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PROGRAM:

NAME


nescc-ncg - extract constants from nesC files

SYNOPSIS


nescc-ncg [any nescc option] [tool-specific options]
[-o output-file] [-nescc=driver]
tool nesC-file filenames-or-constant-names...

DESCRIPTION


nescc-ncg is a tool to extract constants from nesC files for use with other applications.
It is typically used in conjunction with nescc-mig (which generates code to process nesC
messages) to extract constants that are used in particular messages (e.g., constants
representing various commands).

The tool argument specifies what tool should be generated, the nesC-file specifies a nesC
file which uses the constants you want to extract. If your constants are all in a single
.h file that does not depend on any other files, then you can specify the .h file directly
as the msg-format-file. Note that if some of your constants are defined with unique(...)
or uniqueCount(...), you must specify your whole application as the nesC-file, or you will
not get the correct constant values.

Each filenames-or-constant-names is either a constant name (if it consists only of
letters, numbers and _) or a filename. In the former case, the specified constant will be
extracted, in the latter case all constants from the specified C file will be extracted.
Only constants declared in C files will be found by nescc-ncg.

The current tools are java, python and C, which generate java, python and C code that
contains the values of the requested constants.

OPTIONS


You can pass any nescc option, as well as

-o output-file
Specify the file in which to output the generated code.

-nescc=driver
Use driver instead of nescc to extract constants. For example, if you specify
-nescc=ncc, you can use nescc-ncg to extract constants from TinyOS applications
(which are normally compiled with ncc).

tool-specific options
See below.

JAVA TOOL


This tool generates a java class with the values of the requested constants. These
constants will be public final static and have a type chosen from byte, short, char, int,
long (the chosen type will be the first one in this list that can hold the constants value
- this reduces the need for casts).

The java tool accepts the following options:

-java-classname=full-class-name
This option is required and specifies the package and name of the generated class.
If the full-class-name has no '.', then no package directive is included in the
output.

-java-extends=class-name
Specify the class the generated class will extend. The default is Object.

PYTHON TOOL


This tool generates a Python class with the values of the requested constants. These
constants will be class (rather than instance) variables.

The Python tool accepts the following options:

-python-classname=full-class-name
This option is required and specifies the name of the generated class.

-python-extends=class-name
Specify the class the generated class will extend. The default is is to not
inherit.

C TOOL


This tool generates a C header file with the values of the requested constants (defined as
enum constants).

The C tool accepts the following option:

-c-prefix=prefix
This option specifies a prefix to attach to the generated constants.

ERRORS


nescc-ncg reports an error if ncc cannot compile nesC-file.

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