Split 8.3 FCB-style filename extraction from ParseDosName into a new

ConvertNameSZToName83 function, also used by dir_open().


git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@1433 6ac86273-5f31-0410-b378-82cca8765d1b

kernel/dosnames.c

@@ -75,13 +75,13 @@ VOID XlateLcase(BYTE * szFname, COUNT nChars)
     returns number of characters in the directory component (up to the
     last backslash, including d:) or negative if error
  */
-int ParseDosName(const char *filename, char *fcbname, BOOL bAllowWildcards)
+int ParseDosName(const char *filename, BOOL bAllowWildcards)
 {
-  int nDirCnt, nFileCnt, nExtCnt;
-  const char *lpszLclDir, *lpszLclFile, *lpszLclExt;
+  int nDirCnt;
+  const char *lpszLclDir, *lpszLclFile;
 
   /* Initialize the users data fields                             */
-  nDirCnt = nFileCnt = nExtCnt = 0;
+  nDirCnt = 0;
 
   /* NB: this code assumes ASCII                          */
 
@@ -101,12 +101,9 @@ int ParseDosName(const char *filename, char *fcbname, BOOL bAllowWildcards)
   filename = lpszLclFile;
   while (bAllowWildcards ? WildChar(*filename) :
          NameChar(*filename))
-  {
-    ++nFileCnt;
     ++filename;
-  }
 
-  if (nFileCnt == 0)
+  if (filename == lpszLclFile)
   {
     int err = DE_PATHNOTFND;
     if (bAllowWildcards && *filename == '\0' &&
@@ -118,35 +115,21 @@ int ParseDosName(const char *filename, char *fcbname, BOOL bAllowWildcards)
 
   /* Now we have pointers set to the directory portion and the    */
   /* file portion.  Now determine the existance of an extension.  */
-  lpszLclExt = filename;
   if ('.' == *filename)
   {
-    lpszLclExt = ++filename;
+    ++filename;
     while (*filename)
     {
       if (bAllowWildcards ? WildChar(*filename) :
           NameChar(*filename))
-      {
-        ++nExtCnt;
         ++filename;
-      }
       else
-      {
         return DE_FILENOTFND;
-      }
     }
   }
   else if (*filename)
     return DE_FILENOTFND;
 
-  /* Finally copy whatever the user wants extracted to the user's */
-  /* buffers.                                                     */
-  memset(fcbname, ' ', FNAME_SIZE + FEXT_SIZE);
-  memcpy(fcbname, lpszLclFile, nFileCnt);
-  memcpy(&fcbname[FNAME_SIZE], lpszLclExt, nExtCnt);
-
-  /* Clean up before leaving                              */
-
   return nDirCnt;
 }
 

kernel/fatdir.c

@@ -98,18 +98,7 @@ f_node_ptr dir_open(register const char *dirname, f_node_ptr fnp)
     /* Convert the name into an absolute name for           */
     /* comparison...                                        */
 
-    memset(fcbname, ' ', FNAME_SIZE + FEXT_SIZE);
-
-    for (i = 0; i < FNAME_SIZE + FEXT_SIZE; i++, dirname++)
-    {
-      char c = *dirname;
-      if (c == '.')
-        i = FNAME_SIZE - 1;
-      else if (c != '\0' && c != '\\')
-        fcbname[i] = c;
-      else
-        break;
-    }
+    dirname = ConvertNameSZToName83(fcbname, dirname);
 
     /* Now search through the directory to  */
     /* find the entry...                    */
@@ -309,7 +298,7 @@ COUNT dos_findfirst(UCOUNT attr, BYTE * name)
   /* current directory, do a seek and read.                       */
 
   /* Parse out the file name */
-  i = ParseDosName(name, SearchDir.dir_name, TRUE);
+  i = ParseDosName(name, TRUE);
   if (i < SUCCESS)
     return i;
 /*
@@ -344,13 +333,10 @@ COUNT dos_findfirst(UCOUNT attr, BYTE * name)
   }
 
   /* Now initialize the dirmatch structure.            */
-
+  ConvertNameSZToName83(dmp->dm_name_pat, &name[i]);
   dmp->dm_drive = name[0] - 'A';
   dmp->dm_attr_srch = attr;
 
-  /* Copy the raw pattern from our data segment to the DTA. */
-  fmemcpy(dmp->dm_name_pat, SearchDir.dir_name, FNAME_SIZE + FEXT_SIZE);
-
   if ((attr & (D_VOLID|D_DIR))==D_VOLID)
   {
     /* Now do the search                                    */
@@ -393,7 +379,7 @@ COUNT dos_findnext(void)
   /* Select the default to help non-drive specified path          */
   /* searches...                                                  */
   fnp = &fnode[0];
-  dmp = fnp->f_dmp;
+  dmp = &sda_tmp_dm;
   fnp->f_dpb = get_dpb(dmp->dm_drive);
   if (media_check(fnp->f_dpb) < 0)
     return DE_NFILES;
@@ -503,3 +489,23 @@ int FileName83Length(BYTE * filename83)
 }
 #endif
 
+/* this routine converts a name portion of a fully qualified path       */
+/* name, so . and .. are not allowed, only straightforward 8+3 names    */
+const char *ConvertNameSZToName83(char *fcbname, const char *dirname)
+{
+  int i;
+  memset(fcbname, ' ', FNAME_SIZE + FEXT_SIZE);
+
+  for (i = 0; i < FNAME_SIZE + FEXT_SIZE; i++, dirname++)
+  {
+    char c = *dirname;
+    if (c == '.')
+      i = FNAME_SIZE - 1;
+    else if (c != '\0' && c != '\\')
+      fcbname[i] = c;
+    else
+      break;
+  }
+  return dirname;
+}
+

kernel/fatfs.c

@@ -260,7 +260,7 @@ COUNT dos_close(COUNT fd)
 f_node_ptr split_path(char * path, char * fcbname, f_node_ptr fnp)
 {
   /* Start off by parsing out the components.                     */ 
-  int dirlength = ParseDosName(path, fcbname, FALSE);
+  int dirlength = ParseDosName(path, FALSE);
 
   if (dirlength < SUCCESS)
     return (f_node_ptr) 0;
@@ -292,6 +292,10 @@ f_node_ptr split_path(char * path, char * fcbname, f_node_ptr fnp)
     fnp = dir_open(path, fnp);
     path[dirlength] = tmp;
   } 
+
+  /* Extract the 8.3 filename from the path */
+  ConvertNameSZToName83(fcbname, &path[dirlength]);
+
   return fnp;
 }
 

kernel/proto.h

@@ -130,7 +130,7 @@ VOID ASMCFUNC DosIdle_hlt(void);
 #endif
 
 /* dosnames.c */
-int ParseDosName(const char *, char *, BOOL);
+int ParseDosName(const char *, BOOL);
 
 /* error.c */
 VOID dump(void);
@@ -146,7 +146,7 @@ BOOL dir_write_update(REG f_node_ptr fnp, BOOL update);
 COUNT dos_findfirst(UCOUNT attr, BYTE * name);
 COUNT dos_findnext(void);
 void ConvertName83ToNameSZ(BYTE FAR * destSZ, BYTE FAR * srcFCBName);
-int FileName83Length(BYTE * filename83);
+const char *ConvertNameSZToName83(char *destFCBName, const char *srcSZ);
 
 /* fatfs.c */
 struct dpb FAR *get_dpb(COUNT dsk);