CPROTO

NAME

SYNOPSIS

DESCRIPTION

By giving a command line option, cproto will also convert function definitions in the specified files from the old style to the ANSI C style. The original source files along with files specified by

#include "file"

directives appearing in the source code will be overwritten with the converted code. If no file names are given on the command line, then the program reads the source code from the standard input and outputs the converted source to the standard output.

If any comments appear in the parameter declarations for a function definition, such as in the example,

main (argc, argv)
int argc;       /* number of arguments */
char *argv[];   /* arguments */
{
}

then the converted function definition will have the form

int
main (
    int argc,       /* number of arguments */
    char *argv[]   /* arguments */
)
{
}

Otherwise, the converted function definition will look like

int
main (int argc, char *argv[])
{
}

Cproto can optionally convert function definitions from the ANSI style to the old style. In this mode, the program also converts function declarators and prototypes that appear outside function bodies. This is not a complete ANSI C to old C conversion. The program does not change anything within function bodies.  

OPTIONS

-e

Output the keyword extern in front of every generated prototype or declaration that has global scope.

-fn

Set the style of generated function prototypes where n is a number from 0 to 3. For example, consider the function definition

main (argc, argv)
int argc;
char *argv[];
{
}

If the value is 0, then no prototypes are generated. When set to 1, the output is:

int main(/*int argc, char *argv[]*/);

For a value of 2, the output has the form:

int main(int /*argc*/, char */*argv*/[]);

The default value is 3. It produces the full function prototype:

int main(int argc, char *argv[]);

-c

The parameter comments in the prototypes generated by the -f1 and -f2 options are omitted by default. Use this option to enable the output of these comments.

-m

Put a macro around the parameter list of every generated prototype. For example:

int main P_((int argc, char *argv[]));

-Mname

Set the name of the macro used to surround prototype parameter lists when option -m is selected. The default is "P_".

-d

Omit the definition of the prototype macro used by the -m option.

-p

Disable promotion of formal parameters in old style function definitions. By default, parameters of type char or short in old style function definitions are promoted to type int in the function prototype or converted ANSI C function definition. Parameters of type float get promoted to double as well.

-q

Do not output any error messages when the program cannot read the file specified in an #include directive.

-s

By default, cproto only generates declarations for functions and variables having global scope. This option will output static declarations as well.

-v

Also output declarations for variables defined in the source.

-a

Convert function definitions from the old style to the ANSI C style.

-t

Convert function definitions from the ANSI C style to the traditional style.

-b

Rewrite function definition heads to include both old style and new style declarations separated by a conditional compilation directive. For example, the program can generate this function definition:

#ifdef ANSI_FUNC

int
main (int argc, char *argv[])
#else

int
main (argc, argv)
int argc;
char *argv[]
#endif
{
}

-Bdirective

Set the conditional compilation directive to output at the beginning of function definitions generated by the -b option. The default is

#ifdef ANSI_FUNC

-Ptemplate
-Ftemplate
-Ctemplate

" int f ( a, b )"

but you may replace each space in this string with any number of whitespace characters. For example, the option

-F"int f(\n\ta,\n\tb\n\t)"

will produce

int main(
        int argc,
        char *argv[]
        )

-Dname[=value]

This option is passed through to the preprocessor and is used to define symbols for use with conditionals such as #ifdef.

-Uname

This option is passed through to the preprocessor and is used to remove any definitions of this symbol.

-Idirectory

This option is passed through to the preprocessor and is used to specify a directory to search for files that are referenced with #include.

-Ecpp

Pipe the input files through the specified C preprocessor command when generating prototypes. By default, the program uses /lib/cpp.

-E0

Do not run the C preprocessor.

-V

Print version information.

ENVIRONMENT

BUGS

The program does not pipe the source files through the C preprocessor when it is converting function definitions. Instead, it tries to handle preprocessor directives and macros itself and can be confused by tricky macro expansions. The conversion also discards some comments in the function definition head.

The -v option does not generate declarations for variables defined with the extern specifier. This doesn't strictly conform to the C language standard but this rule was implemented because include files commonly declare variables this way.

When the program encounters an error, it usually outputs the not very descriptive message "syntax error".

Options that take string arguments only interpret the following character escape sequences:

\n      newline
\t      tab

AUTHOR

Chin Huang
cthuang@zerosan.UUCP
chin.huang@canrem.com

SEE ALSO

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

ENVIRONMENT

BUGS

AUTHOR

SEE ALSO