From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Wed, 6 Jul 2022 00:01:01 +0000 (+1000)
Subject: fix vararg usae; use static callbacks
X-Git-Url: https://git.rrq.au/?a=commitdiff_plain;h=e47e7f1e366224e9e514e28f172afa65c732db21;p=rrq%2Frrqmisc.git

fix vararg usae; use static callbacks
---

diff --git a/vector/tupleitem.c b/vector/tupleitem.c
index ce5c713..14c3b3b 100644
--- a/vector/tupleitem.c
+++ b/vector/tupleitem.c
@@ -5,7 +5,24 @@
 
 #define COLUMN def->columns
 
-unsigned long tupleitem_hashcode(itemkeyfun *this,void *key) {
+/**
+ * This callback function returns the hashcode of a key.
+ *
+ * \param this is a pointer to the itemkeyfun record from where this
+ * callback got invoked
+ *
+ * \param key is the key to produce a hascode for
+ *
+ * \returns the hashcode which is a vector_index (i.e. unsigned long)
+ *
+ * The hashcode is used for indexing into the backing vector for
+ * finding the an item via its key. The same key must map consistently
+ * to the same hashcode while the hashtable contains an item with that
+ * key. Different keys map map to the same hashcode, in which case the
+ * vector placement is made at the first empty or hole slot following
+ * the hashcode index.
+ */
+static unsigned long tupleitem_hashcode(itemkeyfun *this,void *key) {
     tupleschema *def = (tupleschema *) this;
     tuple *kp = (tuple*) key;
     int i = 0;
@@ -23,7 +40,7 @@ unsigned long tupleitem_hashcode(itemkeyfun *this,void *key) {
  * This callback function determines whether an item has a
  * given key or not.
  */
-int tupleitem_haskey(itemkeyfun *this,void *item,void *key) {
+static int tupleitem_haskey(itemkeyfun *this,void *item,void *key) {
     tupleschema *def = (tupleschema *) this;
     tuple *kp = (tuple*) key;
     tuple *tp = (tuple*) item;
@@ -42,7 +59,7 @@ int tupleitem_haskey(itemkeyfun *this,void *item,void *key) {
  * This callback function returns the key of an item by considering
  * the arity and mask.
  */
-void *tupleitem_itemkey(itemkeyfun *this,void *item) {
+static void *tupleitem_itemkey(itemkeyfun *this,void *item) {
     tupleschema *def = (tupleschema *) this;
     tuple *tp = (tuple*) item;
     int i, j;
@@ -65,7 +82,7 @@ void *tupleitem_itemkey(itemkeyfun *this,void *item) {
  * This callback function handles a key obtained from the itemkey
  * callback function to reclaim temporary allocation.
  */
-void tupleitem_releasekey(itemkeyfun *this,void *key) {
+static void tupleitem_releasekey(itemkeyfun *this,void *key) {
     tupleschema *def = (tupleschema *) this;
     tuple *kp = (tuple*) key;
     int i,j;
@@ -82,9 +99,11 @@ tuple *tuple_create(int arity,...) {
     va_list ap;
     int i;
     tuple *t = (tuple *)malloc( arity * sizeof( void* ) );
+    va_start( ap, arity );
     for ( i = 0; i < arity; i++ ) {
 	(*t)[i] = va_arg( ap, void* );
     }
+    va_end( ap );
     return t;
 }
 
@@ -112,6 +131,7 @@ tupleschema *tupleschema_mask(tupleschema *schema,...) {
     masked->columns = COPYA( itemkeyfun*, schema->columns, schema->arity );
     va_list ap;
     int i;
+    va_start( ap, schema );
     for ( ;; ) {
 	i = va_arg( ap, int );
 	if ( i < 0 || i >= schema->arity ) {
@@ -119,5 +139,17 @@ tupleschema *tupleschema_mask(tupleschema *schema,...) {
 	}
 	masked->columns[i] = 0;
     };
+    va_end( ap );
     return masked;
 }
+
+unsigned long tuple_mask(int arity,tuple *t) {
+    unsigned long mask = 0;
+    while ( arity-- > 0 ) {
+	mask <<= 1;
+	if ( (*t)[ arity ] ) {
+	    mask++;
+	}
+    }
+    return mask;
+}
diff --git a/vector/tupleitem.h b/vector/tupleitem.h
index 37d5e24..5956668 100644
--- a/vector/tupleitem.h
+++ b/vector/tupleitem.h
@@ -36,43 +36,6 @@ typedef struct {
     itemkeyfun **columns;
 } tupleschema;
 
-/**
- * This callback function returns the hashcode of a key.
- *
- * \param this is a pointer to the itemkeyfun record from where this
- * callback got invoked
- *
- * \param key is the key to produce a hascode for
- *
- * \returns the hashcode which is a vector_index (i.e. unsigned long)
- *
- * The hashcode is used for indexing into the backing vector for
- * finding the an item via its key. The same key must map consistently
- * to the same hashcode while the hashtable contains an item with that
- * key. Different keys map map to the same hashcode, in which case the
- * vector placement is made at the first empty or hole slot following
- * the hashcode index.
- */
-extern unsigned long tupleitem_hashcode(itemkeyfun *this,void *key);
-
-/**
- * This callback function determines whether an item has a
- * given key or not.
- */
-extern int tupleitem_haskey(itemkeyfun *this,void *item,void *key);
-
-/**
- * This callback function returns the key of an item by considering
- * the arity and schema.
- */
-extern void *tupleitem_itemkey(itemkeyfun *this,void *item);
-
-/**
- * This callback function handles a key obtained from the itemkey
- * callback function to reclaim temporary allocation.
- */
-extern void tupleitem_releasekey(itemkeyfun *this,void *key);
-
 /**
  * Create a tuples with given values.
  */