88 lines
1.2 KiB
C++
88 lines
1.2 KiB
C++
/* Stack - a template stack class (plus some handy methods)
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*
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* Copyright 2001-2005, Axel Dörfler, axeld@pinc-software.de.
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* This file may be used under the terms of the MIT License.
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*/
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#ifndef _FSSH_STACK_H
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#define _FSSH_STACK_H
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#include "fssh_defs.h"
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#include "fssh_errors.h"
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namespace FSShell {
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template<class T> class Stack {
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public:
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Stack()
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:
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fArray(NULL),
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fUsed(0),
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fMax(0)
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{
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}
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~Stack()
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{
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free(fArray);
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}
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bool IsEmpty() const
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{
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return fUsed == 0;
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}
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void MakeEmpty()
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{
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// could also free the memory
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fUsed = 0;
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}
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fssh_status_t Push(T value)
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{
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if (fUsed >= fMax) {
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fMax += 16;
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T *newArray = (T *)realloc(fArray, fMax * sizeof(T));
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if (newArray == NULL)
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return FSSH_B_NO_MEMORY;
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fArray = newArray;
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}
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fArray[fUsed++] = value;
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return FSSH_B_OK;
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}
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bool Pop(T *value)
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{
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if (fUsed == 0)
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return false;
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*value = fArray[--fUsed];
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return true;
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}
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T *Array()
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{
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return fArray;
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}
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int32_t CountItems() const
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{
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return fUsed;
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}
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private:
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T *fArray;
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int32_t fUsed;
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int32_t fMax;
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};
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} // namespace FSShell
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using FSShell::Stack;
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#endif /* _FSSH_STACK_H */
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