Fix reader write

Author: DominikKamp

src/pyscipopt/reader.pxi

@@ -12,7 +12,7 @@ cdef class Reader:
         '''calls read method of reader'''
         return {}
 
-    def readerwrite(self, file, name, transformed, objsense, objscale, objoffset, binvars, intvars,
+    def readerwrite(self, file, name, transformed, objsense, objoffset, objscale, binvars, intvars,
                     implvars, contvars, fixedvars, startnvars, conss, maxnconss, startnconss, genericnames):
         '''calls write method of reader'''
         return {}
@@ -40,7 +40,8 @@ cdef SCIP_RETCODE PyReaderRead (SCIP* scip, SCIP_READER* reader, const char* fil
 
 cdef SCIP_RETCODE PyReaderWrite (SCIP* scip, SCIP_READER* reader, FILE* file,
                                  const char* name, SCIP_PROBDATA* probdata, SCIP_Bool transformed,
-                                 SCIP_OBJSENSE objsense, SCIP_Real objscale, SCIP_Real objoffset, 
+                                 SCIP_OBJSENSE objsense, SCIP_Real objoffset, SCIP_Real objscale,
+                                 SCIP_RATIONAL* objoffsetexact, SCIP_RATIONAL* objscaleexact,
                                  SCIP_VAR** vars, int nvars, int nbinvars, int nintvars, int nimplvars, int ncontvars,
                                  SCIP_VAR** fixedvars, int nfixedvars, int startnvars,
                                  SCIP_CONS** conss, int nconss, int maxnconss, int startnconss,
@@ -58,7 +59,8 @@ cdef SCIP_RETCODE PyReaderWrite (SCIP* scip, SCIP_READER* reader, FILE* file,
     PyFixedVars = [Variable.create(fixedvars[i]) for i in range(nfixedvars)]
     PyConss = [Constraint.create(conss[i]) for i in range(nconss)]
     PyReader = <Reader>readerdata
-    result_dict = PyReader.readerwrite(PyFile, PyName, transformed, objsense, objscale, objoffset,
+    #TODO: provide rational objoffsetexact and objscaleexact
+    result_dict = PyReader.readerwrite(PyFile, PyName, transformed, objsense, objoffset, objscale,
                                        PyBinVars, PyIntVars, PyImplVars, PyContVars, PyFixedVars, startnvars,
                                        PyConss, maxnconss, startnconss, genericnames)
     result[0] = result_dict.get("result", <SCIP_RESULT>result[0])

src/pyscipopt/scip.pxd

@@ -361,6 +361,9 @@ cdef extern from "scip/scip.h":
 
     ctypedef double SCIP_Real
 
+    ctypedef struct SCIP_RATIONAL:
+        pass
+
     ctypedef struct SCIP:
         pass
 
@@ -957,7 +960,8 @@ cdef extern from "scip/scip.h":
                                    SCIP_RETCODE (*readerread) (SCIP* scip, SCIP_READER* reader, const char* filename, SCIP_RESULT* result),
                                    SCIP_RETCODE (*readerwrite) (SCIP* scip, SCIP_READER* reader, FILE* file,
                                                                 const char* name, SCIP_PROBDATA* probdata, SCIP_Bool transformed,
-                                                                SCIP_OBJSENSE objsense, SCIP_Real objscale, SCIP_Real objoffset,
+                                                                SCIP_OBJSENSE objsense, SCIP_Real objoffset, SCIP_Real objscale,
+                                                                SCIP_RATIONAL* objoffsetexact, SCIP_RATIONAL* objscaleexact,
                                                                 SCIP_VAR** vars, int nvars, int nbinvars, int nintvars, int nimplvars, int ncontvars,
                                                                 SCIP_VAR** fixedvars, int nfixedvars, int startnvars,
                                                                 SCIP_CONS** conss, int nconss, int maxnconss, int startnconss,