symbols: move keysyms into LevelInfo

Instead of maintaining a syms array in the GroupInfo + sym_index's in
the levels. This simplifies the code somewhat.
In order not to alloc for every level instead of every group, we only do
it if the level has more than one keysym (with a union). Since for now
this is a special case, it actually works out better memory-wise.

Signed-off-by: Ran Benita <ran234@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/utils.h b/src/utils.h
index 9f0505c..55ff61c 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -82,6 +82,15 @@ strnull(const char *s)
     return s ? s : "(null)";
 }
 
+static inline void *
+memdup(const void *mem, size_t nmemb, size_t size)
+{
+    void *p = malloc(nmemb * size);
+    if (p)
+        memcpy(p, mem, nmemb * size);
+    return p;
+}
+
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define MIN3(a, b, c) MIN(MIN((a), (b)), (c))
 #define MAX(a, b) ((a) > (b) ? (a) : (b))