* add method to tell if a string is a biniplist

[lcore.git] / binipstuff.pas

diff --git a/binipstuff.pas b/binipstuff.pas
index 0c23533a51183cf441cce26f9bbdc1e016538b4d..59d123b4a59730e81513795928dcbf873c2bbf47 100755 (executable)
--- a/binipstuff.pas
+++ b/binipstuff.pas
@@ -124,6 +124,7 @@ procedure biniplist_setcount(var l:tbiniplist;newlen:integer);
 procedure biniplist_free(var l:tbiniplist);\r
 procedure biniplist_addlist(var l:tbiniplist;const l2:tbiniplist);\r
 function biniplist_tostr(const l:tbiniplist):string;\r
+function isbiniplist(const l:tbiniplist):boolean;\r
 \r
 function htons(w:word):word;\r
 function htonl(i:uint32):uint32;\r
@@ -512,11 +513,15 @@ begin
   {$endif}\r
 end;\r
 \r
-{------------------------------------------------------------------------------}\r
+{-----------biniplist stuff--------------------------------------------------}\r
+\r
+const\r
+  biniplist_prefix='bipl'#0;\r
+  biniplist_prefixlen=length(biniplist_prefix);\r
 \r
 function biniplist_new:tbiniplist;\r
 begin\r
-  result := '';\r
+  result := biniplist_prefix;\r
 end;\r
 \r
 procedure biniplist_add(var l:tbiniplist;ip:tbinip);\r
@@ -530,7 +535,7 @@ end;
 \r
 function biniplist_getcount(const l:tbiniplist):integer;\r
 begin\r
-  result := length(l) div sizeof(tbinip);\r
+  result := (length(l)-biniplist_prefixlen) div sizeof(tbinip);\r
 end;\r
 \r
 function biniplist_get(const l:tbiniplist;index:integer):tbinip;\r
@@ -539,18 +544,18 @@ begin
     fillchar(result,sizeof(result),0);\r
     exit;\r
   end;\r
-  move(l[index*sizeof(tbinip)+1],result,sizeof(result));\r
+  move(l[index*sizeof(tbinip)+1+biniplist_prefixlen],result,sizeof(result));\r
 end;\r
 \r
 procedure biniplist_set(var l:tbiniplist;index:integer;ip:tbinip);\r
 begin\r
   uniquestring(l);\r
-  move(ip,l[index*sizeof(tbinip)+1],sizeof(ip));\r
+  move(ip,l[index*sizeof(tbinip)+1+biniplist_prefixlen],sizeof(ip));\r
 end;\r
 \r
 procedure biniplist_setcount(var l:tbiniplist;newlen:integer);\r
 begin\r
-  setlength(l,sizeof(tbinip)*newlen);\r
+  setlength(l,(sizeof(tbinip)*newlen)+biniplist_prefixlen);\r
 end;\r
 \r
 procedure biniplist_free(var l:tbiniplist);\r
@@ -575,4 +580,17 @@ begin
   result := result + ')';\r
 end;\r
 \r
+function isbiniplist(const l:tbiniplist):boolean;\r
+var\r
+  i : integer;\r
+begin\r
+  for i := 1 to biniplist_prefixlen do begin\r
+    if biniplist_prefix[i] <> l[i] then begin\r
+      result := false;\r
+      exit;\r
+    end;\r
+  end;\r
+  result := true;\r
+end;\r
+\r
 end.\r