adding external append to handle header - single function

diff --git a/source/ext_appendtohandle.h b/source/ext_appendtohandle.h
new file mode 100644 (file)
index 0000000..b386545
--- /dev/null
+++ b/source/ext_appendtohandle.h
@@ -0,0 +1,30 @@
+// ext_appendtohandle.h
+//
+// Created by Jeff Lubow on 5/31/23
+// code from Jeremy Bernstein (c74) 
+
+#ifndef ext_appendtohandle_h
+#define ext_appendtohandle_h
+
+t_max_err my_sysmem_appendtextptrtohand(char *text, t_handle h)
+{
+       t_ptr_size i, oldsize, size;
+       char fudge = 0;
+       t_max_err rv = -1;
+       char *dst;
+
+       if (text && h) {
+               size = strlen(text) + 1;        // ensure zero termination
+               oldsize = sysmem_handlesize(h);
+               if (oldsize && !(*h)[oldsize - 1])
+                       fudge = 1;
+               if (!(rv = sysmem_resizehandle(h, oldsize + size - fudge))) {
+                       dst = (*h) + oldsize - fudge;
+                       for (i = 0; i < size; i++, dst++)
+                               *dst = text[i];
+               }
+       }
+       return rv;
+}
+
+#endif /* ext_appendtohandle_h */