X-Git-Url: https://git.octo.it/?p=git.git;a=blobdiff_plain;f=tree-walk.c;h=297c6972b9256578f9cd7a92404dda55c8e34a2e;hp=9f7abb7cb352241191e395e3967730f3bdcf6d55;hb=HEAD;hpb=5c87a8c5602eb09810679dd3e0bcfc7ae1fed111

diff --git a/tree-walk.c b/tree-walk.c
index 9f7abb7c..297c6972 100644
--- 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;
 
@@ -47,22 +47,66 @@ void update_tree_entry(struct tree_desc *desc)
 	desc->size = size - len;
 }
 
+static const char *get_mode(const char *str, unsigned int *modep)
+{
+	unsigned char c;
+	unsigned int mode = 0;
+
+	while ((c = *str++) != ' ') {
+		if (c < '0' || c > '7')
+			return NULL;
+		mode = (mode << 3) + (c - '0');
+	}
+	*modep = mode;
+	return str;
+}
+
 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;
-	const char *path = strchr(tree, ' ');
+	const char *path;
 	unsigned int mode;
 
-	if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
+	path = get_mode(tree, &mode);
+	if (!path || size < len + 20)
 		die("corrupt tree file");
-	*pathp = path+1;
+	*pathp = path;
 	*modep = canon_mode(mode);
 	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));