Initial revision

diff --git a/lib/sq.c b/lib/sq.c
new file mode 100644 (file)
index 0000000..fd2d163
--- /dev/null
+++ b/lib/sq.c
@@ -0,0 +1,103 @@
+/* $Header$
+ *
+ * Generic Queue Routines
+ */
+
+#include "sms_app.h"
+
+struct save_queue *
+sq_create()
+{
+    register struct save_queue *sq;
+
+    sq = (struct save_queue *)malloc(sizeof (struct save_queue));
+    sq->q_next = sq;
+    sq->q_prev = sq;
+    sq->q_lastget = 0;
+    return(sq);
+}
+
+sq_save_data(sq, data)
+    register struct save_queue *sq;
+    char *data;
+{
+    register struct save_queue *q;
+
+    q = (struct save_queue *)malloc(sizeof (struct save_queue));
+    q->q_next = sq;
+    q->q_prev = sq->q_prev;
+    sq->q_prev->q_next = q;
+    sq->q_prev = q;
+    q->q_data = data;
+}
+
+sq_save_args(argc, argv, sq)
+    register struct save_queue *sq;
+    register int argc;
+    register char *argv[];
+{
+    register char **argv_copy;
+    register int i;
+    register int n;
+
+    argv_copy = (char **)malloc(argc * sizeof (char *));
+    for (i = 0; i < argc; i++) {
+       n = strlen(argv[i]) + 1;
+       argv_copy[i] = (char *)malloc(n);
+       bcopy(argv[i], argv_copy[i], n);
+    }
+
+    sq_save_data(sq, argv_copy);
+}
+
+sq_save_unique_data(sq, data)
+    register struct save_queue *sq;
+    char *data;
+{
+    register struct save_queue *q;
+
+    for (q = sq->q_next; q != sq; q = q->q_next)
+       if (q->q_data == data) return;
+
+    sq_save_data(sq, data);
+}
+
+sq_save_unique_string(sq, data)
+    register struct save_queue *sq;
+    char *data;
+{
+    register struct save_queue *q;
+
+    for (q = sq->q_next; q != sq; q = q->q_next)
+       if (!strcmp(q->q_data, data)) return;
+
+    sq_save_data(sq, data);
+}
+
+sq_get_data(sq, data)
+    register struct save_queue *sq;
+    register char **data;
+{
+    if (sq->q_lastget == (struct save_queue *)0) {
+       sq->q_lastget = sq->q_next;
+    } else {
+       sq->q_lastget = sq->q_lastget->q_next;
+    }
+
+    if (sq->q_lastget == sq) return(0);
+    *data = sq->q_lastget->q_data;
+    return(1);
+}
+
+sq_destroy(sq)
+    register struct save_queue *sq;
+{
+    register struct save_queue *q;
+
+    for (q = sq->q_next; q != sq; q = sq->q_next) {
+       sq->q_next = q->q_next;
+       free(q);                        
+    }
+    free(sq);
+}
+