Add StringBuffer class
This commit is contained in:
Evgeny Zuev
parent
2802dced84
commit
cae0059d5f
2 changed files with 184 additions and 0 deletions
102
core/string_buffer.cpp
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102
core/string_buffer.cpp
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/*************************************************************************/
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/* string_buffer.cpp */
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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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 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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#include "string_buffer.h"
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#include <string.h>
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StringBuffer &StringBuffer::append(CharType p_char) {
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reserve(string_length + 2);
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current_buffer_ptr()[string_length++] = p_char;
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return *this;
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}
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StringBuffer &StringBuffer::append(const String &p_string) {
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return append(p_string.c_str());
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}
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StringBuffer &StringBuffer::append(const char *p_str) {
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int len = strlen(p_str);
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reserve(string_length + len + 1);
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CharType *buf = current_buffer_ptr();
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for (const char *c_ptr = p_str; c_ptr; ++c_ptr) {
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buf[string_length++] = *c_ptr;
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}
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return *this;
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}
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StringBuffer &StringBuffer::append(const CharType *p_str, int p_clip_to_len) {
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int len = 0;
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while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
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++len;
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}
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reserve(string_length + len + 1);
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memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(CharType));
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string_length += len;
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return *this;
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}
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StringBuffer &StringBuffer::reserve(int p_size) {
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if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size())
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return *this;
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bool need_copy = string_length > 0 && buffer.empty();
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buffer.resize(next_power_of_2(p_size));
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if (need_copy) {
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memcpy(buffer.ptr(), short_buffer, string_length * sizeof(CharType));
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}
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return *this;
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}
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int StringBuffer::length() const {
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return string_length;
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}
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String StringBuffer::as_string() {
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current_buffer_ptr()[string_length] = '\0';
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if (buffer.empty()) {
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return String(short_buffer);
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} else {
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buffer.resize(string_length + 1);
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return buffer;
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}
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}
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double StringBuffer::as_double() {
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current_buffer_ptr()[string_length] = '\0';
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return String::to_double(current_buffer_ptr());
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}
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int64_t StringBuffer::as_int() {
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current_buffer_ptr()[string_length] = '\0';
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return String::to_int(current_buffer_ptr());
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}
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82
core/string_buffer.h
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82
core/string_buffer.h
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/*************************************************************************/
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/* string_buffer.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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 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 STRING_BUFFER_H
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#define STRING_BUFFER_H
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#include "ustring.h"
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class StringBuffer {
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static const int SHORT_BUFFER_SIZE = 64;
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CharType short_buffer[SHORT_BUFFER_SIZE];
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String buffer;
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int string_length = 0;
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_FORCE_INLINE_ CharType *current_buffer_ptr() {
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return static_cast<Vector<CharType> &>(buffer).empty() ? short_buffer : buffer.ptr();
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}
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public:
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StringBuffer &append(CharType p_char);
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StringBuffer &append(const String &p_string);
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StringBuffer &append(const char *p_str);
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StringBuffer &append(const CharType *p_str, int p_clip_to_len = -1);
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_FORCE_INLINE_ void operator+=(CharType p_char) {
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append(p_char);
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}
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_FORCE_INLINE_ void operator+=(const String &p_string) {
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append(p_string);
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}
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_FORCE_INLINE_ void operator+=(const char *p_str) {
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append(p_str);
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}
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_FORCE_INLINE_ void operator+=(const CharType *p_str) {
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append(p_str);
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}
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StringBuffer &reserve(int p_size);
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int length() const;
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String as_string();
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double as_double();
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int64_t as_int();
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_FORCE_INLINE_ operator String() {
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return as_string();
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}
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};
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#endif
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