godot/thirdparty/pcre2/src/pcre2_valid_utf.c

/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
     Original API code Copyright (c) 1997-2012 University of Cambridge
          New API code Copyright (c) 2016-2020 University of Cambridge

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*/


/* This module contains an internal function for validating UTF character
strings. This file is also #included by the pcre2test program, which uses
macros to change names from _pcre2_xxx to xxxx, thereby avoiding name clashes
with the library. In this case, PCRE2_PCRE2TEST is defined. */

#ifndef PCRE2_PCRE2TEST           /* We're compiling the library */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "pcre2_internal.h"
#endif /* PCRE2_PCRE2TEST */


#ifndef SUPPORT_UNICODE
/*************************************************
*  Dummy function when Unicode is not supported  *
*************************************************/

/* This function should never be called when Unicode is not supported. */

int
PRIV(valid_utf)(PCRE2_SPTR string, PCRE2_SIZE length, PCRE2_SIZE *erroroffset)
{
(void)string;
(void)length;
(void)erroroffset;
return 0;
}
#else  /* UTF is supported */



/*************************************************
*           Validate a UTF string                *
*************************************************/

/* This function is called (optionally) at the start of compile or match, to
check that a supposed UTF string is actually valid. The early check means
that subsequent code can assume it is dealing with a valid string. The check
can be turned off for maximum performance, but the consequences of supplying an
invalid string are then undefined.

Arguments:
  string       points to the string
  length       length of string
  errp         pointer to an error position offset variable

Returns:       == 0    if the string is a valid UTF string
               != 0    otherwise, setting the offset of the bad character
*/

int
PRIV(valid_utf)(PCRE2_SPTR string, PCRE2_SIZE length, PCRE2_SIZE *erroroffset)
{ … }
#endif  /* SUPPORT_UNICODE */

/* End of pcre2_valid_utf.c */