(str.size())) { }
#endif
/**
* Constructs from a const char * pointer and a specified length.
* @param offset a const char * pointer (need not be terminated)
* @param len the length of the string; must be non-negative
* @stable ICU 4.2
*/
StringPiece(const char* offset, int32_t len) : ptr_(offset), length_(len) { }
/**
* Substring of another StringPiece.
* @param x the other StringPiece
* @param pos start position in x; must be non-negative and <= x.length().
* @stable ICU 4.2
*/
StringPiece(const StringPiece& x, int32_t pos);
/**
* Substring of another StringPiece.
* @param x the other StringPiece
* @param pos start position in x; must be non-negative and <= x.length().
* @param len length of the substring;
* must be non-negative and will be pinned to at most x.length() - pos.
* @stable ICU 4.2
*/
StringPiece(const StringPiece& x, int32_t pos, int32_t len);
/**
* Returns the string pointer. May be NULL if it is empty.
*
* data() may return a pointer to a buffer with embedded NULs, and the
* returned buffer may or may not be null terminated. Therefore it is
* typically a mistake to pass data() to a routine that expects a NUL
* terminated string.
* @return the string pointer
* @stable ICU 4.2
*/
const char* data() const { return ptr_; }
/**
* Returns the string length. Same as length().
* @return the string length
* @stable ICU 4.2
*/
int32_t size() const { return length_; }
/**
* Returns the string length. Same as size().
* @return the string length
* @stable ICU 4.2
*/
int32_t length() const { return length_; }
/**
* Returns whether the string is empty.
* @return TRUE if the string is empty
* @stable ICU 4.2
*/
UBool empty() const { return length_ == 0; }
/**
* Sets to an empty string.
* @stable ICU 4.2
*/
void clear() { ptr_ = NULL; length_ = 0; }
/**
* Reset the stringpiece to refer to new data.
* @param xdata pointer the new string data. Need not be nul terminated.
* @param len the length of the new data
* @stable ICU 4.8
*/
void set(const char* xdata, int32_t len) { ptr_ = xdata; length_ = len; }
/**
* Reset the stringpiece to refer to new data.
* @param str a pointer to a NUL-terminated string.
* @stable ICU 4.8
*/
void set(const char* str);
/**
* Removes the first n string units.
* @param n prefix length, must be non-negative and <=length()
* @stable ICU 4.2
*/
void remove_prefix(int32_t n) {
if (n >= 0) {
if (n > length_) {
n = length_;
}
ptr_ += n;
length_ -= n;
}
}
/**
* Removes the last n string units.
* @param n suffix length, must be non-negative and <=length()
* @stable ICU 4.2
*/
void remove_suffix(int32_t n) {
if (n >= 0) {
if (n <= length_) {
length_ -= n;
} else {
length_ = 0;
}
}
}
/**
* Maximum integer, used as a default value for substring methods.
* @stable ICU 4.2
*/
static const int32_t npos = 0x7fffffff;
/**
* Returns a substring of this StringPiece.
* @param pos start position; must be non-negative and <= length().
* @param len length of the substring;
* must be non-negative and will be pinned to at most length() - pos.
* @return the substring StringPiece
* @stable ICU 4.2
*/
StringPiece substr(int32_t pos, int32_t len = npos) const {
return StringPiece(*this, pos, len);
}
};
/**
* Global operator == for StringPiece
* @param x The first StringPiece to compare.
* @param y The second StringPiece to compare.
* @return TRUE if the string data is equal
* @stable ICU 4.8
*/
U_EXPORT UBool U_EXPORT2
operator==(const StringPiece& x, const StringPiece& y);
/**
* Global operator != for StringPiece
* @param x The first StringPiece to compare.
* @param y The second StringPiece to compare.
* @return TRUE if the string data is not equal
* @stable ICU 4.8
*/
inline UBool operator!=(const StringPiece& x, const StringPiece& y) {
return !(x == y);
}
U_NAMESPACE_END
#endif // __STRINGPIECE_H__