TITLE ^

Status of WMLScript Translator

Introduction ^

The language WMLScript is a subset of ECMAScript (ie JavaScript). WMLScript defines also an bytecode interpreter (stack based), a binary format.

WMLScript is a part of the Wireless Application Protocol specifications.

The complete specification are available on http://www.openmobilealliance.org/ (formerly http://www.wapforum.org/)

Translator ^

The translator is in 3 files src/script.pir, src/opcode.pir (generated by build/translator.pl from src/translation.rules) and src/stdlibs.pir (generated by build/stdlibs.pl from src/wmlslib.cfg).

There are 4 applications :

The design of the Translator & Stack to Register Mapping comes from the Jonathan Worthington's work (see languages/dotnet/doc/contents.pod).

TODO ^

Find optimization (like Register or OptRegister) compatible with opcodes SCAND & SCOR. These 2 opcodes pop one value and push one or two values.

WMLScript PMC ^

languages/WMLScript/pmc/wmlsbytecode.pmc is a singleton PMC what holds a method load. This method is used to decode Bytecode File Format.

There are five types in WMLScript, each of them is implemented by a PMC.

WMLScript Ops ^

languages/WMLScript/ops/wmls.ops defines opcode with new signature.

WMLScript Standard Libraries ^

Some of these libraries are implemented in :

languages/WMLScript/runtime/wmlsstdlibs.pir gives an unique entry point and implements some helpers.

TODO ^

Some of these libraries are incomplete.

AUTHOR ^

Francois Perrad.


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