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/*
* CENA C++ Utilities
*
* by Stephane Chatty
*
* Copyright 1991, 1992
* Laboratoire de Recherche en Informatique (LRI)
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Regular expressions
*
* $Id$
* $CurLog$
*/
#include "RegExp.h"
/*?class CcuRegExp
The class \typ{CcuRegExp} was designed to encapsulate regular expression management,
implemented by \fun{re_comp} and \fun{re_exec}, or \fun{regcmp} and \fun{regex},
depending on the operating system. The standard usage consists in initializing
a \typ{CcuRegExp}, then compiling it, and finally match strings against it.
?*/
#ifdef DOC
/*?
Initialize a \typ{CcuRegExp} with expression \var{expr}. The string \var{epxr}
is {\em not} copied.
?*/
CcuRegExp :: CcuRegExp (const char* expr)
{
}
#endif
#ifdef REGCOMP
#include <regex.h>
#include <memory.h>
#include <malloc.h>
/*?
Compile a regular expression before using it. This function returns FALSE upon failure,
TRUE upon success.
?*/
bool
CcuRegExp :: Compile ()
{
struct regex_t tmp;
if (regcomp (&tmp, String, REG_NOSUB) == 0) {
Compiled = malloc (sizeof (struct regex_t));
memcpy (&Compiled, &tmp, sizeof (struct regex_t));
return TRUE;
} else
return FALSE;
}
/*?
Match a string against a regular expression. This function returns FALSE upon failure,
TRUE upon success.
?*/
bool
CcuRegExp :: Match (const char* s)
{
if (Compiled)
return regexec ((struct regex_t*) Compiled, s, 0, 0, 0) ? TRUE : FALSE;
else
return FALSE;
}
/*?nodoc?*/
CcuRegExp :: ~CcuRegExp ()
{
if (Compiled) {
regfree ((struct regex_t*) Compiled);
free (Compiled);
}
}
#endif
#ifdef RE_COMP
extern "C" {
char* re_comp (const char*);
int re_exec (const char*);
}
/* should be #include <regcmp.h>, but not available everywhere ... */
CcuRegExp* CcuRegExp::Compiled = 0;
/*?nodoc?*/
bool
CcuRegExp :: Compile ()
{
if (re_comp (String) != 0) {
Compiled = 0;
return FALSE;
} else {
Compiled = this;
return TRUE;
}
}
/*?nodoc?*/
bool
CcuRegExp :: Match (const char* s)
{
if (Compiled != this)
if (!Compile ())
return FALSE;
if (re_exec (s) == 1)
return TRUE;
else
return FALSE;
}
#endif /* RE_COMP */
#if !defined(REGCOMP) && !defined(RE_COMP)
#include <stdlib.h>
#include <malloc.h>
#ifdef __GNUG__
extern "C" {
char* regcmp (const char * ...);
char* regex (const char *, const char * ...);
}
#endif
/*?
Compile a regular expression before using it. This function returns FALSE upon failure,
TRUE upon success.
?*/
bool
CcuRegExp :: Compile ()
{
Compiled = regcmp (String, 0);
return Compiled ? TRUE : FALSE;
}
/*?
Match a string against a regular expression. This function returns FALSE upon failure,
TRUE upon success.
?*/
bool
CcuRegExp :: Match (const char* s)
{
if (Compiled)
return regex (Compiled, s) ? TRUE : FALSE;
else
return FALSE;
}
/*?nodoc?*/
CcuRegExp :: ~CcuRegExp ()
{
if (Compiled)
free (Compiled);
}
#endif /* !REGCOMP && !RE_COMP */
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