Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 1 | // FormatString.cpp - Common stuff for handling printf/scanf formats -*- C++ -*- |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // Shared details for processing format strings of printf and scanf |
| 11 | // (and friends). |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #include "FormatStringParsing.h" |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 16 | #include "clang/Basic/LangOptions.h" |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 17 | #include "clang/Basic/TargetInfo.h" |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 18 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 19 | using clang::analyze_format_string::ArgType; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 20 | using clang::analyze_format_string::FormatStringHandler; |
| 21 | using clang::analyze_format_string::FormatSpecifier; |
| 22 | using clang::analyze_format_string::LengthModifier; |
| 23 | using clang::analyze_format_string::OptionalAmount; |
| 24 | using clang::analyze_format_string::PositionContext; |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 25 | using clang::analyze_format_string::ConversionSpecifier; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 26 | using namespace clang; |
| 27 | |
| 28 | // Key function to FormatStringHandler. |
| 29 | FormatStringHandler::~FormatStringHandler() {} |
| 30 | |
| 31 | //===----------------------------------------------------------------------===// |
| 32 | // Functions for parsing format strings components in both printf and |
| 33 | // scanf format strings. |
| 34 | //===----------------------------------------------------------------------===// |
| 35 | |
| 36 | OptionalAmount |
| 37 | clang::analyze_format_string::ParseAmount(const char *&Beg, const char *E) { |
| 38 | const char *I = Beg; |
| 39 | UpdateOnReturn <const char*> UpdateBeg(Beg, I); |
| 40 | |
| 41 | unsigned accumulator = 0; |
| 42 | bool hasDigits = false; |
| 43 | |
| 44 | for ( ; I != E; ++I) { |
| 45 | char c = *I; |
| 46 | if (c >= '0' && c <= '9') { |
| 47 | hasDigits = true; |
| 48 | accumulator = (accumulator * 10) + (c - '0'); |
| 49 | continue; |
| 50 | } |
| 51 | |
| 52 | if (hasDigits) |
| 53 | return OptionalAmount(OptionalAmount::Constant, accumulator, Beg, I - Beg, |
| 54 | false); |
| 55 | |
| 56 | break; |
| 57 | } |
| 58 | |
| 59 | return OptionalAmount(); |
| 60 | } |
| 61 | |
| 62 | OptionalAmount |
| 63 | clang::analyze_format_string::ParseNonPositionAmount(const char *&Beg, |
| 64 | const char *E, |
| 65 | unsigned &argIndex) { |
| 66 | if (*Beg == '*') { |
| 67 | ++Beg; |
| 68 | return OptionalAmount(OptionalAmount::Arg, argIndex++, Beg, 0, false); |
| 69 | } |
| 70 | |
| 71 | return ParseAmount(Beg, E); |
| 72 | } |
| 73 | |
| 74 | OptionalAmount |
| 75 | clang::analyze_format_string::ParsePositionAmount(FormatStringHandler &H, |
| 76 | const char *Start, |
| 77 | const char *&Beg, |
| 78 | const char *E, |
| 79 | PositionContext p) { |
| 80 | if (*Beg == '*') { |
| 81 | const char *I = Beg + 1; |
| 82 | const OptionalAmount &Amt = ParseAmount(I, E); |
| 83 | |
| 84 | if (Amt.getHowSpecified() == OptionalAmount::NotSpecified) { |
| 85 | H.HandleInvalidPosition(Beg, I - Beg, p); |
| 86 | return OptionalAmount(false); |
| 87 | } |
| 88 | |
| 89 | if (I == E) { |
| 90 | // No more characters left? |
| 91 | H.HandleIncompleteSpecifier(Start, E - Start); |
| 92 | return OptionalAmount(false); |
| 93 | } |
| 94 | |
| 95 | assert(Amt.getHowSpecified() == OptionalAmount::Constant); |
| 96 | |
| 97 | if (*I == '$') { |
| 98 | // Handle positional arguments |
| 99 | |
| 100 | // Special case: '*0$', since this is an easy mistake. |
| 101 | if (Amt.getConstantAmount() == 0) { |
| 102 | H.HandleZeroPosition(Beg, I - Beg + 1); |
| 103 | return OptionalAmount(false); |
| 104 | } |
| 105 | |
| 106 | const char *Tmp = Beg; |
| 107 | Beg = ++I; |
| 108 | |
| 109 | return OptionalAmount(OptionalAmount::Arg, Amt.getConstantAmount() - 1, |
| 110 | Tmp, 0, true); |
| 111 | } |
| 112 | |
| 113 | H.HandleInvalidPosition(Beg, I - Beg, p); |
| 114 | return OptionalAmount(false); |
| 115 | } |
| 116 | |
| 117 | return ParseAmount(Beg, E); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | bool |
| 122 | clang::analyze_format_string::ParseFieldWidth(FormatStringHandler &H, |
| 123 | FormatSpecifier &CS, |
| 124 | const char *Start, |
| 125 | const char *&Beg, const char *E, |
| 126 | unsigned *argIndex) { |
| 127 | // FIXME: Support negative field widths. |
| 128 | if (argIndex) { |
| 129 | CS.setFieldWidth(ParseNonPositionAmount(Beg, E, *argIndex)); |
| 130 | } |
| 131 | else { |
| 132 | const OptionalAmount Amt = |
| 133 | ParsePositionAmount(H, Start, Beg, E, |
| 134 | analyze_format_string::FieldWidthPos); |
| 135 | |
| 136 | if (Amt.isInvalid()) |
| 137 | return true; |
| 138 | CS.setFieldWidth(Amt); |
| 139 | } |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | bool |
| 144 | clang::analyze_format_string::ParseArgPosition(FormatStringHandler &H, |
| 145 | FormatSpecifier &FS, |
| 146 | const char *Start, |
| 147 | const char *&Beg, |
| 148 | const char *E) { |
| 149 | const char *I = Beg; |
| 150 | |
| 151 | const OptionalAmount &Amt = ParseAmount(I, E); |
| 152 | |
| 153 | if (I == E) { |
| 154 | // No more characters left? |
| 155 | H.HandleIncompleteSpecifier(Start, E - Start); |
| 156 | return true; |
| 157 | } |
| 158 | |
| 159 | if (Amt.getHowSpecified() == OptionalAmount::Constant && *(I++) == '$') { |
Hans Wennborg | f856264 | 2012-03-09 10:10:54 +0000 | [diff] [blame] | 160 | // Warn that positional arguments are non-standard. |
| 161 | H.HandlePosition(Start, I - Start); |
| 162 | |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 163 | // Special case: '%0$', since this is an easy mistake. |
| 164 | if (Amt.getConstantAmount() == 0) { |
| 165 | H.HandleZeroPosition(Start, I - Start); |
| 166 | return true; |
| 167 | } |
| 168 | |
| 169 | FS.setArgIndex(Amt.getConstantAmount() - 1); |
| 170 | FS.setUsesPositionalArg(); |
| 171 | // Update the caller's pointer if we decided to consume |
| 172 | // these characters. |
| 173 | Beg = I; |
| 174 | return false; |
| 175 | } |
| 176 | |
| 177 | return false; |
| 178 | } |
| 179 | |
| 180 | bool |
| 181 | clang::analyze_format_string::ParseLengthModifier(FormatSpecifier &FS, |
| 182 | const char *&I, |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 183 | const char *E, |
| 184 | const LangOptions &LO, |
| 185 | bool IsScanf) { |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 186 | LengthModifier::Kind lmKind = LengthModifier::None; |
| 187 | const char *lmPosition = I; |
| 188 | switch (*I) { |
| 189 | default: |
| 190 | return false; |
| 191 | case 'h': |
| 192 | ++I; |
Ted Kremenek | 6ca4a9a | 2011-10-25 04:20:41 +0000 | [diff] [blame] | 193 | lmKind = (I != E && *I == 'h') ? (++I, LengthModifier::AsChar) |
| 194 | : LengthModifier::AsShort; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 195 | break; |
| 196 | case 'l': |
| 197 | ++I; |
Ted Kremenek | 6ca4a9a | 2011-10-25 04:20:41 +0000 | [diff] [blame] | 198 | lmKind = (I != E && *I == 'l') ? (++I, LengthModifier::AsLongLong) |
| 199 | : LengthModifier::AsLong; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 200 | break; |
| 201 | case 'j': lmKind = LengthModifier::AsIntMax; ++I; break; |
| 202 | case 'z': lmKind = LengthModifier::AsSizeT; ++I; break; |
| 203 | case 't': lmKind = LengthModifier::AsPtrDiff; ++I; break; |
| 204 | case 'L': lmKind = LengthModifier::AsLongDouble; ++I; break; |
Hans Wennborg | 32addd5 | 2012-02-16 16:34:54 +0000 | [diff] [blame] | 205 | case 'q': lmKind = LengthModifier::AsQuad; ++I; break; |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 206 | case 'a': |
Richard Smith | 80ad52f | 2013-01-02 11:42:31 +0000 | [diff] [blame] | 207 | if (IsScanf && !LO.C99 && !LO.CPlusPlus11) { |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 208 | // For scanf in C90, look at the next character to see if this should |
| 209 | // be parsed as the GNU extension 'a' length modifier. If not, this |
| 210 | // will be parsed as a conversion specifier. |
| 211 | ++I; |
| 212 | if (I != E && (*I == 's' || *I == 'S' || *I == '[')) { |
| 213 | lmKind = LengthModifier::AsAllocate; |
| 214 | break; |
| 215 | } |
| 216 | --I; |
| 217 | } |
| 218 | return false; |
Hans Wennborg | 37969b7 | 2012-01-12 17:11:12 +0000 | [diff] [blame] | 219 | case 'm': |
| 220 | if (IsScanf) { |
| 221 | lmKind = LengthModifier::AsMAllocate; |
| 222 | ++I; |
| 223 | break; |
| 224 | } |
| 225 | return false; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 226 | } |
| 227 | LengthModifier lm(lmPosition, lmKind); |
| 228 | FS.setLengthModifier(lm); |
| 229 | return true; |
| 230 | } |
| 231 | |
| 232 | //===----------------------------------------------------------------------===// |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 233 | // Methods on ArgType. |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 234 | //===----------------------------------------------------------------------===// |
| 235 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 236 | bool ArgType::matchesType(ASTContext &C, QualType argTy) const { |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 237 | if (Ptr) { |
| 238 | // It has to be a pointer. |
| 239 | const PointerType *PT = argTy->getAs<PointerType>(); |
| 240 | if (!PT) |
| 241 | return false; |
| 242 | |
| 243 | // We cannot write through a const qualified pointer. |
| 244 | if (PT->getPointeeType().isConstQualified()) |
| 245 | return false; |
| 246 | |
| 247 | argTy = PT->getPointeeType(); |
| 248 | } |
| 249 | |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 250 | switch (K) { |
| 251 | case InvalidTy: |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 252 | llvm_unreachable("ArgType must be valid"); |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 253 | |
| 254 | case UnknownTy: |
| 255 | return true; |
Ted Kremenek | 6ca4a9a | 2011-10-25 04:20:41 +0000 | [diff] [blame] | 256 | |
| 257 | case AnyCharTy: { |
Jordan Rose | ee0259d | 2012-06-04 22:48:57 +0000 | [diff] [blame] | 258 | if (const EnumType *ETy = argTy->getAs<EnumType>()) |
| 259 | argTy = ETy->getDecl()->getIntegerType(); |
| 260 | |
Ted Kremenek | 6ca4a9a | 2011-10-25 04:20:41 +0000 | [diff] [blame] | 261 | if (const BuiltinType *BT = argTy->getAs<BuiltinType>()) |
| 262 | switch (BT->getKind()) { |
| 263 | default: |
| 264 | break; |
| 265 | case BuiltinType::Char_S: |
| 266 | case BuiltinType::SChar: |
| 267 | case BuiltinType::UChar: |
| 268 | case BuiltinType::Char_U: |
| 269 | return true; |
| 270 | } |
| 271 | return false; |
| 272 | } |
| 273 | |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 274 | case SpecificTy: { |
Jordan Rose | ee0259d | 2012-06-04 22:48:57 +0000 | [diff] [blame] | 275 | if (const EnumType *ETy = argTy->getAs<EnumType>()) |
| 276 | argTy = ETy->getDecl()->getIntegerType(); |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 277 | argTy = C.getCanonicalType(argTy).getUnqualifiedType(); |
Jordan Rose | ee0259d | 2012-06-04 22:48:57 +0000 | [diff] [blame] | 278 | |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 279 | if (T == argTy) |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 280 | return true; |
Ted Kremenek | dc00d81 | 2011-07-13 17:35:14 +0000 | [diff] [blame] | 281 | // Check for "compatible types". |
Ted Kremenek | 1ad35be | 2011-07-14 17:05:32 +0000 | [diff] [blame] | 282 | if (const BuiltinType *BT = argTy->getAs<BuiltinType>()) |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 283 | switch (BT->getKind()) { |
| 284 | default: |
| 285 | break; |
| 286 | case BuiltinType::Char_S: |
| 287 | case BuiltinType::SChar: |
Ted Kremenek | dc00d81 | 2011-07-13 17:35:14 +0000 | [diff] [blame] | 288 | case BuiltinType::Char_U: |
Ted Kremenek | 1ad35be | 2011-07-14 17:05:32 +0000 | [diff] [blame] | 289 | case BuiltinType::UChar: |
Hans Wennborg | 101d4e0 | 2012-05-08 17:21:31 +0000 | [diff] [blame] | 290 | return T == C.UnsignedCharTy || T == C.SignedCharTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 291 | case BuiltinType::Short: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 292 | return T == C.UnsignedShortTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 293 | case BuiltinType::UShort: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 294 | return T == C.ShortTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 295 | case BuiltinType::Int: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 296 | return T == C.UnsignedIntTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 297 | case BuiltinType::UInt: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 298 | return T == C.IntTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 299 | case BuiltinType::Long: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 300 | return T == C.UnsignedLongTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 301 | case BuiltinType::ULong: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 302 | return T == C.LongTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 303 | case BuiltinType::LongLong: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 304 | return T == C.UnsignedLongLongTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 305 | case BuiltinType::ULongLong: |
Nick Lewycky | 687b5df | 2011-12-02 23:21:43 +0000 | [diff] [blame] | 306 | return T == C.LongLongTy; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 307 | } |
| 308 | return false; |
| 309 | } |
| 310 | |
| 311 | case CStrTy: { |
| 312 | const PointerType *PT = argTy->getAs<PointerType>(); |
| 313 | if (!PT) |
| 314 | return false; |
| 315 | QualType pointeeTy = PT->getPointeeType(); |
| 316 | if (const BuiltinType *BT = pointeeTy->getAs<BuiltinType>()) |
| 317 | switch (BT->getKind()) { |
| 318 | case BuiltinType::Void: |
| 319 | case BuiltinType::Char_U: |
| 320 | case BuiltinType::UChar: |
| 321 | case BuiltinType::Char_S: |
| 322 | case BuiltinType::SChar: |
| 323 | return true; |
| 324 | default: |
| 325 | break; |
| 326 | } |
| 327 | |
| 328 | return false; |
| 329 | } |
| 330 | |
| 331 | case WCStrTy: { |
| 332 | const PointerType *PT = argTy->getAs<PointerType>(); |
| 333 | if (!PT) |
| 334 | return false; |
| 335 | QualType pointeeTy = |
| 336 | C.getCanonicalType(PT->getPointeeType()).getUnqualifiedType(); |
| 337 | return pointeeTy == C.getWCharType(); |
| 338 | } |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 339 | |
| 340 | case WIntTy: { |
James Molloy | 392da48 | 2012-05-04 10:55:22 +0000 | [diff] [blame] | 341 | |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 342 | QualType PromoArg = |
| 343 | argTy->isPromotableIntegerType() |
| 344 | ? C.getPromotedIntegerType(argTy) : argTy; |
| 345 | |
James Molloy | 392da48 | 2012-05-04 10:55:22 +0000 | [diff] [blame] | 346 | QualType WInt = C.getCanonicalType(C.getWIntType()).getUnqualifiedType(); |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 347 | PromoArg = C.getCanonicalType(PromoArg).getUnqualifiedType(); |
| 348 | |
James Molloy | 392da48 | 2012-05-04 10:55:22 +0000 | [diff] [blame] | 349 | // If the promoted argument is the corresponding signed type of the |
| 350 | // wint_t type, then it should match. |
| 351 | if (PromoArg->hasSignedIntegerRepresentation() && |
| 352 | C.getCorrespondingUnsignedType(PromoArg) == WInt) |
| 353 | return true; |
| 354 | |
| 355 | return WInt == PromoArg; |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 356 | } |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 357 | |
| 358 | case CPointerTy: |
Anders Carlsson | 6242599 | 2010-11-06 14:58:53 +0000 | [diff] [blame] | 359 | return argTy->isPointerType() || argTy->isObjCObjectPointerType() || |
Ted Kremenek | afcd195 | 2012-03-15 21:22:27 +0000 | [diff] [blame] | 360 | argTy->isBlockPointerType() || argTy->isNullPtrType(); |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 361 | |
Ted Kremenek | b4a3ef7 | 2012-02-06 21:45:29 +0000 | [diff] [blame] | 362 | case ObjCPointerTy: { |
| 363 | if (argTy->getAs<ObjCObjectPointerType>() || |
| 364 | argTy->getAs<BlockPointerType>()) |
| 365 | return true; |
| 366 | |
| 367 | // Handle implicit toll-free bridging. |
| 368 | if (const PointerType *PT = argTy->getAs<PointerType>()) { |
| 369 | // Things such as CFTypeRef are really just opaque pointers |
| 370 | // to C structs representing CF types that can often be bridged |
| 371 | // to Objective-C objects. Since the compiler doesn't know which |
| 372 | // structs can be toll-free bridged, we just accept them all. |
| 373 | QualType pointee = PT->getPointeeType(); |
| 374 | if (pointee->getAsStructureType() || pointee->isVoidType()) |
| 375 | return true; |
| 376 | } |
| 377 | return false; |
| 378 | } |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 379 | } |
| 380 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 381 | llvm_unreachable("Invalid ArgType Kind!"); |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 382 | } |
| 383 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 384 | QualType ArgType::getRepresentativeType(ASTContext &C) const { |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 385 | QualType Res; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 386 | switch (K) { |
| 387 | case InvalidTy: |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 388 | llvm_unreachable("No representative type for Invalid ArgType"); |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 389 | case UnknownTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 390 | llvm_unreachable("No representative type for Unknown ArgType"); |
Ted Kremenek | 6ca4a9a | 2011-10-25 04:20:41 +0000 | [diff] [blame] | 391 | case AnyCharTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 392 | Res = C.CharTy; |
| 393 | break; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 394 | case SpecificTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 395 | Res = T; |
| 396 | break; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 397 | case CStrTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 398 | Res = C.getPointerType(C.CharTy); |
| 399 | break; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 400 | case WCStrTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 401 | Res = C.getPointerType(C.getWCharType()); |
| 402 | break; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 403 | case ObjCPointerTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 404 | Res = C.ObjCBuiltinIdTy; |
| 405 | break; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 406 | case CPointerTy: |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 407 | Res = C.VoidPtrTy; |
| 408 | break; |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 409 | case WIntTy: { |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 410 | Res = C.getWIntType(); |
| 411 | break; |
Ted Kremenek | 9325eaf | 2010-08-24 22:24:51 +0000 | [diff] [blame] | 412 | } |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 413 | } |
| 414 | |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 415 | if (Ptr) |
| 416 | Res = C.getPointerType(Res); |
| 417 | return Res; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 418 | } |
| 419 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 420 | std::string ArgType::getRepresentativeTypeName(ASTContext &C) const { |
Hans Wennborg | f4f0c60 | 2011-12-09 12:22:12 +0000 | [diff] [blame] | 421 | std::string S = getRepresentativeType(C).getAsString(); |
Hans Wennborg | 58e1e54 | 2012-08-07 08:59:46 +0000 | [diff] [blame] | 422 | |
| 423 | std::string Alias; |
| 424 | if (Name) { |
| 425 | // Use a specific name for this type, e.g. "size_t". |
| 426 | Alias = Name; |
| 427 | if (Ptr) { |
| 428 | // If ArgType is actually a pointer to T, append an asterisk. |
| 429 | Alias += (Alias[Alias.size()-1] == '*') ? "*" : " *"; |
| 430 | } |
| 431 | // If Alias is the same as the underlying type, e.g. wchar_t, then drop it. |
| 432 | if (S == Alias) |
| 433 | Alias.clear(); |
| 434 | } |
| 435 | |
| 436 | if (!Alias.empty()) |
| 437 | return std::string("'") + Alias + "' (aka '" + S + "')"; |
Hans Wennborg | f4f0c60 | 2011-12-09 12:22:12 +0000 | [diff] [blame] | 438 | return std::string("'") + S + "'"; |
Hans Wennborg | a792aff | 2011-12-07 10:33:11 +0000 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 442 | //===----------------------------------------------------------------------===// |
| 443 | // Methods on OptionalAmount. |
| 444 | //===----------------------------------------------------------------------===// |
| 445 | |
Hans Wennborg | f3749f4 | 2012-08-07 08:11:26 +0000 | [diff] [blame] | 446 | ArgType |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 447 | analyze_format_string::OptionalAmount::getArgType(ASTContext &Ctx) const { |
| 448 | return Ctx.IntTy; |
| 449 | } |
| 450 | |
| 451 | //===----------------------------------------------------------------------===// |
| 452 | // Methods on LengthModifier. |
| 453 | //===----------------------------------------------------------------------===// |
| 454 | |
| 455 | const char * |
| 456 | analyze_format_string::LengthModifier::toString() const { |
| 457 | switch (kind) { |
| 458 | case AsChar: |
| 459 | return "hh"; |
| 460 | case AsShort: |
| 461 | return "h"; |
| 462 | case AsLong: // or AsWideChar |
| 463 | return "l"; |
| 464 | case AsLongLong: |
| 465 | return "ll"; |
Hans Wennborg | 32addd5 | 2012-02-16 16:34:54 +0000 | [diff] [blame] | 466 | case AsQuad: |
| 467 | return "q"; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 468 | case AsIntMax: |
| 469 | return "j"; |
| 470 | case AsSizeT: |
| 471 | return "z"; |
| 472 | case AsPtrDiff: |
| 473 | return "t"; |
| 474 | case AsLongDouble: |
| 475 | return "L"; |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 476 | case AsAllocate: |
| 477 | return "a"; |
Hans Wennborg | 37969b7 | 2012-01-12 17:11:12 +0000 | [diff] [blame] | 478 | case AsMAllocate: |
| 479 | return "m"; |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 480 | case None: |
| 481 | return ""; |
| 482 | } |
| 483 | return NULL; |
| 484 | } |
| 485 | |
| 486 | //===----------------------------------------------------------------------===// |
Hans Wennborg | b8ec3e3 | 2011-12-09 11:11:07 +0000 | [diff] [blame] | 487 | // Methods on ConversionSpecifier. |
| 488 | //===----------------------------------------------------------------------===// |
| 489 | |
| 490 | const char *ConversionSpecifier::toString() const { |
| 491 | switch (kind) { |
| 492 | case dArg: return "d"; |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 493 | case DArg: return "D"; |
Hans Wennborg | b8ec3e3 | 2011-12-09 11:11:07 +0000 | [diff] [blame] | 494 | case iArg: return "i"; |
| 495 | case oArg: return "o"; |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 496 | case OArg: return "O"; |
Hans Wennborg | b8ec3e3 | 2011-12-09 11:11:07 +0000 | [diff] [blame] | 497 | case uArg: return "u"; |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 498 | case UArg: return "U"; |
Hans Wennborg | b8ec3e3 | 2011-12-09 11:11:07 +0000 | [diff] [blame] | 499 | case xArg: return "x"; |
| 500 | case XArg: return "X"; |
| 501 | case fArg: return "f"; |
| 502 | case FArg: return "F"; |
| 503 | case eArg: return "e"; |
| 504 | case EArg: return "E"; |
| 505 | case gArg: return "g"; |
| 506 | case GArg: return "G"; |
| 507 | case aArg: return "a"; |
| 508 | case AArg: return "A"; |
| 509 | case cArg: return "c"; |
| 510 | case sArg: return "s"; |
| 511 | case pArg: return "p"; |
| 512 | case nArg: return "n"; |
| 513 | case PercentArg: return "%"; |
| 514 | case ScanListArg: return "["; |
| 515 | case InvalidSpecifier: return NULL; |
| 516 | |
| 517 | // MacOS X unicode extensions. |
| 518 | case CArg: return "C"; |
| 519 | case SArg: return "S"; |
| 520 | |
| 521 | // Objective-C specific specifiers. |
| 522 | case ObjCObjArg: return "@"; |
| 523 | |
| 524 | // GlibC specific specifiers. |
| 525 | case PrintErrno: return "m"; |
| 526 | } |
| 527 | return NULL; |
| 528 | } |
| 529 | |
Jordan Rose | 670941c | 2012-09-13 02:11:15 +0000 | [diff] [blame] | 530 | llvm::Optional<ConversionSpecifier> |
| 531 | ConversionSpecifier::getStandardSpecifier() const { |
| 532 | ConversionSpecifier::Kind NewKind; |
| 533 | |
| 534 | switch (getKind()) { |
| 535 | default: |
| 536 | return llvm::Optional<ConversionSpecifier>(); |
| 537 | case DArg: |
| 538 | NewKind = dArg; |
| 539 | break; |
| 540 | case UArg: |
| 541 | NewKind = uArg; |
| 542 | break; |
| 543 | case OArg: |
| 544 | NewKind = oArg; |
| 545 | break; |
| 546 | } |
| 547 | |
| 548 | ConversionSpecifier FixedCS(*this); |
| 549 | FixedCS.setKind(NewKind); |
| 550 | return FixedCS; |
| 551 | } |
| 552 | |
Hans Wennborg | b8ec3e3 | 2011-12-09 11:11:07 +0000 | [diff] [blame] | 553 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 554 | // Methods on OptionalAmount. |
| 555 | //===----------------------------------------------------------------------===// |
| 556 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 557 | void OptionalAmount::toString(raw_ostream &os) const { |
Ted Kremenek | 826a345 | 2010-07-16 02:11:22 +0000 | [diff] [blame] | 558 | switch (hs) { |
| 559 | case Invalid: |
| 560 | case NotSpecified: |
| 561 | return; |
| 562 | case Arg: |
| 563 | if (UsesDotPrefix) |
| 564 | os << "."; |
| 565 | if (usesPositionalArg()) |
| 566 | os << "*" << getPositionalArgIndex() << "$"; |
| 567 | else |
| 568 | os << "*"; |
| 569 | break; |
| 570 | case Constant: |
| 571 | if (UsesDotPrefix) |
| 572 | os << "."; |
| 573 | os << amt; |
| 574 | break; |
| 575 | } |
| 576 | } |
| 577 | |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 578 | bool FormatSpecifier::hasValidLengthModifier(const TargetInfo &Target) const { |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 579 | switch (LM.getKind()) { |
| 580 | case LengthModifier::None: |
| 581 | return true; |
| 582 | |
Hans Wennborg | 32addd5 | 2012-02-16 16:34:54 +0000 | [diff] [blame] | 583 | // Handle most integer flags |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 584 | case LengthModifier::AsChar: |
| 585 | case LengthModifier::AsShort: |
| 586 | case LengthModifier::AsLongLong: |
Hans Wennborg | 32addd5 | 2012-02-16 16:34:54 +0000 | [diff] [blame] | 587 | case LengthModifier::AsQuad: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 588 | case LengthModifier::AsIntMax: |
| 589 | case LengthModifier::AsSizeT: |
| 590 | case LengthModifier::AsPtrDiff: |
| 591 | switch (CS.getKind()) { |
| 592 | case ConversionSpecifier::dArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 593 | case ConversionSpecifier::DArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 594 | case ConversionSpecifier::iArg: |
| 595 | case ConversionSpecifier::oArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 596 | case ConversionSpecifier::OArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 597 | case ConversionSpecifier::uArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 598 | case ConversionSpecifier::UArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 599 | case ConversionSpecifier::xArg: |
| 600 | case ConversionSpecifier::XArg: |
| 601 | case ConversionSpecifier::nArg: |
| 602 | return true; |
| 603 | default: |
| 604 | return false; |
| 605 | } |
| 606 | |
Hans Wennborg | 32addd5 | 2012-02-16 16:34:54 +0000 | [diff] [blame] | 607 | // Handle 'l' flag |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 608 | case LengthModifier::AsLong: |
| 609 | switch (CS.getKind()) { |
| 610 | case ConversionSpecifier::dArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 611 | case ConversionSpecifier::DArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 612 | case ConversionSpecifier::iArg: |
| 613 | case ConversionSpecifier::oArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 614 | case ConversionSpecifier::OArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 615 | case ConversionSpecifier::uArg: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 616 | case ConversionSpecifier::UArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 617 | case ConversionSpecifier::xArg: |
| 618 | case ConversionSpecifier::XArg: |
| 619 | case ConversionSpecifier::aArg: |
| 620 | case ConversionSpecifier::AArg: |
| 621 | case ConversionSpecifier::fArg: |
| 622 | case ConversionSpecifier::FArg: |
| 623 | case ConversionSpecifier::eArg: |
| 624 | case ConversionSpecifier::EArg: |
| 625 | case ConversionSpecifier::gArg: |
| 626 | case ConversionSpecifier::GArg: |
| 627 | case ConversionSpecifier::nArg: |
| 628 | case ConversionSpecifier::cArg: |
| 629 | case ConversionSpecifier::sArg: |
Ted Kremenek | ef1440b | 2012-01-20 22:11:52 +0000 | [diff] [blame] | 630 | case ConversionSpecifier::ScanListArg: |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 631 | return true; |
| 632 | default: |
| 633 | return false; |
| 634 | } |
| 635 | |
| 636 | case LengthModifier::AsLongDouble: |
| 637 | switch (CS.getKind()) { |
| 638 | case ConversionSpecifier::aArg: |
| 639 | case ConversionSpecifier::AArg: |
| 640 | case ConversionSpecifier::fArg: |
| 641 | case ConversionSpecifier::FArg: |
| 642 | case ConversionSpecifier::eArg: |
| 643 | case ConversionSpecifier::EArg: |
| 644 | case ConversionSpecifier::gArg: |
| 645 | case ConversionSpecifier::GArg: |
| 646 | return true; |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 647 | // GNU libc extension. |
Ted Kremenek | 9d24c2c | 2012-01-24 21:29:54 +0000 | [diff] [blame] | 648 | case ConversionSpecifier::dArg: |
| 649 | case ConversionSpecifier::iArg: |
| 650 | case ConversionSpecifier::oArg: |
| 651 | case ConversionSpecifier::uArg: |
| 652 | case ConversionSpecifier::xArg: |
| 653 | case ConversionSpecifier::XArg: |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 654 | return !Target.getTriple().isOSDarwin() && |
| 655 | !Target.getTriple().isOSWindows(); |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 656 | default: |
| 657 | return false; |
| 658 | } |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 659 | |
| 660 | case LengthModifier::AsAllocate: |
| 661 | switch (CS.getKind()) { |
| 662 | case ConversionSpecifier::sArg: |
| 663 | case ConversionSpecifier::SArg: |
Hans Wennborg | 28058d1 | 2012-01-12 15:07:16 +0000 | [diff] [blame] | 664 | case ConversionSpecifier::ScanListArg: |
Hans Wennborg | d02deeb | 2011-12-15 10:25:47 +0000 | [diff] [blame] | 665 | return true; |
| 666 | default: |
| 667 | return false; |
| 668 | } |
Hans Wennborg | 37969b7 | 2012-01-12 17:11:12 +0000 | [diff] [blame] | 669 | |
| 670 | case LengthModifier::AsMAllocate: |
| 671 | switch (CS.getKind()) { |
| 672 | case ConversionSpecifier::cArg: |
| 673 | case ConversionSpecifier::CArg: |
| 674 | case ConversionSpecifier::sArg: |
| 675 | case ConversionSpecifier::SArg: |
| 676 | case ConversionSpecifier::ScanListArg: |
| 677 | return true; |
| 678 | default: |
| 679 | return false; |
| 680 | } |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 681 | } |
David Blaikie | 3026348 | 2012-01-20 21:50:17 +0000 | [diff] [blame] | 682 | llvm_unreachable("Invalid LengthModifier Kind!"); |
Ted Kremenek | a412a49 | 2010-07-20 20:04:42 +0000 | [diff] [blame] | 683 | } |
Hans Wennborg | 7651742 | 2012-02-22 10:17:01 +0000 | [diff] [blame] | 684 | |
| 685 | bool FormatSpecifier::hasStandardLengthModifier() const { |
| 686 | switch (LM.getKind()) { |
| 687 | case LengthModifier::None: |
| 688 | case LengthModifier::AsChar: |
| 689 | case LengthModifier::AsShort: |
| 690 | case LengthModifier::AsLong: |
| 691 | case LengthModifier::AsLongLong: |
| 692 | case LengthModifier::AsIntMax: |
| 693 | case LengthModifier::AsSizeT: |
| 694 | case LengthModifier::AsPtrDiff: |
| 695 | case LengthModifier::AsLongDouble: |
| 696 | return true; |
| 697 | case LengthModifier::AsAllocate: |
| 698 | case LengthModifier::AsMAllocate: |
| 699 | case LengthModifier::AsQuad: |
| 700 | return false; |
| 701 | } |
| 702 | llvm_unreachable("Invalid LengthModifier Kind!"); |
| 703 | } |
| 704 | |
| 705 | bool FormatSpecifier::hasStandardConversionSpecifier(const LangOptions &LangOpt) const { |
| 706 | switch (CS.getKind()) { |
| 707 | case ConversionSpecifier::cArg: |
| 708 | case ConversionSpecifier::dArg: |
| 709 | case ConversionSpecifier::iArg: |
| 710 | case ConversionSpecifier::oArg: |
| 711 | case ConversionSpecifier::uArg: |
| 712 | case ConversionSpecifier::xArg: |
| 713 | case ConversionSpecifier::XArg: |
| 714 | case ConversionSpecifier::fArg: |
| 715 | case ConversionSpecifier::FArg: |
| 716 | case ConversionSpecifier::eArg: |
| 717 | case ConversionSpecifier::EArg: |
| 718 | case ConversionSpecifier::gArg: |
| 719 | case ConversionSpecifier::GArg: |
| 720 | case ConversionSpecifier::aArg: |
| 721 | case ConversionSpecifier::AArg: |
| 722 | case ConversionSpecifier::sArg: |
| 723 | case ConversionSpecifier::pArg: |
| 724 | case ConversionSpecifier::nArg: |
| 725 | case ConversionSpecifier::ObjCObjArg: |
| 726 | case ConversionSpecifier::ScanListArg: |
| 727 | case ConversionSpecifier::PercentArg: |
| 728 | return true; |
| 729 | case ConversionSpecifier::CArg: |
| 730 | case ConversionSpecifier::SArg: |
| 731 | return LangOpt.ObjC1 || LangOpt.ObjC2; |
| 732 | case ConversionSpecifier::InvalidSpecifier: |
| 733 | case ConversionSpecifier::PrintErrno: |
Jordan Rose | 275b6f5 | 2012-09-13 02:11:03 +0000 | [diff] [blame] | 734 | case ConversionSpecifier::DArg: |
| 735 | case ConversionSpecifier::OArg: |
| 736 | case ConversionSpecifier::UArg: |
Hans Wennborg | 7651742 | 2012-02-22 10:17:01 +0000 | [diff] [blame] | 737 | return false; |
| 738 | } |
| 739 | llvm_unreachable("Invalid ConversionSpecifier Kind!"); |
| 740 | } |
| 741 | |
| 742 | bool FormatSpecifier::hasStandardLengthConversionCombination() const { |
| 743 | if (LM.getKind() == LengthModifier::AsLongDouble) { |
| 744 | switch(CS.getKind()) { |
| 745 | case ConversionSpecifier::dArg: |
| 746 | case ConversionSpecifier::iArg: |
| 747 | case ConversionSpecifier::oArg: |
| 748 | case ConversionSpecifier::uArg: |
| 749 | case ConversionSpecifier::xArg: |
| 750 | case ConversionSpecifier::XArg: |
| 751 | return false; |
| 752 | default: |
| 753 | return true; |
| 754 | } |
| 755 | } |
| 756 | return true; |
| 757 | } |
Hans Wennborg | 4684778 | 2012-07-27 19:17:46 +0000 | [diff] [blame] | 758 | |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 759 | llvm::Optional<LengthModifier> |
| 760 | FormatSpecifier::getCorrectedLengthModifier() const { |
Jordan Rose | 8be066e | 2012-09-08 04:00:12 +0000 | [diff] [blame] | 761 | if (CS.isAnyIntArg() || CS.getKind() == ConversionSpecifier::nArg) { |
| 762 | if (LM.getKind() == LengthModifier::AsLongDouble || |
| 763 | LM.getKind() == LengthModifier::AsQuad) { |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 764 | LengthModifier FixedLM(LM); |
| 765 | FixedLM.setKind(LengthModifier::AsLongLong); |
| 766 | return FixedLM; |
| 767 | } |
Jordan Rose | bbb6bb4 | 2012-09-08 04:00:03 +0000 | [diff] [blame] | 768 | } |
| 769 | |
| 770 | return llvm::Optional<LengthModifier>(); |
| 771 | } |
| 772 | |
Hans Wennborg | 4684778 | 2012-07-27 19:17:46 +0000 | [diff] [blame] | 773 | bool FormatSpecifier::namedTypeToLengthModifier(QualType QT, |
| 774 | LengthModifier &LM) { |
| 775 | assert(isa<TypedefType>(QT) && "Expected a TypedefType"); |
| 776 | const TypedefNameDecl *Typedef = cast<TypedefType>(QT)->getDecl(); |
| 777 | |
| 778 | for (;;) { |
| 779 | const IdentifierInfo *Identifier = Typedef->getIdentifier(); |
| 780 | if (Identifier->getName() == "size_t") { |
| 781 | LM.setKind(LengthModifier::AsSizeT); |
| 782 | return true; |
| 783 | } else if (Identifier->getName() == "ssize_t") { |
| 784 | // Not C99, but common in Unix. |
| 785 | LM.setKind(LengthModifier::AsSizeT); |
| 786 | return true; |
| 787 | } else if (Identifier->getName() == "intmax_t") { |
| 788 | LM.setKind(LengthModifier::AsIntMax); |
| 789 | return true; |
| 790 | } else if (Identifier->getName() == "uintmax_t") { |
| 791 | LM.setKind(LengthModifier::AsIntMax); |
| 792 | return true; |
| 793 | } else if (Identifier->getName() == "ptrdiff_t") { |
| 794 | LM.setKind(LengthModifier::AsPtrDiff); |
| 795 | return true; |
| 796 | } |
| 797 | |
| 798 | QualType T = Typedef->getUnderlyingType(); |
| 799 | if (!isa<TypedefType>(T)) |
| 800 | break; |
| 801 | |
| 802 | Typedef = cast<TypedefType>(T)->getDecl(); |
| 803 | } |
| 804 | return false; |
| 805 | } |