Updated rasm to 1.7

1 files changed, 75 insertions, 0 deletions

diff --git a/tools/rasm/ZX0-main/src/memory.c b/tools/rasm/ZX0-main/src/memory.c
new file mode 100644
index 0000000..be52c3a
--- /dev/null
+++ b/tools/rasm/ZX0-main/src/memory.c
@@ -0,0 +1,75 @@
+/*
+ * (c) Copyright 2021 by Einar Saukas. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * The name of its author may not be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "zx0.h"
+
+#define QTY_BLOCKS 10000
+
+BLOCK *ghost_root = NULL;
+BLOCK *dead_array = NULL;
+int dead_array_size = 0;
+
+BLOCK *allocate(int bits, int index, int offset, BLOCK *chain) {
+    BLOCK *ptr;
+
+    if (ghost_root) {
+        ptr = ghost_root;
+        ghost_root = ptr->ghost_chain;
+        if (ptr->chain && !--ptr->chain->references) {
+            ptr->chain->ghost_chain = ghost_root;
+            ghost_root = ptr->chain;
+        }
+    } else {
+        if (!dead_array_size) {
+            dead_array = (BLOCK *)malloc(QTY_BLOCKS*sizeof(BLOCK));
+            if (!dead_array) {
+                fprintf(stderr, "Error: Insufficient memory\n");
+                exit(1);
+            }
+            dead_array_size = QTY_BLOCKS;
+        }
+        ptr = &dead_array[--dead_array_size];
+    }
+    ptr->bits = bits;
+    ptr->index = index;
+    ptr->offset = offset;
+    if (chain)
+        chain->references++;
+    ptr->chain = chain;
+    ptr->references = 0;
+    return ptr;
+}
+
+void assign(BLOCK **ptr, BLOCK *chain) {
+    chain->references++;
+    if (*ptr && !--(*ptr)->references) {
+        (*ptr)->ghost_chain = ghost_root;
+        ghost_root = *ptr;
+    }
+    *ptr = chain;
+}