coccinelle: replace 0/1 with false/true in functions returning bool

/// Return statements in functions returning bool should use

/// true/false instead of 1/0.

//

// Confidence: High

// Options: --no-includes --include-headers

virtual patch

virtual report

virtual context

@r1 depends on patch@

identifier fn;

typedef bool;

symbol false;

symbol true;

@@

bool fn ( ... )

{

<...

return

(

- 0

+ false

|

- 1

+ true

)

  ;

...>

}

@r2 depends on report || context@

identifier fn;

position p;

@@

bool fn ( ... )

{

<...

return

(

* 0@p

|

* 1@p

)

  ;

...>

}

@script:python depends on report@

p << r2.p;

fn << r2.fn;

@@

msg = "WARNING: return of 0/1 in function '%s' with return type bool" % fn

coccilib.report.print_report(p[0], msg)