From 818712d067201bf989c21218482914b23c74b644 Mon Sep 17 00:00:00 2001
From: leitner <leitner>
Date: Tue, 14 Jul 2020 19:46:35 +0000
Subject: [PATCH] add fmt_copybytes_sizeof_minus1

---
 fmt.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fmt.h b/fmt.h
index 989acd2..9b259d0 100644
--- a/fmt.h
+++ b/fmt.h
@@ -124,6 +124,16 @@ static inline size_t fmt_copybytes(char* dest,const char* src,size_t n) {
   return n;
 }
 
+/* copy sizeof(src)-1 bytes from src to dest, return sizeof(src)-1 */
+/* this is for
+ *   fmt_copybytes_sizeof_minus1(dest, "\x01\x02\x03\x04");
+ * since we are technically passing a string, sizeof will include the
+ * finishing 0 byte which we neither need nor want */
+static inline size_t fmt_copybytes_sizeof_minus1(char* dest,const char* src) {
+  byte_copy(dest,sizeof(src)-1,src);
+  return sizeof(src)-1;
+}
+
 /* "foo" -> "  foo"
  * write padlen-srclen spaces, if that is >= 0.  Then copy srclen
  * characters from src.  Truncate only if total length is larger than