Fairly simple, MacOS High Sierra's libcurl version is too old and not
have `CURLINFO_CONTENT_LENGTH_DOWNLOAD_T`. This adds a version check to
use the older version of that command which gives back a double instead.
Fixes: #287
- removed the old (commented out) curl stuff
- add another note to the error message
- simplified the libcurl download loop to use only EOF and not LOF anymore
- add a hidden external curl fallback option, read comments from line 1140 for more info
- former versions did simply link to the top of the referenced page, ignoring the link anchor value (#)
- now links can point to any page section heading and the section (if found) is placed in the visible area
- to try use the links in the bottom nav section on the alphabetical index
This helps when compiling several files in a row very quickly, Mac OS
only has a one second accuracy on the file modification time which can
cause Make to not notice a file has been modified. With the changes to
avoid startup delays it's possible to have compiles happen that quickly
in succession now.
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
The icon image creation is actually fairly expensive because the first
time you create a 32-bit image init_blend() is called, which is fairly
slow. Since only sub__icon makes use of these images (non-Windows
platforms and $Console:Only programs can't even use them) it's easy
enough to move the creation into sub__icon so the creation cost is
avoided on startup.
Fairly simple, the finished entry is free'd and then removed from the
list, but that order results in us accessing the entry's next member
after it has been free'd. Swapping the order of the operations fixes the
issue.
Fixes: #281
