Current File : //data/old/usr/local/include/znc/ZNCString.h
/*
* Copyright (C) 2004-2018 ZNC, see the NOTICE file for details.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ZNCSTRING_H
#define ZNCSTRING_H
#include <znc/zncconfig.h>
#include <map>
#include <set>
#include <string>
#include <vector>
#include <sstream>
#include <sys/types.h>
#include <initializer_list>
#define _SQL(s) CString("'" + CString(s).Escape_n(CString::ESQL) + "'")
#define _URL(s) CString(s).Escape_n(CString::EURL)
#define _HTML(s) CString(s).Escape_n(CString::EHTML)
#define _NAMEDFMT(s) CString(s).Escape_n(CString::ENAMEDFMT)
class CString;
class MCString;
typedef std::set<CString> SCString;
typedef std::vector<CString> VCString;
typedef std::vector<std::pair<CString, CString>> VPair;
static const unsigned char XX = 0xff;
static const unsigned char base64_table[256] = {
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, 62, XX, XX, XX, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60,
61, XX, XX, XX, XX, XX, XX, XX, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, XX, XX, XX, XX,
XX, XX, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50, 51, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX,
};
enum class CaseSensitivity { CaseInsensitive, CaseSensitive };
/**
* @brief String class that is used inside ZNC.
*
* All strings that are used in ZNC and its modules should use instances of this
* class. It provides helpful functions for parsing input like Token() and
* Split().
*/
class CString : public std::string {
public:
typedef enum {
EASCII,
EURL,
EHTML,
ESQL,
ENAMEDFMT,
EDEBUG,
EMSGTAG,
EHEXCOLON,
} EEscape;
static const CaseSensitivity CaseSensitive = CaseSensitivity::CaseSensitive;
static const CaseSensitivity CaseInsensitive =
CaseSensitivity::CaseInsensitive;
explicit CString(bool b) : std::string(b ? "true" : "false") {}
explicit CString(char c);
explicit CString(unsigned char c);
explicit CString(short i);
explicit CString(unsigned short i);
explicit CString(int i);
explicit CString(unsigned int i);
explicit CString(long i);
explicit CString(unsigned long i);
explicit CString(long long i);
explicit CString(unsigned long long i);
explicit CString(double i, int precision = 2);
explicit CString(float i, int precision = 2);
CString() : std::string() {}
CString(const char* c) : std::string(c) {}
CString(const char* c, size_t l) : std::string(c, l) {}
CString(const std::string& s) : std::string(s) {}
CString(size_t n, char c) : std::string(n, c) {}
CString(std::initializer_list<char> list) : std::string(list) {}
~CString() {}
/**
* Casts a CString to another type. Implemented via std::stringstream, you use this
* for any class that has an operator<<(std::ostream, YourClass).
* @param target The object to cast into. If the cast fails, its state is unspecified.
* @return True if the cast succeeds, and false if it fails.
*/
template <typename T>
bool Convert(T* target) const {
std::stringstream ss(*this);
ss >> *target;
return (bool)ss; // we don't care why it failed, only whether it failed
}
/**
* Joins a collection of objects together, using 'this' as a delimiter.
* You can pass either pointers to arrays, or iterators to collections.
* @param i_begin An iterator pointing to the beginning of a group of objects.
* @param i_end An iterator pointing past the end of a group of objects.
* @return The joined string
*/
template <typename Iterator>
CString Join(Iterator i_start, const Iterator& i_end) const {
if (i_start == i_end) return CString("");
std::ostringstream output;
output << *i_start;
while (true) {
++i_start;
if (i_start == i_end) return CString(output.str());
output << *this;
output << *i_start;
}
}
/**
* Compare this string caselessly to some other string.
* @param s The string to compare to.
* @param uLen The number of characters to compare.
* @return An integer less than, equal to, or greater than zero if this
* string smaller, equal.... to the given string.
*/
int CaseCmp(const CString& s,
CString::size_type uLen = CString::npos) const;
/**
* Compare this string case sensitively to some other string.
* @param s The string to compare to.
* @param uLen The number of characters to compare.
* @return An integer less than, equal to, or greater than zero if this
* string smaller, equal.... to the given string.
*/
int StrCmp(const CString& s, CString::size_type uLen = CString::npos) const;
/**
* Check if this string is equal to some other string.
* @param s The string to compare to.
* @param cs CaseSensitive if you want the comparison to be case
* sensitive, CaseInsensitive (default) otherwise.
* @return True if the strings are equal.
*/
bool Equals(const CString& s, CaseSensitivity cs = CaseInsensitive) const;
/**
* @deprecated
*/
bool Equals(const CString& s, bool bCaseSensitive,
CString::size_type uLen = CString::npos) const;
/**
* Do a wildcard comparison between two strings.
* For example, the following returns true:
* <code>WildCmp("*!?bar@foo", "I_am!~bar@foo");</code>
* @param sWild The wildcards used for the comparison.
* @param sString The string that is used for comparing.
* @param cs CaseSensitive (default) if you want the comparison
* to be case sensitive, CaseInsensitive otherwise.
* @todo Make cs CaseInsensitive by default.
* @return true if the wildcard matches.
*/
static bool WildCmp(const CString& sWild, const CString& sString,
CaseSensitivity cs = CaseSensitive);
/**
* Do a wild compare on this string.
* @param sWild The wildcards used to for the comparison.
* @param cs CaseSensitive (default) if you want the comparison
* to be case sensitive, CaseInsensitive otherwise.
* @todo Make cs CaseInsensitive by default.
* @return The result of <code>this->WildCmp(sWild, *this);</code>.
*/
bool WildCmp(const CString& sWild,
CaseSensitivity cs = CaseSensitive) const;
/**
* Turn all characters in this string into their upper-case equivalent.
* @returns A reference to *this.
*/
CString& MakeUpper();
/**
* Turn all characters in this string into their lower-case equivalent.
* @returns A reference to *this.
*/
CString& MakeLower();
/**
* Return a copy of this string with all characters turned into
* upper-case.
* @return The new string.
*/
CString AsUpper() const;
/**
* Return a copy of this string with all characters turned into
* lower-case.
* @return The new string.
*/
CString AsLower() const;
static EEscape ToEscape(const CString& sEsc);
CString Escape_n(EEscape eFrom, EEscape eTo) const;
CString Escape_n(EEscape eTo) const;
CString& Escape(EEscape eFrom, EEscape eTo);
CString& Escape(EEscape eTo);
/** Replace all occurrences in a string.
*
* You can specify a "safe zone" via sLeft and sRight. Anything inside
* of such a zone will not be replaced. This does not do recursion, so
* e.g. with <code>Replace("(a()a)", "a", "b", "(", ")", true)</code>
* you would get "a(b)" as result. The second opening brace and the
* second closing brace would not be seen as a delimitered and thus
* wouldn't be removed. The first a is inside a "safe zone" and thus is
* left alone, too.
*
* @param sStr The string to do the replacing on. This will also contain
* the result when this function returns.
* @param sReplace The string that should be replaced.
* @param sWith The replacement to use.
* @param sLeft The string that marks the begin of the "safe zone".
* @param sRight The string that marks the end of the "safe zone".
* @param bRemoveDelims If this is true, all matches for sLeft and
* sRight are removed.
* @returns The number of replacements done.
*/
static unsigned int Replace(CString& sStr, const CString& sReplace,
const CString& sWith, const CString& sLeft = "",
const CString& sRight = "",
bool bRemoveDelims = false);
/** Replace all occurrences in the current string.
* @see CString::Replace
* @param sReplace The string to look for.
* @param sWith The replacement to use.
* @param sLeft The delimiter at the beginning of a safe zone.
* @param sRight The delimiter at the end of a safe zone.
* @param bRemoveDelims If true, all matching delimiters are removed.
* @return The result of the replacing. The current string is left
* unchanged.
*/
CString Replace_n(const CString& sReplace, const CString& sWith,
const CString& sLeft = "", const CString& sRight = "",
bool bRemoveDelims = false) const;
/** Replace all occurrences in the current string.
* @see CString::Replace
* @param sReplace The string to look for.
* @param sWith The replacement to use.
* @param sLeft The delimiter at the beginning of a safe zone.
* @param sRight The delimiter at the end of a safe zone.
* @param bRemoveDelims If true, all matching delimiters are removed.
* @returns The number of replacements done.
*/
unsigned int Replace(const CString& sReplace, const CString& sWith,
const CString& sLeft = "", const CString& sRight = "",
bool bRemoveDelims = false);
/** Ellipsize the current string.
* For example, ellipsizing "Hello, I'm Bob" to the length 9 would
* result in "Hello,...".
* @param uLen The length to ellipsize to.
* @return The ellipsized string.
*/
CString Ellipsize(unsigned int uLen) const;
/** Return the left part of the string.
* @param uCount The number of characters to keep.
* @return The resulting string.
*/
CString Left(size_type uCount) const;
/** Return the right part of the string.
* @param uCount The number of characters to keep.
* @return The resulting string.
*/
CString Right(size_type uCount) const;
/** Get the first line of this string.
* @return The first line of text.
*/
CString FirstLine() const { return Token(0, false, "\n"); }
/** Get a token out of this string. For example in the string "a bc d e",
* each of "a", "bc", "d" and "e" are tokens.
* @param uPos The number of the token you are interested. The first
* token has a position of 0.
* @param bRest If false, only the token you asked for is returned. Else
* you get the substring starting from the beginning of
* your token.
* @param sSep Seperator between tokens.
* @param bAllowEmpty If this is true, empty tokens are allowed. In the
* example from above this means that there is a
* token "" before the "e" token.
* @return The token you asked for and, if bRest is true, everything
* after it.
* @see Split() if you need a string split into all of its tokens.
*/
CString Token(size_t uPos, bool bRest = false, const CString& sSep = " ",
bool bAllowEmpty = false) const;
/** Get a token out of this string. This function behaves much like the
* other Token() function in this class. The extra arguments are
* handled similarly to Split().
*/
CString Token(size_t uPos, bool bRest, const CString& sSep,
bool bAllowEmpty, const CString& sLeft, const CString& sRight,
bool bTrimQuotes = true) const;
size_type URLSplit(MCString& msRet) const;
size_type OptionSplit(MCString& msRet, bool bUpperKeys = false) const;
size_type QuoteSplit(VCString& vsRet) const;
/** Split up this string into tokens.
* Via sLeft and sRight you can define "markers" like with Replace().
* Anything in such a marked section is treated as a single token. All
* occurrences of sDelim in such a block are ignored.
* @param sDelim Delimiter between tokens.
* @param vsRet Vector for returning the result.
* @param bAllowEmpty Do empty tokens count as a valid token?
* @param sLeft Left delimiter like with Replace().
* @param sRight Right delimiter like with Replace().
* @param bTrimQuotes Should sLeft and sRight be removed from the token
* they mark?
* @param bTrimWhiteSpace If this is true, CString::Trim() is called on
* each token.
* @return The number of tokens found.
*/
size_type Split(const CString& sDelim, VCString& vsRet,
bool bAllowEmpty = true, const CString& sLeft = "",
const CString& sRight = "", bool bTrimQuotes = true,
bool bTrimWhiteSpace = false) const;
/** Split up this string into tokens.
* This function is identical to the other CString::Split(), except that
* the result is returned as a SCString instead of a VCString.
*/
size_type Split(const CString& sDelim, SCString& ssRet,
bool bAllowEmpty = true, const CString& sLeft = "",
const CString& sRight = "", bool bTrimQuotes = true,
bool bTrimWhiteSpace = false) const;
/** Build a string from a format string, replacing values from a map.
* The format specification can contain simple named parameters that match
* keys in the given map. For example in the string "a {b} c", the key "b"
* is looked up in the map, and inserted for "{b}".
* @param sFormat The format specification.
* @param msValues A map of named parameters to their values.
* @return The string with named parameters replaced.
*/
static CString NamedFormat(const CString& sFormat,
const MCString& msValues);
/** Produces a random string.
* @param uLength The length of the resulting string.
* @return A random string.
*/
static CString RandomString(unsigned int uLength);
/** @return The MD5 hash of this string. */
CString MD5() const;
/** @return The SHA256 hash of this string. */
CString SHA256() const;
/** Treat this string as base64-encoded data and decode it.
* @param sRet String to which the result of the decode is safed.
* @return The length of the resulting string.
*/
unsigned long Base64Decode(CString& sRet) const;
/** Treat this string as base64-encoded data and decode it.
* The result is saved in this CString instance.
* @return The length of the resulting string.
*/
unsigned long Base64Decode();
/** Treat this string as base64-encoded data and decode it.
* @return The decoded string.
*/
CString Base64Decode_n() const;
/** Base64-encode the current string.
* @param sRet String where the result is saved.
* @param uWrap A boolean(!?!) that decides if the result should be
* wrapped after everywhere 57 characters.
* @return true unless this code is buggy.
* @todo WTF @ uWrap.
* @todo This only returns false if some formula we use was wrong?!
*/
bool Base64Encode(CString& sRet, unsigned int uWrap = 0) const;
/** Base64-encode the current string.
* This string is overwritten with the result of the encode.
* @todo return value and param are as with Base64Encode() from above.
*/
bool Base64Encode(unsigned int uWrap = 0);
/** Base64-encode the current string
* @todo uWrap is as broken as Base64Encode()'s uWrap.
* @return The encoded string.
*/
CString Base64Encode_n(unsigned int uWrap = 0) const;
#ifdef HAVE_LIBSSL
CString Encrypt_n(const CString& sPass, const CString& sIvec = "") const;
CString Decrypt_n(const CString& sPass, const CString& sIvec = "") const;
void Encrypt(const CString& sPass, const CString& sIvec = "");
void Decrypt(const CString& sPass, const CString& sIvec = "");
void Crypt(const CString& sPass, bool bEncrypt, const CString& sIvec = "");
#endif
/** Pretty-print a percent value.
* @param d The percent value. This should be in range 0-100.
* @return The "pretty" string.
*/
static CString ToPercent(double d);
/** Pretty-print a number of bytes.
* @param d The number of bytes.
* @return A string describing the number of bytes.
*/
static CString ToByteStr(unsigned long long d);
/** Pretty-print a time span.
* @param s Number of seconds to print.
* @return A string like "4w 6d 4h 3m 58s".
*/
static CString ToTimeStr(unsigned long s);
/** @return True if this string is not "false". */
bool ToBool() const;
/** @return The numerical value of this string similar to atoi(). */
short ToShort() const;
/** @return The numerical value of this string similar to atoi(). */
unsigned short ToUShort() const;
/** @return The numerical value of this string similar to atoi(). */
int ToInt() const;
/** @return The numerical value of this string similar to atoi(). */
long ToLong() const;
/** @return The numerical value of this string similar to atoi(). */
unsigned int ToUInt() const;
/** @return The numerical value of this string similar to atoi(). */
unsigned long ToULong() const;
/** @return The numerical value of this string similar to atoi(). */
unsigned long long ToULongLong() const;
/** @return The numerical value of this string similar to atoi(). */
long long ToLongLong() const;
/** @return The numerical value of this string similar to atoi(). */
double ToDouble() const;
/** Trim this string. All leading/trailing occurrences of characters from
* s are removed.
* @param s A list of characters that should be trimmed.
* @return true if this string was modified.
*/
bool Trim(const CString& s = " \t\r\n");
/** Trim this string. All leading occurrences of characters from s are
* removed.
* @param s A list of characters that should be trimmed.
* @return true if this string was modified.
*/
bool TrimLeft(const CString& s = " \t\r\n");
/** Trim this string. All trailing occurrences of characters from s are
* removed.
* @param s A list of characters that should be trimmed.
* @return true if this string was modified.
*/
bool TrimRight(const CString& s = " \t\r\n");
/** Trim this string. All leading/trailing occurrences of characters from
* s are removed. This CString instance is not modified.
* @param s A list of characters that should be trimmed.
* @return The trimmed string.
*/
CString Trim_n(const CString& s = " \t\r\n") const;
/** Trim this string. All leading occurrences of characters from s are
* removed. This CString instance is not modified.
* @param s A list of characters that should be trimmed.
* @return The trimmed string.
*/
CString TrimLeft_n(const CString& s = " \t\r\n") const;
/** Trim this string. All trailing occurrences of characters from s are
* removed. This CString instance is not modified.
* @param s A list of characters that should be trimmed.
* @return The trimmed string.
*/
CString TrimRight_n(const CString& s = " \t\r\n") const;
/** Trim a given prefix.
* @param sPrefix The prefix that should be removed.
* @return True if this string was modified.
*/
bool TrimPrefix(const CString& sPrefix = ":");
/** Trim a given suffix.
* @param sSuffix The suffix that should be removed.
* @return True if this string was modified.
*/
bool TrimSuffix(const CString& sSuffix);
/** Trim a given prefix.
* @param sPrefix The prefix that should be removed.
* @return A copy of this string without the prefix.
*/
CString TrimPrefix_n(const CString& sPrefix = ":") const;
/** Trim a given suffix.
* @param sSuffix The suffix that should be removed.
* @return A copy of this string without the prefix.
*/
CString TrimSuffix_n(const CString& sSuffix) const;
/** Find the position of the given substring.
* @param s The substring to search for.
* @param cs CaseSensitive if you want the comparison to be case
* sensitive, CaseInsensitive (default) otherwise.
* @return The position of the substring if found, CString::npos otherwise.
*/
size_t Find(const CString& s, CaseSensitivity cs = CaseInsensitive) const;
/** Check whether the string starts with a given prefix.
* @param sPrefix The prefix.
* @param cs CaseSensitive if you want the comparison to be case
* sensitive, CaseInsensitive (default) otherwise.
* @return True if the string starts with prefix, false otherwise.
*/
bool StartsWith(const CString& sPrefix,
CaseSensitivity cs = CaseInsensitive) const;
/** Check whether the string ends with a given suffix.
* @param sSuffix The suffix.
* @param cs CaseSensitive if you want the comparison to be case
* sensitive, CaseInsensitive (default) otherwise.
* @return True if the string ends with suffix, false otherwise.
*/
bool EndsWith(const CString& sSuffix,
CaseSensitivity cs = CaseInsensitive) const;
/**
* Check whether the string contains a given string.
* @param s The string to search.
* @param bCaseSensitive Whether the search is case sensitive.
* @return True if this string contains the other string, falser otherwise.
*/
bool Contains(const CString& s, CaseSensitivity cs = CaseInsensitive) const;
/** Remove characters from the beginning of this string.
* @param uLen The number of characters to remove.
* @return true if this string was modified.
*/
bool LeftChomp(size_type uLen = 1);
/** Remove characters from the end of this string.
* @param uLen The number of characters to remove.
* @return true if this string was modified.
*/
bool RightChomp(size_type uLen = 1);
/** Remove characters from the beginning of this string.
* This string object isn't modified.
* @param uLen The number of characters to remove.
* @return The result of the conversion.
*/
CString LeftChomp_n(size_type uLen = 1) const;
/** Remove characters from the end of this string.
* This string object isn't modified.
* @param uLen The number of characters to remove.
* @return The result of the conversion.
*/
CString RightChomp_n(size_type uLen = 1) const;
/** Remove controls characters from this string.
* Controls characters are color codes, and those in C0 set
* See https://en.wikipedia.org/wiki/C0_and_C1_control_codes
* @return The result of the conversion.
*/
CString& StripControls();
/** Remove controls characters from this string.
* Controls characters are color codes, and those in C0 set
* See https://en.wikipedia.org/wiki/C0_and_C1_control_codes
* This string object isn't modified.
* @return The result of the conversion.
*/
CString StripControls_n() const;
private:
protected:
unsigned char* strnchr(const unsigned char* src, unsigned char c,
unsigned int iMaxBytes,
unsigned char* pFill = nullptr,
unsigned int* piCount = nullptr) const;
};
/**
* @brief A dictionary for strings.
* @todo Replace with "using MCString = std::map<CString, CString>;" in ZNC 2.0
*
* This class maps strings to other strings.
*/
class MCString : public std::map<CString, CString> {
public:
/** Construct an empty MCString. */
MCString() : std::map<CString, CString>() {}
/** Construct a MCString using an initializer list eg. MCString m = { {"key1", "val1"}, {"key2", "val2"} }; */
MCString(std::initializer_list<std::pair<const CString, CString>> list)
: std::map<CString, CString>(list) {}
/** Destruct this MCString. */
virtual ~MCString() { clear(); }
/** A static instance of an empty map. */
static const MCString EmptyMap;
/** Status codes that can be returned by WriteToDisk() and
* ReadFromDisk(). */
enum status_t {
/// No errors.
MCS_SUCCESS = 0,
/// Opening the file failed.
MCS_EOPEN = 1,
/// Writing to the file failed.
MCS_EWRITE = 2,
/// WriteFilter() failed.
MCS_EWRITEFIL = 3,
/// ReadFilter() failed.
MCS_EREADFIL = 4
};
/** Write this map to a file.
* @param sPath The file name to write to.
* @param iMode The mode for the file.
* @return The result of the operation.
* @see WriteFilter.
*/
enum status_t WriteToDisk(const CString& sPath, mode_t iMode = 0644) const;
/** Read a map from a file.
* @param sPath The file name to read from.
* @return The result of the operation.
* @see ReadFilter.
*/
enum status_t ReadFromDisk(const CString& sPath);
/** Filter used while writing this map. This function is called by
* WriteToDisk() for each pair that is going to be written. This
* function has the chance to modify the data that will be written.
* @param sKey The key that will be written. Can be modified.
* @param sValue The value that will be written. Can be modified.
* @return true unless WriteToDisk() should fail with MCS_EWRITEFIL.
*/
virtual bool WriteFilter(CString& sKey, CString& sValue) const {
return true;
}
/** Filter used while reading this map. This function is called by
* ReadFromDisk() for each pair that is beging read. This function has
* the chance to modify the data that is being read.
* @param sKey The key that was read. Can be modified.
* @param sValue The value that was read. Can be modified.
* @return true unless ReadFromDisk() should fail with MCS_EWRITEFIL.
*/
virtual bool ReadFilter(CString& sKey, CString& sValue) const {
return true;
}
/** Encode a value so that it can safely be parsed by ReadFromDisk().
* This is an internal function.
*/
virtual CString& Encode(CString& sValue) const;
/** Undo the effects of Encode(). This is an internal function. */
virtual CString& Decode(CString& sValue) const;
};
namespace std {
template <>
struct hash<CString> : hash<std::string> {};
}
// Make translateable messages easy to write:
// t_f("Foo is {1}")(foo)
class CInlineFormatMessage {
public:
explicit CInlineFormatMessage(const CString& sFormat)
: m_sFormat(sFormat) {}
explicit CInlineFormatMessage(CString&& sFormat)
: m_sFormat(std::move(sFormat)) {}
template <typename... Args>
CString operator()(const Args&... args) const {
MCString values;
apply(values, 1, args...);
return CString::NamedFormat(m_sFormat, values);
}
private:
template <typename Arg, typename... Rest>
void apply(MCString& values, int index, const Arg& arg,
const Rest&... rest) const {
values[CString(index)] = CString(arg);
apply(values, index + 1, rest...);
}
void apply(MCString& values, int index) const {}
CString m_sFormat;
};
// For gtest
#ifdef GTEST_FAIL
inline void PrintTo(const CString& s, std::ostream* os) {
*os << '"' << s.Escape_n(CString::EDEBUG) << '"';
}
#endif
#endif // !ZNCSTRING_H
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