From 57d67eb910aa765df2495df9f625bfc00436014b Mon Sep 17 00:00:00 2001
From: ame <amelia@amyy.cc>
Date: Wed, 27 Mar 2024 13:34:34 -0500
Subject: fixed a few hashes

---
 src/hash/bsdchecksum.c | 50 ++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 38 insertions(+), 12 deletions(-)

(limited to 'src/hash/bsdchecksum.c')

diff --git a/src/hash/bsdchecksum.c b/src/hash/bsdchecksum.c
index 9904352..a816b5c 100644
--- a/src/hash/bsdchecksum.c
+++ b/src/hash/bsdchecksum.c
@@ -2,26 +2,52 @@
 #include <stdio.h>
 #include <stdint.h>
 
-uint16_t i_bsdchecksum(uint8_t *aa, size_t len){
-    uint16_t check = 0x0;
-    
-    for(int i = 0; i != len; i++){
-        uint8_t a = aa[i];
-        check = (check >> 1) + ((check & 1) << 15);
-        check += a;
-        check &= 0xffff;
-    }
-    return check;
+struct bsdchecksum_hash bsdchecksum_init(){
+  return (struct bsdchecksum_hash){.check = 0x0};
+}
+
+void bsdchecksum_update(uint8_t* aa, size_t len, struct bsdchecksum_hash* hash){
+  for(int i = 0; i != len; i++){
+      uint8_t a = aa[i];
+      hash->check = (hash->check >> 1) + ((hash->check & 1) << 15);
+      hash->check += a;
+      hash->check &= 0xffff;
+  }
+}
+
+uint16_t bsdchecksum_final(struct bsdchecksum_hash* hash){
+  return hash->check;
+}
+
+uint16_t bsdchecksum(uint8_t* a, size_t len){
+  struct bsdchecksum_hash b = bsdchecksum_init();
+  bsdchecksum_update(a, len, &b);
+  return bsdchecksum_final(&b);
+}
+
+common_hash_init_update(bsdchecksum);
+
+int l_bsdchecksum_final(lua_State* L){
+  lua_pushstring(L, "ud");
+  lua_gettable(L, 1);
+
+  struct bsdchecksum_hash* a = (struct bsdchecksum_hash*)lua_touserdata(L, -1);
+  uint32_t u = bsdchecksum_final(a);
+  char digest[32];
+  sprintf(digest,"%i",u);
+  lua_pushstring(L, digest);
+  return 1;
 }
 
 int l_bsdchecksum(lua_State* L){
-  
+  if(lua_gettop(L) == 0) return l_bsdchecksum_init(L);
   size_t len = 0;
   uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
   
   char digest[16];
 
-  uint16_t u = i_bsdchecksum(a, len);
+  //uint16_t u = i_bsdchecksum(a, len);
+  uint16_t u = bsdchecksum(a, len);
   sprintf(digest,"%i",u);
   lua_pushstring(L, digest);
 
-- 
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