Re: patch adding argz_add and argz_count implementation

[Karl Berry]

    Good, except that I'd prefer if argz_count used strlen instead of

Ok, since you prefer it, I copied the strlen loop from libc.  Below is a
revised patch (for both files for convenience).

    I'll change the name in Libtool after 2.2.  Maybe I'll even change it to
    use gnulib-tool ...

If you start maintaining the argz files with gnulib as the master,
please tell me so I can stop syncing from libtool to gnulib :).

Thanks,
karl


--- a/lib/argz_.h
+++ b/lib/argz_.h
@@ -1,6 +1,6 @@
 /* lt__argz.h -- internal argz interface for non-glibc systems
 
-   Copyright (C) 2004, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2007, 2008 Free Software Foundation, Inc.
    Written by Gary V. Vaughan, 2004
 
    NOTE: The canonical source of this file is maintained with the
@@ -49,6 +49,8 @@ extern "C" {
 
 LT_SCOPE error_t argz_append   (char **pargz, size_t *pargz_len,
                                 const char *buf, size_t buf_len);
+LT_SCOPE error_t argz_add       (char **pargz, size_t *pargz_len,
+                                 const char *str);
 LT_SCOPE error_t argz_create_sep(const char *str, int delim,
                                 char **pargz, size_t *pargz_len);
 LT_SCOPE error_t argz_insert   (char **pargz, size_t *pargz_len,
@@ -56,6 +58,7 @@ LT_SCOPE error_t argz_insert  (char **pargz, size_t 
*pargz_len,
 LT_SCOPE char *         argz_next      (char *argz, size_t argz_len,
                                 const char *entry);
 LT_SCOPE void   argz_stringify (char *argz, size_t argz_len, int sep);
+LT_SCOPE size_t  argz_count     (const char *argz, size_t argz_len);
 
 #if defined(__cplusplus)
 }
--- a/lib/argz.c
+++ b/lib/argz.c
@@ -1,6 +1,6 @@
 /* argz.c -- argz implementation for non-glibc systems
 
-   Copyright (C) 2004, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
    Written by Gary V. Vaughan, 2004
 
    NOTE: The canonical source of this file is maintained with the
@@ -76,6 +76,14 @@ argz_append (char **pargz, size_t *pargz_len, const char 
*buf, size_t buf_len)
 }
 
 
+/* Add a string to the argz vector.  */
+error_t
+argz_add (char **pargz, size_t *pargz_len, const char *str)
+{
+  return argz_append (pargz, pargz_len, str, strlen (str) + 1);
+}
+
+
 error_t
 argz_create_sep (const char *str, int delim, char **pargz, size_t *pargz_len)
 {
@@ -223,3 +231,24 @@ argz_stringify (char *argz, size_t argz_len, int sep)
        }
     }
 }
+
+
+/* Count number of elements (null bytes) in argz vector.  */
+
+size_t
+argz_count (const char *argz, size_t argz_len)
+{
+  size_t count = 0;
+
+  assert ((argz && argz_len) || (!argz && !argz_len));
+  
+  while (argz_len > 0)
+    {
+      size_t part_len = strlen (argz);
+      argz += part_len + 1;
+      argz_len -= part_len + 1;
+      count++;
+    }
+  
+  return count;
+}