Trampoline stack

diff --git a/src/cc65/trampoline.c b/src/cc65/trampoline.c
new file mode 100644 (file)
index 0000000..1f35a0f
--- /dev/null
+++ b/src/cc65/trampoline.c
@@ -0,0 +1,102 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                trampoline.c                               */
+/*                                                                           */
+/*                          Trampoline management                            */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2017, Mega Cat Studios                                                */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#include <stdarg.h>
+#include <string.h>
+
+/* common */
+#include "chartype.h"
+#include "check.h"
+#include "coll.h"
+#include "scanner.h"
+#include "intptrstack.h"
+#include "xmalloc.h"
+
+/* cc65 */
+#include "codeent.h"
+#include "error.h"
+#include "trampoline.h"
+
+
+
+/*****************************************************************************/
+/*                                   Data                                    */
+/*****************************************************************************/
+
+
+/* Trampolines */
+static IntPtrStack Trampolines;
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void PushTrampoline (void *Ptr, unsigned char Val)
+/* Push the current trampoline */
+{
+    if (IPS_IsFull (&Trampolines)) {
+        Error ("Trampoline stack overflow");
+    } else {
+        IPS_Push (&Trampolines, Val, Ptr);
+    }
+}
+
+
+
+void PopTrampoline (void)
+/* Remove the current trampoline */
+{
+    if (IPS_GetCount (&Trampolines) < 1) {
+        Error ("Trampoline stack is empty");
+    } else {
+        IPS_Drop (&Trampolines);
+    }
+}
+
+
+
+void GetTrampoline (void **Ptr, unsigned char *Val)
+/* Get the current trampoline */
+{
+    if (IPS_GetCount (&Trampolines) < 1) {
+        *Ptr = NULL;
+        *Val = 0;
+    } else {
+        long Temp;
+        IPS_Get (&Trampolines, &Temp, Ptr);
+        *Val = Temp;
+    }
+}

diff --git a/src/cc65/trampoline.h b/src/cc65/trampoline.h
new file mode 100644 (file)
index 0000000..f110bd4
--- /dev/null
+++ b/src/cc65/trampoline.h
@@ -0,0 +1,65 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                trampoline.h                               */
+/*                                                                           */
+/*                            Trampoline management                          */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2017, Mega Cat Studios                                                */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#ifndef TRAMPOLINE_H
+#define TRAMPOLINE_H
+
+
+
+#include <stdio.h>
+
+/* common */
+#include "attrib.h"
+
+/* cc65 */
+#include "opcodes.h"
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void PushTrampoline (void *Ptr, unsigned char Val);
+/* Push the current trampoline */
+
+void PopTrampoline (void);
+/* Pop the current trampoline */
+
+void GetTrampoline (void **Ptr, unsigned char *Val);
+/* Get the current trampoline, if any */
+
+
+/* End of trampoline.h */
+
+#endif