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113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
//===-- Support/StringExtras.h - Useful string functions --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains some functions that are useful when dealing with strings.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SUPPORT_STRINGEXTRAS_H
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#define SUPPORT_STRINGEXTRAS_H
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#include "Support/DataTypes.h"
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#include <string>
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#include <stdio.h>
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namespace llvm {
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static inline std::string utohexstr(uint64_t X) {
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char Buffer[40];
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char *BufPtr = Buffer+39;
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*BufPtr = 0; // Null terminate buffer...
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if (X == 0) *--BufPtr = '0'; // Handle special case...
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while (X) {
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unsigned Mod = X & 15;
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if (Mod < 10)
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*--BufPtr = '0' + Mod;
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else
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*--BufPtr = 'A' + Mod-10;
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X >>= 4;
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}
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return std::string(BufPtr);
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}
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static inline std::string utostr(unsigned long long X, bool isNeg = false) {
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char Buffer[40];
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char *BufPtr = Buffer+39;
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*BufPtr = 0; // Null terminate buffer...
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if (X == 0) *--BufPtr = '0'; // Handle special case...
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while (X) {
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*--BufPtr = '0' + (X % 10);
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X /= 10;
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}
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if (isNeg) *--BufPtr = '-'; // Add negative sign...
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return std::string(BufPtr);
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}
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static inline std::string itostr(int64_t X) {
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if (X < 0)
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return utostr(static_cast<uint64_t>(-X), true);
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else
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return utostr(static_cast<uint64_t>(X));
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}
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static inline std::string utostr(unsigned long X, bool isNeg = false) {
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return utostr(static_cast<unsigned long long>(X), isNeg);
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}
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static inline std::string utostr(unsigned X, bool isNeg = false) {
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char Buffer[20];
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char *BufPtr = Buffer+19;
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*BufPtr = 0; // Null terminate buffer...
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if (X == 0) *--BufPtr = '0'; // Handle special case...
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while (X) {
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*--BufPtr = '0' + (X % 10);
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X /= 10;
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}
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if (isNeg) *--BufPtr = '-'; // Add negative sign...
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return std::string(BufPtr);
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}
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static inline std::string itostr(int X) {
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if (X < 0)
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return utostr(static_cast<unsigned>(-X), true);
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else
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return utostr(static_cast<unsigned>(X));
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}
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static inline std::string ftostr(double V) {
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char Buffer[200];
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snprintf(Buffer, 200, "%20.6e", V);
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return Buffer;
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}
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/// getToken - This function extracts one token from source, ignoring any
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/// leading characters that appear in the Delimiters string, and ending the
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/// token at any of the characters that appear in the Delimiters string. If
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/// there are no tokens in the source string, an empty string is returned.
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/// The Source source string is updated in place to remove the returned string
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/// and any delimiter prefix from it.
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std::string getToken(std::string &Source,
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const char *Delimiters = " \t\n\v\f\r");
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} // End llvm namespace
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#endif
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