From 8a9d5f6a0033b1c8999e528c52047e1947f3d3c9 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Sun, 10 Jan 2021 09:51:38 +0100
Subject: [PATCH] Add macro string_sets (like string_cats)

---
 README.md            | 5 +++++
 m-string.h           | 4 ++++
 tests/test-mstring.c | 2 ++
 3 files changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 91eb1a72..b86283d3 100644
--- a/README.md
+++ b/README.md
@@ -5020,6 +5020,11 @@ NOTE: v2 can also be a 'const char *' in C11.
 Append all the strings 'v2' ... to the string 'v'.
 NOTE: v2 can also be a 'const char *' in C11.
 
+##### void string\_sets(string\_t v, const string\_t v2[, ...] )
+
+Set the string 'v' to the concatenation of all the strings 'v2'
+NOTE: v2 can also be a 'const char *' in C11.
+
 ##### int string\_cmp\_str(const string\_t v1, const char str[])
 ##### int string\_cmp(const string\_t v1, const string\_t str)
 
diff --git a/m-string.h b/m-string.h
index 19ac40d5..6892d30b 100644
--- a/m-string.h
+++ b/m-string.h
@@ -1859,6 +1859,10 @@ namespace m_lib {
 #define string_cats(a, ...)                                                   \
   M_MAP2_C(string_cat, a, __VA_ARGS__)
 
+/* Set a string to a set strings (or const char * if C1)) */
+#define string_sets(a, ...)                                                   \
+  (string_clean(a), M_MAP2_C(string_cat, a, __VA_ARGS__) )
+
 /* Macro encapsulation for C11 */
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
 
diff --git a/tests/test-mstring.c b/tests/test-mstring.c
index 27155c39..77d20112 100644
--- a/tests/test-mstring.c
+++ b/tests/test-mstring.c
@@ -302,6 +302,8 @@ static void test0(void)
     string_set_str(s3, " world");
     string_cats(s1, s2, s3);
     assert (string_cmp_str (s1, "Hello world") == 0);
+    string_sets(s1, s2, s3);
+    assert (string_cmp_str (s1, "o world") == 0);
   }
   
   string_clear (s1);