1 //===-- llvm/ADT/StringExtras.h - Useful string functions -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains some functions that are useful when dealing with strings.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_ADT_STRINGEXTRAS_H
15 #define LLVM_ADT_STRINGEXTRAS_H
17 #include "llvm/Support/DataTypes.h"
24 static inline std::string utohexstr(uint64_t X) {
26 char *BufPtr = Buffer+39;
28 *BufPtr = 0; // Null terminate buffer...
29 if (X == 0) *--BufPtr = '0'; // Handle special case...
32 unsigned char Mod = static_cast<unsigned char>(X) & 15;
34 *--BufPtr = '0' + Mod;
36 *--BufPtr = 'A' + Mod-10;
39 return std::string(BufPtr);
42 static inline std::string utostr_32(uint32_t X, bool isNeg = false) {
44 char *BufPtr = Buffer+19;
46 *BufPtr = 0; // Null terminate buffer...
47 if (X == 0) *--BufPtr = '0'; // Handle special case...
50 *--BufPtr = '0' + char(X % 10);
54 if (isNeg) *--BufPtr = '-'; // Add negative sign...
56 return std::string(BufPtr);
59 static inline std::string utostr(uint64_t X, bool isNeg = false) {
61 return utostr_32(uint32_t(X), isNeg);
64 char *BufPtr = Buffer+39;
66 *BufPtr = 0; // Null terminate buffer...
67 if (X == 0) *--BufPtr = '0'; // Handle special case...
70 *--BufPtr = '0' + char(X % 10);
74 if (isNeg) *--BufPtr = '-'; // Add negative sign...
75 return std::string(BufPtr);
79 static inline std::string itostr(int64_t X) {
81 return utostr(static_cast<uint64_t>(-X), true);
83 return utostr(static_cast<uint64_t>(X));
86 static inline std::string ftostr(double V) {
88 sprintf(Buffer, "%20.6e", V);
90 while (*B == ' ') ++B;
94 static inline std::string LowercaseString(const std::string &S) {
95 std::string result(S);
96 for (unsigned i = 0; i < S.length(); ++i)
97 if (isupper(result[i]))
98 result[i] = char(tolower(result[i]));
102 /// StringsEqualNoCase - Return true if the two strings are equal, ignoring
104 static inline bool StringsEqualNoCase(const std::string &LHS,
105 const std::string &RHS) {
106 if (LHS.size() != RHS.size()) return false;
107 for (unsigned i = 0, e = LHS.size(); i != e; ++i)
108 if (tolower(LHS[i]) != tolower(RHS[i])) return false;
112 /// StringsEqualNoCase - Return true if the two strings are equal, ignoring
114 static inline bool StringsEqualNoCase(const std::string &LHS,
116 for (unsigned i = 0, e = LHS.size(); i != e; ++i) {
117 if (RHS[i] == 0) return false; // RHS too short.
118 if (tolower(LHS[i]) != tolower(RHS[i])) return false;
120 return RHS[LHS.size()] == 0; // Not too long?
123 /// getToken - This function extracts one token from source, ignoring any
124 /// leading characters that appear in the Delimiters string, and ending the
125 /// token at any of the characters that appear in the Delimiters string. If
126 /// there are no tokens in the source string, an empty string is returned.
127 /// The Source source string is updated in place to remove the returned string
128 /// and any delimiter prefix from it.
129 std::string getToken(std::string &Source,
130 const char *Delimiters = " \t\n\v\f\r");
132 } // End llvm namespace