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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>
*
* SPDX-FileCopyrightText: 2024 Hiredict Contributors
* SPDX-FileCopyrightText: 2024 Salvatore Sanfilippo <antirez at gmail dot com>
* SPDX-FileCopyrightText: 2024 Pieter Noordhuis <pcnoordhuis at gmail dot com>
*
* SPDX-License-Identifier: BSD-3-Clause
* SPDX-License-Identifier: LGPL-3.0-or-later
*
*/
#ifndef __HIREDICT_READ_H
#define __HIREDICT_READ_H
#include <stdio.h> /* for size_t */
#define REDICT_ERR -1
#define REDICT_OK 0
/* When an error occurs, the err flag in a context is set to hold the type of
* error that occurred. REDICT_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 REDICT_ERR_IO 1 /* Error in read or write */
#define REDICT_ERR_EOF 3 /* End of file */
#define REDICT_ERR_PROTOCOL 4 /* Protocol error */
#define REDICT_ERR_OOM 5 /* Out of memory */
#define REDICT_ERR_TIMEOUT 6 /* Timed out */
#define REDICT_ERR_OTHER 2 /* Everything else... */
#define REDICT_REPLY_STRING 1
#define REDICT_REPLY_ARRAY 2
#define REDICT_REPLY_INTEGER 3
#define REDICT_REPLY_NIL 4
#define REDICT_REPLY_STATUS 5
#define REDICT_REPLY_ERROR 6
#define REDICT_REPLY_DOUBLE 7
#define REDICT_REPLY_BOOL 8
#define REDICT_REPLY_MAP 9
#define REDICT_REPLY_SET 10
#define REDICT_REPLY_ATTR 11
#define REDICT_REPLY_PUSH 12
#define REDICT_REPLY_BIGNUM 13
#define REDICT_REPLY_VERB 14
/* Default max unused reader buffer. */
#define REDICT_READER_MAX_BUF (1024*16)
/* Default multi-bulk element limit */
#define REDICT_READER_MAX_ARRAY_ELEMENTS ((1LL<<32) - 1)
#ifdef __cplusplus
extern "C" {
#endif
typedef struct redictReadTask {
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 redictReadTask *parent; /* parent task */
void *privdata; /* user-settable arbitrary field */
} redictReadTask;
typedef struct redictReplyObjectFunctions {
void *(*createString)(const redictReadTask*, char*, size_t);
void *(*createArray)(const redictReadTask*, size_t);
void *(*createInteger)(const redictReadTask*, long long);
void *(*createDouble)(const redictReadTask*, double, char*, size_t);
void *(*createNil)(const redictReadTask*);
void *(*createBool)(const redictReadTask*, int);
void (*freeObject)(void*);
} redictReplyObjectFunctions;
typedef struct redictReader {
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 */
redictReadTask **task;
int tasks;
int ridx; /* Index of current read task */
void *reply; /* Temporary reply pointer */
redictReplyObjectFunctions *fn;
void *privdata;
} redictReader;
/* Public API for the protocol parser. */
redictReader *redictReaderCreateWithFunctions(redictReplyObjectFunctions *fn);
void redictReaderFree(redictReader *r);
int redictReaderFeed(redictReader *r, const char *buf, size_t len);
int redictReaderGetReply(redictReader *r, void **reply);
#define redictReaderSetPrivdata(_r, _p) (int)(((redictReader*)(_r))->privdata = (_p))
#define redictReaderGetObject(_r) (((redictReader*)(_r))->reply)
#define redictReaderGetError(_r) (((redictReader*)(_r))->errstr)
#ifdef __cplusplus
}
#endif
#endif
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