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Improved comments on the fossildelta.c extension.

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FossilOrigin-Name: d7d23f0450d659b2c7df34e4df8623ca7b6fe3bd19422e3e9234515214ae8510
This commit is contained in:
drh 2019-03-02 20:09:35 +00:00
parent e22976c535
commit 75db74fdae
3 changed files with 26 additions and 8 deletions
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20
ext/misc/fossildelta.c
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@ -10,7 +10,25 @@
**
******************************************************************************
**
** This SQLite extension implements the delta functions used by Fossil.
** 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>

12
manifest
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@ -1,5 +1,5 @@
C Fix\sthe\sSQLITE_DIRECT_OVERFLOW_READ\scompile-time\soption\sso\sthat\sit\sworks\nwith\sSQLITE_HAS_CODEC.
D 2019-03-02T15:25:24.014
C Improved\scomments\son\sthe\sfossildelta.c\sextension.
D 2019-03-02T20:09:35.788
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F Makefile.in 1ad7263f38329c0ecea543c80f30af839ee714ea77fc391bf1a3fbb919a5b6b5
@ -286,7 +286,7 @@ F ext/misc/dbdump.c baf6e37447c9d6968417b1cd34cbedb0b0ab3f91b5329501d8a8d5be3287
F ext/misc/eval.c 4b4757592d00fd32e44c7a067e6a0e4839c81a4d57abc4131ee7806d1be3104e
F ext/misc/explain.c d5c12962d79913ef774b297006872af1fccda388f61a11d37758f9179a09551f
F ext/misc/fileio.c e7864c391e14ccaf73ee4b22f5a55c1eb40ecc93a7f5ee77a1b41b87367ec7ae
F ext/misc/fossildelta.c 3cc9a9b2f39889b43cd176c19f286bc7dd652f4c202c202d008481252d820316
F ext/misc/fossildelta.c 910510968a30ab77b8ac1a27931f2cb834e9db9fd5ab122f53b6045b4315665d
F ext/misc/fuzzer.c 9e79c337faffdd4c5fe4485467537438359b43e0858a40038d4300b894ff553f
F ext/misc/ieee754.c f190d0cc5182529acb15babd177781be1ac1718c
F ext/misc/json1.c 8af4672f43634257dbcfdb4515b4070325463d67c6968b4be1bd414de28d4d58
@ -1805,7 +1805,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P d49c32e6e7cc341b5961d2c7b7c68d1649c6542eeec201660e3f82a55aea9e3b
R 50571770f9cddd9f6937b98986c246b4
P fd085e9260bec18f968704abb2dd324d954baa121d13b67c3f5b801e9e3834aa
R 2f413ab89884ce894ab037220c4ef892
U drh
Z 39fd6294d7f36d7da03a65b55eee9cda
Z 4ebc8a2db088c512de2eab3689f25c24

2
manifest.uuid
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@ -1 +1 @@
fd085e9260bec18f968704abb2dd324d954baa121d13b67c3f5b801e9e3834aa
d7d23f0450d659b2c7df34e4df8623ca7b6fe3bd19422e3e9234515214ae8510