QUERYCHANGESFUNC

This is a callback function used by the SccQueryChanges Function operation to enumerate a collection of file names and determine each file's status.

The SccQueryChanges function is given a list of files and a pointer to the QUERYCHANGESFUNC callback. The source control plug-in enumerates over the given list and provides status (via this callback) for each file in the list.

Signature

typedef BOOL (*QUERYCHANGESFUNC)(
   LPVOID pvCallerData,
   QUERYCHANGESDATA * pChangesData
);

Parameters

• pvCallerData
  [in] The pvCallerData parameter passed by the caller (the IDE) to SccQueryChanges Function. The source control plug-in should make no assumptions about the contents of this value.

• pChangesData
  [in] Pointer to a QUERYCHANGESDATA structure describing the changes to a file.

Return Value

The IDE returns an appropriate error code:

Value	Description
SCC_OK	Continue processing.
SCC_I_OPERATIONCANCELED	Stop processing.
SCC_E_xxx	Any appropriate SCC error should stop processing.

QUERYCHANGESDATA Structure

The structure passed in for each file looks like the following:

struct QUERYCHANGESDATA_A
{
    DWORD  dwSize;
    LPCSTR lpFileName;
    DWORD  dwChangeType;
    LPCSTR lpLatestName;
};

typedef struct QUERYCHANGESDATA_A QUERYCHANGESDATA;

struct QUERYCHANGESDATA_W
{
    DWORD   dwSize;
    LPCWSTR lpFileName;
    DWORD   dwChangeType;
    LPCWSTR lpLatestName;
};

• dwSize
  Size of this structure (in bytes).

• lpFileName
  The original file name for this item.

• dwChangeType
  Code indicating status of the file:

  Code	Description
  SCC_CHANGE_UNKNOWN	Cannot tell what has changed.
  SCC_CHANGE_UNCHANGED	No name changes for this file.
  SCC_CHANGE_DIFFERENT	File with a different identity, but the same name exists in the database.
  SCC_CHANGE_NONEXISTENT	File does not exist either in the database or locally.
  SCC_CHANGE_DATABASE_DELETED	File deleted in the database.
  SCC_CHANGE_LOCAL_DELETED	File deleted locally but the file still exists in the database. If this cannot be determined, return SCC_CHANGE_DATABASE_ADDED.
  SCC_CHANGE_DATABASE_ADDED	File added to the database but does not exist locally.
  SCC_CHANGE_LOCAL_ADDED	File does not exist in database and is a new local file.
  SCC_CHANGE_RENAMED_TO	File renamed or moved in the database as lpLatestName.
  SCC_CHANGE_RENAMED_FROM	File renamed or moved in the database from lpLatestName; if this is too expensive to track, return a different flag, such as SCC_CHANGE_DATABASE_ADDED.

• lpLatestName
  The current file name for this item.

See Also

Reference

SccQueryChanges Function

Concepts

Error Codes

Other Resources

Callback Functions Implemented by the IDE