X-Git-Url: https://git.octo.it/?p=git.git;a=blobdiff_plain;f=tree.c;h=64422fd27e3f855b7989bc8cb9a6a0ada7a30472;hp=ca800a85f771be1bd10d6575d93ca05bd3fc381c;hb=HEAD;hpb=1c9da46da4fe5cf99c5f6ab251419d0f412ecfba

diff --git a/tree.c b/tree.c
index ca800a85..64422fd2 100644
--- a/tree.c
+++ b/tree.c
@@ -1,140 +1,192 @@
+#include "cache.h"
 #include "tree.h"
 #include "blob.h"
-#include "cache.h"
+#include "commit.h"
+#include "tag.h"
+#include "tree-walk.h"
 #include <stdlib.h>
 
 const char *tree_type = "tree";
 
-static int read_one_entry(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
+static int read_one_entry(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
 {
-	int len = strlen(pathname);
-	unsigned int size = cache_entry_size(baselen + len);
-	struct cache_entry *ce = xmalloc(size);
+	int len;
+	unsigned int size;
+	struct cache_entry *ce;
+
+	if (S_ISDIR(mode))
+		return READ_TREE_RECURSIVE;
 
-	memset(ce, 0, size);
+	len = strlen(pathname);
+	size = cache_entry_size(baselen + len);
+	ce = xcalloc(1, size);
 
 	ce->ce_mode = create_ce_mode(mode);
 	ce->ce_flags = create_ce_flags(baselen + len, stage);
 	memcpy(ce->name, base, baselen);
 	memcpy(ce->name + baselen, pathname, len+1);
 	memcpy(ce->sha1, sha1, 20);
-	return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD);
+	return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
 }
 
-static int read_tree_recursive(void *buffer, unsigned long size,
-			       const char *base, int baselen, int stage)
+static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths)
 {
-	while (size) {
-		int len = strlen(buffer)+1;
-		unsigned char *sha1 = buffer + len;
-		char *path = strchr(buffer, ' ')+1;
-		unsigned int mode;
+	const char *match;
+	int pathlen;
+
+	if (!paths)
+		return 1;
+	pathlen = strlen(path);
+	while ((match = *paths++) != NULL) {
+		int matchlen = strlen(match);
+
+		if (baselen >= matchlen) {
+			/* If it doesn't match, move along... */
+			if (strncmp(base, match, matchlen))
+				continue;
+			/* The base is a subdirectory of a path which was specified. */
+			return 1;
+		}
 
-		if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
-			return -1;
+		/* Does the base match? */
+		if (strncmp(base, match, baselen))
+			continue;
 
-		buffer = sha1 + 20;
-		size -= len + 20;
+		match += baselen;
+		matchlen -= baselen;
+
+		if (pathlen > matchlen)
+			continue;
+
+		if (matchlen > pathlen) {
+			if (match[pathlen] != '/')
+				continue;
+			if (!S_ISDIR(mode))
+				continue;
+		}
+
+		if (strncmp(path, match, pathlen))
+			continue;
 
-		if (S_ISDIR(mode)) {
+		return 1;
+	}
+	return 0;
+}
+
+int read_tree_recursive(struct tree *tree,
+			const char *base, int baselen,
+			int stage, const char **match,
+			read_tree_fn_t fn)
+{
+	struct tree_desc desc;
+	struct name_entry entry;
+
+	if (parse_tree(tree))
+		return -1;
+
+	desc.buf = tree->buffer;
+	desc.size = tree->size;
+
+	while (tree_entry(&desc, &entry)) {
+		if (!match_tree_entry(base, baselen, entry.path, entry.mode, match))
+			continue;
+
+		switch (fn(entry.sha1, base, baselen, entry.path, entry.mode, stage)) {
+		case 0:
+			continue;
+		case READ_TREE_RECURSIVE:
+			break;;
+		default:
+			return -1;
+		}
+		if (S_ISDIR(entry.mode)) {
 			int retval;
-			int pathlen = strlen(path);
 			char *newbase;
-			void *eltbuf;
-			char elttype[20];
-			unsigned long eltsize;
 
-			eltbuf = read_sha1_file(sha1, elttype, &eltsize);
-			if (!eltbuf || strcmp(elttype, "tree")) {
-				if (eltbuf) free(eltbuf);
-				return -1;
-			}
-			newbase = xmalloc(baselen + 1 + pathlen);
+			newbase = xmalloc(baselen + 1 + entry.pathlen);
 			memcpy(newbase, base, baselen);
-			memcpy(newbase + baselen, path, pathlen);
-			newbase[baselen + pathlen] = '/';
-			retval = read_tree_recursive(eltbuf, eltsize,
+			memcpy(newbase + baselen, entry.path, entry.pathlen);
+			newbase[baselen + entry.pathlen] = '/';
+			retval = read_tree_recursive(lookup_tree(entry.sha1),
 						     newbase,
-						     baselen + pathlen + 1, stage);
-			free(eltbuf);
+						     baselen + entry.pathlen + 1,
+						     stage, match, fn);
 			free(newbase);
 			if (retval)
 				return -1;
 			continue;
 		}
-		if (read_one_entry(sha1, base, baselen, path, mode, stage) < 0)
-			return -1;
 	}
 	return 0;
 }
 
-int read_tree(void *buffer, unsigned long size, int stage)
+int read_tree(struct tree *tree, int stage, const char **match)
 {
-	return read_tree_recursive(buffer, size, "", 0, stage);
+	return read_tree_recursive(tree, "", 0, stage, match, read_one_entry);
 }
 
-struct tree *lookup_tree(unsigned char *sha1)
+struct tree *lookup_tree(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
 	if (!obj) {
-		struct tree *ret = xmalloc(sizeof(struct tree));
-		memset(ret, 0, sizeof(struct tree));
+		struct tree *ret = xcalloc(1, sizeof(struct tree));
 		created_object(sha1, &ret->object);
-		ret->object.type = tree_type;
+		ret->object.type = TYPE_TREE;
 		return ret;
 	}
-	if (obj->type != tree_type) {
-		error("Object %s is a %s, not a tree", 
-		      sha1_to_hex(sha1), obj->type);
+	if (!obj->type)
+		obj->type = TYPE_TREE;
+	if (obj->type != TYPE_TREE) {
+		error("Object %s is a %s, not a tree",
+		      sha1_to_hex(sha1), typename(obj->type));
 		return NULL;
 	}
 	return (struct tree *) obj;
 }
 
-int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
+static int track_tree_refs(struct tree *item)
 {
-	void *bufptr = buffer;
-	struct tree_entry_list **list_p;
+	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;
+	desc.size = item->size;
+	while (desc.size) {
+		n_refs++;
+		update_tree_entry(&desc);
+	}
+
+	/* Allocate object refs and walk it again.. */
+	i = 0;
+	refs = alloc_object_refs(n_refs);
+	desc.buf = item->buffer;
+	desc.size = item->size;
+	while (tree_entry(&desc, &entry)) {
+		struct object *obj;
+
+		if (S_ISDIR(entry.mode))
+			obj = &lookup_tree(entry.sha1)->object;
+		else
+			obj = &lookup_blob(entry.sha1)->object;
+		refs->ref[i++] = obj;
+	}
+	set_object_refs(&item->object, refs);
+	return 0;
+}
 
+int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
+{
 	if (item->object.parsed)
 		return 0;
 	item->object.parsed = 1;
-	list_p = &item->entries;
-	while (size) {
-		struct object *obj;
-		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;
+	item->buffer = buffer;
+	item->size = size;
 
-		entry = xmalloc(sizeof(struct tree_entry_list));
-		entry->name = strdup(path + 1);
-		entry->directory = S_ISDIR(mode) != 0;
-		entry->executable = (mode & S_IXUSR) != 0;
-		entry->symlink = S_ISLNK(mode) != 0;
-		entry->mode = mode;
-		entry->next = NULL;
-
-		bufptr += len + 20;
-		size -= len + 20;
-
-		if (entry->directory) {
-			entry->item.tree = lookup_tree(file_sha1);
-			obj = &entry->item.tree->object;
-		} else {
-			entry->item.blob = lookup_blob(file_sha1);
-			obj = &entry->item.blob->object;
-		}
-		if (obj)
-			add_ref(&item->object, obj);
-
-		*list_p = entry;
-		list_p = &entry->next;
-	}
+	if (track_object_refs)
+		track_tree_refs(item);
 	return 0;
 }
 
@@ -143,7 +195,6 @@ int parse_tree(struct tree *item)
 	 char type[20];
 	 void *buffer;
 	 unsigned long size;
-	 int ret;
 
 	if (item->object.parsed)
 		return 0;
@@ -156,7 +207,24 @@ 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)
+{
+	struct object *obj = parse_object(sha1);
+	do {
+		if (!obj)
+			return NULL;
+		if (obj->type == TYPE_TREE)
+			return (struct tree *) obj;
+		else if (obj->type == TYPE_COMMIT)
+			obj = &(((struct commit *) obj)->tree->object);
+		else if (obj->type == TYPE_TAG)
+			obj = ((struct tag *) obj)->tagged;
+		else
+			return NULL;
+		if (!obj->parsed)
+			parse_object(obj->sha1);
+	} while (1);
 }