diff --git a/src/doomtype.h b/src/doomtype.h
index 5ddd9ae44..95871e98c 100644
--- a/src/doomtype.h
+++ b/src/doomtype.h
@@ -107,6 +107,9 @@ typedef long ssize_t;
 char *strcasestr(const char *in, const char *what);
 #define stristr strcasestr
 
+int startswith (const char *base, const char *tag);
+int endswith (const char *base, const char *tag);
+
 #if defined (macintosh) //|| defined (__APPLE__) //skip all boolean/Boolean crap
 	#define true 1
 	#define false 0
diff --git a/src/string.c b/src/string.c
index 5534a3f0c..f48788e35 100644
--- a/src/string.c
+++ b/src/string.c
@@ -52,3 +52,19 @@ size_t strlcpy(char *dst, const char *src, size_t siz)
 #endif
 
 #include "strcasestr.c"
+
+int startswith(const char *path, const char *tag)
+{
+	return !strncmp(path, tag, strlen(tag));
+}
+
+int endswith(const char *base, const char *tag)
+{
+	const size_t base_length = strlen(base);
+	const size_t tag_length = strlen(tag);
+
+	if (tag_length > base_length)
+		return false;
+
+	return !memcmp(&base[base_length - tag_length], tag, tag_length);
+}