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//===-- 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 LLVM_ADT_STRINGEXTRAS_H
#define LLVM_ADT_STRINGEXTRAS_H
#include "llvm/Support/DataTypes.h"
#include "llvm/ADT/APFloat.h"
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
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 char Mod = static_cast<unsigned char>(X) & 15;
if (Mod < 10)
*--BufPtr = '0' + Mod;
else
*--BufPtr = 'A' + Mod-10;
X >>= 4;
}
return std::string(BufPtr);
}
static inline std::string utostr_32(uint32_t 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' + char(X % 10);
X /= 10;
}
if (isNeg) *--BufPtr = '-'; // Add negative sign...
return std::string(BufPtr);
}
static inline std::string utostr(uint64_t X, bool isNeg = false) {
if (X == uint32_t(X))
return utostr_32(uint32_t(X), isNeg);
char Buffer[40];
char *BufPtr = Buffer+39;
*BufPtr = 0; // Null terminate buffer...
if (X == 0) *--BufPtr = '0'; // Handle special case...
while (X) {
*--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(static_cast<uint64_t>(-X), true);
else
return utostr(static_cast<uint64_t>(X));
}
static inline std::string itohexstr(int64_t X) {
return utohexstr(static_cast<uint64_t>(X));
}
static inline std::string ftostr(double V) {
char Buffer[200];
sprintf(Buffer, "%20.6e", V);
char *B = Buffer;
while (*B == ' ') ++B;
return B;
}
static inline std::string ftostr(const APFloat& V) {
if (&V.getSemantics() == &APFloat::IEEEdouble)
return ftostr(V.convertToDouble());
else if (&V.getSemantics() == &APFloat::IEEEsingle)
return ftostr((double)V.convertToFloat());
return "<unknown format in ftostr>"; // error
}
static inline std::string LowercaseString(const std::string &S) {
std::string result(S);
for (unsigned i = 0; i < S.length(); ++i)
if (isupper(result[i]))
result[i] = char(tolower(result[i]));
return result;
}
static inline std::string UppercaseString(const std::string &S) {
std::string result(S);
for (unsigned i = 0; i < S.length(); ++i)
if (islower(result[i]))
result[i] = char(toupper(result[i]));
return result;
}
/// StringsEqualNoCase - Return true if the two strings are equal, ignoring
/// case.
static inline bool StringsEqualNoCase(const std::string &LHS,
const std::string &RHS) {
if (LHS.size() != RHS.size()) return false;
for (unsigned i = 0, e = static_cast<unsigned>(LHS.size()); i != e; ++i)
if (tolower(LHS[i]) != tolower(RHS[i])) return false;
return true;
}
/// StringsEqualNoCase - Return true if the two strings are equal, ignoring
/// case.
static inline bool StringsEqualNoCase(const std::string &LHS,
const char *RHS) {
for (unsigned i = 0, e = static_cast<unsigned>(LHS.size()); i != e; ++i) {
if (RHS[i] == 0) return false; // RHS too short.
if (tolower(LHS[i]) != tolower(RHS[i])) return false;
}
return RHS[LHS.size()] == 0; // Not too long?
}
/// CStrInCStrNoCase - Portable version of strcasestr. Locates the first
/// occurance of c-string 's2' in string 's1', ignoring case. Returns
/// NULL if 's2' cannot be found.
static inline const char* CStrInCStrNoCase(const char *s1, const char *s2) {
// Are either strings NULL or empty?
if (!s1 || !s2 || s1[0] == '\0' || s2[0] == '\0')
return 0;
if (s1 == s2)
return s1;
const char *I1=s1, *I2=s2;
while (*I1 != '\0' || *I2 != '\0' )
if (tolower(*I1) != tolower(*I2)) { // No match. Start over.
++s1; I1 = s1; I2 = s2;
}
else { // Character match. Advance to the next character.
++I1; ++I2;
}
// If we exhausted all of the characters in 's2', then 's2' appears in 's1'.
return *I2 == '\0' ? s1 : 0;
}
/// 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");
/// SplitString - Split up the specified string according to the specified
/// delimiters, appending the result fragments to the output list.
void SplitString(const std::string &Source,
std::vector<std::string> &OutFragments,
const char *Delimiters = " \t\n\v\f\r");
/// UnescapeString - Modify the argument string, turning two character sequences
/// like '\\' 'n' into '\n'. This handles: \e \a \b \f \n \r \t \v \' \\ and
/// \num (where num is a 1-3 byte octal value).
void UnescapeString(std::string &Str);
/// EscapeString - Modify the argument string, turning '\\' and anything that
/// doesn't satisfy std::isprint into an escape sequence.
void EscapeString(std::string &Str);
} // End llvm namespace
#endif
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