Merge branch 'lt/tree-2' into next

* lt/tree-2:
  tree_entry(): new tree-walking helper function

diff --git a/builtin-grep.c b/builtin-grep.c
index 53de8a8..acc4eea 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -578,11 +578,9 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
                     struct tree_desc *tree,
                     const char *tree_name, const char *base)
 {
-       unsigned mode;
        int len;
        int hit = 0;
-       const char *path;
-       const unsigned char *sha1;
+       struct name_entry entry;
        char *down;
        char *path_buf = xmalloc(PATH_MAX + strlen(tree_name) + 100);
 
@@ -597,36 +595,32 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
        }
        len = strlen(path_buf);
 
-       while (tree->size) {
-               int pathlen;
-               sha1 = tree_entry_extract(tree, &path, &mode);
-               pathlen = strlen(path);
-               strcpy(path_buf + len, path);
+       while (tree_entry(tree, &entry)) {
+               strcpy(path_buf + len, entry.path);
 
-               if (S_ISDIR(mode))
+               if (S_ISDIR(entry.mode))
                        /* Match "abc/" against pathspec to
                         * decide if we want to descend into "abc"
                         * directory.
                         */
-                       strcpy(path_buf + len + pathlen, "/");
+                       strcpy(path_buf + len + entry.pathlen, "/");
 
                if (!pathspec_matches(paths, down))
                        ;
-               else if (S_ISREG(mode))
-                       hit |= grep_sha1(opt, sha1, path_buf);
-               else if (S_ISDIR(mode)) {
+               else if (S_ISREG(entry.mode))
+                       hit |= grep_sha1(opt, entry.sha1, path_buf);
+               else if (S_ISDIR(entry.mode)) {
                        char type[20];
                        struct tree_desc sub;
                        void *data;
-                       data = read_sha1_file(sha1, type, &sub.size);
+                       data = read_sha1_file(entry.sha1, type, &sub.size);
                        if (!data)
                                die("unable to read tree (%s)",
-                                   sha1_to_hex(sha1));
+                                   sha1_to_hex(entry.sha1));
                        sub.buf = data;
                        hit |= grep_tree(opt, paths, &sub, tree_name, down);
                        free(data);
                }
-               update_tree_entry(tree);
        }
        return hit;
 }

diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index d70411f..0c6ba3d 100644 (file)
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -54,28 +54,23 @@ typedef int (*merge_fn_t)(struct cache_entry **src);
 static struct tree_entry_list *create_tree_entry_list(struct tree *tree)
 {
        struct tree_desc desc;
+       struct name_entry one;
        struct tree_entry_list *ret = NULL;
        struct tree_entry_list **list_p = &ret;
 
        desc.buf = tree->buffer;
        desc.size = tree->size;
 
-       while (desc.size) {
-               unsigned mode;
-               const char *path;
-               const unsigned char *sha1;
+       while (tree_entry(&desc, &one)) {
                struct tree_entry_list *entry;
 
-               sha1 = tree_entry_extract(&desc, &path, &mode);
-               update_tree_entry(&desc);
-
                entry = xmalloc(sizeof(struct tree_entry_list));
-               entry->name = path;
-               entry->sha1 = sha1;
-               entry->mode = mode;
-               entry->directory = S_ISDIR(mode) != 0;
-               entry->executable = (mode & S_IXUSR) != 0;
-               entry->symlink = S_ISLNK(mode) != 0;
+               entry->name = one.path;
+               entry->sha1 = one.sha1;
+               entry->mode = one.mode;
+               entry->directory = S_ISDIR(one.mode) != 0;
+               entry->executable = (one.mode & S_IXUSR) != 0;
+               entry->symlink = S_ISLNK(one.mode) != 0;
                entry->next = NULL;
 
                *list_p = entry;
@@ -846,27 +841,22 @@ static int read_cache_unmerged(void)
 static void prime_cache_tree_rec(struct cache_tree *it, struct tree *tree)
 {
        struct tree_desc desc;
+       struct name_entry entry;
        int cnt;
 
        memcpy(it->sha1, tree->object.sha1, 20);
        desc.buf = tree->buffer;
        desc.size = tree->size;
        cnt = 0;
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-               if (!S_ISDIR(mode))
+       while (tree_entry(&desc, &entry)) {
+               if (!S_ISDIR(entry.mode))
                        cnt++;
                else {
                        struct cache_tree_sub *sub;
-                       struct tree *subtree = lookup_tree(sha1);
+                       struct tree *subtree = lookup_tree(entry.sha1);
                        if (!subtree->object.parsed)
                                parse_tree(subtree);
-                       sub = cache_tree_sub(it, name);
+                       sub = cache_tree_sub(it, entry.path);
                        sub->cache_tree = cache_tree();
                        prime_cache_tree_rec(sub->cache_tree, subtree);
                        cnt += sub->cache_tree->entry_count;

diff --git a/builtin-rev-list.c b/builtin-rev-list.c
index 6e2b898..17c04b9 100644 (file)
--- a/builtin-rev-list.c
+++ b/builtin-rev-list.c
@@ -114,6 +114,7 @@ static struct object_list **process_tree(struct tree *tree,
 {
        struct object *obj = &tree->object;
        struct tree_desc desc;
+       struct name_entry entry;
        struct name_path me;
 
        if (!revs.tree_objects)
@@ -132,18 +133,11 @@ static struct object_list **process_tree(struct tree *tree,
        desc.buf = tree->buffer;
        desc.size = tree->size;
 
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-
-               if (S_ISDIR(mode))
-                       p = process_tree(lookup_tree(sha1), p, &me, name);
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISDIR(entry.mode))
+                       p = process_tree(lookup_tree(entry.sha1), p, &me, name);
                else
-                       p = process_blob(lookup_blob(sha1), p, &me, name);
+                       p = process_blob(lookup_blob(entry.sha1), p, &me, name);
        }
        free(tree->buffer);
        tree->buffer = NULL;

diff --git a/builtin-tar-tree.c b/builtin-tar-tree.c
index 2d5e06f..5f740cf 100644 (file)
--- a/builtin-tar-tree.c
+++ b/builtin-tar-tree.c
@@ -271,30 +271,25 @@ static void write_global_extended_header(const unsigned char *sha1)
 static void traverse_tree(struct tree_desc *tree, struct strbuf *path)
 {
        int pathlen = path->len;
+       struct name_entry entry;
 
-       while (tree->size) {
-               const char *name;
-               const unsigned char *sha1;
-               unsigned mode;
+       while (tree_entry(tree, &entry)) {
                void *eltbuf;
                char elttype[20];
                unsigned long eltsize;
 
-               sha1 = tree_entry_extract(tree, &name, &mode);
-               update_tree_entry(tree);
-
-               eltbuf = read_sha1_file(sha1, elttype, &eltsize);
+               eltbuf = read_sha1_file(entry.sha1, elttype, &eltsize);
                if (!eltbuf)
-                       die("cannot read %s", sha1_to_hex(sha1));
+                       die("cannot read %s", sha1_to_hex(entry.sha1));
 
                path->len = pathlen;
-               strbuf_append_string(path, name);
-               if (S_ISDIR(mode))
+               strbuf_append_string(path, entry.path);
+               if (S_ISDIR(entry.mode))
                        strbuf_append_string(path, "/");
 
-               write_entry(sha1, path, mode, eltbuf, eltsize);
+               write_entry(entry.sha1, path, entry.mode, eltbuf, eltsize);
 
-               if (S_ISDIR(mode)) {
+               if (S_ISDIR(entry.mode)) {
                        struct tree_desc subtree;
                        subtree.buf = eltbuf;
                        subtree.size = eltsize;

diff --git a/fetch.c b/fetch.c
index b03c201..e9347ba 100644 (file)
--- a/fetch.c
+++ b/fetch.c
@@ -39,25 +39,19 @@ static int process(struct object *obj);
 static int process_tree(struct tree *tree)
 {
        struct tree_desc desc;
+       struct name_entry entry;
 
        if (parse_tree(tree))
                return -1;
 
        desc.buf = tree->buffer;
        desc.size = tree->size;
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-
-               if (S_ISDIR(mode)) {
-                       struct tree *tree = lookup_tree(sha1);
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISDIR(entry.mode)) {
+                       struct tree *tree = lookup_tree(entry.sha1);
                        process_tree(tree);
                } else {
-                       struct blob *blob = lookup_blob(sha1);
+                       struct blob *blob = lookup_blob(entry.sha1);
                        process(&blob->object);
                }
        }

diff --git a/http-push.c b/http-push.c
index 72ad89c..b1c018a 100644 (file)
--- a/http-push.c
+++ b/http-push.c
@@ -1715,6 +1715,7 @@ static struct object_list **process_tree(struct tree *tree,
 {
        struct object *obj = &tree->object;
        struct tree_desc desc;
+       struct name_entry entry;
        struct name_path me;
 
        obj->flags |= LOCAL;
@@ -1734,18 +1735,11 @@ static struct object_list **process_tree(struct tree *tree,
        desc.buf = tree->buffer;
        desc.size = tree->size;
 
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-
-               if (S_ISDIR(mode))
-                       p = process_tree(lookup_tree(sha1), p, &me, name);
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISDIR(entry.mode))
+                       p = process_tree(lookup_tree(entry.sha1), p, &me, name);
                else
-                       p = process_blob(lookup_blob(sha1), p, &me, name);
+                       p = process_blob(lookup_blob(entry.sha1), p, &me, name);
        }
        free(tree->buffer);
        tree->buffer = NULL;

diff --git a/pack-objects.c b/pack-objects.c
index 77284cf..3590cd5 100644 (file)
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -690,25 +690,20 @@ static void add_pbase_object(struct tree_desc *tree,
                             const char *name,
                             int cmplen)
 {
-       while (tree->size) {
-               const unsigned char *sha1;
-               const char *entry_name;
-               int entry_len;
-               unsigned mode;
+       struct name_entry entry;
+
+       while (tree_entry(tree,&entry)) {
                unsigned long size;
                char type[20];
 
-               sha1 = tree_entry_extract(tree, &entry_name, &mode);
-               update_tree_entry(tree);
-               entry_len = strlen(entry_name);
-               if (entry_len != cmplen ||
-                   memcmp(entry_name, name, cmplen) ||
-                   !has_sha1_file(sha1) ||
-                   sha1_object_info(sha1, type, &size))
+               if (entry.pathlen != cmplen ||
+                   memcmp(entry.path, name, cmplen) ||
+                   !has_sha1_file(entry.sha1) ||
+                   sha1_object_info(entry.sha1, type, &size))
                        continue;
                if (name[cmplen] != '/') {
                        unsigned hash = name_hash(up, name);
-                       add_object_entry(sha1, hash, 1);
+                       add_object_entry(entry.sha1, hash, 1);
                        return;
                }
                if (!strcmp(type, tree_type)) {
@@ -718,15 +713,15 @@ static void add_pbase_object(struct tree_desc *tree,
                        const char *down = name+cmplen+1;
                        int downlen = name_cmp_len(down);
 
-                       tree = pbase_tree_get(sha1);
+                       tree = pbase_tree_get(entry.sha1);
                        if (!tree)
                                return;
                        sub.buf = tree->tree_data;
                        sub.size = tree->tree_size;
 
                        me.up = up;
-                       me.elem = entry_name;
-                       me.len = entry_len;
+                       me.elem = entry.path;
+                       me.len = entry.pathlen;
                        add_pbase_object(&sub, &me, down, downlen);
                        pbase_tree_put(tree);
                }

diff --git a/revision.c b/revision.c
index 8e93e40..6a6952c 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -54,6 +54,7 @@ static void mark_blob_uninteresting(struct blob *blob)
 void mark_tree_uninteresting(struct tree *tree)
 {
        struct tree_desc desc;
+       struct name_entry entry;
        struct object *obj = &tree->object;
 
        if (obj->flags & UNINTERESTING)
@@ -66,18 +67,11 @@ void mark_tree_uninteresting(struct tree *tree)
 
        desc.buf = tree->buffer;
        desc.size = tree->size;
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-
-               if (S_ISDIR(mode))
-                       mark_tree_uninteresting(lookup_tree(sha1));
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISDIR(entry.mode))
+                       mark_tree_uninteresting(lookup_tree(entry.sha1));
                else
-                       mark_blob_uninteresting(lookup_blob(sha1));
+                       mark_blob_uninteresting(lookup_blob(entry.sha1));
        }
 
        /*

diff --git a/tree-walk.c b/tree-walk.c
index 3922058..297c697 100644 (file)
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -37,7 +37,7 @@ static void entry_extract(struct tree_desc *t, struct name_entry *a)
 
 void update_tree_entry(struct tree_desc *desc)
 {
-       void *buf = desc->buf;
+       const void *buf = desc->buf;
        unsigned long size = desc->size;
        int len = strlen(buf) + 1 + 20;
 
@@ -63,7 +63,7 @@ static const char *get_mode(const char *str, unsigned int *modep)
 
 const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
 {
-       void *tree = desc->buf;
+       const void *tree = desc->buf;
        unsigned long size = desc->size;
        int len = strlen(tree)+1;
        const unsigned char *sha1 = tree + len;
@@ -78,6 +78,35 @@ const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pat
        return sha1;
 }
 
+int tree_entry(struct tree_desc *desc, struct name_entry *entry)
+{
+       const void *tree = desc->buf, *path;
+       unsigned long len, size = desc->size;
+
+       if (!size)
+               return 0;
+
+       path = get_mode(tree, &entry->mode);
+       if (!path)
+               die("corrupt tree file");
+
+       entry->path = path;
+       len = strlen(path);
+       entry->pathlen = len;
+
+       path += len + 1;
+       entry->sha1 = path;
+
+       path += 20;
+       len = path - tree;
+       if (len > size)
+               die("corrupt tree file");
+
+       desc->buf = path;
+       desc->size = size - len;
+       return 1;
+}
+
 void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback)
 {
        struct name_entry *entry = xmalloc(n*sizeof(*entry));

diff --git a/tree-walk.h b/tree-walk.h
index 47438fe..e57befa 100644 (file)
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -2,7 +2,7 @@
 #define TREE_WALK_H
 
 struct tree_desc {
-       void *buf;
+       const void *buf;
        unsigned long size;
 };
 
@@ -16,6 +16,9 @@ struct name_entry {
 void update_tree_entry(struct tree_desc *);
 const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
 
+/* Helper function that does both of the above and returns true for success */
+int tree_entry(struct tree_desc *, struct name_entry *);
+
 void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
 
 typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry *entry, const char *base);

diff --git a/tree.c b/tree.c
index fb18724..9bbe2da 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -79,6 +79,7 @@ int read_tree_recursive(struct tree *tree,
                        read_tree_fn_t fn)
 {
        struct tree_desc desc;
+       struct name_entry entry;
 
        if (parse_tree(tree))
                return -1;
@@ -86,18 +87,11 @@ int read_tree_recursive(struct tree *tree,
        desc.buf = tree->buffer;
        desc.size = tree->size;
 
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
-
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-
-               if (!match_tree_entry(base, baselen, name, mode, match))
+       while (tree_entry(&desc, &entry)) {
+               if (!match_tree_entry(base, baselen, entry.path, entry.mode, match))
                        continue;
 
-               switch (fn(sha1, base, baselen, name, mode, stage)) {
+               switch (fn(entry.sha1, base, baselen, entry.path, entry.mode, stage)) {
                case 0:
                        continue;
                case READ_TREE_RECURSIVE:
@@ -105,18 +99,17 @@ int read_tree_recursive(struct tree *tree,
                default:
                        return -1;
                }
-               if (S_ISDIR(mode)) {
+               if (S_ISDIR(entry.mode)) {
                        int retval;
-                       int pathlen = strlen(name);
                        char *newbase;
 
-                       newbase = xmalloc(baselen + 1 + pathlen);
+                       newbase = xmalloc(baselen + 1 + entry.pathlen);
                        memcpy(newbase, base, baselen);
-                       memcpy(newbase + baselen, name, pathlen);
-                       newbase[baselen + pathlen] = '/';
-                       retval = read_tree_recursive(lookup_tree(sha1),
+                       memcpy(newbase + baselen, entry.path, entry.pathlen);
+                       newbase[baselen + entry.pathlen] = '/';
+                       retval = read_tree_recursive(lookup_tree(entry.sha1),
                                                     newbase,
-                                                    baselen + pathlen + 1,
+                                                    baselen + entry.pathlen + 1,
                                                     stage, match, fn);
                        free(newbase);
                        if (retval)
@@ -156,6 +149,7 @@ static int track_tree_refs(struct tree *item)
        int n_refs = 0, i;
        struct object_refs *refs;
        struct tree_desc desc;
+       struct name_entry entry;
 
        /* Count how many entries there are.. */
        desc.buf = item->buffer;
@@ -170,18 +164,13 @@ static int track_tree_refs(struct tree *item)
        refs = alloc_object_refs(n_refs);
        desc.buf = item->buffer;
        desc.size = item->size;
-       while (desc.size) {
-               unsigned mode;
-               const char *name;
-               const unsigned char *sha1;
+       while (tree_entry(&desc, &entry)) {
                struct object *obj;
 
-               sha1 = tree_entry_extract(&desc, &name, &mode);
-               update_tree_entry(&desc);
-               if (S_ISDIR(mode))
-                       obj = &lookup_tree(sha1)->object;
+               if (S_ISDIR(entry.mode))
+                       obj = &lookup_tree(entry.sha1)->object;
                else
-                       obj = &lookup_blob(sha1)->object;
+                       obj = &lookup_blob(entry.sha1)->object;
                refs->ref[i++] = obj;
        }
        set_object_refs(&item->object, refs);