shl: misc: add shl_dup() helper

shl_dup() duplicates a memory region similar to strdup() but without
reading the data length via strlen().

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

diff --git a/src/shl_misc.h b/src/shl_misc.h
index 9afd058..bf955d5 100644 (file)
--- a/src/shl_misc.h
+++ b/src/shl_misc.h
@@ -61,6 +61,22 @@ static inline int shl_strtou(const char *input, unsigned int *output)
        return 0;
 }
 
+static inline int shl_dup(void **out, const void *data, size_t size)
+{
+       void *cpy;
+
+       if (!data || !size)
+               return -EINVAL;
+
+       cpy = malloc(size);
+       if (!cpy)
+               return -ENOMEM;
+
+       memcpy(cpy, data, size);
+       *out = cpy;
+       return 0;
+}
+
 /* TODO: xkbcommon should provide these flags!
  * We currently copy them into each library API we use so we need  to keep
  * them in sync. Currently, they're used in uterm-input and tsm-vte. */