From a69693ba6514c24961c7e4ca09e6f433b5a76bfc Mon Sep 17 00:00:00 2001
From: alex <alex@c028cbd2-c16b-5b4b-a496-9718f37d4682>
Date: Thu, 10 Nov 1994 14:15:41 +0000
Subject: [PATCH] Meccanismo di protezione per i files sovrascritti

git-svn-id: svn://10.65.10.50/trunk@588 c028cbd2-c16b-5b4b-a496-9718f37d4682
---
 include/isam.cpp | 72 ++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 66 insertions(+), 6 deletions(-)

diff --git a/include/isam.cpp b/include/isam.cpp
index d6d86774a..b98e60598 100755
--- a/include/isam.cpp
+++ b/include/isam.cpp
@@ -587,6 +587,52 @@ int TBaseisamfile::_open(unsigned int mode)
     _hfhd.len() = sizeof(TRecnotype);
     _hfhd.base() = 0;
   }
+
+  if (err == NOERR)
+  {
+    isdef * fh = filehnd();
+    const TRecnotype nitems = fh->i.Base[0].PEOX;
+
+    if (fh->d->EOX != nitems)
+    {
+      CHECKD(getkey() == 1, "La chiave corrente non e' 1 ma ", getkey()); 
+      TFilename fn = filename();
+
+      fn = fn.name();
+      if (yesno_box("La dimensione dell' archivio %s e' errata. Cerco di recuperarlo ?", (const char *) fn))
+      {
+        TDir d;
+        TString mess(80);
+      {
+        mess.format("Ricostruzione archivio %s : I Fase", (const char*) fn);
+        TProgind p(nitems ? nitems : 1, mess, TRUE, TRUE, 70);
+        
+        d.get(num(), _lock, _nordir, _sysdirop);
+        d.eod() = fh->d->EOD = nitems;
+        d.eox() = fh->d->EOX = nitems;
+        d.put(num(), _nordir, _sysdirop);
+        for (TRecnotype r = 1; r <= nitems; r++)
+        {
+          p.addstatus(1);
+          CRead(&fh->f, curr().string(), r, _nolock);
+          curr().discard();
+          CWrite(&fh->f, curr().string(), r, _nolock);
+        }
+      }
+        mess.format("Ricostruzione archivio %s : II Fase", (const char*) fn);
+        TProgind p(items() ? items() : 1, mess, TRUE, TRUE, 70);
+        for (first(); good(); next())
+        {
+          p.addstatus(1);
+          curr().recall();
+          rewrite();
+        }
+        message_box("L'archivio %s deve essere compattato", (const char *) fn);
+      }
+      else
+        fatal_box("L'archivio %s deve essere corretto prima di utilizzarlo", (const char *) fn);
+    }
+  }
   _recno = -1L;
   _current->_i = filehnd();
   setstatus(err);
@@ -894,11 +940,13 @@ int TSystemisamfile::update(TTrec& newrec, bool vis)
 {
   if (filehnd() != NULL)
     fatal_box("Can't update description for open file %s", filename());
+
   TDir           dir;
 
   dir.get(num(), _lock, _nordir, _sysdirop);
   const char p = *dir.name();
-  const bool toconvert = ((strcmp(prefhndl->name(), "com") == 0) ? p == '%' : p != '%');
+  const bool incom = strcmp(prefhndl->name(), "com") == 0;
+  const bool toconvert = (incom ? p == '%' : p != '%');
 
   int err = NOERR;
   TTrec  oldrec;
@@ -907,8 +955,16 @@ int TSystemisamfile::update(TTrec& newrec, bool vis)
   const bool lcf = getlcf(prefhndl->filelevel());
 
   if (!lcf && newrec == oldrec) return NOERR;
+
   const TRecnotype nitems = dir.eod();
   const unsigned int lenr = newrec.len();
+
+  if (!toconvert && dir.eox() > 0L)
+  {
+    dir.eod() = 0L; 
+    dir.eox() = 0L;
+  }
+
   if (toconvert && dir.eox() > 0L)
   {
     TRecnotype ni = 0L;
@@ -1036,7 +1092,7 @@ int TSystemisamfile::load(const char* from, char fs, char fd, char rs, bool vis)
     f.equal();
     const long level = atol(f.line());
     if (level > stdlevel)
-      error_box("L' archivio %s e' stato generato con gli archivi di livello %ld%/%ld.\n Il livello attuale e' %ld/%ld.\n Convertire gli archivi e ripetere l' operazione.", from, level / 100, level % 100, stdlevel / 100, stdlevel % 100);
+      error_box("L' archivio %s e' stato generato con gli archivi di livello %ld%/%ld.\\n Il livello attuale e' %ld/%ld.\\n Convertire gli archivi e ripetere l' operazione.", from, level / 100, level % 100, stdlevel / 100, stdlevel % 100);
     lcf = getlcf(level);
     nflds = 0;
     TToken_string s2(f.line());
@@ -1079,20 +1135,22 @@ int TSystemisamfile::load(const char* from, char fs, char fd, char rs, bool vis)
   {
     error_box("Formato dei dati non valido");
     close();
-    return 1;
+    err = 1;
+    setstatus(err);
+    return err;
   }
   
   if (fd) sfd << fd;
   int last = NOERR;    
   
-  s1.format("Imp. archivio %s\n%6ld records %6ld errori - %3d", filename(), r, e, last);
+  s1.format("Imp. archivio %s\\n%6ld records %6ld errori - %3d", filename(), r, e, last);
   TProgind p(nitems, s1, TRUE, TRUE, 70);
   s = f.line();
   while (s.not_empty() && !p.iscancelled())
   {
     if ((r + e) % 50 == 0)
     {
-      s1.format("Imp. archivio %s\n%6ld rec. %6ld errori - %3d", filename(), r, e, last);
+      s1.format("Imp. archivio %s\\n%6ld records %6ld errori - %3d", filename(), r, e, last);
       p.set_text(s1);
     }
     p.setstatus(nread + 1);
@@ -1131,9 +1189,10 @@ int TSystemisamfile::load(const char* from, char fs, char fd, char rs, bool vis)
     }
     s = f.line();
   }
-  s1.format("Imp. archivio %s : %6ld rec. %6ld errori - %3d", filename(), r, e, last);
+  s1.format("Imp. archivio %s\\n%6ld records %6ld errori - %3d", filename(), r, e, last);
   p.set_text(s1);
   close();
+  setstatus(err);
   return err;
 }
 
@@ -1213,6 +1272,7 @@ int TSystemisamfile::dump(const char* to, int nkey, char fs, char fd, char rs, b
   {
     for (i = 0; i < nitems && !p.iscancelled(); i++)
     {
+      zero();
       p.setstatus(i + 1);
       readat(i + 1);
       s="";