/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */

/*

 * Copyright 2007 Massachusetts Institute of Technology.

 * All Rights Reserved.

 *

 * Export of this software from the United States of America may

 *   require a specific license from the United States Government.

 *   It is the responsibility of any person or organization contemplating

 *   export to obtain such a license before exporting.

 *

 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and

 * distribute this software and its documentation for any purpose and

 * without fee is hereby granted, provided that the above copyright

 * notice appear in all copies and that both that copyright notice and

 * this permission notice appear in supporting documentation, and that

 * the name of M.I.T. not be used in advertising or publicity pertaining

 * to distribution of the software without specific, written prior

 * permission.  Furthermore if you modify this software you must label

 * your software as modified software and not distribute it in such a

 * fashion that it might be confused with the original M.I.T. software.

 * M.I.T. makes no representations about the suitability of

 * this software for any purpose.  It is provided "as is" without express

 * or implied warranty.

 */

/*

 * Copyright 1987, 1988 by MIT Student Information Processing Board

 *

 * For copyright information, see copyright.h.

 */

#include "ss_internal.h"

#include "copyright.h"

#define size    sizeof(ss_data *)

/* XXX The memory in _ss_table never gets freed up until program exit!

   If you change the code to free it and stick a null pointer into

   _ss_table[sci_idx], make sure you change the allocation routine to

   not assume there are no null pointers in the middle of the

   array.  */

int ss_create_invocation(subsystem_name, version_string, info_ptr,

                         request_table_ptr, code_ptr)

    char *subsystem_name, *version_string;

    char *info_ptr;

    ss_request_table *request_table_ptr;

    int *code_ptr;

{

    int sci_idx;

    ss_data *new_table;

    ss_data **table, **tmp;

    *code_ptr = 0;

    table = _ss_table;

    new_table = (ss_data *) malloc(sizeof(ss_data));

    if (new_table == NULL) {

        *code_ptr = errno;

        return -1;

    }

    if (table == (ss_data **) NULL) {

        table = (ss_data **) malloc(2 * size);

        if (table == NULL) {

            *code_ptr = errno;

            return -1;

        }

        table[0] = table[1] = (ss_data *)NULL;

        _ss_table = table;

    }

    initialize_ss_error_table ();

    for (sci_idx = 1; table[sci_idx] != (ss_data *)NULL; sci_idx++)

        ;

    tmp = (ss_data **) realloc((char *)table,

                               ((unsigned)sci_idx+2)*size);

    if (tmp == NULL) {

        *code_ptr = errno;

        return 0;

    }

    _ss_table = table = tmp;

    table[sci_idx+1] = (ss_data *) NULL;

    table[sci_idx] = NULL;

    new_table->subsystem_name = subsystem_name;

    new_table->subsystem_version = version_string;

    new_table->argv = (char **)NULL;

    new_table->current_request = (char *)NULL;

    new_table->info_dirs = (char **)malloc(sizeof(char *));

    if (new_table->info_dirs == NULL) {

        *code_ptr = errno;

        free(new_table);

        return 0;

    }

    *new_table->info_dirs = (char *)NULL;

    new_table->info_ptr = info_ptr;

    if (asprintf(&new_table->prompt, "%s:  ", subsystem_name) < 0) {

        *code_ptr = errno;

        free(new_table->info_dirs);

        free(new_table);

        return 0;

    }

    new_table->abbrev_info = NULL;

    new_table->flags.escape_disabled = 0;

    new_table->flags.abbrevs_disabled = 0;

    new_table->rqt_tables =

        (ss_request_table **) calloc(2, sizeof(ss_request_table *));

    if (new_table->rqt_tables == NULL) {

        *code_ptr = errno;

        free(new_table->prompt);

        free(new_table->info_dirs);

        free(new_table);

        return 0;

    }

    *(new_table->rqt_tables) = request_table_ptr;

    *(new_table->rqt_tables+1) = (ss_request_table *) NULL;

    table[sci_idx] = new_table;

    return(sci_idx);

}

void

ss_delete_invocation(sci_idx)

    int sci_idx;

{

    ss_data *t;

    int ignored_code;

    t = ss_info(sci_idx);

    free(t->prompt);

    free(t->rqt_tables);

    while(t->info_dirs[0] != (char *)NULL)

        ss_delete_info_dir(sci_idx, t->info_dirs[0], &ignored_code);

    free(t->info_dirs);

    free(t);

}