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#pragma once
// THIS FILE A COMPAT STUB HEADER
#include <cstring>
#include <cstdarg>
#include <algorithm>
#include <util/system/defaults.h>
#include <util/generic/string.h>
#include <util/generic/strbuf.h>
/// @addtogroup Strings_Miscellaneous
/// @{
int a2i(const TString& s);
/// Removes the last character if it is equal to c.
template <class T>
inline void RemoveIfLast(T& s, int c) {
const size_t length = s.length();
if (length && s[length - 1] == c) {
s.remove(length - 1);
}
}
/// Adds lastCh symbol to the the of the string if it is not already there.
inline void addIfNotLast(TString& s, int lastCh) {
size_t len = s.length();
if (!len || s[len - 1] != lastCh) {
s.append(char(lastCh));
}
}
/// @details Finishes the string with lastCh1 if lastCh2 is not present in the string and lastCh1 is not already at the end of the string.
/// Else, if lastCh2 is not equal to the symbol before the last, it finishes the string with lastCh2.
/// @todo ?? Define, when to apply the function. Is in use several times for URLs parsing.
inline void addIfAbsent(TString& s, char lastCh1, char lastCh2) {
size_t pos = s.find(lastCh2);
if (pos == TString::npos) {
// s.append((char)lastCh1);
addIfNotLast(s, lastCh1);
} else if (pos < s.length() - 1) {
addIfNotLast(s, lastCh2);
}
}
/// @}
/*
* ------------------------------------------------------------------
*
* A fast implementation of glibc's functions;
* strspn, strcspn and strpbrk.
*
* ------------------------------------------------------------------
*/
struct ui8_256 {
// forward chars table
ui8 chars_table[256];
// reverse (for c* functions) chars table
ui8 c_chars_table[256];
};
class str_spn: public ui8_256 {
public:
explicit str_spn(const char* charset, bool extended = false) {
// exteneded: if true, treat charset string more like
// interior of brackets [ ], e.g. "a-z0-9"
init(charset, extended);
}
/// Return first character in table, like strpbrk()
/// That is, skip all characters not in table
/// [DIFFERENCE FOR NOT_FOUND CASE: Returns end of string, not NULL]
const char* brk(const char* s) const {
while (c_chars_table[(ui8)*s]) {
++s;
}
return s;
}
const char* brk(const char* s, const char* e) const {
while (s < e && c_chars_table[(ui8)*s]) {
++s;
}
return s;
}
/// Return first character not in table, like strpbrk() for inverted table.
/// That is, skip all characters in table
const char* cbrk(const char* s) const {
while (chars_table[(ui8)*s]) {
++s;
}
return s;
}
const char* cbrk(const char* s, const char* e) const {
while (s < e && chars_table[(ui8)*s]) {
++s;
}
return s;
}
/// Offset of the first character not in table, like strspn().
size_t spn(const char* s) const {
return cbrk(s) - s;
}
size_t spn(const char* s, const char* e) const {
return cbrk(s, e) - s;
}
/// Offset of the first character in table, like strcspn().
size_t cspn(const char* s) const {
return brk(s) - s;
}
size_t cspn(const char* s, const char* e) const {
return brk(s, e) - s;
}
char* brk(char* s) const {
return const_cast<char*>(brk((const char*)s));
}
char* cbrk(char* s) const {
return const_cast<char*>(cbrk((const char*)s));
}
/// See strsep [BUT argument is *&, not **]
char* sep(char*& s) const {
char sep_char; // unused;
return sep(s, sep_char);
}
/// strsep + remember character that was destroyed
char* sep(char*& s, char& sep_char) const {
if (!s) {
return nullptr;
}
char* ret = s;
char* next = brk(ret);
if (*next) {
sep_char = *next;
*next = 0;
s = next + 1;
} else {
sep_char = 0;
s = nullptr;
}
return ret;
}
protected:
void init(const char* charset, bool extended);
str_spn() = default;
};
// an analogue of tr/$from/$to/
class Tr {
public:
Tr(const char* from, const char* to);
char ConvertChar(char ch) const {
return Map[(ui8)ch];
}
void Do(char* s) const {
for (; *s; s++) {
*s = ConvertChar(*s);
}
}
void Do(const char* src, char* dst) const {
for (; *src; src++) {
*dst++ = ConvertChar(*src);
}
*dst = 0;
}
void Do(char* s, size_t l) const {
for (size_t i = 0; i < l && s[i]; i++) {
s[i] = ConvertChar(s[i]);
}
}
void Do(TString& str) const;
private:
char Map[256];
size_t FindFirstChangePosition(const TString& str) const;
};
// Removes all occurrences of given character from string
template <typename TStringType>
void RemoveAll(TStringType& str, typename TStringType::char_type ch) {
size_t pos = str.find(ch); // 'find' to avoid cloning of string in 'TString.begin()'
if (pos == TStringType::npos) {
return;
}
typename TStringType::iterator begin = str.begin();
typename TStringType::iterator end = begin + str.length();
typename TStringType::iterator it = std::remove(begin + pos, end, ch);
str.erase(it, end);
}
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