ringbuffer.h

//
// Ringbuffer routines tailored to my particular needs.
// Copyright(C) 2012 Robert Sexton
//

#ifndef __STDINT_H__
#include <stdint.h>
#endif

/// If the counts are both bigger than this, we'll adjust.
#define RB_COUNT_OVERFLOW 0x40000000

typedef struct {
    uint32_t iWrite;
    uint32_t iRead;

    uint32_t Dropped;    /// Record dropped characters
    uint32_t ResetCount; /// How many times we

    uint8_t* Buf; // Pointer to the storage area.
    uint32_t BufSize;  // Length of the storage area
    uint32_t BufMask;  // Used for masking the index.
    } RINGBUF;

void ringbuffer_init(RINGBUF*, uint8_t*, int);
uint32_t ringbuffer_used(RINGBUF*);
uint32_t ringbuffer_free(RINGBUF*);

int32_t ringbuffer_addchar(RINGBUF*, uint8_t);
int ringbuffer_getchar(RINGBUF*);

uint8_t *ringbuffer_getbulkpointer(RINGBUF*);
int32_t ringbuffer_getbulkcount(RINGBUF*);
void    ringbuffer_bulkremove(RINGBUF*, int count);

int  ringbuffer_reset_count(RINGBUF*);