posix: (POSIX profile) bind va_list and add string.concatwip/mickey/posix-profile

This fixes string templates when using the POSIX profile

1 files changed, 26 insertions, 0 deletions

diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 0bfc879d8..0c1397bd8 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -131,6 +131,17 @@ public struct ssize_t {
 	}
 }
 
+[SimpleType]
+[CCode (cheader_filename = "stdarg.h", cprefix = "va_", has_type_id = false, destroy_function = "va_end", lvalue_access = false)]
+public struct va_list {
+        [CCode (cname = "va_start")]
+        public va_list ();
+        [CCode (cname = "va_copy")]
+        public va_list.copy (va_list src);
+        [CCode (generic_type_pos = 1.1, simple_generics = true)]
+        public unowned G arg<G> ();
+}
+
 [CCode (cname = "int8_t", cheader_filename = "stdint.h", default_value = "0")]
 [IntegerType (rank = 1, min = -128, max = 127)]
 public struct int8 {
@@ -271,6 +282,21 @@ public class string {
 	[PrintfFormat]
 	public string printf (...);
 
+	public string concat (...) {
+		string result = this;
+		var l = va_list();
+		while (true) {
+			string? arg = l.arg();
+			if (arg == null) {
+				break;
+			}
+			else {
+				result = "%s%s".printf( result, arg );
+			}
+		}
+		return result;
+	}
+
 	public inline unowned string to_string () {
 		return this;
 	}