, 0xbeff04},
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    /*10*/  { 11,   9,  { TC, ML, MR } },
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    /* 10 */  { 11,  9, { TC, ML, MR }, 0xbeff04},
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    /*11*/  { 2,    10, { TC, ML, BC } },
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    /* 11 */  {  2, 10, { TC, ML, BC }, 0xbeff04},
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    /*12*/  { 13,   4,  { TC, BC, BR } },
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    /* 12 */  { 13,  4, { TC, BC, BR }, 0xce04ff},
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    /*13*/  { 14,   12, { TR, ML, MR } },
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    /* 13 */  { 14, 12, { TR, ML, MR }, 0xce04ff},
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    /*14*/  { 4,    13, { TL, TC, BC } },
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    /* 14 */  {  4, 13, { TL, TC, BC }, 0xce04ff},
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    /*15*/  { 16,   5,  { TR, TC, BC } },
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    /* 15 */  { 16,  5, { TR, TC, BC }, 0xff04cf},
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    /*16*/  { 17,   15, { TL, MR, ML } },
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    /* 16 */  { 17, 15, { TL, MR, ML }, 0xff04cf},
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    /*17*/  { 5,    16, { TC, BC, BL } },
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    /* 17 */  {  5, 16, { TC, BC, BL }, 0xff04cf},
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    /*18*/  { 6,    6,  { TC, BC, 2*B_COLS } }/* sticks out */
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    /* 18 */  {  6,  6, { TC, BC, 2 * B_COLS }, 0x7604ff}  /* sticks out */
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};
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};
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/*
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/*
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 * Return true iff the given shape fits in the given position,
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 * Return true iff the given shape fits in the given position,
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 * taking the current board into account.
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 * taking the current board into account.
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 */
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 */
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int
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fits_in(const struct shape *shape, int pos)
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int fits_in(const struct shape *shape, int pos)
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{
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{
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    int *o = shape->off;
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    const int *o = shape->off;
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    if (board[pos] || board[pos + *o++] || board[pos + *o++] ||
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    if ((board[pos]) || (board[pos + *o++]) || (board[pos + *o++]) ||
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        board[pos + *o])
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        (board[pos + *o]))
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        return 0;
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        return 0;
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    return 1;
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    return 1;
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}
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}
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/*
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/*
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 * Write the given shape into the current board, turning it on
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 * Write the given shape into the current board, turning it on
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 * if `onoff' is 1, and off if `onoff' is 0.
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 * if `onoff' is 1, and off if `onoff' is 0.
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 */
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 */
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void
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place(const struct shape *shape, int pos, int onoff)
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void place(const struct shape *shape, int pos, int onoff)
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{
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{
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    int *o = shape->off;
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    const int *o = shape->off;
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    board[pos] = onoff;
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    board[pos] = onoff ? shape->color : 0x000000;
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    board[pos + *o++] = onoff;
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    board[pos + *o++] = onoff ? shape->color : 0x000000;
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    board[pos + *o++] = onoff;
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    board[pos + *o++] = onoff ? shape->color : 0x000000;
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    board[pos + *o] = onoff;
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    board[pos + *o] = onoff ? shape->color : 0x000000;
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}
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}
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/** @}
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/** @}
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 */
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 */
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 -