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"
26 // Global variables exported from the lexer...
28 extern int llvmAsmlineno;
30 extern std::string &llvmAsmTextin;
32 // functions exported from the lexer
33 void set_scan_file(FILE * F);
34 void set_scan_string (const char * str);
36 // Globals exported by the parser...
37 extern char* llvmAsmtext;
38 extern int llvmAsmleng;
42 // Globals exported by the parser...
43 extern std::string CurFilename;
46 Module *RunVMAsmParser(const std::string &Filename, FILE *F);
48 // Parse a string directly
49 Module *RunVMAsmParser(const char * AsmString, Module * M);
52 // UnEscapeLexed - Run through the specified buffer and change \xx codes to the
53 // appropriate character. If AllowNull is set to false, a \00 value will cause
54 // an exception to be thrown.
56 // If AllowNull is set to true, the return value of the function points to the
57 // last character of the string in memory.
59 char *UnEscapeLexed(char *Buffer, bool AllowNull = false);
62 // ThrowException - Wrapper around the ParseException class that automatically
63 // fills in file line number and column number and options info.
65 // This also helps me because I keep typing 'throw new ParseException' instead
66 // of just 'throw ParseException'... sigh...
68 static inline void ThrowException(const std::string &message,
70 if (LineNo == -1) LineNo = llvmAsmlineno;
71 // TODO: column number in exception
72 throw ParseException(CurFilename, message, LineNo);
75 // ValID - Represents a reference of a definition of some sort. This may either
76 // be a numeric reference or a symbolic (%var) reference. This is just a
77 // discriminated union.
79 // Note that I can't implement this class in a straight forward manner with
80 // constructors and stuff because it goes in a union.
84 NumberVal, NameVal, ConstSIntVal, ConstUIntVal, ConstFPVal, ConstNullVal,
85 ConstUndefVal, ConstantVal,
89 int Num; // If it's a numeric reference
90 char *Name; // If it's a named reference. Memory must be free'd.
91 int64_t ConstPool64; // Constant pool reference. This is the value
92 uint64_t UConstPool64;// Unsigned constant pool reference.
93 double ConstPoolFP; // Floating point constant pool reference
94 Constant *ConstantValue; // Fully resolved constant for ConstantVal case.
97 static ValID create(int Num) {
98 ValID D; D.Type = NumberVal; D.Num = Num; return D;
101 static ValID create(char *Name) {
102 ValID D; D.Type = NameVal; D.Name = Name; return D;
105 static ValID create(int64_t Val) {
106 ValID D; D.Type = ConstSIntVal; D.ConstPool64 = Val; return D;
109 static ValID create(uint64_t Val) {
110 ValID D; D.Type = ConstUIntVal; D.UConstPool64 = Val; return D;
113 static ValID create(double Val) {
114 ValID D; D.Type = ConstFPVal; D.ConstPoolFP = Val; return D;
117 static ValID createNull() {
118 ValID D; D.Type = ConstNullVal; return D;
121 static ValID createUndef() {
122 ValID D; D.Type = ConstUndefVal; return D;
125 static ValID create(Constant *Val) {
126 ValID D; D.Type = ConstantVal; D.ConstantValue = Val; return D;
129 inline void destroy() const {
131 free(Name); // Free this strdup'd memory...
134 inline ValID copy() const {
135 if (Type != NameVal) return *this;
136 ValID Result = *this;
137 Result.Name = strdup(Name);
141 inline std::string getName() const {
143 case NumberVal : return std::string("#") + itostr(Num);
144 case NameVal : return Name;
145 case ConstFPVal : return ftostr(ConstPoolFP);
146 case ConstNullVal : return "null";
147 case ConstUndefVal : return "undef";
149 case ConstSIntVal : return std::string("%") + itostr(ConstPool64);
151 if (ConstantValue == ConstantBool::True) return "true";
152 if (ConstantValue == ConstantBool::False) return "false";
153 return "<constant expression>";
155 assert(0 && "Unknown value!");
161 bool operator<(const ValID &V) const {
162 if (Type != V.Type) return Type < V.Type;
164 case NumberVal: return Num < V.Num;
165 case NameVal: return strcmp(Name, V.Name) < 0;
166 case ConstSIntVal: return ConstPool64 < V.ConstPool64;
167 case ConstUIntVal: return UConstPool64 < V.UConstPool64;
168 case ConstFPVal: return ConstPoolFP < V.ConstPoolFP;
169 case ConstNullVal: return false;
170 case ConstUndefVal: return false;
171 case ConstantVal: return ConstantValue < V.ConstantValue;
172 default: assert(0 && "Unknown value type!"); return false;
177 } // End llvm namespace