Hello list,
To stave off my boredom I've decided to take up creating a programming
language specifically for creating long repetitive text documents (like
repetitive resource definitions) where simple ctrl-c ctrl-v won't work, like
incrementing ID's, filenames within definitions, etc.
Basically, I have created, what I believe will be the sample script input file
(which I have attached) so that I have a goal to aim for.
What would be the best way to start by developing this tool? I have never done
any programming real down to the core, nothing with a lot of text parsing
before... How would I best attack creating an interpreter?
I plan on making it in C so that it is fairly portable sourcewise, unless I am
presented a better option of course :)
Thank you for your time,
Ryan
--
Thanks and best regards,
Ryan Rix
TamsPalm - The PalmOS Blog
Ditch MP3! Screw AAC! Banish WMA! OGG for life!
#!/usr/bin/macro
#First macro script.
# <-- comments :)
.define #this is where the macro definitions go, here
1:file.variable #Will represent a file in the cwd.
>pattern "*.bmp" #Not sure if this will be wildcard or regex...
2:repeat #These are for repetitive motions.
>text "\t\t\t\"${1}\" \\" #This is the text which will be repeated. Macros are expanded, see footnote 1.
>opts:resetvars #each time this is expanded, the macros in the text portion will be reset to their first expansion.
3:repeat
>text "ICON ${4}\nBEGIN\n\tBITMAP \"${1,noinc}\" BPP 16 DENSITY 2 TRANSPARENT 255 0 255\n\tBITMAP \"${1,stripext}_s\" BPP 16 TRANSPARENT 255 0 255\nEND" #See footnote 2 for info on options.
4:variable #These are any interger variable....
>initval:10000 #This is the value assigned at script load, or when a repeat is called with resetvars option.
>computation:${4}+10->${4} #This is the computation made BEFORE the variable is expanded. Only other variables are expanded within
define.
#This is just a standard PalmOS resource definition in PilRC format.
# pilrc.sf.net for info on pilrc incl. docs, and see
#
http://web.archive.org/web/20070816142916/www.estvo.com/developers/?specification for info on the skin specific format.
.text
VERSION "1.0"
// Author
STRING ID 100 "My Name"
// Text info
STRING ID 200 "My first iconpack"
// Creator mapping table
// 'addr - 'Address Book, icon resource ID - 10000, 10001
// 'calc' - Calculator, icon resource ID - 10010, 10011
// 'memo' - MemoPad, icon resource ID - 10020, 10021
HEX "crtb" ID 1000 "${1}" \
${2,1.NULL}
${3,1.NULL}
text.
#footnote 1: repeat texts
#basically, everytime a repeat is called, it will expand the macros. Everytime
#a file.variable macro is expanded it will get the next file found by find(1)
#and print it, with the options[2].
#footnote 2: options
#definitions can be passed various options either via the opts command in the
#definition, or from the source using the form ${def,option1,option2,option3,...}
# I have only defined a few options in this file: resetvars,noinc,stripext. resetvars
#is explained in comments, noinc says that the file should not be incremented
#(the index in the stored list returned by find(1)) or the variable's computation should
#not be called before expanding, or that the repeat should expand the last repeat that was
#done. For ease of use, this option would inherit to subsequent expansions. stripext tells
#file.variable that the file should be returned with the trailing . and all text after it to
# be dropped. "hello_world.bmp" become "hello_world".---------------------------------------------------
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