Hotfixes/int64 size (#24)

* Bug fix for integer shift size

* Bumping version

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## [2021-05-28 - Version 1.4.1](https://github.com/matajoh/libnpy/releases/tag/v1.4.1)
+
+Bug fixes:
+- Fixed a bug with integer shifting
+
 ## [2021-05-28 - Version 1.4.0](https://github.com/matajoh/libnpy/releases/tag/v1.4.0)
 
 Improvements:

RELEASE_NOTES

@@ -1,7 +1,2 @@
-Improvements:
-- Further minor CMake changes to improve ease of use
-- NPZ streams now have `is_open` methods to check for successful file opening
-- Minor code style changes
-
 Bug fixes:
-- NPZ files will now correctly handle PKZIP versions after 2.0, both for reading and writing
+- Fixed a bug with integer shifting

VERSION

@@ -1 +1 @@
-1.4.0
+1.4.1

src/npz.cpp

@@ -65,8 +65,8 @@ void write(std::ostream &stream, std::uint64_t value)
 
 std::uint16_t read16(std::istream &stream)
 {
-    std::uint8_t low = stream.get();
-    std::uint8_t high = stream.get();
+    std::uint16_t low = stream.get();
+    std::uint16_t high = stream.get();
     return low | (high << 8);
 }
 
@@ -76,7 +76,7 @@ std::uint32_t read32(std::istream &stream)
     int shift = 0;
     for (int i = 0; i < 4; ++i, shift += 8)
     {
-        std::uint8_t part = stream.get();
+        std::uint32_t part = stream.get();
         result |= part << shift;
     }
 
@@ -89,7 +89,7 @@ std::uint64_t read64(std::istream &stream)
     int shift = 0;
     for(int i=0; i<8; ++i, shift += 8)
     {
-        std::uint8_t part = stream.get();
+        std::uint64_t part = stream.get();
         result |= part << shift;
     }