Add fen loader and a test script for c

engine/src/test.c

@@ -0,0 +1,33 @@
+/**
+    A quick test script to debug and visually inspect functions
+    and operations.
+*/
+
+
+#include <stdio.h>
+#include <string.h>
+#include "bitboard.h"
+#include "fen.h"
+
+
+static int popcount64(uint64_t x){ int c=0; while(x){ x&=x-1; ++c; } return c; }
+static const char NAME[12] = {'P','N','B','R','Q','K','p','n','b','r','q','k'};
+
+
+int main(void) {
+    const char *fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
+
+    struct Board b;
+
+    int rc = load_fen(&b, fen);
+
+    for (int i=0;i<12;i++) printf("%c: %d\n", NAME[i], popcount64(b.pieces[i]));
+
+    if (rc != 0) {
+        fprintf(stderr, "load_fen failed (rc=%d) for FEN:\n%s\n", rc, fen);
+        return 1;
+    }
+
+    print_board(&b);
+    return 0;
+}