Convert 0 to nullptr where it's used as a pointer value

To make the code easier to read, because this means the remaining zeros
all mean numbers.

Change-Id: I4c904506b56946d9f14ac64381995d2bdbdf1e50

12 files changed, 17 insertions, 17 deletions

diff --git a/src/conv/html/abw2html.cpp b/src/conv/html/abw2html.cpp
index 457e795..4b8f67d 100644
--- a/src/conv/html/abw2html.cpp
+++ b/src/conv/html/abw2html.cpp
@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
   if (argc < 2)
     return printUsage();
 
-  char *file = 0;
+  char *file = nullptr;
 
   for (int i = 1; i < argc; i++)
   {
diff --git a/src/conv/raw/abw2raw.cpp b/src/conv/raw/abw2raw.cpp
index 3d71bd2..5c67e92 100644
--- a/src/conv/raw/abw2raw.cpp
+++ b/src/conv/raw/abw2raw.cpp
@@ -53,7 +53,7 @@ int printVersion()
 int main(int argc, char *argv[])
 {
   bool printIndentLevel = false;
-  char *file = 0;
+  char *file = nullptr;
 
   if (argc < 2)
     return printUsage();
diff --git a/src/conv/text/abw2text.cpp b/src/conv/text/abw2text.cpp
index aed75dc..37b57b9 100644
--- a/src/conv/text/abw2text.cpp
+++ b/src/conv/text/abw2text.cpp
@@ -53,7 +53,7 @@ int main(int argc, char *argv[])
   if (argc < 2)
     return printUsage();
 
-  char *szInputFile = 0;
+  char *szInputFile = nullptr;
   bool isInfo = false;
 
   for (int i = 1; i < argc; i++)
diff --git a/src/lib/ABWContentCollector.cpp b/src/lib/ABWContentCollector.cpp
index 8d09a26..af9717e 100644
--- a/src/lib/ABWContentCollector.cpp
+++ b/src/lib/ABWContentCollector.cpp
@@ -2193,7 +2193,7 @@ void libabw::ABWContentCollector::openFrame(const char *props, const char *image
 
 void libabw::ABWContentCollector::closeFrame(libabw::ABWOutputElements *(&elements), bool &pageFrame)
 {
-  elements=0;
+  elements=nullptr;
   pageFrame=false;
   if (m_ps->m_isNote)
   {
diff --git a/src/lib/ABWOutputElements.cpp b/src/lib/ABWOutputElements.cpp
index b315533..35e8ae0 100644
--- a/src/lib/ABWOutputElements.cpp
+++ b/src/lib/ABWOutputElements.cpp
@@ -823,7 +823,7 @@ void libabw::ABWOpenPageSpanElement::_writeElements(librevenge::RVNGTextInterfac
 
   for (OutputElements_t::const_iterator iterVec = iterMap->second.begin();
        iterVec != iterMap->second.end(); ++iterVec)
-    (*iterVec)->write(iface, 0, 0);
+    (*iterVec)->write(iface, nullptr, nullptr);
 }
 
 void libabw::ABWOpenParagraphElement::write(librevenge::RVNGTextInterface *iface,
@@ -893,7 +893,7 @@ void libabw::ABWOpenUnorderedListLevelElement::write(librevenge::RVNGTextInterfa
 // ABWOutputElements
 
 libabw::ABWOutputElements::ABWOutputElements()
-  : m_bodyElements(), m_headerElements(), m_footerElements(), m_elements(0)
+  : m_bodyElements(), m_headerElements(), m_footerElements(), m_elements(nullptr)
 {
   m_elements = &m_bodyElements;
 }
diff --git a/src/lib/ABWParser.cpp b/src/lib/ABWParser.cpp
index 5867855..7d251af 100644
--- a/src/lib/ABWParser.cpp
+++ b/src/lib/ABWParser.cpp
@@ -665,7 +665,7 @@ void libabw::ABWParser::readCloseFrame()
 {
   if (!m_collector)
     return;
-  ABWOutputElements *elements=0;
+  ABWOutputElements *elements=nullptr;
   bool pageFrame=false;
   m_collector->closeFrame(elements,pageFrame);
   if (m_state->m_inStyleParsing)
diff --git a/src/lib/ABWStylesCollector.cpp b/src/lib/ABWStylesCollector.cpp
index 773a85b..b3215b9 100644
--- a/src/lib/ABWStylesCollector.cpp
+++ b/src/lib/ABWStylesCollector.cpp
@@ -102,7 +102,7 @@ static int abw_unichar_to_utf8(unsigned c, char *outbuf)
 
 static void appendUCS4(librevenge::RVNGString &str, unsigned ucs4)
 {
-  int charLength = abw_unichar_to_utf8(ucs4, 0);
+  int charLength = abw_unichar_to_utf8(ucs4, nullptr);
   std::vector<char> utf8(charLength+1);
   utf8[charLength] = '\0';
   abw_unichar_to_utf8(ucs4, utf8.data());
diff --git a/src/lib/ABWStylesCollector.h b/src/lib/ABWStylesCollector.h
index ea13f42..bc7ba42 100644
--- a/src/lib/ABWStylesCollector.h
+++ b/src/lib/ABWStylesCollector.h
@@ -91,7 +91,7 @@ public:
   void openFrame(const char *, const char *, const char *, const char *) override {}
   void closeFrame(ABWOutputElements *(&elements), bool &) override
   {
-    elements=0;
+    elements=nullptr;
   }
   void addFrameElements(ABWOutputElements &, bool) override {}
 
diff --git a/src/lib/ABWXMLHelper.cpp b/src/lib/ABWXMLHelper.cpp
index fe8638e..3f82938 100644
--- a/src/lib/ABWXMLHelper.cpp
+++ b/src/lib/ABWXMLHelper.cpp
@@ -131,7 +131,7 @@ void ABWXMLProgressWatcher::signalError()
 std::unique_ptr<xmlTextReader, void(*)(xmlTextReaderPtr)> xmlReaderForStream(librevenge::RVNGInputStream *input, ABWXMLProgressWatcher *watcher)
 {
   std::unique_ptr<xmlTextReader, void(*)(xmlTextReaderPtr)> reader(
-    xmlReaderForIO(abwxmlInputReadFunc, abwxmlInputCloseFunc, (void *)input, 0, 0,
+    xmlReaderForIO(abwxmlInputReadFunc, abwxmlInputCloseFunc, (void *)input, nullptr, nullptr,
                    XML_PARSE_NOBLANKS|XML_PARSE_NOENT|XML_PARSE_NONET|XML_PARSE_RECOVER),
     xmlFreeTextReader);
   if (watcher)
diff --git a/src/lib/ABWXMLHelper.h b/src/lib/ABWXMLHelper.h
index b657b19..0c2c8fc 100644
--- a/src/lib/ABWXMLHelper.h
+++ b/src/lib/ABWXMLHelper.h
@@ -56,7 +56,7 @@ private:
 };
 
 // create an xmlTextReader pointer from a librevenge::RVNGInputStream pointer
-std::unique_ptr<xmlTextReader, void(*)(xmlTextReaderPtr)> xmlReaderForStream(librevenge::RVNGInputStream *input, ABWXMLProgressWatcher *watcher = 0);
+std::unique_ptr<xmlTextReader, void(*)(xmlTextReaderPtr)> xmlReaderForStream(librevenge::RVNGInputStream *input, ABWXMLProgressWatcher *watcher = nullptr);
 
 } // namespace libabw
 
diff --git a/src/lib/ABWZlibStream.cpp b/src/lib/ABWZlibStream.cpp
index 9cffe78..0419448 100644
--- a/src/lib/ABWZlibStream.cpp
+++ b/src/lib/ABWZlibStream.cpp
@@ -80,7 +80,7 @@ static bool getInflatedBuffer(librevenge::RVNGInputStream *input, std::vector<un
 
 ABWZlibStream::ABWZlibStream(librevenge::RVNGInputStream *input) :
   librevenge::RVNGInputStream(),
-  m_input(0),
+  m_input(nullptr),
   m_offset(0),
   m_buffer()
 {
@@ -104,7 +104,7 @@ const unsigned char *ABWZlibStream::read(unsigned long numBytes, unsigned long &
   numBytesRead = 0;
 
   if (numBytes == 0)
-    return 0;
+    return nullptr;
 
   unsigned long numBytesToRead;
 
@@ -116,7 +116,7 @@ const unsigned char *ABWZlibStream::read(unsigned long numBytes, unsigned long &
   numBytesRead = numBytesToRead; // about as paranoid as we can be..
 
   if (numBytesToRead == 0)
-    return 0;
+    return nullptr;
 
   long oldOffset = m_offset;
   m_offset += numBytesToRead;
diff --git a/src/lib/ABWZlibStream.h b/src/lib/ABWZlibStream.h
index faef028..e8ba4ee 100644
--- a/src/lib/ABWZlibStream.h
+++ b/src/lib/ABWZlibStream.h
@@ -32,7 +32,7 @@ public:
   }
   const char *subStreamName(unsigned) override
   {
-    return 0;
+    return nullptr;
   }
   bool existsSubStream(const char *) override
   {
@@ -40,11 +40,11 @@ public:
   }
   librevenge::RVNGInputStream *getSubStreamByName(const char *) override
   {
-    return 0;
+    return nullptr;
   }
   librevenge::RVNGInputStream *getSubStreamById(unsigned) override
   {
-    return 0;
+    return nullptr;
   }
   const unsigned char *read(unsigned long numBytes, unsigned long &numBytesRead) override;
   int seek(long offset, librevenge::RVNG_SEEK_TYPE seekType) override;