-/* $Id$
-
-This file is part of libmspdatafile
-Copyright © 2007-2008 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include <msp/strings/formatter.h>
+#include <msp/strings/format.h>
#include <msp/strings/utils.h>
#include "input.h"
#include "textparser.h"
namespace Msp {
namespace DataFile {
+class parse_error: public runtime_error
+{
+public:
+ parse_error(const std::string &t):
+ runtime_error(t.empty() ? "at end of input" : format("after '%s'", t))
+ { }
+
+ virtual ~parse_error() throw() { }
+};
+
+
+class syntax_error: public runtime_error
+{
+public:
+ syntax_error(const std::string &t):
+ runtime_error(t.empty() ? "at end of input" : format("at '%s'", t))
+ { }
+
+ virtual ~syntax_error() throw() { }
+};
+
+
TextParser::TextParser(Input &i, const string &s):
ParserMode(i, s)
{ }
Statement TextParser::parse_statement(const Token *t)
{
Statement result;
- bool sub = false;
- bool finish = false;
+ bool sub = false;
+ bool finish = false;
while(in)
{
if(token.str.empty())
break;
else if(token.type!=Token::IDENTIFIER)
- throw_at(ParseError(format("Syntax error at token '%s' (expected an identifier)", token.str)), get_location());
+ throw syntax_error(token.str);
result.keyword = token.str;
result.valid = true;
result.source = src;
else if(finish)
{
if(token.str!=";")
- throw_at(ParseError(format("Syntax error at token '%s' (Expected a ';')", token.str)), get_location());
+ throw syntax_error(token.str);
break;
}
else if(token.str=="{")
else if(token.str==";")
break;
else if(token.type==Token::INTEGER)
- result.args.push_back(Value(INTEGER, token.str));
+ result.append(lexical_cast<IntType::Store>(token.str));
else if(token.type==Token::FLOAT)
- result.args.push_back(Value(FLOAT, token.str));
+ result.append(lexical_cast<FloatType::Store>(token.str));
else if(token.type==Token::STRING)
- result.args.push_back(Value(STRING, token.str));
+ result.append(token.str);
else if(token.type==Token::IDENTIFIER)
{
if(token.str=="true")
- result.args.push_back(Value(BOOLEAN, "1"));
+ result.append(true);
else if(token.str=="false")
- result.args.push_back(Value(BOOLEAN, "0"));
+ result.append(false);
else
- result.args.push_back(Value(ENUM, token.str));
- //result.args.push_back(resolve_identifiertoken.str);
+ result.append(Symbol(token.str));
}
- else if(token.str=="")
- throw_at(ParseError("Unexcepted end of input"), get_location());
else
- throw_at(ParseError("Syntax error"), get_location());
+ throw syntax_error(token.str);
}
return result;
comment = 3;
else if(comment==3) // Skip the second character of block comment end
comment = 0;
- else if(!isspace(c) && !comment)
+ else if(c!=-1 && !isspace(c) && !comment)
comment = -1;
}
if(comment>0) // EOF while in comment
- throw_at(ParseError("Unfinished comment at end of input"), get_location());
+ throw parse_error(string());
else if(comment==0) // Didn't hit any non-whitespace
return Token(Token::SPECIAL, "");
OCTAL,
FLOAT,
FLOATEXP,
+ STRING_END,
IDENTIFIER
};
Token::SPECIAL,
Token::SPECIAL,
Token::SPECIAL,
- Token::STRING,
+ Token::SPECIAL,
Token::SPECIAL,
Token::INTEGER,
Token::INTEGER,
Token::INTEGER,
Token::FLOAT,
Token::FLOAT,
+ Token::STRING,
Token::IDENTIFIER
};
ParseState state = INIT;
- string buf;
- bool escape = false;
+ string buf;
+ bool escape = false;
while(in || state==INIT)
{
return Token(Token::SPECIAL, string(1, c));
else if(isdigit(c))
state = DECIMAL;
- else if(isalpha(c) || c=='_')
+ else if(isalpha(c) || c=='_' || c=='\\')
state = IDENTIFIER;
else
- parse_error(c, "0-9A-Za-z_.\"{};+-");
+ throw parse_error(buf);
break;
case SIGN:
else if(c=='.')
state = FLOAT;
else
- parse_error(c, "0-9.");
+ throw parse_error(buf);
break;
case ZERO:
else if(c=='.')
state = FLOAT;
else
- parse_error(c, "0-9A-Fa-f.");
+ throw parse_error(buf);
break;
case DECIMAL:
if(c=='.')
state = FLOAT;
+ else if(c=='e' || c=='E')
+ state = FLOATEXPINIT;
else if(!isdigit(c))
- parse_error(c, "0-9.");
+ throw parse_error(buf);
break;
case HEXADECIMAL:
if(!isxdigit(c))
- parse_error(c, "0-9A-Fa-f");
+ throw parse_error(buf);
break;
case OCTAL:
if(!isodigit(c))
- parse_error(c, "0-7");
+ throw parse_error(buf);
break;
case FLOAT:
if(c=='e' || c=='E')
state = FLOATEXPINIT;
else if(!isdigit(c))
- parse_error(c, "0-9Ee");
+ throw parse_error(buf);
break;
case FLOATEXPINIT:
else if(isdigit(c))
state = FLOATEXP;
else
- parse_error(c, "0-9+-");
+ throw parse_error(buf);
break;
case FLOATEXPSIGN:
if(isdigit(c))
state = FLOATEXP;
else
- parse_error(c, "0-9");
+ throw parse_error(buf);
break;
case FLOATEXP:
if(!isdigit(c))
- parse_error(c, "0-9");
+ throw parse_error(buf);
break;
case STRING:
if(c=='\\')
escape = !escape;
else if(c=='"' && !escape)
- {
- try
- {
- return Token(Token::STRING, c_unescape(buf.substr(1, buf.size()-2)));
- }
- catch(Exception &e)
- {
- e.at(get_location());
- throw;
- }
- }
+ state = STRING_END;
else
escape = false;
break;
case IDENTIFIER:
- if(!isalpha(c) && !isdigit(c) && c!='_')
- parse_error(c, "0-9A-Za-z_");
+ if(!isalpha(c) && !isdigit(c) && c!='_' && c!='-' && c!='/')
+ throw parse_error(buf);
break;
+ case STRING_END:
+ throw parse_error(buf);
+
default:
- throw_at(InvalidState("Internal error (bad state)"), get_location());
+ throw logic_error("bad parser state");
}
if(is_delimiter(next) && state>=ACCEPT)
- return Token(token_type[state], buf);
+ {
+ if(state==IDENTIFIER && buf[0]=='\\')
+ return Token(Token::IDENTIFIER, buf.substr(1));
+ else if(state==STRING_END)
+ return Token(Token::STRING, c_unescape(buf.substr(1, buf.size()-2)));
+ else
+ return Token(token_type[state], buf);
+ }
}
return Token(Token::SPECIAL, "");
return (c>='0' && c<='7');
}
-string TextParser::get_location()
-{
- ostringstream ss;
- ss<<src<<':'<<in.get_line_number();
- return ss.str();
-}
-
-void TextParser::parse_error(int c, const char *e)
-{
- throw_at(ParseError(format("Parse error at '%c', expected one of \"%s\"", static_cast<char>(c), e)), get_location());
-}
-
} // namespace DataFile
} // namespace Msp
projects / libs / datafile.git / blobdiff