1 files changed, 59 insertions, 0 deletions
diff --git a/external/hash/ht_trace.h b/external/hash/ht_trace.h
new file mode 100644
index 0000000..63af4a8
--- /dev/null
+++ b/external/hash/ht_trace.h
@@ -0,0 +1,59 @@
+#ifndef HT_TRACE_H
+#define HT_TRACE_H
+
+#ifdef HT_TRACE_ON
+#ifndef HT_TRACE_OUT
+#define HT_TRACE_OUT stderr
+#endif
+
+#include <stdio.h>
+#define ht_trace(s) fprintf(HT_TRACE_OUT, "trace: %s\n", s)
+#define ht_tracei(s, i) fprintf(HT_TRACE_OUT, "trace: %s: %d\n", s, (int)i)
+#define ht_tracex(s, x) fprintf(HT_TRACE_OUT, "trace: %s: 0x%lx\n", s, (long)x)
+#define ht_traces(s, s2, len) fprintf(HT_TRACE_OUT, "trace: %s: %.*s\n", s, (int)len, s2)
+
+static void ht_trace_buckets(hash_table_t *ht, char *msg, int first, int count)
+{
+    int i, j, N, n;
+
+    n = ht->buckets;
+    N = n - 1;
+
+    if (count == 0) {
+        count = 32;
+    }
+    if (count > n) {
+        count = n;
+    }
+
+    first = first & N;
+    fprintf(HT_TRACE_OUT, "bucket trace: %s\n", msg);
+    if (n > count) {
+        n = count;
+    }
+    fprintf(HT_TRACE_OUT, "item count: %ld, bucket count %ld, utilization: %0.1f%%\n",
+            ht->count, ht->buckets, (double)ht->count / ht->buckets * 100);
+
+    if (ht->offsets) {
+        for (i = 0; i < n; ++i) {
+            j = (first + i) & N;
+            fprintf(HT_TRACE_OUT, "%03d:%08x:[%02d]\n",
+                    j, (unsigned int)((void **)ht->table)[j], (unsigned int)ht->offsets[j]);
+        }
+    } else {
+        for (i = 0; i < n; ++i) {
+            j = (first + i) & N;
+            fprintf(HT_TRACE_OUT, "%03d:%08x\n", j, (unsigned int)((void **)ht->table)[j]);
+        }
+    }
+    fprintf(HT_TRACE_OUT, "--\n");
+}
+#else
+#define ht_trace(arg1) ((void)0)
+#define ht_tracei(arg1, arg2) ((void)0)
+#define ht_tracex(arg1, arg2) ((void)0)
+#define ht_traces(arg1, arg2, arg3) ((void)0)
+#define ht_trace_buckets(arg1, arg2, arg3, arg4) ((void)0)
+#endif
+
+#endif /* HT_TRACE_H */