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/*

    		 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

    PROTO_Z ()

{

    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

    PROTO_N ( ( s, n ) )

    PROTO_T ( STRING s X 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

    PROTO_N ( ( n, opt ) )

    PROTO_T ( int n X 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

    PROTO_N ( ( t ) )

    PROTO_T ( 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

    PROTO_Z ()

{

    ASSERT ( OPT_error == 0 ) ;

    return ;

}

/*

    TERMINATE THE ERROR CATALOGUE

    This routine terminates the error catalogue.

*/

void term_catalog

    PROTO_Z ()

{

    xfree_nof ( all_error_hash ) ;

    all_error_hash = NULL ;

    return ;

}