X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=tree.c;h=315b6a5d1ce0e83fc75a399a3b74e51f46c5b392;hb=1bd8c8f00b1c7facb67c99047fe777b53f2c49ff;hp=1aee098117e33c9f149f1452e8264caabedf7f21;hpb=175785e5ff7395be8a458694a7df0511ac14e948;p=git.git

diff --git a/tree.c b/tree.c
index 1aee0981..315b6a5d 100644
--- a/tree.c
+++ b/tree.c
@@ -1,20 +1,142 @@
 #include "tree.h"
 #include "blob.h"
+#include "commit.h"
+#include "tag.h"
 #include "cache.h"
 #include <stdlib.h>
 
 const char *tree_type = "tree";
 
-struct tree *lookup_tree(unsigned char *sha1)
+static int read_one_entry(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);
+
+	memset(ce, 0, 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|ADD_CACHE_SKIP_DFCHECK);
+}
+
+static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths)
+{
+	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;
+		}
+
+		/* Does the base match? */
+		if (strncmp(base, match, baselen))
+			continue;
+
+		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;
+
+		return 1;
+	}
+	return 0;
+}
+
+static int read_tree_recursive(void *buffer, unsigned long size,
+			       const char *base, int baselen,
+			       int stage, const char **match)
+{
+	while (size) {
+		int len = strlen(buffer)+1;
+		unsigned char *sha1 = buffer + len;
+		char *path = strchr(buffer, ' ')+1;
+		unsigned int mode;
+
+		if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
+			return -1;
+
+		buffer = sha1 + 20;
+		size -= len + 20;
+
+		if (!match_tree_entry(base, baselen, path, mode, match))
+			continue;
+
+		if (S_ISDIR(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);
+			memcpy(newbase, base, baselen);
+			memcpy(newbase + baselen, path, pathlen);
+			newbase[baselen + pathlen] = '/';
+			retval = read_tree_recursive(eltbuf, eltsize,
+						     newbase,
+						     baselen + pathlen + 1,
+						     stage, match);
+			free(eltbuf);
+			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, const char **match)
+{
+	return read_tree_recursive(buffer, size, "", 0, stage, match);
+}
+
+struct tree *lookup_tree(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
 	if (!obj) {
-		struct tree *ret = malloc(sizeof(struct tree));
+		struct tree *ret = xmalloc(sizeof(struct tree));
 		memset(ret, 0, sizeof(struct tree));
 		created_object(sha1, &ret->object);
+		ret->object.type = tree_type;
 		return ret;
 	}
-	if (obj->parsed && obj->type != tree_type) {
+	if (!obj->type)
+		obj->type = tree_type;
+	if (obj->type != tree_type) {
 		error("Object %s is a %s, not a tree", 
 		      sha1_to_hex(sha1), obj->type);
 		return NULL;
@@ -22,24 +144,18 @@ struct tree *lookup_tree(unsigned char *sha1)
 	return (struct tree *) obj;
 }
 
-int parse_tree(struct tree *item)
+int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
 {
-	char type[20];
-	void *buffer, *bufptr;
-	unsigned long size;
+	void *bufptr = buffer;
+	struct tree_entry_list **list_p;
+
 	if (item->object.parsed)
 		return 0;
 	item->object.parsed = 1;
-	item->object.type = tree_type;
-	buffer = bufptr = read_sha1_file(item->object.sha1, type, &size);
-	if (!buffer)
-		return error("Could not read %s",
-			     sha1_to_hex(item->object.sha1));
-	if (strcmp(type, tree_type))
-		return error("Object %s not a tree",
-			     sha1_to_hex(item->object.sha1));
+	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, ' ');
@@ -48,20 +164,72 @@ int parse_tree(struct tree *item)
 		    sscanf(bufptr, "%o", &mode) != 1)
 			return -1;
 
-		/* Warn about trees that don't do the recursive thing.. */
-		if (strchr(path, '/')) {
-			item->has_full_path = 1;
-		}
+		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->zeropad = *(char *)bufptr == '0';
+		entry->mode = mode;
+		entry->next = NULL;
 
 		bufptr += len + 20;
 		size -= len + 20;
 
-		if (S_ISDIR(mode)) {
-			obj = &lookup_tree(file_sha1)->object;
+		if (entry->directory) {
+			entry->item.tree = lookup_tree(file_sha1);
+			obj = &entry->item.tree->object;
 		} else {
-			obj = &lookup_blob(file_sha1)->object;
+			entry->item.blob = lookup_blob(file_sha1);
+			obj = &entry->item.blob->object;
 		}
-		add_ref(&item->object, obj);
+		if (obj)
+			add_ref(&item->object, obj);
+		entry->parent = NULL; /* needs to be filled by the user */
+		*list_p = entry;
+		list_p = &entry->next;
 	}
 	return 0;
 }
+
+int parse_tree(struct tree *item)
+{
+	 char type[20];
+	 void *buffer;
+	 unsigned long size;
+	 int ret;
+
+	if (item->object.parsed)
+		return 0;
+	buffer = read_sha1_file(item->object.sha1, type, &size);
+	if (!buffer)
+		return error("Could not read %s",
+			     sha1_to_hex(item->object.sha1));
+	if (strcmp(type, tree_type)) {
+		free(buffer);
+		return error("Object %s not a tree",
+			     sha1_to_hex(item->object.sha1));
+	}
+	ret = parse_tree_buffer(item, buffer, size);
+	free(buffer);
+	return ret;
+}
+
+struct tree *parse_tree_indirect(const unsigned char *sha1)
+{
+	struct object *obj = parse_object(sha1);
+	do {
+		if (!obj)
+			return NULL;
+		if (obj->type == tree_type)
+			return (struct tree *) obj;
+		else if (obj->type == commit_type)
+			obj = &(((struct commit *) obj)->tree->object);
+		else if (obj->type == tag_type)
+			obj = ((struct tag *) obj)->tagged;
+		else
+			return NULL;
+		if (!obj->parsed)
+			parse_object(obj->sha1);
+	} while (1);
+}