private void CalcPreCheck()
{
pre_check_value = null;
if (node_list == null)
{
return;
}
if (node_list.Count != 1)
{
return;
}
if (node_list[0].Count < 1)
{
return;
}
if (node_list[0][0].repeat == ABnfRuleNodeRepeatType.NRT_NOT_OR_MORE ||
node_list[0][0].repeat == ABnfRuleNodeRepeatType.NRT_ONE_OR_NOT)
{
return;
}
if (node_list[0][0].value == null)
{
return;
}
var value = node_list[0][0].value;
if (value.type != ABnfRuleTokenType.TT_STRING &&
value.type != ABnfRuleTokenType.TT_KEY)
{
return;
}
pre_check_value = value;
}
public ABnfRuleNodeInfo(ABnfRuleTokenInfo v)
{
value = v;
repeat = ABnfRuleNodeRepeatType.NRT_NONE;
pin = ABnfRuleNodePinType.NPT_NONE;
not_key = ABnfRuleNodeNotKeyType.NNKT_NONE;
node_list = new List <List <ABnfRuleNodeInfo> >();
}
// Token解析
List <ABnfRuleTokenInfo> CalcToken()
{
var token_list = new List <ABnfRuleTokenInfo>();
int line = 0; // 当前行
int col = 0; // 当前列
ABnfRuleTokenInfo token = null;
int index = 0;
while (index < m_buffer.Length)
{
char c = m_buffer[index];
char next_c = '\0';
if (index + 1 < m_buffer.Length)
{
next_c = m_buffer[index + 1];
}
// 计算行列
if (c == '\n')
{
++line;
col = 0;
}
else
{
++col;
}
// 如果在当引号内部
if (token != null && token.type == ABnfRuleTokenType.TT_STRING)
{
if (c == '\\')
{
if (next_c == '\\' || next_c == '\'')
{
token.value += next_c; ++index; ++col;
}
else if (next_c == 'a')
{
token.value += '\a'; ++index; ++col;
}
else if (next_c == 'b')
{
token.value += '\b'; ++index; ++col;
}
else if (next_c == 'f')
{
token.value += '\f'; ++index; ++col;
}
else if (next_c == 'n')
{
token.value += '\n'; ++index; ++col;
}
else if (next_c == 'r')
{
token.value += '\r'; ++index; ++col;
}
else if (next_c == 't')
{
token.value += '\t'; ++index; ++col;
}
else if (next_c == 'v')
{
token.value += '\v'; ++index; ++col;
}
else
{
token.value += c;
}
}
else if (c == '\'')
{
// 收集符号
if (!m_symbol_set.Contains(token.value))
{
m_symbol_set.Add(token.value);
}
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else if (token != null && token.type == ABnfRuleTokenType.TT_KEY)
{
if (c == '\\')
{
if (next_c == '\\' || next_c == '>')
{
token.value += next_c; ++index; ++col;
}
else if (next_c == 'a')
{
token.value += '\a'; ++index; ++col;
}
else if (next_c == 'b')
{
token.value += '\b'; ++index; ++col;
}
else if (next_c == 'f')
{
token.value += '\f'; ++index; ++col;
}
else if (next_c == 'n')
{
token.value += '\n'; ++index; ++col;
}
else if (next_c == 'r')
{
token.value += '\r'; ++index; ++col;
}
else if (next_c == 't')
{
token.value += '\t'; ++index; ++col;
}
else if (next_c == 'v')
{
token.value += '\v'; ++index; ++col;
}
else
{
token.value += c;
}
}
else if (c == '>')
{
// 收集关键字
if (!m_key_set.Contains(token.value))
{
m_key_set.Add(token.value);
}
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else if (token != null && token.type == ABnfRuleTokenType.TT_REGEX)
{
if (c == '\\')
{
if (next_c == '\\' || next_c == '"')
{
token.value += next_c; ++index; ++col;
}
else if (next_c == 'a')
{
token.value += '\a'; ++index; ++col;
}
else if (next_c == 'b')
{
token.value += '\b'; ++index; ++col;
}
else if (next_c == 'f')
{
token.value += '\f'; ++index; ++col;
}
else if (next_c == 'n')
{
token.value += '\n'; ++index; ++col;
}
else if (next_c == 'r')
{
token.value += '\r'; ++index; ++col;
}
else if (next_c == 't')
{
token.value += '\t'; ++index; ++col;
}
else if (next_c == 'v')
{
token.value += '\v'; ++index; ++col;
}
else
{
token.value += c;
}
}
else if (c == '"')
{
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else if (token != null && token.type == ABnfRuleTokenType.TT_LINE_COMMENT)
{
if (c == '\r')
{
if (next_c == '\n')
{
++index;
++line;
col = 0;
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else if (c == '\n')
{
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else if (token != null && token.type == ABnfRuleTokenType.TT_BLOCK_COMMENT)
{
if (c == '*')
{
if (next_c == '/')
{
++index;
++col;
token_list.Add(token);
token = null;
}
else
{
token.value += c;
}
}
else
{
token.value += c;
}
}
else
{
if (c == '\'')
{
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_STRING);
token.line = line;
token.col = col;
}
else if (c == '<')
{
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_KEY);
token.line = line;
token.col = col;
}
else if (c == '"')
{
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_REGEX);
token.line = line;
token.col = col;
}
else if (c == '/' && next_c == '/')
{
++index;
++col;
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_LINE_COMMENT);
token.line = line;
token.col = col;
}
else if (c == '/' && next_c == '*')
{
++index;
++col;
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_BLOCK_COMMENT);
token.line = line;
token.col = col;
}
else if (c == '=' || c == '@' || c == '#' || c == ':' ||
c == '*' || c == '?' || c == '+' ||
c == '|' || c == ';' ||
c == '(' || c == ')')
{
if (token != null)
{
token_list.Add(token);
}
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_SYMBOL);
token.value += c;
token.line = line;
token.col = col;
token_list.Add(token);
token = null;
}
else if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
{
if (token != null)
{
token_list.Add(token);
}
token = null;
}
else
{
if (token == null)
{
token = new ABnfRuleTokenInfo(ABnfRuleTokenType.TT_ID);
token.line = line;
token.col = col;
}
token.value += c;
}
}
++index;
}
if (token != null)
{
token_list.Add(token);
}
return(token_list);
}
// 解析规则节点
ABnfRuleNodeInfo CalcABnfNode(List <ABnfRuleTokenInfo> token_list, ref int offset)
{
ABnfRuleNodeInfo node = new ABnfRuleNodeInfo();
while (offset < token_list.Count)
{
ABnfRuleTokenInfo token = token_list[offset];
// 如果是注释，那么就跳过
if (token.type == ABnfRuleTokenType.TT_LINE_COMMENT || token.type == ABnfRuleTokenType.TT_BLOCK_COMMENT)
{
++offset;
continue;
}
// 检查ID
if (token.type == ABnfRuleTokenType.TT_ID)
{
// 正则表达式匹配
if (!Regex.IsMatch(token.value, "^[_a-zA-Z][_a-zA-Z0-9]*$"))
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "ID 必须以小写字母、大写字母、数字、下划线，并且不能以数字开头，但是得到是:" + token.value);
}
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(new ABnfRuleNodeInfo(token));
++offset;
continue;
}
// 检查字符串
if (token.type == ABnfRuleTokenType.TT_STRING ||
token.type == ABnfRuleTokenType.TT_KEY ||
token.type == ABnfRuleTokenType.TT_REGEX)
{
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(new ABnfRuleNodeInfo(token));
++offset;
continue;
}
// 最后检查符号
if (token.type == ABnfRuleTokenType.TT_SYMBOL)
{
if (token.value == "(")
{
++offset;
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(CalcABnfNode(token_list, ref offset));
if (offset >= token_list.Count || token_list[offset].value != ")")
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "期望是)，但得到的是:" + token.value);
}
++offset;
continue;
}
else if (token.value == "*")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号*前面没有定义内容");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号*前面已经定义了重复规则");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_NOT_OR_MORE;
++offset;
continue;
}
else if (token.value == "+")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号+前面没有定义内容");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号+前面已经定义了重复规则");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_AT_LEAST_ONE;
++offset;
continue;
}
else if (token.value == "?")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号?前面没有定义内容");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号?前面已经定义了重复规则");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_ONE_OR_NOT;
++offset;
continue;
}
else if (token.value == "@")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号@前面没有定义内容");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].pin != ABnfRuleNodePinType.NPT_NONE)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号@前面已经定义了pin规则");
}
node_list[node_list.Count - 1].pin = ABnfRuleNodePinType.NPT_TRUE;
++offset;
continue;
}
else if (token.value == "#")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号#前面没有定义内容");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].not_key != ABnfRuleNodeNotKeyType.NNKT_NONE)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号#前面已经定义了非key规则");
}
node_list[node_list.Count - 1].not_key = ABnfRuleNodeNotKeyType.NNKT_TRUE;
++offset;
continue;
}
else if (token.value == "|")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号|前面没有定义内容");
}
if (offset + 1 >= token_list.Count &&
token_list[offset + 1].type == ABnfRuleTokenType.TT_SYMBOL &&
token_list[offset + 1].value == ";")
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "符号|后面没有定义内容");
}
node.node_list.Add(new List <ABnfRuleNodeInfo>());
++offset;
continue;
}
else if (token.value == ";" || token.value == ")")
{
break;
}
else
{
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "当前不能处理:" + token.value);
}
}
throw new System.Exception("行:" + token.line + "列:" + token.col
+ "未知的token类型:" + token.value);
}
return(node);
}
// 解析规则节点
private ABnfRuleNodeInfo CalcABnfNode(List <ABnfRuleTokenInfo> token_list, ref int offset)
{
ABnfRuleNodeInfo node = new ABnfRuleNodeInfo();
while (offset < token_list.Count)
{
ABnfRuleTokenInfo token = token_list[offset];
// 如果是注释，那么就跳过
if (token.type == ABnfRuleTokenType.TT_LINE_COMMENT || token.type == ABnfRuleTokenType.TT_BLOCK_COMMENT)
{
++offset;
continue;
}
// 检查ID
if (token.type == ABnfRuleTokenType.TT_ID)
{
// 正则表达式匹配
if (!Regex.IsMatch(token.value, "^[_a-zA-Z][_a-zA-Z0-9]*$"))
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "ID must start with lowercase letters, uppercase letters, numbers, and underscores, and cannot start with a number, but the result is: " + token.value);
}
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(new ABnfRuleNodeInfo(token));
++offset;
continue;
}
// 检查字符串
if (token.type == ABnfRuleTokenType.TT_STRING ||
token.type == ABnfRuleTokenType.TT_KEY ||
token.type == ABnfRuleTokenType.TT_REGEX)
{
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(new ABnfRuleNodeInfo(token));
++offset;
continue;
}
// 最后检查Left hand of
if (token.type == ABnfRuleTokenType.TT_SYMBOL)
{
if (token.value == "(")
{
++offset;
if (node.node_list.Count == 0)
{
node.node_list.Add(new List <ABnfRuleNodeInfo>());
}
node.node_list[node.node_list.Count - 1].Add(CalcABnfNode(token_list, ref offset));
if (offset >= token_list.Count || token_list[offset].value != ")")
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "The expectation is), but what I get is: " + token.value);
}
++offset;
continue;
}
else if (token.value == "*")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "No content defined in front of the symbol * ");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "The symbol * has previously defined the repetition rule ");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_NOT_OR_MORE;
++offset;
continue;
}
else if (token.value == "+")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Symbol + no content defined in front ");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Symbol + The repetition rule has been defined before ");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_AT_LEAST_ONE;
++offset;
continue;
}
else if (token.value == "?")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Symbol ? No content defined in front ");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].repeat != ABnfRuleNodeRepeatType.NRT_NONE)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Symbol ? has been defined previously");
}
node_list[node_list.Count - 1].repeat = ABnfRuleNodeRepeatType.NRT_ONE_OR_NOT;
++offset;
continue;
}
else if (token.value == "@")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Left hand of @ is missing");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].pin != ABnfRuleNodePinType.NPT_NONE)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Symbol @ is defined after the pin rule");
}
node_list[node_list.Count - 1].pin = ABnfRuleNodePinType.NPT_TRUE;
++offset;
continue;
}
else if (token.value == "#")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Left hand of # is missing");
}
var node_list = node.node_list[node.node_list.Count - 1];
if (node_list[node_list.Count - 1].not_key != ABnfRuleNodeNotKeyType.NNKT_NONE)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Left hand of # has been defined previously");
}
node_list[node_list.Count - 1].not_key = ABnfRuleNodeNotKeyType.NNKT_TRUE;
++offset;
continue;
}
else if (token.value == "|")
{
if (node.node_list.Count == 0 || node.node_list[node.node_list.Count - 1].Count == 0)
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Left hand of | is missing");
}
if (offset + 1 >= token_list.Count &&
token_list[offset + 1].type == ABnfRuleTokenType.TT_SYMBOL &&
token_list[offset + 1].value == ";")
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Right hand of | is missing");
}
node.node_list.Add(new List <ABnfRuleNodeInfo>());
++offset;
continue;
}
else if (token.value == ";" || token.value == ")")
{
break;
}
else
{
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Unsupported:" + token.value);
}
}
throw new System.Exception("Line: " + token.line + ", Col: " + token.col
+ "Unknown token type:" + token.value);
}
return(node);
}
