add kai_tag_attr_to_long

1 files changed, 19 insertions, 0 deletions

diff --git a/src/xml/xml.c b/src/xml/xml.c
index 33782c4..24d544c 100644
--- a/src/xml/xml.c
+++ b/src/xml/xml.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include "xml.h"
 
 /* parse a string into a document */
@@ -31,3 +32,21 @@ char * kai_tag_get_attr(struct kai_tag_t *t, const char *attr)
 	}
 	return NULL;
 }
+
+
+long kai_tag_attr_to_long(
+	struct kai_tag_t *t, const char *attr, 
+	long base, int *flag)
+{
+	char *val = kai_tag_get_attr(t, attr);
+	if (val == NULL) {
+		/* attribute not present, fall back to base */
+		if (flag != NULL)
+			*flag = 1;
+		return base;
+	}
+
+	if (flag != NULL)
+		*flag = 0;
+	return strtol(val, NULL, 10);
+}