2023-12-14 21:54:22 +01:00
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#ifndef STRING_BUFFER_H
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#define STRING_BUFFER_H
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2023-12-17 15:39:29 +01:00
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2023-12-14 21:54:22 +01:00
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/* string_buffer.h */
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2023-12-17 15:39:29 +01:00
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2023-12-14 21:54:22 +01:00
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#include "core/string/ustring.h"
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template <int SHORT_BUFFER_SIZE = 64>
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class StringBuffer {
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CharType short_buffer[SHORT_BUFFER_SIZE];
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String buffer;
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int string_length;
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_FORCE_INLINE_ CharType *current_buffer_ptr() {
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return static_cast<String &>(buffer).empty() ? short_buffer : buffer.ptrw();
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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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StringBuffer() {
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string_length = 0;
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}
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};
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template <int SHORT_BUFFER_SIZE>
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StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::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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template <int SHORT_BUFFER_SIZE>
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StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::append(const String &p_string) {
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return append(p_string.get_data());
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}
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template <int SHORT_BUFFER_SIZE>
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StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::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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template <int SHORT_BUFFER_SIZE>
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StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::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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template <int SHORT_BUFFER_SIZE>
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StringBuffer<SHORT_BUFFER_SIZE> &StringBuffer<SHORT_BUFFER_SIZE>::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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}
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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.ptrw(), short_buffer, string_length * sizeof(CharType));
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}
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return *this;
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}
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template <int SHORT_BUFFER_SIZE>
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int StringBuffer<SHORT_BUFFER_SIZE>::length() const {
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return string_length;
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}
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template <int SHORT_BUFFER_SIZE>
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String StringBuffer<SHORT_BUFFER_SIZE>::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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template <int SHORT_BUFFER_SIZE>
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double StringBuffer<SHORT_BUFFER_SIZE>::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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template <int SHORT_BUFFER_SIZE>
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int64_t StringBuffer<SHORT_BUFFER_SIZE>::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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#endif
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