1 files changed, 35 insertions, 1 deletions

diff --git a/source/base/base_string.h b/source/base/base_string.h
index eb51e65..1f754f3 100644
--- a/source/base/base_string.h
+++ b/source/base/base_string.h
@@ -38,7 +38,7 @@ struct string32
 
 //- string linked list implementation
 typedef struct string8_node string8_node;
-struct string8_node 
+struct string8_node
 {
     string8 *next;
     string8 string;
@@ -82,3 +82,37 @@ string8_appendc(string8 *buf, u8 c)
 }
 
 #endif /* BASE_STRING_H */
+
+#ifdef BASE_IMPLEMENTATION
+
+internal b32
+is_alpha(u8 point)
+{
+    return ((point >= 'a' && point <= 'z') || (point >= 'A' && point <= 'Z') || (point == '_'));
+}
+
+internal b32
+is_digit(u8 point)
+{
+    return (point >= '0' && point <= '9');
+}
+
+internal b32
+is_alpha_num(u8 point)
+{
+    return (is_alpha(point) || is_digit(point));
+}
+
+internal b32 is_whitespace(u8 point)
+{
+    return (point == '\n' || point == '\r' || point == ' ' || point == '\t');
+}
+
+internal b32
+is_slash(u8 point)
+{
+  return (point == '/' || point == '\\');
+}
+
+
+#endif