From 228dea2e740b87452f4c70096694b8b94afd5065 Mon Sep 17 00:00:00 2001
From: Shoaib Ahmed <sufialhussaini@gmail.com>
Date: Sun, 2 Jun 2019 16:53:39 +0200
Subject: [PATCH 1/2] Add sdsnewbin() function

---
 sds.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/sds.c b/sds.c
index 39ad595..447a932 100644
--- a/sds.c
+++ b/sds.c
@@ -156,6 +156,28 @@ sds sdsnew(const char *init) {
     return sdsnewlen(init, initlen);
 }
 
+/* Create a new binary sds from hexadecimal string representation.
+ * hexstr MUST be NULL terminated, of even length, with lower-case hex 
+ * letters and may begin with '0x' */
+sds sdsnewbin(const char* hexstr) {
+  size_t sz = strlen(hexstr);
+  if (sz % 2) return NULL;
+  sds         val = sdsnewlen(SDS_NOINIT, sz / 2);
+  const char* pos = hexstr;
+  if (pos[0] == '0' && pos[1] == 'x') {
+    pos += 2;
+    sz -= 2;
+  }
+  for (size_t i = 0; i < sz / 2; i++) {
+    if (sscanf(pos, "%2hhx", &val[i]) != 1) {
+      sdsfree(val);
+      return NULL;
+    }
+    pos += 2;
+  }
+  return val;
+}
+
 /* Duplicate an sds string. */
 sds sdsdup(const sds s) {
     return sdsnewlen(s, sdslen(s));

From 1f780695aa22b04c36dd986818a6b11914236113 Mon Sep 17 00:00:00 2001
From: Shoaib Ahmed <sufialhussaini@gmail.com>
Date: Sun, 2 Jun 2019 16:54:39 +0200
Subject: [PATCH 2/2] Update header to add sdsnewbin()

---
 sds.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sds.h b/sds.h
index 1bdb60d..087d5bf 100644
--- a/sds.h
+++ b/sds.h
@@ -218,6 +218,7 @@ static inline void sdssetalloc(sds s, size_t newlen) {
 sds sdsnewlen(const void *init, size_t initlen);
 sds sdsnew(const char *init);
 sds sdsempty(void);
+sds sdsnewbin(const char* hexstr);
 sds sdsdup(const sds s);
 void sdsfree(sds s);
 sds sdsgrowzero(sds s, size_t len);