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VM doc cleanups

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Clarify that the "return value" macros all access the same location in
memory, and are just casting it (after a fashion) to the desired type.
This commit is contained in:
Jeff Teunissen 2011-07-15 13:12:26 -04:00
parent 9d2a3d2545
commit 49b5940cd5
1 changed files with 22 additions and 18 deletions
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40
include/QF/progs.h
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@ -674,10 +674,14 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
#define P_STRUCT(p,t,n) (*(t *)P_GPOINTER (p, n))
//@}
/** \defgroup prda_return Return value
/** \defgroup prda_return Return Values
\ingroup progs_data_access
Typed return value access marcos. No checking is done against the QC type,
but the appropriate C type will be used.
These macros are used to access the value returned by an interpreted VM
function, and to return values from engine functions into progs space
(that is, builtins).
\warning No checking is performed against progs types; for example, if you
ask for an \c int from a function that returned a \c float, you're asking
for trouble.
*/
//@{
@ -690,7 +694,7 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
*/
#define R_var(p,t) ((p)->pr_return->t##_var)
/** Access the float return value.
/** Access the VM function return value as a \c float
\par QC type:
\c float
@ -701,78 +705,78 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
*/
#define R_FLOAT(p) R_var (p, float)
/** Access the integer return value.
/** Access the VM function return value as a \c ::pr_int_t (AKA int32_t)
\par QC type:
\c integer
\param p pointer to ::progs_t VM struct
\return int lvalue
\return ::pr_int_t lvalue
\hideinitializer
*/
#define R_INT(p) R_var (p, integer)
/** Access the unsigned integer return value.
/** Access the VM function return value as a \c ::pr_uint_t (AKA uint32_t)
\par QC type:
\c uinteger
\param p pointer to ::progs_t VM struct
\return unsigned int lvalue
\return ::pr_int_t lvalue
\hideinitializer
*/
#define R_UINT(p) R_var (p, uinteger)
/** Access the vector return value.
/** Access the VM function return value as a \c ::vec3_t vector.
\par QC type:
\c vector
\param p pointer to ::progs_t VM struct
\return vec3_t lvalue
\return ::vec3_t lvalue
\hideinitializer
*/
#define R_VECTOR(p) R_var (p, vector)
/** Access the quaternion return value.
/** Access the VM function return value as a \c ::quat_t quaternion.
\par QC type:
\c quaternion
\param p pointer to ::progs_t VM struct
\return quat_t lvalue
\return ::quat_t lvalue
\hideinitializer
*/
#define R_QUAT(p) R_var (p, quat)
/** Access the string index return value.
/** Access the VM function return value as a ::string_t (a VM string reference).
\par QC type:
\c string
\param p pointer to ::progs_t VM struct
\return string_t lvalue
\return ::string_t lvalue
\hideinitializer
*/
#define R_STRING(p) R_var (p, string)
/** Access the function return value.
/** Access the VM function return value as a ::func_t (a VM function reference)
\par QC type:
\c void()
\param p pointer to ::progs_t VM struct
\return func_t lvalue
\return ::func_t lvalue
\hideinitializer
*/
#define R_FUNCTION(p) R_var (p, func)
/** Access the pointer return value.
/** Access the VM function return value as a ::pointer_t (a VM "pointer")
\par QC type:
\c void *
\param p pointer to ::progs_t VM struct
\return pointer_t lvalue
\return ::pointer_t lvalue
\hideinitializer
*/