X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/agedu/blobdiff_plain/38d8173dface29a968898430fbc9db618204bf50..c1065ef6db11830ffb544b5ffabe6af3e59688f6:/index.c

diff --git a/index.c b/index.c
index c42da39..a74c165 100644
--- a/index.c
+++ b/index.c
@@ -9,9 +9,6 @@
 
 #define alignof(typ) ( offsetof(struct { char c; typ t; }, t) )
 
-#define min(x,y) ((x)<(y) ? (x):(y))
-#define max(x,y) ((x)>(y) ? (x):(y))
-
 #define PADDING(x, mod) ( ((mod) - ((x) % (mod))) % (mod) )
 
 struct avlnode {
@@ -52,7 +49,7 @@ static int index_maxdepth(int nodecount)
 off_t index_initial_size(off_t currentsize, int nodecount)
 {
     currentsize += PADDING(currentsize, alignof(off_t));
-    currentsize += nodecount + sizeof(off_t);
+    currentsize += nodecount * sizeof(off_t);
     currentsize += PADDING(currentsize, alignof(struct avlnode));
 
     return currentsize;
@@ -286,6 +283,19 @@ void indexbuild_free(indexbuild *ib)
     sfree(ib);
 }
 
+int index_has_root(const void *t, int n)
+{
+    const off_t *roots;
+
+    roots = (const off_t *)((const char *)t + trie_get_index_offset(t));
+
+    if (n == 0)
+	return 1;
+    if (n < 0 || n >= trie_count(t) || !roots[n-1])
+	return 0;
+    return 1;
+}
+
 unsigned long long index_query(const void *t, int n, unsigned long long at)
 {
     const off_t *roots;