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Use Span for String.sprintf, to accelerate vformat not needing to allocate an Array.

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This commit is contained in:
Lukas Tenbrink 2025-03-10 17:56:14 +01:00
parent 8b4b93a82e
commit a916325e6a
5 changed files with 14 additions and 9 deletions
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4
core/string/ustring.cpp
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@ -5461,7 +5461,7 @@ String String::lpad(int min_length, const String &character) const {
// "fish %s pie" % "frog"
// "fish %s %d pie" % ["frog", 12]
// In case of an error, the string returned is the error description and "error" is true.
String String::sprintf(const Array &values, bool *error) const {
String String::sprintf(const Span<Variant> &values, bool *error) const {
static const String ZERO("0");
static const String SPACE(" ");
static const String MINUS("-");
@ -5470,7 +5470,7 @@ String String::sprintf(const Array &values, bool *error) const {
String formatted;
char32_t *self = (char32_t *)get_data();
bool in_format = false;
int value_index = 0;
uint64_t value_index = 0;
int min_chars = 0;
int min_decimals = 0;
bool in_decimals = false;

2
core/string/ustring.h
View file

@ -438,7 +438,7 @@ public:
String trim_suffix(const char *p_suffix) const;
String lpad(int min_length, const String &character = " ") const;
String rpad(int min_length, const String &character = " ") const;
String sprintf(const Array &values, bool *error) const;
String sprintf(const Span<Variant> &values, bool *error) const;
String quote(const String &quotechar = "\"") const;
String unquote() const;
static String num(double p_num, int p_decimals = -1);

4
core/variant/array.cpp
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@ -936,6 +936,10 @@ bool Array::is_read_only() const {
return _p->read_only != nullptr;
}
Span<Variant> Array::span() const {
return _p->array.span();
}
Array::Array(const Array &p_from) {
_p = nullptr;
_ref(p_from);

6
core/variant/array.h
View file

@ -30,6 +30,7 @@
#pragma once
#include "core/templates/span.h"
#include "core/typedefs.h"
#include "core/variant/variant_deep_duplicate.h"
@ -201,6 +202,11 @@ public:
bool is_read_only() const;
static Array create_read_only();
Span<Variant> span() const;
operator Span<Variant>() const {
return this->span();
}
Array(const Array &p_base, uint32_t p_type, const StringName &p_class_name, const Variant &p_script);
Array(const Array &p_from);
Array(std::initializer_list<Variant> p_init);

7
core/variant/variant.h
View file

@ -925,14 +925,9 @@ const Variant::ObjData &Variant::_get_obj() const {
template <typename... VarArgs>
String vformat(const String &p_text, const VarArgs... p_args) {
Variant args[sizeof...(p_args) + 1] = { p_args..., Variant() }; // +1 makes sure zero sized arrays are also supported.
Array args_array;
args_array.resize(sizeof...(p_args));
for (uint32_t i = 0; i < sizeof...(p_args); i++) {
args_array[i] = args[i];
}
bool error = false;
String fmt = p_text.sprintf(args_array, &error);
String fmt = p_text.sprintf(Span(args, sizeof...(p_args)), &error);
ERR_FAIL_COND_V_MSG(error, String(), String("Formatting error in string \"") + p_text + "\": " + fmt + ".");