From e92b7962158397c518c8ad21848dcd7cce6147c9 Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Wed, 7 May 2008 21:43:25 +0000
Subject: [PATCH] New API function isoburn_read_iso_head()

---
 libisoburn/burn_wrap.c      | 16 +++++++++-------
 libisoburn/libisoburn.h     | 17 +++++++++++++++++
 xorriso/xorriso_timestamp.h |  2 +-
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/libisoburn/burn_wrap.c b/libisoburn/burn_wrap.c
index 8453c1f8..91f6a214 100644
--- a/libisoburn/burn_wrap.c
+++ b/libisoburn/burn_wrap.c
@@ -925,10 +925,11 @@ int isoburn_report_iso_error(int iso_error_code, char msg_text[], int os_errno,
 }
 
 
-/* @param flag bit0-7: info return mode
+/* API
+   @param flag bit0-7: info return mode
                0= do not return anything in info (do not even touch it)
                1= return volume id 
-   @return 1 seems to be a valid ISO image , 0 seems not to be ISO, <0 error
+   @return 1 seems to be a valid ISO image , 0 format not recognized, <0 error
 */
 int isoburn_read_iso_head(struct burn_drive *d, int lba,
                           int *image_blocks, char *info, int flag)
@@ -937,6 +938,7 @@ int isoburn_read_iso_head(struct burn_drive *d, int lba,
  int ret, i, info_mode;
  off_t data_count;
 
+ *image_blocks= 0;
  ret = burn_read_data(d, ((off_t) lba) * (off_t) 2048, (char *) buffer,
                       (off_t) 64*1024, &data_count, 2); /* no error messages */
  if(ret<=0)
@@ -945,7 +947,7 @@ int isoburn_read_iso_head(struct burn_drive *d, int lba,
  data= buffer+32*1024;
  /* is this an ISO image ? */
  if(data[0]!=1)
-  return(0);
+   return(0);
  if(strncmp((char *) (data+1),"CD001",5)!=0)
    return(0);
 
@@ -1174,16 +1176,16 @@ failure:;
 int isoburn_toc_disc_get_sectors(struct isoburn_toc_disc *disc)
 {
  struct isoburn_toc_entry *t;
- int count= 0;
+ int ret= 0;
 
  if(disc==NULL)
    return(0);
  if(disc->toc!=NULL) {
    for(t= disc->toc; t!=NULL; t= t->next)
-     count+= t->track_blocks;
+     ret= t->start_lba + t->track_blocks;
  } else if(disc->disc!=NULL)
-   count= burn_disc_get_sectors(disc->disc);
- return(count);
+   ret= burn_disc_get_sectors(disc->disc);
+ return(ret);
 }
 
 
diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index ab6756ee..122db931 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -495,6 +495,23 @@ void isoburn_toc_track_get_entry(struct isoburn_toc_track *t,
 void isoburn_toc_disc_free(struct isoburn_toc_disc *disc);
 
 
+/** Try whether at the data at the given address look like a ISO 9660
+    image header and obtain its alleged size. Depending on the info mode
+    one other string of text information can be retrieved too.
+    @since 0.1.6
+    @param drive The drive with the media to inspect
+    @param lba   The block number from where to read
+    @param image_blocks  The number of 2048 bytes blocks
+    @param info  Caller provided memory, enough to take eventual info reply
+    @param flag bit0-7: info return mode
+                0= do not return anything in info (do not even touch it)
+                1= return volume id (info needs 33 bytes)
+    @return 1 seems to be a valid ISO image , 0 format not recognized, <0 error
+*/
+int isoburn_read_iso_head(struct burn_drive *d, int lba,
+                          int *image_blocks, char *info, int flag);
+
+
 /* ----------------------------------------------------------------------- */
 /*
 
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 4b6c9a70..909e160c 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2008.05.07.175640"
+#define Xorriso_timestamP "2008.05.07.214343"