libiberty.h (countargv): Declare.

include/
	* libiberty.h (countargv): Declare.

	libiberty/
	* argv.c (countargv): New function.

From-SVN: r179318

include/ChangeLog

@@ -1,3 +1,7 @@
+2011-09-28  Doug Evans  <dje@google.com>
+
+	* libiberty.h (countargv): Declare.
+
 2011-09-26  Cary Coutant  <ccoutant@google.com>
 
 	PR lto/47247

include/libiberty.h

@@ -91,6 +91,10 @@ extern void expandargv PARAMS ((int *, char ***));
 
 extern int writeargv PARAMS ((char **, FILE *));
 
+/* Return the number of elements in argv.  */
+
+extern int countargv (char**);
+
 /* Return the last component of a path name.  Note that we can't use a
    prototype here because the parameter is declared inconsistently
    across different systems, sometimes as "char *" and sometimes as

libiberty/ChangeLog

@@ -1,3 +1,7 @@
+2011-09-28  Doug Evans  <dje@google.com>
+
+	* argv.c (countargv): New function.
+
 2011-09-23  Cary Coutant  <ccoutant@google.com>
 
 	PR 40831

libiberty/argv.c

@@ -492,6 +492,29 @@ expandargv (int *argcp, char ***argvp)
     }
 }
 
+/*
+
+@deftypefn Extension int countargv (char **@var{argv})
+
+Return the number of elements in @var{argv}.
+Returns zero if @var{argv} is NULL.
+
+@end deftypefn
+
+*/
+
+int
+countargv (char **argv)
+{
+  int argc;
+
+  if (argv == NULL)
+    return 0;
+  for (argc = 0; argv[argc] != NULL; argc++)
+    continue;
+  return argc;
+}
+
 #ifdef MAIN
 
 /* Simple little test driver. */