From d2eafb76611670d7573f9409b0c727019fe50e18 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 28 May 2006 15:07:07 -0700 Subject: [PATCH] Add raw tree buffer info to "struct tree" This allows us to avoid allocating information for names etc, because we can just use the information from the tree buffer directly. We still keep the old "tree_entry_list" in struct tree as well, so old users aren't affected, apart from the fact that the allocations are different (if you free a tree entry, you should no longer free the name allocation for it, since it's allocated as part of "tree->buffer") Signed-off-by: Linus Torvalds Signed-off-by: Junio C Hamano --- builtin-read-tree.c | 4 ++-- builtin-rev-list.c | 3 ++- fsck-objects.c | 7 +++---- object.c | 5 ++++- tree.c | 47 ++++++++++++++++++++++------------------------- tree.h | 4 +++- 6 files changed, 36 insertions(+), 34 deletions(-) diff --git a/builtin-read-tree.c b/builtin-read-tree.c index ec40d013..740a8c7e 100644 --- a/builtin-read-tree.c +++ b/builtin-read-tree.c @@ -38,7 +38,7 @@ static struct tree_entry_list df_conflict_list = { typedef int (*merge_fn_t)(struct cache_entry **src); -static int entcmp(char *name1, int dir1, char *name2, int dir2) +static int entcmp(const char *name1, int dir1, const char *name2, int dir2) { int len1 = strlen(name1); int len2 = strlen(name2); @@ -66,7 +66,7 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len, int src_size = len + 1; do { int i; - char *first; + const char *first; int firstdir = 0; int pathlen; unsigned ce_size; diff --git a/builtin-rev-list.c b/builtin-rev-list.c index 5277d3cf..72c1549c 100644 --- a/builtin-rev-list.c +++ b/builtin-rev-list.c @@ -136,10 +136,11 @@ static struct object_list **process_tree(struct tree *tree, p = process_tree(entry->item.tree, p, &me, entry->name); else p = process_blob(entry->item.blob, p, &me, entry->name); - free(entry->name); free(entry); entry = next; } + free(tree->buffer); + tree->buffer = NULL; return p; } diff --git a/fsck-objects.c b/fsck-objects.c index 59b25904..a0290b09 100644 --- a/fsck-objects.c +++ b/fsck-objects.c @@ -197,17 +197,16 @@ static int fsck_tree(struct tree *item) default: break; } - free(last->name); free(last); } last = entry; } - if (last) { - free(last->name); + if (last) free(last); - } item->entries = NULL; + free(item->buffer); + item->buffer = NULL; retval = 0; if (has_full_path) { diff --git a/object.c b/object.c index 4d46e0d5..1a7823c2 100644 --- a/object.c +++ b/object.c @@ -200,8 +200,11 @@ struct object *parse_object(const unsigned char *sha1) obj = &blob->object; } else if (!strcmp(type, tree_type)) { struct tree *tree = lookup_tree(sha1); - parse_tree_buffer(tree, buffer, size); obj = &tree->object; + if (!tree->object.parsed) { + parse_tree_buffer(tree, buffer, size); + buffer = NULL; + } } else if (!strcmp(type, commit_type)) { struct commit *commit = lookup_commit(sha1); parse_commit_buffer(commit, buffer, size); diff --git a/tree.c b/tree.c index d599fb5e..1e76d9cc 100644 --- a/tree.c +++ b/tree.c @@ -3,6 +3,7 @@ #include "blob.h" #include "commit.h" #include "tag.h" +#include "tree-walk.h" #include const char *tree_type = "tree"; @@ -145,46 +146,45 @@ struct tree *lookup_tree(const unsigned char *sha1) int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size) { - void *bufptr = buffer; + struct tree_desc desc; struct tree_entry_list **list_p; int n_refs = 0; if (item->object.parsed) return 0; item->object.parsed = 1; + item->buffer = buffer; + item->size = size; + + desc.buf = buffer; + desc.size = size; + list_p = &item->entries; - while (size) { - struct object *obj; + while (desc.size) { + unsigned mode; + const char *path; + const unsigned char *sha1; struct tree_entry_list *entry; - int len = 1+strlen(bufptr); - unsigned char *file_sha1 = bufptr + len; - char *path = strchr(bufptr, ' '); - unsigned int mode; - if (size < len + 20 || !path || - sscanf(bufptr, "%o", &mode) != 1) - return -1; + + sha1 = tree_entry_extract(&desc, &path, &mode); entry = xmalloc(sizeof(struct tree_entry_list)); - entry->name = strdup(path + 1); + entry->name = path; + entry->mode = mode; entry->directory = S_ISDIR(mode) != 0; entry->executable = (mode & S_IXUSR) != 0; entry->symlink = S_ISLNK(mode) != 0; - entry->zeropad = *(char *)bufptr == '0'; - entry->mode = mode; + entry->zeropad = *(const char *)(desc.buf) == '0'; entry->next = NULL; - bufptr += len + 20; - size -= len + 20; + update_tree_entry(&desc); if (entry->directory) { - entry->item.tree = lookup_tree(file_sha1); - obj = &entry->item.tree->object; + entry->item.tree = lookup_tree(sha1); } else { - entry->item.blob = lookup_blob(file_sha1); - obj = &entry->item.blob->object; + entry->item.blob = lookup_blob(sha1); } - if (obj) - n_refs++; + n_refs++; *list_p = entry; list_p = &entry->next; } @@ -206,7 +206,6 @@ int parse_tree(struct tree *item) char type[20]; void *buffer; unsigned long size; - int ret; if (item->object.parsed) return 0; @@ -219,9 +218,7 @@ int parse_tree(struct tree *item) return error("Object %s not a tree", sha1_to_hex(item->object.sha1)); } - ret = parse_tree_buffer(item, buffer, size); - free(buffer); - return ret; + return parse_tree_buffer(item, buffer, size); } struct tree *parse_tree_indirect(const unsigned char *sha1) diff --git a/tree.h b/tree.h index 330ab64b..066ac5d5 100644 --- a/tree.h +++ b/tree.h @@ -12,7 +12,7 @@ struct tree_entry_list { unsigned symlink : 1; unsigned zeropad : 1; unsigned int mode; - char *name; + const char *name; union { struct object *any; struct tree *tree; @@ -22,6 +22,8 @@ struct tree_entry_list { struct tree { struct object object; + void *buffer; + unsigned long size; struct tree_entry_list *entries; }; -- 2.11.0