--- /dev/null
+/*****************************************************************************/
+/* */
+/* intstack.c */
+/* */
+/* Integer stack used for program settings */
+/* */
+/* */
+/* */
+/* (C) 2004 Ullrich von Bassewitz */
+/* Römerstraße 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* 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. */
+/* */
+/*****************************************************************************/
+
+
+
+/* common */
+#include "check.h"
+#include "intstack.h"
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+long IS_Get (const IntStack* S)
+/* Get the value on top of an int stack */
+{
+ CHECK (S->Count > 0);
+ return S->Stack[S->Count-1];
+}
+
+
+
+void IS_Set (IntStack* S, long Val)
+/* Set the value on top of an int stack */
+{
+ CHECK (S->Count > 0);
+ S->Stack[S->Count-1] = Val;
+}
+
+
+
+long IS_Pop (IntStack* S)
+/* Pop a value from an int stack */
+{
+ CHECK (S->Count > 1);
+ return S->Stack[--S->Count];
+}
+
+
+
+void IS_Push (IntStack* S, long Val)
+/* Push a value onto an int stack */
+{
+ CHECK (S->Count < sizeof (S->Stack) / sizeof (S->Stack[0]));
+ S->Stack[S->Count++] = Val;
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* intstack.h */
+/* */
+/* Integer stack used for program settings */
+/* */
+/* */
+/* */
+/* (C) 2004 Ullrich von Bassewitz */
+/* Römerstraße 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
+/* */
+/* */
+/* 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 INTSTACK_H
+#define INTSTACK_H
+
+
+
+#include "inline.h"
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+typedef struct IntStack IntStack;
+struct IntStack {
+ unsigned Count;
+ long Stack[8];
+};
+
+/* Declare an int stack with the given value as first element */
+#define INTSTACK(Val) { 1, { Val, 0, 0, 0, 0, 0, 0, 0 } }
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+#if defined(HAVE_INLINE)
+INLINE int IS_IsFull (const IntStack* S)
+/* Return true if there is no space left on the given int stack */
+{
+ return (S->Count >= sizeof (S->Stack) / sizeof (S->Stack[0]));
+}
+#else
+# define IS_IsFull(S) ((S)->Count >= sizeof ((S)->Stack) / sizeof ((S)->Stack[0]))
+#endif
+
+#if defined(HAVE_INLINE)
+INLINE unsigned IS_GetCount (const IntStack* S)
+/* Return the number of elements on the given int stack */
+{
+ return S->Count;
+}
+#else
+# define IS_GetCount(S) (S)->Count
+#endif
+
+long IS_Get (const IntStack* S);
+/* Get the value on top of an int stack */
+
+void IS_Set (IntStack* S, long Val);
+/* Set the value on top of an int stack */
+
+long IS_Pop (IntStack* S);
+/* Pop a value from an int stack */
+
+void IS_Push (IntStack* S, long Val);
+/* Push a value onto an int stack */
+
+
+
+/* End of intstack.h */
+#endif
+
+
+
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