| //===-- Support/StringExtras.h - Useful string functions --------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and 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_STRINGEXTRAS_H |
| #define SUPPORT_STRINGEXTRAS_H |
| |
| #include "Support/DataTypes.h" |
| #include <string> |
| #include <stdio.h> |
| |
| namespace llvm { |
| |
| static inline std::string utohexstr(uint64_t X) { |
| char Buffer[40]; |
| char *BufPtr = Buffer+39; |
| |
| *BufPtr = 0; // Null terminate buffer... |
| if (X == 0) *--BufPtr = '0'; // Handle special case... |
| |
| while (X) { |
| unsigned Mod = X & 15; |
| if (Mod < 10) |
| *--BufPtr = '0' + Mod; |
| else |
| *--BufPtr = 'A' + Mod-10; |
| X >>= 4; |
| } |
| return std::string(BufPtr); |
| } |
| |
| static inline std::string utostr(unsigned long long X, bool isNeg = false) { |
| char Buffer[40]; |
| char *BufPtr = Buffer+39; |
| |
| *BufPtr = 0; // Null terminate buffer... |
| if (X == 0) *--BufPtr = '0'; // Handle special case... |
| |
| while (X) { |
| *--BufPtr = '0' + (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(static_cast<uint64_t>(-X), true); |
| else |
| return utostr(static_cast<uint64_t>(X)); |
| } |
| |
| |
| static inline std::string utostr(unsigned long X, bool isNeg = false) { |
| return utostr(static_cast<unsigned long long>(X), isNeg); |
| } |
| |
| 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); |
| X /= 10; |
| } |
| |
| if (isNeg) *--BufPtr = '-'; // Add negative sign... |
| |
| return std::string(BufPtr); |
| } |
| |
| static inline std::string itostr(int X) { |
| if (X < 0) |
| return utostr(static_cast<unsigned>(-X), true); |
| else |
| return utostr(static_cast<unsigned>(X)); |
| } |
| |
| static inline std::string ftostr(double V) { |
| char Buffer[200]; |
| snprintf(Buffer, 200, "%20.6e", V); |
| return Buffer; |
| } |
| |
| |
| /// 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 Source source string is updated in place to remove the returned string |
| /// and any delimiter prefix from it. |
| std::string getToken(std::string &Source, |
| const char *Delimiters = " \t\n\v\f\r"); |
| |
| } // End llvm namespace |
| |
| #endif |