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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 <signal.h>

#include "release.h"

#include "object.h"

#include "hash.h"

#include "index.h"

#include "lex.h"

#include "makefile.h"

#include "name.h"

#include "syntax.h"

#include "type.h"

#include "print.h"

#include "utility.h"

/*

    SIGNAL HANDLER

    This routine handles caught signals.

*/

static void handler

    PROTO_N ( ( sig ) )

    PROTO_T ( int sig )

{

    char *s ;

    hash_elem *e ;

    IGNORE signal ( SIGINT, SIG_IGN ) ;

    switch ( sig ) {

	case SIGINT : s = "interrupt" ; break ;

	case SIGSEGV : s = "segmentation violation" ; break ;

	case SIGTERM : s = "termination signal" ; break ;

	default : s = "unknown signal" ; break ;

    }

    error ( ERR_SERIOUS, "Caught %s", s ) ;

    e = sort_hash ( files ) ;

    while ( e ) {

	object *p = e->obj ;

	FILE *f = p->u.u_file ;

	if ( f ) {

	    char *nm = p->name ;

	    if ( verbose ) error ( ERR_INFO, "Removing %s ...", nm ) ;

	    IGNORE fclose ( f ) ;

	    IGNORE remove ( nm ) ;

	}

	e = e->next ;

    }

    exit ( exit_status ) ;

}

/*

    SEPARATE COMPILATION ROUTINE

    This routine performs the separate compilation of the set object p.

*/

static void separate

    PROTO_N ( ( p ) )

    PROTO_T ( object *p )

{

    info *i = p->u.u_info ;

    static char *exec = null ;

    if ( i->subset || i->file == null ) return ;

    if ( exec == null ) exec = buffer + strlen ( buffer ) ;

    IGNORE sprintf ( exec, "%s %s", i->api, i->file ) ;

    if ( verbose > 1 ) error ( ERR_INFO, "Executing '%s' ...", buffer ) ;

    if ( system ( buffer ) ) {

	error ( ERR_SERIOUS, "Separate compilation of %s failed", p->name ) ;

    }

    return ;

}

/*

    MARK A SET AS IMPLEMENTED

    This routine recursively marks all implemented subsets of p.

*/

static void implement

    PROTO_N ( ( p, depth ) )

    PROTO_T ( object *p X int depth )

{

    object *q ;

    info *i = p->u.u_info ;

    if ( i == null || i->implemented >= depth ) return ;

    i->implemented = depth ;

    for ( q = i->elements ; q != null ; q = q->next ) {

	if ( q->objtype == OBJ_IMPLEMENT ) {

	    implement ( q->u.u_obj, depth + 1 ) ;

	}

    }

    return ;

}

/*

    MAIN ROUTINE

    This is the main routine which interprets the command-line options

    and calls the appropriate routines.

*/

int main

    PROTO_N ( ( argc, argv ) )

    PROTO_T ( int argc X char **argv )

{

    int a ;

    char *env ;

    char *dir = "." ;

    char *api = null ;

    char *file = null ;

    char *subset = null ;

    object *commands = null ;

    FILE *preproc_file = null ;

    int show_index = 0 ;

    boolean check_only = 0 ;

    boolean preproc_input = 0 ;

    boolean separate_files = 0 ;

    /* Initialisation */

    line_no = 1 ;

    filename = "built-in definitions" ;

    init_hash () ;

    init_keywords () ;

    init_types () ;

    filename = "command line" ;

    IGNORE signal ( SIGINT, handler ) ;

    IGNORE signal ( SIGSEGV, handler ) ;

    IGNORE signal ( SIGTERM, handler ) ;

    /* Read system variables */

    env = getenv ( INPUT_ENV ) ;

    if ( env ) input_dir = string_copy ( env ) ;

    env = getenv ( OUTPUT_ENV ) ;

    if ( env ) {

	output_incl_dir = string_printf ( "%s/include", env ) ;

	output_incl_len = ( int ) strlen ( output_incl_dir ) + 1 ;

	output_src_dir = string_printf ( "%s/src", env ) ;

	output_src_len = ( int ) strlen ( output_src_dir ) + 1 ;

    }

    env = getenv ( INCLUDE_ENV ) ;

    if ( env ) {

	output_incl_dir = string_copy ( env ) ;

	output_incl_len = ( int ) strlen ( output_incl_dir ) + 1 ;

    }

    env = getenv ( SRC_ENV ) ;

    if ( env ) {

	output_src_dir = string_copy ( env ) ;

	output_src_len = ( int ) strlen ( output_src_dir ) + 1 ;

    }

    env = getenv ( COPYRIGHT_ENV ) ;

    if ( env ) copyright = string_copy ( env ) ;

    /* Process options */

    for ( a = 1 ; a < argc ; a++ ) {

	char *arg = argv [a] ;

	line_no = a ;

	if ( arg [0] == '-' ) {

	    if ( arg [1] == 'I' ) {

		dir = string_printf ( "%s:%s", dir, arg + 2 ) ;

	    } else if ( arg [1] == 'O' ) {

		output_incl_dir = arg + 2 ;

		output_incl_len = ( int ) strlen ( arg + 2 ) + 1 ;

	    } else if ( arg [1] == 'S' ) {

		output_src_dir = arg + 2 ;

		output_src_len = ( int ) strlen ( arg + 2 ) + 1 ;

	    } else if ( arg [1] == 'C' ) {

		copyright = arg + 2 ;

	    } else {

		char *s ;

		for ( s = arg + 1 ; *s ; s++ ) {

		    switch ( *s ) {

			case 'a' : separate_files = 0 ; break ;

			case 'c' : check_only = 1 ; break ;

			case 'd' : restrict_depth = 0 ; break ;

			case 'e' : preproc_file = stdout ; break ;

			case 'f' : force_output = 1 ; break ;

			case 'i' : show_index = 1 ; break ;

			case 'l' : local_input = 1 ; break ;

			case 'm' : show_index = 2 ; break ;

			case 'n' : progdate = date_stamp ( argv [0] ) ; break ;

			case 'p' : preproc_input = 1 ; break ;

			case 'r' : restrict_use = 1 ; break ;

			case 's' : separate_files = 1 ; break ;

			case 't' : allow_long_long = 1 ; break ;

			case 'u' : unique_names = 1 ; break ;

			case 'v' : verbose++ ; break ;

			case 'w' : warnings = 0 ; break ;

			case 'V' : {

			    error ( ERR_INFO, "Version: %s (release %s)",

				    progvers, RELEASE ) ;

			    break ;

			}

			default : {

			    error ( ERR_WARNING, "Unknown option, -%c", *s ) ;

			    break ;

			}

		    }

		}

	    }

	} else {

	    if ( api == null ) {

		api = arg ;

	    } else if ( file == null ) {

		file = arg ;

	    } else if ( subset == null ) {

		subset = arg ;

	    } else {

		error ( ERR_WARNING, "Too many arguments" ) ;

	    }

	}

    }

    if ( local_input ) {

	if ( subset ) error ( ERR_WARNING, "Too many arguments" ) ;

	subset = file ;

	file = api ;

	api = LOCAL_API ;

    }

    if ( api == null ) error ( ERR_FATAL, "Not enough arguments" ) ;

    input_dir = string_printf ( "%s:%s", dir, input_dir ) ;

    if ( preproc_input ) {

	/* Open preprocessed input */

	if ( file != null ) error ( ERR_WARNING, "Too many arguments" ) ;

	preproc_file = fopen ( api, "r" ) ;

	filename = api ;

	line_no = 1 ;

	if ( preproc_file == null ) {

	    error ( ERR_FATAL, "Can't open input file" ) ;

	}

    } else {

	/* Find the temporary file */

	int n ;

	if ( preproc_file == null ) {

	    preproc_file = tmpfile () ;

	    if ( preproc_file == null ) {

		error ( ERR_FATAL, "Can't open temporary file" ) ;

	    }

	}

	/* Do the preprocessing */

	preproc ( preproc_file, api, file, subset ) ;

	n = no_errors ;

	if ( n ) {

	    filename = null ;

	    error ( ERR_FATAL, "%d error(s) in preprocessor phase", n ) ;

	}

	if ( preproc_file == stdout ) exit ( exit_status ) ;

	filename = "temporary file" ;

	line_no = 1 ;

    }

    /* Deal with separate compilation */

    if ( separate_files ) {

	int n ;

	hash_elem *e ;

	char *s = buffer ;

	IGNORE sprintf ( s, "%s ", argv [0] ) ;

	for ( a = 1 ; a < argc ; a++ ) {

	    char *arg = argv [a] ;

	    if ( arg [0] == '-' ) {

		s = s + strlen ( s ) ;

		IGNORE sprintf ( s, "%s ", arg ) ;

	    }

	}

	s = s + strlen ( s ) ;

	IGNORE strcpy ( s, "-ac " ) ;

	filename = null ;

	e = sort_hash ( subsets ) ;

	while ( e ) {

	    separate ( e->obj ) ;

	    e = e->next ;

	}

	n = no_errors ;

	if ( n ) {

	    error ( ERR_FATAL, "%d error(s) in separate compilation", n ) ;

	}

	exit ( exit_status ) ;

    }

    /* Process the input */

    input_file = preproc_file ;

    input_pending = LEX_EOF ;

    rewind ( input_file ) ;

    ADVANCE_LEXER ;

    read_spec ( &commands ) ;

    if ( no_errors ) {

	filename = null ;

	error ( ERR_FATAL, "%d error(s) in analyser phase", no_errors ) ;

    }

    /* Perform the output */

    if ( !check_only ) {

	filename = null ;

	if ( commands && commands->objtype == OBJ_SET ) {

	    implement ( commands->u.u_obj, 1 ) ;

	    if ( show_index == 0 ) {

		print_set ( commands, 0 ) ;

		print_set ( commands, 1 ) ;

		if ( file == null ) {

		    hash_elem *e = sort_hash ( subsets ) ;

		    print_makefile ( api, e, 0 ) ;

		    print_makefile ( api, e, 1 ) ;

		}

	    } else {

		if ( show_index == 1 ) {

		    print_index ( commands ) ;

		} else {

		    print_machine_index ( commands ) ;

		}

	    }

	}

    }

    return ( exit_status ) ;

}