Subject: [PATCH/RFC 5/5] diffcore-rename.c: use new hash map implementation

From: Karsten Blees <[email-masked]>
Date: Wed, 11 Sep 2013 01:30:41 +0200

Signed-off-by: Karsten Blees <[email-masked]>
---
 diffcore-rename.c | 48 +++++++++++++-----------------------------------
 1 file changed, 13 insertions(+), 35 deletions(-)

diff --git a/diffcore-rename.c b/diffcore-rename.c
index 82b7975..6271af9 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -4,7 +4,7 @@
 #include "cache.h"
 #include "diff.h"
 #include "diffcore.h"
-#include "hash.h"
+#include "hashmap.h"
 #include "progress.h"
 
 /* Table of rename/copy destinations */
@@ -243,9 +243,9 @@ static int score_compare(const void *a_, const void *b_)
 }
 
 struct file_similarity {
+	hashmap_entry entry;
 	int index;
 	struct diff_filespec *filespec;
-	struct file_similarity *next;
 };
 
 static unsigned int hash_filespec(struct diff_filespec *filespec)
@@ -260,21 +260,22 @@ static unsigned int hash_filespec(struct diff_filespec *filespec)
 	return hash;
 }
 
-static int find_identical_files(struct hash_table *srcs,
+static int find_identical_files(hashmap *srcs,
 				int dst_index,
 				struct diff_options *options)
 {
 	int renames = 0;
 
 	struct diff_filespec *target = rename_dst[dst_index].two;
-	struct file_similarity *p, *best;
+	struct file_similarity *p, *best, dst;
 	int i = 100, best_score = -1;
 
 	/*
 	 * Find the best source match for specified destination.
 	 */
 	best = NULL;
-	for (p = lookup_hash(hash_filespec(target), srcs); p; p = p->next) {
+	hashmap_entry_init(&dst, hash_filespec(target), 0);
+	for (p = hashmap_get(srcs, &dst); p; p = hashmap_get_next(srcs, p)) {
 		int score;
 		struct diff_filespec *source = p->filespec;
 
@@ -309,34 +310,15 @@ static int find_identical_files(struct hash_table *srcs,
 	return renames;
 }
 
-static int free_similarity_list(void *p, void *unused)
+static void insert_file_table(hashmap *table, int index, struct diff_filespec *filespec)
 {
-	while (p) {
-		struct file_similarity *entry = p;
-		p = entry->next;
-		free(entry);
-	}
-	return 0;
-}
-
-static void insert_file_table(struct hash_table *table, int index, struct diff_filespec *filespec)
-{
-	void **pos;
-	unsigned int hash;
 	struct file_similarity *entry = xmalloc(sizeof(*entry));
 
 	entry->index = index;
 	entry->filespec = filespec;
-	entry->next = NULL;
-
-	hash = hash_filespec(filespec);
-	pos = insert_hash(hash, entry, table);
 
-	/* We already had an entry there? */
-	if (pos) {
-		entry->next = *pos;
-		*pos = entry;
-	}
+	hashmap_entry_init(entry, hash_filespec(filespec), 0);
+	hashmap_add(table, entry);
 }
 
 /*
@@ -349,11 +331,10 @@ static void insert_file_table(struct hash_table *table, int index, struct diff_f
 static int find_exact_renames(struct diff_options *options)
 {
 	int i, renames;
-	struct hash_table file_table;
+	hashmap file_table;
 
 	/* Add all sources to the hash table */
-	init_hash(&file_table);
-	preallocate_hash(&file_table, rename_src_nr);
+	hashmap_init(&file_table, NULL, rename_src_nr);
 	for (i = 0; i < rename_src_nr; i++)
 		insert_file_table(&file_table, i, rename_src[i].p->one);
 
@@ -361,11 +342,8 @@ static int find_exact_renames(struct diff_options *options)
 	for (i = 0; i < rename_dst_nr; i++)
 		renames += find_identical_files(&file_table, i, options);
 
-	/* Free source file_similarity chains */
-	for_each_hash(&file_table, free_similarity_list, options);
-
-	/* .. and free the hash data structure */
-	free_hash(&file_table);
+	/* Free the hash data structure and entries */
+	hashmap_free(&file_table, free);
 
 	return renames;
 }
-- 
1.8.4.8243.gbcbdefd