Currently functions only have very limited optional argument support,
this expands it so that we can have more complex sets of optional
arguments for functions, such as multiple arguments where not all need
to be provided. This will be used in the future for some upcoming
functionality.
Note that this does not support any generic optional argument format,
the commas always have to be provided unless an optional argument is at
the end of the parameter list. Thus, if you have a format with two
optional arguments and you want to omit the second, then you need to call
it as 'foo(2, , 3)`, rather than `foo(2, 3)`. This is important for
avoiding ambiguous situations, and is how many SUBs currently function.
The two functions that violate that requirement are INSTR() and
_INSTRREV(), which use the format `[?],?,?` and allow omitting the comma
for the first argument. This format is simply handled as a special case.
Fixes: #303
If a timer expires while stopped, it should trigger when TIMER ON is
run. Instead, on QB64 it triggers randomly after the TIMER ON happens.
The basic issue is that `qbevent` needs to be set to trigger the timer,
but TIMER ON doesn't do that. The regular timer logic that does that
already set it when the timer expired while sleeping, so it won't set it
again. The simplest solution is to just alway set qbevent = 1 when TIMER
ON is done. It's slightly less efficent but doesn't hurt to set it even
when there are no timers that expired.
Fixes: #293
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
Timer's were not firing at the right time if they were started shortly
after the program started, instead they would fire at twice the interval
time (and then work correctly after that).
The issue was a mistaken assumption about `time_now`, with the idea that
if `last_time == 0` then `time_now` will be large enough such that the
interval check will pass. This is wrong because in most cases `time_now`
starts at zero at program start, so when `last_time == 0` it will take
one full interval of the timer before `time_now` is large enough for the
interval check to pass (at which point the timer is initialized and runs
normally).
This simply refactors the timer logic so that `last_time == 0` is
checked first, rather than if the interval has expired. This doesn't
change how the normal logic works, but ensures that the value of
`time_now` does not matter for initializing a timer.
Fixes: #273
- unused (commented) code
- no longer needed HTML tag handling (eliminated from Wiki pages)
- #toc/#top link filters removed (those links are supported now)
- designate the help page header as target for #toc/#top links (Return to Top, Return to Table of Contents in the Wiki)
- include bottom {{PageNavigation}} links
- implement <h4> headings (==== in the Wiki), used as letter anchors in the alphabetic index
- UTF-8 handling changed to signal missing/unknown chars
- old entity handling (see 1st commit) removed and replaced by a similar method as UTF-8 handling incl. signalling missing/unknown entities
- added dynamic warnings at the top of pages which are using missing/unknown entities or UTF-8
- wikipedia pages can be linked simply as Winkipedia:page instead of the full URL
- advantage: the new syntax can be used in internal links as well and will automatically expanded into external links when clicked
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.
