(Slightly scrappy) new playlist box

[disorder] / lib / queue.c

diff --git a/lib/queue.c b/lib/queue.c
index 2b10f7a2264636a21461b6ab86f7ba6ea4060207..69a798696737e9f2d2efe629cffc62e3839d444b 100644 (file)
--- a/lib/queue.c
+++ b/lib/queue.c
@@ -1,28 +1,25 @@
 /*
  * This file is part of DisOrder.
- * Copyright (C) 2004-2008 Richard Kettlewell
+ * Copyright (C) 2004-2009 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+/** @file lib/queue.c
+ * @brief Track queues
+ */
+#include "common.h"
 
-#include <config.h>
-#include "types.h"
-
-#include <string.h>
-#include <stdio.h>
 #include <errno.h>
 #include <stddef.h>
 
@@ -34,7 +31,7 @@
 #include "table.h"
 #include "printf.h"
 
-const char *playing_states[] = {
+const char *const playing_states[] = {
   "failed",
   "isscratch",
   "no_player",
@@ -47,8 +44,34 @@ const char *playing_states[] = {
   "unplayed"
 };
 
+/** @brief String values for @c origin field */
+const char *const track_origins[] = {
+  "adopted",
+  "picked",
+  "random",
+  "scheduled",
+  "scratch",
+};
+
 #define VALUE(q, offset, type) *(type *)((char *)q + offset)
 
+/** @brief Insert queue entry @p n just after @p b
+ * @param b Insert after this entry
+ * @param n New entry to insert
+ */
+void queue_insert_entry(struct queue_entry *b, struct queue_entry *n) {
+  n->prev = b;
+  n->next = b->next;
+  n->next->prev = n;
+  n->prev->next = n;
+}
+
+/* remove an entry from a doubly-linked list */
+void queue_delete_entry(struct queue_entry *node) {
+  node->next->prev = node->prev;
+  node->prev->next = node->next;
+}
+
 static int unmarshall_long(char *data, struct queue_entry *q,
                           size_t offset,
                           void (*error_handler)(const char *, void *),
@@ -66,9 +89,9 @@ static const char *marshall_long(const struct queue_entry *q, size_t offset) {
 
   n = byte_snprintf(buffer, sizeof buffer, "%ld", VALUE(q, offset, long));
   if(n < 0)
-    fatal(errno, "error converting int");
+    disorder_fatal(errno, "error converting int");
   else if((size_t)n >= sizeof buffer)
-    fatal(0, "long converted to decimal is too long");
+    disorder_fatal(0, "long converted to decimal is too long");
   return xstrdup(buffer);
 }
 
@@ -105,9 +128,9 @@ static const char *marshall_time_t(const struct queue_entry *q, size_t offset) {
   n = byte_snprintf(buffer, sizeof buffer,
                    "%"PRIdMAX, (intmax_t)VALUE(q, offset, time_t));
   if(n < 0)
-    fatal(errno, "error converting time");
+    disorder_fatal(errno, "error converting time");
   else if((size_t)n >= sizeof buffer)
-    fatal(0, "time converted to decimal is too long");
+    disorder_fatal(0, "time converted to decimal is too long");
   return xstrdup(buffer);
 }
 
@@ -128,10 +151,31 @@ static int unmarshall_state(char *data, struct queue_entry *q,
   return 0;
 }
 
+static int unmarshall_origin(char *data, struct queue_entry *q,
+                             size_t offset,
+                             void (*error_handler)(const char *, void *),
+                             void *u) {
+  int n;
+
+  if((n = table_find(track_origins, 0, sizeof (char *),
+                    sizeof track_origins / sizeof *track_origins,
+                    data)) < 0) {
+    D(("origin=[%s] n=%d", data, n));
+    error_handler("invalid origin", u);
+    return -1;
+  }
+  VALUE(q, offset, enum track_origin) = n;
+  return 0;
+}
+
 static const char *marshall_state(const struct queue_entry *q, size_t offset) {
   return playing_states[VALUE(q, offset, enum playing_state)];
 }
 
+static const char *marshall_origin(const struct queue_entry *q, size_t offset) {
+  return track_origins[VALUE(q, offset, enum track_origin)];
+}
+
 #define F(n, h) { #n, offsetof(struct queue_entry, n), marshall_##h, unmarshall_##h }
 
 static const struct field {
@@ -145,6 +189,7 @@ static const struct field {
   /* Keep this table sorted. */
   F(expected, time_t),
   F(id, string),
+  F(origin, origin),
   F(played, time_t),
   F(scratched, string),
   F(sofar, long),
@@ -161,6 +206,7 @@ int queue_unmarshall(struct queue_entry *q, const char *s,
   char **vec;
   int nvec;
 
+  q->pid = -1;                          /* =none */
   if(!(vec = split(s, &nvec, SPLIT_QUOTES, error_handler, u)))
     return -1;
   return queue_unmarshall_vec(q, nvec, vec, error_handler, u);
@@ -177,7 +223,7 @@ int queue_unmarshall_vec(struct queue_entry *q, int nvec, char **vec,
   }
   while(*vec) {
     D(("key %s value %s", vec[0], vec[1]));
-    if((n = TABLE_FIND(fields, struct field, name, *vec)) < 0) {
+    if((n = TABLE_FIND(fields, name, *vec)) < 0) {
       error_handler("unknown key in queue data", u);
       return -1;
     } else {