1 files changed, 25 insertions, 0 deletions
diff --git a/demo/util.c b/demo/util.c
index 457a32c..99566bd 100644
--- a/demo/util.c
+++ b/demo/util.c
@@ -1,3 +1,7 @@
+#include <stddef.h>
+
+#include "demo.h"
+
 int strcmp(const char *s1, const char *s2)
 {
     while (*s1 && *s1 == *s2)
@@ -5,3 +9,24 @@ int strcmp(const char *s1, const char *s2)
 
     return (int)*(const unsigned char *)s1 - (int)*(const unsigned char *)s2;
 }
+
+char *strtok_input(char **tokens)
+{
+	char *start = *tokens;
+	while (*start && *start == ' ')
+		++start;
+
+	if (!*start) {
+		*tokens = start;
+		return NULL;
+	}
+
+	char *end = start + 1;
+	while (*end && *end != ' ')
+		++end;
+
+	*tokens = *end ? end + 1 : end;
+	*end = '\0';
+
+	return start;
+}