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add documentation, add safety check

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git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@9592 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Linas Vepstas 2003-10-20 13:06:13 +00:00
parent e23307d377
commit 5bae2ba525
2 changed files with 12 additions and 3 deletions
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4
src/engine/qofinstance.c
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@ -123,6 +123,10 @@ void
qof_instance_gemini (QofInstance *to, QofInstance *from)
{
time_t now;
/* Books must differ for a gemini to be meaningful */
if (!from || !to || (from->book == to->book)) return;
now = time(0);
/* Make a note of where the copy came from */

11
src/engine/qofinstance.h
View File

@ -60,9 +60,14 @@ KvpFrame* qof_instance_get_slots (QofInstance *);
/** return value of is_dirty flag */
gboolean qof_instance_is_dirty (QofInstance *);
/** pair things up. Currently, this routine only inserts a
* pair of guid-pointers pointing to each other. it
* doesn't copy any data.
/** Pair things up. This routine inserts a kvp value into each instance
* containing the guid of the other. In this way, if one has one of the
* pair, one can always find the other by looking up it's guid. Typically,
* you will want to use qof_instance_lookup_twin() to find the twin.
* (The current implementation assumes the two instances belong to different
* books, and will not add gemini kvp's unless the books differ. Note that
* the gemini kvp includes the book guid as well, so that the right book can
* be found.
*/
void qof_instance_gemini (QofInstance *to, QofInstance *from);