a lightweight and efficient implementation of the C-runtime standard library for C++20
Note
be aware that implementation of the some functions conform to the POSIX standard rather than the C standard. but inline intrinsics does preserve original C standard behaviour. see compability for details
you can also define the next values to include additional features:
| definition | note |
|---|---|
| Q_CRT_MEMORY_CRYPTO | add crypto-specific (timing-safe etc) memory functionality |
| Q_CRT_STRING_WIDE_TYPE | add full Unicode support for methods related to character types. note that this includes lookup tables with a total binary size of about ~11KB |
| Q_CRT_STRING_NATURAL | add functionality based on "natural" order comparison algorithm |
| Q_CRT_STRING_CONVERT | add string conversion functionality to convert strings to other data types and vice versa. note that this includes lookup tables with a total binary size of about ~1KB |
| Q_CRT_STRING_ENCODE | add encoding and decoding functionality, in particular UTF |
behaviour of some functions has been changed in favor of the POSIX specification or GNU extensions to make them more sensible or less complex:
| function | note |
|---|---|
| MemorySet | return value changed in favor of mempset(), type of the fill byte argument is changed to std::uint8_t |
| MemorySetW | return value changed in favor of wmempset() |
| MemoryCopy | return value changed in favor of mempcpy() |
| MemoryCopyW | return value changed in favor of wmempcpy() |
| StringCopy | return value changed in favor of stpcpy() / wcpcpy() |
| StringCopyN | return value changed in favor of stpncpy() / wcpncpy() |
| StringCat | return value changed in favor of stpcat() / wcpcat() |
| StringCatN | return value changed in favor of stpncat() / wcpncat() |
| StringSpan | return value changed in favor of strpspn() / wcspspn() |
other than that behaviour of the rest functions are based on ISO-9899 (C standard)
requires common library to be also installed. you can read about installation, contributing and look for other general information on the q-tee main page.