that's too much!

.venv/lib/python3.12/site-packages/fiona/_cpl.pxd

@@ -0,0 +1,24 @@
+# Cross-platform API functions.
+
+cdef extern from "cpl_conv.h":
+    void *  CPLMalloc (size_t)
+    void    CPLFree (void *ptr)
+    void    CPLSetThreadLocalConfigOption (char *key, char *val)
+    const char *CPLGetConfigOption (char *, char *)
+
+cdef extern from "cpl_vsi.h":
+    ctypedef struct VSILFILE:
+        pass
+    int VSIFCloseL (VSILFILE *)
+    VSILFILE * VSIFileFromMemBuffer (const char * filename,
+                                     unsigned char * data,
+                                     int data_len,
+                                     int take_ownership)
+    int VSIUnlink (const char * pathname)
+
+ctypedef int OGRErr
+ctypedef struct OGREnvelope:
+    double MinX
+    double MaxX
+    double MinY
+    double MaxY