From e8016325866fb989936019e0ab3aae49afc5f594 Mon Sep 17 00:00:00 2001
From: Angelo Haller <angelo@szanni.org>
Date: Fri, 18 Nov 2022 16:17:31 -0500
Subject: [PATCH] Add MSVC support.

MSVC does not support `__attribute__ ((__packed__))`. Add support
via `__pragma(pack(push, 1))` when compiling with MSVC.
---
 sds.h | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/sds.h b/sds.h
index adcc12c..fc862f7 100644
--- a/sds.h
+++ b/sds.h
@@ -42,37 +42,48 @@ extern const char *SDS_NOINIT;
 
 typedef char *sds;
 
+#ifdef _MSC_VER
+__pragma(pack(push, 1))
+#define _SDS_PACKED
+#else
+#define _SDS_PACKED __attribute__ ((__packed__))
+#endif
+
 /* Note: sdshdr5 is never used, we just access the flags byte directly.
  * However is here to document the layout of type 5 SDS strings. */
-struct __attribute__ ((__packed__)) sdshdr5 {
+struct _SDS_PACKED sdshdr5 {
     unsigned char flags; /* 3 lsb of type, and 5 msb of string length */
     char buf[];
 };
-struct __attribute__ ((__packed__)) sdshdr8 {
+struct _SDS_PACKED sdshdr8 {
     uint8_t len; /* used */
     uint8_t alloc; /* excluding the header and null terminator */
     unsigned char flags; /* 3 lsb of type, 5 unused bits */
     char buf[];
 };
-struct __attribute__ ((__packed__)) sdshdr16 {
+struct _SDS_PACKED sdshdr16 {
     uint16_t len; /* used */
     uint16_t alloc; /* excluding the header and null terminator */
     unsigned char flags; /* 3 lsb of type, 5 unused bits */
     char buf[];
 };
-struct __attribute__ ((__packed__)) sdshdr32 {
+struct _SDS_PACKED sdshdr32 {
     uint32_t len; /* used */
     uint32_t alloc; /* excluding the header and null terminator */
     unsigned char flags; /* 3 lsb of type, 5 unused bits */
     char buf[];
 };
-struct __attribute__ ((__packed__)) sdshdr64 {
+struct _SDS_PACKED sdshdr64 {
     uint64_t len; /* used */
     uint64_t alloc; /* excluding the header and null terminator */
     unsigned char flags; /* 3 lsb of type, 5 unused bits */
     char buf[];
 };
 
+#ifdef _MSC_VER
+__pragma(pack(pop))
+#endif
+
 #define SDS_TYPE_5  0
 #define SDS_TYPE_8  1
 #define SDS_TYPE_16 2