On Wed, Jul 19, 2000 at 10:58:46AM -0700, John Marshall wrote:
> Adam Wozniak <[EMAIL PROTECTED]> wrote:
> >> MemSet() works exactly as documented.
> >
> > IMHO this is one of the most broken parts of the API.
>
> Agreed.
>
> > I'd really like to see this function renamed in some future release of
> > PalmOS. I think renaming it would prevent some confusion. MemFlood() ?
>
> I trust you don't really mean renaming the existing function. That would
> lead to silent (i.e., impossible to warn about at compile time) changes
> in people's programs. The only way to really rename it would be if
> you were willing to activate the new MemSet() behaviour by invoking the
> compiler with something like
>
> -DFIXED_UP_MEMSET_PLEASE_AND_I_PROMISE_NOT_TO_BLAME_PALM_IF_\
> THERE_ARE_ANY_OLD_STYLE_REVERSED_MEMSETS_LURKING_ANYWHERE_IN_\
> MY_CODE_THAT_JUST_SILENTLY_CHANGED_THEIR_MEANINGS
>
> The only sane thing to do is to add a new function with the standard
> memset() signature. You can do this yourself today:
Or if you use -O1 or greater with gcc and don't mind the debugger not
actually doing a call and return you can just inline everything.
(not everything has been tested...)
----------------------------------------------------------------
/* linux (posix?) says val should be an int */
//#include <string.h>
#define VALT int
#define SIZET size_t
extern inline void *memset(void *dst, VALT val, SIZET num)
{
register void *ds = dst;
while (num--)
*((char *) dst)++ = val;
return ds;
}
extern inline void *memcpy(void *dst, const void *src, SIZET num)
{
register void *ds = dst;
while (num--)
*((char *) dst)++ = *((char *) src)++;
return ds;
}
extern inline int memcmp(void *dst, const void *src, SIZET num)
{
while (num-- && (*((char *) dst)++ == *((char *) src)++));
if (num >= 0)
return *--((char *) dst) - *--((char *) src);
else
return 0;
}
extern inline void *memccpy(void *dst, const void *src, int c, SIZET num)
{
register void *ds = dst;
while (num-- && *((char *) src) != c)
*((char *) dst)++ = *((char *) src)++;
if (num >= 0)
*((char *) dst)++ = *((char *) src)++;
return ds;
}
extern inline void *memmove(void *dst, const void *src, SIZET num)
{
register void *ds = dst;
if (dst < src || dst >= src + num)
while (num--)
*((char *) dst)++ = *((char *) src)++;
else {
dst += num;
src += num;
while (num--)
*--((char *) dst) = *--((char *) src);
}
return ds;
}
extern inline SIZET strlen(char *dst)
{
register SIZET num = 0;
while ((*dst++))
num++;
return num;
}
extern inline char *strcat(char *dst, const char *src)
{
register char *ds = dst;
while (*dst)
dst++;
while ((*dst++ = *src++));
return ds;
}
extern inline char *strncat(char *dst, const char *src, SIZET num)
{
register char *ds = dst;
while (*dst)
dst++;
while (num-- && (*dst++ = *src++));
return ds;
}
extern inline char *strcpy(char *dst, const char *src)
{
register char *ds = dst;
while ((*dst++ = *src++));
return ds;
}
extern inline int strcmp(const char *dst, const char *src)
{
while (*dst && *src && (*dst++ == *src++));
if (*dst && *src)
return *--src - *--dst;
else
return *src - *dst;
}
extern inline int strncmp(const char *dst, const char *src, SIZET num)
{
while (num && *dst && *src && (*dst++ == *src++))
num--;
if( !num )
return 0;
if (*dst && *src)
return *--src - *--dst;
else
return *src - *dst;
}
extern inline char *strncpy(char *dst, const char *src, SIZET num)
{
register char *ds = dst;
while (num-- && (*dst++ = *src++));
if (num >= 0)
while (num--)
*dst++ = 0;
return ds;
}
extern inline void *memchr(const void *dst, VALT val, SIZET num)
{
char *dstl = (void *)dst;
while (num-- && *dstl++ != val);
if (num >= 0)
return (void *) --dstl;
else
return NULL;
}
extern inline char *strchr(const char *dst, int val)
{
char *dstl = (char *)dst;
while (*dstl && *dstl != val)
dstl++;
if (*dstl != val)
return NULL;
else
return dstl;
}
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