skills.c

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/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,        *
 *  Michael Seifert, Hans Henrik Strfeldt, Tom Madsen, and Katja Nyboe.    *
 *                                                                         *
 *  Merc Diku Mud improvments copyright (C) 1992, 1993 by Michael          *
 *  Chastain, Michael Quan, and Mitchell Tse.                              *
 *                                                                         *
 *  In order to use any part of this Merc Diku Mud, you must comply with   *
 *  both the original Diku license in 'license.doc' as well the Merc       *
 *  license in 'license.txt'.  In particular, you may not remove either of *
 *  these copyright notices.                                               *
 *                                                                         *
 *  Much time and thought has gone into this software and you are          *
 *  benefitting.  We hope that you share your changes too.  What goes      *
 *  around, comes around.                                                  *
 ***************************************************************************/

/***************************************************************************
 *  ROM 2.4 is copyright 1993-1998 Russ Taylor                             *
 *  ROM has been brought to you by the ROM consortium                      *
 *      Russ Taylor (rtaylor@hypercube.org)                                *
 *      Gabrielle Taylor (gtaylor@hypercube.org)                           *
 *      Brian Moore (zump@rom.org)                                         *
 *  By using this code, you have agreed to follow the terms of the         *
 *  ROM license, in the file Rom24/doc/rom.license                         *
 ***************************************************************************/

#if defined(macintosh)
#include <types.h>
#include <time.h>
#else
#include <sys/types.h>
#include <sys/time.h>
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "merc.h"
#include "interp.h"
#include "magic.h"
#include "recycle.h"

/* used to get new skills */
void do_gain (CHAR_DATA * ch, char *argument)
{
    char buf[MAX_STRING_LENGTH];
    char arg[MAX_INPUT_LENGTH];
    CHAR_DATA *trainer;
    int gn = 0, sn = 0;

    if (IS_NPC (ch))
        return;

    /* find a trainer */
    for (trainer = ch->in_room->people;
         trainer != NULL; trainer = trainer->next_in_room)
        if (IS_NPC (trainer) && IS_SET (trainer->act, ACT_GAIN))
            break;

    if (trainer == NULL || !can_see (ch, trainer))
    {
        send_to_char ("You can't do that here.\n\r", ch);
        return;
    }

    one_argument (argument, arg);

    if (arg[0] == '\0')
    {
        do_function (trainer, &do_say, "Pardon me?");
        return;
    }

    if (!str_prefix (arg, "list"))
    {
        int col;

        col = 0;

        sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s\n\r",
                 "group", "cost", "group", "cost", "group", "cost");
        send_to_char (buf, ch);

        for (gn = 0; gn < MAX_GROUP; gn++)
        {
            if (group_table[gn].name == NULL)
                break;

            if (!ch->pcdata->group_known[gn]
                && group_table[gn].rating[ch->class] > 0)
            {
                sprintf (buf, "%-18s %-5d ",
                         group_table[gn].name,
                         group_table[gn].rating[ch->class]);
                send_to_char (buf, ch);
                if (++col % 3 == 0)
                    send_to_char ("\n\r", ch);
            }
        }
        if (col % 3 != 0)
            send_to_char ("\n\r", ch);

        send_to_char ("\n\r", ch);

        col = 0;

        sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s\n\r",
                 "skill", "cost", "skill", "cost", "skill", "cost");
        send_to_char (buf, ch);

        for (sn = 0; sn < MAX_SKILL; sn++)
        {
            if (skill_table[sn].name == NULL)
                break;

            if (!ch->pcdata->learned[sn]
                && skill_table[sn].rating[ch->class] > 0
                && skill_table[sn].spell_fun == spell_null)
            {
                sprintf (buf, "%-18s %-5d ",
                         skill_table[sn].name,
                         skill_table[sn].rating[ch->class]);
                send_to_char (buf, ch);
                if (++col % 3 == 0)
                    send_to_char ("\n\r", ch);
            }
        }
        if (col % 3 != 0)
            send_to_char ("\n\r", ch);
        return;
    }

    if (!str_prefix (arg, "practice") || !str_prefix (arg, "prac"))
    {
        if (ch->train < 1)
        {
            act ("$N tells you 'You are not read yet.'",
                    ch,NULL,trainer, TO_CHAR);
            return;
        }
        act ("$N helps you apply your training to practice.",
                ch,NULL,trainer, TO_CHAR);
        ch->train -=1;
        ch->practice +=5;
        return;
    }

    
    if (!str_prefix (arg, "convert")|| !str_prefix (arg, "conv"))
    {
        if (ch->practice < 5)
        {
            act ("$N tells you 'You are not yet ready.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        act ("$N helps you apply your practice to training",
             ch, NULL, trainer, TO_CHAR);
        ch->practice -= 5;
        ch->train += 1;
        return;
    }

    if (!str_prefix (arg, "points"))
    {
        if (ch->train < 2)
        {
            act ("$N tells you 'You are not yet ready.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        if (ch->pcdata->points <= 40)
        {
            act ("$N tells you 'There would be no point in that.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        act ("$N trains you, and you feel more at ease with your skills.",
             ch, NULL, trainer, TO_CHAR);

        ch->train -= 2;
        ch->pcdata->points -= 1;
        ch->exp = exp_per_level (ch, ch->pcdata->points) * ch->level;
        return;
    }

    /* else add a group/skill */

    gn = group_lookup (argument);
    if (gn > 0)
    {
        if (ch->pcdata->group_known[gn])
        {
            act ("$N tells you 'You already know that group!'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        if (group_table[gn].rating[ch->class] <= 0)
        {
            act ("$N tells you 'That group is beyond your powers.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        if (ch->train < group_table[gn].rating[ch->class])
        {
            act ("$N tells you 'You are not yet ready for that group.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        /* add the group */
        gn_add (ch, gn);
        act ("$N trains you in the art of $t",
             ch, group_table[gn].name, trainer, TO_CHAR);
        ch->train -= group_table[gn].rating[ch->class];
        return;
    }

    sn = skill_lookup (argument);
    if (sn > -1)
    {
        if (skill_table[sn].spell_fun != spell_null)
        {
            act ("$N tells you 'You must learn the full group.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }


        if (ch->pcdata->learned[sn])
        {
            act ("$N tells you 'You already know that skill!'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        if (skill_table[sn].rating[ch->class] <= 0)
        {
            act ("$N tells you 'That skill is beyond your powers.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        if (ch->train < skill_table[sn].rating[ch->class])
        {
            act ("$N tells you 'You are not yet ready for that skill.'",
                 ch, NULL, trainer, TO_CHAR);
            return;
        }

        /* add the skill */
        ch->pcdata->learned[sn] = 1;
        act ("$N trains you in the art of $t",
             ch, skill_table[sn].name, trainer, TO_CHAR);
        ch->train -= skill_table[sn].rating[ch->class];
        return;
    }

    act ("$N tells you 'I do not understand...'", ch, NULL, trainer, TO_CHAR);
}




/* RT spells and skills show the players spells (or skills) */

void do_spells (CHAR_DATA * ch, char *argument)
{
    BUFFER *buffer;
    char arg[MAX_INPUT_LENGTH];
    char spell_list[LEVEL_HERO + 1][MAX_STRING_LENGTH];
    char spell_columns[LEVEL_HERO + 1];
    int sn, level, min_lev = 1, max_lev = LEVEL_HERO, mana;
    bool fAll = FALSE, found = FALSE;
    char buf[MAX_STRING_LENGTH];

    if (IS_NPC (ch))
        return;

    if (argument[0] != '\0')
    {
        fAll = TRUE;

        if (str_prefix (argument, "all"))
        {
            argument = one_argument (argument, arg);
            if (!is_number (arg))
            {
                send_to_char ("Arguments must be numerical or all.\n\r", ch);
                return;
            }
            max_lev = atoi (arg);

            if (max_lev < 1 || max_lev > LEVEL_HERO)
            {
                sprintf (buf, "Levels must be between 1 and %d.\n\r",
                         LEVEL_HERO);
                send_to_char (buf, ch);
                return;
            }

            if (argument[0] != '\0')
            {
                argument = one_argument (argument, arg);
                if (!is_number (arg))
                {
                    send_to_char ("Arguments must be numerical or all.\n\r",
                                  ch);
                    return;
                }
                min_lev = max_lev;
                max_lev = atoi (arg);

                if (max_lev < 1 || max_lev > LEVEL_HERO)
                {
                    sprintf (buf,
                             "Levels must be between 1 and %d.\n\r",
                             LEVEL_HERO);
                    send_to_char (buf, ch);
                    return;
                }

                if (min_lev > max_lev)
                {
                    send_to_char ("That would be silly.\n\r", ch);
                    return;
                }
            }
        }
    }


    /* initialize data */
    for (level = 0; level < LEVEL_HERO + 1; level++)
    {
        spell_columns[level] = 0;
        spell_list[level][0] = '\0';
    }

    for (sn = 0; sn < MAX_SKILL; sn++)
    {
        if (skill_table[sn].name == NULL)
            break;

        if ((level = skill_table[sn].skill_level[ch->class]) < LEVEL_HERO + 1
            && (fAll || level <= ch->level)
            && level >= min_lev && level <= max_lev
            && skill_table[sn].spell_fun != spell_null
            && ch->pcdata->learned[sn] > 0)
        {
            found = TRUE;
            level = skill_table[sn].skill_level[ch->class];
            if (ch->level < level)
                sprintf (buf, "%-18s n/a      ", skill_table[sn].name);
            else
            {
                mana = UMAX (skill_table[sn].min_mana,
                             100 / (2 + ch->level - level));
                sprintf (buf, "%-18s  %3d mana (%3d%%) ", skill_table[sn].name,
                         mana,ch->pcdata->learned[sn]);
            }

            if (spell_list[level][0] == '\0')
                sprintf (spell_list[level], "\n\rLevel %2d: %s", level, buf);
            else
            {                    /* append */

                if (++spell_columns[level] % 2 == 0)
                    strcat (spell_list[level], "\n\r          ");
                strcat (spell_list[level], buf);
            }
        }
    }

    /* return results */

    if (!found)
    {
        send_to_char ("No spells found.\n\r", ch);
        return;
    }

    buffer = new_buf ();
    for (level = 0; level < LEVEL_HERO + 1; level++)
        if (spell_list[level][0] != '\0')
            add_buf (buffer, spell_list[level]);
    add_buf (buffer, "\n\r");
    page_to_char (buf_string (buffer), ch);
    free_buf (buffer);
}

void do_skills (CHAR_DATA * ch, char *argument)
{
    BUFFER *buffer;
    char arg[MAX_INPUT_LENGTH];
    char skill_list[LEVEL_HERO + 1][MAX_STRING_LENGTH];
    char skill_columns[LEVEL_HERO + 1];
    int sn, level, min_lev = 1, max_lev = LEVEL_HERO;
    bool fAll = FALSE, found = FALSE;
    char buf[MAX_STRING_LENGTH];

    if (IS_NPC (ch))
        return;

    if (argument[0] != '\0')
    {
        fAll = TRUE;

        if (str_prefix (argument, "all"))
        {
            argument = one_argument (argument, arg);
            if (!is_number (arg))
            {
                send_to_char ("Arguments must be numerical or all.\n\r", ch);
                return;
            }
            max_lev = atoi (arg);

            if (max_lev < 1 || max_lev > LEVEL_HERO)
            {
                sprintf (buf, "Levels must be between 1 and %d.\n\r",
                         LEVEL_HERO);
                send_to_char (buf, ch);
                return;
            }

            if (argument[0] != '\0')
            {
                argument = one_argument (argument, arg);
                if (!is_number (arg))
                {
                    send_to_char ("Arguments must be numerical or all.\n\r",
                                  ch);
                    return;
                }
                min_lev = max_lev;
                max_lev = atoi (arg);

                if (max_lev < 1 || max_lev > LEVEL_HERO)
                {
                    sprintf (buf,
                             "Levels must be between 1 and %d.\n\r",
                             LEVEL_HERO);
                    send_to_char (buf, ch);
                    return;
                }

                if (min_lev > max_lev)
                {
                    send_to_char ("That would be silly.\n\r", ch);
                    return;
                }
            }
        }
    }


    /* initialize data */
    for (level = 0; level < LEVEL_HERO + 1; level++)
    {
        skill_columns[level] = 0;
        skill_list[level][0] = '\0';
    }

    for (sn = 0; sn < MAX_SKILL; sn++)
    {
        if (skill_table[sn].name == NULL)
            break;

        if ((level = skill_table[sn].skill_level[ch->class]) < LEVEL_HERO + 1
            && (fAll || level <= ch->level)
            && level >= min_lev && level <= max_lev
            && skill_table[sn].spell_fun == spell_null
            && ch->pcdata->learned[sn] > 0)
        {
            found = TRUE;
            level = skill_table[sn].skill_level[ch->class];
            if (ch->level < level)
                sprintf (buf, "%-18s n/a      ", skill_table[sn].name);
            else
                sprintf (buf, "%-18s %3d%%      ", skill_table[sn].name,
                         ch->pcdata->learned[sn]);

            if (skill_list[level][0] == '\0')
                sprintf (skill_list[level], "\n\rLevel %2d: %s", level, buf);
            else
            {                    /* append */

                if (++skill_columns[level] % 2 == 0)
                    strcat (skill_list[level], "\n\r          ");
                strcat (skill_list[level], buf);
            }
        }
    }

    /* return results */

    if (!found)
    {
        send_to_char ("No skills found.\n\r", ch);
        return;
    }

    buffer = new_buf ();
    for (level = 0; level < LEVEL_HERO + 1; level++)
        if (skill_list[level][0] != '\0')
            add_buf (buffer, skill_list[level]);
    add_buf (buffer, "\n\r");
    page_to_char (buf_string (buffer), ch);
    free_buf (buffer);
}

/* shows skills, groups and costs (only if not bought) */
void list_group_costs (CHAR_DATA * ch)
{
    char buf[100];
    int gn, sn, col;

    if (IS_NPC (ch))
        return;

    col = 0;

    sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s\n\r", "group", "cp",
             "group", "cp", "group", "cp");
    send_to_char (buf, ch);

    for (gn = 0; gn < MAX_GROUP; gn++)
    {
        if (group_table[gn].name == NULL)
            break;

        if (!ch->gen_data->group_chosen[gn]
            && !ch->pcdata->group_known[gn]
            && group_table[gn].rating[ch->class] > 0)
        {
            sprintf (buf, "%-18s %-5d ", group_table[gn].name,
                     group_table[gn].rating[ch->class]);
            send_to_char (buf, ch);
            if (++col % 3 == 0)
                send_to_char ("\n\r", ch);
        }
    }
    if (col % 3 != 0)
        send_to_char ("\n\r", ch);
    send_to_char ("\n\r", ch);

    col = 0;

    sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s\n\r", "skill", "cp",
             "skill", "cp", "skill", "cp");
    send_to_char (buf, ch);

    for (sn = 0; sn < MAX_SKILL; sn++)
    {
        if (skill_table[sn].name == NULL)
            break;

        if (!ch->gen_data->skill_chosen[sn]
            && ch->pcdata->learned[sn] == 0
            && skill_table[sn].spell_fun == spell_null
            && skill_table[sn].rating[ch->class] > 0)
        {
            sprintf (buf, "%-18s %-5d ", skill_table[sn].name,
                     skill_table[sn].rating[ch->class]);
            send_to_char (buf, ch);
            if (++col % 3 == 0)
                send_to_char ("\n\r", ch);
        }
    }
    if (col % 3 != 0)
        send_to_char ("\n\r", ch);
    send_to_char ("\n\r", ch);

    sprintf (buf, "Creation points: %d\n\r", ch->pcdata->points);
    send_to_char (buf, ch);
    sprintf (buf, "Experience per level: %d\n\r",
             exp_per_level (ch, ch->gen_data->points_chosen));
    send_to_char (buf, ch);
    return;
}


void list_group_chosen (CHAR_DATA * ch)
{
    char buf[100];
    int gn, sn, col;

    if (IS_NPC (ch))
        return;

    col = 0;

    sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s", "group", "cp", "group",
             "cp", "group", "cp\n\r");
    send_to_char (buf, ch);

    for (gn = 0; gn < MAX_GROUP; gn++)
    {
        if (group_table[gn].name == NULL)
            break;

        if (ch->gen_data->group_chosen[gn]
            && group_table[gn].rating[ch->class] > 0)
        {
            sprintf (buf, "%-18s %-5d ", group_table[gn].name,
                     group_table[gn].rating[ch->class]);
            send_to_char (buf, ch);
            if (++col % 3 == 0)
                send_to_char ("\n\r", ch);
        }
    }
    if (col % 3 != 0)
        send_to_char ("\n\r", ch);
    send_to_char ("\n\r", ch);

    col = 0;

    sprintf (buf, "%-18s %-5s %-18s %-5s %-18s %-5s", "skill", "cp", "skill",
             "cp", "skill", "cp\n\r");
    send_to_char (buf, ch);

    for (sn = 0; sn < MAX_SKILL; sn++)
    {
        if (skill_table[sn].name == NULL)
            break;

        if (ch->gen_data->skill_chosen[sn]
            && skill_table[sn].rating[ch->class] > 0)
        {
            sprintf (buf, "%-18s %-5d ", skill_table[sn].name,
                     skill_table[sn].rating[ch->class]);
            send_to_char (buf, ch);
            if (++col % 3 == 0)
                send_to_char ("\n\r", ch);
        }
    }
    if (col % 3 != 0)
        send_to_char ("\n\r", ch);
    send_to_char ("\n\r", ch);

    sprintf (buf, "Creation points: %d\n\r", ch->gen_data->points_chosen);
    send_to_char (buf, ch);
    sprintf (buf, "Experience per level: %d\n\r",
             exp_per_level (ch, ch->gen_data->points_chosen));
    send_to_char (buf, ch);
    return;
}

int exp_per_level (CHAR_DATA * ch, int points)
{
    int expl, inc;

    if (IS_NPC (ch))
        return 1000;

    expl = 1000;
    inc = 500;

    if (points < 40)
        return 1000 * (pc_race_table[ch->race].class_mult[ch->class] ?
                       pc_race_table[ch->race].class_mult[ch->class] /
                       100 : 1);

    /* processing */
    points -= 40;

    while (points > 9)
    {
        expl += inc;
        points -= 10;
        if (points > 9)
        {
            expl += inc;
            inc *= 2;
            points -= 10;
        }
    }

    expl += points * inc / 10;

    return expl * pc_race_table[ch->race].class_mult[ch->class] / 100;
}

/* this procedure handles the input parsing for the skill generator */
bool parse_gen_groups (CHAR_DATA * ch, char *argument)
{
    char arg[MAX_INPUT_LENGTH];
    char buf[100];
    int gn, sn, i;

    if (argument[0] == '\0')
        return FALSE;

    argument = one_argument (argument, arg);

    if (!str_prefix (arg, "help"))
    {
        if (argument[0] == '\0')
        {
            do_function (ch, &do_help, "group help");
            return TRUE;
        }

        do_function (ch, &do_help, argument);
        return TRUE;
    }

    if (!str_prefix (arg, "add"))
    {
        if (argument[0] == '\0')
        {
            send_to_char ("You must provide a skill name.\n\r", ch);
            return TRUE;
        }

        gn = group_lookup (argument);
        if (gn != -1)
        {
            if (ch->gen_data->group_chosen[gn] || ch->pcdata->group_known[gn])
            {
                send_to_char ("You already know that group!\n\r", ch);
                return TRUE;
            }

            if (group_table[gn].rating[ch->class] < 1)
            {
                send_to_char ("That group is not available.\n\r", ch);
                return TRUE;
            }

            /* Close security hole */
            if (ch->gen_data->points_chosen +
                group_table[gn].rating[ch->class] > 300)
            {
                send_to_char
                    ("You cannot take more than 300 creation points.\n\r",
                     ch);
                return TRUE;
            }

            sprintf (buf, "%s group added\n\r", group_table[gn].name);
            send_to_char (buf, ch);
            ch->gen_data->group_chosen[gn] = TRUE;
            ch->gen_data->points_chosen += group_table[gn].rating[ch->class];
            gn_add (ch, gn);
            ch->pcdata->points += group_table[gn].rating[ch->class];
            return TRUE;
        }

        sn = skill_lookup (argument);
        if (sn != -1)
        {
            if (ch->gen_data->skill_chosen[sn] || ch->pcdata->learned[sn] > 0)
            {
                send_to_char ("You already know that skill!\n\r", ch);
                return TRUE;
            }

            if (skill_table[sn].rating[ch->class] < 1
                || skill_table[sn].spell_fun != spell_null)
            {
                send_to_char ("That skill is not available.\n\r", ch);
                return TRUE;
            }

            /* Close security hole */
            if (ch->gen_data->points_chosen +
                skill_table[sn].rating[ch->class] > 300)
            {
                send_to_char
                    ("You cannot take more than 300 creation points.\n\r",
                     ch);
                return TRUE;
            }
            sprintf (buf, "%s skill added\n\r", skill_table[sn].name);
            send_to_char (buf, ch);
            ch->gen_data->skill_chosen[sn] = TRUE;
            ch->gen_data->points_chosen += skill_table[sn].rating[ch->class];
            ch->pcdata->learned[sn] = 1;
            ch->pcdata->points += skill_table[sn].rating[ch->class];
            return TRUE;
        }

        send_to_char ("No skills or groups by that name...\n\r", ch);
        return TRUE;
    }

    if (!strcmp (arg, "drop"))
    {
        if (argument[0] == '\0')
        {
            send_to_char ("You must provide a skill to drop.\n\r", ch);
            return TRUE;
        }

        gn = group_lookup (argument);
        if (gn != -1 && ch->gen_data->group_chosen[gn])
        {
            send_to_char ("Group dropped.\n\r", ch);
            ch->gen_data->group_chosen[gn] = FALSE;
            ch->gen_data->points_chosen -= group_table[gn].rating[ch->class];
            gn_remove (ch, gn);
            for (i = 0; i < MAX_GROUP; i++)
            {
                if (ch->gen_data->group_chosen[gn])
                    gn_add (ch, gn);
            }
            ch->pcdata->points -= group_table[gn].rating[ch->class];
            return TRUE;
        }

        sn = skill_lookup (argument);
        if (sn != -1 && ch->gen_data->skill_chosen[sn])
        {
            send_to_char ("Skill dropped.\n\r", ch);
            ch->gen_data->skill_chosen[sn] = FALSE;
            ch->gen_data->points_chosen -= skill_table[sn].rating[ch->class];
            ch->pcdata->learned[sn] = 0;
            ch->pcdata->points -= skill_table[sn].rating[ch->class];
            return TRUE;
        }

        send_to_char ("You haven't bought any such skill or group.\n\r", ch);
        return TRUE;
    }

    if (!str_prefix (arg, "premise"))
    {
        do_function (ch, &do_help, "premise");
        return TRUE;
    }

    if (!str_prefix (arg, "list"))
    {
        list_group_costs (ch);
        return TRUE;
    }

    if (!str_prefix (arg, "learned"))
    {
        list_group_chosen (ch);
        return TRUE;
    }

    if (!str_prefix (arg, "info"))
    {
        do_function (ch, &do_groups, argument);
        return TRUE;
    }

    return FALSE;
}






/* shows all groups, or the sub-members of a group */
void do_groups (CHAR_DATA * ch, char *argument)
{
    char buf[100];
    int gn, sn, col;

    if (IS_NPC (ch))
        return;

    col = 0;

    if (argument[0] == '\0')
    {                            /* show all groups */

        for (gn = 0; gn < MAX_GROUP; gn++)
        {
            if (group_table[gn].name == NULL)
                break;
            if (ch->pcdata->group_known[gn])
            {
                sprintf (buf, "%-20s ", group_table[gn].name);
                send_to_char (buf, ch);
                if (++col % 3 == 0)
                    send_to_char ("\n\r", ch);
            }
        }
        if (col % 3 != 0)
            send_to_char ("\n\r", ch);
        sprintf (buf, "Creation points: %d\n\r", ch->pcdata->points);
        send_to_char (buf, ch);
        return;
    }

    if (!str_cmp (argument, "all"))
    {                            /* show all groups */
        for (gn = 0; gn < MAX_GROUP; gn++)
        {
            if (group_table[gn].name == NULL)
                break;
            sprintf (buf, "%-20s ", group_table[gn].name);
            send_to_char (buf, ch);
            if (++col % 3 == 0)
                send_to_char ("\n\r", ch);
        }
        if (col % 3 != 0)
            send_to_char ("\n\r", ch);
        return;
    }


    /* show the sub-members of a group */
    gn = group_lookup (argument);
    if (gn == -1)
    {
        send_to_char ("No group of that name exist.\n\r", ch);
        send_to_char
            ("Type 'groups all' or 'info all' for a full listing.\n\r", ch);
        return;
    }

    for (sn = 0; sn < MAX_IN_GROUP; sn++)
    {
        if (group_table[gn].spells[sn] == NULL)
            break;
        sprintf (buf, "%-20s ", group_table[gn].spells[sn]);
        send_to_char (buf, ch);
        if (++col % 3 == 0)
            send_to_char ("\n\r", ch);
    }
    if (col % 3 != 0)
        send_to_char ("\n\r", ch);
}

/* checks for skill improvement */
void check_improve (CHAR_DATA * ch, int sn, bool success, int multiplier)
{
    int chance;
    char buf[100];

    if (IS_NPC (ch))
        return;

    if (ch->level < skill_table[sn].skill_level[ch->class]
        || skill_table[sn].rating[ch->class] == 0
        || ch->pcdata->learned[sn] == 0 || ch->pcdata->learned[sn] == 100)
        return;                    /* skill is not known */

    /* check to see if the character has a chance to learn */
    chance = 10 * int_app[get_curr_stat (ch, STAT_INT)].learn;
    chance /= (multiplier * skill_table[sn].rating[ch->class] * 4);
    chance += ch->level;

    if (number_range (1, 1000) > chance)
        return;

    /* now that the character has a CHANCE to learn, see if they really have */

    if (success)
    {
        chance = URANGE (5, 100 - ch->pcdata->learned[sn], 95);
        if (number_percent () < chance)
        {
            sprintf (buf, "You have become better at %s!\n\r",
                     skill_table[sn].name);
            send_to_char (buf, ch);
            ch->pcdata->learned[sn]++;
            gain_exp (ch, 2 * skill_table[sn].rating[ch->class]);
        }
    }

    else
    {
        chance = URANGE (5, ch->pcdata->learned[sn] / 2, 30);
        if (number_percent () < chance)
        {
            sprintf (buf,
                     "You learn from your mistakes, and your %s skill improves.\n\r",
                     skill_table[sn].name);
            send_to_char (buf, ch);
            ch->pcdata->learned[sn] += number_range (1, 3);
            ch->pcdata->learned[sn] = UMIN (ch->pcdata->learned[sn], 100);
            gain_exp (ch, 2 * skill_table[sn].rating[ch->class]);
        }
    }
}

/* returns a group index number given the name */
int group_lookup (const char *name)
{
    int gn;

    for (gn = 0; gn < MAX_GROUP; gn++)
    {
        if (group_table[gn].name == NULL)
            break;
        if (LOWER (name[0]) == LOWER (group_table[gn].name[0])
            && !str_prefix (name, group_table[gn].name))
            return gn;
    }

    return -1;
}

/* recursively adds a group given its number -- uses group_add */
void gn_add (CHAR_DATA * ch, int gn)
{
    int i;

    ch->pcdata->group_known[gn] = TRUE;
    for (i = 0; i < MAX_IN_GROUP; i++)
    {
        if (group_table[gn].spells[i] == NULL)
            break;
        group_add (ch, group_table[gn].spells[i], FALSE);
    }
}

/* recusively removes a group given its number -- uses group_remove */
void gn_remove (CHAR_DATA * ch, int gn)
{
    int i;

    ch->pcdata->group_known[gn] = FALSE;

    for (i = 0; i < MAX_IN_GROUP; i++)
    {
        if (group_table[gn].spells[i] == NULL)
            break;
        group_remove (ch, group_table[gn].spells[i]);
    }
}

/* use for processing a skill or group for addition  */
void group_add (CHAR_DATA * ch, const char *name, bool deduct)
{
    int sn, gn;

    if (IS_NPC (ch))            /* NPCs do not have skills */
        return;

    sn = skill_lookup (name);

    if (sn != -1)
    {
        if (ch->pcdata->learned[sn] == 0)
        {                        /* i.e. not known */
            ch->pcdata->learned[sn] = 1;
            if (deduct)
                ch->pcdata->points += skill_table[sn].rating[ch->class];
        }
        return;
    }

    /* now check groups */

    gn = group_lookup (name);

    if (gn != -1)
    {
        if (ch->pcdata->group_known[gn] == FALSE)
        {
            ch->pcdata->group_known[gn] = TRUE;
            if (deduct)
                ch->pcdata->points += group_table[gn].rating[ch->class];
        }
        gn_add (ch, gn);        /* make sure all skills in the group are known */
    }
}

/* used for processing a skill or group for deletion -- no points back! */

void group_remove (CHAR_DATA * ch, const char *name)
{
    int sn, gn;

    sn = skill_lookup (name);

    if (sn != -1)
    {
        ch->pcdata->learned[sn] = 0;
        return;
    }

    /* now check groups */

    gn = group_lookup (name);

    if (gn != -1 && ch->pcdata->group_known[gn] == TRUE)
    {
        ch->pcdata->group_known[gn] = FALSE;
        gn_remove (ch, gn);        /* be sure to call gn_add on all remaining groups */
    }
}

---