TMS34010 C Compiler - Al Kossow's Bitsavers

TMS34010 C Language - Data Types
4.2 TMS34010 C Data Types
K&R 4.0 - Equivalent Types
• The char data type is signed. A separate type, unsigned char, is supported.
• long and int are functionally equivalent types. Either of these types can
be declared unsigned.
• double and long double are functionally equivalent types.
• The properties of enum types are identical to those of unsigned int.
K&R 4.0 - Additional Types
• An additional type, called void, can be used to declare a function that
returns no value. The compiler checks that functions declared as void
do not return values and that they are not used in expressions. Functions
are the only type of objects that can be declared void. .
• The compiler also supports a type that is a pointer to void (void *).
An object of type void * can be converted to and from a pointer to an
object of any other type without explicit conversions (casts). However,
such a pointer cannot be used indirectly to access the object that it
points to without a conversion. For example,
void *p, *malloc();
char *c;
int i;
p
p
p
c
i
K&R 4.0 - Derived Types
i
malloc();
c;
&i;
malloc();
*p;
*(int *)p;
/*
/*
/*
/*
/*
/*
Legal */
Legal, no cast needed
Legal, no cast needed
Legal, no cast needed
Illegal, dereferencing
void pointer
Legal, dereferencing
casted void pointer
*/
*/
*/
TMS34010 C allows any type declaration to have up to six derived types.
Constructions such as pointer to, array of, and function returning can be
combined and applied a maximum of six times.
For example:
int (* (*n[] []) () ) ();
translates as:
1 } an array of
2} arrays of
3) pointers to
·4) functions returning
5) pointers to
6) functions returning integers
It has six derived types, which is the maximum allowed.
*/
*/
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