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4e25e5066b
By introducing an intermediate proxy class for the array subscript operator for String and CharString we can control better when CowData will actually CoW. This should improve performance of String usage for most cases.
401 lines
14 KiB
C++
401 lines
14 KiB
C++
/*************************************************************************/
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/* ustring.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef USTRING_H
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#define USTRING_H
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#include "core/array.h"
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#include "core/cowdata.h"
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#include "core/typedefs.h"
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#include "core/vector.h"
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/**
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@author Juan Linietsky <reduzio@gmail.com>
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*/
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template <class T>
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class CharProxy {
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friend class CharString;
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friend class String;
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const int _index;
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CowData<T> &_cowdata;
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_FORCE_INLINE_ CharProxy(const int &p_index, CowData<T> &cowdata) :
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_index(p_index),
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_cowdata(cowdata) {}
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public:
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_FORCE_INLINE_ operator T() const {
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return _cowdata.get(_index);
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}
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_FORCE_INLINE_ const T *operator&() const {
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return _cowdata.ptr() + _index;
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}
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_FORCE_INLINE_ void operator=(const T &other) const {
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_cowdata.set(_index, other);
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}
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_FORCE_INLINE_ void operator=(const CharProxy<T> &other) const {
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_cowdata.set(_index, other.operator T());
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}
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};
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class CharString {
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CowData<char> _cowdata;
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public:
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_FORCE_INLINE_ char *ptrw() { return _cowdata.ptrw(); }
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_FORCE_INLINE_ const char *ptr() const { return _cowdata.ptr(); }
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_FORCE_INLINE_ int size() const { return _cowdata.size(); }
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Error resize(int p_size) { return _cowdata.resize(p_size); }
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_FORCE_INLINE_ char get(int p_index) { return _cowdata.get(p_index); }
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_FORCE_INLINE_ const char get(int p_index) const { return _cowdata.get(p_index); }
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_FORCE_INLINE_ void set(int p_index, const char &p_elem) { _cowdata.set(p_index, p_elem); }
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_FORCE_INLINE_ const char &operator[](int p_index) const { return _cowdata.get(p_index); }
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_FORCE_INLINE_ CharProxy<char> operator[](int p_index) { return CharProxy<char>(p_index, _cowdata); }
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_FORCE_INLINE_ CharString() {}
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_FORCE_INLINE_ CharString(const CharString &p_str) { _cowdata._ref(p_str._cowdata); }
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bool operator<(const CharString &p_right) const;
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CharString &operator+=(char p_char);
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int length() const { return size() ? size() - 1 : 0; }
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const char *get_data() const;
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operator const char *() const { return get_data(); };
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};
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typedef wchar_t CharType;
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struct StrRange {
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const CharType *c_str;
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int len;
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StrRange(const CharType *p_c_str = NULL, int p_len = 0) {
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c_str = p_c_str;
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len = p_len;
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}
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};
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class String {
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CowData<CharType> _cowdata;
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void copy_from(const char *p_cstr);
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void copy_from(const CharType *p_cstr, const int p_clip_to = -1);
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void copy_from(const CharType &p_char);
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void copy_from_unchecked(const CharType *p_char, const int p_length);
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bool _base_is_subsequence_of(const String &p_string, bool case_insensitive) const;
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public:
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enum {
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npos = -1 ///<for "some" compatibility with std::string (npos is a huge value in std::string)
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};
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_FORCE_INLINE_ CharType *ptrw() { return _cowdata.ptrw(); }
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_FORCE_INLINE_ const CharType *ptr() const { return _cowdata.ptr(); }
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void remove(int p_index) { _cowdata.remove(p_index); }
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_FORCE_INLINE_ void clear() { resize(0); }
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_FORCE_INLINE_ CharType get(int p_index) { return _cowdata.get(p_index); }
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_FORCE_INLINE_ const CharType get(int p_index) const { return _cowdata.get(p_index); }
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_FORCE_INLINE_ void set(int p_index, const CharType &p_elem) { _cowdata.set(p_index, p_elem); }
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_FORCE_INLINE_ int size() const { return _cowdata.size(); }
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Error resize(int p_size) { return _cowdata.resize(p_size); }
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_FORCE_INLINE_ const CharType &operator[](int p_index) const { return _cowdata.get(p_index); }
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_FORCE_INLINE_ CharProxy<CharType> operator[](int p_index) { return CharProxy<CharType>(p_index, _cowdata); }
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bool operator==(const String &p_str) const;
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bool operator!=(const String &p_str) const;
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String operator+(const String &p_str) const;
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//String operator+(CharType p_char) const;
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String &operator+=(const String &);
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String &operator+=(CharType p_char);
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String &operator+=(const char *p_str);
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String &operator+=(const CharType *p_str);
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/* Compatibility Operators */
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void operator=(const char *p_str);
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void operator=(const CharType *p_str);
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bool operator==(const char *p_str) const;
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bool operator==(const CharType *p_str) const;
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bool operator==(const StrRange &p_str_range) const;
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bool operator!=(const char *p_str) const;
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bool operator!=(const CharType *p_str) const;
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bool operator<(const CharType *p_str) const;
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bool operator<(const char *p_str) const;
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bool operator<(const String &p_str) const;
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bool operator<=(const String &p_str) const;
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signed char casecmp_to(const String &p_str) const;
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signed char nocasecmp_to(const String &p_str) const;
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signed char naturalnocasecmp_to(const String &p_str) const;
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const CharType *c_str() const;
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/* standard size stuff */
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_FORCE_INLINE_ int length() const {
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int s = size();
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return s ? (s - 1) : 0; // length does not include zero
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}
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/* complex helpers */
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String substr(int p_from, int p_chars) const;
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int find(const String &p_str, int p_from = 0) const; ///< return <0 if failed
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int find(const char *p_str, int p_from) const; ///< return <0 if failed
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int find_last(const String &p_str) const; ///< return <0 if failed
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int findn(const String &p_str, int p_from = 0) const; ///< return <0 if failed, case insensitive
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int rfind(const String &p_str, int p_from = -1) const; ///< return <0 if failed
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int rfindn(const String &p_str, int p_from = -1) const; ///< return <0 if failed, case insensitive
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int findmk(const Vector<String> &p_keys, int p_from = 0, int *r_key = NULL) const; ///< return <0 if failed
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bool match(const String &p_wildcard) const;
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bool matchn(const String &p_wildcard) const;
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bool begins_with(const String &p_string) const;
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bool begins_with(const char *p_string) const;
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bool ends_with(const String &p_string) const;
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bool is_enclosed_in(const String &p_string) const;
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bool is_subsequence_of(const String &p_string) const;
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bool is_subsequence_ofi(const String &p_string) const;
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bool is_quoted() const;
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Vector<String> bigrams() const;
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float similarity(const String &p_string) const;
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String format(const Variant &values, String placeholder = "{_}") const;
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String replace_first(const String &p_key, const String &p_with) const;
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String replace(const String &p_key, const String &p_with) const;
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String replace(const char *p_key, const char *p_with) const;
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String replacen(const String &p_key, const String &p_with) const;
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String insert(int p_at_pos, const String &p_string) const;
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String pad_decimals(int p_digits) const;
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String pad_zeros(int p_digits) const;
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String trim_prefix(const String &p_prefix) const;
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String trim_suffix(const String &p_suffix) const;
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String lpad(int min_length, const String &character = " ") const;
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String rpad(int min_length, const String &character = " ") const;
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String sprintf(const Array &values, bool *error) const;
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String quote(String quotechar = "\"") const;
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String unquote() const;
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static String num(double p_num, int p_decimals = -1);
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static String num_scientific(double p_num);
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static String num_real(double p_num);
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static String num_int64(int64_t p_num, int base = 10, bool capitalize_hex = false);
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static String num_uint64(uint64_t p_num, int base = 10, bool capitalize_hex = false);
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static String chr(CharType p_char);
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static String md5(const uint8_t *p_md5);
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static String hex_encode_buffer(const uint8_t *p_buffer, int p_len);
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bool is_numeric() const;
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double to_double() const;
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float to_float() const;
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int hex_to_int(bool p_with_prefix = true) const;
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int to_int() const;
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int64_t hex_to_int64(bool p_with_prefix = true) const;
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int64_t to_int64() const;
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static int to_int(const char *p_str, int p_len = -1);
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static double to_double(const char *p_str);
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static double to_double(const CharType *p_str, const CharType **r_end = NULL);
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static int64_t to_int(const CharType *p_str, int p_len = -1);
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String capitalize() const;
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String camelcase_to_underscore(bool lowercase = true) const;
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int get_slice_count(String p_splitter) const;
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String get_slice(String p_splitter, int p_slice) const;
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String get_slicec(CharType p_splitter, int p_slice) const;
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Vector<String> split(const String &p_splitter, bool p_allow_empty = true, int p_maxsplit = 0) const;
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Vector<String> rsplit(const String &p_splitter, bool p_allow_empty = true, int p_maxsplit = 0) const;
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Vector<String> split_spaces() const;
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Vector<float> split_floats(const String &p_splitter, bool p_allow_empty = true) const;
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Vector<float> split_floats_mk(const Vector<String> &p_splitters, bool p_allow_empty = true) const;
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Vector<int> split_ints(const String &p_splitter, bool p_allow_empty = true) const;
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Vector<int> split_ints_mk(const Vector<String> &p_splitters, bool p_allow_empty = true) const;
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String join(Vector<String> parts);
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static CharType char_uppercase(CharType p_char);
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static CharType char_lowercase(CharType p_char);
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String to_upper() const;
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String to_lower() const;
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String left(int p_pos) const;
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String right(int p_pos) const;
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String dedent() const;
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String strip_edges(bool left = true, bool right = true) const;
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String strip_escapes() const;
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String lstrip(const String &p_chars) const;
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String rstrip(const String &p_chars) const;
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String get_extension() const;
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String get_basename() const;
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String plus_file(const String &p_file) const;
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CharType ord_at(int p_idx) const;
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void erase(int p_pos, int p_chars);
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CharString ascii(bool p_allow_extended = false) const;
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CharString utf8() const;
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bool parse_utf8(const char *p_utf8, int p_len = -1); //return true on error
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static String utf8(const char *p_utf8, int p_len = -1);
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static uint32_t hash(const CharType *p_cstr, int p_len); /* hash the string */
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static uint32_t hash(const CharType *p_cstr); /* hash the string */
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static uint32_t hash(const char *p_cstr, int p_len); /* hash the string */
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static uint32_t hash(const char *p_cstr); /* hash the string */
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uint32_t hash() const; /* hash the string */
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uint64_t hash64() const; /* hash the string */
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String md5_text() const;
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String sha256_text() const;
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Vector<uint8_t> md5_buffer() const;
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Vector<uint8_t> sha256_buffer() const;
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_FORCE_INLINE_ bool empty() const { return length() == 0; }
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// path functions
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bool is_abs_path() const;
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bool is_rel_path() const;
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bool is_resource_file() const;
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String path_to(const String &p_path) const;
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String path_to_file(const String &p_path) const;
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String get_base_dir() const;
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String get_file() const;
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static String humanize_size(size_t p_size);
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String simplify_path() const;
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String xml_escape(bool p_escape_quotes = false) const;
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String xml_unescape() const;
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String http_escape() const;
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String http_unescape() const;
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String c_escape() const;
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String c_escape_multiline() const;
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String c_unescape() const;
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String json_escape() const;
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String word_wrap(int p_chars_per_line) const;
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String percent_encode() const;
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String percent_decode() const;
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bool is_valid_identifier() const;
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bool is_valid_integer() const;
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bool is_valid_float() const;
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bool is_valid_hex_number(bool p_with_prefix) const;
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bool is_valid_html_color() const;
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bool is_valid_ip_address() const;
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/**
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* The constructors must not depend on other overloads
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*/
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/* String(CharType p_char);*/
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_FORCE_INLINE_ String() {}
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_FORCE_INLINE_ String(const String &p_str) { _cowdata._ref(p_str._cowdata); }
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String(const char *p_str);
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String(const CharType *p_str, int p_clip_to_len = -1);
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String(const StrRange &p_range);
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};
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bool operator==(const char *p_chr, const String &p_str);
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String operator+(const char *p_chr, const String &p_str);
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String operator+(CharType p_chr, const String &p_str);
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String itos(int64_t p_val);
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String rtos(double p_val);
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String rtoss(double p_val); //scientific version
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struct NoCaseComparator {
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bool operator()(const String &p_a, const String &p_b) const {
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return p_a.nocasecmp_to(p_b) < 0;
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}
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};
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struct NaturalNoCaseComparator {
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bool operator()(const String &p_a, const String &p_b) const {
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return p_a.naturalnocasecmp_to(p_b) < 0;
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}
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};
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template <typename L, typename R>
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_FORCE_INLINE_ bool is_str_less(const L *l_ptr, const R *r_ptr) {
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while (true) {
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if (*l_ptr == 0 && *r_ptr == 0)
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return false;
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else if (*l_ptr == 0)
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return true;
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else if (*r_ptr == 0)
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return false;
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else if (*l_ptr < *r_ptr)
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return true;
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else if (*l_ptr > *r_ptr)
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return false;
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l_ptr++;
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r_ptr++;
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}
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CRASH_COND(true); // unreachable
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}
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/* end of namespace */
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//tool translate
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#ifdef TOOLS_ENABLED
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String TTR(const String &);
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#else
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#define TTR(m_val) (String())
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#endif
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//tool or regular translate
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String RTR(const String &);
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bool is_symbol(CharType c);
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bool select_word(const String &p_s, int p_col, int &r_beg, int &r_end);
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#endif // USTRING_H
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