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[ctree] method to update a manifest entry's node and flags

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Summary: This is needed when we're updating a node that already exists.

Test Plan: used in later diff.

Reviewers: #fastmanifest, durham

Reviewed By: durham

Subscribers: mitrandir, mjpieters

Differential Revision: https://phabricator.intern.facebook.com/D3832631

Signature: t1:3832631:1473362920:8a39f02ced91cc9328c57e416d7dfc9a704b0cc6
This commit is contained in:
Tony Tung 2016-09-08 13:39:48 -07:00
parent d7fb495d51
commit 54195bfd97
2 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
remotefilelog/ctreemanifest/manifest_entry.cpp
View File

@ -119,3 +119,33 @@ Manifest *ManifestEntry::get_manifest(
return this->resolved;
}
void ManifestEntry::update(const char *node, char flag) {
// we cannot flip between file and directory.
bool wasdir = this->flag != NULL && *this->flag == MANIFEST_DIRECTORY_FLAG;
bool willbedir = flag == MANIFEST_DIRECTORY_FLAG;
if (wasdir != willbedir) {
throw std::logic_error("changing to/from directory is not permitted");
}
// if we didn't previously own the memory, we should now.
if (this->ownedmemory == NULL) {
this->initialize(this->filename, this->filenamelen, node, flag);
return;
}
// initialize node if it's not already done.
if (this->node == NULL) {
this->node = this->filename + this->filenamelen + 1;
}
memcpy(this->node, node, HEX_NODE_SIZE);
if (flag == '\0') {
*(this->filename + this->filenamelen + 1 + HEX_NODE_SIZE) = '\n';
this->flag = NULL;
} else {
this->flag = this->filename + filenamelen + 1 + HEX_NODE_SIZE;
*this->flag = flag;
}
}

2
remotefilelog/ctreemanifest/manifest_entry.h
View File

@ -64,6 +64,8 @@ class ManifestEntry {
const char *filename, const size_t filenamelen,
const char *node,
char flag);
void update(const char *node, char flag);
};
#endif //REMOTEFILELOG_MANIFEST_ENTRY_H