mirror of https://github.com/cc65/cc65.git
90 lines
3.5 KiB
C
90 lines
3.5 KiB
C
/*****************************************************************************/
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/* */
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/* intstack.c */
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/* */
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/* Integer stack used for program settings */
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/* */
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/* */
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/* */
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/* (C) 2004-2010, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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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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/* common */
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#include "check.h"
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#include "intstack.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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long IS_Get (const IntStack* S)
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/* Get the value on top of an int stack */
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{
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PRECONDITION (S->Count > 0);
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return S->Stack[S->Count-1];
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}
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void IS_Set (IntStack* S, long Val)
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/* Set the value on top of an int stack */
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{
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PRECONDITION (S->Count > 0);
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S->Stack[S->Count-1] = Val;
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}
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void IS_Drop (IntStack* S)
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/* Drop a value from an int stack */
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{
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PRECONDITION (S->Count > 0);
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--S->Count;
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}
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void IS_Push (IntStack* S, long Val)
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/* Push a value onto an int stack */
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{
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PRECONDITION (S->Count < sizeof (S->Stack) / sizeof (S->Stack[0]));
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S->Stack[S->Count++] = Val;
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}
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long IS_Pop (IntStack* S)
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/* Pop a value from an int stack */
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{
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PRECONDITION (S->Count > 0);
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return S->Stack[--S->Count];
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}
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