53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
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#pragma once
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#include "../main.h"
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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void * data; // the data buffer
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uintptr_t size; // size of data buffer
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void * top; // top of the stack, the stack grows downward (from data+size to data)
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} stack;
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// initialize a stack with a existing buffer
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void stack_InitBuffered(stack *s, void *buffer, uintptr_t size);
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// pushes one byte to the stack, discarding if full
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void stack_PushByte(stack *s, const uint8_t b);
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// pops one byte from the top of the stack, returning it
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uint8_t stack_PopByte(stack *s);
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// pushes Size bytes to the stack, none written if there is not space for all the bytes
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void stack_Push(stack *s, const void *buffer, uintptr_t size);
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// pops Size bytes from the stack, none popped if there are no enough data
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// returns the number of bytes popped (either Size or 0)
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uintptr_t stack_Pop(stack *s, void *buffer, uintptr_t size);
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// return the byte at the top of the stack
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uint8_t stack_TopByte(stack *s);
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// copy the bytes at the top of the stack
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// returns the number of bytes copied
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uintptr_t stack_Top(stack *s, void *buffer, uintptr_t size);
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// tells if the stack is empty
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bool stack_Empty(stack *s);
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// returns the number of bytes in the stack
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uintptr_t stack_Size(stack *s);
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// returns the empty space left in the stack
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uintptr_t stack_Space(stack *s);
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#ifdef __cplusplus
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}
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#endif
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