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Unify parse_name_ext for name and extension and inline this function into

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truename(). This is an optimization (200 bytes).


git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@1474 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2009-07-05 22:13:01 +00:00
parent 9e1e01e9e6
commit de81ab4e46
1 changed files with 48 additions and 69 deletions
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117
kernel/newstuff.c
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@ -253,61 +253,13 @@ STATIC const char _DirChars[] = "\"[]:|<>+=;,";
*p++ = c; \
}
/* helper for truename: parses either name or extension */
STATIC int parse_name_ext(int i, const char FAR **src, char **cp, char *dest)
{
int retval = SUCCESS;
char *p = *cp;
char c;
while(1) switch(c=*(*src)++)
{
case '.':
retval |= PNE_DOT;
/* fall through */
case '/':
case '\\':
case '\0':
*cp = p;
return retval;
case '*':
retval |= PNE_WILDCARD;
/* register the wildcard, even if no '?' is appended */
if (i) do
{
addChar('?');
} while(--i);
/** Alternative implementation:
if (i)
{
if (dest + SFTMAX - *p < i)
PATH_ERROR;
fmemset(p, '?', i);
p += i;
} **/
break;
case '?':
retval |= PNE_WILDCARD;
/* fall through */
default:
if (i) { /* name length in limits */
--i;
if (!DirChar(c)) PATH_ERROR;
addChar(c);
}
}
errRet:
return -1;
}
COUNT truename(const char FAR * src, char * dest, COUNT mode)
{
COUNT i;
struct dhdr FAR *dhp;
const char FAR *froot;
COUNT result;
int gotAnyWildcards = 0;
unsigned state;
struct cds FAR *cdsEntry;
char *p = dest; /* dynamic pointer into dest */
char *rootPos;
@ -466,7 +418,7 @@ COUNT truename(const char FAR * src, char * dest, COUNT mode)
cp[MAX_CDSPATH - 1] = '\0';
if ((TempCDS.cdsFlags & CDSNETWDRV) == 0)
{
if ((media_check(TempCDS.cdsDpb) < 0))
if (media_check(TempCDS.cdsDpb) < 0)
return DE_PATHNOTFND;
/* dos_cd ensures that the path exists; if not, we
@ -495,11 +447,12 @@ COUNT truename(const char FAR * src, char * dest, COUNT mode)
/* append the path specified in src */
addSep = *src ? ADD : DONT_ADD; /* add separator */
state = 0;
while(*src)
{
/* New segment. If any wildcards in previous
segment(s), this is an invalid path. */
if (gotAnyWildcards)
if (state & PNE_WILDCARD)
return DE_PATHNOTFND;
switch(*src++)
{
@ -554,29 +507,55 @@ COUNT truename(const char FAR * src, char * dest, COUNT mode)
/* append component in 8.3 convention */
--src;
/* first character skipped in switch() */
i = parse_name_ext(FNAME_SIZE, &src, &p, dest);
if (i == -1)
PATH_ERROR;
if (i & PNE_WILDCARD)
gotAnyWildcards = TRUE;
/* strip trailing dot */
if ((i & PNE_DOT) && *src != '/' && *src != '\\')
/* *** parse name and extension *** */
i = FNAME_SIZE;
state &= ~PNE_DOT;
while(*src != '/' && *src != '\\' && *src != '\0')
{
if (*src == '\0')
continue;
/* we arrive here only when an extension-dot has been found */
addChar('.');
i = parse_name_ext(FEXT_SIZE, &src, &p, dest);
if (i == -1 || i & PNE_DOT) /* multiple dots are ill-formed */
PATH_ERROR;
if (i & PNE_WILDCARD)
gotAnyWildcards = TRUE;
char c = *src++;
if (c == '*')
{
/* register the wildcard, even if no '?' is appended */
c = '?';
while (i)
{
--i;
addChar(c);
}
--src; /* terminator or separator was skipped */
/** Alternative implementation:
if (i)
{
if (dest + SFTMAX - *p < i)
PATH_ERROR;
fmemset(p, '?', i);
p += i;
} **/
}
if (c == '.')
{
if (state & PNE_DOT) /* multiple dots are ill-formed */
PATH_ERROR;
/* strip trailing dot */
if (*src == '/' || *src == '\\' || *src == '\0')
break;
/* we arrive here only when an extension-dot has been found */
state |= PNE_DOT;
i = FEXT_SIZE + 1;
}
else if (c == '?')
state |= PNE_WILDCARD;
if (i) { /* name length in limits */
--i;
if (!DirChar(c)) PATH_ERROR;
addChar(c);
}
}
/* *** end of parse name and extension *** */
break;
}
}
if (gotAnyWildcards && !(mode & CDS_MODE_ALLOW_WILDCARDS))
if (state & PNE_WILDCARD && !(mode & CDS_MODE_ALLOW_WILDCARDS))
return DE_PATHNOTFND;
if (addSep == ADD || p == dest + 2)
{