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Overview
Comment: | Improved comments on the fossildelta.c extension. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
d7d23f0450d659b2c7df34e4df8623ca |
User & Date: | drh 2019-03-02 20:09:35.788 |
Context
2019-03-04
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07:15 | Fix a problem preventing compilation with SQLITE_OMIT_UTF16. (check-in: 906d1fd865 user: dan tags: trunk) | |
2019-03-02
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20:09 | Improved comments on the fossildelta.c extension. (check-in: d7d23f0450 user: drh tags: trunk) | |
15:25 | Fix the SQLITE_DIRECT_OVERFLOW_READ compile-time option so that it works with SQLITE_HAS_CODEC. (check-in: fd085e9260 user: drh tags: trunk) | |
Changes
Changes to ext/misc/fossildelta.c.
1 2 3 4 5 6 7 8 9 10 11 12 | /* ** 2019-02-19 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ****************************************************************************** ** | | > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | /* ** 2019-02-19 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ****************************************************************************** ** ** This SQLite extension implements the delta functions used by the RBU ** extension. Three scalar functions and one table-valued function are ** implemented here: ** ** delta_apply(X,D) -- apply delta D to file X and return the result ** delta_create(X,Y) -- compute and return a delta that carries X into Y ** delta_output_size(D) -- blob size in bytes output from applying delta D ** delta_parse(D) -- returns rows describing delta D ** ** The delta format is the Fossil delta format, described in a comment ** on the delete_create() function implementation below, and also at ** ** https://www.fossil-scm.org/fossil/doc/trunk/www/delta_format.wiki ** ** This delta format is used by the RBU extension, which is the main ** reason that these routines are included in the extension library. ** RBU does not use this extension directly. Rather, this extension is ** provided as a convenience to developers who want to analyze RBU files ** that contain deltas. */ #include <string.h> #include <assert.h> #include <stdlib.h> #include "sqlite3ext.h" SQLITE_EXTENSION_INIT1 |
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