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authorGuido van Rossum <guido@python.org>1990-10-14 12:07:46 (GMT)
committerGuido van Rossum <guido@python.org>1990-10-14 12:07:46 (GMT)
commit85a5fbbdfea617f6cc8fae82c9e8c2b5c424436d (patch)
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parentc636014c430620325f8d213e9ba10d925991b8d7 (diff)
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Initial revision
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+/* Integer object interface */
+
+/*
+123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
+
+intobject represents a (long) integer. This is an immutable object;
+an integer cannot change its value after creation.
+
+There are functions to create new integer objects, to test an object
+for integer-ness, and to get the integer value. The latter functions
+returns -1 and sets errno to EBADF if the object is not an intobject.
+None of the functions should be applied to nil objects.
+
+The type intobject is (unfortunately) exposed bere so we can declare
+TrueObject and FalseObject below; don't use this.
+*/
+
+typedef struct {
+ OB_HEAD
+ long ob_ival;
+} intobject;
+
+extern typeobject Inttype;
+
+#define is_intobject(op) ((op)->ob_type == &Inttype)
+
+extern object *newintobject PROTO((long));
+extern long getintvalue PROTO((object *));
+
+
+/*
+123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
+
+False and True are special intobjects used by Boolean expressions.
+All values of type Boolean must point to either of these; but in
+contexts where integers are required they are integers (valued 0 and 1).
+Hope these macros don't conflict with other people's.
+
+Don't forget to apply INCREF() when returning True or False!!!
+*/
+
+extern intobject FalseObject, TrueObject; /* Don't use these directly */
+
+#define False ((object *) &FalseObject)
+#define True ((object *) &TrueObject)
+
+/* Macro, trading safety for speed */
+#define GETINTVALUE(op) ((op)->ob_ival)