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add template argument for size in StringBuffer

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Until now the pre-allocated array size was defined to be 64 without
a way of adjusting it from the calling side.

This commit adds the size as a template parameter.
This commit is contained in:
karroffel 2018-01-20 20:03:17 +01:00
parent 00387cbe1b
commit ac2a9bb267
3 changed files with 84 additions and 107 deletions
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103
core/string_buffer.cpp
View file

@ -1,103 +0,0 @@
/*************************************************************************/
/* string_buffer.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "string_buffer.h"
#include <string.h>
StringBuffer &StringBuffer::append(CharType p_char) {
reserve(string_length + 2);
current_buffer_ptr()[string_length++] = p_char;
return *this;
}
StringBuffer &StringBuffer::append(const String &p_string) {
return append(p_string.c_str());
}
StringBuffer &StringBuffer::append(const char *p_str) {
int len = strlen(p_str);
reserve(string_length + len + 1);
CharType *buf = current_buffer_ptr();
for (const char *c_ptr = p_str; *c_ptr; ++c_ptr) {
buf[string_length++] = *c_ptr;
}
return *this;
}
StringBuffer &StringBuffer::append(const CharType *p_str, int p_clip_to_len) {
int len = 0;
while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
++len;
}
reserve(string_length + len + 1);
memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(CharType));
string_length += len;
return *this;
}
StringBuffer &StringBuffer::reserve(int p_size) {
if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size())
return *this;
bool need_copy = string_length > 0 && buffer.empty();
buffer.resize(next_power_of_2(p_size));
if (need_copy) {
memcpy(buffer.ptrw(), short_buffer, string_length * sizeof(CharType));
}
return *this;
}
int StringBuffer::length() const {
return string_length;
}
String StringBuffer::as_string() {
current_buffer_ptr()[string_length] = '\0';
if (buffer.empty()) {
return String(short_buffer);
} else {
buffer.resize(string_length + 1);
return buffer;
}
}
double StringBuffer::as_double() {
current_buffer_ptr()[string_length] = '\0';
return String::to_double(current_buffer_ptr());
}
int64_t StringBuffer::as_int() {
current_buffer_ptr()[string_length] = '\0';
return String::to_int(current_buffer_ptr());
}

82
core/string_buffer.h
View file

@ -32,9 +32,10 @@
#define STRING_BUFFER_H
#include "ustring.h"
#include <string.h>
template <int SHORT_BUFFER_SIZE = 64>
class StringBuffer {
static const int SHORT_BUFFER_SIZE = 64;
CharType short_buffer[SHORT_BUFFER_SIZE];
String buffer;
@ -80,4 +81,83 @@ public:
}
};
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(CharType p_char) {
reserve(string_length + 2);
current_buffer_ptr()[string_length++] = p_char;
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const String &p_string) {
return append(p_string.c_str());
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const char *p_str) {
int len = strlen(p_str);
reserve(string_length + len + 1);
CharType *buf = current_buffer_ptr();
for (const char *c_ptr = p_str; *c_ptr; ++c_ptr) {
buf[string_length++] = *c_ptr;
}
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const CharType *p_str, int p_clip_to_len) {
int len = 0;
while ((p_clip_to_len < 0 || len < p_clip_to_len) && p_str[len]) {
++len;
}
reserve(string_length + len + 1);
memcpy(&(current_buffer_ptr()[string_length]), p_str, len * sizeof(CharType));
string_length += len;
return *this;
}
template <int SHORT_BUFFER_SIZE>
StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::reserve(int p_size) {
if (p_size < SHORT_BUFFER_SIZE || p_size < buffer.size())
return *this;
bool need_copy = string_length > 0 && buffer.empty();
buffer.resize(next_power_of_2(p_size));
if (need_copy) {
memcpy(buffer.ptrw(), short_buffer, string_length * sizeof(CharType));
}
return *this;
}
template <int SHORT_BUFFER_SIZE>
int StringBuffer<SHORT_BUFFER_SIZE>::length() const {
return string_length;
}
template <int SHORT_BUFFER_SIZE>
String StringBuffer<SHORT_BUFFER_SIZE>::as_string() {
current_buffer_ptr()[string_length] = '\0';
if (buffer.empty()) {
return String(short_buffer);
} else {
buffer.resize(string_length + 1);
return buffer;
}
}
template <int SHORT_BUFFER_SIZE>
double StringBuffer<SHORT_BUFFER_SIZE>::as_double() {
current_buffer_ptr()[string_length] = '\0';
return String::to_double(current_buffer_ptr());
}
template <int SHORT_BUFFER_SIZE>
int64_t StringBuffer<SHORT_BUFFER_SIZE>::as_int() {
current_buffer_ptr()[string_length] = '\0';
return String::to_int(current_buffer_ptr());
}
#endif

6
core/variant_parser.cpp
View file

@ -178,7 +178,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
};
case '#': {
StringBuffer color_str;
StringBuffer<> color_str;
color_str += '#';
while (true) {
CharType ch = p_stream->get_char();
@ -299,7 +299,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
if (cchar == '-' || (cchar >= '0' && cchar <= '9')) {
//a number
StringBuffer num;
StringBuffer<> num;
#define READING_SIGN 0
#define READING_INT 1
#define READING_DEC 2
@ -378,7 +378,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
} else if ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_') {
StringBuffer id;
StringBuffer<> id;
bool first = true;
while ((cchar >= 'A' && cchar <= 'Z') || (cchar >= 'a' && cchar <= 'z') || cchar == '_' || (!first && cchar >= '0' && cchar <= '9')) {