char* GTokenizer::nullTerminate()
{
if(m_pBufPos == m_pBufEnd)
growBuf();
*m_pBufPos = '\0';
return m_pBufStart;
}
void GTokenizer::bufferChar(char c)
{
if(m_pBufPos == m_pBufEnd)
growBuf();
*m_pBufPos = c;
m_pBufPos++;
}
char* GTokenizer::nextWhile(GCharSet& set, size_t minLen)
{
m_pBufPos = m_pBufStart;
while(m_len > 0)
{
char c = m_pStream->peek();
if(!set.find(c))
break;
c = get();
bufferChar(c);
}
if((size_t)(m_pBufPos - m_pBufStart) < minLen)
ThrowError("Unexpected token on line ", to_str(m_line), ", col ", to_str(col()));
if(m_pBufPos == m_pBufEnd)
growBuf();
*m_pBufPos = '\0';
return m_pBufStart;
}
char* GTokenizer::nextUntilNotEscaped(char escapeChar, GCharSet& delimeters)
{
m_pBufPos = m_pBufStart;
char cCur = '\0';
while(m_len > 0)
{
char c = m_pStream->peek();
if(delimeters.find(c) && cCur != escapeChar)
break;
c = get();
bufferChar(c);
cCur = c;
}
if(m_pBufPos == m_pBufEnd)
growBuf();
*m_pBufPos = '\0';
return m_pBufStart;
}
char* GTokenizer::nextArg(GCharSet& delimiters, char escapeChar)
{
char c = m_pStream->peek();
if(c == '"')
{
advance(1);
nextUntil(charSet("\"\n"));
if(peek() != '"')
ThrowError("Expected matching double-quotes on line ",
to_str(m_line), ", col ", to_str(col()));
advance(1);
return m_pBufStart;
}
else if(c == '\'')
{
advance(1);
nextUntil(charSet("'\n"));
if(peek() != '\'')
ThrowError("Expected a matching single-quote on line ", to_str(m_line),
", col ", to_str(col()));
advance(1);
return m_pBufStart;
}
//else
m_pBufPos = m_pBufStart;
bool inEscapeMode = false;
while(m_len > 0)
{
char c = m_pStream->peek();
if(inEscapeMode)
{
if(c == '\n')
{
ThrowError("Error: '", to_str(escapeChar), "' character used as "
"last character on a line to attempt to extend string over "
"two lines on line" , to_str(m_line), ", col ",
to_str(col()) );
}
c = get();
bufferChar(c);
inEscapeMode = false;
}
else
{
if(c == '\n' || delimiters.find(c)){ break; }
c = get();
if(c == escapeChar) { inEscapeMode = true; }
else { bufferChar(c); }
}
}
if(m_pBufPos == m_pBufEnd)
{
growBuf();
}
*m_pBufPos = '\0';
// std::cerr << "nextArg: '" << m_pBufStart << "'\n"; //DEBUG
return m_pBufStart;
}
void ram (void) {
uint8_t key = BTN_RIGHT, button;
lcdClear();
while (1) {
switch (key) {
case BTN_ENTER:
// exit
return;
case BTN_RIGHT:
if (direction != DIRECTION_LEFT)
direction = DIRECTION_RIGHT;
break;
case BTN_UP:
if (direction != DIRECTION_DOWN)
direction = DIRECTION_UP;
break;
case BTN_LEFT:
if (direction != DIRECTION_RIGHT)
direction = DIRECTION_LEFT;
break;
case BTN_DOWN:
if (direction != DIRECTION_UP)
direction = DIRECTION_DOWN;
break;
//Default: No keystroke received. Assuming last keystroke.
}
point newendpoint = snake.endpoint;
shiftPoint (&newendpoint, direction);
bool resetBacon = false;
if (newendpoint.x == bacon.x && newendpoint.y == bacon.y) {
growBuf (&snake, direction);
resetBacon = true;
} else {
setGamePixel(snake.startpoint.x, snake.startpoint.y, 0);
shiftBuf (&snake, direction);
}
if (getGamePixel(snake.endpoint.x, snake.endpoint.y))
break;
setGamePixel(snake.endpoint.x, snake.endpoint.y, 1);
while (resetBacon) {
bacon.x = getRandom() % GAME_WIDTH;
bacon.y = getRandom() % GAME_HEIGHT;
if (!getGamePixel(bacon.x, bacon.y))
resetBacon = false;
}
drawFood (bacon.x, bacon.y);
lcdRefresh();
key = BTN_NONE;
for (i=0; i < ( TIME_PER_MOVE / 50 ); ++i) {
delayms(50);
if ((button = getInputRaw()) != BTN_NONE)
key = button;
}
}
// Game ended, show results
lcdClear();
lcdNl();
lcdPrintln("Game Over");
lcdPrintln("Your score:");
lcdPrintInt(getLength(&snake) - INITIAL_LENGTH + 1);
lcdNl();
lcdPrintln("Press any key");
lcdPrintln("to continue.");
lcdRefresh();
delayms(500);
while(getInputRaw() == BTN_NONE)
delayms(25);
}
