Two functions set the color of either the bottom or the top of the screen. If
the two colors are equal a solid colour draw is used. The color is supplied by
three floats specitying red green and blue elements.
Using nested switch statements made it easy to decide what to do in each
situation but this is rather verbose and causes -Wextra to complain (a lot).
Also added script_obj_is_[type] to help identify object easier and not repeat
code.
The example script now can show a spinfinity or a fade_in behaviour. This is
just to see how easy it is to implement current plugins. In the case of fade_in
it is around 23 lines of script code
Matches the use in C as "for (first, condition, last)" where first is executed
once, last is executed at the end of each iteration (even when continue is
executed) and condition is tested at the start of every cycle.
This should allow local and global to be assigned to a different vareable.
This is discouriged as it may cause asserts to fail, but may be useful to save
current state and continue the function at a later time.
Strings in C are often set to NULL to signify that they have not been set. This
should be carried through to the script system rather than failing at the
conversion.
The scripts can now attach themselves to the following callbacks: refresh,
boot_progress, root_mounted, keyboard_input, update_status, display_normal,
display_password and display_question.
Allows script functions to be executed without extracting the body of the
function and executing that. This makes implementing callbacks simpler and
enables passing of parameters.
The parses should now produce useful error messages of syntax errors in the
parsed files. This is not a 100% coverage but at least it now gives an error
with a line number rather than just an assert and a crash.
This is useful for scan and parse error reporting. The first column is zero but
this can be changed. Nedit and Emacs say zero, gedit says 1 and Vi says "0-1".
Treats "/*" and "*/" as block comment markers. Block comments may be nested.
There is a bug where if a comment or a string is not terminated before the end
of a file, the scanner deadlocks. Need to add a way or reporting scanner
errors to the parser.
These are currently hard coded to '//' and '#'. The code is there to return
them to the caller but currently they are thrown away.
Should add a skip_comments option and allow customisable markers.
Tokens now contain the number of white space characters since the last token.
This is useful in situations where white space between symbols changes the
meaning (e.g. a++ vs. a+ +).
An image rotate operation creates a new image with the same dimensions but with
the contents rotated by an angle around the centre of the image. Also added a
script object to float function to allow this.
Allows execution of unary operations: Pre/postfix inc/decrement, logical
negation and unary plus/minus.
The writebacks of increment/decrements happen during the execution of the
expression, unlike C where they are executed after the line if executed. This
is the case simply because it is simpler to execute this way.
There are links from the script state to parsed script data. Destroy the parsed
data after freeing the state.
This should be done properly with more ref counting or moving the freeme var to
the linking structure.
