bloom: Add some source documentation.

diff --git a/bloom.c b/bloom.c
index f7a9b1aabd32f89863fa09f4c0121942df1b23f9..9b66b903be5d189704d0fedbac0cb07c70bd5113 100644 (file)
--- a/bloom.c
+++ b/bloom.c
@@ -114,13 +114,11 @@ int bloom_test_and_insert(const uint8_t *data, size_t len, struct bloom *b)
        return !ret;
 }
 
-int bloom_test_and_insert_string(const char *str, struct bloom *b)
-{
-       uint32_t len = strlen(str);
-
-       return bloom_test_and_insert((const uint8_t *)str, len, b);
-}
-
+/**
+ * Deallocate a bloom filter.
+ *
+ * \param b The filter to deallocate.
+ */
 void bloom_free(struct bloom *b)
 {
        if (!b)
@@ -129,6 +127,12 @@ void bloom_free(struct bloom *b)
        free(b);
 }
 
+/**
+ * Initialize a bloom filter.
+ *
+ * \param order Use a filter containing 2^order bits.
+ * \param num_hash_functions Set that many bits in the filter per entry.
+ */
 int bloom_init(unsigned order, unsigned num_hash_functions,
                struct bloom **result)
 {
@@ -145,6 +149,13 @@ int bloom_init(unsigned order, unsigned num_hash_functions,
 
 #ifdef TEST_BLOOM
 
+int bloom_test_and_insert_string(const char *str, struct bloom *b)
+{
+       uint32_t len = strlen(str);
+
+       return bloom_test_and_insert((const uint8_t *)str, len, b);
+}
+
 void add_stdin(struct bloom *b)
 {
        char buf[255];

diff --git a/bloom.h b/bloom.h
index afb22980d504e9a1d70cc3622ea8d647ea2566a5..e7f3cd33dc2018d03f410064731c0a8be97b6e59 100644 (file)
--- a/bloom.h
+++ b/bloom.h
@@ -1,8 +1,22 @@
+/*
+ * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
+/** \file bloom.h Struct bloom and bloom filter functions. */
+
+/** Describes one instance of a bloom filter. */
 struct bloom {
+       /** The bloom filter is of size 2^order bits. */
        unsigned order;
+       /** Set that many bits in the filter per entry. */
        unsigned num_hash_functions;
+       /** How many entries have been inserted so far. */
        uint64_t num_entries;
+       /** Number of bits currently set. */
        uint64_t num_set_bits;
+       /** The bit array. */
        uint8_t *filter;
 };
 

diff --git a/create.c b/create.c
index 1b4ba880a1c3d220adc664b83bdae3ab1a46eef0..51583a65fe4910ab4d5d812d48e26d25745f9cd4 100644 (file)
--- a/create.c
+++ b/create.c
@@ -31,7 +31,9 @@ static int consider_bloom(struct stat64 *s)
        return 1;
 }
 
+/** Data size to hash for the global bloom filter. */
 #define GLOBAL_BLOOM_BUF_SIZE (sizeof(ino_t) + sizeof(dev_t) + sizeof(off_t))
+/** For the user bloom filter also the uid is being hashed. */
 #define USER_BLOOM_BUF_SIZE (GLOBAL_BLOOM_BUF_SIZE + sizeof(uid_t))
 
 static void make_bloom_buf(struct stat64 *s, uint8_t buf[USER_BLOOM_BUF_SIZE])