database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-05 15:55:57 +03:00
Code Activity

Updated header comments in wal.c. No functional code changes.

Browse Source 
FossilOrigin-Name: 687632a6b3a0aeb006c1eda5c27d5489f08c230e
This commit is contained in:
drh
2010-05-25 15:53:31 +00:00
parent fa408ada0a
commit 51b21b169a
3 changed files with 27 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/wal.c
View File

@@ -68,6 +68,15 @@
** The checksum is computed using 32-bit big-endian integers if the
** magic number in the first 4 bytes of the WAL is 0x377f0683 and it
** is computed using little-endian if the magic number is 0x377f0682.
** The checksum values are always stored in the frame header in a
** big-endian format regardless of which byte order is used to compute
** the checksum. The checksum is computed by interpreting the input as
** an even number of unsigned 32-bit integers: x[0] through x[N]. The
**
** for i from 0 to n-1 step 2:
** s0 += x[i] + s1;
** s1 += x[i+1] + s0;
** endfor
**
** On a checkpoint, the WAL is first VFS.xSync-ed, then valid content of the
** WAL is transferred into the database, then the database is VFS.xSync-ed.