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AK: Use stack buffers in String::number() to avoid some malloc() calls

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This commit is contained in:
Andreas Kling 2019-12-30 14:52:04 +01:00
parent 1b2c6e8f41
commit a88d409c74
1 changed files with 16 additions and 4 deletions
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20
AK/String.cpp
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@ -3,6 +3,10 @@
#include <AK/StringBuilder.h>
#include <stdarg.h>
#ifndef KERNEL
#include <inttypes.h>
#endif
#ifdef KERNEL
extern "C" char* strstr(const char* haystack, const char* needle);
#endif
@ -208,21 +212,28 @@ unsigned String::to_uint(bool& ok) const
String String::number(u64 value)
{
int size;
char buffer[32];
#ifdef __serenity__
return String::format("%Q", value);
size = sprintf(buffer, "%llu", value);
#else
return String::format("%llu", value);
size = sprintf(buffer, "%" PRIu64, value);
#endif
return String(buffer, size);
}
String String::number(u32 value)
{
return String::format("%u", value);
char buffer[32];
int size = sprintf(buffer, "%u", value);
return String(buffer, size);
}
String String::number(i32 value)
{
return String::format("%d", value);
char buffer[32];
int size = sprintf(buffer, "%d", value);
return String(buffer, size);
}
String String::format(const char* fmt, ...)
@ -343,3 +354,4 @@ bool String::equals_ignoring_case(const StringView& other) const
}
}