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/** Size of buffer for pressed keys */
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/** Size of buffer for pressed keys */
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#define KEYBUFFER_SIZE 128
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#define KEYBUFFER_SIZE 128
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typedef struct {
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typedef struct {
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    char fifo[KEYBUFFER_SIZE];
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    int fifo[KEYBUFFER_SIZE];
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    unsigned long head;
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    unsigned long head;
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    unsigned long tail;
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    unsigned long tail;
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    unsigned long items;
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    unsigned long items;
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} keybuffer_t;
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} keybuffer_t;
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void keybuffer_free(keybuffer_t *keybuffer);
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void keybuffer_free(keybuffer_t *keybuffer);
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void keybuffer_init(keybuffer_t *keybuffer);
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void keybuffer_init(keybuffer_t *keybuffer);
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int keybuffer_available(keybuffer_t *keybuffer);
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int keybuffer_available(keybuffer_t *keybuffer);
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int keybuffer_empty(keybuffer_t *keybuffer);
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int keybuffer_empty(keybuffer_t *keybuffer);
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void keybuffer_push(keybuffer_t *keybuffer, char key);
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void keybuffer_push(keybuffer_t *keybuffer, int key);
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int keybuffer_pop(keybuffer_t *keybuffer, char *c);
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int keybuffer_pop(keybuffer_t *keybuffer, int *c);
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#endif
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#endif
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