diff options
Diffstat (limited to 'game.c')
| -rw-r--r-- | game.c | 297 |
1 files changed, 297 insertions, 0 deletions
@@ -0,0 +1,297 @@ +/* $Id: game.c,v 1.1.1.1 2010/07/17 17:30:32 culot Exp $ */ + +/* + * Copyright (c) 2010 Frederic Culot <frederic@culot.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: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the + * following disclaimer. + * + * - 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. + * + * 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 + * OWNER 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. + */ + +#include <stdio.h> +#include <string.h> +#include <ctype.h> + +#include "oldrunner.h" + +#ifdef LEVELS_PATH +# define LEVELS LEVELS_PATH "/original.lvl" +#else +# define LEVELS "./levels/original.lvl" +#endif + +#define POINTS_FOR_MONEY 50 +#define LIVES_AT_START 5 + +static struct game_info ginfo; + +static void +game_lost (void) +{ + struct usr_input input; + + gfx_game_over (); + gfx_get_input (&input); + game_end (); +} + +void +game_won (void) +{ + struct usr_input input; + + gfx_game_won (); + gfx_get_input (&input); + game_end (); +} + +void +game_init (int startlvl) +{ + lvl_init (); + if (!game_load (LEVELS)) + EXIT ("Could not load game levels. Aborting..."); + ginfo.lives = LIVES_AT_START; + ginfo.level = startlvl + 1; + gfx_init (); + lvl_load (startlvl); + hero_init (); + game_update (); +} + +/* + * The window will be centered on player either if the user requests it or if + * the level board is too large to fit it the screen. + */ +static void +set_view (void) +{ + struct size lvl; + + lvl.w = lvl_width (); + lvl.h = lvl_height (); + + if (AUTO_CENTER_MODE || lvl.h > VIEWPORT_HEIGHT || lvl.w > VIEWPORT_WIDTH) + { + struct coord player_pos; + + hero_get_pos (&player_pos); + gfx_center_at (&player_pos); + } + else + { + struct coord fixed_pos; + + coord_set_yx (&fixed_pos, VIEWPORT_HEIGHT / 2, lvl.w / 2); + gfx_center_at (&fixed_pos); + } +} + +void +game_update (void) +{ + set_view (); + lvl_objects_update (); + hero_draw (); + if (!(ginfo.state & NO_CHANGE)) + { + gfx_update_info (&ginfo); + ginfo.state = NO_CHANGE; + } + gfx_update (); +} + +void +game_end (void) +{ + gfx_end (); + exit (0); +} + +static unsigned +read_level_row (char *row, unsigned rownum) +{ + char *rowend; + int len; + + if (*row != '[') + return 0; + row++; + + if (!(rowend = strchr (row, ']'))) + return 0; + *rowend = '\0'; + len = rowend - row; + + return lvl_set_row (rownum, len, row); +} + +static unsigned +store_level_attr (const char *attr, char *val) +{ + if (!strcmp (attr, "level")) + return lvl_set_name (val); + else if (!strcmp (attr, "author")) + return lvl_set_author (val); + else if (!strcmp (attr, "size")) + return lvl_set_size (val); + else + return 0; +} + +/* XXX use strsep instead. */ +static unsigned +read_level_attr (char *line) +{ + char *p, *attr, *val; + + attr = p = line; + + while (!isblank ((int)(*p))) + p++; + *p++ = '\0'; + + while (isblank ((int)(*p))) + p++; + val = p; + + return store_level_attr (attr, val); +} + +/* + * XXX improve comment. + * + * A game file contains the description of the levels. + * The following rules apply: + * - empty lines are ignored, as well as those beginning with # + * - the following keywords are used to describe a level: + * - level: name of the level (default: "") + * - author: author of the level (default: "") + * - size: in the form widthxlength (default: 26x16) + * - if keywords are present, they must be placed before the level layout + * - the reading of a level row stops as soon as the line does + * not start with '[', meaning a layout description must not have empty + * lines + */ +unsigned +game_load (const char *path) +{ + FILE *f; + char *buf; + unsigned rownum, newlevel; + + if (!(f = io_fopen (LEVELS))) + return 0; + + newlevel = 1; + rownum = 0; + while ((buf = io_getln (f))) + { + char *p; + +#define CHK_NEW_LVL do { \ + if (newlevel) \ + { \ + lvl_add_new (); \ + newlevel = 0; \ + rownum = 0; \ + } \ + } while (0) + + /* Remove trailing spaces. */ + p = buf; + while (isblank ((int)(*p))) + p++; + + switch (*p) + { + case '[': + CHK_NEW_LVL; + read_level_row (p, rownum); + rownum++; + break; + case '#': + case '\0': + if (rownum) + newlevel = 1; + continue; + default: + if (rownum) + newlevel = 1; + CHK_NEW_LVL; + read_level_attr (p); + break; + } + +#undef CHK_NEW_LVL + } + + io_fclose (f); + + return 1; +} + +void +game_score_inc (void) +{ + ginfo.state |= SCORE_CHANGE; + ginfo.score += POINTS_FOR_MONEY; +} + +int +game_level_num (void) +{ + return ginfo.level; +} + +void +game_level_inc (void) +{ + ginfo.state |= LEVEL_CHANGE; + ginfo.level++; +} + +void +game_level_dec (void) +{ + ginfo.state |= LEVEL_CHANGE; + ginfo.level--; +} + +void +game_lives_inc (void) +{ + ginfo.state |= LIVES_CHANGE; + ginfo.lives++; +} + +void +game_lives_dec (void) +{ + ginfo.state |= LIVES_CHANGE; + if (ginfo.lives == 0) + game_lost (); + ginfo.lives--; +} |