src/xml.[ch]: New files

Copied from boukengine.

3 files changed, 215 insertions, 1 deletions

diff --git a/src/local.mk b/src/local.mk
index 1907214..9e51a3d 100644
--- a/src/local.mk
+++ b/src/local.mk
@@ -1,4 +1,6 @@
 dodge_balls_SOURCES += \
 	%reldir%/main.c \
 	%reldir%/output.c \
-	%reldir%/output.h
+	%reldir%/output.h \
+	%reldir%/xml.c \
+	%reldir%/xml.h
diff --git a/src/xml.c b/src/xml.c
new file mode 100644
index 0000000..c28fbc4
--- /dev/null
+++ b/src/xml.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2013  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 <string.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <expat.h>
+#include <SDL_stdinc.h>
+#include "xml.h"
+#include "logging.h"
+
+struct xml_node {
+	void *data;
+	XML_StartElementHandler start;
+	XML_EndElementHandler end;
+	XML_CharacterDataHandler charhndl;
+	struct xml_node *parent;
+};
+
+int
+xml_check_tag(const char *found, const char *expected)
+{
+	return strcmp(found, expected) == 0;
+}
+
+void
+xml_unexpected_start_tag(XML_Parser p, const char *found, const char *expected)
+{
+	warn("Found \"%s\" start tag where expected one of \"%s\" in map",
+			found, expected);
+	XML_StopParser(p, XML_FALSE);
+}
+
+void
+xml_unexpected_end_tag(XML_Parser p, const char *found, const char *expected)
+{
+	warn("Found \"%s\" end tag where expected one of \"%s\" in map",
+			found, expected);
+	XML_StopParser(p, XML_FALSE);
+}
+
+void
+xml_get_uint32_attr(XML_Parser p, const char **attr, const char *name,
+		Uint32 *dest, int req)
+{
+	for (; attr[0] != NULL; attr += 2) {
+		if (strcmp(attr[0], name) == 0) {
+			if (sscanf(attr[1], "%" PRIu32, dest) == 1) {
+				return;
+			} else if (req) {
+				warn("Invalid \"%s\" attribute value", name);
+				XML_StopParser(p, XML_FALSE);
+			}
+		}
+	}
+	if (req) {
+		warn("Required attribute \"%s\" not found", name);
+		XML_StopParser(p, XML_FALSE);
+	}
+}
+
+void
+xml_get_int_attr(XML_Parser p, const char **attr, const char *name,
+		int *dest, int req)
+{
+	for (; attr[0] != NULL; attr += 2) {
+		if (strcmp(attr[0], name) == 0) {
+			if (sscanf(attr[1], "%d", dest) == 1) {
+				return;
+			} else if (req) {
+				warn("Invalid \"%s\" attribute value", name);
+				XML_StopParser(p, XML_FALSE);
+			}
+		}
+	}
+	if (req) {
+		warn("Required attribute \"%s\" not found", name);
+		XML_StopParser(p, XML_FALSE);
+	}
+}
+
+void
+xml_get_string_attr(XML_Parser p, const char **attr, const char *name,
+		char **dest, int req)
+{
+	for (; attr[0] != NULL; attr += 2) {
+		if (strcmp(attr[0], name) == 0) {
+			*dest = strdup(attr[1]);
+			return;
+		}
+	}
+	if (req) {
+		warn("Required attribute \"%s\" not found", name);
+		XML_StopParser(p, XML_FALSE);
+	}
+}
+
+void
+xml_node_push(XML_Parser p, void *data,
+		XML_StartElementHandler start, XML_EndElementHandler end,
+		XML_CharacterDataHandler charhndl)
+{
+	struct xml_node *n;
+
+	n = malloc(sizeof(*n));
+	if (n == NULL) {
+		return;
+	}
+	n->data = data;
+	n->start = start;
+	n->end = end;
+	n->charhndl = charhndl;
+	n->parent = (struct xml_node *) XML_GetUserData(p);
+	XML_SetUserData(p, n);
+	XML_SetStartElementHandler(p, n->start);
+	XML_SetEndElementHandler(p, n->end);
+	XML_SetCharacterDataHandler(p, n->charhndl);
+}
+
+void *
+xml_node_pop(XML_Parser p)
+{
+	struct xml_node *n;
+	void *data;
+
+	n = (struct xml_node *) XML_GetUserData(p);
+	data = n->data;
+	XML_SetUserData(p, n->parent);
+	free(n);
+
+	n = (struct xml_node *) XML_GetUserData(p);
+	if (n == NULL) {
+		XML_SetStartElementHandler(p, NULL);
+		XML_SetEndElementHandler(p, NULL);
+		XML_SetCharacterDataHandler(p, NULL);
+	} else {
+		XML_SetStartElementHandler(p, n->start);
+		XML_SetEndElementHandler(p, n->end);
+		XML_SetCharacterDataHandler(p, n->charhndl);
+	}
+
+	return data;
+}
+
+void *
+xml_node_peek(XML_Parser p)
+{
+	struct xml_node *n;
+
+	n = (struct xml_node *) XML_GetUserData(p);
+
+	return n->data;
+}
diff --git a/src/xml.h b/src/xml.h
new file mode 100644
index 0000000..519ca2d
--- /dev/null
+++ b/src/xml.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2013  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/>.
+ */
+
+#ifndef XML_H
+#define XML_H
+
+#include <expat.h>
+#include <SDL_stdinc.h>
+
+int xml_check_tag(const char *found, const char *expected);
+void xml_unexpected_start_tag(XML_Parser p, const char *found,
+		const char *expected);
+void xml_unexpected_end_tag(XML_Parser p, const char *found,
+		const char *expected);
+void xml_get_int_attr(XML_Parser p, const char **attr, const char *name,
+		int *dest, int req);
+void xml_get_uint32_attr(XML_Parser p, const char **attr, const char *name,
+		Uint32 *dest, int req);
+void xml_get_string_attr(XML_Parser p, const char **attr, const char *name,
+		char **dest, int req);
+void xml_node_push(XML_Parser p, void *data,
+		XML_StartElementHandler start, XML_EndElementHandler end,
+		XML_CharacterDataHandler charhndl);
+void *xml_node_pop(XML_Parser p);
+void *xml_node_peek(XML_Parser p);
+
+#endif