From 7f1b0fb8bbd4f8c4f07c7d86fb8de0050d925f46 Mon Sep 17 00:00:00 2001
From: Christian Heller <c.heller@plomlompom.de>
Date: Mon, 3 Jun 2013 19:58:57 +0200
Subject: [PATCH] -s takes optional argument: number of turn from which to
 start replay.

---
 README      |  3 ++-
 roguelike.c | 21 +++++++++++++++------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/README b/README
index a395d4b..beadb16 100644
--- a/README
+++ b/README
@@ -59,4 +59,5 @@ Replay game recording
 Run "./roguelike -s" to watch a recording of the current game from the
 beginning. Hit the "next turn / wait" key to increment turns. Keys to
 manage windows, scroll on the map and quit the program are active; keys
-to perform player actions are inactive.
+to perform player actions are inactive. Append a number to the -s option
+(like "-s100") to start the recording at the respective turn number.
diff --git a/roguelike.c b/roguelike.c
index 5d42071..9a1849c 100644
--- a/roguelike.c
+++ b/roguelike.c
@@ -291,10 +291,14 @@ int main (int argc, char *argv[]) {
   struct World world;
   world.interactive = 1;
   int opt;
-  while ((opt = getopt(argc, argv, "s")) != -1) {
+  uint32_t start_turn;
+  while ((opt = getopt(argc, argv, "s::")) != -1) {
     switch (opt) {
       case 's':
         world.interactive = 0;
+        start_turn = 0;
+        if (optarg)
+          start_turn = atoi(optarg);
         break;
       default:
         exit(EXIT_FAILURE); } }
@@ -350,12 +354,17 @@ int main (int argc, char *argv[]) {
     unsigned char still_reading_file = 1;
     int action;
     while (1) {
-      draw_all_windows (&win_meta);
-      key = getch();
-      if (1 == still_reading_file && key == get_action_key(world.keybindings, "wait / next turn") ) {
+      if (start_turn == world.turn)
+        start_turn = 0;
+      if (0 == start_turn) {
+        draw_all_windows (&win_meta);
+        key = getch(); }
+      if (1 == still_reading_file &&
+          (world.turn < start_turn || key == get_action_key(world.keybindings, "wait / next turn")) ) {
         action = getc(file);
-        if (EOF == action)
-          still_reading_file = 0;
+        if (EOF == action) {
+          start_turn = 0;
+          still_reading_file = 0; }
         else if (0 == action)
           player_wait (&world);
         else if ('s' == action)
-- 
2.30.2