Merge RFC4 (#1865)

This commit is the result of the squashing of rfc4_dev branch in a single
commit. It implements mostly RFC 4 related work.

* Grid handling:
  - remove obsolete and presumably unfinished implementation of grid catalog functionality
  - all grid functionality is in grids.cpp/.hpp
  - vertical and horizontal grid shift: rework to no longer load whole grid into memory
  - remove hgrids and vgrids member from PJ structure, and store them in hgridshift/vgridshift/deformation structures
  - build systems: add optional libtiff dependency. Must be explicitly disabled if not desired
  - add support for horizontal and vertical grids in GeoTIFF, if libtiff is available
  - add GenericShiftGridSet and GenericShiftGrid classes, relying on TIFF grids, that can be used for generic purpose grid-based adjustment
  - add a +proj=xyzgridshift method to perform geocentric translation by grid. Used for French NTF to RGF93 transformation using gr3df97a.tif grid
  - deformation: add support for +grids= for GeoTIFF grids
  - horizontal grid shift: fix failures on points slightly outside a subgrid (fixes #209)

* File management:
  - add a filemanager.cpp/.hpp to deal with file related work
  - test for legacy proj_api.h fileapi
  - proj.h: add proj_context_set_fileapi() and proj_context_set_sqlite3_vfs_name() (fixes #866)
  - add capability to read resource files from the user writable directory

* Network access:
  - build systems: add optional curl dependency
  - add a curl-based default implementation for network related functionality
  - proj.h: add C API to control network functionality, and optionaly provide network callbacks
  - add data/proj.ini with default settings
  - add a SQLite3 local cache of downloaded chunks
  - add proj_is_download_needed() and proj_download_file()

* Use Win32 Unicode APIs and expect all strings to be UTF-8 (fixes #1765)
  For backward compatibility, if PROJ_LIB content is found to be not UTF-8 or
  pointing to a non existing directory, then an attempt at interpretating it
  in the ANSI page encoding is done.
  proj_context_set_search_paths() now assumes strings to be in UTF-8, and
  functions returning paths will also return values in UTF-8.

1 files changed, 23 insertions, 11 deletions

diff --git a/src/lib_proj.cmake b/src/lib_proj.cmake
index 2e470683..704ece3d 100644
--- a/src/lib_proj.cmake
+++ b/src/lib_proj.cmake
@@ -198,6 +198,7 @@ set(SRC_LIBPROJ_TRANSFORMATIONS
   transformations/horner.cpp
   transformations/molodensky.cpp
   transformations/vgridshift.cpp
+  transformations/xyzgridshift.cpp
 )
 
 set(SRC_LIBPROJ_ISO19111
@@ -219,8 +220,6 @@ set(SRC_LIBPROJ_CORE
   4D_api.cpp
   aasincos.cpp
   adjlon.cpp
-  apply_gridshift.cpp
-  apply_vgridshift.cpp
   auth.cpp
   ctx.cpp
   datum_set.cpp
@@ -234,13 +233,9 @@ set(SRC_LIBPROJ_CORE
   fileapi.cpp
   fwd.cpp
   gauss.cpp
-  gc_reader.cpp
   geocent.cpp
   geocent.h
   geodesic.c
-  gridcatalog.cpp
-  gridinfo.cpp
-  gridlist.cpp
   init.cpp
   initcache.cpp
   internal.cpp
@@ -251,10 +246,6 @@ set(SRC_LIBPROJ_CORE
   mlfn.cpp
   msfn.cpp
   mutex.cpp
-  nad_cvt.cpp
-  nad_init.cpp
-  nad_intr.cpp
-  open_lib.cpp
   param.cpp
   phi2.cpp
   pipeline.cpp
@@ -285,6 +276,13 @@ set(SRC_LIBPROJ_CORE
   proj_json_streaming_writer.hpp
   proj_json_streaming_writer.cpp
   tracing.cpp
+  grids.hpp
+  grids.cpp
+  filemanager.hpp
+  filemanager.cpp
+  networkfilemanager.cpp
+  sqlite3_utils.hpp
+  sqlite3_utils.cpp
   ${CMAKE_CURRENT_BINARY_DIR}/proj_config.h
 )
 
@@ -348,6 +346,10 @@ target_compile_options(${PROJ_CORE_TARGET}
   PRIVATE $<$<COMPILE_LANGUAGE:CXX>:${PROJ_CXX_WARN_FLAGS}>
 )
 
+if(MSVC OR MINGW)
+    target_compile_definitions(${PROJ_CORE_TARGET} PRIVATE -DNOMINMAX)
+endif()
+
 # Tell Intel compiler to do arithmetic accurately.  This is needed to stop the
 # compiler from ignoring parentheses in expressions like (a + b) + c and from
 # simplifying 0.0 + x to x (which is wrong if x = -0.0).
@@ -419,9 +421,19 @@ if(USE_THREAD AND Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
   target_link_libraries(${PROJ_CORE_TARGET} ${CMAKE_THREAD_LIBS_INIT})
 endif()
 
-include_directories(${SQLITE3_INCLUDE_DIR})
+target_include_directories(${PROJ_CORE_TARGET} PRIVATE ${SQLITE3_INCLUDE_DIR})
 target_link_libraries(${PROJ_CORE_TARGET} ${SQLITE3_LIBRARY})
 
+if(NOT DISABLE_TIFF)
+  target_include_directories(${PROJ_CORE_TARGET} PRIVATE ${TIFF_INCLUDE_DIR})
+  target_link_libraries(${PROJ_CORE_TARGET} ${TIFF_LIBRARY})
+endif()
+
+if(CURL_FOUND)
+  target_include_directories(${PROJ_CORE_TARGET} PRIVATE ${CURL_INCLUDE_DIR})
+  target_link_libraries(${PROJ_CORE_TARGET} ${CURL_LIBRARY})
+endif()
+
 if(MSVC AND BUILD_LIBPROJ_SHARED)
   target_compile_definitions(${PROJ_CORE_TARGET}
     PRIVATE PROJ_MSVC_DLL_EXPORT=1)