This is a version of g_file_enumerator_next_file() that's easier to
use correctly from C programs. With g_file_enumerator_next_file(),
the gboolean return value signifies "end of iteration or error", which
requires allocation of a temporary #GError.
In contrast, with this function, a %FALSE return from
gs_file_enumerator_iterate() *always* means
"error". End of iteration is signaled by @out_info or @out_child being %NULL.
Another crucial difference is that the references for @out_info and
@out_child are owned by @direnum (they are cached as hidden
properties). You must not unref them in your own code. This makes
memory management significantly easier for C code in combination
with loops.
Finally, this function optionally allows retrieving a #GFile as
well.
You must specify at least one of @out_info or @out_child.
The code pattern for correctly using g_file_enumerator_iterate() from C
is:
|[
direnum = g_file_enumerate_children (file, ...);
while (TRUE)
{
GFileInfo *info;
if (!g_file_enumerator_iterate (direnum, &info, NULL, cancellable, error))
goto out;
if (!info)
break;
... do stuff with "info"; do not unref it! ...
}
out:
g_object_unref (direnum); // Note: frees the last @info
]|
This is a version of g_file_enumerator_next_file() that's easier to use correctly from C programs. With g_file_enumerator_next_file(), the gboolean return value signifies "end of iteration or error", which requires allocation of a temporary #GError.
In contrast, with this function, a %FALSE return from gs_file_enumerator_iterate() *always* means "error". End of iteration is signaled by @out_info or @out_child being %NULL.
Another crucial difference is that the references for @out_info and @out_child are owned by @direnum (they are cached as hidden properties). You must not unref them in your own code. This makes memory management significantly easier for C code in combination with loops.
Finally, this function optionally allows retrieving a #GFile as well.
You must specify at least one of @out_info or @out_child.
The code pattern for correctly using g_file_enumerator_iterate() from C is:
|[ direnum = g_file_enumerate_children (file, ...); while (TRUE) { GFileInfo *info; if (!g_file_enumerator_iterate (direnum, &info, NULL, cancellable, error)) goto out; if (!info) break; ... do stuff with "info"; do not unref it! ... }
out: g_object_unref (direnum); // Note: frees the last @info ]|