Texas Instruments TMS320C2x, User Manual

Page: 55 / 250

Using Inline Function Expansion
2-33 C Compiler Description
Example 2 − 1. How the Run-Time-Support Library Uses the _INLINE Preprocessor
Symbol
(a) string.h
/****************************************************************************/
/* STRING.H HEADER FILE */
/****************************************************************************/
typdef unsigned size_t
#if _INLINE
#define _ _INLINE static inline
/* Declaration when inlining */
#else
#define _ _INLINE
/*No declaration when not inlining */
#endif
_ _INLINE void *memcpy (void *_s1, const void *_s2, size_t _n);
#if _INLINE /* Declare the inlined function */
static inline void *memcpy (void *to, const void *from, size_t n)
{
register char *rto = (char *) to;
register char *rfrom = (char *) from;
register size_t rn;
for (rn = 0; rn < n; rn++) *rto++ =rfrom++;
return (to);
}
#endif /* _INLINE */
#undef _ _INLINE
(b) strlen.c
/****************************************************************************/
/* MEMCPY.C (rts2
xx .lib) */
/****************************************************************************/
#undef _INLINE /* Turn off so code will be generated */
#include <string.h>
void *memcpy (void *to, const void *from, size_t n)
{
register char *rto = (char *) to;
register char *rfrom = (char *) from;
register size_t rn;
for (rn = 0; rn < n; rn++) *rto++ =rfrom++;
return (to);
}