Introduce compatibility for cs2cs-style proj-strings into the 4D API.

Parameters such as towgs84, nadgrids and geoidgrids was previously only
handled by pj_transform(). This commit add a compatibility layer in
proj_create() by calling the pj_cs2cs_emulation_setup() function. This
function sets up a handful of predefined transformation objects on the
PJ object that is being created. Each of these transformation objects
are related to the cs2cs-style parameters we are trying to emulate in
the 4D API. That is, if the +towgs84 parameters is used we create
P->helmert with the parameters specified in +towgs84. Similarly for
+axis, +nadgrids and +geoidgrids. When these transformation objects
exists we use them in the prepare and finalize functions in pj_fwd/
pj_inv. If no cs2cs-style parametes are specified we skip those
parts of the prepare and finalizing steps.

Co-authored-by:Thomas Knudsen <thokn@sdfe.dk>
Co-authored-by:Kristian Evers <kristianevers@gmail.com>

1 files changed, 0 insertions, 23 deletions

diff --git a/src/pj_init.c b/src/pj_init.c
index f25c0344..51a742c7 100644
--- a/src/pj_init.c
+++ b/src/pj_init.c
@@ -769,26 +769,3 @@ pj_init_ctx(projCtx ctx, int argc, char **argv) {
     proj_errno_restore (PIN, err);
     return PIN;
 }
-
-
-
-/************************************************************************/
-/*                              pj_free()                               */
-/*                                                                      */
-/*      This is the application callable entry point for destroying     */
-/*      a projection definition.  It does work generic to all           */
-/*      projection types, and then calls the projection specific        */
-/*      free function, P->destructor(), to do local work.               */
-/*      In most cases P->destructor()==pj_default_destructor.           */
-/************************************************************************/
-
-void pj_free(PJ *P) {
-    if (0==P)
-        return;
-    /* free projection parameters - all the hard work is done by */
-    /* pj_default_destructor (in pj_malloc.c), which is supposed */
-    /* to be called as the last step of the local destructor     */
-    /* pointed to by P->destructor. In most cases,               */
-    /* pj_default_destructor actually *is* what is pointed to    */
-    P->destructor (P, 0);
-}