src/rio.h

   1 #ifndef __REDIS_RIO_H
   2 #define __REDIS_RIO_H
   3
   4 #include <stdio.h>
   5 #include "sds.h"
   6
   7 struct _rio {
   8     /* Backend functions.
   9      * Since this functions do not tolerate short writes or reads the return
  10      * value is simplified to: zero on error, non zero on complete success. */
  11     size_t (*read)(struct _rio *, void *buf, size_t len);
  12     size_t (*write)(struct _rio *, const void *buf, size_t len);
  13     off_t (*tell)(struct _rio *);
  14
  15     /* Backend-specific vars. */
  16     union {
  17         struct {
  18             sds ptr;
  19             off_t pos;
  20         } buffer;
  21         struct {
  22             FILE *fp;
  23         } file;
  24     } io;
  25 };
  26
  27 typedef struct _rio rio;
  28
  29 #define rioWrite(rio,buf,len) ((rio)->write((rio),(buf),(len)))
  30 #define rioRead(rio,buf,len) ((rio)->read((rio),(buf),(len)))
  31
  32 void rioInitWithFile(rio *r, FILE *fp);
  33 void rioInitWithBuffer(rio *r, sds s);
  34
  35 size_t rioWriteBulkCount(rio *r, char prefix, int count);
  36 size_t rioWriteBulkString(rio *r, const char *buf, size_t len);
  37 size_t rioWriteBulkLongLong(rio *r, long long l);
  38 size_t rioWriteBulkDouble(rio *r, double d);
  39
  40 #endif