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FICL's TYPE copies the counted string to HERE, as abial has
remarked. Answering to abial's question, this is NOT garanteed to have
enough space.
...
	We have dynamic memory. Even before memory-alloc got in, we
already had dynamic memory. Use it, then! (ficlMalloc is sysdep, so I
suppose that's why it was not used for TYPE; ficl is probably designed
to work without a working ficlFree).

Submitted by:	"Daniel C. Sobral" <dcs@newsguy.com>
This commit is contained in:
Mike Smith 1999-01-24 05:58:18 +00:00
parent 161a8f6519
commit f7f7a5d7ab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43135
1 changed files with 7 additions and 11 deletions
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18
sys/boot/ficl/words.c
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@ -2755,26 +2755,22 @@ static void type(FICL_VM *pVM)
{
UNS32 count = stackPopUNS32(pVM->pStack);
char *cp = stackPopPtr(pVM->pStack);
char *pDest = (char *)ficlMalloc(count);
/*
** Since we don't have an output primitive for a counted string
** (oops), make sure the string is null terminated. If not, copy
** and terminate it.
*/
/* XXX Uses free space on top of dictionary. Is it guaranteed
* XXX to always fit? (abial)
*/
if (cp[count] != '\0')
{
char *pDest = (char *)ficlGetDict()->here;
if (cp != pDest)
strncpy(pDest, cp, count);
if (!pDest)
vmThrowErr(pVM, "Error: out of memory");
pDest[count] = '\0';
cp = pDest;
}
strncpy(pDest, cp, count);
pDest[count] = '\0';
vmTextOut(pVM, cp, 0);
ficlFree(pDest);
return;
}