[tracker/binary-log] Improve db journal reader GErrors

[Martyn James Russell <mr src gnome org>]

commit 5554e707d7c3339a6f8cda4a528de714021cee48
Author: Martyn Russell <martyn lanedo com>
Date:   Tue Jan 5 09:42:38 2010 +0000

    Improve db journal reader GErrors

 src/libtracker-db/tracker-db-journal.c |   54 +++++++++++++++++++++++---------
 1 files changed, 39 insertions(+), 15 deletions(-)
---
diff --git a/src/libtracker-db/tracker-db-journal.c b/src/libtracker-db/tracker-db-journal.c
index 46ffd10..e5428d4 100644
--- a/src/libtracker-db/tracker-db-journal.c
+++ b/src/libtracker-db/tracker-db-journal.c
@@ -534,12 +534,14 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 		guint32 read_size;
 
 		if (entry->current >= entry->end) {
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "End of journal reached");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "End of journal reached");
 			return FALSE;
 		}
 
 		if (entry->end - entry->current < sizeof (guint32)) {
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < sizeof(guint32) at start/end of journal");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, < sizeof(guint32) at start/end of journal");
 			return FALSE;
 		}
 
@@ -548,7 +550,8 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 		entry->entry_end = entry->entry_begin + entry_size;
 
 		if (entry->end < entry->entry_end) {
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, end < entry end");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, end < entry end");
 			return FALSE;
 		}
 
@@ -559,7 +562,10 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 
 		if (entry_size != read_size) {
 			/* damaged journal entry */
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, %d != %d (size != size read)", entry_size, read_size);
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, %d != %d (size != size read)", 
+			             entry_size, 
+			             read_size);
 			return FALSE;
 		}
 
@@ -572,7 +578,8 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 		/* verify checksum */
 		if (crc32 != tracker_crc32 (entry->entry_begin, entry_size)) {
 			/* damaged journal entry */
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, crc32 failed");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, crc32 failed");
 			return FALSE;
 		}
 
@@ -583,7 +590,10 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 
 		if (entry->current + 4 != entry->entry_end) {
 			/* damaged journal entry */
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, current + 4 != entry end");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, %p != %p (end of transaction with 0 triples)",
+			             entry->current + 4,
+			             entry->entry_end);
 			return FALSE;
 		}
 
@@ -595,7 +605,9 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 
 		if (entry->end - entry->current < sizeof (guint32)) {
 			/* damaged journal entry */
-			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < sizeof(guint32)");
+			g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+			             "Damaged journal entry, %d < sizeof(guint32)",
+			             (gint) (entry->end - entry->current));
 			return FALSE;
 		}
 
@@ -607,7 +619,9 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 
 			if (entry->end - entry->current < sizeof (guint32) + 1) {
 				/* damaged journal entry */
-				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < sizeof(guint32) for RESOURCE");
+				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+				             "Damaged journal entry, %d < sizeof(guint32) + 1 for resource",
+				             (gint) (entry->end - entry->current));
 				return FALSE;
 			}
 
@@ -617,14 +631,16 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 			str_length = strnlen (entry->current, entry->end - entry->current);
 			if (str_length == entry->end - entry->current) {
 				/* damaged journal entry (no terminating '\0' character) */
-				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, no terminating zero found for RESOURCE");
+				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+				             "Damaged journal entry, no terminating zero found for resource");
 				return FALSE;
 
 			}
 
 			if (!g_utf8_validate (entry->current, -1, NULL)) {
 				/* damaged journal entry (invalid UTF-8) */
-				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, invalid UTF-8 for RESOURCE");
+				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+				             "Damaged journal entry, invalid UTF-8 for resource");
 				return FALSE;
 			}
 
@@ -647,7 +663,9 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 
 			if (entry->end - entry->current < 2 * sizeof (guint32)) {
 				/* damaged journal entry */
-				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < 2 * sizeof(guint32)");
+				g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+				             "Damaged journal entry, %d < 2 * sizeof(guint32)",
+				             (gint) (entry->end - entry->current));
 				return FALSE;
 			}
 
@@ -660,7 +678,9 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 			if (data_format & 2) {
 				if (entry->end - entry->current < sizeof (guint32)) {
 					/* damaged journal entry */
-					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < sizeof(guint32) for data format 2");
+					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+					             "Damaged journal entry, %d < sizeof(guint32) for data format 2",
+					             (gint) (entry->end - entry->current));
 					return FALSE;
 				}
 
@@ -669,20 +689,24 @@ tracker_db_journal_entry_next (TrackerDBJournalEntry  *entry,
 			} else {
 				if (entry->end - entry->current < 1) {
 					/* damaged journal entry */
-					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, < 1");
+					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+					             "Damaged journal entry, %d < 1",
+					             (gint) (entry->end - entry->current));
 					return FALSE;
 				}
 
 				str_length = strnlen (entry->current, entry->end - entry->current);
 				if (str_length == entry->end - entry->current) {
 					/* damaged journal entry (no terminating '\0' character) */
-					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, no terminating zero found");
+					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+					             "Damaged journal entry, no terminating zero found");
 					return FALSE;
 				}
 
 				if (!g_utf8_validate (entry->current, -1, NULL)) {
 					/* damaged journal entry (invalid UTF-8) */
-					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, "Damaged journal entry, invalid UTF-8");
+					g_set_error (error, TRACKER_DB_JOURNAL_ERROR, 0, 
+					             "Damaged journal entry, invalid UTF-8");
 					return FALSE;
 				}