From 98b8339bceb833eb2419bc349547cb8342e4be1a Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Tue, 27 Feb 2024 18:33:31 +0100
Subject: Print solutions to stderr when using -v

---
 src/alg.c      | 14 +++++++-------
 src/alg.h      |  4 ++--
 src/commands.c | 12 ++++++------
 src/solve.c    |  3 ++-
 4 files changed, 17 insertions(+), 16 deletions(-)

(limited to 'src')

diff --git a/src/alg.c b/src/alg.c
index f00453d..fbe1105 100644
--- a/src/alg.c
+++ b/src/alg.c
@@ -423,7 +423,7 @@ on_inverse(Alg *alg)
 }
 
 void
-print_alg(Alg *alg, bool l)
+print_alg(FILE *out, Alg *alg, bool l)
 {
 	char fill[4];
 	int i;
@@ -437,25 +437,25 @@ print_alg(Alg *alg, bool l)
 		if (niss == alg->inv[i])
 			strcpy(fill, i == 0 ? "" : " ");
 
-		printf("%s%s", fill, move_string(alg->move[i]));
+		fprintf(out, "%s%s", fill, move_string(alg->move[i]));
 		niss = alg->inv[i];
 	}
 
 	if (niss)
-		printf(")");
+		fprintf(out, ")");
 	if (l)
-		printf(" (%d)", alg->len);
+		fprintf(out, " (%d)", alg->len);
 
-	printf("\n");
+	fprintf(out, "\n");
 }
 
 void
-print_alglist(AlgList *al, bool l)
+print_alglist(FILE *out, AlgList *al, bool l)
 {
 	AlgListNode *i;
 
 	for (i = al->first; i != NULL; i = i->next)
-		print_alg(i->alg, l);
+		print_alg(out, i->alg, l);
 }
 
 static void
diff --git a/src/alg.h b/src/alg.h
index 7d11a7d..5eead22 100644
--- a/src/alg.h
+++ b/src/alg.h
@@ -32,8 +32,8 @@ void        moveset_to_list(Moveset ms, Move *lst);
 Alg *       new_alg(char *str);
 AlgList *   new_alglist(void);
 Alg *       on_inverse(Alg *alg);
-void        print_alg(Alg *alg, bool l);
-void        print_alglist(AlgList *al, bool l);
+void        print_alg(FILE *out, Alg *alg, bool l);
+void        print_alglist(FILE *out, AlgList *al, bool l);
 void        sort_alglist(AlgList *al);
 void        swapmove(Move *m1, Move *m2);
 Alg *       unniss(Alg *alg);
diff --git a/src/commands.c b/src/commands.c
index 1e5dd07..c65cc5f 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -435,7 +435,7 @@ solve_exec(CommandArgs *args)
 		printf("%d\n", sols->len);
 	} else {
 		sort_alglist(sols);
-		print_alglist(sols, args->opts->print_number);
+		print_alglist(stdout, sols, args->opts->print_number);
 	}
 
 	free_alglist(sols);
@@ -543,7 +543,7 @@ scramble_exec(CommandArgs *args)
 			free_alg(aux);
 			free_alg(ruf);
 		}
-		print_alg(scr, false);
+		print_alg(stdout, scr, false);
 		free_alg(scr);
 	}
 }
@@ -570,7 +570,7 @@ invert_exec(CommandArgs *args)
 	Alg *inv;
 
 	inv = inverse_alg(args->scramble);
-	print_alg(inv, false);
+	print_alg(stdout, inv, false);
 
 	free_alg(inv);
 }
@@ -645,7 +645,7 @@ twophase_exec(CommandArgs *args)
 	c = apply_alg(args->scramble, (Cube){0});
 	sol = solve_2phase(c, 1);
 
-	print_alg(sol, false);
+	print_alg(stdout, sol, false);
 	free_alg(sol);
 }
 
@@ -685,7 +685,7 @@ cleanup_exec(CommandArgs *args)
 	init_moves();
 
 	alg = cleanup(args->scramble);
-	print_alg(alg, false);
+	print_alg(stdout, alg, false);
 
 	free_alg(alg);
 }
@@ -696,7 +696,7 @@ unniss_exec(CommandArgs *args)
 	Alg *aux;
 
 	aux = unniss(args->scramble);
-	print_alg(aux, false);
+	print_alg(stdout, aux, false);
 	free(aux);
 }
 
diff --git a/src/solve.c b/src/solve.c
index 5581964..1078816 100644
--- a/src/solve.c
+++ b/src/solve.c
@@ -156,7 +156,8 @@ dfs_check_solved(DfsArg *arg)
 					inplace(unniss, arg->sols->last->alg);
 
 				if (arg->opts->verbose)
-					print_alg(arg->sols->last->alg, false);
+					print_alg(stderr,
+					    arg->sols->last->alg, false);
 			}
 
 			pthread_mutex_unlock(arg->sols_mutex);
-- 
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