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, 8 insertions, 5 deletions

diff --git a/cmake/ProjTest.cmake b/cmake/ProjTest.cmake
index 81ffcd42..7797ed83 100644
--- a/cmake/ProjTest.cmake
+++ b/cmake/ProjTest.cmake
@@ -2,6 +2,11 @@
 # add test with sh script
 #
 
+function(proj_test_set_properties TESTNAME)
+    set_tests_properties( ${TESTNAME}
+        PROPERTIES ENVIRONMENT "PROJ_IGNORE_USER_WRITABLE_DIRECTORY=YES;PROJ_LIB=${PROJECT_BINARY_DIR}/data/for_tests")
+endfunction()
+
 function(proj_add_test_script_sh SH_NAME BIN_USE)
   if(UNIX)
     get_filename_component(testname ${SH_NAME} NAME_WE)
@@ -26,8 +31,8 @@ function(proj_add_test_script_sh SH_NAME BIN_USE)
         COMMAND ${PROJECT_SOURCE_DIR}/test/cli/${SH_NAME}
         ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${${BIN_USE}}
       )
-    set_tests_properties( ${testname}
-        PROPERTIES ENVIRONMENT "PROJ_LIB=${PROJECT_BINARY_DIR}/data/for_tests")
+
+      proj_test_set_properties(${testname})
     endif()
 
   endif()
@@ -43,8 +48,6 @@ function(proj_add_gie_test TESTNAME TESTCASE)
       COMMAND ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${GIE_BIN}
       ${TESTFILE}
     )
-    set_tests_properties( ${TESTNAME}
-        PROPERTIES ENVIRONMENT "PROJ_LIB=${PROJECT_BINARY_DIR}/data/for_tests")
-
+    proj_test_set_properties(${TESTNAME})
 
 endfunction()