805 lines
25 KiB
C++
805 lines
25 KiB
C++
//== PrintfFormatString.cpp - Analysis of printf format strings --*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Handling of format string in printf and friends. The structure of format
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// strings for fprintf() are described in C99 7.19.6.1.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/Analyses/FormatString.h"
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#include "FormatStringParsing.h"
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#include "clang/Basic/TargetInfo.h"
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using clang::analyze_format_string::ArgType;
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using clang::analyze_format_string::FormatStringHandler;
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using clang::analyze_format_string::LengthModifier;
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using clang::analyze_format_string::OptionalAmount;
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using clang::analyze_format_string::ConversionSpecifier;
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using clang::analyze_printf::PrintfSpecifier;
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using namespace clang;
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typedef clang::analyze_format_string::SpecifierResult<PrintfSpecifier>
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PrintfSpecifierResult;
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//===----------------------------------------------------------------------===//
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// Methods for parsing format strings.
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//===----------------------------------------------------------------------===//
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using analyze_format_string::ParseNonPositionAmount;
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static bool ParsePrecision(FormatStringHandler &H, PrintfSpecifier &FS,
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const char *Start, const char *&Beg, const char *E,
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unsigned *argIndex) {
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if (argIndex) {
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FS.setPrecision(ParseNonPositionAmount(Beg, E, *argIndex));
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} else {
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const OptionalAmount Amt = ParsePositionAmount(H, Start, Beg, E,
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analyze_format_string::PrecisionPos);
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if (Amt.isInvalid())
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return true;
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FS.setPrecision(Amt);
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}
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return false;
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}
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static PrintfSpecifierResult ParsePrintfSpecifier(FormatStringHandler &H,
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const char *&Beg,
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const char *E,
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unsigned &argIndex,
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const LangOptions &LO,
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const TargetInfo &Target) {
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using namespace clang::analyze_format_string;
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using namespace clang::analyze_printf;
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const char *I = Beg;
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const char *Start = nullptr;
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UpdateOnReturn <const char*> UpdateBeg(Beg, I);
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// Look for a '%' character that indicates the start of a format specifier.
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for ( ; I != E ; ++I) {
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char c = *I;
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if (c == '\0') {
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// Detect spurious null characters, which are likely errors.
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H.HandleNullChar(I);
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return true;
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}
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if (c == '%') {
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Start = I++; // Record the start of the format specifier.
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break;
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}
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}
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// No format specifier found?
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if (!Start)
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return false;
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if (I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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PrintfSpecifier FS;
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if (ParseArgPosition(H, FS, Start, I, E))
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return true;
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if (I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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// Look for flags (if any).
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bool hasMore = true;
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for ( ; I != E; ++I) {
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switch (*I) {
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default: hasMore = false; break;
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case '\'':
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// FIXME: POSIX specific. Always accept?
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FS.setHasThousandsGrouping(I);
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break;
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case '-': FS.setIsLeftJustified(I); break;
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case '+': FS.setHasPlusPrefix(I); break;
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case ' ': FS.setHasSpacePrefix(I); break;
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case '#': FS.setHasAlternativeForm(I); break;
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case '0': FS.setHasLeadingZeros(I); break;
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}
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if (!hasMore)
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break;
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}
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if (I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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// Look for the field width (if any).
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if (ParseFieldWidth(H, FS, Start, I, E,
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FS.usesPositionalArg() ? nullptr : &argIndex))
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return true;
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if (I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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// Look for the precision (if any).
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if (*I == '.') {
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++I;
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if (I == E) {
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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if (ParsePrecision(H, FS, Start, I, E,
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FS.usesPositionalArg() ? nullptr : &argIndex))
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return true;
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if (I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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}
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// Look for the length modifier.
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if (ParseLengthModifier(FS, I, E, LO) && I == E) {
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// No more characters left?
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H.HandleIncompleteSpecifier(Start, E - Start);
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return true;
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}
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if (*I == '\0') {
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// Detect spurious null characters, which are likely errors.
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H.HandleNullChar(I);
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return true;
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}
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// Finally, look for the conversion specifier.
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const char *conversionPosition = I++;
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ConversionSpecifier::Kind k = ConversionSpecifier::InvalidSpecifier;
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switch (*conversionPosition) {
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default:
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break;
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// C99: 7.19.6.1 (section 8).
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case '%': k = ConversionSpecifier::PercentArg; break;
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case 'A': k = ConversionSpecifier::AArg; break;
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case 'E': k = ConversionSpecifier::EArg; break;
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case 'F': k = ConversionSpecifier::FArg; break;
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case 'G': k = ConversionSpecifier::GArg; break;
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case 'X': k = ConversionSpecifier::XArg; break;
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case 'a': k = ConversionSpecifier::aArg; break;
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case 'c': k = ConversionSpecifier::cArg; break;
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case 'd': k = ConversionSpecifier::dArg; break;
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case 'e': k = ConversionSpecifier::eArg; break;
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case 'f': k = ConversionSpecifier::fArg; break;
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case 'g': k = ConversionSpecifier::gArg; break;
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case 'i': k = ConversionSpecifier::iArg; break;
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case 'n': k = ConversionSpecifier::nArg; break;
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case 'o': k = ConversionSpecifier::oArg; break;
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case 'p': k = ConversionSpecifier::pArg; break;
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case 's': k = ConversionSpecifier::sArg; break;
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case 'u': k = ConversionSpecifier::uArg; break;
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case 'x': k = ConversionSpecifier::xArg; break;
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// POSIX specific.
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case 'C': k = ConversionSpecifier::CArg; break;
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case 'S': k = ConversionSpecifier::SArg; break;
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// Objective-C.
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case '@': k = ConversionSpecifier::ObjCObjArg; break;
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// Glibc specific.
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case 'm': k = ConversionSpecifier::PrintErrno; break;
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// FreeBSD format extensions
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case 'b':
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if (LO.FormatExtensions)
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k = ConversionSpecifier::FreeBSDbArg; // int followed by char *
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break;
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case 'r':
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if (LO.FormatExtensions)
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k = ConversionSpecifier::FreeBSDrArg;
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break;
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case 'y':
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if (LO.FormatExtensions)
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k = ConversionSpecifier::iArg;
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break;
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// Apple-specific
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case 'D':
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if (Target.getTriple().isOSDarwin())
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k = ConversionSpecifier::DArg;
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else if (LO.FormatExtensions)
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k = ConversionSpecifier::FreeBSDDArg; // u_char * followed by char *
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break;
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case 'O':
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if (Target.getTriple().isOSDarwin())
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k = ConversionSpecifier::OArg;
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break;
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case 'U':
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if (Target.getTriple().isOSDarwin())
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k = ConversionSpecifier::UArg;
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break;
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}
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PrintfConversionSpecifier CS(conversionPosition, k);
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FS.setConversionSpecifier(CS);
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if (CS.consumesDataArgument() && !FS.usesPositionalArg())
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FS.setArgIndex(argIndex++);
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// FreeBSD extension
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if (k == ConversionSpecifier::FreeBSDbArg ||
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k == ConversionSpecifier::FreeBSDDArg)
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argIndex++;
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if (k == ConversionSpecifier::InvalidSpecifier) {
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// Assume the conversion takes one argument.
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return !H.HandleInvalidPrintfConversionSpecifier(FS, Start, I - Start);
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}
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return PrintfSpecifierResult(Start, FS);
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}
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bool clang::analyze_format_string::ParsePrintfString(FormatStringHandler &H,
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const char *I,
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const char *E,
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const LangOptions &LO,
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const TargetInfo &Target) {
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unsigned argIndex = 0;
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// Keep looking for a format specifier until we have exhausted the string.
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while (I != E) {
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const PrintfSpecifierResult &FSR = ParsePrintfSpecifier(H, I, E, argIndex,
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LO, Target);
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// Did a fail-stop error of any kind occur when parsing the specifier?
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// If so, don't do any more processing.
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if (FSR.shouldStop())
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return true;
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// Did we exhaust the string or encounter an error that
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// we can recover from?
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if (!FSR.hasValue())
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continue;
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// We have a format specifier. Pass it to the callback.
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if (!H.HandlePrintfSpecifier(FSR.getValue(), FSR.getStart(),
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I - FSR.getStart()))
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return true;
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}
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assert(I == E && "Format string not exhausted");
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return false;
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}
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//===----------------------------------------------------------------------===//
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// Methods on PrintfSpecifier.
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//===----------------------------------------------------------------------===//
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ArgType PrintfSpecifier::getArgType(ASTContext &Ctx,
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bool IsObjCLiteral) const {
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const PrintfConversionSpecifier &CS = getConversionSpecifier();
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if (!CS.consumesDataArgument())
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return ArgType::Invalid();
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if (CS.getKind() == ConversionSpecifier::cArg)
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switch (LM.getKind()) {
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case LengthModifier::None: return Ctx.IntTy;
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case LengthModifier::AsLong:
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return ArgType(ArgType::WIntTy, "wint_t");
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default:
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return ArgType::Invalid();
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}
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if (CS.isIntArg())
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switch (LM.getKind()) {
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case LengthModifier::AsLongDouble:
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// GNU extension.
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return Ctx.LongLongTy;
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case LengthModifier::None:
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return Ctx.IntTy;
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case LengthModifier::AsInt32:
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return ArgType(Ctx.IntTy, "__int32");
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case LengthModifier::AsChar: return ArgType::AnyCharTy;
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case LengthModifier::AsShort: return Ctx.ShortTy;
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case LengthModifier::AsLong: return Ctx.LongTy;
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case LengthModifier::AsLongLong:
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case LengthModifier::AsQuad:
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return Ctx.LongLongTy;
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case LengthModifier::AsInt64:
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return ArgType(Ctx.LongLongTy, "__int64");
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case LengthModifier::AsIntMax:
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return ArgType(Ctx.getIntMaxType(), "intmax_t");
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case LengthModifier::AsSizeT:
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// FIXME: How to get the corresponding signed version of size_t?
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return ArgType();
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case LengthModifier::AsInt3264:
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return Ctx.getTargetInfo().getTriple().isArch64Bit()
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? ArgType(Ctx.LongLongTy, "__int64")
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: ArgType(Ctx.IntTy, "__int32");
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case LengthModifier::AsPtrDiff:
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return ArgType(Ctx.getPointerDiffType(), "ptrdiff_t");
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case LengthModifier::AsAllocate:
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case LengthModifier::AsMAllocate:
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return ArgType::Invalid();
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}
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if (CS.isUIntArg())
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switch (LM.getKind()) {
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case LengthModifier::AsLongDouble:
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// GNU extension.
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return Ctx.UnsignedLongLongTy;
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case LengthModifier::None:
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return Ctx.UnsignedIntTy;
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case LengthModifier::AsInt32:
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return ArgType(Ctx.UnsignedIntTy, "unsigned __int32");
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case LengthModifier::AsChar: return Ctx.UnsignedCharTy;
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case LengthModifier::AsShort: return Ctx.UnsignedShortTy;
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case LengthModifier::AsLong: return Ctx.UnsignedLongTy;
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case LengthModifier::AsLongLong:
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case LengthModifier::AsQuad:
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return Ctx.UnsignedLongLongTy;
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case LengthModifier::AsInt64:
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return ArgType(Ctx.UnsignedLongLongTy, "unsigned __int64");
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case LengthModifier::AsIntMax:
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return ArgType(Ctx.getUIntMaxType(), "uintmax_t");
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case LengthModifier::AsSizeT:
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return ArgType(Ctx.getSizeType(), "size_t");
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case LengthModifier::AsInt3264:
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return Ctx.getTargetInfo().getTriple().isArch64Bit()
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? ArgType(Ctx.UnsignedLongLongTy, "unsigned __int64")
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: ArgType(Ctx.UnsignedIntTy, "unsigned __int32");
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case LengthModifier::AsPtrDiff:
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// FIXME: How to get the corresponding unsigned
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// version of ptrdiff_t?
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return ArgType();
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case LengthModifier::AsAllocate:
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case LengthModifier::AsMAllocate:
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return ArgType::Invalid();
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}
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if (CS.isDoubleArg()) {
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if (LM.getKind() == LengthModifier::AsLongDouble)
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return Ctx.LongDoubleTy;
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return Ctx.DoubleTy;
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}
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if (CS.getKind() == ConversionSpecifier::nArg) {
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switch (LM.getKind()) {
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case LengthModifier::None:
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return ArgType::PtrTo(Ctx.IntTy);
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case LengthModifier::AsChar:
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return ArgType::PtrTo(Ctx.SignedCharTy);
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case LengthModifier::AsShort:
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return ArgType::PtrTo(Ctx.ShortTy);
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case LengthModifier::AsLong:
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return ArgType::PtrTo(Ctx.LongTy);
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case LengthModifier::AsLongLong:
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case LengthModifier::AsQuad:
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return ArgType::PtrTo(Ctx.LongLongTy);
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case LengthModifier::AsIntMax:
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return ArgType::PtrTo(ArgType(Ctx.getIntMaxType(), "intmax_t"));
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case LengthModifier::AsSizeT:
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return ArgType(); // FIXME: ssize_t
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case LengthModifier::AsPtrDiff:
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return ArgType::PtrTo(ArgType(Ctx.getPointerDiffType(), "ptrdiff_t"));
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case LengthModifier::AsLongDouble:
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return ArgType(); // FIXME: Is this a known extension?
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case LengthModifier::AsAllocate:
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case LengthModifier::AsMAllocate:
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case LengthModifier::AsInt32:
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case LengthModifier::AsInt3264:
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case LengthModifier::AsInt64:
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return ArgType::Invalid();
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}
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}
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switch (CS.getKind()) {
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case ConversionSpecifier::sArg:
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if (LM.getKind() == LengthModifier::AsWideChar) {
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if (IsObjCLiteral)
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return ArgType(Ctx.getPointerType(Ctx.UnsignedShortTy.withConst()),
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"const unichar *");
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return ArgType(ArgType::WCStrTy, "wchar_t *");
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}
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return ArgType::CStrTy;
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case ConversionSpecifier::SArg:
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if (IsObjCLiteral)
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return ArgType(Ctx.getPointerType(Ctx.UnsignedShortTy.withConst()),
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"const unichar *");
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return ArgType(ArgType::WCStrTy, "wchar_t *");
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case ConversionSpecifier::CArg:
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if (IsObjCLiteral)
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return ArgType(Ctx.UnsignedShortTy, "unichar");
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return ArgType(Ctx.WideCharTy, "wchar_t");
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case ConversionSpecifier::pArg:
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return ArgType::CPointerTy;
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case ConversionSpecifier::ObjCObjArg:
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return ArgType::ObjCPointerTy;
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default:
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break;
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}
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// FIXME: Handle other cases.
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return ArgType();
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}
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bool PrintfSpecifier::fixType(QualType QT, const LangOptions &LangOpt,
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ASTContext &Ctx, bool IsObjCLiteral) {
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// %n is different from other conversion specifiers; don't try to fix it.
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if (CS.getKind() == ConversionSpecifier::nArg)
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return false;
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// Handle Objective-C objects first. Note that while the '%@' specifier will
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// not warn for structure pointer or void pointer arguments (because that's
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// how CoreFoundation objects are implemented), we only show a fixit for '%@'
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// if we know it's an object (block, id, class, or __attribute__((NSObject))).
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if (QT->isObjCRetainableType()) {
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if (!IsObjCLiteral)
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return false;
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CS.setKind(ConversionSpecifier::ObjCObjArg);
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// Disable irrelevant flags
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HasThousandsGrouping = false;
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HasPlusPrefix = false;
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HasSpacePrefix = false;
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HasAlternativeForm = false;
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HasLeadingZeroes = false;
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Precision.setHowSpecified(OptionalAmount::NotSpecified);
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LM.setKind(LengthModifier::None);
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return true;
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}
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// Handle strings next (char *, wchar_t *)
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if (QT->isPointerType() && (QT->getPointeeType()->isAnyCharacterType())) {
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CS.setKind(ConversionSpecifier::sArg);
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// Disable irrelevant flags
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HasAlternativeForm = 0;
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HasLeadingZeroes = 0;
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// Set the long length modifier for wide characters
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if (QT->getPointeeType()->isWideCharType())
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LM.setKind(LengthModifier::AsWideChar);
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else
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LM.setKind(LengthModifier::None);
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return true;
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}
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// If it's an enum, get its underlying type.
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if (const EnumType *ETy = QT->getAs<EnumType>())
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QT = ETy->getDecl()->getIntegerType();
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// We can only work with builtin types.
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const BuiltinType *BT = QT->getAs<BuiltinType>();
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if (!BT)
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return false;
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// Set length modifier
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switch (BT->getKind()) {
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case BuiltinType::Bool:
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case BuiltinType::WChar_U:
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case BuiltinType::WChar_S:
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case BuiltinType::Char16:
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case BuiltinType::Char32:
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case BuiltinType::UInt128:
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case BuiltinType::Int128:
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case BuiltinType::Half:
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// Various types which are non-trivial to correct.
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return false;
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#define SIGNED_TYPE(Id, SingletonId)
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#define UNSIGNED_TYPE(Id, SingletonId)
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#define FLOATING_TYPE(Id, SingletonId)
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#define BUILTIN_TYPE(Id, SingletonId) \
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case BuiltinType::Id:
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#include "clang/AST/BuiltinTypes.def"
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// Misc other stuff which doesn't make sense here.
|
|
return false;
|
|
|
|
case BuiltinType::UInt:
|
|
case BuiltinType::Int:
|
|
case BuiltinType::Float:
|
|
case BuiltinType::Double:
|
|
LM.setKind(LengthModifier::None);
|
|
break;
|
|
|
|
case BuiltinType::Char_U:
|
|
case BuiltinType::UChar:
|
|
case BuiltinType::Char_S:
|
|
case BuiltinType::SChar:
|
|
LM.setKind(LengthModifier::AsChar);
|
|
break;
|
|
|
|
case BuiltinType::Short:
|
|
case BuiltinType::UShort:
|
|
LM.setKind(LengthModifier::AsShort);
|
|
break;
|
|
|
|
case BuiltinType::Long:
|
|
case BuiltinType::ULong:
|
|
LM.setKind(LengthModifier::AsLong);
|
|
break;
|
|
|
|
case BuiltinType::LongLong:
|
|
case BuiltinType::ULongLong:
|
|
LM.setKind(LengthModifier::AsLongLong);
|
|
break;
|
|
|
|
case BuiltinType::LongDouble:
|
|
LM.setKind(LengthModifier::AsLongDouble);
|
|
break;
|
|
}
|
|
|
|
// Handle size_t, ptrdiff_t, etc. that have dedicated length modifiers in C99.
|
|
if (isa<TypedefType>(QT) && (LangOpt.C99 || LangOpt.CPlusPlus11))
|
|
namedTypeToLengthModifier(QT, LM);
|
|
|
|
// If fixing the length modifier was enough, we might be done.
|
|
if (hasValidLengthModifier(Ctx.getTargetInfo())) {
|
|
// If we're going to offer a fix anyway, make sure the sign matches.
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::uArg:
|
|
case ConversionSpecifier::UArg:
|
|
if (QT->isSignedIntegerType())
|
|
CS.setKind(clang::analyze_format_string::ConversionSpecifier::dArg);
|
|
break;
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
if (QT->isUnsignedIntegerType() && !HasPlusPrefix)
|
|
CS.setKind(clang::analyze_format_string::ConversionSpecifier::uArg);
|
|
break;
|
|
default:
|
|
// Other specifiers do not have signed/unsigned variants.
|
|
break;
|
|
}
|
|
|
|
const analyze_printf::ArgType &ATR = getArgType(Ctx, IsObjCLiteral);
|
|
if (ATR.isValid() && ATR.matchesType(Ctx, QT))
|
|
return true;
|
|
}
|
|
|
|
// Set conversion specifier and disable any flags which do not apply to it.
|
|
// Let typedefs to char fall through to int, as %c is silly for uint8_t.
|
|
if (!isa<TypedefType>(QT) && QT->isCharType()) {
|
|
CS.setKind(ConversionSpecifier::cArg);
|
|
LM.setKind(LengthModifier::None);
|
|
Precision.setHowSpecified(OptionalAmount::NotSpecified);
|
|
HasAlternativeForm = 0;
|
|
HasLeadingZeroes = 0;
|
|
HasPlusPrefix = 0;
|
|
}
|
|
// Test for Floating type first as LongDouble can pass isUnsignedIntegerType
|
|
else if (QT->isRealFloatingType()) {
|
|
CS.setKind(ConversionSpecifier::fArg);
|
|
}
|
|
else if (QT->isSignedIntegerType()) {
|
|
CS.setKind(ConversionSpecifier::dArg);
|
|
HasAlternativeForm = 0;
|
|
}
|
|
else if (QT->isUnsignedIntegerType()) {
|
|
CS.setKind(ConversionSpecifier::uArg);
|
|
HasAlternativeForm = 0;
|
|
HasPlusPrefix = 0;
|
|
} else {
|
|
llvm_unreachable("Unexpected type");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void PrintfSpecifier::toString(raw_ostream &os) const {
|
|
// Whilst some features have no defined order, we are using the order
|
|
// appearing in the C99 standard (ISO/IEC 9899:1999 (E) 7.19.6.1)
|
|
os << "%";
|
|
|
|
// Positional args
|
|
if (usesPositionalArg()) {
|
|
os << getPositionalArgIndex() << "$";
|
|
}
|
|
|
|
// Conversion flags
|
|
if (IsLeftJustified) os << "-";
|
|
if (HasPlusPrefix) os << "+";
|
|
if (HasSpacePrefix) os << " ";
|
|
if (HasAlternativeForm) os << "#";
|
|
if (HasLeadingZeroes) os << "0";
|
|
|
|
// Minimum field width
|
|
FieldWidth.toString(os);
|
|
// Precision
|
|
Precision.toString(os);
|
|
// Length modifier
|
|
os << LM.toString();
|
|
// Conversion specifier
|
|
os << CS.toString();
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidPlusPrefix() const {
|
|
if (!HasPlusPrefix)
|
|
return true;
|
|
|
|
// The plus prefix only makes sense for signed conversions
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::eArg:
|
|
case ConversionSpecifier::EArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
case ConversionSpecifier::aArg:
|
|
case ConversionSpecifier::AArg:
|
|
case ConversionSpecifier::FreeBSDrArg:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidAlternativeForm() const {
|
|
if (!HasAlternativeForm)
|
|
return true;
|
|
|
|
// Alternate form flag only valid with the oxXaAeEfFgG conversions
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::oArg:
|
|
case ConversionSpecifier::OArg:
|
|
case ConversionSpecifier::xArg:
|
|
case ConversionSpecifier::XArg:
|
|
case ConversionSpecifier::aArg:
|
|
case ConversionSpecifier::AArg:
|
|
case ConversionSpecifier::eArg:
|
|
case ConversionSpecifier::EArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
case ConversionSpecifier::FreeBSDrArg:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidLeadingZeros() const {
|
|
if (!HasLeadingZeroes)
|
|
return true;
|
|
|
|
// Leading zeroes flag only valid with the diouxXaAeEfFgG conversions
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
case ConversionSpecifier::oArg:
|
|
case ConversionSpecifier::OArg:
|
|
case ConversionSpecifier::uArg:
|
|
case ConversionSpecifier::UArg:
|
|
case ConversionSpecifier::xArg:
|
|
case ConversionSpecifier::XArg:
|
|
case ConversionSpecifier::aArg:
|
|
case ConversionSpecifier::AArg:
|
|
case ConversionSpecifier::eArg:
|
|
case ConversionSpecifier::EArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidSpacePrefix() const {
|
|
if (!HasSpacePrefix)
|
|
return true;
|
|
|
|
// The space prefix only makes sense for signed conversions
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::eArg:
|
|
case ConversionSpecifier::EArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
case ConversionSpecifier::aArg:
|
|
case ConversionSpecifier::AArg:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidLeftJustified() const {
|
|
if (!IsLeftJustified)
|
|
return true;
|
|
|
|
// The left justified flag is valid for all conversions except n
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::nArg:
|
|
return false;
|
|
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidThousandsGroupingPrefix() const {
|
|
if (!HasThousandsGrouping)
|
|
return true;
|
|
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
case ConversionSpecifier::uArg:
|
|
case ConversionSpecifier::UArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool PrintfSpecifier::hasValidPrecision() const {
|
|
if (Precision.getHowSpecified() == OptionalAmount::NotSpecified)
|
|
return true;
|
|
|
|
// Precision is only valid with the diouxXaAeEfFgGs conversions
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::dArg:
|
|
case ConversionSpecifier::DArg:
|
|
case ConversionSpecifier::iArg:
|
|
case ConversionSpecifier::oArg:
|
|
case ConversionSpecifier::OArg:
|
|
case ConversionSpecifier::uArg:
|
|
case ConversionSpecifier::UArg:
|
|
case ConversionSpecifier::xArg:
|
|
case ConversionSpecifier::XArg:
|
|
case ConversionSpecifier::aArg:
|
|
case ConversionSpecifier::AArg:
|
|
case ConversionSpecifier::eArg:
|
|
case ConversionSpecifier::EArg:
|
|
case ConversionSpecifier::fArg:
|
|
case ConversionSpecifier::FArg:
|
|
case ConversionSpecifier::gArg:
|
|
case ConversionSpecifier::GArg:
|
|
case ConversionSpecifier::sArg:
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
bool PrintfSpecifier::hasValidFieldWidth() const {
|
|
if (FieldWidth.getHowSpecified() == OptionalAmount::NotSpecified)
|
|
return true;
|
|
|
|
// The field width is valid for all conversions except n
|
|
switch (CS.getKind()) {
|
|
case ConversionSpecifier::nArg:
|
|
return false;
|
|
|
|
default:
|
|
return true;
|
|
}
|
|
}
|