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Update comments on the fossildelta extension. No changes to code.

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FossilOrigin-Name: 9da4fb59b28686630d63a79988b458726332cf06cc0e6e84d7c0a7600f5fcab0
This commit is contained in:
drh 2019-02-25 14:52:43 +00:00
parent 7edcb11ca7
commit c3017e7b4a
3 changed files with 42 additions and 12 deletions
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40
ext/misc/fossildelta.c
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@ -600,7 +600,7 @@ static int delta_apply(
}
/*
** SQL functions: fossildelta_create(X,Y)
** SQL functions: delta_create(X,Y)
**
** Return a delta for carrying X into Y.
*/
@ -635,7 +635,7 @@ static void deltaCreateFunc(
}
/*
** SQL functions: fossildelta_apply(X,D)
** SQL functions: delta_apply(X,D)
**
** Return the result of applying delta D to input X.
*/
@ -678,7 +678,7 @@ static void deltaApplyFunc(
/*
** SQL functions: fossildelta_output_size(D)
** SQL functions: delta_output_size(D)
**
** Return the size of the output that results from applying delta D.
*/
@ -704,8 +704,38 @@ static void deltaOutputSizeFunc(
}
}
/* The deltaparse(DELTA) table-valued function parses the DELTA in
** its input and returns a table that describes that delta.
/*****************************************************************************
** Table-valued SQL function: delta_parse(DELTA)
**
** Schema:
**
** CREATE TABLE delta_parse(
** op TEXT,
** a1 INT,
** a2 ANY,
** delta HIDDEN BLOB
** );
**
** Given an input DELTA, this function parses the delta and returns
** rows for each entry in the delta. The op column has one of the
** values SIZE, COPY, INSERT, CHECKSUM, ERROR.
**
** Assuming no errors, the first row has op='SIZE'. a1 is the size of
** the output in bytes and a2 is NULL.
**
** After the initial SIZE row, there are zero or more 'COPY' and/or 'INSERT'
** rows. A COPY row means content is copied from the source into the
** output. Column a1 is the number of bytes to copy and a2 is the offset
** into source from which to begin copying. An INSERT row means to
** insert text into the output stream. Column a1 is the number of bytes
** to insert and column is a BLOB that contains the text to be inserted.
**
** The last row of a well-formed delta will have an op value of 'CHECKSUM'.
** The a1 column will be the value of the checksum and a2 will be NULL.
**
** If the input delta is not well-formed, then a row with an op value
** of 'ERROR' is returned. The a1 value of the ERROR row is the offset
** into the delta where the error was encountered and a2 is NULL.
*/
typedef struct deltaparsevtab_vtab deltaparsevtab_vtab;
typedef struct deltaparsevtab_cursor deltaparsevtab_cursor;

12
manifest
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@ -1,5 +1,5 @@
C Fix\sa\stypo\sin\sthe\sdocumentation\sfor\ssqlite3_total_changes().
D 2019-02-25T14:16:19.183
C Update\scomments\son\sthe\sfossildelta\sextension.\s\sNo\schanges\sto\scode.
D 2019-02-25T14:52:43.832
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F Makefile.in 178d8eb6840771149cee40b322d1b3be30d330198c522c903c1b66fb5a1bfca4
@ -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 592d6531d8413d81b25f5a47a45d7e310e455d33e03a64c6ae85724c6524a5d5
F ext/misc/fossildelta.c 31b64084789228ac0d1113e5e39dc79c2ae16dd131d5c988ad9550ae1b9bc4b4
F ext/misc/fossildelta.c 3cc9a9b2f39889b43cd176c19f286bc7dd652f4c202c202d008481252d820316
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
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R b6b94692df1ff68d1775b0307c4b76d3
U drh
Z 55e24971867c6a920f00e5ee1b3ee79b
Z 398771f938c8db2543123478ba7fdec9

2
manifest.uuid
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@ -1 +1 @@
8474c1560e0c3a28c6a7ed360202a8e7caae3c8259f60bbfa6d2948ab7876f51
9da4fb59b28686630d63a79988b458726332cf06cc0e6e84d7c0a7600f5fcab0