If we are depending on Python 2.4, we don't need to make decimal module

support conditional.

psycopg/psycopgmodule.c

@@ -280,8 +280,11 @@ psyco_adapters_init(PyObject *mod)
     microprotocols_add(&PyUnicode_Type, NULL, (PyObject*)&qstringType);
     microprotocols_add(&PyBuffer_Type, NULL, (PyObject*)&binaryType);
     microprotocols_add(&PyList_Type, NULL, (PyObject*)&listType);
+    microprotocols_add((PyTypeObject*)psyco_GetDecimalType(),
+                       NULL, (PyObject*)&asisType);
 
-    /* as above, we use the callable objects from the psycopg module */
+    /* the module has already been initialized, so we can obtain the callable
+       objects directly from its dictionary :) */
     call = PyMapping_GetItemString(mod, "DateFromPy");
     microprotocols_add((PyTypeObject*)pyDateTypeP, NULL, call);
     call = PyMapping_GetItemString(mod, "TimeFromPy");
@@ -292,18 +295,12 @@ psyco_adapters_init(PyObject *mod)
     microprotocols_add((PyTypeObject*)pyDeltaTypeP, NULL, call);
 
 #ifdef HAVE_MXDATETIME
-    /* the module has already been initialized, so we can obtain the callable
+    /* as above, we use the callable objects from the psycopg module */
-       objects directly from its dictionary :) */
     call = PyMapping_GetItemString(mod, "TimestampFromMx");
     microprotocols_add(mxDateTimeP->DateTime_Type, NULL, call);
     call = PyMapping_GetItemString(mod, "TimeFromMx");
     microprotocols_add(mxDateTimeP->DateTimeDelta_Type, NULL, call);
 #endif
-
-#ifdef HAVE_DECIMAL
-    microprotocols_add((PyTypeObject*)psyco_GetDecimalType(),
-                       NULL, (PyObject*)&asisType);
-#endif
 }
 
 /* psyco_encodings_fill
@@ -583,9 +580,7 @@ psyco_GetDecimalType(void)
 {
     PyObject *decimalType = NULL;
     static PyObject *cachedType = NULL;
-
+    PyObject *decimal;
-#ifdef HAVE_DECIMAL
-    PyObject *decimal = PyImport_ImportModule("decimal");
 
     /* Use the cached object if running from the main interpreter. */
     int can_cache = psyco_is_main_interp();
@@ -595,6 +590,7 @@ psyco_GetDecimalType(void)
     }
 
     /* Get a new reference to the Decimal type. */
+    decimal = PyImport_ImportModule("decimal");
     if (decimal) {
         decimalType = PyObject_GetAttrString(decimal, "Decimal");
         Py_DECREF(decimal);
@@ -607,11 +603,10 @@ psyco_GetDecimalType(void)
 
     /* Store the object from future uses. */
     if (can_cache && !cachedType) {
+        Py_INCREF(decimalType);
         cachedType = decimalType;
     }
 
-#endif /* HAVE_DECIMAL */
-
     return decimalType;
 }
 

psycopg/typecast_basic.c

@@ -115,7 +115,6 @@ typecast_BOOLEAN_cast(const char *s, Py_ssize_t len, PyObject *curs)
 
 /** DECIMAL - cast any kind of number into a Python Decimal object **/
 
-#ifdef HAVE_DECIMAL
 static PyObject *
 typecast_DECIMAL_cast(const char *s, Py_ssize_t len, PyObject *curs)
 {
@@ -135,9 +134,6 @@ typecast_DECIMAL_cast(const char *s, Py_ssize_t len, PyObject *curs)
 
     return res;
 }
-#else
-#define typecast_DECIMAL_cast  typecast_FLOAT_cast
-#endif
 
 /* some needed aliases */
 #define typecast_NUMBER_cast   typecast_FLOAT_cast

setup.cfg

@@ -12,12 +12,6 @@ define=PSYCOPG_EXTENSIONS,PSYCOPG_NEW_BOOLEAN,HAVE_PQFREEMEM,HAVE_PQPROTOCOL3,PS
 # Set to 1 to use Python datatime objects for default date/time representation
 use_pydatetime=1
 
-# Set to 1 if you want to enable "Decimal" type on python 2.3. 
-# If the "decimal" module is found in the PYTHONPATH it will be used, else
-# fall back on the float type (this is disabled by default to be compatible
-# with old versions of psycopg 1 and pre-beta versions of psycopg 2.)
-use_decimal=0
-
 # If the build system does not find the mx.DateTime headers, try 
 # uncommenting the following line and setting its value to the right path.
 #mx_include_dir=

setup.py

@@ -55,7 +55,7 @@ from distutils.sysconfig import get_python_inc
 from distutils.ccompiler import get_default_compiler
 
 PSYCOPG_VERSION = '2.0.8'
-version_flags   = ['dt']
+version_flags   = ['dt', 'dec']
 
 PLATFORM_IS_WINDOWS = sys.platform.lower().startswith('win')
 
@@ -86,14 +86,12 @@ class psycopg_build_ext(build_ext):
          "Use Python datatime objects for date and time representation."),
         ('pg-config=', None,
           "The name of the pg_config binary and/or full path to find it"),
-        ('use-decimal', None,
-         "Use Decimal type even on Python 2.3 if the module is provided."),
         ('have-ssl', None,
          "Compile with OpenSSL built PostgreSQL libraries (Windows only)."),
     ])
 
     boolean_options = build_ext.boolean_options[:]
-    boolean_options.extend(('use-pydatetime', 'use-decimal', 'have-ssl'))
+    boolean_options.extend(('use-pydatetime', 'have-ssl'))
 
     DEFAULT_PG_CONFIG = "pg_config"
 
@@ -323,13 +321,6 @@ sources = [
 parser = ConfigParser.ConfigParser()
 parser.read('setup.cfg')
 
-# Choose if to use Decimal type
-use_decimal = int(parser.get('build_ext', 'use_decimal'))
-if sys.version_info[0] >= 2 and (
-    sys.version_info[1] >= 4 or (sys.version_info[1] == 3 and use_decimal)):
-    define_macros.append(('HAVE_DECIMAL','1'))
-    version_flags.append('dec')
-
 # Choose a datetime module
 have_pydatetime = True
 have_mxdatetime = False