add vstrcat

1 files changed, 15 insertions, 0 deletions

diff --git a/snag/util.c b/snag/util.c
new file mode 100644
index 0000000..c4137f6
--- /dev/null
+++ b/snag/util.c
@@ -0,0 +1,15 @@
+#include <stdarg.h>
+#include <string.h>
+
+void vstrcat_(char* dest, ...) {
+    va_list args;
+    va_start(args, dest);
+    while (1) {
+        char* arg = va_arg(args, char*);
+        if (!arg) break;
+        memcpy(dest, arg, strlen(arg));
+        dest += strlen(arg);
+    }
+    va_end(args);
+    *dest = 0;
+}