1 #ifndef LLVM_CLANG_FORMAT_PARSING_H 2 #define LLVM_CLANG_FORMAT_PARSING_H 3 4 #include "clang/Analysis/Analyses/FormatString.h" 5 #include "clang/AST/ASTContext.h" 6 #include "clang/AST/Type.h" 7 #include "llvm/Support/raw_ostream.h" 8 9 namespace clang { 10 11 template <typename T> 12 class UpdateOnReturn { 13 T &ValueToUpdate; 14 const T &ValueToCopy; 15 public: 16 UpdateOnReturn(T &valueToUpdate, const T &valueToCopy) 17 : ValueToUpdate(valueToUpdate), ValueToCopy(valueToCopy) {} 18 19 ~UpdateOnReturn() { 20 ValueToUpdate = ValueToCopy; 21 } 22 }; 23 24 namespace analyze_format_string { 25 26 OptionalAmount ParseAmount(const char *&Beg, const char *E); 27 OptionalAmount ParseNonPositionAmount(const char *&Beg, const char *E, 28 unsigned &argIndex); 29 30 OptionalAmount ParsePositionAmount(FormatStringHandler &H, 31 const char *Start, const char *&Beg, 32 const char *E, PositionContext p); 33 34 bool ParseFieldWidth(FormatStringHandler &H, 35 FormatSpecifier &CS, 36 const char *Start, const char *&Beg, const char *E, 37 unsigned *argIndex); 38 39 bool ParseArgPosition(FormatStringHandler &H, 40 FormatSpecifier &CS, const char *Start, 41 const char *&Beg, const char *E); 42 43 /// Returns true if a LengthModifier was parsed and installed in the 44 /// FormatSpecifier& argument, and false otherwise. 45 bool ParseLengthModifier(FormatSpecifier &FS, const char *&Beg, const char *E); 46 47 template <typename T> class SpecifierResult { 48 T FS; 49 const char *Start; 50 bool Stop; 51 public: 52 SpecifierResult(bool stop = false) 53 : Start(0), Stop(stop) {} 54 SpecifierResult(const char *start, 55 const T &fs) 56 : FS(fs), Start(start), Stop(false) {} 57 58 const char *getStart() const { return Start; } 59 bool shouldStop() const { return Stop; } 60 bool hasValue() const { return Start != 0; } 61 const T &getValue() const { 62 assert(hasValue()); 63 return FS; 64 } 65 const T &getValue() { return FS; } 66 }; 67 68 } // end analyze_format_string namespace 69 } // end clang namespace 70 71 #endif 72 73
