rebase -i: learn to rebase root commit

diff --git a/path.c b/path.c
index 9df447bd6dcfaddf7f05fe5f0b624700ff1f40d7..a074aea64921eb1fb90f079ede9087e6b8109f6a 100644 (file)
--- a/path.c
+++ b/path.c
@@ -32,6 +32,60 @@ static char *cleanup_path(char *path)
        return path;
 }
 
+char *mksnpath(char *buf, size_t n, const char *fmt, ...)
+{
+       va_list args;
+       unsigned len;
+
+       va_start(args, fmt);
+       len = vsnprintf(buf, n, fmt, args);
+       va_end(args);
+       if (len >= n) {
+               strlcpy(buf, bad_path, n);
+               return buf;
+       }
+       return cleanup_path(buf);
+}
+
+static char *git_vsnpath(char *buf, size_t n, const char *fmt, va_list args)
+{
+       const char *git_dir = get_git_dir();
+       size_t len;
+
+       len = strlen(git_dir);
+       if (n < len + 1)
+               goto bad;
+       memcpy(buf, git_dir, len);
+       if (len && !is_dir_sep(git_dir[len-1]))
+               buf[len++] = '/';
+       len += vsnprintf(buf + len, n - len, fmt, args);
+       if (len >= n)
+               goto bad;
+       return cleanup_path(buf);
+bad:
+       strlcpy(buf, bad_path, n);
+       return buf;
+}
+
+char *git_snpath(char *buf, size_t n, const char *fmt, ...)
+{
+       va_list args;
+       va_start(args, fmt);
+       (void)git_vsnpath(buf, n, fmt, args);
+       va_end(args);
+       return buf;
+}
+
+char *git_pathdup(const char *fmt, ...)
+{
+       char path[PATH_MAX];
+       va_list args;
+       va_start(args, fmt);
+       (void)git_vsnpath(path, sizeof(path), fmt, args);
+       va_end(args);
+       return xstrdup(path);
+}
+
 char *mkpath(const char *fmt, ...)
 {
        va_list args;
@@ -348,7 +402,7 @@ int normalize_absolute_path(char *buf, const char *path)
                        goto next;
                }
 
-               memcpy(dst, comp_start, comp_len);
+               memmove(dst, comp_start, comp_len);
                dst += comp_len;
        next:
                comp_start = comp_end;
@@ -365,7 +419,7 @@ int normalize_absolute_path(char *buf, const char *path)
  * path = Canonical absolute path
  * prefix_list = Colon-separated list of absolute paths
  *
- * Determines, for each path in parent_list, whether the "prefix" really
+ * Determines, for each path in prefix_list, whether the "prefix" really
  * is an ancestor directory of path.  Returns the length of the longest
  * ancestor directory, excluding any trailing slashes, or -1 if no prefix
  * is an ancestor.  (Note that this means 0 is returned if prefix_list is