Fix HTML links that contain file extensions

[alexxy/gromacs.git] / src / gromacs / utility / stringutil.cpp

diff --git a/src/gromacs/utility/stringutil.cpp b/src/gromacs/utility/stringutil.cpp
index 82bf0a39de7f6e0beefcab95af2349e280a0eab2..6104225d3f174876a601a25c5e3c0e4c2719ddc5 100644 (file)
--- a/src/gromacs/utility/stringutil.cpp
+++ b/src/gromacs/utility/stringutil.cpp
@@ -174,6 +174,18 @@ std::string concatenateStrings(const char *const *sarray, size_t count)
 namespace
 {
 
+/*! \brief
+ * Helper function to identify word boundaries for replaceAllWords().
+ *
+ * \returns  `true` if the character is considered part of a word.
+ *
+ * \ingroup module_utility
+ */
+bool isWordChar(char c)
+{
+    return std::isalnum(c) || c == '-' || c == '_';
+}
+
 /*! \brief
  * Common implementation for string replacement functions.
  *
@@ -201,8 +213,8 @@ replaceInternal(const std::string &input, const char *from, const char *to,
         size_t matchEnd = matchPos + matchLength;
         if (bWholeWords)
         {
-            if (!((matchPos == 0 || !std::isalnum(input[matchPos-1]))
-                  && (matchEnd == input.length() || !std::isalnum(input[matchEnd]))))
+            if (!((matchPos == 0 || !isWordChar(input[matchPos-1]))
+                  && (matchEnd == input.length() || !isWordChar(input[matchEnd]))))
             {
                 matchPos = input.find(from, matchPos + 1);
                 continue;