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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <alloca.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "error.h"
#include "charset.h"
static void
insert_char (struct linereader *lr, struct charset_t *cs, int bytes,
unsigned int value, const char *from, const char *to);
void
charset_new_char (struct linereader *lr, struct charset_t *cs, int bytes,
unsigned int value, const char *from, const char *to)
{
if (bytes < cs->mb_cur_min)
lr_error (lr, _("too few bytes in character encoding"));
else if (bytes > cs->mb_cur_max)
lr_error (lr, _("too many bytes in character encoding"));
else
insert_char (lr, cs, bytes, value, from, to);
}
void
charset_new_unicode (struct linereader *lr, struct charset_t *cs, int bytes,
unsigned int value, const char *from, const char *to)
{
/* For now: perhaps <Uxxxx> support will be removed again... */
insert_char (lr, cs, bytes, value, from, to);
}
unsigned int
charset_find_value (const struct charset_t *cs, const char *name, size_t len)
{
void *result;
if (find_entry ((hash_table *) &cs->char_table, name, len, &result) < 0)
return ILLEGAL_CHAR_VALUE;
return (unsigned int) ((unsigned long int) result);
}
static void
insert_char (struct linereader *lr, struct charset_t *cs, int bytes,
unsigned int value, const char *from, const char *to)
{
const char *cp;
char *buf;
int prefix_len, len1, len2;
unsigned int from_nr, to_nr, cnt;
if (to == NULL)
{
if (insert_entry (&cs->char_table, from, strlen (from),
(void *) (unsigned long int) value)
< 0)
lr_error (lr, _("duplicate character name `%s'"), from);
return;
}
/* We have a range: the names must have names with equal prefixes
and an equal number of digits, where the second number is greater
or equal than the first. */
len1 = strlen (from);
len2 = strlen (to);
if (len1 != len2)
{
illegal_range:
lr_error (lr, _("illegal names for character range"));
return;
}
cp = &from[len1 - 1];
while (isdigit (*cp) && cp >= from)
--cp;
prefix_len = (cp - from) + 1;
if (cp == &from[len1 - 1] || strncmp (from, to, prefix_len) != 0)
goto illegal_range;
from_nr = strtoul (&from[prefix_len], NULL, 10);
to_nr = strtoul (&to[prefix_len], NULL, 10);
if (from_nr > to_nr)
{
lr_error (lr, _("upper limit in range is not smaller then lower limit"));
return;
}
buf = alloca (len1 + 1);
memcpy (buf, from, prefix_len);
for (cnt = from_nr; cnt <= to_nr; ++cnt)
{
sprintf (&buf[prefix_len], "%0*d", len1 - prefix_len, cnt);
if (insert_entry (&cs->char_table, buf, len1,
(void *) (unsigned long int) (value + (cnt - from_nr)))
< 0)
lr_error (lr, _("duplicate character name `%s'"), buf);
}
}
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