1 #ifndef LLVM_CLANG_LIB_ANALYSIS_FORMATSTRINGPARSING_H
2 #define LLVM_CLANG_LIB_ANALYSIS_FORMATSTRINGPARSING_H
4 #include "clang/AST/ASTContext.h"
5 #include "clang/AST/Type.h"
6 #include "clang/Analysis/Analyses/FormatString.h"
13 class UpdateOnReturn {
17 UpdateOnReturn(T &valueToUpdate, const T &valueToCopy)
18 : ValueToUpdate(valueToUpdate), ValueToCopy(valueToCopy) {}
21 ValueToUpdate = ValueToCopy;
25 namespace analyze_format_string {
27 OptionalAmount ParseAmount(const char *&Beg, const char *E);
28 OptionalAmount ParseNonPositionAmount(const char *&Beg, const char *E,
31 OptionalAmount ParsePositionAmount(FormatStringHandler &H,
32 const char *Start, const char *&Beg,
33 const char *E, PositionContext p);
35 bool ParseFieldWidth(FormatStringHandler &H,
37 const char *Start, const char *&Beg, const char *E,
40 bool ParseArgPosition(FormatStringHandler &H,
41 FormatSpecifier &CS, const char *Start,
42 const char *&Beg, const char *E);
44 /// Returns true if a LengthModifier was parsed and installed in the
45 /// FormatSpecifier& argument, and false otherwise.
46 bool ParseLengthModifier(FormatSpecifier &FS, const char *&Beg, const char *E,
47 const LangOptions &LO, bool IsScanf = false);
49 /// Returns true if the invalid specifier in \p SpecifierBegin is a UTF-8
50 /// string; check that it won't go further than \p FmtStrEnd and write
51 /// up the total size in \p Len.
52 bool ParseUTF8InvalidSpecifier(const char *SpecifierBegin,
53 const char *FmtStrEnd, unsigned &Len);
55 template <typename T> class SpecifierResult {
60 SpecifierResult(bool stop = false)
61 : Start(nullptr), Stop(stop) {}
62 SpecifierResult(const char *start,
64 : FS(fs), Start(start), Stop(false) {}
66 const char *getStart() const { return Start; }
67 bool shouldStop() const { return Stop; }
68 bool hasValue() const { return Start != nullptr; }
69 const T &getValue() const {
73 const T &getValue() { return FS; }
76 } // end analyze_format_string namespace
77 } // end clang namespace