1 files changed, 116 insertions, 0 deletions
diff --git a/ext/json/json.h b/ext/json/json.h
new file mode 100644
index 0000000000..8737989a6c
--- /dev/null
+++ b/ext/json/json.h
@@ -0,0 +1,116 @@
+#ifndef _JSON_H_
+#define _JSON_H_
+
+#include "ruby.h"
+#include "ruby/encoding.h"
+#include <stdint.h>
+
+#ifndef RBIMPL_ASSERT_OR_ASSUME
+# define RBIMPL_ASSERT_OR_ASSUME(x)
+#endif
+
+#if defined(RUBY_DEBUG) && RUBY_DEBUG
+# define JSON_ASSERT RUBY_ASSERT
+#else
+# ifdef JSON_DEBUG
+#  include <assert.h>
+#  define JSON_ASSERT(x) assert(x)
+# else
+#  define JSON_ASSERT(x)
+# endif
+#endif
+
+/* shims */
+
+#if SIZEOF_UINT64_T == SIZEOF_LONG_LONG
+# define INT64T2NUM(x) LL2NUM(x)
+# define UINT64T2NUM(x) ULL2NUM(x)
+#elif SIZEOF_UINT64_T == SIZEOF_LONG
+# define INT64T2NUM(x) LONG2NUM(x)
+# define UINT64T2NUM(x) ULONG2NUM(x)
+#else
+# error No uint64_t conversion
+#endif
+
+/* This is the fallback definition from Ruby 3.4 */
+#ifndef RBIMPL_STDBOOL_H
+#if defined(__cplusplus)
+# if defined(HAVE_STDBOOL_H) && (__cplusplus >= 201103L)
+#  include <cstdbool>
+# endif
+#elif defined(HAVE_STDBOOL_H)
+# include <stdbool.h>
+#elif !defined(HAVE__BOOL)
+typedef unsigned char _Bool;
+# define bool  _Bool
+# define true  ((_Bool)+1)
+# define false ((_Bool)+0)
+# define __bool_true_false_are_defined
+#endif
+#endif
+
+#ifndef HAVE_RB_EXT_RACTOR_SAFE
+#   undef RUBY_TYPED_FROZEN_SHAREABLE
+#   define RUBY_TYPED_FROZEN_SHAREABLE 0
+#endif
+
+#ifdef RUBY_TYPED_EMBEDDABLE
+#  define HAVE_RUBY_TYPED_EMBEDDABLE 1
+#else
+# ifdef HAVE_CONST_RUBY_TYPED_EMBEDDABLE
+#  define RUBY_TYPED_EMBEDDABLE RUBY_TYPED_EMBEDDABLE
+#  define HAVE_RUBY_TYPED_EMBEDDABLE 1
+# else
+#  define RUBY_TYPED_EMBEDDABLE 0
+# endif
+#endif
+
+#ifndef NORETURN
+#if defined(__has_attribute) && __has_attribute(noreturn)
+#define NORETURN(x) __attribute__((noreturn)) x
+#else
+#define NORETURN(x) x
+#endif
+#endif
+
+#ifndef NOINLINE
+#if defined(__has_attribute) && __has_attribute(noinline)
+#define NOINLINE(x) __attribute__((noinline)) x
+#else
+#define NOINLINE(x) x
+#endif
+#endif
+
+#ifndef ALWAYS_INLINE
+#if defined(__has_attribute) && __has_attribute(always_inline)
+#define ALWAYS_INLINE(x) inline __attribute__((always_inline)) x
+#else
+#define ALWAYS_INLINE(x) inline x
+#endif
+#endif
+
+#ifndef RB_UNLIKELY
+#define RB_UNLIKELY(expr) expr
+#endif
+
+#ifndef RB_LIKELY
+#define RB_LIKELY(expr) expr
+#endif
+
+#ifndef MAYBE_UNUSED
+# define MAYBE_UNUSED(x) x
+#endif
+
+#ifdef RUBY_DEBUG
+#ifndef JSON_DEBUG
+#define JSON_DEBUG RUBY_DEBUG
+#endif
+#endif
+
+#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && INTPTR_MAX == INT64_MAX
+#define JSON_CPU_LITTLE_ENDIAN_64BITS 1
+#else
+#define JSON_CPU_LITTLE_ENDIAN_64BITS 0
+#endif
+
+#endif // _JSON_H_