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, 3 insertions, 3 deletions

diff --git a/src/projections/eqearth.cpp b/src/projections/eqearth.cpp
index 2ef2775b..9600e039 100644
--- a/src/projections/eqearth.cpp
+++ b/src/projections/eqearth.cpp
@@ -110,7 +110,7 @@ static PJ_LP eqearth_e_inverse (PJ_XY xy, PJ *P) {           /* Ellipsoidal/sphe
     }
 
     if( i == 0 ) {
-        proj_context_errno_set( P->ctx, PJD_ERR_NON_CONVERGENT );
+        proj_context_errno_set( P->ctx, PROJ_ERR_COORD_TRANSFM_OUTSIDE_PROJECTION_DOMAIN );
         return lp;
     }
 
@@ -145,7 +145,7 @@ static PJ *destructor (PJ *P, int errlev) { /* Destructor */
 PJ *PROJECTION(eqearth) {
     struct pj_opaque *Q = static_cast<struct pj_opaque*>(calloc (1, sizeof (struct pj_opaque)));
     if (nullptr==Q)
-        return pj_default_destructor (P, ENOMEM);
+        return pj_default_destructor (P, PROJ_ERR_INVALID_OP /*ENOMEM*/);
     P->opaque = Q;
     P->destructor = destructor;
     P->fwd = eqearth_e_forward;
@@ -156,7 +156,7 @@ PJ *PROJECTION(eqearth) {
     if (P->es != 0.0) {
        Q->apa = pj_authset(P->es); /* For auth_lat(). */
        if (nullptr == Q->apa)
-          return destructor(P, ENOMEM);
+          return destructor(P, PROJ_ERR_INVALID_OP /*ENOMEM*/);
        Q->qp = pj_qsfn(1.0, P->e, P->one_es); /* For auth_lat(). */
        Q->rqda = sqrt(0.5*Q->qp); /* Authalic radius divided by major axis */
     }