internal static void stackPushBracket(Stack stack, char c, int rownumber, int charnumber)
{
BCChar bcc = new BCChar();
bcc.charvalue = c;
bcc.rownumber = rownumber;
bcc.charnumber = charnumber;
stack.Push(bcc);
}
/// <summary>
/// Check brackets balancing in text parameter. rownumber and charnumber are used for better error explaining
/// </summary>
/// <param name="text">Text to check</param>
/// <param name="rownumber"></param>
/// <param name="charnumber"></param>
/// <returns></returns>
internal static bool checkBrackets(string text, int rownumber, int charnumber)
{
Stack stack = new Stack();
// reading entire text, one character at a time
for (int i = 0; i < text.Length; i++, charnumber++)
{
char c = text[i];
if ((c == '(' && checkRoundBrackets) ||
(c == '[' && checkSquareBrackets) ||
(c == '{' && checkCurlyBrackets) ||
(c == '<' && checkAngleBrackets))
{
// it's an open bracket
stackPushBracket(stack, c, rownumber, charnumber);
}
else if ((c == ')' && checkRoundBrackets) ||
(c == ']' && checkSquareBrackets) ||
(c == '}' && checkCurlyBrackets) ||
(c == '>' && checkAngleBrackets))
{
// it's a close bracket
if (stack.Count > 0)
{
// stack isn't empty: stack pop
BCChar bcc_pop = (BCChar)stack.Pop();
char opened = bcc_pop.charvalue;
// if brackets are not of the same type: error
if ((c == ')' && opened != '(') ||
(c == ']' && opened != '[') ||
(c == '}' && opened != '{') ||
(c == '>' && opened != '<'))
{
displayError(bcc_pop.rownumber, bcc_pop.charnumber);
return(false);
}
}
else
{
// stack is empty: error
displayError(rownumber, charnumber);
return(false);
}
}
else if (c == '\n')
{
// new line
rownumber++;
charnumber = 0;
}
}
if (stack.Count > 0)
{
// stack isn't empty: error
BCChar bcc_pop = (BCChar)stack.Pop();
displayError(bcc_pop.rownumber, bcc_pop.charnumber);
return(false);
}
return(true);
}