1 //===-- ParserInternals.h - Definitions internal to the parser --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header file defines the various variables that are shared among the
11 // different components of the parser...
13 //===----------------------------------------------------------------------===//
15 #ifndef PARSER_INTERNALS_H
16 #define PARSER_INTERNALS_H
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Function.h"
21 #include "llvm/Instructions.h"
22 #include "llvm/Assembly/Parser.h"
23 #include "llvm/ADT/StringExtras.h"
25 // Global variables exported from the lexer...
26 extern std::FILE *llvmAsmin;
27 extern int llvmAsmlineno;
29 // Globals exported by the parser...
30 extern char* llvmAsmtext;
31 extern int llvmAsmleng;
35 // Globals exported by the parser...
36 extern std::string CurFilename;
39 Module *RunVMAsmParser(const std::string &Filename, FILE *F);
42 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
43 // appropriate character. If AllowNull is set to false, a \00 value will cause
44 // an exception to be thrown.
46 // If AllowNull is set to true, the return value of the function points to the
47 // last character of the string in memory.
49 char *UnEscapeLexed(char *Buffer, bool AllowNull = false);
52 // ThrowException - Wrapper around the ParseException class that automatically
53 // fills in file line number and column number and options info.
55 // This also helps me because I keep typing 'throw new ParseException' instead
56 // of just 'throw ParseException'... sigh...
58 static inline void ThrowException(const std::string &message,
60 if (LineNo == -1) LineNo = llvmAsmlineno;
61 // TODO: column number in exception
62 throw ParseException(CurFilename, message, LineNo);
65 // ValID - Represents a reference of a definition of some sort. This may either
66 // be a numeric reference or a symbolic (%var) reference. This is just a
67 // discriminated union.
69 // Note that I can't implement this class in a straight forward manner with
70 // constructors and stuff because it goes in a union.
74 NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
75 ConstUndefVal, ConstantVal,
79 int Num; // If it's a numeric reference
80 char *Name; // If it's a named reference. Memory must be free'd.
81 int64_t ConstPool64; // Constant pool reference. This is the value
82 uint64_t UConstPool64;// Unsigned constant pool reference.
83 double ConstPoolFP; // Floating point constant pool reference
84 Constant *ConstantValue; // Fully resolved constant for ConstantVal case.
87 static ValID create(int Num) {
88 ValID D; D.Type = NumberVal; D.Num = Num; return D;
91 static ValID create(char *Name) {
92 ValID D; D.Type = NameVal; D.Name = Name; return D;
95 static ValID create(int64_t Val) {
96 ValID D; D.Type = ConstSIntVal; D.ConstPool64 = Val; return D;
99 static ValID create(uint64_t Val) {
100 ValID D; D.Type = ConstUIntVal; D.UConstPool64 = Val; return D;
103 static ValID create(double Val) {
104 ValID D; D.Type = ConstFPVal; D.ConstPoolFP = Val; return D;
107 static ValID createNull() {
108 ValID D; D.Type = ConstNullVal; return D;
111 static ValID createUndef() {
112 ValID D; D.Type = ConstUndefVal; return D;
115 static ValID create(Constant *Val) {
116 ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
119 inline void destroy() const {
121 free(Name); // Free this strdup'd memory...
124 inline ValID copy() const {
125 if (Type != NameVal) return *this;
126 ValID Result = *this;
127 Result.Name = strdup(Name);
131 inline std::string getName() const {
133 case NumberVal : return std::string("#") + itostr(Num);
134 case NameVal : return Name;
135 case ConstFPVal : return ftostr(ConstPoolFP);
136 case ConstNullVal : return "null";
137 case ConstUndefVal : return "undef";
139 case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
141 if (ConstantValue == ConstantBool::True) return "true";
142 if (ConstantValue == ConstantBool::False) return "false";
143 return "<constant expression>";
145 assert(0 && "Unknown value!");
151 bool operator<(const ValID &V) const {
152 if (Type != V.Type) return Type < V.Type;
154 case NumberVal: return Num < V.Num;
155 case NameVal: return strcmp(Name, V.Name) < 0;
156 case ConstSIntVal: return ConstPool64 < V.ConstPool64;
157 case ConstUIntVal: return UConstPool64 < V.UConstPool64;
158 case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
159 case ConstNullVal: return false;
160 case ConstUndefVal: return false;
161 case ConstantVal: return ConstantValue < V.ConstantValue;
162 default: assert(0 && "Unknown value type!"); return false;
167 } // End llvm namespace