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/* charspec.c: parse a character code or name.
Copyright (C) 1992, 2011 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "config.h"
#include "c-ctype.h"
#include "charspec.h"
#include "encoding.h"
charcode_type
xparse_charspec (string spec, encoding_info_type *enc)
{
int code;
/* It's an error to call this with SPEC == NULL or the empty string. */
assert (spec != NULL && *spec);
if (ISDIGIT (*spec))
code = xparse_charcode (spec);
else if (enc == NULL)
{
/* If ENC is null, and SPEC is longer than a single character, we
don't know what to do. */
if (spec[1] != 0)
FATAL1 ("%s: Unparseable character specification", spec);
else
code = *spec;
}
else
{
int code = encoding_number (*enc, spec);
/* If SPEC is not in the encoding, and it's one character long,
just use its value as a C integer. */
if (code == -1)
{
if (spec[1] == 0)
code = spec[0];
else
FATAL1 ("%s: Undefined character name", spec);
}
}
return (charcode_type) code;
}
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