Basic type safe print

programs/os_windows.kl

@@ -45,7 +45,7 @@ release :: (m: *Memory)
     m.commit  = 0
     m.reserve = 0
 
-print :: (string: String16)
+write_console :: (string: String16)
   handle := GetStdHandle(STD_OUTPUT_HANDLE)
   WriteConsoleW(handle, string.str->*void, string.len->DWORD, 0, 0)
 
@@ -61,3 +61,55 @@ time :: (): F64
   assert(err != 0)
   result := query->F64 / performance_frequency
   return result
+
+/**
+ * C++ version 0.4 char* style "itoa":
+ * Written by Lukás Chmela
+ * Released under GPLv3.
+ */
+itoa :: (value: S64, result: *U8, base: S64): *U8
+    // check that the base if valid
+    if (base < 2) || (base > 36)
+      *result = 0 // '
+      return result
+
+    ptr := result
+    ptr1 := result
+    tmp_char: U8
+    tmp_value: S64
+
+    for value != 0
+      tmp_value = value
+      value /= base
+      *ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)]
+
+    // Apply negative sign
+    if tmp_value < 0
+      *ptr++ = '- // '
+    *ptr-- = 0
+    for ptr1 < ptr
+      tmp_char = *ptr
+      *ptr-- = *ptr1
+      *ptr1++ = tmp_char
+    return result
+
+
+print :: (string: String, args: ..)
+  buffer: [1024]U8
+  buffer_len: S64
+
+  arg_counter := 0
+  for i := 0, i < length_of(string), i+=1
+    if string[i] == '% // '
+      assert(arg_counter < length_of(args), "Passing too many [%] to a print lambda")
+      arg := args[arg_counter++]
+
+      if arg.type == S64
+        value := *(arg.data->*S64)
+        itoa_buff: [64]U8
+        p := itoa(value, &itoa_buff[0], 10)
+        for *p != 0
+          buffer[buffer_len++] = *p++
+      else;; assert(false)
+    else
+      buffer[buffer_len++] = string[i]