expose nc_rc_set, nc_rc_get (via rc_set, rc_get module functions).

.github/workflows/cibuildwheel.yml

@@ -60,7 +60,7 @@ jobs:
           - os: macos-14
             arch: arm64
             CIBW_ENVIRONMENT: MACOSX_DEPLOYMENT_TARGET=14.0
-          - os: macos-11
+          - os: macos-13
             arch: x86_64
             CIBW_ENVIRONMENT: MACOSX_DEPLOYMENT_TARGET=11.0
 

include/netCDF4.pxi

@@ -392,6 +392,7 @@ cdef extern from "netcdf-compat.h":
     int nc_set_alignment(int threshold, int alignment)
     int nc_get_alignment(int *threshold, int *alignment)
     int nc_rc_set(char* key, char* value) nogil
+    const_char_ptr *nc_rc_get(char* key) 
 
     int nc_open_mem(const char *path, int mode, size_t size, void* memory, int *ncidp) nogil
     int nc_create_mem(const char *path, int mode, size_t initialize, int *ncidp) nogil

src/netCDF4/__init__.py

@@ -10,10 +10,10 @@
                        __has_parallel4_support__, __has_pnetcdf_support__,
                        __has_quantization_support__, __has_zstandard_support__,
                        __has_bzip2_support__, __has_blosc_support__, __has_szip_support__,
-                       __has_set_alignment__)
+                       __has_set_alignment__, __has_nc_rc_set__)
 import os
 __all__ =\
-['Dataset','Variable','Dimension','Group','MFDataset','MFTime','CompoundType','VLType','date2num','num2date','date2index','stringtochar','chartostring','stringtoarr','getlibversion','EnumType','get_chunk_cache','set_chunk_cache','set_alignment','get_alignment']
+['Dataset','Variable','Dimension','Group','MFDataset','MFTime','CompoundType','VLType','date2num','num2date','date2index','stringtochar','chartostring','stringtoarr','getlibversion','EnumType','get_chunk_cache','set_chunk_cache','set_alignment','get_alignment','nc_get','nc_set']
 __pdoc__ = {
     'utils': False,
 }

src/netCDF4/_netCDF4.pyx

@@ -1308,15 +1308,56 @@ __has_blosc_support__ = HAS_BLOSC_SUPPORT
 __has_szip_support__ = HAS_SZIP_SUPPORT
 __has_set_alignment__ = HAS_SET_ALIGNMENT
 __has_ncfilter__ = HAS_NCFILTER
+__has_nc_rc_set__ = HAS_NCRCSET
 
 
 # set path to SSL certificates (issue #1246)
 # available starting in version 4.9.1
-if HAS_NCRCSET:
+if __has_nc_rc_set__:
     import certifi
     if nc_rc_set("HTTP.SSL.CAINFO", _strencode(certifi.where())) != 0:
         raise RuntimeError('error setting path to SSL certificates')
 
+def rc_get(key):
+    """
+**`rc_key(key)`**
+
+Returns the internal netcdf-c rc table value corresponding to key.
+    """
+    cdef int ierr
+    cdef char *keyc
+    if __has_nc_rc_set__:
+        bytestr = _strencode(_tostr(key))
+        keyc = bytestr
+        return (<char *>nc_rc_get(keyc)).decode('utf-8')
+    else:
+        raise RuntimeError(
+            "This function requires netcdf4 4.9.0+ to be used at compile time"
+        )
+
+def rc_set(key, value):
+    """
+**`rc_set(key, value)`**
+
+Sets the internal netcdf-c rc table value corresponding to key.
+    """
+    cdef int ierr
+    cdef char *keyc
+    cdef char *valuec
+    if __has_nc_rc_set__:
+        key_bytestr = _strencode(_tostr(key))
+        keyc = key_bytestr
+        val_bytestr = _strencode(_tostr(value))
+        valuec = val_bytestr
+        with nogil:
+            ierr = nc_rc_set(keyc,valuec)
+        _ensure_nc_success(ierr)
+    else:
+        raise RuntimeError(
+            "This function requires netcdf4 4.9.0+ to be used at compile time"
+        )
+
+
 
 # check for required version of netcdf-4 and hdf5.
 def _gethdf5libversion():