Format Buffer is a very lightweight header only library to write a format string to a buffer. It only supports the most basic format specifiers and floating point formats are omitted on purpose with the exception of hexadecimal binary scientific notation to keep things simple.
A format specifier follows this prototype: '%[flags][width]specifier'
| Specifier | Description |
|---|---|
| d | Signed Decimal Integer |
| u | Unsigned Decimal Integer |
| x | Integer in Hexadecimal Format |
| b | Integer in Binary Format |
| c | Single Character |
| s | String of Characters (null-terminated) |
| a | Floating Point in Hexadecimal Binary Scientific Notation |
| % | The '%' Character |
| Flags | Description |
|---|---|
| 0 | Changes the default padding character from space to zero. |
| Width | Description |
|---|---|
| (number) | The minimum number of characters to be printed. |
// prints "2136"
FormatBuffer<1024> buf{"%d", 2136};
std::cout << buf.c_str() << std::endl;
// prints "0x1.91eb86p+1"
char buf[1024];
FormatBuffer::print(buf, "%a", 3.14f);
std::cout << buf.c_str() << std::endl;