New "tag data" container struct + some basic methods to deal with it

- to be used for passing around header and extension data
- inspired by similar changes in rpm5.org, details and implementation differ

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/rpmtd.c b/lib/rpmtd.c
new file mode 100644
index 000000000..50d2b0800
--- /dev/null
+++ b/lib/rpmtd.c
@@ -0,0 +1,47 @@
+#include "system.h"
+
+#include <rpm/rpmtd.h>
+#include <rpm/rpmstring.h>
+
+#include "debug.h"
+
+rpmtd rpmtdNew(void)
+{
+    rpmtd td = xmalloc(sizeof(*td));
+    rpmtdReset(td);
+    return td;
+}
+
+rpmtd rpmtdFree(rpmtd td)
+{
+    /* permit free on NULL td */
+    if (td != NULL) {
+	/* XXX should we free data too - a flag maybe? */
+	free(td);
+    }
+    return NULL;
+}
+
+void rpmtdReset(rpmtd td)
+{
+    assert(td != NULL);
+
+    memset(td, 0, sizeof(*td));
+    td->ix = -1;
+}
+
+void rpmtdFreeData(rpmtd td)
+{
+    assert(td != NULL);
+
+    if (td->freeData) {
+	free(td->data);
+    }
+    rpmtdReset(td);
+}
+
+rpm_count_t rpmtdCount(rpmtd td)
+{
+    assert(td != NULL);
+    return td->count;
+}