diff options
Diffstat (limited to 'src/map.c')
| -rw-r--r-- | src/map.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/map.c b/src/map.c new file mode 100644 index 0000000..01b9b10 --- /dev/null +++ b/src/map.c @@ -0,0 +1,191 @@ +/* + * Copyright (C) 2021 P. J. McDermott + * + * This file is part of Dodge Balls + * + * Dodge Balls is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Dodge Balls is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Dodge Balls. If not, see <http://www.gnu.org/licenses/>. + */ +#include <expat.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "dirs.h" +#include "map.h" +#include "output.h" +#include "xml.h" + +struct db_map { +}; + +static char * +_db_map_path(const char *game_id, const char *file, const char *ext) +{ + const char *games_dir; + char *path; + + games_dir = db_get_games_dir(); + + path = malloc((strlen(games_dir) + strlen(game_id) + strlen(file) + + strlen(ext) + 3) * sizeof(*path)); + if (path == NULL) { + db_err("Failed to allocate memory"); + return NULL; + } + + sprintf(path, "%s/%s/%s%s", games_dir, game_id, file, ext); + + return path; +} + +static void XMLCALL +_db_tmx_invalid_end(void *pv, const char *name) +{ + XML_Parser p; + + db_dbg(" </%s> (invalid)", name); + + p = (XML_Parser) pv; + + db_xml_unexpected_end_tag(p, name, ""); +} + +static void XMLCALL +_db_tmx_invalid_start(void *pv, const char *name, + const char **attr __attribute__((__unused__))) +{ + XML_Parser p; + + db_dbg(" <%s> (invalid)", name); + + p = (XML_Parser) pv; + + db_xml_node_push(p, NULL, _db_tmx_invalid_start, + _db_tmx_invalid_end, NULL); +} + +static void XMLCALL +_db_tmx_map_end(void *pv, const char *name) +{ + XML_Parser p; + + db_dbg(" </%s> (map)", name); + + p = (XML_Parser) pv; + + if (db_xml_check_tag(name, "map")) { + db_xml_node_pop(p); + } else { + db_xml_unexpected_end_tag(p, name, "map"); + } +} + +static void XMLCALL +_db_tmx_map_start(void *pv, const char *name, + const char **attr __attribute__((__unused__))) +{ + XML_Parser p; + struct db_map *map; + + db_dbg(" <%s> (map)", name); + + p = (XML_Parser) pv; + map = db_xml_node_peek(p); + + if (db_xml_check_tag(name, "map")) { + db_xml_node_push(p, map, _db_tmx_invalid_start, + _db_tmx_map_end, NULL); + } else { + db_xml_unexpected_start_tag(p, name, "map"); + } +} + +struct db_map * +db_map_new(const char *game_id, const char *level_id) +{ + struct db_map *map; + XML_Parser p; + char *path; + FILE *fp; + void *buf; + size_t len; + enum XML_Status status; + + map = calloc(1, sizeof(*map)); + if (map == NULL) { + db_err("Failed to allocate memory"); + return NULL; + } + + p = XML_ParserCreate(NULL); + if (p == NULL) { + free(map); + return NULL; + } + XML_UseParserAsHandlerArg(p); + db_xml_node_push(p, map, _db_tmx_map_start, _db_tmx_invalid_end, NULL); + + path = _db_map_path(game_id, level_id, ".tmx"); + if (path == NULL) { + db_xml_node_pop(p); + XML_ParserFree(p); + free(path); + free(map); + return NULL; + } + + fp = fopen(path, "rb"); + if (fp == NULL) { + db_xml_node_pop(p); + XML_ParserFree(p); + free(path); + free(map); + return NULL; + } + + buf = XML_GetBuffer(p, 8192); + if (buf == NULL) { + db_xml_node_pop(p); + XML_ParserFree(p); + free(path); + fclose(fp); + free(map); + return NULL; + } + + db_dbg("Parsing <%s>:", path); + free(path); + + while (!feof(fp)) { + len = fread(buf, 1, 8192, fp); + status = XML_ParseBuffer(p, len, feof(fp)); + if (status == XML_STATUS_OK) { + continue; + } + db_err("Failed to parse map information (%s)", + XML_ErrorString(XML_GetErrorCode(p))); + db_xml_node_pop(p); + XML_ParserFree(p); + fclose(fp); + free(map); + return NULL; + } + + db_dbg("Parsing done"); + + db_xml_node_pop(p); + XML_ParserFree(p); + fclose(fp); + + return map; +} |