LibHFZ downloads

Changes:

• Changed implementation of hfzLoad and hfzLoadEx functions such that the file header argument is nulled with a call to hfzHeader_Init rather than hfzHeader_Reset. Callers are now responsible for ensuring that headers have been reset if they have been initialised prior to any calls to hfzLoad or hfzLoadEx (Thanks Enge!)

Changes:

• Bug-fix for hfzRead to return number of bytes written when in binary mode. Previously, hfzRead was returning 1 when in binary mode and the number of bytes written when in gzip mode (thanks Joe!)

Changes:

• Bug-fixes for memory leaks in hfzReadHeader and hfzByteSwap (Thanks Gregery!)

Changes:

• Added hfzReadTile2 and hfzWriteTile2 functions, which use handles to tile-sized blocks of memory, as opposed to the map-sized blocks used in hfzReadTile / hfzWriteTile.

Changes:

• Critical bugfix for hfzWriteTile function, which was incorrectly calculating the maximum altitude for tiles.

Changes:

• Revised hfzOpen, hfzRead, hfzWrite and hfzClose to be overridable by setting the hfzFopenProc, hfzFreadProc, hfzFwriteProc and hfzFcloseProc function handles.
• Added hfzMalloc, hfzMemcpy and hfzFree, which are overridable by setting the hfzMallocProc, hfzMemcpyProc and hfzFreeProc function handles.

Changes:

• Added callbacks parameter to hfzSave, hfzLoad and hfzLoadEx.

Changes:

• Added progress/cancellation callbacks to hfzSave, hfzLoad and hfzLoadEx.
• Added support for big-endian platforms via hfzSetLocalByteOrder (needs more testing?)

Changes:

• Fixed nasty bug in hfzExtHeaderBlock_InitEx.

Changes:

• Removed old 'hfzSave' function, and renamed hfzSaveEx to hfzSave.
• Added hfzHeader_Init
• Added hfzHeader_EncodeExtHeaderBuf
• Added hfzHeader_DecodeExtHeaderBuf
• Added hfzExtHeaderBlock_Init
• Added hfzExtHeaderBlock_InitEx
• Added hfzExtHeaderBlock_Reset
• Renamed 'hfzHeaderReset' to hfzHeader_Reset (for consistency)

Changes:

• Added hfzSaveEx function.
• Added LIBHFZ_ prefix to defined error codes and formats.
• Changed use of ints to longs.

Changes:

• Fixed hfzWrite for non-compressed streams (prevented write of HF2)
• Fixed hfzWriteTile for tiles that are 'short' in x-axis.
• Changed HfzFile struct. Now not using union.