X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FADT%2FStringExtras.h;h=0992f5d4a54965dd22b17c8aac3ae2ce85001677;hb=63b14baf799b4c3ba8182596073ad5b3f37cd1cc;hp=46e2c5aaf0b6dd71768d2a0c6a02a61ff4710a53;hpb=697954c15da58bd8b186dbafdedd8b06db770201;p=oota-llvm.git diff --git a/include/llvm/ADT/StringExtras.h b/include/llvm/ADT/StringExtras.h index 46e2c5aaf0b..0992f5d4a54 100644 --- a/include/llvm/ADT/StringExtras.h +++ b/include/llvm/ADT/StringExtras.h @@ -1,69 +1,212 @@ -//===-- Support/StringExtras.h - Useful string functions ---------*- C++ -*--=// +//===-- llvm/ADT/StringExtras.h - Useful string functions -------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// // // This file contains some functions that are useful when dealing with strings. // //===----------------------------------------------------------------------===// -#ifndef SUPPORT_STRING_EXTRAS_H -#define SUPPORT_STRING_EXTRAS_H +#ifndef LLVM_ADT_STRINGEXTRAS_H +#define LLVM_ADT_STRINGEXTRAS_H -#include "Support/DataTypes.h" -#include -#include +#include "llvm/ADT/StringRef.h" +#include "llvm/Support/DataTypes.h" +#include -static inline std::string utostr(uint64_t X, bool isNeg = false) { - char Buffer[40]; - char *BufPtr = Buffer+39; +namespace llvm { +template class SmallVectorImpl; + +/// hexdigit - Return the hexadecimal character for the +/// given number \p X (which should be less than 16). +static inline char hexdigit(unsigned X, bool LowerCase = false) { + const char HexChar = LowerCase ? 'a' : 'A'; + return X < 10 ? '0' + X : HexChar + X - 10; +} + +/// Construct a string ref from a boolean. +static inline StringRef toStringRef(bool B) { + return StringRef(B ? "true" : "false"); +} + +/// Interpret the given character \p C as a hexadecimal digit and return its +/// value. +/// +/// If \p C is not a valid hex digit, -1U is returned. +static inline unsigned hexDigitValue(char C) { + if (C >= '0' && C <= '9') return C-'0'; + if (C >= 'a' && C <= 'f') return C-'a'+10U; + if (C >= 'A' && C <= 'F') return C-'A'+10U; + return -1U; +} + +/// utohex_buffer - Emit the specified number into the buffer specified by +/// BufferEnd, returning a pointer to the start of the string. This can be used +/// like this: (note that the buffer must be large enough to handle any number): +/// char Buffer[40]; +/// printf("0x%s", utohex_buffer(X, Buffer+40)); +/// +/// This should only be used with unsigned types. +/// +template +static inline char *utohex_buffer(IntTy X, char *BufferEnd, bool LowerCase = false) { + char *BufPtr = BufferEnd; + *--BufPtr = 0; // Null terminate buffer. + if (X == 0) { + *--BufPtr = '0'; // Handle special case. + return BufPtr; + } + + while (X) { + unsigned char Mod = static_cast(X) & 15; + *--BufPtr = hexdigit(Mod, LowerCase); + X >>= 4; + } + return BufPtr; +} + +static inline std::string utohexstr(uint64_t X, bool LowerCase = false) { + char Buffer[17]; + return utohex_buffer(X, Buffer+17, LowerCase); +} + +static inline std::string utostr_32(uint32_t X, bool isNeg = false) { + char Buffer[11]; + char *BufPtr = Buffer+11; - *BufPtr = 0; // Null terminate buffer... if (X == 0) *--BufPtr = '0'; // Handle special case... while (X) { - *--BufPtr = '0' + (X % 10); + *--BufPtr = '0' + char(X % 10); X /= 10; } if (isNeg) *--BufPtr = '-'; // Add negative sign... - return std::string(BufPtr); -} - -static inline std::string itostr(int64_t X) { - if (X < 0) - return utostr((uint64_t)-X, true); - else - return utostr((uint64_t)X); + return std::string(BufPtr, Buffer+11); } +static inline std::string utostr(uint64_t X, bool isNeg = false) { + char Buffer[21]; + char *BufPtr = Buffer+21; -static inline std::string utostr(unsigned X, bool isNeg = false) { - char Buffer[20]; - char *BufPtr = Buffer+19; - - *BufPtr = 0; // Null terminate buffer... if (X == 0) *--BufPtr = '0'; // Handle special case... while (X) { - *--BufPtr = '0' + (X % 10); + *--BufPtr = '0' + char(X % 10); X /= 10; } if (isNeg) *--BufPtr = '-'; // Add negative sign... - - return std::string(BufPtr); + return std::string(BufPtr, Buffer+21); } -static inline std::string itostr(int X) { - if (X < 0) - return utostr((unsigned)-X, true); + +static inline std::string itostr(int64_t X) { + if (X < 0) + return utostr(static_cast(-X), true); else - return utostr((unsigned)X); + return utostr(static_cast(X)); } -static inline std::string ftostr(double V) { - char Buffer[200]; - snprintf(Buffer, 200, "%e", V); - return Buffer; +/// StrInStrNoCase - Portable version of strcasestr. Locates the first +/// occurrence of string 's1' in string 's2', ignoring case. Returns +/// the offset of s2 in s1 or npos if s2 cannot be found. +StringRef::size_type StrInStrNoCase(StringRef s1, StringRef s2); + +/// getToken - This function extracts one token from source, ignoring any +/// leading characters that appear in the Delimiters string, and ending the +/// token at any of the characters that appear in the Delimiters string. If +/// there are no tokens in the source string, an empty string is returned. +/// The function returns a pair containing the extracted token and the +/// remaining tail string. +std::pair getToken(StringRef Source, + StringRef Delimiters = " \t\n\v\f\r"); + +/// SplitString - Split up the specified string according to the specified +/// delimiters, appending the result fragments to the output list. +void SplitString(StringRef Source, + SmallVectorImpl &OutFragments, + StringRef Delimiters = " \t\n\v\f\r"); + +/// HashString - Hash function for strings. +/// +/// This is the Bernstein hash function. +// +// FIXME: Investigate whether a modified bernstein hash function performs +// better: http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx +// X*33+c -> X*33^c +static inline unsigned HashString(StringRef Str, unsigned Result = 0) { + for (StringRef::size_type i = 0, e = Str.size(); i != e; ++i) + Result = Result * 33 + (unsigned char)Str[i]; + return Result; } +/// Returns the English suffix for an ordinal integer (-st, -nd, -rd, -th). +static inline StringRef getOrdinalSuffix(unsigned Val) { + // It is critically important that we do this perfectly for + // user-written sequences with over 100 elements. + switch (Val % 100) { + case 11: + case 12: + case 13: + return "th"; + default: + switch (Val % 10) { + case 1: return "st"; + case 2: return "nd"; + case 3: return "rd"; + default: return "th"; + } + } +} + +template +inline std::string join_impl(IteratorT Begin, IteratorT End, + StringRef Separator, std::input_iterator_tag) { + std::string S; + if (Begin == End) + return S; + + S += (*Begin); + while (++Begin != End) { + S += Separator; + S += (*Begin); + } + return S; +} + +template +inline std::string join_impl(IteratorT Begin, IteratorT End, + StringRef Separator, std::forward_iterator_tag) { + std::string S; + if (Begin == End) + return S; + + size_t Len = (std::distance(Begin, End) - 1) * Separator.size(); + for (IteratorT I = Begin; I != End; ++I) + Len += (*Begin).size(); + S.reserve(Len); + S += (*Begin); + while (++Begin != End) { + S += Separator; + S += (*Begin); + } + return S; +} + +/// Joins the strings in the range [Begin, End), adding Separator between +/// the elements. +template +inline std::string join(IteratorT Begin, IteratorT End, StringRef Separator) { + typedef typename std::iterator_traits::iterator_category tag; + return join_impl(Begin, End, Separator, tag()); +} + +} // End llvm namespace + #endif