From 6a9073a0cbcbb5b8519988f693d9387d5c9febeb Mon Sep 17 00:00:00 2001
From: Richard Berger <richard.berger@temple.edu>
Date: Thu, 11 Jun 2020 13:50:26 -0400
Subject: [PATCH] Add count_words for C-Strings

---
 src/utils.cpp | 14 +++++++++++---
 src/utils.h   |  8 ++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/utils.cpp b/src/utils.cpp
index 86f56e7b2a..88677bf542 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -365,12 +365,12 @@ std::string utils::trim_comment(const std::string & line) {
 }
 
 /* ----------------------------------------------------------------------
-   Return number of words
+   return number of words
 ------------------------------------------------------------------------- */
 
-size_t utils::count_words(const std::string & text) {
+size_t utils::count_words(const char * text) {
   size_t count = 0;
-  const char * buf = text.c_str();
+  const char * buf = text;
   char c = *buf;
 
   while (c) {
@@ -393,6 +393,14 @@ size_t utils::count_words(const std::string & text) {
   return count;
 }
 
+/* ----------------------------------------------------------------------
+   return number of words
+------------------------------------------------------------------------- */
+
+size_t utils::count_words(const std::string & text) {
+  return utils::count_words(text.c_str());
+}
+
 /* ----------------------------------------------------------------------
    Return number of words
 ------------------------------------------------------------------------- */
diff --git a/src/utils.h b/src/utils.h
index bce9ff3e66..ef272087b7 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -166,6 +166,14 @@ namespace LAMMPS_NS {
      */
     size_t count_words(const std::string & text);
 
+    /**
+     * \brief Count words in C-string, ignore any whitespace matching " \t\r\n\f"
+     * \param text string that should be searched
+     * \param separators string containing characters that will be treated as whitespace
+     * \return number of words found
+     */
+    size_t count_words(const char * text);
+
     /**
      * \brief Count words in a single line, trim anything from '#' onward
      * \param text string that should be trimmed and searched