Refactoring: remove implicit conversion from QCString to const char *

This commit changes the following in relation to string use
- The implicit convert from 'QCString' to 'const char *' is removed
- Strings parameters use 'const QCString &' as much as possible in favor
  over 'const char *'
- 'if (s)' where s is a QCString has been replaced by 'if(!s.isEmpty())'
- data() now always returns a valid C-string and not a 0-pointer.
- when passing a string 's' to printf and related functions 'qPrint(s)' is
  used instead of 's.data()'
- for empty string arguments 'QCString()' is used instead of '0'
- The copy() operation has been removed
- Where possible 'qstrcmp(a,b)==0' has been replaces by 'a==b' and
  'qstrcmp(a,b)<0' has been replaced by 'a<b'
- Parameters of string type that were default initialized with '= 0' are
  no initialized with '= QCString()'

1 files changed, 5 insertions, 5 deletions

diff --git a/src/mandocvisitor.cpp b/src/mandocvisitor.cpp
index 894c910..d565648 100644
--- a/src/mandocvisitor.cpp
+++ b/src/mandocvisitor.cpp
@@ -29,7 +29,7 @@
 #include "fileinfo.h"
 
 ManDocVisitor::ManDocVisitor(TextStream &t,CodeOutputInterface &ci,
-                             const char *langExt)
+                             const QCString &langExt)
   : DocVisitor(DocVisitor_Man), m_t(t), m_ci(ci), m_insidePre(FALSE), m_hide(FALSE), m_firstCol(FALSE),
     m_indent(0), m_langExt(langExt)
 {
@@ -371,7 +371,7 @@ void ManDocVisitor::visit(DocIncOperator *op)
   if (locLangExt.isEmpty()) locLangExt = m_langExt;
   SrcLangExt langExt = getLanguageFromFileName(locLangExt);
   //printf("DocIncOperator: type=%d first=%d, last=%d text='%s'\n",
-  //    op->type(),op->isFirst(),op->isLast(),op->text().data());
+  //    op->type(),op->isFirst(),op->isLast(),qPrint(op->text()));
   if (op->isFirst())
   {
     if (!m_hide)
@@ -1049,11 +1049,11 @@ void ManDocVisitor::visitPost(DocParBlock *)
 }
 
 
-void ManDocVisitor::filter(const char *str)
+void ManDocVisitor::filter(const QCString &str)
 {
-  if (str)
+  if (!str.isEmpty())
   {
-    const char *p=str;
+    const char *p=str.data();
     char c=0;
     while ((c=*p++))
     {