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/*

 * Copyright (c) 2002-2006 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

#include "config.h"

#include "c_types.h"

#include "exp_ops.h"

#include "str_ops.h"

#include "error.h"

#include "extra.h"

#include "catalog.h"

#include "option.h"

#include "hash.h"

#include "lex.h"

#include "literal.h"

#include "syntax.h"

#include "ustring.h"

#include "xalloc.h"

/*

    ERROR CATALOGUE

    The error catalogue definition is automatically generated.  It consists

    of an array of ERR_DATA structures, ERR_CATALOG.

*/

#include "errors3.h"

/*

    NUMBER OF ERRORS

    This value gives the number of errors in the error catalogue.

*/

#define CATALOG_SIZE	array_size(ERR_CATALOG)

unsigned catalog_size = (unsigned)CATALOG_SIZE;

/*

    ERROR NAME HASH TABLE

    This hash table is used to hold the names of the various errors in

    the error catalogue.

*/

typedef struct err_hash_tag {

	int number;

	ERR_DATA *entry;

	struct err_hash_tag *next;

} ERR_HASH;

#define HASH_ERROR	128

static ERR_HASH *error_hash[HASH_ERROR + 1];

static ERR_HASH *all_error_hash = NULL;

/*

    INITIALISE THE ERROR NAME HASH TABLE

    This routine initialises the error hash table.

*/

static void

init_err_hash(void)

{

	int i;

	ERR_DATA *cat = ERR_CATALOG;

	ERR_HASH *err = xmalloc_nof(ERR_HASH, CATALOG_SIZE);

	all_error_hash = err;

	for (i = 0; i <= HASH_ERROR; i++) {

		error_hash[i] = NULL;

	}

	for (i = 0; i < CATALOG_SIZE; i++) {

		unsigned long h;

		CONST char *s = cat->name;

		if (s) {

			h = hash(ustrlit(s));

			h %= HASH_ERROR;

		} else {

			h = HASH_ERROR;

		}

		err->number = i;

		err->entry = cat;

		err->next = error_hash[h];

		error_hash[h] = err;

		cat++;

		err++;

	}

	return;

}

/*

    FIND AN ERROR NUMBER

    This routine finds the error number corresponding to the string literal

    expression s.  n gives a likely value to try first.  It returns -1 if

    s is not the name of a known error.

*/

int

find_error_no(STRING s, int n)

{

	unsigned kind = DEREF_unsigned(str_simple_kind(s));

	if (kind == STRING_NONE) {

		ERR_HASH *err;

		unsigned long h;

		string text = DEREF_string(str_simple_text(s));

		ulong len = DEREF_ulong(str_simple_len(s));

		if (n >= 0 && n < CATALOG_SIZE) {

			string nm = ustrlit(ERR_CATALOG[n].name);

			if (nm && ustreq(text, nm)) {

				if (len == (ulong)ustrlen(nm)) {

					return (n);

				}

			}

		}

		if (all_error_hash == NULL) {

			init_err_hash();

		}

		h = hash(text);

		h %= HASH_ERROR;

		for (err = error_hash[h]; err != NULL; err = err->next) {

			string nm = ustrlit(err->entry->name);

			if (nm && ustreq(text, nm)) {

				if (len == (ulong)ustrlen(nm)) {

					return (err->number);

				}

			}

		}

	}

	return (-1);

}

/*

    SET AN ERROR SEVERITY LEVEL

    This routine sets the severity level of error number n to the error

    severity corresponding to the option number opt.

*/

void

set_error_sev(int n, int opt)

{

	if (n >= 0 && n < CATALOG_SIZE) {

		ERR_CATALOG[n].usage = opt;

	}

	return;

}

/*

    LOOK UP A LANGUAGE DEPENDENT TERM

    Certain technical terms vary slightly between C and C++.  This routine

    looks up the term corresponding to the lexical token number t in the

    current language.  The default is the normal lexical token name.

*/

string

find_vocab(int t)

{

	CONST char *s = token_names[t];

#if LANGUAGE_C

	switch (t) {

	case lex_class:

		s = "struct/union"; break;

	}

#endif

	return (ustrlit(s));

}

/*

    INITIALISE THE ERROR CATALOGUE

    This routine initialises the error catalogue.

*/

void

init_catalog(void)

{

	ASSERT(OPT_error == 0);

	return;

}

/*

    TERMINATE THE ERROR CATALOGUE

    This routine terminates the error catalogue.

*/

void

term_catalog(void)

{

	xfree_nof(all_error_hash);

	all_error_hash = NULL;

	return;

}