GetFullPathName patch

[Duane Clark <dclark@akamail.com>]

Here are some additional modifications for handling various Unix style 
path names, this time in GetFullPathName. Again, these are a result of 
testing with Xilinx software. Xilinx ISE appears to generate just about 
every possible combination of DOS and Unix formats :-)

This patch includes the previous patch to GetPathDrive.

This patch modifies the handling of paths which begin with either a 
forward or backslash. In this case, Windows simply prepends the current 
drive letter. However, this patch handles that slightly differently to 
check whether the path corresponds to a mapped drive. If so, the output 
path will have the mapped drive designation. At least, that is what the 
Xilinx software is expecting. Otherwise if not a mapped drive, we match 
the Windows method.

Changelog: In DoGetFullPathName, check absolute paths for mapped drive.

Index: files/dos_fs.c
===================================================================
RCS file: /home/wine/wine/files/dos_fs.c,v
retrieving revision 1.112
diff -u -r1.112 dos_fs.c
--- files/dos_fs.c	21 Jun 2002 19:00:13 -0000	1.112
+++ files/dos_fs.c	1 Jul 2002 16:40:33 -0000
@@ -835,7 +835,7 @@
         drive = FILE_toupper(*p) - 'A';
         *name += 2;
     }
-    else if (*p == '/') /* Absolute Unix path? */
+    else if (*p == '/' || *p == '\\') /* Absolute Unix path? */
     {
         if ((drive = DRIVE_FindDriveRoot( name )) == -1)
         {
@@ -1239,7 +1239,7 @@
     DWORD ret;
     DOS_FULL_NAME full_name;
     char *p,*q;
-    const char * root;
+    const char * root, * ppath;
     char drivecur[]="c:.";
     char driveletter=0;
     int namelen,drive=0;
@@ -1259,12 +1259,34 @@
 	lstrcpynA(full_name.short_name,name,MAX_PATHNAME_LEN);
 	drive = (int)FILE_toupper(name[0]) - 'A';
       }
+    else if ((name[0]=='\\') || (name[0]=='/'))
+      {
+        ppath = name;
+        if ((drive = DRIVE_FindDriveRoot( &ppath )) == -1)
+          {
+            /* If the absolute path does not correspond to a configured
+              DOS drive, then just prepend the drive letter of the current
+              drive. This is the normal Windows behavior. */
+            drive = DRIVE_GetCurrentDrive();
+            root= DRIVE_GetRoot(drive);
+            full_name.short_name[0] = root[1] - ('a' - 'A');
+            full_name.short_name[1] = ':';
+            lstrcpynA(full_name.short_name+2,name,MAX_PATHNAME_LEN-3);
+          }
+        else
+          {
+            /* Deviate from normal Windows behavior if the absolute path
+              corresponds to a configured DOS drive. */
+            root= DRIVE_GetRoot(drive);
+            full_name.short_name[0] = root[1] - ('a' - 'A');
+            full_name.short_name[1] = ':';
+	    lstrcpynA(full_name.short_name+2,ppath,MAX_PATHNAME_LEN-3);
+	  }
+      }
     else
       {
 	if (driveletter)
 	  drivecur[0]=driveletter;
-        else if ((name[0]=='\\') || (name[0]=='/'))
-          strcpy(drivecur,"\\");
         else
 	  strcpy(drivecur,".");
 
@@ -1306,6 +1328,7 @@
 	full_name.short_name[namelen] = 0;
 	lstrcpynA(full_name.short_name +namelen,p,MAX_PATHNAME_LEN-namelen);
       }
+    TRACE("drive %d  shortname %s\n", drive, full_name.short_name);
     /* reverse all slashes */
     for (p=full_name.short_name;
 	 p < full_name.short_name+strlen(full_name.short_name);