From 8cec37cb3e490b06639f2e05df8b947a9333d5d2 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano.tronto@gmail.com>
Date: Sun, 26 Dec 2021 22:42:37 +0100
Subject: Added scramble command

---
 src/commands.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 92 insertions(+), 15 deletions(-)

(limited to 'src/commands.c')

diff --git a/src/commands.c b/src/commands.c
index 02af19f..fc63e7c 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -8,12 +8,14 @@ CommandArgs *           print_parse_args(int c, char **v);
 CommandArgs *           parse_only_scramble(int c, char **v);
 CommandArgs *           parse_no_arg(int c, char **v);
 CommandArgs *           solve_parse_args(int c, char **v);
+CommandArgs *           scramble_parse_args(int c, char **v);
 
 /* Exec functions ************************************************************/
 
 static void             gen_exec(CommandArgs *args);
 static void             invert_exec(CommandArgs *args);
 static void             solve_exec(CommandArgs *args);
+static void             scramble_exec(CommandArgs *args);
 static void             steps_exec(CommandArgs *args);
 static void             commands_exec(CommandArgs *args);
 static void             print_exec(CommandArgs *args);
@@ -26,6 +28,7 @@ static void             version_exec(CommandArgs *args);
 /* Local functions ***********************************************************/
 
 static bool             read_step(CommandArgs *args, char *str);
+static bool             read_scrtype(CommandArgs *args, char *str);
 static bool             read_scramble(int c, char **v, CommandArgs *args);
 
 /* Commands ******************************************************************/
@@ -39,6 +42,15 @@ solve_cmd = {
 	.exec        = solve_exec
 };
 
+Command
+scramble_cmd = {
+	.name        = "scramble",
+	.usage       = "scramble [TYPE] [-n N]",
+	.description = "Get a random-position scramble",
+	.parse_args  = scramble_parse_args,
+	.exec        = scramble_exec,
+};
+
 Command
 gen_cmd = {
 	.name        = "gen",
@@ -137,6 +149,7 @@ Command *commands[NCOMMANDS] = {
 	&print_cmd,
 	&quit_cmd,
 	&solve_cmd,
+	&scramble_cmd,
 	&steps_cmd,
 	&twophase_cmd,
 	&unniss_cmd,
@@ -242,6 +255,37 @@ solve_parse_args(int c, char **v)
 	return a;
 }
 
+CommandArgs *
+scramble_parse_args(int c, char **v)
+{
+	int i;
+	long val;
+
+	CommandArgs *a = new_args();
+
+	a->success = true;
+	a->n       = 1;
+	a->scrt    = -1;
+
+	for (i = 0; i < c; i++) {
+		if (!strcmp(v[i], "-n") && i+1 < c) {
+			val = strtol(v[++i], NULL, 10);
+			if (val < 1 || val > 1000000) {
+				fprintf(stderr,
+					"Invalid number of scrambles.\n");
+				a->success = false;
+				return a;
+			}
+			a->n = val;
+		} else if (!read_scrtype(a, v[i])) {
+			a->success = false;
+			return a;
+		}
+	}
+
+	return a;
+}
+
 CommandArgs *
 gen_parse_args(int c, char **v)
 {
@@ -341,6 +385,26 @@ solve_exec(CommandArgs *args)
 	free_alglist(sols);
 }
 
+static void
+scramble_exec(CommandArgs *args)
+{
+	Cube cube;
+	Alg *scr;
+	int i;
+
+	init_movesets();
+	init_symcoord();
+
+	srand(time(NULL));
+
+	for (i = 0; i < args->n; i++) {
+		cube = random_cube(args->scrt);
+		scr = solve_2phase(cube, 1);
+		print_alg(scr, false);
+		free_alg(scr);
+	}
+}
+
 static void
 gen_exec(CommandArgs *args)
 {
@@ -453,21 +517,6 @@ version_exec(CommandArgs *args)
 
 /* Local functions implementation ********************************************/
 
-static bool
-read_step(CommandArgs *args, char *str)
-{
-	int i;
-
-	for (i = 0; i < NSTEPS; i++) {
-		if (steps[i] != NULL && !strcmp(steps[i]->shortname, str)) {
-			args->step = steps[i];
-			return true;
-		}
-	}
-
-	return false;
-}
-
 static bool
 read_scramble(int c, char **v, CommandArgs *args)
 {
@@ -510,6 +559,34 @@ read_scramble(int c, char **v, CommandArgs *args)
 	return args->scramble->len > 0;
 }
 
+static bool
+read_scrtype(CommandArgs *args, char *str)
+{
+	int i;
+
+	args->scrt = -1;
+	for (i = 0; i < NSCRTYPES; i++)
+		if (!strcmp(scrtypes[i], str))
+			args->scrt = i;
+
+	return args->scrt != -1;
+}
+
+static bool
+read_step(CommandArgs *args, char *str)
+{
+	int i;
+
+	for (i = 0; i < NSTEPS; i++) {
+		if (steps[i] != NULL && !strcmp(steps[i]->shortname, str)) {
+			args->step = steps[i];
+			return true;
+		}
+	}
+
+	return false;
+}
+
 /* Public functions implementation *******************************************/
 
 void
-- 
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