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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 "tdf.h"

#include "cons_ops.h"

#include "info_ops.h"

#include "link_ops.h"

#include "par_ops.h"

#include "sort_ops.h"

#include "error.h"

#include "input.h"

#include "xalloc.h"

/*

    ARRAY OF KNOWN SORT NAMES

    This table gives the mapping from sort names to sort codes.  Sorts

    not in this list, or with a sort code of zero, have sort codes

    automatically generated for them.

*/

static struct {

    char *name ;

    int code ;

} sort_names [] = {

    /* Built-in sorts */

    { "tdfint", 'i' },

    { "tdfstring", '$' },

    { "tdfident", '=' },

    { "tdfbool", 'j' },

    { "bitstream", '@' },

    { "bytestream", '#' },

    /* Basic sorts */

    { "access", 'u' },

    { "alignment", 'a' },

    { "al_tag", 'A' },

    { "bitfield_variety", 'B' },

    { "bool", 'b' },

    { "callees", 'q' },

    { "error_code", 'c' },

    { "error_treatment", 'e' },

    { "exp", 'x' },

    { "floating_variety", 'f' },

    { "label", 'l' },

    { "nat", 'n' },

    { "ntest", 'N' },

    { "procprops", 'P' },

    { "rounding_mode", 'r' },

    { "shape", 'S' },

    { "signed_nat", 's' },

    { "string", 'X' },

    { "tag", 't' },

    { "token", 'T' },

    { "transfer_mode", 'm' },

    { "variety", 'v' },

    /* Unit sorts */

    { "al_tagdef", 0 },

    { "diag_tagdef", 0 },

    { "external", 0 },

    { "sortname", '~' },

    { "tagdec", 0 },

    { "tagdef", 0 },

    { "tokdec", 0 },

    { "tokdef", 0 },

    /* Diagnostic and linkage sorts */

    { "diag_descriptor", 'D' },

    { "diag_tag", 'I' },

    { "diag_tq", 'g' },

    { "diag_type", 'd' },

    { "filename", 'Q' },

    { "linkinfo", 'L' },

    { "sourcemark", 'M' },

    { "version", 'V' },

    /* New diagnostic sorts */

    { "dg", 'G' },

    { "dg_accessibility", 'o' },

    { "dg_append", 'H' },

    { "dg_bound", 'w' },

    { "dg_classmem", 'z' },

    { "dg_class_base", 'y' },

    { "dg_compilation", 'C' },

    { "dg_dim", 'O' },

    { "dg_discrim", 'K' },

    { "dg_enum", 'E' },

    { "dg_field", 'R' },

    { "dg_filename", 'U' },

    { "dg_idname", 'Y' },

    { "dg_macro", 'Z' },

    { "dg_name", 'h' },

    { "dg_namelist", 'k' },

    { "dg_param", 'p' },

    { "dg_param_mode", 0 },

    { "dg_qualifier", 0 },

    { "dg_sourcepos", 'W' },

    { "dg_tag", 'J' },

    { "dg_type", 0 },

    { "dg_variant", 0 },

    { "dg_varpart", 0 },

    { "dg_virtuality", 0 }

} ;

#define NO_BUILTIN_SORTS	6

#define NO_SORTS		array_size ( sort_names )

/*

    LIST OF ALL SORTS

    A list of all sorts (in alphabetical order) is maintained.

*/

static LIST ( SORT ) all_sorts = NULL_list ( SORT ) ;

/*

    DEFINE A SORT

    This routine defines the sort s to be info.

*/

static void define_sort

    PROTO_N ( ( s, info, code ) )

    PROTO_T ( SORT s X SORT_INFO info X int code )

{

    static int next_code = 1 ;

    SORT_INFO old = DEREF_info ( sort_info ( s ) ) ;

    if ( !IS_NULL_info ( old ) ) {

	string nm = DEREF_string ( sort_name ( s ) ) ;

	error ( ERROR_SERIOUS, "Sort '%s' already defined", nm ) ;

    }

    COPY_info ( sort_info ( s ), info ) ;

    if ( code == 0 ) code = next_code++ ;

    COPY_int ( sort_code ( s ), code ) ;

    return ;

}

/*

    FIND A SORT

    This routine looks up a sort named nm, creating it if it does not

    already exist if create is true.

*/

SORT find_sort

    PROTO_N ( ( nm, create ) )

    PROTO_T ( string nm X int create )

{

    SORT s ;

    string cnm ;

    SORT_INFO info = NULL_info ;

    LIST ( SORT ) p = all_sorts ;

    LIST ( SORT ) q = NULL_list ( SORT ) ;

    while ( !IS_NULL_list ( p ) ) {

	int cmp ;

	string n ;

	s = DEREF_sort ( HEAD_list ( p ) ) ;

	n = DEREF_string ( sort_name ( s ) ) ;

	cmp = strcmp ( n, nm ) ;

	if ( cmp == 0 ) return ( s ) ;

	if ( cmp > 0 ) break ;

	q = p ;

	p = TAIL_list ( p ) ;

    }

    cnm = to_capitals ( nm ) ;

    MAKE_sort_basic ( nm, cnm, NULL, NULL, 0, 0, 0, 0, info, s ) ;

    if ( !create ) {

	error ( ERROR_SERIOUS, "Sort '%s' not defined", nm ) ;

	MAKE_info_builtin ( nm, info ) ;

	define_sort ( s, info, 0 ) ;

    }

    CONS_sort ( s, p, p ) ;

    if ( IS_NULL_list ( q ) ) {

	all_sorts = p ;

    } else {

	COPY_list ( PTR_TAIL_list ( q ), p ) ;

    }

    return ( s ) ;

}

/*

    MARK A CONSTRUCT AS USED

    This routine marks the parameter sorts of the constructs c with the

    value m.

*/

void mark_construct

    PROTO_N ( ( c, m ) )

    PROTO_T ( CONSTRUCT c X int m )

{

    if ( !IS_NULL_cons ( c ) ) {

	LIST ( PARAMETER ) p = DEREF_list ( cons_pars ( c ) ) ;

	while ( !IS_NULL_list ( p ) ) {

	    PARAMETER a = DEREF_par ( HEAD_list ( p ) ) ;

	    SORT s = DEREF_sort ( par_type ( a ) ) ;

	    mark_sort ( s, m ) ;

	    p = TAIL_list ( p ) ;

	}

    }

    return ;

}

/*

    MARK A SORT AS USED

    This routine marks the sort s and all its constructs with the value m.

*/

void mark_sort

    PROTO_N ( ( s, m ) )

    PROTO_T ( SORT s X int m )

{

    int mark = DEREF_int ( sort_mark ( s ) ) ;

    if ( mark != m ) {

	SORT_INFO info = DEREF_info ( sort_info ( s ) ) ;

	COPY_int ( sort_mark ( s ), m ) ;

	if ( !IS_NULL_info ( info ) ) {

	    switch ( TAG_info ( info ) ) {

		case info_basic_tag : {

		    LIST ( CONSTRUCT ) p ;

		    p = DEREF_list ( info_basic_cons ( info ) ) ;

		    while ( !IS_NULL_list ( p ) ) {

			CONSTRUCT c = DEREF_cons ( HEAD_list ( p ) ) ;

			mark_construct ( c, m ) ;

			p = TAIL_list ( p ) ;

		    }

		    break ;

		}

		case info_dummy_tag : {

		    CONSTRUCT c = DEREF_cons ( info_dummy_cons ( info ) ) ;

		    mark_construct ( c, m ) ;

		    break ;

		}

		case info_clist_tag :

		case info_slist_tag :

		case info_option_tag : {

		    SORT p = DEREF_sort ( info_clist_etc_arg ( info ) ) ;

		    mark_sort ( p, m ) ;

		    break ;

		}

	    }

	}

    }

    return ;

}

/*

    MARK ALL SORTS AS USED

    This routine marks all sorts with the value m.

*/

void mark_all_sorts

    PROTO_N ( ( m ) )

    PROTO_T ( int m )

{

    LIST ( SORT ) p = all_sorts ;

    while ( !IS_NULL_list ( p ) ) {

	SORT s = DEREF_sort ( HEAD_list ( p ) ) ;

	COPY_int ( sort_mark ( s ), m ) ;

	p = TAIL_list ( p ) ;

    }

    return ;

}

/*

    DOES A STRING HAVE A GIVEN ENDING?

    This routine checks whether the string s ends in the string e.  If so

    it returns a copy of s with this ending removed.  Otherwise it returns

    the null string.

*/

string ends_in

    PROTO_N ( ( s, e ) )

    PROTO_T ( string s X string e )

{

    unsigned n = ( unsigned ) strlen ( s ) ;

    unsigned m = ( unsigned ) strlen ( e ) ;

    if ( n >= m ) {

	unsigned d = n - m ;

	if ( streq ( s + d, e ) ) {

	    s = xstrcpy ( s ) ;

	    s [d] = 0 ;

	    return ( s ) ;

	}

    }

    return ( NULL ) ;

}

/*

    CONVERT A STRING TO CAPITALS

    This routine returns a copy of the string s with all the lower case

    letters converted to upper case.

*/

string to_capitals

    PROTO_N ( ( s ) )

    PROTO_T ( string s )

{

    char c ;

    string t ;

    s = xstrcpy ( s ) ;

    t = s ;

    while ( c = *t, c != 0 ) {

	if ( c >= 'a' && c <= 'z' ) {

	    *t = ( char ) ( 'A' + ( c - 'a' ) ) ;

	}

	t++ ;

    }

    return ( s ) ;

}

/*

    DEFINE A BASIC SORT

    This routine defines the basic sort s to have b bits (extended if e

    is true) and constructs p.

*/

void basic_sort

    PROTO_N ( ( s, b, e, p ) )

    PROTO_T ( SORT s X unsigned b X unsigned e X LIST ( CONSTRUCT ) p )

{

    int code = 0 ;

    SORT_INFO info ;

    string n = DEREF_string ( sort_name ( s ) ) ;

    if ( b == 0 && e == 0 && LENGTH_list ( p ) == 1 ) {

	/* Dummy sort */

	CONSTRUCT c = DEREF_cons ( HEAD_list ( p ) ) ;

	MAKE_info_dummy ( n, c, info ) ;

	code = 'F' ;

    } else {

	int i ;

	for ( i = NO_BUILTIN_SORTS ; i < NO_SORTS ; i++ ) {

	    if ( streq ( n, sort_names [i].name ) ) {

		code = sort_names [i].code ;

		break ;

	    }

	}

	MAKE_info_basic ( n, b, e, 0, p, NULL_cons, info ) ;

    }

    define_sort ( s, info, code ) ;

    return ;

}

/*

    CREATE A CONSTRUCT

    This routine creates a construct named nm with result sort s, parameter

    sorts p and encoding e.

*/

CONSTRUCT make_construct

    PROTO_N ( ( nm, e, s, p ) )

    PROTO_T ( string nm X unsigned e X SORT s X LIST ( PARAMETER ) p )

{

    CONSTRUCT c ;

    unsigned kind = KIND_simple ;

    if ( ends_in ( nm, "_apply_token" ) ) kind = KIND_token ;

    if ( ends_in ( nm, "_cond" ) ) kind = KIND_cond ;

    MAKE_cons_basic ( nm, e, s, p, kind, c ) ;

    return ( c ) ;

}

/*

    DEFINE A COMPOUND SORT

    This routine defines the compound sort s with standard suffix suff

    and sort type tag.

*/

void compound_sort

    PROTO_N ( ( s, suff, tag, code ) )

    PROTO_T ( SORT s X string suff X unsigned tag X int code )

{

    string nm = DEREF_string ( sort_name ( s ) ) ;

    string snm = ends_in ( nm, suff ) ;

    if ( snm ) {

	SORT_INFO info ;

	SORT t = find_sort ( snm, 1 ) ;

	MAKE_info_clist_etc ( tag, nm, t, info ) ;

	define_sort ( s, info, code ) ;

    } else {

	error ( ERROR_SERIOUS, "Sort '%s' doesn't end in '%s'", nm, suff ) ;

    }

    return ;

}

/*

    FIND A CONSTRUCT

    This routine searches for a construct named c in the sort s.

*/

CONSTRUCT find_construct

    PROTO_N ( ( s, c ) )

    PROTO_T ( SORT s X string c )

{

    SORT_INFO info = DEREF_info ( sort_info ( s ) ) ;

    if ( !IS_NULL_info ( info ) && IS_info_basic ( info ) ) {

	LIST ( CONSTRUCT ) p = DEREF_list ( info_basic_cons ( info ) ) ;

	while ( !IS_NULL_list ( p ) ) {

	    CONSTRUCT a = DEREF_cons ( HEAD_list ( p ) ) ;

	    string b = DEREF_string ( cons_name ( a ) ) ;

	    if ( streq ( b, c ) ) return ( a ) ;

	    p = TAIL_list ( p ) ;

	}

    }

    return ( NULL_cons ) ;

}

/*

    SET A CONSTRUCT KIND

    This routine sets the kind of the construct c of sort s to be kind.

*/

void set_special

    PROTO_N ( ( s, c, kind ) )

    PROTO_T ( SORT s X string c X unsigned kind )

{

    CONSTRUCT a = find_construct ( s, c ) ;

    if ( !IS_NULL_cons ( a ) ) {

	COPY_unsigned ( cons_kind ( a ), kind ) ;

    } else {

	string nm = DEREF_string ( sort_name ( s ) ) ;

	error ( ERROR_SERIOUS, "Can't find construct '%s' for sort '%s'",

		c, nm ) ;

    }

    return ;

}

/*

    FIND A CONSTRUCT OF A GIVEN KIND

    This routine searches for a construct of the sort s of the given kind.

*/

CONSTRUCT get_special

    PROTO_N ( ( s, kind ) )

    PROTO_T ( SORT s X unsigned kind )

{

    SORT_INFO info = DEREF_info ( sort_info ( s ) ) ;

    if ( !IS_NULL_info ( info ) && IS_info_basic ( info ) ) {

	LIST ( CONSTRUCT ) p = DEREF_list ( info_basic_cons ( info ) ) ;

	while ( !IS_NULL_list ( p ) ) {

	    CONSTRUCT a = DEREF_cons ( HEAD_list ( p ) ) ;

	    unsigned b = DEREF_unsigned ( cons_kind ( a ) ) ;

	    if ( b == kind ) return ( a ) ;

	    p = TAIL_list ( p ) ;

	}

    }

    return ( NULL_cons ) ;

}

/*

    DEFINE THE BUILT-IN SORTS

    This routine defines the built-in sorts.

*/

void builtin_sorts

    PROTO_Z ()

{

    int i ;

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

	SORT_INFO info ;

	char *nm = sort_names [i].name ;

	SORT s = find_sort ( nm, 1 ) ;

	MAKE_info_builtin ( nm, info ) ;

	define_sort ( s, info, sort_names [i].code ) ;

    }

    return ;

}

/*

    CHECK THE LIST OF ALL SORTS

    This routine checks the list of all sorts for undefined sorts,

    returning the reordered list.

*/

LIST ( SORT ) check_sorts

    PROTO_Z ()

{

    LIST ( SORT ) p = all_sorts ;

    while ( !IS_NULL_list ( p ) ) {

	SORT s = DEREF_sort ( HEAD_list ( p ) ) ;

	SORT_INFO info = DEREF_info ( sort_info ( s ) ) ;

	if ( IS_NULL_info ( info ) ) {

	    string nm = DEREF_string ( sort_name ( s ) ) ;

	    error ( ERROR_SERIOUS, "Sort '%s' not defined", nm ) ;

	    MAKE_info_builtin ( nm, info ) ;

	    define_sort ( s, info, 0 ) ;

	}

	if ( IS_info_basic ( info ) ) {

	    unsigned m = 0 ;

	    LIST ( CONSTRUCT ) q = DEREF_list ( info_basic_cons ( info ) ) ;

	    while ( !IS_NULL_list ( q ) ) {

		CONSTRUCT a = DEREF_cons ( HEAD_list ( q ) ) ;

		unsigned n = DEREF_unsigned ( cons_encode ( a ) ) ;

		if ( n > m ) m = n ;

		q = TAIL_list ( q ) ;

	    }

	    COPY_unsigned ( info_basic_max ( info ), m ) ;

	}

	p = TAIL_list ( p ) ;

    }

    return ( all_sorts ) ;

}

/*

    FIND FOREIGN SORTS

    This routine finds all the foreign sorts.

*/

LIST ( LINKAGE ) foreign_sorts

    PROTO_Z ()

{

    unsigned e = 0 ;

    LIST ( SORT ) p = all_sorts ;

    LIST ( LINKAGE ) q = NULL_list ( LINKAGE ) ;

    LIST ( PARAMETER ) pars = NULL_list ( PARAMETER ) ;

    SORT t = find_sort ( "sortname", 0 ) ;

    SORT_INFO info = DEREF_info ( sort_info ( t ) ) ;

    if ( IS_info_basic ( info ) ) {

	e = DEREF_unsigned ( info_basic_max ( info ) ) ;

    }

    while ( !IS_NULL_list ( p ) ) {

	SORT s = DEREF_sort ( HEAD_list ( p ) ) ;

	info = DEREF_info ( sort_info ( s ) ) ;

	if ( IS_info_basic ( info ) ) {

	    string nm = DEREF_string ( sort_name ( s ) ) ;

	    CONSTRUCT c = get_special ( s, KIND_token ) ;

	    if ( !IS_NULL_cons ( c ) ) {

		/* Sort can be tokenised */

		string snm = nm ;

		if ( streq ( nm, "alignment" ) ) {

		    snm = "alignment_sort" ;

		}

		c = find_construct ( t, snm ) ;

		if ( IS_NULL_cons ( c ) ) {

		    /* Doesn't have a sort name */

		    LINKAGE a ;

		    if ( streq ( nm, "diag_type" ) ) {

			snm = "diag_type" ;

		    } else if ( streq ( nm, "filename" ) ) {

			snm = "~diag_file" ;

		    } else {

			snm = to_capitals ( nm ) ;

		    }

		    MAKE_cons_basic ( snm, ++e, t, pars, KIND_foreign, c ) ;

		    MAKE_link_basic ( snm, s, a ) ;

		    CONS_link ( a, q, q ) ;

		}

	    } else {

		MAKE_cons_basic ( nm, ++e, t, pars, KIND_dummy, c ) ;

	    }

	    COPY_cons ( info_basic_sortname ( info ), c ) ;

	}

	p = TAIL_list ( p ) ;

    }

    q = REVERSE_list ( q ) ;

    return ( q ) ;

}

/*

    FIND A PARAMETER

    This routine returns the nth parameter of the construct c.

*/

PARAMETER find_param

    PROTO_N ( ( c, n ) )

    PROTO_T ( CONSTRUCT c X unsigned n )

{

    LIST ( PARAMETER ) p = DEREF_list ( cons_pars ( c ) ) ;

    while ( n ) {

	if ( IS_NULL_list ( p ) ) {

	    string nm = DEREF_string ( cons_name ( c ) ) ;

	    error ( ERROR_SERIOUS, "Bad parameter number for '%s'", nm ) ;

	    return ( NULL_par ) ;

	}

	p = TAIL_list ( p ) ;

	n-- ;

    }

    return ( DEREF_par ( HEAD_list ( p ) ) ) ;

}