4 files changed, 16 insertions, 7 deletions
diff --git a/apps/plugins/puzzles/src/midend.c b/apps/plugins/puzzles/src/midend.c
index 2eb5ee9..6dbdd33 100644
--- a/apps/plugins/puzzles/src/midend.c
+++ b/apps/plugins/puzzles/src/midend.c
@@ -1701,7 +1701,7 @@ void midend_serialise(midend *me,
      */
     if (me->ourgame->is_timed) {
         char buf[80];
-        sprintf(buf, "%g", me->elapsed);
+        ftoa(buf, 80, me->elapsed);
         wr("TIME", buf);
     }
 
diff --git a/apps/plugins/puzzles/src/net.c b/apps/plugins/puzzles/src/net.c
index de51f82..9289afb 100644
--- a/apps/plugins/puzzles/src/net.c
+++ b/apps/plugins/puzzles/src/net.c
@@ -257,7 +257,10 @@ static char *encode_params(const game_params *params, int full)
     if (params->wrapping)
         ret[len++] = 'w';
     if (full && params->barrier_probability)
-        len += sprintf(ret+len, "b%g", params->barrier_probability);
+    {
+        len += sprintf(ret+len, "b");
+        len += ftoa(ret + len, 400, params->barrier_probability);
+    }
     if (full && !params->unique)
         ret[len++] = 'a';
     assert(len < lenof(ret));
@@ -292,7 +295,7 @@ static config_item *game_configure(const game_params *params)
 
     ret[3].name = "Barrier probability";
     ret[3].type = C_STRING;
-    sprintf(buf, "%g", params->barrier_probability);
+    ftoa(buf, 80, params->barrier_probability);
     ret[3].sval = dupstr(buf);
     ret[3].ival = 0;
 
diff --git a/apps/plugins/puzzles/src/netslide.c b/apps/plugins/puzzles/src/netslide.c
index c56e1ab..663febc 100644
--- a/apps/plugins/puzzles/src/netslide.c
+++ b/apps/plugins/puzzles/src/netslide.c
@@ -241,7 +241,10 @@ static char *encode_params(const game_params *params, int full)
     if (params->wrapping)
         ret[len++] = 'w';
     if (full && params->barrier_probability)
-        len += sprintf(ret+len, "b%g", params->barrier_probability);
+    {
+        len += sprintf(ret+len, "b");
+        len += ftoa(ret + len, 400, params->barrier_probability);
+    }
     /* Shuffle limit is part of the limited parameters, because we have to
      * provide the target move count. */
     if (params->movetarget)
@@ -278,7 +281,7 @@ static config_item *game_configure(const game_params *params)
 
     ret[3].name = "Barrier probability";
     ret[3].type = C_STRING;
-    sprintf(buf, "%g", params->barrier_probability);
+    ftoa(buf, 80, params->barrier_probability);
     ret[3].sval = dupstr(buf);
     ret[3].ival = 0;
 
diff --git a/apps/plugins/puzzles/src/rect.c b/apps/plugins/puzzles/src/rect.c
index 465e143..0c06c74 100644
--- a/apps/plugins/puzzles/src/rect.c
+++ b/apps/plugins/puzzles/src/rect.c
@@ -163,7 +163,10 @@ static char *encode_params(const game_params *params, int full)
 
     sprintf(data, "%dx%d", params->w, params->h);
     if (full && params->expandfactor)
-        sprintf(data + strlen(data), "e%g", params->expandfactor);
+    {
+        sprintf(data + strlen(data), "e");
+        ftoa(data + strlen(data), 256, params->expandfactor);
+    }
     if (full && !params->unique)
         strcat(data, "a");
 
@@ -191,7 +194,7 @@ static config_item *game_configure(const game_params *params)
 
     ret[2].name = "Expansion factor";
     ret[2].type = C_STRING;
-    sprintf(buf, "%g", params->expandfactor);
+    ftoa(buf, 80, params->expandfactor);
     ret[2].sval = dupstr(buf);
     ret[2].ival = 0;