/*
* Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <unistd.h>
#include <assert.h>
#include <errno.h>
+#include <ctype.h>
#include "hiredis.h"
#include "net.h"
void *reply; /* holds temporary reply */
sds buf; /* read buffer */
- unsigned int pos; /* buffer cursor */
+ size_t pos; /* buffer cursor */
+ size_t len; /* buffer length */
- redisReadTask rstack[3]; /* stack of read tasks */
+ redisReadTask rstack[9]; /* stack of read tasks */
int ridx; /* index of stack */
+ void *privdata; /* user-settable arbitrary field */
} redisReader;
static redisReply *createReplyObject(int type);
/* Create a reply object */
static redisReply *createReplyObject(int type) {
- redisReply *r = calloc(sizeof(*r),1);
+ redisReply *r = malloc(sizeof(*r));
if (!r) redisOOM();
r->type = type;
if (r->element[j]) freeReplyObject(r->element[j]);
free(r->element);
break;
- default:
- if (r->str != NULL)
- free(r->str);
+ case REDIS_REPLY_ERROR:
+ case REDIS_REPLY_STATUS:
+ case REDIS_REPLY_STRING:
+ free(r->str);
break;
}
free(r);
r->len = len;
if (task->parent) {
- redisReply *parent = task->parent;
+ redisReply *parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
if ((r->element = calloc(sizeof(redisReply*),elements)) == NULL)
redisOOM();
if (task->parent) {
- redisReply *parent = task->parent;
+ redisReply *parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
redisReply *r = createReplyObject(REDIS_REPLY_INTEGER);
r->integer = value;
if (task->parent) {
- redisReply *parent = task->parent;
+ redisReply *parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
static void *createNilObject(const redisReadTask *task) {
redisReply *r = createReplyObject(REDIS_REPLY_NIL);
if (task->parent) {
- redisReply *parent = task->parent;
+ redisReply *parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
static char *readBytes(redisReader *r, unsigned int bytes) {
char *p;
- if (sdslen(r->buf)-r->pos >= bytes) {
+ if (r->len-r->pos >= bytes) {
p = r->buf+r->pos;
r->pos += bytes;
return p;
return NULL;
}
-static char *seekNewline(char *s) {
- /* Find pointer to \r\n without strstr */
- while (s != NULL) {
- s = strchr(s,'\r');
- if (s != NULL) {
- if (s[1] == '\n')
- break;
- else
- s++;
+/* Find pointer to \r\n. */
+static char *seekNewline(char *s, size_t len) {
+ int pos = 0;
+ int _len = len-1;
+
+ /* Position should be < len-1 because the character at "pos" should be
+ * followed by a \n. Note that strchr cannot be used because it doesn't
+ * allow to search a limited length and the buffer that is being searched
+ * might not have a trailing NULL character. */
+ while (pos < _len) {
+ while(pos < _len && s[pos] != '\r') pos++;
+ if (s[pos] != '\r') {
+ /* Not found. */
+ return NULL;
} else {
- break;
+ if (s[pos+1] == '\n') {
+ /* Found. */
+ return s+pos;
+ } else {
+ /* Continue searching. */
+ pos++;
+ }
+ }
+ }
+ return NULL;
+}
+
+/* Read a long long value starting at *s, under the assumption that it will be
+ * terminated by \r\n. Ambiguously returns -1 for unexpected input. */
+static long long readLongLong(char *s) {
+ long long v = 0;
+ int dec, mult = 1;
+ char c;
+
+ if (*s == '-') {
+ mult = -1;
+ s++;
+ } else if (*s == '+') {
+ mult = 1;
+ s++;
+ }
+
+ while ((c = *(s++)) != '\r') {
+ dec = c - '0';
+ if (dec >= 0 && dec < 10) {
+ v *= 10;
+ v += dec;
+ } else {
+ /* Should not happen... */
+ return -1;
}
}
- return s;
+
+ return mult*v;
}
static char *readLine(redisReader *r, int *_len) {
int len;
p = r->buf+r->pos;
- s = seekNewline(p);
+ s = seekNewline(p,(r->len-r->pos));
if (s != NULL) {
len = s-(r->buf+r->pos);
r->pos += len+2; /* skip \r\n */
int len;
if ((p = readLine(r,&len)) != NULL) {
- if (r->fn) {
- if (cur->type == REDIS_REPLY_INTEGER) {
- obj = r->fn->createInteger(cur,strtoll(p,NULL,10));
- } else {
- obj = r->fn->createString(cur,p,len);
- }
+ if (cur->type == REDIS_REPLY_INTEGER) {
+ if (r->fn && r->fn->createInteger)
+ obj = r->fn->createInteger(cur,readLongLong(p));
+ else
+ obj = (void*)REDIS_REPLY_INTEGER;
} else {
- obj = (void*)(size_t)(cur->type);
+ /* Type will be error or status. */
+ if (r->fn && r->fn->createString)
+ obj = r->fn->createString(cur,p,len);
+ else
+ obj = (void*)(size_t)(cur->type);
}
- /* If there is no root yet, register this object as root. */
- if (r->reply == NULL)
- r->reply = obj;
+ /* Set reply if this is the root object. */
+ if (r->ridx == 0) r->reply = obj;
moveToNextTask(r);
return 0;
}
char *p, *s;
long len;
unsigned long bytelen;
+ int success = 0;
p = r->buf+r->pos;
- s = seekNewline(p);
+ s = seekNewline(p,r->len-r->pos);
if (s != NULL) {
p = r->buf+r->pos;
bytelen = s-(r->buf+r->pos)+2; /* include \r\n */
- len = strtol(p,NULL,10);
+ len = readLongLong(p);
if (len < 0) {
/* The nil object can always be created. */
- obj = r->fn ? r->fn->createNil(cur) :
- (void*)REDIS_REPLY_NIL;
+ if (r->fn && r->fn->createNil)
+ obj = r->fn->createNil(cur);
+ else
+ obj = (void*)REDIS_REPLY_NIL;
+ success = 1;
} else {
/* Only continue when the buffer contains the entire bulk item. */
bytelen += len+2; /* include \r\n */
- if (r->pos+bytelen <= sdslen(r->buf)) {
- obj = r->fn ? r->fn->createString(cur,s+2,len) :
- (void*)REDIS_REPLY_STRING;
+ if (r->pos+bytelen <= r->len) {
+ if (r->fn && r->fn->createString)
+ obj = r->fn->createString(cur,s+2,len);
+ else
+ obj = (void*)REDIS_REPLY_STRING;
+ success = 1;
}
}
/* Proceed when obj was created. */
- if (obj != NULL) {
+ if (success) {
r->pos += bytelen;
- if (r->reply == NULL)
- r->reply = obj;
+
+ /* Set reply if this is the root object. */
+ if (r->ridx == 0) r->reply = obj;
moveToNextTask(r);
return 0;
}
void *obj;
char *p;
long elements;
+ int root = 0;
+
+ /* Set error for nested multi bulks with depth > 1 */
+ if (r->ridx == 8) {
+ redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
+ "No support for nested multi bulk replies with depth > 7"));
+ return -1;
+ }
if ((p = readLine(r,NULL)) != NULL) {
- elements = strtol(p,NULL,10);
+ elements = readLongLong(p);
+ root = (r->ridx == 0);
+
if (elements == -1) {
- obj = r->fn ? r->fn->createNil(cur) :
- (void*)REDIS_REPLY_NIL;
+ if (r->fn && r->fn->createNil)
+ obj = r->fn->createNil(cur);
+ else
+ obj = (void*)REDIS_REPLY_NIL;
moveToNextTask(r);
} else {
- obj = r->fn ? r->fn->createArray(cur,elements) :
- (void*)REDIS_REPLY_ARRAY;
+ if (r->fn && r->fn->createArray)
+ obj = r->fn->createArray(cur,elements);
+ else
+ obj = (void*)REDIS_REPLY_ARRAY;
/* Modify task stack when there are more than 0 elements. */
if (elements > 0) {
cur->elements = elements;
+ cur->obj = obj;
r->ridx++;
r->rstack[r->ridx].type = -1;
r->rstack[r->ridx].elements = -1;
- r->rstack[r->ridx].parent = obj;
r->rstack[r->ridx].idx = 0;
+ r->rstack[r->ridx].obj = NULL;
+ r->rstack[r->ridx].parent = cur;
+ r->rstack[r->ridx].privdata = r->privdata;
} else {
moveToNextTask(r);
}
}
- /* Object was created, so we can always continue. */
- if (r->reply == NULL)
- r->reply = obj;
+ /* Set reply if this is the root object. */
+ if (root) r->reply = obj;
return 0;
}
return -1;
default:
byte = sdscatrepr(sdsempty(),p,1);
redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
- "protocol error, got %s as reply type byte", byte));
+ "Protocol error, got %s as reply type byte", byte));
sdsfree(byte);
return -1;
}
case REDIS_REPLY_ARRAY:
return processMultiBulkItem(r);
default:
- redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
- "unknown item type '%d'", cur->type));
+ assert(NULL);
return -1;
}
}
-void *redisReplyReaderCreate() {
+void *redisReplyReaderCreate(void) {
redisReader *r = calloc(sizeof(redisReader),1);
r->error = NULL;
r->fn = &defaultFunctions;
return REDIS_ERR;
}
+/* Set the private data field that is used in the read tasks. This argument can
+ * be used to curry arbitrary data to the custom reply object functions. */
+int redisReplyReaderSetPrivdata(void *reader, void *privdata) {
+ redisReader *r = reader;
+ if (r->reply == NULL) {
+ r->privdata = privdata;
+ return REDIS_OK;
+ }
+ return REDIS_ERR;
+}
+
/* External libraries wrapping hiredis might need access to the temporary
* variable while the reply is built up. When the reader contains an
* object in between receiving some bytes to parse, this object might
if (r->buf != NULL) {
sdsfree(r->buf);
r->buf = sdsempty();
- r->pos = 0;
+ r->pos = r->len = 0;
}
r->ridx = -1;
r->error = err;
return r->error;
}
-void redisReplyReaderFeed(void *reader, char *buf, size_t len) {
+void redisReplyReaderFeed(void *reader, const char *buf, size_t len) {
redisReader *r = reader;
/* Copy the provided buffer. */
- if (buf != NULL && len >= 1)
+ if (buf != NULL && len >= 1) {
+ /* Destroy internal buffer when it is empty and is quite large. */
+ if (r->len == 0 && sdsavail(r->buf) > 16*1024) {
+ sdsfree(r->buf);
+ r->buf = sdsempty();
+ r->pos = 0;
+ }
+
r->buf = sdscatlen(r->buf,buf,len);
+ r->len = sdslen(r->buf);
+ }
}
int redisReplyReaderGetReply(void *reader, void **reply) {
if (reply != NULL) *reply = NULL;
/* When the buffer is empty, there will never be a reply. */
- if (sdslen(r->buf) == 0)
+ if (r->len == 0)
return REDIS_OK;
/* Set first item to process when the stack is empty. */
if (r->ridx == -1) {
r->rstack[0].type = -1;
r->rstack[0].elements = -1;
- r->rstack[0].parent = NULL;
r->rstack[0].idx = -1;
+ r->rstack[0].obj = NULL;
+ r->rstack[0].parent = NULL;
+ r->rstack[0].privdata = r->privdata;
r->ridx = 0;
}
if (processItem(r) < 0)
break;
- /* Discard the consumed part of the buffer. */
- if (r->pos > 0) {
- if (r->pos == sdslen(r->buf)) {
- /* sdsrange has a quirck on this edge case. */
- sdsfree(r->buf);
- r->buf = sdsempty();
- } else {
- r->buf = sdsrange(r->buf,r->pos,sdslen(r->buf));
- }
+ /* Discard part of the buffer when we've consumed at least 1k, to avoid
+ * doing unnecessary calls to memmove() in sds.c. */
+ if (r->pos >= 1024) {
+ r->buf = sdsrange(r->buf,r->pos,-1);
r->pos = 0;
+ r->len = sdslen(r->buf);
}
/* Emit a reply when there is one. */
void *aux = r->reply;
r->reply = NULL;
- /* Destroy the buffer when it is empty and is quite large. */
- if (sdslen(r->buf) == 0 && sdsavail(r->buf) > 16*1024) {
- sdsfree(r->buf);
- r->buf = sdsempty();
- r->pos = 0;
- }
-
/* Check if there actually *is* a reply. */
if (r->error != NULL) {
return REDIS_ERR;
char *cmd = NULL; /* final command */
int pos; /* position in final command */
sds current; /* current argument */
+ int touched = 0; /* was the current argument touched? */
char **argv = NULL;
int argc = 0, j;
int totlen = 0;
while(*c != '\0') {
if (*c != '%' || c[1] == '\0') {
if (*c == ' ') {
- if (sdslen(current) != 0) {
+ if (touched) {
addArgument(current, &argv, &argc, &totlen);
current = sdsempty();
+ touched = 0;
}
} else {
current = sdscatlen(current,c,1);
+ touched = 1;
}
} else {
switch(c[1]) {
case 's':
arg = va_arg(ap,char*);
- current = sdscat(current,arg);
+ size = strlen(arg);
+ if (size > 0)
+ current = sdscatlen(current,arg,size);
break;
case 'b':
arg = va_arg(ap,char*);
size = va_arg(ap,size_t);
- current = sdscatlen(current,arg,size);
+ if (size > 0)
+ current = sdscatlen(current,arg,size);
break;
case '%':
- cmd = sdscat(cmd,"%");
+ current = sdscat(current,"%");
break;
+ default:
+ /* Try to detect printf format */
+ {
+ char _format[16];
+ const char *_p = c+1;
+ size_t _l = 0;
+ va_list _cpy;
+
+ /* Flags */
+ if (*_p != '\0' && *_p == '#') _p++;
+ if (*_p != '\0' && *_p == '0') _p++;
+ if (*_p != '\0' && *_p == '-') _p++;
+ if (*_p != '\0' && *_p == ' ') _p++;
+ if (*_p != '\0' && *_p == '+') _p++;
+
+ /* Field width */
+ while (*_p != '\0' && isdigit(*_p)) _p++;
+
+ /* Precision */
+ if (*_p == '.') {
+ _p++;
+ while (*_p != '\0' && isdigit(*_p)) _p++;
+ }
+
+ /* Modifiers */
+ if (*_p != '\0') {
+ if (*_p == 'h' || *_p == 'l') {
+ /* Allow a single repetition for these modifiers */
+ if (_p[0] == _p[1]) _p++;
+ _p++;
+ }
+ }
+
+ /* Conversion specifier */
+ if (*_p != '\0' && strchr("diouxXeEfFgGaA",*_p) != NULL) {
+ _l = (_p+1)-c;
+ if (_l < sizeof(_format)-2) {
+ memcpy(_format,c,_l);
+ _format[_l] = '\0';
+ va_copy(_cpy,ap);
+ current = sdscatvprintf(current,_format,_cpy);
+ va_end(_cpy);
+
+ /* Update current position (note: outer blocks
+ * increment c twice so compensate here) */
+ c = _p-1;
+ }
+ }
+
+ /* Consume and discard vararg */
+ va_arg(ap,void);
+ }
}
+ touched = 1;
c++;
}
c++;
}
/* Add the last argument if needed */
- if (sdslen(current) != 0) {
+ if (touched) {
addArgument(current, &argv, &argc, &totlen);
} else {
sdsfree(current);
}
}
-static redisContext *redisContextInit() {
+static redisContext *redisContextInit(void) {
redisContext *c = calloc(sizeof(redisContext),1);
- c->fd = -1; /* quick fix for a bug that should be addressed differently */
c->err = 0;
c->errstr = NULL;
c->obuf = sdsempty();
}
void redisFree(redisContext *c) {
- /* Disconnect before free'ing if not yet disconnected. */
- if (c->flags & REDIS_CONNECTED)
+ if (c->fd > 0)
close(c->fd);
if (c->errstr != NULL)
sdsfree(c->errstr);
redisContext *redisConnect(const char *ip, int port) {
redisContext *c = redisContextInit();
c->flags |= REDIS_BLOCK;
- c->flags |= REDIS_CONNECTED;
- redisContextConnectTcp(c,ip,port);
+ redisContextConnectTcp(c,ip,port,NULL);
+ return c;
+}
+
+redisContext *redisConnectWithTimeout(const char *ip, int port, struct timeval tv) {
+ redisContext *c = redisContextInit();
+ c->flags |= REDIS_BLOCK;
+ redisContextConnectTcp(c,ip,port,&tv);
return c;
}
redisContext *redisConnectNonBlock(const char *ip, int port) {
redisContext *c = redisContextInit();
c->flags &= ~REDIS_BLOCK;
- c->flags |= REDIS_CONNECTED;
- redisContextConnectTcp(c,ip,port);
+ redisContextConnectTcp(c,ip,port,NULL);
return c;
}
redisContext *redisConnectUnix(const char *path) {
redisContext *c = redisContextInit();
c->flags |= REDIS_BLOCK;
- c->flags |= REDIS_CONNECTED;
- redisContextConnectUnix(c,path);
+ redisContextConnectUnix(c,path,NULL);
+ return c;
+}
+
+redisContext *redisConnectUnixWithTimeout(const char *path, struct timeval tv) {
+ redisContext *c = redisContextInit();
+ c->flags |= REDIS_BLOCK;
+ redisContextConnectUnix(c,path,&tv);
return c;
}
redisContext *redisConnectUnixNonBlock(const char *path) {
redisContext *c = redisContextInit();
c->flags &= ~REDIS_BLOCK;
- c->flags |= REDIS_CONNECTED;
- redisContextConnectUnix(c,path);
+ redisContextConnectUnix(c,path,NULL);
return c;
}
+/* Set read/write timeout on a blocking socket. */
+int redisSetTimeout(redisContext *c, struct timeval tv) {
+ if (c->flags & REDIS_BLOCK)
+ return redisContextSetTimeout(c,tv);
+ return REDIS_ERR;
+}
+
/* Set the replyObjectFunctions to use. Returns REDIS_ERR when the reader
* was already initialized and the function set could not be re-set.
* Return REDIS_OK when they could be set. */
char buf[2048];
int nread = read(c->fd,buf,sizeof(buf));
if (nread == -1) {
- if (errno == EAGAIN) {
+ if (errno == EAGAIN && !(c->flags & REDIS_BLOCK)) {
/* Try again later */
} else {
__redisSetError(c,REDIS_ERR_IO,NULL);
if (sdslen(c->obuf) > 0) {
nwritten = write(c->fd,c->obuf,sdslen(c->obuf));
if (nwritten == -1) {
- if (errno == EAGAIN) {
+ if (errno == EAGAIN && !(c->flags & REDIS_BLOCK)) {
/* Try again later */
} else {
__redisSetError(c,REDIS_ERR_IO,NULL);
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