The test of the basic diff functionality

diff --git a/tree.c b/tree.c
index 79b9625855c017ce0298f62cc398ed4d16964cb1..ca800a85f771be1bd10d6575d93ca05bd3fc381c 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -9,7 +9,7 @@ static int read_one_entry(unsigned char *sha1, const char *base, int baselen, co
 {
        int len = strlen(pathname);
        unsigned int size = cache_entry_size(baselen + len);
-       struct cache_entry *ce = malloc(size);
+       struct cache_entry *ce = xmalloc(size);
 
        memset(ce, 0, size);
 
@@ -18,7 +18,7 @@ static int read_one_entry(unsigned char *sha1, const char *base, int baselen, co
        memcpy(ce->name, base, baselen);
        memcpy(ce->name + baselen, pathname, len+1);
        memcpy(ce->sha1, sha1, 20);
-       return add_cache_entry(ce, 1);
+       return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD);
 }
 
 static int read_tree_recursive(void *buffer, unsigned long size,
@@ -39,14 +39,17 @@ static int read_tree_recursive(void *buffer, unsigned long size,
                if (S_ISDIR(mode)) {
                        int retval;
                        int pathlen = strlen(path);
-                       char *newbase = malloc(baselen + 1 + pathlen);
+                       char *newbase;
                        void *eltbuf;
                        char elttype[20];
                        unsigned long eltsize;
 
                        eltbuf = read_sha1_file(sha1, elttype, &eltsize);
-                       if (!eltbuf || strcmp(elttype, "tree"))
+                       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] = '/';
@@ -74,12 +77,13 @@ struct tree *lookup_tree(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 != tree_type) {
                error("Object %s is a %s, not a tree", 
                      sha1_to_hex(sha1), obj->type);
                return NULL;
@@ -87,23 +91,14 @@ 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;
@@ -116,17 +111,14 @@ int parse_tree(struct tree *item)
                    sscanf(bufptr, "%o", &mode) != 1)
                        return -1;
 
-               entry = malloc(sizeof(struct tree_entry_list));
+               entry = xmalloc(sizeof(struct tree_entry_list));
                entry->name = strdup(path + 1);
-               entry->directory = S_ISDIR(mode);
-               entry->executable = mode & S_IXUSR;
+               entry->directory = S_ISDIR(mode) != 0;
+               entry->executable = (mode & S_IXUSR) != 0;
+               entry->symlink = S_ISLNK(mode) != 0;
+               entry->mode = mode;
                entry->next = NULL;
 
-               /* Warn about trees that don't do the recursive thing.. */
-               if (strchr(path, '/')) {
-                       item->has_full_path = 1;
-               }
-
                bufptr += len + 20;
                size -= len + 20;
 
@@ -137,10 +129,34 @@ int parse_tree(struct tree *item)
                        entry->item.blob = lookup_blob(file_sha1);
                        obj = &entry->item.blob->object;
                }
-               add_ref(&item->object, obj);
+               if (obj)
+                       add_ref(&item->object, obj);
 
                *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;
+}