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112 lines
4.5 KiB
C
112 lines
4.5 KiB
C
/*****************************************************************************/
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/* */
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/* intptrstack.h */
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/* */
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/* Integer+ptr stack used for program settings */
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/* */
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/* */
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/* */
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/* (C) 2017, Mega Cat Studios */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef INTPTRSTACK_H
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#define INTPTRSTACK_H
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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typedef struct IntPtrStack IntPtrStack;
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struct IntPtrInner {
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long val;
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void *ptr;
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};
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struct IntPtrStack {
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unsigned Count;
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struct IntPtrInner Stack[8];
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};
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/* An initializer for an empty int stack */
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#define STATIC_INTPTRSTACK_INITIALIZER { \
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0, \
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{ 0, 0 }, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0} } \
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}
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/* Declare an int stack with the given value as first element */
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#define INTPTRSTACK(Val, Ptr) { \
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1, \
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{ {Val, Ptr}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0} } \
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}
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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static inline int IPS_IsFull (const IntPtrStack* S)
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/* Return true if there is no space left on the given int stack */
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{
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return (S->Count >= sizeof (S->Stack) / sizeof (S->Stack[0]));
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}
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static inline int IPS_IsEmpty (const IntPtrStack* S)
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/* Return true if there are no values on the given int stack */
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{
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return (S->Count == 0);
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}
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static inline unsigned IPS_GetCount (const IntPtrStack* S)
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/* Return the number of elements on the given int stack */
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{
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return S->Count;
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}
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void IPS_Get (const IntPtrStack* S, long *Val, void **Ptr);
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/* Get the value on top of an int stack */
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void IPS_Set (IntPtrStack* S, long Val, void *Ptr);
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/* Set the value on top of an int stack */
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void IPS_Drop (IntPtrStack* S);
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/* Drop a value from an int stack */
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void IPS_Push (IntPtrStack* S, long Val, void *Ptr);
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/* Push a value onto an int stack */
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void IPS_Pop (IntPtrStack* S, long *Val, void **Ptr);
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/* Pop a value from an int stack */
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/* End of IntPtrStack.h */
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#endif
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