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/*

 * Copyright (c) 2002-2005 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 <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"

/*

 * INPUT AND OUTPUT DIRECTORIES

 *

 * The variable input_dir consists of a colon-separated list of directories

 * to be searched for input files.  output_incl_dir and output_src_dir

 * give respectively the output include and output source directories.

 * The lengths of these directory names (plus one) are also given.

 */

char *input_dir;

char *output_incl_dir;

char *output_src_dir;

int output_incl_len;

int output_src_len;

/*

    SIGNAL HANDLER

    This routine handles caught signals.

*/

static void

handler(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) IGNORE printf("Removing %s ...\n", 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(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) IGNORE printf("Executing '%s' ...\n", 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(object *p, 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(int argc, 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 (output_src_len==0 || output_incl_len==0){

	error(ERR_FATAL, "No output directories specified");	    

    }

    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);

}