creating and removing buffer

1 files changed, 19 insertions, 6 deletions

diff --git a/src/common.cc b/src/common.cc
index 141b079..df8b9aa 100644
--- a/src/common.cc
+++ b/src/common.cc
@@ -5,6 +5,7 @@
 #include <cstdint>
 #include <cstdio>
 #include <cstdlib>
+#include <cstring>
 
 /* typedefs for common types */
 
@@ -55,8 +56,9 @@ struct Slice {
   T* ptr;
   usize length;
 
-  Slice() : ptr(nullptr), length(0) {}
+  Slice() : Slice(nullptr, 0) {}
   Slice(T* ptr, usize length) : ptr(ptr), length(length) {}
+  Slice(const char* str) : ptr((u8*)str), length(strlen(str)) {}
 
   T* operator[](usize index) {
     assert(index < this->length);
@@ -86,14 +88,10 @@ struct Link {
   Link* next;
   Link* prev;
 
+  Link() : Link(nullptr, nullptr) {}
   Link(Link* next, Link* prev) : next(next), prev(prev) {}
 };
 
-struct List {
-  Link head;
-  Link tail;
-};
-
 static inline void link_after(Link* prev, Link* nlink) {
   assert(prev != nullptr);
   assert(nlink != nullptr);
@@ -108,4 +106,19 @@ static inline void link_after(Link* prev, Link* nlink) {
   next->prev = nlink;
 }
 
+static inline void link_remove(Link* item) {
+  assert(item != nullptr);
+
+  Link* prev = item->prev;
+  Link* next = item->next;
+
+  if(prev != nullptr)
+    prev->next = next;
+
+  if(next != nullptr)
+    next->prev = prev; 
+
+  item->prev = item->next = nullptr;
+}
+
 #endif