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[gamecode] Add a macros for arbitrary param/return types

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Of course, the type has to be small enough to fit or bad things may
happen, but it beats having to type the crazy casting every time.
This commit is contained in:
Bill Currie 2020-03-06 00:23:44 +09:00
parent 94e35b5f57
commit 3b959c3ed0
1 changed files with 29 additions and 3 deletions
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32
include/QF/progs.h
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@ -562,6 +562,20 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
*/
#define P_var(p,n,t) ((p)->pr_params[n]->t##_var)
/** Access a parameter as an arbitray type.
\par QC type:
\c struct etc small enough to fit in a single parameter
\param p pointer to ::progs_t VM struct
\param t C type of the structure
\param n parameter number (0-7)
\return structure lvalue. use & to make a pointer of the
appropriate type.
\hideinitializer
*/
#define P_PACKED(p,t,n) (*(t *) (p)->pr_params[n])
/** Access a float parameter. Can be assigned to.
\par QC type:
@ -584,7 +598,7 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
\hideinitializer
*/
#define P_DOUBLE(p,n) (*(double *) ((p)->pr_params[n]))
#define P_DOUBLE(p,n) P_PACKED(p, double, n)
/** Access an integer parameter. Can be assigned to.
@ -670,7 +684,6 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
*/
#define P_POINTER(p,n) P_var (p, n, pointer)
/** Access an entity parameter.
\par QC type:
@ -767,6 +780,19 @@ 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 VM function return value parameter as an arbitray type.
\par QC type:
\c struct etc small enough to fit in the return slot
\param p pointer to ::progs_t VM struct
\param t C type of the structure
\return structure lvalue. use & to make a pointer of the
appropriate type.
\hideinitializer
*/
#define R_PACKED(p,t) (*(t *) (p)->pr_return)
/** Access the VM function return value as a \c float
\par QC type:
@ -787,7 +813,7 @@ void PR_Undefined (progs_t *pr, const char *type, const char *name) __attribute_
\hideinitializer
*/
#define R_DOUBLE(p) (*(double *) ((p)->pr_return))
#define R_DOUBLE(p) R_PACKED (p, double)
/** Access the VM function return value as a \c ::pr_int_t (AKA int32_t)