--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dyncall/dyncall_aggregate.h	Thu Apr 21 13:35:47 2022 +0200
@@ -0,0 +1,72 @@
+/*
+
+ Package: dyncall
+ Library: dyncall
+ File: dyncall/dyncall_aggregate.h
+ Description: C interface to compute struct size
+ License:
+
+   Copyright (c) 2021-2022 Tassilo Philipp <tphilipp@potion-studios.com>
+
+   Permission to use, copy, modify, and distribute this software for any
+   purpose with or without fee is hereby granted, provided that the above
+   copyright notice and this permission notice appear in all copies.
+
+   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+   WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+   MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+   ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+*/
+
+
+#ifndef DYNCALL_STRUCT_H
+#define DYNCALL_STRUCT_H
+
+#include "dyncall.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+#if defined(DC_UNIX) && defined(DC__Arch_AMD64)
+
+/* x64 param classification - only used for aggregates, so comments might be aggregate specific */
+#  define DC_SYSV_MAX_NUM_CLASSES 8  /* max num of aggregate qwords to be classified; constant defined by call conv */
+#  define SYSVC_NONE             0  /* end of classification !code relies on this being 0! */
+#  define SYSVC_INTEGER      (1<<0) /* (signed and unsigned) _Bool/bool, char, short, int, long, long long and pointers (also __int128, but treated as two longs) */
+#  define SYSVC_SSE          (1<<1) /* float, double and __m64, as well as least significant half of __float128 and __m128 (also complex float/double, but treated as two float/double) */
+#  define SYSVC_SSEUP        (1<<2) /* @@@AGGR currently unsupported/unused: most significant half of __float128 and __m128, most significant parts of __m256 and __m512 */
+#  define SYSVC_X87          (1<<3) /* @@@AGGR currently unsupported/unused: 64bit mantissa of type long double (80bit x87 extended precision format) */
+#  define SYSVC_X87UP        (1<<4) /* @@@AGGR currently unsupported/unused: 16bit exponent plus 6 bytes of padding of type long double (80bit x87 extended precision format) */
+#  define SYSVC_COMPLEX_X87  (1<<5) /* @@@AGGR currently unsupported/unused: complex long double */
+#  define SYSVC_MEMORY       (1<<6) /* for everything not fitting or allowed in regs given call conv (if class[0] == SYSVC_MEMORY, shortcut to pass entire aggregate via memory) */
+
+#endif
+
+
+typedef struct DCfield_ {
+	DCsize offset, size, array_len;
+	DCsigchar type;
+	const DCaggr* sub_aggr;
+} DCfield;
+
+struct DCaggr_ {
+	DCsize size, n_fields;
+#if defined(DC_UNIX) && defined(DC__Arch_AMD64)
+	DCuchar sysv_classes[DC_SYSV_MAX_NUM_CLASSES]; /* !code relies on this to be 64 bits! */
+#endif
+	DCfield fields[];
+};
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DYNCALL_H */
+