From c2ef63ae9c5a4a1e927381dc232de52aea2b0759 Mon Sep 17 00:00:00 2001
From: Ole Morud <ole.morud@gmail.com>
Date: Thu, 1 Aug 2024 19:45:09 +0200
Subject: [PATCH] Make str const and add str_slice

---
 src/include/str.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/include/str.h b/src/include/str.h
index 82dbd14..c679e28 100644
--- a/src/include/str.h
+++ b/src/include/str.h
@@ -3,8 +3,16 @@
 #include <stddef.h>
 
 struct str {
-    char* data; 
-    size_t len;
+    const char*  data; 
+    const size_t len;
 };
 
 #define str_attach(cstr) (struct str){.data = cstr, .len = sizeof(cstr)-1}
+
+static inline struct str str_slice(struct str s, size_t begin, size_t end)
+{
+    return (struct str) {
+        .data = s.data + begin,
+        .len = s.len - begin - end,
+    };
+}