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read.h
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/* * Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com> * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com> * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of Redis nor the names of its contributors may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef __HIREDIS_READ_H #define __HIREDIS_READ_H #include <stdio.h> /* for size_t */ #define REDIS_ERR -1 #define REDIS_OK 0 /* When an error occurs, the err flag in a context is set to hold the type of * error that occurred. REDIS_ERR_IO means there was an I/O error and you * should use the "errno" variable to find out what is wrong. * For other values, the "errstr" field will hold a description. */ #define REDIS_ERR_IO 1 /* Error in read or write */ #define REDIS_ERR_EOF 3 /* End of file */ #define REDIS_ERR_PROTOCOL 4 /* Protocol error */ #define REDIS_ERR_OOM 5 /* Out of memory */ #define REDIS_ERR_TIMEOUT 6 /* Timed out */ #define REDIS_ERR_OTHER 2 /* Everything else... */ #define REDIS_REPLY_STRING 1 #define REDIS_REPLY_ARRAY 2 #define REDIS_REPLY_INTEGER 3 #define REDIS_REPLY_NIL 4 #define REDIS_REPLY_STATUS 5 #define REDIS_REPLY_ERROR 6 #define REDIS_REPLY_DOUBLE 7 #define REDIS_REPLY_BOOL 8 #define REDIS_REPLY_MAP 9 #define REDIS_REPLY_SET 10 #define REDIS_REPLY_ATTR 11 #define REDIS_REPLY_PUSH 12 #define REDIS_REPLY_BIGNUM 13 #define REDIS_REPLY_VERB 14 /* Default max unused reader buffer. */ #define REDIS_READER_MAX_BUF (1024*16) /* Default multi-bulk element limit */ #define REDIS_READER_MAX_ARRAY_ELEMENTS ((1LL<<32) - 1) #ifdef __cplusplus extern "C" { #endif typedef struct redisReadTask { int type; long long elements; /* number of elements in multibulk container */ int idx; /* index in parent (array) object */ void *obj; /* holds user-generated value for a read task */ struct redisReadTask *parent; /* parent task */ void *privdata; /* user-settable arbitrary field */ } redisReadTask; typedef struct redisReplyObjectFunctions { void *(*createString)(const redisReadTask*, char*, size_t); void *(*createArray)(const redisReadTask*, size_t); void *(*createInteger)(const redisReadTask*, long long); void *(*createDouble)(const redisReadTask*, double, char*, size_t); void *(*createNil)(const redisReadTask*); void *(*createBool)(const redisReadTask*, int); void (*freeObject)(void*); } redisReplyObjectFunctions; typedef struct redisReader { int err; /* Error flags, 0 when there is no error */ char errstr[128]; /* String representation of error when applicable */ char *buf; /* Read buffer */ size_t pos; /* Buffer cursor */ size_t len; /* Buffer length */ size_t maxbuf; /* Max length of unused buffer */ long long maxelements; /* Max multi-bulk elements */ redisReadTask **task; int tasks; int ridx; /* Index of current read task */ void *reply; /* Temporary reply pointer */ redisReplyObjectFunctions *fn; void *privdata; } redisReader; /* Public API for the protocol parser. */ redisReader *redisReaderCreateWithFunctions(redisReplyObjectFunctions *fn); void redisReaderFree(redisReader *r); int redisReaderFeed(redisReader *r, const char *buf, size_t len); int redisReaderGetReply(redisReader *r, void **reply); #define redisReaderSetPrivdata(_r, _p) (int)(((redisReader*)(_r))->privdata = (_p)) #define redisReaderGetObject(_r) (((redisReader*)(_r))->reply) #define redisReaderGetError(_r) (((redisReader*)(_r))->errstr) #ifdef __cplusplus } #endif #endif