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linelog: implement trivial APIs

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Summary: Implement the trivial APIs declared in D3628681.

Test Plan:
`gcc -Wall -Wextra -Wconversion -c linelog.c` and it only reports
"defined but not used" warnings.

Reviewers: #mercurial, ttung, simonfar

Reviewed By: simonfar

Subscribers: simonfar, mjpieters

Differential Revision: https://phabricator.intern.facebook.com/D3629389

Tasks: 12416202

Signature: t1:3629389:1470087604:5b5a536630a6866df52d51fd163ed8f5301c734b
This commit is contained in:
Jun Wu 2016-07-27 19:25:31 +01:00
parent a84fdfb62a
commit 28e914db8e
1 changed files with 30 additions and 0 deletions
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30
linelog/linelog.c
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@ -135,3 +135,33 @@ static linelog_result reservelines(linelog_annotateresult *ar,
}
return LINELOG_RESULT_OK;
}
/* APIs declared in .h */
void linelog_annotateresult_clear(linelog_annotateresult *ar) {
free(ar->lines);
memset(ar, 0, sizeof(linelog_annotateresult));
}
linelog_result linelog_clear(linelog_buf *buf) {
linelog_inst insts[2] = { { .offset = 2 }, { .offset = 0 } };
returnonerror(writeinst(buf, &insts[1], 1));
returnonerror(writeinst(buf, &insts[0], 0));
return LINELOG_RESULT_OK;
}
size_t linelog_getactualsize(const linelog_buf *buf) {
linelog_inst inst0;
linelog_result r = readinst(buf, &inst0, 0);
if (r != LINELOG_RESULT_OK)
return 0;
return (size_t)(inst0.offset) * INST_SIZE;
}
linelog_revnum linelog_getmaxrev(const linelog_buf *buf) {
linelog_inst inst0;
linelog_result r = readinst(buf, &inst0, 0);
if (r != LINELOG_RESULT_OK)
return 0;
return inst0.rev;
}