update with initial syntaxer implementation

src/parser.cpp

@@ -97,12 +97,14 @@ public:
 
 	void buf_clear(void)
 	{
-		memset(buffer, 0, 256);
+		memset(buffer, 0, MAX_TOKEN_STRING_LEN);
 	}
 
 	void buf_push(char c)
 	{
-		buffer[strlen(buffer)] = c;
+		if (int i = strlen(buffer); i < MAX_TOKEN_STRING_LEN - 1) {
+			buffer[i] = c;
+		}
 	}
 
 	int dispatch_to_current(char c)
@@ -140,7 +142,12 @@ public:
 		}
 		else
 		{
-			pr_debug("Unknown character skipped (" << c << "), still in idle");
+			// as per requirements (report all wrong symbols)
+			if (c != ' ' && c != '\0')
+			{
+				pr_warn("Unrecognized character: " << c);
+			}
+
 			return 0;
 		}
 	}
@@ -167,6 +174,34 @@ public:
 	}
 	int leave_rc(void)
 	{
+		// additional check as per requirements
+		{
+			int i, c;
+#if (MAX_TOKEN_STRING_LEN % 8) == 0
+			for (i = 0, c = 0; i < MAX_TOKEN_STRING_LEN; i += 8)
+			{
+				c += (buffer[i+0] == '.')
+				   + (buffer[i+1] == '.')
+				   + (buffer[i+2] == '.')
+				   + (buffer[i+3] == '.')
+				   + (buffer[i+4] == '.')
+				   + (buffer[i+5] == '.')
+				   + (buffer[i+6] == '.')
+				   + (buffer[i+7] == '.');
+			}
+#else
+			for (int i = 0, c = 0; i < MAX_TOKEN_STRING_LEN; i++)
+			{
+				c += buffer[i] == '.';
+			}
+#endif
+			if (c > 1)
+			{
+				pr_warn("Too many dots in CONST: " << buffer);
+				return 0;
+			}
+		}
+
 		double value;
 
 		if (!sscanf(buffer, "%lf", &value))
@@ -342,4 +377,15 @@ void print_token_vector(const std::vector<Expression::Token>& tv)
 	std::cout << "(" << *tv[i].to_str() << ")\n";
 }
 
+void print_token_vector(const std::vector<Expression::Token>& tv, const std::vector<unsigned char>& colorcoding)
+{
+	int i, l;
+	for (i = 0, l = tv.size() - 1; i < l; i++)
+	{
+		std::cout << "(" << *tv[i].to_str() << ") ";
+	}
+
+	std::cout << "(" << *tv[i].to_str() << ")\n";
+}
+
 }