Move write procedures to the common module

source/common.elna

@@ -3,6 +3,8 @@
   obtain one at https://mozilla.org/MPL/2.0/. *)
 module;
 
+import cstring, cstdio;
+
 type
   Identifier = [256]Char;
   TextLocation* = record
@@ -10,4 +12,60 @@ type
     column: Word
   end;
 
+proc write*(fd: Int, buf: Pointer, Word: Int) -> Int; extern;
+
+proc write_s*(value: String);
+begin
+  write(1, cast(value.ptr: Pointer), cast(value.length: Int))
+end;
+
+proc write_z*(value: ^Char);
+begin
+  write(1, cast(value: Pointer), cast(strlen(value): Int))
+end;
+
+proc write_b*(value: Bool);
+begin
+  if value then
+    write_s("true")
+  else
+    write_s("false")
+  end
+end;
+
+proc write_c*(value: Char);
+begin
+  putchar(cast(value: Int));
+  fflush(nil)
+end;
+
+proc write_i*(value: Int);
+var
+  digit: Int;
+  n: Word;
+  buffer: [10]Char;
+begin
+  n := 10u;
+
+  if value = 0 then
+    write_c('0')
+  end;
+  while value <> 0 do
+    digit := value % 10;
+    value := value / 10;
+
+    buffer[n] := cast(cast('0': Int) + digit: Char);
+    n := n - 1u
+  end;
+  while n < 10u do
+    n := n + 1u;
+    write_c(buffer[n])
+  end
+end;
+
+proc write_u*(value: Word);
+begin
+  write_i(cast(value: Int))
+end;
+
 end.