Merge branch 'master' of github.com:omnisci3nce/celeritas-core

1 files changed, 30 insertions, 0 deletions

diff --git a/src/std/str.c b/src/std/str.c
index 27f8f68..3b2770e 100644
--- a/src/std/str.c
+++ b/src/std/str.c
@@ -1,4 +1,9 @@
 #include "str.h"
+#include <string.h>
+
+#include "mem.h"
+
+str8 str8_create(u8* buf, size_t len) { return (str8){ .buf = buf, .len = len }; }
 
 bool str8_equals(str8 a, str8 b) {
   if (a.len != b.len) {
@@ -11,4 +16,29 @@ bool str8_equals(str8 a, str8 b) {
     }
   }
   return true;
+}
+
+char* str8_to_cstr(arena* a, str8 s) {
+  bool is_null_terminated = s.buf[s.len - 1] == 0;
+  size_t n_bytes = is_null_terminated ? s.len : s.len + 1;
+
+  u8* dest = arena_alloc(a, n_bytes);
+
+  memcpy(dest, s.buf, s.len);
+  if (is_null_terminated) {
+    dest[s.len] = '\0';
+  }
+  return (char*)dest;
+}
+
+str8 str8_concat(arena* a, str8 left, str8 right) {
+  size_t n_bytes = left.len + right.len + 1;
+
+  u8* dest = arena_alloc(a, n_bytes);
+  memcpy(dest, left.buf, left.len);
+  memcpy(dest + right.len, right.buf, right.len);
+
+  dest[n_bytes - 1] = '\0';
+
+  return str8_create(dest, n_bytes);
 }
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