Add rtems_assoc_32_to_string()

1 files changed, 61 insertions, 0 deletions

diff --git a/cpukit/libcsupport/src/assoc32tostring.c b/cpukit/libcsupport/src/assoc32tostring.c
new file mode 100644
index 0000000000..31b08857d3
--- /dev/null
+++ b/cpukit/libcsupport/src/assoc32tostring.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016 embedded brains GmbH.
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/assoc.h>
+
+#include <stdbool.h>
+#include <string.h>
+
+static size_t space( size_t buffer_size, size_t len )
+{
+  if ( len < buffer_size ) {
+    return buffer_size - len;
+  } else {
+    return 0;
+  }
+}
+
+size_t rtems_assoc_32_to_string(
+  uint32_t                   value,
+  char                      *buffer,
+  size_t                     buffer_size,
+  const rtems_assoc_32_pair *pairs,
+  size_t                     pair_count,
+  const char                *separator,
+  const char                *fallback
+)
+{
+  size_t len;
+  size_t i;
+
+  len = 0;
+
+  for ( i = 0; i < pair_count ; ++i ) {
+    const rtems_assoc_32_pair *p;
+
+    p = &pairs[ i ];
+
+    if ( ( value & p->bits ) != 0 ) {
+      if ( len > 0 ) {
+        len += strlcpy( &buffer[ len ], separator, space( buffer_size, len ) );
+      }
+
+      len += strlcpy( &buffer[ len ], p->name, space( buffer_size, len ) );
+    }
+  }
+
+  if ( len == 0 ) {
+    len += strlcpy( buffer, fallback, buffer_size );
+  }
+
+  return len;
+}