Moves the qbs, command, and error handling APIs into separate .cpp files
in libqb/src/. This makes only minor changes to the actual code beyond
moving the logic, many global variables are left in place to be dealt
with in further changes.
Fixes: #146
With the removal of `using namespace std;` we inadvertently started
using some of the global math.h versions of these functions, which take
different types and resulting in computation errors.
The fix is to prefix all these functions with std:: so that we go back
to using the std:: versions.
Currently the Keyboard _Devices entry on Windows does not report all the
key presses and releases. This is due to missing some messages in the
form of WM_SYSKEYDOWN and WM_SYSKEYUP. Additionally Windows is weird
about report the state of the individual shift keys, so we add some
logic using GetAsyncKeyState() to fix that up.
Fixes: #333
The command Sleep is supposed to allow timers to trigger while the
program is sleeping on the delay. This is achieved in QB64 by having
commands that do delays manually call evnt() to trigger events if they
come up (of which timers are one).
Sleep has a custom implementation for console programs on Windows which
doesn't do this, so I redid the logic so that it calls evnt() at regular
intervals while waiting for input. Additionally, due to now calling
evnt() we also need to check if we should exit sleep early due to an
evnt() firing.
Fixes: #294
Currently main() includes logic that is intended to sync time() with
GetTicks() for the purpose of using GetTicks() to get millisecond
accuracy with time(), which only has second accuracy. Unfortunately, the
'syncing' up of these time sources results in an average of a half
second delay in starting a QB64-PE program.
This logic is easly replaced with std::chrono, which provides a real
time clock which is also millisecond accurate. That removes the need to
use time() and GetTicks() together to get millisecond accuracy, and
means the delay syncing them is no longer necessary.
I also separated most of the "delay" and "time" related functions into
datetime.cpp, and included the new std::chrono code into that file.
Since I needed to call some of the rounding functions in datetime.cpp I
also moved that stuff out into its own .cpp and header files to clean
things up a bit.
Fixes: #282
