diff --git a/src/base.h b/src/base.h
index 47a6eca..a64ab1f 100644
--- a/src/base.h
+++ b/src/base.h
@@ -1,4 +1,6 @@
-#pragma once
+#ifndef ORCA_BASE_H
+#define ORCA_BASE_H
+
 #include <stdio.h>
 #include <assert.h>
 #include <limits.h>
@@ -60,23 +62,27 @@
 
 #define staticni ORCA_NOINLINE static
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-//----------------------------------------------------------------------------------------
-// Types
-//----------------------------------------------------------------------------------------
-typedef uint8_t U8;
-typedef int8_t I8;
-typedef uint16_t U16;
-typedef int16_t I16;
-typedef uint32_t U32;
-typedef int32_t I32;
-typedef uint64_t U64;
-typedef int64_t I64;
-typedef size_t Usz;
-typedef ssize_t Isz;
-
-typedef char Glyph;
-typedef U8 Mark;
+
+    //----------------------------------------------------------------------------------------
+    // Types
+    //----------------------------------------------------------------------------------------
+    typedef uint8_t U8;
+    typedef int8_t I8;
+    typedef uint16_t U16;
+    typedef int16_t I16;
+    typedef uint32_t U32;
+    typedef int32_t I32;
+    typedef uint64_t U64;
+    typedef int64_t I64;
+    typedef size_t Usz;
+    typedef ssize_t Isz;
+
+    typedef char Glyph;
+    typedef U8 Mark;
 
 //----------------------------------------------------------------------------------------
 // Constants
@@ -84,91 +90,95 @@ typedef U8 Mark;
 #define ORCA_Y_MAX UINT16_MAX
 #define ORCA_X_MAX UINT16_MAX
 
-enum
-{
-    Hud_height = 2
-};
-
-
-
-
-//----------------------------------------------------------------------------------------
-// Utils
-//----------------------------------------------------------------------------------------
-
-ORCA_FORCEINLINE static Usz orca_round_up_power2(Usz x)
-{
-    assert(x <= SIZE_MAX / 2 + 1);
-    x -= 1;
-    x |= x >> 1;
-    x |= x >> 2;
-    x |= x >> 4;
-    x |= x >> 8;
-    x |= x >> 16;
+    enum
+    {
+        Hud_height = 2
+    };
+
+
+    //----------------------------------------------------------------------------------------
+    // Utils
+    //----------------------------------------------------------------------------------------
+
+    ORCA_FORCEINLINE static Usz orca_round_up_power2(Usz x)
+    {
+        assert(x <= SIZE_MAX / 2 + 1);
+        x -= 1;
+        x |= x >> 1;
+        x |= x >> 2;
+        x |= x >> 4;
+        x |= x >> 8;
+        x |= x >> 16;
 #if SIZE_MAX > UINT32_MAX
-    x |= x >> 32;
+        x |= x >> 32;
 #endif
-    return x + 1;
-}
+        return x + 1;
+    }
 
-ORCA_OK_IF_UNUSED
-static bool orca_is_valid_glyph(Glyph c)
-{
-    if (c >= '0' && c <= '9')
-        return true;
-    if (c >= 'A' && c <= 'Z')
-        return true;
-    if (c >= 'a' && c <= 'z')
-        return true;
-    switch (c) {
-        case '!':
-        case '#':
-        case '%':
-        case '*':
-        case '.':
-        case ':':
-        case ';':
-        case '=':
-        case '?':
+    ORCA_OK_IF_UNUSED
+    static bool orca_is_valid_glyph(Glyph c)
+    {
+        if (c >= '0' && c <= '9')
+            return true;
+        if (c >= 'A' && c <= 'Z')
             return true;
+        if (c >= 'a' && c <= 'z')
+            return true;
+        switch (c) {
+            case '!':
+            case '#':
+            case '%':
+            case '*':
+            case '.':
+            case ':':
+            case ';':
+            case '=':
+            case '?':
+                return true;
+        }
+        return false;
     }
-    return false;
-}
 
-static ORCA_FORCEINLINE double ms_to_sec(double ms)
-{
-    return ms / 1000.0;
-}
+    static ORCA_FORCEINLINE double ms_to_sec(double ms)
+    {
+        return ms / 1000.0;
+    }
 
 
-staticni bool str_to_int(char const *str, int *out)
-{
-    int a;
-    int res = sscanf(str, "%d", &a);
-    if (res != 1)
-        return false;
-    *out = a;
-    return true;
-}
-
-// Reads something like '5x3' or '5'. Writes the same value to both outputs if
-// only one is specified. Returns false on error.
-staticni bool read_nxn_or_n(char const *str, int *out_a, int *out_b)
-{
-    int a, b;
-    int res = sscanf(str, "%dx%d", &a, &b);
-    if (res == EOF)
-        return false;
-    if (res == 1) {
-        *out_a = a;
-        *out_b = a;
+    staticni bool str_to_int(char const *str, int *out)
+    {
+        int a;
+        int res = sscanf(str, "%d", &a);
+        if (res != 1)
+            return false;
+        *out = a;
         return true;
     }
-    if (res == 2) {
-        *out_a = a;
-        *out_b = b;
-        return true;
+
+    // Reads something like '5x3' or '5'. Writes the same value to both outputs if
+    // only one is specified. Returns false on error.
+    staticni bool read_nxn_or_n(char const *str, int *out_a, int *out_b)
+    {
+        int a, b;
+        int res = sscanf(str, "%dx%d", &a, &b);
+        if (res == EOF)
+            return false;
+        if (res == 1) {
+            *out_a = a;
+            *out_b = a;
+            return true;
+        }
+        if (res == 2) {
+            *out_a = a;
+            *out_b = b;
+            return true;
+        }
+        return false;
     }
-    return false;
-}
 
+#ifdef __cplusplus
+};
+#endif
+
+
+#endif //ORCA_BASE_H