3 files changed, 42 insertions, 40 deletions

diff --git a/pieces.c b/pieces.c
index 95c9923..6199863 100644
--- a/pieces.c
+++ b/pieces.c
@@ -1,5 +1,5 @@
 #include <stdlib.h>
-#include <stdio.h>
+#include <stdbool.h>
 #include <string.h>
 #include "pieces.h"
 
@@ -73,3 +73,40 @@ struct piece* randpiece() {
     return pc;
 }
 
+void refillpieces(struct piece** hand, int nhand) {
+    // randomly select `nhand` pieces to `hand`
+    for (int i = 0; i < nhand; i++) {
+        hand[i] = randpiece();
+    }
+}
+
+bool placeable(char** map, struct piece* pc, int row, int col, int mapH, int mapW) {
+    // boundary check
+    if (row < 0 || row + (pc->h) > mapH || col < 0 || col + (pc->w) > mapW)
+        return false;
+
+    // check if blocks to be taken by `pc` are vacant
+    for (int r = 0; r < pc->h; r++) {
+        for (int c = 0; c < pc->w; c++) {
+            if (map[row + r][col + c] == '+' && pc->blocks[r * pc->w + c] == '+')
+                return false;
+        }
+    }
+
+    return true;
+}
+
+void place(char** map, struct piece* pc, int row, int col) {
+    for (int r = 0; r < pc->h; r++) {
+        for (int c = 0; c < pc->w; c++) {
+            if (pc->blocks[r * (pc->w) + c] == '+')
+                map[row + r][col + c] = '+';
+        }
+    }
+}
+
+void freepiece(struct piece* pc) {
+    free(pc->blocks);
+    free(pc);
+}
+
diff --git a/pieces.h b/pieces.h
index ee2e371..c0d5eaa 100644
--- a/pieces.h
+++ b/pieces.h
@@ -7,5 +7,9 @@ struct piece {
 };
 
 struct piece* randpiece();
+void refillpieces(struct piece** hand, int nhand);
+bool placeable(char** map, struct piece* pc, int row, int col, int mapH, int mapW);
+void place(char** map, struct piece* pc, int row, int col);
+void freepiece(struct piece* pc);
 #endif
 
diff --git a/sirtet.c b/sirtet.c
index c9221ce..1cbe475 100644
--- a/sirtet.c
+++ b/sirtet.c
@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include <stdio.h>
 #include <stdbool.h>
 #include <time.h>
 #include <locale.h>
@@ -53,44 +52,6 @@ void clearfull(char** map, int mapH, int mapW) {
     free(cols_to_clear);
 }
 
-bool placeable(char** map, struct piece* pc, int row, int col, int mapH, int mapW) {
-    // boundary check
-    if (row < 0 || row + (pc->h) > mapH || col < 0 || col + (pc->w) > mapW)
-        return false;
-
-    // check if blocks to be taken by `pc` are vacant
-    for (int r = 0; r < pc->h; r++) {
-        for (int c = 0; c < pc->w; c++) {
-            if (map[row + r][col + c] == '+' && pc->blocks[r * pc->w + c] == '+')
-                return false;
-        }
-    }
-
-    return true;
-}
-
-void place(char** map, struct piece* pc, int row, int col) {
-    for (int r = 0; r < pc->h; r++) {
-        for (int c = 0; c < pc->w; c++) {
-            if (pc->blocks[r * (pc->w) + c] == '+')
-                map[row + r][col + c] = '+';
-        }
-    }
-}
-
-void freepiece(struct piece* pc) {
-    free(pc->blocks);
-    free(pc);
-}
-
-void refillpieces(struct piece** hand, int nhand) {
-    // randomly select `no` pieces from `pool` to `hand`
-    // capacities of `hand` and `pool` are `nhand` and `npool` resp.
-    for (int i = 0; i < nhand; i++) {
-        hand[i] = randpiece();
-    }
-}
-
 void sirtet() {
     const int H = 8; // canvas height
     const int W = 8; // canvas width