3 #include <msp/core/maputils.h>
4 #include <msp/strings/format.h>
5 #include "argumentstore.h"
6 #include "binaryparser.h"
9 #include "loaderaction.h"
16 class bad_definition: public runtime_error
19 bad_definition(const std::string &w):
23 virtual ~bad_definition() throw() { }
26 class nesting_error: public logic_error
29 nesting_error(const std::string &w):
33 virtual ~nesting_error() throw() { }
37 BinaryParser::BinaryParser(Input &i, const string &s):
42 dict[-1] = StatementInfo("__kwd", "iss");
43 dict[-2] = StatementInfo("__str", "is");
44 dict[-3] = StatementInfo("__flt", "i");
47 Statement BinaryParser::parse()
49 const StatementKey *key;
58 key = &get_item(dict, id).key;
62 result.keyword = key->keyword;
65 for(unsigned j=0; j<key->signature.size(); ++j)
67 switch(key->signature[j])
69 case IntType::signature:
70 result.args.push_back(parse_int());
72 case FloatType::signature:
73 result.args.push_back(parse_float());
75 case StringType::signature:
76 result.args.push_back(parse_string());
78 case BoolType::signature:
79 result.args.push_back(parse_bool());
81 case SymbolType::signature:
82 result.args.push_back(parse_symbol());
87 if(!sub_remaining.empty())
88 --sub_remaining.back();
90 unsigned nsub = parse_int();
91 for(unsigned j = 0; j<nsub; ++j)
92 result.sub.push_back(parse());
100 void BinaryParser::process_control_statement(const Statement &st)
102 if(st.keyword=="__kwd")
104 int id = st.args[0].get<int>();
106 throw bad_definition("__kwd");
108 const string &kw = st.args[1].get<const string &>();
109 const string &args = st.args[2].get<const string &>();
110 for(string::const_iterator i=args.begin(); i!=args.end(); ++i)
111 for(unsigned j=0; valid_signatures[j]!=*i; ++j)
112 if(!valid_signatures[j])
113 throw bad_definition("__kwd");
115 dict[id] = StatementInfo(kw, args);
117 else if(st.keyword=="__str")
119 int id = st.args[0].get<int>();
121 throw bad_definition("__str");
123 strings[id] = st.args[1].get<const string &>();
125 else if(st.keyword=="__flt")
126 float_precision = st.args[0].get<unsigned>();
129 const StatementKey *BinaryParser::peek(unsigned level)
131 if(level>sub_remaining.size())
132 throw nesting_error("bad level");
133 while(level<sub_remaining.size())
135 // Discard any substatements that haven't been parsed yet
136 for(unsigned i=sub_remaining.back(); i-->0; )
138 sub_remaining.pop_back();
142 if(!sub_remaining.empty() && sub_remaining.back()==0)
144 // No more substatements on this level
150 return &cur_info->key;
152 int id = parse_int();
156 cur_info = &get_item(dict, id);
157 return &cur_info->key;
160 bool BinaryParser::parse_and_load(unsigned level, Loader &ldr, const LoaderAction &act)
162 if(!cur_info && !peek(level))
165 ArgumentStore args(*cur_info);
166 for(unsigned i=0; i<cur_info->key.signature.size(); ++i)
167 switch(cur_info->key.signature[i])
169 case IntType::signature:
170 args.set(i, parse_int());
172 case FloatType::signature:
173 args.set(i, parse_float());
175 case BoolType::signature:
176 args.set(i, parse_bool());
178 case StringType::signature:
179 args.set(i, parse_string());
181 case SymbolType::signature:
182 args.set(i, parse_symbol());
186 if(!sub_remaining.empty())
187 --sub_remaining.back();
188 sub_remaining.push_back(parse_int());
191 act.execute(ldr, args);
196 IntType::Store BinaryParser::parse_int()
198 IntType::Store result = 0;
205 result = (result<<7) | (c&0x7F);
212 const IntType::Store mask = 1LL<<(bits-1);
213 result = (result^mask)-mask;
218 FloatType::Store BinaryParser::parse_float()
221 for(unsigned i=0; i<float_precision; i+=8)
224 encoded = (encoded<<8) | (c&0xFF);
227 BinFloat bf = BinFloat::explode(encoded, float_precision);
229 if(numeric_limits<FloatType::Store>::is_iec559)
230 return bf.compose_iec559<FloatType::Store>();
233 /* Put the float together with arithmetic since we don't know its
235 FloatType::Store f = 0;
238 if(numeric_limits<FloatType::Store>::has_infinity)
239 f = numeric_limits<FloatType::Store>::infinity();
241 f = numeric_limits<FloatType::Store>::max();
245 for(unsigned i=0; i<64; ++i)
252 for(int i=0; i<bf.exponent; ++i)
254 for(int i=0; i>bf.exponent; --i)
263 BoolType::Store BinaryParser::parse_bool()
268 StringType::Store BinaryParser::parse_string()
270 int len = parse_int();
275 for(int i = 0; i<len; ++i)
280 return get_item(strings, -len);
283 SymbolType::Store BinaryParser::parse_symbol()
285 return get_item(strings, parse_int());
288 } // namespace DataFile