From 39a5ef697479b56db0ac69ef00e0735e51f6150a Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano.tronto@gmail.com>
Date: Mon, 27 Jul 2020 15:55:46 +0200
Subject: added command clear

---
 docs/clear.txt |   9 +++++++++
 docs/pre.txt   |  18 ------------------
 nissy          | Bin 171912 -> 521128 bytes
 src/main.c     |  12 +++++++++++-
 4 files changed, 20 insertions(+), 19 deletions(-)
 create mode 100644 docs/clear.txt
 delete mode 100644 docs/pre.txt

diff --git a/docs/clear.txt b/docs/clear.txt
new file mode 100644
index 0000000..8ba961a
--- /dev/null
+++ b/docs/clear.txt
@@ -0,0 +1,9 @@
+
+HELP PAGE FOR COMMAND clear
+
+SYNTAX
+clear
+
+DESCRIPTION
+Resets all saved scrambles and output sequences.
+
diff --git a/docs/pre.txt b/docs/pre.txt
deleted file mode 100644
index c2cfd96..0000000
--- a/docs/pre.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-
-HELP PAGE FOR COMMAND pre
-
-SYNTAX
-pre [MOVES|$ID1|@ID1] $ID2
-
-DESCRIPTION
-Prepends either MOVES, the scramble memorized under $ID1 or the output sequence
-memorized under @ID1 at the beginning of the scramble memorized under $ID2. If
-none of MOVES, $ID1 or @ID1 is specified, the user will be asked to type the
-moves.
-Menmonic: "pre(pend) x to y" or just "pre(pend) to y".
-
-EXAMPLES
-add $1
-  The user is required to type the moves that will be prepended to $1.
-add F R B $1
-  Prepends the moves F R B to scramble $1. Now scramble $1 begins with F R B.
diff --git a/nissy b/nissy
index d471eb7..d0ed5f5 100755
Binary files a/nissy and b/nissy differ
diff --git a/src/main.c b/src/main.c
index d68f4af..9758a2f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -32,6 +32,8 @@ char *commands[][10] = {
    "Solves a scramble."},
   {"replace", "[MOVES|$ID|@ID]",
    "Find non-optimal subsequences."},
+  {"clear", "",
+   "Delete saved scrambles and output sequences."},
   {"eo", "[MOVES|$ID|@ID]",
    "Solves EO."},
   {"dr", "[MOVES|$ID|@ID]",
@@ -459,6 +461,14 @@ void replace_cmd(int n, char cmdtok[][100]) {
   }
 }     
 
+void clear_cmd(int n, char cmdtok[][100]) {
+  if (n > 1 || cmdtok[0][0] != 'c') {  /* Avoid unused variable warning */
+    printf("clear: syntax error.\n");
+    return;
+  }
+  scr_count = tmp_count = 1;
+}
+
 void eo_cmd(int n, char cmdtok[][100]) {
   
   /* Default values */
@@ -818,7 +828,7 @@ void exit_quit_cmd(int n, char cmdtok[][100]) {
 void (*cmd_list[])(int n, char cmdtok[][100]) = {
   help_cmd, scramble_cmd, save_cmd, change_cmd, print_cmd,
   add_cmd, invert_cmd, unniss_cmd, pic_cmd,
-  solve_cmd, replace_cmd,
+  solve_cmd, replace_cmd, clear_cmd,
   eo_cmd, dr_cmd, htr_cmd,
   drfinish_cmd, htrfinish_cmd, drcorners_cmd,
   exit_quit_cmd, exit_quit_cmd, NULL
-- 
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