Work on bug #550: Avoid exit. In particular the mfile/cfile/bfile has

[idzebra-moved-to-github.git] / isamb / isamb.c

diff --git a/isamb/isamb.c b/isamb/isamb.c
index bb51393..8e464ba 100644 (file)
--- a/isamb/isamb.c
+++ b/isamb/isamb.c
@@ -1,4 +1,4 @@
-/* $Id: isamb.c,v 1.83 2006-08-14 10:40:17 adam Exp $
+/* $Id: isamb.c,v 1.85 2006-11-14 08:12:08 adam Exp $
    Copyright (C) 1995-2006
    Index Data ApS
 
@@ -157,14 +157,13 @@ static void encode_ptr(char **dst, zint pos)
 
 #define decode_item_len decode_ptr
 #if ISAMB_PTR_CODEC
-static void decode_ptr(const char **src1, zint *pos)
+static void decode_ptr(const char **src, zint *pos)
 {
-    const unsigned char **src = (const unsigned char **) src1;
     zint d = 0;
     unsigned char c;
     unsigned r = 0;
 
-    while (((c = *(*src)++) & 128))
+    while (((c = *(const unsigned char *)((*src)++)) & 128))
     {
         d += ((zint) (c & 127) << r);
        r += 7;
@@ -200,12 +199,19 @@ ISAMB isamb_open(BFiles bfs, const char *name, int writeflag, ISAMC_M *method,
 
     assert(cache == 0);
     isamb->file = xmalloc(sizeof(*isamb->file) * isamb->no_cat);
+
+    for (i = 0; i < isamb->no_cat; i++)
+    {
+        isamb->file[i].bf = 0;
+        isamb->file[i].head_dirty = 0;
+        isamb->file[i].cache_entries = 0;
+    }
+
     for (i = 0; i < isamb->no_cat; i++)
     {
         char fname[DST_BUF_SIZE];
        char hbuf[DST_BUF_SIZE];
-        isamb->file[i].cache_entries = 0;
-        isamb->file[i].head_dirty = 0;
+
         sprintf(fname, "%s%c", name, i+'A');
         if (cache)
             isamb->file[i].bf = bf_open(bfs, fname, ISAMB_CACHE_ENTRY_SIZE,
@@ -213,6 +219,12 @@ ISAMB isamb_open(BFiles bfs, const char *name, int writeflag, ISAMC_M *method,
         else
             isamb->file[i].bf = bf_open(bfs, fname, b_size, writeflag);
 
+        if (!isamb->file[i].bf)
+        {
+            isamb_close(isamb);
+            return 0;
+        }
+
         /* fill-in default values (for empty isamb) */
        isamb->file[i].head.first_block = ISAMB_CACHE_ENTRY_SIZE/b_size+1;
        isamb->file[i].head.last_block = isamb->file[i].head.first_block;
@@ -415,7 +427,8 @@ void isamb_close (ISAMB isamb)
                bf_write(isamb->file[i].bf, pos, 0, 0, hbuf + pos*b_size);
            }
        }
-        bf_close (isamb->file[i].bf);
+        if (isamb->file[i].bf)
+            bf_close (isamb->file[i].bf);
     }
     xfree(isamb->file);
     xfree(isamb->method);