char *dfnfullpath(const char * const fnam)
{ char *fullpath;
char *paths;
char *q; /* intermediate pointers */
char *nxtDelim;
int cnt;
#ifdef OS_WIN32
#ifdef SUPPORT_UNC_PATH
DBG_ENTER("dfnufullpath2", Suppl_dfn)
#else
DBG_ENTER("dfnfullpath2", Suppl_dfn)
#endif
#else
#ifdef SUPPORT_UNC_PATH
DBG_ENTER("dfnufullpath", Suppl_dfn)
#else
DBG_ENTER("dfnfullpath", Suppl_dfn)
#endif
#endif
assert(fnam);
DBG_ARGUMENTS( ("fnam=\"%s\"", fnam) )
chkHeap
if((fullpath = dfnexpand(fnam, 0)) == 0)
DBG_RETURN_S( 0)
assert(*fullpath);
#ifdef SUPPORT_UNC_PATH
if(isUNCpath(fullpath)) paths = UNCpath(fullpath);
else
#endif
{
assert(*fullpath && fullpath[1] == ':');
paths = &fullpath[2];
}
chkHeap
assert(*paths == '\\');
q = paths;
while(*q == '\\' && *++q) {
/* Check for special directories */
if((nxtDelim = strchr(q, '\\')) == 0)
nxtDelim = strchr(q, '\0');
if((cnt = strspn(q, ".")) == nxtDelim - q
#ifndef FEATURE_LONG_FILENAMES
&& cnt < 3 /* DOS limits to "." and ".." */
#endif
) {
/* all dots --> special directory */
/* Relocate "q" (cnt-1) path components to the left */
while(--q > paths && --cnt) {
/* search next '\' to the left */
while(*--q != '\\');
++q;
}
if(*nxtDelim) {
/* some components left, move them up */
/* Note: *nxtDelim == *q == '\\', but by copying over
this single character one needs not implement a
special handling if nxtDelim[1] == '\0' */
memmove(q, nxtDelim, strlen(nxtDelim) + 1);
} else {
/* this was the last component, but because this was
a special directory, the information must be preserved
that it is a directory --> append trailing backslash */
q[1] = '\0';
}
} else {
q = nxtDelim;
}
}
chkHeap
DBG_RETURN_S( StrTrim(fullpath))
}
char *dfnexpand(const char * const fnam, char * const path)
{ char *h, *p; /* intermediate pointers */
char *dr, *pa, *na, *ex; /* filename components */
char pathDr, *pathPa; /* drive & path of 'path' */
char *dynPath;
#ifdef SUPPORT_UNC_PATH
DBG_ENTER("dfnuexpand", Suppl_dfn)
#else
DBG_ENTER("dfnexpand", Suppl_dfn)
#endif
assert(fnam);
DBG_ARGUMENTS( ("fnam=\"%s\", path=\"%s\"", fnam, path) )
chkHeap
if((h = dfnsqueeze(fnam)) == 0)
DBG_RETURN_S( 0)
#ifdef SUPPORT_UNC_PATH
if(isUNCpath(h)) { /* UNC paths are always fully-qualified */
/* check if the trailing '\\' is present to mark the root direc */
DBG_RETURN_BS((*UNCpath(h) != '\\')? StrAppChr(h, '\\') : h)
}
#endif
chkHeap
if(!*h || h[1] != ':' || h[2] != '\\') {
/* the spec is not fully-qualified or completely empty */
pathDr = 0;
dynPath = 0;
if((pathPa = path) != 0 && *pathPa) {
if(pathPa[1] == ':') { /* path[] has drive spec */
pathDr = *path;
if(!*(pathPa += 2)) {
pathPa = 0;
goto noPath;
}
}
if(dfndelim(*pathPa) && !pathPa[1])
++pathPa; /* Trans "/" || "\\" --> "" */
noPath:;
}
chkHeap
if(dfnsplit(h, &dr, &pa, &na, &ex)) {
StrFree(h);
if(dr) { /* drive specified */
if(pathDr && toFUpper(pathDr) != *dr)
/* The specified path is for a different drive */
pathPa = 0;
}
else { /* drive spec missing */
if((dr = StrChar(pathDr? pathDr: 'A' + getdisk())) == 0)
goto errRet;
}
if(!pa || *pa != '\\' && *pa != NUL) {
/* no path or a relative one */
if(!pathPa) { /* path has no path spec in it */
if((dynPath = dfnpath(*dr)) == 0)
goto errRet;
pathPa = dynPath + 2;
}
if((p = dfnmerge(0, 0, pathPa, pa, 0)) == 0)
goto errRet;
StrRepl(pa, p);
}
h = dfnmerge(0, dr, pa, na, ex);
} else
StrFree(h);
errRet:
chkHeap
free(dr);
free(pa);
free(na);
free(ex);
free(dynPath);
}