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allow user to more easily override preexisting options specified in last cfg line on memdisk line

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This commit is contained in:
Kenneth J. Davis 2012-11-10 13:50:11 -05:00
parent 1fd28ea850
commit 3a69192e7d
1 changed files with 41 additions and 0 deletions
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41
kernel/config.c
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@ -674,7 +674,9 @@ BYTE FAR * GetNextMemdiskLine(BYTE FAR *cLine, BYTE *pLine)
};
int ws = TRUE; /* treat start of line same as if whitespace seen */
BYTE FAR * mf = NULL; /* where last line split by memdisk option */
BYTE FAR *ptr = cLine; /* start of current cfg line, where { was */
BYTE FAR *sLine = cLine;
/* exit early if already at end of command line */
if (!*cLine) return cLine;
@ -706,6 +708,9 @@ BYTE FAR * GetNextMemdiskLine(BYTE FAR *cLine, BYTE *pLine)
/* ensure character after is end of line, =, or whitespace */
if (!c || (c == '=') || iswh(c))
{
/* flag this line split */
mf = ptr;
/* matched option so point past it */
ptr += memdiskopts[i].size;
@ -734,6 +739,42 @@ BYTE FAR * GetNextMemdiskLine(BYTE FAR *cLine, BYTE *pLine)
if (ptr < cLine)
{
ws = iswh(*ptr);
/* allow replacing X=Y prior to memdisk options with X=Z after */
/* on 1st pass if find a match we overwrite it with spaces */
if (mf && (*ptr == '='))
{
BYTE FAR *old=sLine, FAR *new;
printf("Found = after memdisk arg\n");
/* check for = in command line */
for (; old < mf; ++old)
{
for (; (*old != '=') && (old < mf); ++old)
;
/* ASSERT ptr points to = after memdisk option and old points to = before memdisk option or mf */
printf("old = %c and new = %c\n", *old, *ptr);
/* compare backwards to see if same option */
for (new = ptr; (old >= sLine) && ((*old & 0xCD) == (*new & 0xCD)); --old, --new)
{
printf("%c=%c -> ", *old, *new);
if (iswh(*old) || iswh(*new)) break;
}
if (((old <= sLine) || iswh(*old)) && iswh(*new))
{
printf("MATCH - clearing \n");
/* match found so overwrite with spaces */
for(++old; !iswh(*old) && (old < mf); ++old)
*old = ' ';
old = mf;
}
printf("skipping after =\n");
for (; (*old != '=') && (old < mf); ++old)
;
}
}
copy_char:
*pLine = *ptr;
++pLine;