clean up some coverity-identified issues, mostly uninitialized class …

…members

example/line_wrapping_filter.hpp

@@ -49,7 +49,7 @@ class line_wrapping_stdio_filter : public stdio_filter {
 class line_wrapping_input_filter : public input_filter {
 public:
     explicit line_wrapping_input_filter(int line_length = 80)
-        : line_length_(line_length), col_no_(0), has_next_(false)
+        : line_length_(line_length), col_no_(0), next_(0), has_next_(false)
         { }
 
     template<typename Source>
@@ -91,7 +91,7 @@ class line_wrapping_input_filter : public input_filter {
     int  line_length_;
     int  col_no_;
     int  next_;
-    int  has_next_;
+    bool has_next_;
 };
 
 class line_wrapping_output_filter : public output_filter {

include/boost/iostreams/detail/adapter/direct_adapter.hpp

@@ -58,6 +58,7 @@ class direct_adapter_base {
     explicit direct_adapter_base(const Direct& d);
     typedef is_convertible<category, two_sequence> is_double;
     struct pointers {
+        pointers() : beg(0), ptr(0), end(0) { }
         char_type *beg, *ptr, *end;
     };
     void init_input(mpl::true_);

include/boost/iostreams/detail/buffer.hpp

@@ -205,7 +205,7 @@ void basic_buffer<Ch, Alloc>::swap(basic_buffer& rhs)
 
 template<typename Ch, typename Alloc>
 buffer<Ch, Alloc>::buffer(std::streamsize buffer_size)
-    : basic_buffer<Ch, Alloc>(buffer_size) { }
+    : basic_buffer<Ch, Alloc>(buffer_size), ptr_(data()), eptr_(data() + buffer_size) { }
 
 template<typename Ch, typename Alloc>
 inline void buffer<Ch, Alloc>::set(std::streamsize ptr, std::streamsize end)

src/lzma.cpp

@@ -75,7 +75,7 @@ void lzma_error::check BOOST_PREVENT_MACRO_SUBSTITUTION(int error)
 namespace detail {
 
 lzma_base::lzma_base()
-    : stream_(new lzma_stream)
+    : stream_(new lzma_stream), level(lzma::default_compression)
     { }
 
 lzma_base::~lzma_base() { delete static_cast<lzma_stream*>(stream_); }

src/zlib.cpp

@@ -91,7 +91,8 @@ void zlib_error::check BOOST_PREVENT_MACRO_SUBSTITUTION(int error)
 namespace detail {
 
 zlib_base::zlib_base()
-    : stream_(new z_stream), calculate_crc_(false), crc_(0), crc_imp_(0)
+    : stream_(new z_stream), calculate_crc_(false), crc_(0), crc_imp_(0),
+      total_in_(0), total_out_(0)
     { }
 
 zlib_base::~zlib_base() { delete static_cast<z_stream*>(stream_); }

test/detail/temp_file.hpp

@@ -34,7 +34,7 @@ class temp_file {
 
     // Constructs a temp file which does not initially exist.
     temp_file() { set_name(); }
-    ~temp_file() { std::remove(name_.c_str()); }
+    ~temp_file() { (void)std::remove(name_.c_str()); }
     const ::std::string name() const { return name_; }
     operator const ::std::string() const { return name_; }
 private:

test/mapped_file_test.cpp

@@ -289,7 +289,7 @@ void mapped_file_test()
     {
         boost::iostreams::test::test_file orig;
         char name[50];
-        std::strcpy(name, orig.name().c_str());
+        std::strncpy(name, orig.name().c_str(), 50);
 
         mapped_file mf((char*) name);