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@@ -20,42 +20,49 @@
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#include "queue.h"
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QUEUE *alloc_queue( int size)
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{ QUEUE *retval;
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retval = (QUEUE *) malloc( sizeof( QUEUE) + (size_t) size);
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if ( (QUEUE *) 0 != retval)
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{ retval->size = size;
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retval->head = 0;
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retval->tail = 0;
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retval->avail = size;
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retval->buffer = ( (char *) retval) + sizeof( QUEUE);
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}
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return retval;
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QUEUE *alloc_queue(
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int size)
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{
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QUEUE *retval;
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retval = (QUEUE *) malloc(sizeof(QUEUE) + (size_t) size);
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if ((QUEUE *) 0 != retval) {
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retval->size = size;
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retval->head = 0;
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retval->tail = 0;
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retval->avail = size;
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retval->buffer = ((char *) retval) + sizeof(QUEUE);
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}
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return retval;
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}
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int en_queue( QUEUE *queue, char data)
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{ int retval = -1;
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if ( 0 != queue->avail)
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{ *( queue->buffer + queue->head) = data;
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queue->head += 1;
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if ( queue->head == queue->size)
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queue->head = 0;
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queue->avail -= 1;
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retval = queue->avail;
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}
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return retval;
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int en_queue(
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QUEUE * queue,
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char data)
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{
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int retval = -1;
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if (0 != queue->avail) {
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*(queue->buffer + queue->head) = data;
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queue->head += 1;
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if (queue->head == queue->size)
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queue->head = 0;
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queue->avail -= 1;
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retval = queue->avail;
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}
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return retval;
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}
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int de_queue( QUEUE *queue)
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{ int retval = -1;
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if ( queue->avail != queue->size)
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{ retval = *( queue->buffer + queue->tail);
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queue->tail += 1;
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if ( queue->tail == queue->size)
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queue->tail = 0;
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queue->avail += 1;
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}
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return retval;
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int de_queue(
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QUEUE * queue)
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{
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int retval = -1;
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if (queue->avail != queue->size) {
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retval = *(queue->buffer + queue->tail);
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queue->tail += 1;
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if (queue->tail == queue->size)
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queue->tail = 0;
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queue->avail += 1;
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}
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return retval;
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}
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/* End of Queue.c */
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