Buffers: Support for typedefs floats.

Cython/Compiler/Buffer.py

@@ -474,6 +474,10 @@ def get_ts_check_item(dtype, writer):
                     ('b', 'char'), ('h', 'short'), ('i', 'int'),
                     ('l', 'long'), ('q', 'long long')
                 ]
+            elif dtype.is_float:
+                types = [('f', 'float'), ('d', 'double'), ('g', 'long double')]
+            else:
+                assert False
             if dtype.signed == 0:
                 code += "".join(["\n    case '%s': ok = (sizeof(%s) == sizeof(%s) && (%s)-1 > 0); break;" %
                                  (char.upper(), ctype, against, ctype) for char, against in types])
@@ -488,6 +492,8 @@ def get_ts_check_item(dtype, writer):
                     return NULL;
                 } else return ts + 1;
                 """, 2)
+            
+
         writer.globalstate.use_utility_code([dedent("""\
             static const char* %s(const char* ts); /*proto*/
         """) % name, dedent("""

tests/run/bufaccess.h

 /* See bufaccess.pyx */
 
-typedef short htypedef_short;
+typedef short td_h_short;
+typedef double td_h_double;
+typedef unsigned short td_h_ushort;

tests/run/bufaccess.pyx

@@ -657,19 +657,22 @@ def printbuf_float(o, shape):
 #
 # Typedefs
 #
-ctypedef int cytypedef_int
+# Test three layers of typedefs going through a h file for plain int, and
+# simply a header file typedef for floats and unsigned.
+
+ctypedef int td_cy_int
 cdef extern from "bufaccess.h":
-    ctypedef cytypedef_int htypedef_short # Defined as short, but Cython doesn't know this!
-ctypedef htypedef_short cytypedef2
+    ctypedef td_cy_int td_h_short # Defined as short, but Cython doesn't know this!
+    ctypedef float td_h_double # Defined as double
+    ctypedef unsigned int td_h_ushort # Defined as unsigned short
+ctypedef td_h_short td_h_cy_short
 
 @testcase
-def printbuf_cytypedef_int(object[cytypedef_int] buf, shape):
+def printbuf_td_cy_int(object[td_cy_int] buf, shape):
     """
-    >>> printbuf_cytypedef_int(IntMockBuffer("A", range(3)), (3,))
-    acquired A
+    >>> printbuf_td_cy_int(IntMockBuffer(None, range(3)), (3,))
     0 1 2 END
-    released A
-    >>> printbuf_cytypedef_int(ShortMockBuffer("B", range(3)), (3,))
+    >>> printbuf_td_cy_int(ShortMockBuffer(None, range(3)), (3,))
     Traceback (most recent call last):
        ...
     ValueError: Buffer datatype mismatch (rejecting on 'h')
@@ -681,41 +684,66 @@ def printbuf_cytypedef_int(object[cytypedef_int] buf, shape):
     print 'END'
 
 @testcase
-def printbuf_htypedef_short(object[htypedef_short] buf, shape):
+def printbuf_td_h_short(object[td_h_short] buf, shape):
     """
-    >>> printbuf_htypedef_short(ShortMockBuffer("A", range(3)), (3,))
-    acquired A
+    >>> printbuf_td_h_short(ShortMockBuffer(None, range(3)), (3,))
     0 1 2 END
-    released A
-    >>> printbuf_htypedef_short(IntMockBuffer("B", range(3)), (3,))
+    >>> printbuf_td_h_short(IntMockBuffer(None, range(3)), (3,))
     Traceback (most recent call last):
        ...
     ValueError: Buffer datatype mismatch (rejecting on 'i')
     """    
-    
     cdef int i
     for i in range(shape[0]):
         print buf[i],
     print 'END'
 
 @testcase
-def printbuf_cytypedef2(object[cytypedef2] buf, shape):
+def printbuf_td_h_cy_short(object[td_h_cy_short] buf, shape):
     """
-    >>> printbuf_cytypedef2(ShortMockBuffer("A", range(3)), (3,))
-    acquired A
+    >>> printbuf_td_h_cy_short(ShortMockBuffer(None, range(3)), (3,))
     0 1 2 END
-    released A
-    >>> printbuf_cytypedef2(IntMockBuffer("B", range(3)), (3,))
+    >>> printbuf_td_h_cy_short(IntMockBuffer(None, range(3)), (3,))
     Traceback (most recent call last):
        ...
     ValueError: Buffer datatype mismatch (rejecting on 'i')
     """
+    cdef int i
+    for i in range(shape[0]):
+        print buf[i],
+    print 'END'
+
+@testcase
+def printbuf_td_h_ushort(object[td_h_ushort] buf, shape):
+    """
+    >>> printbuf_td_h_ushort(UnsignedShortMockBuffer(None, range(3)), (3,))
+    0 1 2 END
+    >>> printbuf_td_h_ushort(ShortMockBuffer(None, range(3)), (3,))
+    Traceback (most recent call last):
+       ...
+    ValueError: Buffer datatype mismatch (rejecting on 'h')
+    """
+    cdef int i
+    for i in range(shape[0]):
+        print buf[i],
+    print 'END'
 
+@testcase
+def printbuf_td_h_double(object[td_h_double] buf, shape):
+    """
+    >>> printbuf_td_h_double(DoubleMockBuffer(None, [0.25, 1, 3.125]), (3,))
+    0.25 1.0 3.125 END
+    >>> printbuf_td_h_double(FloatMockBuffer(None, [0.25, 1, 3.125]), (3,))
+    Traceback (most recent call last):
+       ...
+    ValueError: Buffer datatype mismatch (rejecting on 'f')
+    """
     cdef int i
     for i in range(shape[0]):
         print buf[i],
     print 'END'
 
+
 #
 # Object access
 #
@@ -932,13 +960,6 @@ cdef class MockBuffer:
     cdef get_default_format(self):
         print "ERROR, not subclassed", self.__class__
     
-cdef class FloatMockBuffer(MockBuffer):
-    cdef int write(self, char* buf, object value) except -1:
-        (<float*>buf)[0] = <float>value
-        return 0
-    cdef get_itemsize(self): return sizeof(float)
-    cdef get_default_format(self): return b"=f"
-
 cdef class IntMockBuffer(MockBuffer):
     cdef int write(self, char* buf, object value) except -1:
         (<int*>buf)[0] = <int>value
@@ -960,6 +981,21 @@ cdef class UnsignedShortMockBuffer(MockBuffer):
     cdef get_itemsize(self): return sizeof(unsigned short)
     cdef get_default_format(self): return b"=1H" # Try with repeat count
 
+cdef class FloatMockBuffer(MockBuffer):
+    cdef int write(self, char* buf, object value) except -1:
+        (<float*>buf)[0] = <float>value
+        return 0
+    cdef get_itemsize(self): return sizeof(float)
+    cdef get_default_format(self): return b"f"
+
+cdef class DoubleMockBuffer(MockBuffer):
+    cdef int write(self, char* buf, object value) except -1:
+        (<double*>buf)[0] = <double>value
+        return 0
+    cdef get_itemsize(self): return sizeof(double)
+    cdef get_default_format(self): return b"d"
+
+
 cdef extern from *:
     void* addr_of_pyobject "(void*)"(object)