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Code Issues Releases Activity

Add pgLsnFromStr(), pgLsnToStr(), and pgLsnToWalSegment().

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This commit is contained in:
David Steele
2019-12-08 14:19:47 -05:00
parent f517b141fb
commit 2cfde18755
4 changed files with 70 additions and 1 deletions
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47
src/postgres/interface.c
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@ -571,6 +571,53 @@ pgTablespaceId(unsigned int pgVersion)
FUNCTION_TEST_RETURN(result);
}
/**********************************************************************************************************************************/
uint64_t
pgLsnFromStr(const String *lsn)
{
FUNCTION_TEST_BEGIN();
FUNCTION_TEST_PARAM(STRING, lsn);
FUNCTION_TEST_END();
uint64_t result = 0;
MEM_CONTEXT_TEMP_BEGIN()
{
StringList *lsnPart = strLstNewSplit(lsn, FSLASH_STR);
CHECK(strLstSize(lsnPart) == 2);
result = (cvtZToUInt64Base(strPtr(strLstGet(lsnPart, 0)), 16) << 32) + cvtZToUInt64Base(strPtr(strLstGet(lsnPart, 1)), 16);
}
MEM_CONTEXT_TEMP_END();
FUNCTION_TEST_RETURN(result);
}
String *
pgLsnToStr(uint64_t lsn)
{
FUNCTION_TEST_BEGIN();
FUNCTION_TEST_PARAM(UINT64, lsn);
FUNCTION_TEST_END();
FUNCTION_TEST_RETURN(strNewFmt("%x/%x", (unsigned int)(lsn >> 32), (unsigned int)(lsn & 0xFFFFFFFF)));
}
/**********************************************************************************************************************************/
String *
pgLsnToWalSegment(uint32_t timeline, uint64_t lsn, unsigned int walSegmentSize)
{
FUNCTION_TEST_BEGIN();
FUNCTION_TEST_PARAM(UINT, timeline);
FUNCTION_TEST_PARAM(UINT64, lsn);
FUNCTION_TEST_PARAM(UINT, walSegmentSize);
FUNCTION_TEST_END();
FUNCTION_TEST_RETURN(
strNewFmt("%08X%08X%08X", timeline, (unsigned int)(lsn >> 32), (unsigned int)(lsn & 0xFFFFFFFF / walSegmentSize)));
}
/**********************************************************************************************************************************/
const String *
pgLsnName(unsigned int pgVersion)