-//===-- 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 <string>
-#include <stdio.h>
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/DataTypes.h"
+#include <iterator>
-static inline std::string utohexstr(uint64_t X) {
- char Buffer[40];
- char *BufPtr = Buffer+39;
+namespace llvm {
+template<typename T> class SmallVectorImpl;
- *BufPtr = 0; // Null terminate buffer...
- if (X == 0) *--BufPtr = '0'; // Handle special case...
+/// 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<typename IntTy>
+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 Mod = X & 15;
- if (Mod < 10)
- *--BufPtr = '0' + Mod;
- else
- *--BufPtr = 'A' + Mod-10;
+ unsigned char Mod = static_cast<unsigned char>(X) & 15;
+ *--BufPtr = hexdigit(Mod, LowerCase);
X >>= 4;
}
- return std::string(BufPtr);
+ return BufPtr;
}
-static inline std::string utostr(uint64_t X, bool isNeg = false) {
- char Buffer[40];
- char *BufPtr = Buffer+39;
+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<uint64_t>(-X), true);
else
- return utostr((unsigned)X);
+ return utostr(static_cast<uint64_t>(X));
+}
+
+/// 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<StringRef, StringRef> 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<StringRef> &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";
+ }
+ }
}
-static inline std::string ftostr(double V) {
- char Buffer[200];
- snprintf(Buffer, 200, "%e", V);
- return Buffer;
+template <typename IteratorT>
+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 <typename IteratorT>
+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 <typename IteratorT>
+inline std::string join(IteratorT Begin, IteratorT End, StringRef Separator) {
+ typedef typename std::iterator_traits<IteratorT>::iterator_category tag;
+ return join_impl(Begin, End, Separator, tag());
+}
+
+} // End llvm namespace
+
#endif
projects / oota-llvm.git / blobdiff