Revise error codes to have a reduced set exposed in the public API.

Fixes #2482

And also add proj_context_errno_string()

Revise gie 'expect failure errno XXXX' strings

1 files changed, 2 insertions, 2 deletions

diff --git a/src/projections/cass.cpp b/src/projections/cass.cpp
index f5531f6a..9902f9d7 100644
--- a/src/projections/cass.cpp
+++ b/src/projections/cass.cpp
@@ -113,12 +113,12 @@ PJ *PROJECTION(cass) {
     /* otherwise it's ellipsoidal */
     P->opaque = static_cast<struct pj_opaque*>(calloc (1, sizeof (struct pj_opaque)));
     if (nullptr==P->opaque)
-        return pj_default_destructor (P, ENOMEM);
+        return pj_default_destructor (P, PROJ_ERR_INVALID_OP /*ENOMEM*/);
     P->destructor = destructor;
 
     static_cast<struct pj_opaque*>(P->opaque)->en = pj_enfn (P->es);
     if (nullptr==static_cast<struct pj_opaque*>(P->opaque)->en)
-        return pj_default_destructor (P, ENOMEM);
+        return pj_default_destructor (P, PROJ_ERR_INVALID_OP /*ENOMEM*/);
 
     static_cast<struct pj_opaque*>(P->opaque)->m0 = pj_mlfn (P->phi0,  sin (P->phi0),  cos (P->phi0),  static_cast<struct pj_opaque*>(P->opaque)->en);
     P->inv = cass_e_inverse;