/*
- * Copyright (c) 2009-201
0, Salvatore Sanfilippo <antirez at gmail dot com>
- * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ * Copyright (c) 2009-201
1, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010
-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
*
* All rights reserved.
*
* POSSIBILITY OF SUCH DAMAGE.
*/
+#include "fmacros.h"
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "hiredis.h"
#include "net.h"
#include "sds.h"
-#include "util.h"
-
-typedef struct redisReader {
- struct redisReplyObjectFunctions *fn;
- sds error; /* holds optional error */
- void *reply; /* holds temporary reply */
-
- sds buf; /* read buffer */
- size_t pos; /* buffer cursor */
- size_t len; /* buffer length */
-
- redisReadTask rstack[9]; /* stack of read tasks */
- int ridx; /* index of stack */
- void *privdata; /* user-settable arbitrary field */
-} redisReader;
static redisReply *createReplyObject(int type);
static void *createStringObject(const redisReadTask *task, char *str, size_t len);
static void *createArrayObject(const redisReadTask *task, int elements);
static void *createIntegerObject(const redisReadTask *task, long long value);
static void *createNilObject(const redisReadTask *task);
-static void redisSetReplyReaderError(redisReader *r, sds err);
-/* Default set of functions to build the reply. */
+/* Default set of functions to build the reply. Keep in mind that such a
+ * function returning NULL is interpreted as OOM. */
static redisReplyObjectFunctions defaultFunctions = {
createStringObject,
createArrayObject,
/* Create a reply object */
static redisReply *createReplyObject(int type) {
- redisReply *r = malloc(sizeof(*r));
+ redisReply *r = calloc(1,sizeof(*r));
+
+ if (r == NULL)
+ return NULL;
- if (!r) redisOOM();
r->type = type;
return r;
}
case REDIS_REPLY_INTEGER:
break; /* Nothing to free */
case REDIS_REPLY_ARRAY:
- for (j = 0; j < r->elements; j++)
- if (r->element[j]) freeReplyObject(r->element[j]);
- free(r->element);
+ if (r->element != NULL) {
+ for (j = 0; j < r->elements; j++)
+ if (r->element[j] != NULL)
+ freeReplyObject(r->element[j]);
+ free(r->element);
+ }
break;
case REDIS_REPLY_ERROR:
case REDIS_REPLY_STATUS:
case REDIS_REPLY_STRING:
- free(r->str);
+ if (r->str != NULL)
+ free(r->str);
break;
}
free(r);
}
static void *createStringObject(const redisReadTask *task, char *str, size_t len) {
- redisReply *r = createReplyObject(task->type);
- char *value = malloc(len+1);
- if (!value) redisOOM();
- assert(task->type == REDIS_REPLY_ERROR ||
+ redisReply *r, *parent;
+ char *buf;
+
+ r = createReplyObject(task->type);
+ if (r == NULL)
+ return NULL;
+
+ buf = malloc(len+1);
+ if (buf == NULL) {
+ freeReplyObject(r);
+ return NULL;
+ }
+
+ assert(task->type == REDIS_REPLY_ERROR ||
task->type == REDIS_REPLY_STATUS ||
task->type == REDIS_REPLY_STRING);
/* Copy string value */
- memcpy(value,str,len);
- value[len] = '\0';
- r->str = value;
+ memcpy(buf,str,len);
+ buf[len] = '\0';
+ r->str = buf;
r->len = len;
if (task->parent) {
- redisReply *parent = task->parent->obj;
+ parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
}
static void *createArrayObject(const redisReadTask *task, int elements) {
- redisReply *r = createReplyObject(REDIS_REPLY_ARRAY);
+ redisReply *r, *parent;
+
+ r = createReplyObject(REDIS_REPLY_ARRAY);
+ if (r == NULL)
+ return NULL;
+
+ if (elements > 0) {
+ r->element = calloc(elements,sizeof(redisReply*));
+ if (r->element == NULL) {
+ freeReplyObject(r);
+ return NULL;
+ }
+ }
+
r->elements = elements;
- if ((r->element = calloc(sizeof(redisReply*),elements)) == NULL)
- redisOOM();
+
if (task->parent) {
- redisReply *parent = task->parent->obj;
+ parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
}
static void *createIntegerObject(const redisReadTask *task, long long value) {
- redisReply *r = createReplyObject(REDIS_REPLY_INTEGER);
+ redisReply *r, *parent;
+
+ r = createReplyObject(REDIS_REPLY_INTEGER);
+ if (r == NULL)
+ return NULL;
+
r->integer = value;
+
if (task->parent) {
- redisReply *parent = task->parent->obj;
+ 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);
+ redisReply *r, *parent;
+
+ r = createReplyObject(REDIS_REPLY_NIL);
+ if (r == NULL)
+ return NULL;
+
if (task->parent) {
- redisReply *parent = task->parent->obj;
+ parent = task->parent->obj;
assert(parent->type == REDIS_REPLY_ARRAY);
parent->element[task->idx] = r;
}
return r;
}
+static void __redisReaderSetError(redisReader *r, int type, const char *str) {
+ size_t len;
+
+ if (r->reply != NULL && r->fn && r->fn->freeObject) {
+ r->fn->freeObject(r->reply);
+ r->reply = NULL;
+ }
+
+ /* Clear input buffer on errors. */
+ if (r->buf != NULL) {
+ sdsfree(r->buf);
+ r->buf = NULL;
+ r->pos = r->len = 0;
+ }
+
+ /* Reset task stack. */
+ r->ridx = -1;
+
+ /* Set error. */
+ r->err = type;
+ len = strlen(str);
+ len = len < (sizeof(r->errstr)-1) ? len : (sizeof(r->errstr)-1);
+ memcpy(r->errstr,str,len);
+ r->errstr[len] = '\0';
+}
+
+static size_t chrtos(char *buf, size_t size, char byte) {
+ size_t len = 0;
+
+ switch(byte) {
+ case '\\':
+ case '"':
+ len = snprintf(buf,size,"\"\\%c\"",byte);
+ break;
+ case '\n': len = snprintf(buf,size,"\"\\n\""); break;
+ case '\r': len = snprintf(buf,size,"\"\\r\""); break;
+ case '\t': len = snprintf(buf,size,"\"\\t\""); break;
+ case '\a': len = snprintf(buf,size,"\"\\a\""); break;
+ case '\b': len = snprintf(buf,size,"\"\\b\""); break;
+ default:
+ if (isprint(byte))
+ len = snprintf(buf,size,"\"%c\"",byte);
+ else
+ len = snprintf(buf,size,"\"\\x%02x\"",(unsigned char)byte);
+ break;
+ }
+
+ return len;
+}
+
+static void __redisReaderSetErrorProtocolByte(redisReader *r, char byte) {
+ char cbuf[8], sbuf[128];
+
+ chrtos(cbuf,sizeof(cbuf),byte);
+ snprintf(sbuf,sizeof(sbuf),
+ "Protocol error, got %s as reply type byte", cbuf);
+ __redisReaderSetError(r,REDIS_ERR_PROTOCOL,sbuf);
+}
+
+static void __redisReaderSetErrorOOM(redisReader *r) {
+ __redisReaderSetError(r,REDIS_ERR_OOM,"Out of memory");
+}
+
static char *readBytes(redisReader *r, unsigned int bytes) {
char *p;
if (r->len-r->pos >= bytes) {
obj = (void*)(size_t)(cur->type);
}
+ if (obj == NULL) {
+ __redisReaderSetErrorOOM(r);
+ return REDIS_ERR;
+ }
+
/* Set reply if this is the root object. */
if (r->ridx == 0) r->reply = obj;
moveToNextTask(r);
- return 0;
+ return REDIS_OK;
}
- return -1;
+
+ return REDIS_ERR;
}
static int processBulkItem(redisReader *r) {
/* Proceed when obj was created. */
if (success) {
+ if (obj == NULL) {
+ __redisReaderSetErrorOOM(r);
+ return REDIS_ERR;
+ }
+
r->pos += bytelen;
/* Set reply if this is the root object. */
if (r->ridx == 0) r->reply = obj;
moveToNextTask(r);
- return 0;
+ return REDIS_OK;
}
}
- return -1;
+
+ return REDIS_ERR;
}
static int processMultiBulkItem(redisReader *r) {
long elements;
int root = 0;
- /* Set error for nested multi bulks with depth > 1 */
+ /* Set error for nested multi bulks with depth > 2 */
if (r->ridx == 8) {
- redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
- "No support for nested multi bulk replies with depth > 7"));
- return -1;
+ __redisReaderSetError(r,REDIS_ERR_PROTOCOL,
+ "No support for nested multi bulk replies with depth > 7");
+ return REDIS_ERR;
}
if ((p = readLine(r,NULL)) != NULL) {
obj = r->fn->createNil(cur);
else
obj = (void*)REDIS_REPLY_NIL;
+
+ if (obj == NULL) {
+ __redisReaderSetErrorOOM(r);
+ return REDIS_ERR;
+ }
+
moveToNextTask(r);
} else {
if (r->fn && r->fn->createArray)
else
obj = (void*)REDIS_REPLY_ARRAY;
+ if (obj == NULL) {
+ __redisReaderSetErrorOOM(r);
+ return REDIS_ERR;
+ }
+
/* Modify task stack when there are more than 0 elements. */
if (elements > 0) {
cur->elements = elements;
/* Set reply if this is the root object. */
if (root) r->reply = obj;
- return 0;
+ return REDIS_OK;
}
- return -1;
+
+ return REDIS_ERR;
}
static int processItem(redisReader *r) {
redisReadTask *cur = &(r->rstack[r->ridx]);
char *p;
- sds byte;
/* check if we need to read type */
if (cur->type < 0) {
cur->type = REDIS_REPLY_ARRAY;
break;
default:
- byte = sdscatrepr(sdsempty(),p,1);
- redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
- "Protocol error, got %s as reply type byte", byte));
- sdsfree(byte);
- return -1;
+ __redisReaderSetErrorProtocolByte(r,*p);
+ return REDIS_ERR;
}
} else {
/* could not consume 1 byte */
- return -1;
+ return REDIS_ERR;
}
}
return processMultiBulkItem(r);
default:
assert(NULL);
- return -1;
+ return REDIS_ERR; /* Avoid warning. */
}
}
-void *redisReplyReaderCreate(void) {
- redisReader *r = calloc(sizeof(redisReader),1);
- r->error = NULL;
- r->fn = &defaultFunctions;
- r->buf = sdsempty();
- r->ridx = -1;
- return r;
-}
+redisReader *redisReaderCreate(void) {
+ redisReader *r;
-/* Set the function set to build the reply. Returns REDIS_OK when there
- * is no temporary object and it can be set, REDIS_ERR otherwise. */
-int redisReplyReaderSetReplyObjectFunctions(void *reader, redisReplyObjectFunctions *fn) {
- redisReader *r = reader;
- if (r->reply == NULL) {
- r->fn = fn;
- return REDIS_OK;
- }
- return REDIS_ERR;
-}
+ r = calloc(sizeof(redisReader),1);
+ if (r == NULL)
+ return NULL;
-/* 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;
+ r->err = 0;
+ r->errstr[0] = '\0';
+ r->fn = &defaultFunctions;
+ r->buf = sdsempty();
+ if (r->buf == NULL) {
+ free(r);
+ return NULL;
}
- 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
- * otherwise be free'd by garbage collection. */
-void *redisReplyReaderGetObject(void *reader) {
- redisReader *r = reader;
- return r->reply;
+ r->ridx = -1;
+ return r;
}
-void redisReplyReaderFree(void *reader) {
- redisReader *r = reader;
- if (r->error != NULL)
- sdsfree(r->error);
- if (r->reply != NULL && r->fn)
+void redisReaderFree(redisReader *r) {
+ if (r->reply != NULL && r->fn && r->fn->freeObject)
r->fn->freeObject(r->reply);
if (r->buf != NULL)
sdsfree(r->buf);
free(r);
}
-static void redisSetReplyReaderError(redisReader *r, sds err) {
- if (r->reply != NULL)
- r->fn->freeObject(r->reply);
-
- /* Clear remaining buffer when we see a protocol error. */
- if (r->buf != NULL) {
- sdsfree(r->buf);
- r->buf = sdsempty();
- r->pos = r->len = 0;
- }
- r->ridx = -1;
- r->error = err;
-}
-
-char *redisReplyReaderGetError(void *reader) {
- redisReader *r = reader;
- return r->error;
-}
+int redisReaderFeed(redisReader *r, const char *buf, size_t len) {
+ sds newbuf;
-void redisReplyReaderFeed(void *reader, const char *buf, size_t len) {
- redisReader *r = reader;
+ /* Return early when this reader is in an erroneous state. */
+ if (r->err)
+ return REDIS_ERR;
/* Copy the provided buffer. */
if (buf != NULL && len >= 1) {
sdsfree(r->buf);
r->buf = sdsempty();
r->pos = 0;
+
+ /* r->buf should not be NULL since we just free'd a larger one. */
+ assert(r->buf != NULL);
}
#endif
- r->buf = sdscatlen(r->buf,buf,len);
+
+ newbuf = sdscatlen(r->buf,buf,len);
+ if (newbuf == NULL) {
+ __redisReaderSetErrorOOM(r);
+ return REDIS_ERR;
+ }
+
+ r->buf = newbuf;
r->len = sdslen(r->buf);
}
+
+ return REDIS_OK;
}
-int redisReplyReaderGetReply(void *reader, void **reply) {
- redisReader *r = reader;
- if (reply != NULL) *reply = NULL;
+int redisReaderGetReply(redisReader *r, void **reply) {
+ /* Default target pointer to NULL. */
+ if (reply != NULL)
+ *reply = NULL;
+
+ /* Return early when this reader is in an erroneous state. */
+ if (r->err)
+ return REDIS_ERR;
/* When the buffer is empty, there will never be a reply. */
if (r->len == 0)
/* Process items in reply. */
while (r->ridx >= 0)
- if (processItem(r) < 0)
+ if (processItem(r) != REDIS_OK)
break;
+ /* Return ASAP when an error occurred. */
+ if (r->err)
+ return REDIS_ERR;
+
/* 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) {
/* Emit a reply when there is one. */
if (r->ridx == -1) {
- void *aux = r->reply;
+ if (reply != NULL)
+ *reply = r->reply;
r->reply = NULL;
-
- /* Check if there actually *is* a reply. */
- if (r->error != NULL) {
- return REDIS_ERR;
- } else {
- if (reply != NULL) *reply = aux;
- }
}
return REDIS_OK;
}
return len;
}
-/* Helper function for redisvFormatCommand(). */
-static void addArgument(sds a, char ***argv, int *argc, int *totlen) {
- (*argc)++;
- if ((*argv = realloc(*argv, sizeof(char*)*(*argc))) == NULL) redisOOM();
- if (totlen) *totlen = *totlen+1+intlen(sdslen(a))+2+sdslen(a)+2;
- (*argv)[(*argc)-1] = a;
+/* Helper that calculates the bulk length given a certain string length. */
+static size_t bulklen(size_t len) {
+ return 1+intlen(len)+2+len+2;
}
int redisvFormatCommand(char **target, const char *format, va_list ap) {
- size_t size;
- const char *arg, *c = format;
+ const char *c = format;
char *cmd = NULL; /* final command */
int pos; /* position in final command */
- sds current; /* current argument */
+ sds curarg, newarg; /* current argument */
int touched = 0; /* was the current argument touched? */
- char **argv = NULL;
- int argc = 0, j;
+ char **curargv = NULL, **newargv = NULL;
+ int argc = 0;
int totlen = 0;
+ int j;
/* Abort if there is not target to set */
if (target == NULL)
return -1;
/* Build the command string accordingly to protocol */
- current = sdsempty();
+ curarg = sdsempty();
+ if (curarg == NULL)
+ return -1;
+
while(*c != '\0') {
if (*c != '%' || c[1] == '\0') {
if (*c == ' ') {
if (touched) {
- addArgument(current, &argv, &argc, &totlen);
- current = sdsempty();
+ newargv = realloc(curargv,sizeof(char*)*(argc+1));
+ if (newargv == NULL) goto err;
+ curargv = newargv;
+ curargv[argc++] = curarg;
+ totlen += bulklen(sdslen(curarg));
+
+ /* curarg is put in argv so it can be overwritten. */
+ curarg = sdsempty();
+ if (curarg == NULL) goto err;
touched = 0;
}
} else {
- current = sdscatlen(current,c,1);
+ newarg = sdscatlen(curarg,c,1);
+ if (newarg == NULL) goto err;
+ curarg = newarg;
touched = 1;
}
} else {
+ char *arg;
+ size_t size;
+
+ /* Set newarg so it can be checked even if it is not touched. */
+ newarg = curarg;
+
switch(c[1]) {
case 's':
arg = va_arg(ap,char*);
size = strlen(arg);
if (size > 0)
- current = sdscatlen(current,arg,size);
+ newarg = sdscatlen(curarg,arg,size);
break;
case 'b':
arg = va_arg(ap,char*);
size = va_arg(ap,size_t);
if (size > 0)
- current = sdscatlen(current,arg,size);
+ newarg = sdscatlen(curarg,arg,size);
break;
case '%':
- current = sdscat(current,"%");
+ newarg = sdscat(curarg,"%");
break;
default:
/* Try to detect printf format */
{
+ static const char intfmts[] = "diouxX";
char _format[16];
const char *_p = c+1;
size_t _l = 0;
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++;
+ /* Copy va_list before consuming with va_arg */
+ va_copy(_cpy,ap);
+
+ /* Integer conversion (without modifiers) */
+ if (strchr(intfmts,*_p) != NULL) {
+ va_arg(ap,int);
+ goto fmt_valid;
+ }
+
+ /* Double conversion (without modifiers) */
+ if (strchr("eEfFgGaA",*_p) != NULL) {
+ va_arg(ap,double);
+ goto fmt_valid;
+ }
+
+ /* Size: char */
+ if (_p[0] == 'h' && _p[1] == 'h') {
+ _p += 2;
+ if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
+ va_arg(ap,int); /* char gets promoted to int */
+ goto fmt_valid;
}
+ goto fmt_invalid;
}
- /* 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;
+ /* Size: short */
+ if (_p[0] == 'h') {
+ _p += 1;
+ if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
+ va_arg(ap,int); /* short gets promoted to int */
+ goto fmt_valid;
}
+ goto fmt_invalid;
}
- /* Consume and discard vararg */
- va_arg(ap,void);
+ /* Size: long long */
+ if (_p[0] == 'l' && _p[1] == 'l') {
+ _p += 2;
+ if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
+ va_arg(ap,long long);
+ goto fmt_valid;
+ }
+ goto fmt_invalid;
+ }
+
+ /* Size: long */
+ if (_p[0] == 'l') {
+ _p += 1;
+ if (*_p != '\0' && strchr(intfmts,*_p) != NULL) {
+ va_arg(ap,long);
+ goto fmt_valid;
+ }
+ goto fmt_invalid;
+ }
+
+ fmt_invalid:
+ va_end(_cpy);
+ goto err;
+
+ fmt_valid:
+ _l = (_p+1)-c;
+ if (_l < sizeof(_format)-2) {
+ memcpy(_format,c,_l);
+ _format[_l] = '\0';
+ newarg = sdscatvprintf(curarg,_format,_cpy);
+
+ /* Update current position (note: outer blocks
+ * increment c twice so compensate here) */
+ c = _p-1;
+ }
+
+ va_end(_cpy);
+ break;
}
}
+
+ if (newarg == NULL) goto err;
+ curarg = newarg;
+
touched = 1;
c++;
}
/* Add the last argument if needed */
if (touched) {
- addArgument(current, &argv, &argc, &totlen);
+ newargv = realloc(curargv,sizeof(char*)*(argc+1));
+ if (newargv == NULL) goto err;
+ curargv = newargv;
+ curargv[argc++] = curarg;
+ totlen += bulklen(sdslen(curarg));
} else {
- sdsfree(current);
+ sdsfree(curarg);
}
+ /* Clear curarg because it was put in curargv or was free'd. */
+ curarg = NULL;
+
/* Add bytes needed to hold multi bulk count */
totlen += 1+intlen(argc)+2;
/* Build the command at protocol level */
cmd = malloc(totlen+1);
- if (!cmd) redisOOM();
+ if (cmd == NULL) goto err;
+
pos = sprintf(cmd,"*%d\r\n",argc);
for (j = 0; j < argc; j++) {
- pos += sprintf(cmd+pos,"$%zu\r\n",sdslen(argv[j]));
- memcpy(cmd+pos,argv[j],sdslen(argv[j]));
- pos += sdslen(argv[j]);
- sdsfree(argv[j]);
+ pos += sprintf(cmd+pos,"$%zu\r\n",sdslen(curargv[j]));
+ memcpy(cmd+pos,curargv[j],sdslen(curargv[j]));
+ pos += sdslen(curargv[j]);
+ sdsfree(curargv[j]);
cmd[pos++] = '\r';
cmd[pos++] = '\n';
}
assert(pos == totlen);
- free(argv);
- cmd[totlen] = '\0';
+ cmd[pos] = '\0';
+
+ free(curargv);
*target = cmd;
return totlen;
+
+err:
+ while(argc--)
+ sdsfree(curargv[argc]);
+ free(curargv);
+
+ if (curarg != NULL)
+ sdsfree(curarg);
+
+ /* No need to check cmd since it is the last statement that can fail,
+ * but do it anyway to be as defensive as possible. */
+ if (cmd != NULL)
+ free(cmd);
+
+ return -1;
}
/* Format a command according to the Redis protocol. This function
totlen = 1+intlen(argc)+2;
for (j = 0; j < argc; j++) {
len = argvlen ? argvlen[j] : strlen(argv[j]);
- totlen += 1+intlen(len)+2+len+2;
+ totlen += bulklen(len);
}
/* Build the command at protocol level */
cmd = malloc(totlen+1);
- if (!cmd) redisOOM();
+ if (cmd == NULL)
+ return -1;
+
pos = sprintf(cmd,"*%d\r\n",argc);
for (j = 0; j < argc; j++) {
len = argvlen ? argvlen[j] : strlen(argv[j]);
cmd[pos++] = '\n';
}
assert(pos == totlen);
- cmd[totlen] = '\0';
+ cmd[pos] = '\0';
+
*target = cmd;
return totlen;
}
-void __redisSetError(redisContext *c, int type, const sds errstr) {
+void __redisSetError(redisContext *c, int type, const char *str) {
+ size_t len;
+
c->err = type;
- if (errstr != NULL) {
- c->errstr = errstr;
+ if (str != NULL) {
+ len = strlen(str);
+ len = len < (sizeof(c->errstr)-1) ? len : (sizeof(c->errstr)-1);
+ memcpy(c->errstr,str,len);
+ c->errstr[len] = '\0';
} else {
/* Only REDIS_ERR_IO may lack a description! */
assert(type == REDIS_ERR_IO);
- c->errstr = sdsnew(strerror(errno));
+ strerror_r(errno,c->errstr,sizeof(c->errstr));
}
}
static redisContext *redisContextInit(void) {
- redisContext *c = calloc(sizeof(redisContext),1);
+ redisContext *c;
+
+ c = calloc(1,sizeof(redisContext));
+ if (c == NULL)
+ return NULL;
+
c->err = 0;
- c->errstr = NULL;
+ c->errstr[0] = '\0';
c->obuf = sdsempty();
- c->fn = &defaultFunctions;
- c->reader = NULL;
+ c->reader = redisReaderCreate();
return c;
}
void redisFree(redisContext *c) {
if (c->fd > 0)
close(c->fd);
- if (c->errstr != NULL)
- sdsfree(c->errstr);
if (c->obuf != NULL)
sdsfree(c->obuf);
if (c->reader != NULL)
- redisReplyReaderFree(c->reader);
+ redisReaderFree(c->reader);
free(c);
}
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. */
-int redisSetReplyObjectFunctions(redisContext *c, redisReplyObjectFunctions *fn) {
- if (c->reader != NULL)
- return REDIS_ERR;
- c->fn = fn;
- return REDIS_OK;
-}
-
-/* Helper function to lazily create a reply reader. */
-static void __redisCreateReplyReader(redisContext *c) {
- if (c->reader == NULL) {
- c->reader = redisReplyReaderCreate();
- assert(redisReplyReaderSetReplyObjectFunctions(c->reader,c->fn) == REDIS_OK);
- }
-}
-
/* Use this function to handle a read event on the descriptor. It will try
* and read some bytes from the socket and feed them to the reply parser.
*
* see if there is a reply available. */
int redisBufferRead(redisContext *c) {
char buf[1024*16];
- int nread = read(c->fd,buf,sizeof(buf));
+ int nread;
+
+ /* Return early when the context has seen an error. */
+ if (c->err)
+ return REDIS_ERR;
+
+ nread = read(c->fd,buf,sizeof(buf));
if (nread == -1) {
if (errno == EAGAIN && !(c->flags & REDIS_BLOCK)) {
/* Try again later */
return REDIS_ERR;
}
} else if (nread == 0) {
- __redisSetError(c,REDIS_ERR_EOF,
- sdsnew("Server closed the connection"));
+ __redisSetError(c,REDIS_ERR_EOF,"Server closed the connection");
return REDIS_ERR;
} else {
- __redisCreateReplyReader(c);
- redisReplyReaderFeed(c->reader,buf,nread);
+ if (redisReaderFeed(c->reader,buf,nread) != REDIS_OK) {
+ __redisSetError(c,c->reader->err,c->reader->errstr);
+ return REDIS_ERR;
+ }
}
return REDIS_OK;
}
*
* Returns REDIS_OK when the buffer is empty, or (a part of) the buffer was
* succesfully written to the socket. When the buffer is empty after the
- * write operation, "wdone" is set to 1 (if given).
+ * write operation, "done" is set to 1 (if given).
*
* Returns REDIS_ERR if an error occured trying to write and sets
- * c->error to hold the appropriate error string.
+ * c->errstr to hold the appropriate error string.
*/
int redisBufferWrite(redisContext *c, int *done) {
int nwritten;
+
+ /* Return early when the context has seen an error. */
+ if (c->err)
+ return REDIS_ERR;
+
if (sdslen(c->obuf) > 0) {
nwritten = write(c->fd,c->obuf,sdslen(c->obuf));
if (nwritten == -1) {
/* Internal helper function to try and get a reply from the reader,
* or set an error in the context otherwise. */
int redisGetReplyFromReader(redisContext *c, void **reply) {
- __redisCreateReplyReader(c);
- if (redisReplyReaderGetReply(c->reader,reply) == REDIS_ERR) {
- __redisSetError(c,REDIS_ERR_PROTOCOL,
- sdsnew(((redisReader*)c->reader)->error));
+ if (redisReaderGetReply(c->reader,reply) == REDIS_ERR) {
+ __redisSetError(c,c->reader->err,c->reader->errstr);
return REDIS_ERR;
}
return REDIS_OK;
* is used, you need to call redisGetReply yourself to retrieve
* the reply (or replies in pub/sub).
*/
-void __redisAppendCommand(redisContext *c, char *cmd, size_t len) {
- c->obuf = sdscatlen(c->obuf,cmd,len);
+int __redisAppendCommand(redisContext *c, char *cmd, size_t len) {
+ sds newbuf;
+
+ newbuf = sdscatlen(c->obuf,cmd,len);
+ if (newbuf == NULL) {
+ __redisSetError(c,REDIS_ERR_OOM,"Out of memory");
+ return REDIS_ERR;
+ }
+
+ c->obuf = newbuf;
+ return REDIS_OK;
}
-void redisvAppendCommand(redisContext *c, const char *format, va_list ap) {
+int redisvAppendCommand(redisContext *c, const char *format, va_list ap) {
char *cmd;
int len;
+
len = redisvFormatCommand(&cmd,format,ap);
- __redisAppendCommand(c,cmd,len);
+ if (len == -1) {
+ __redisSetError(c,REDIS_ERR_OOM,"Out of memory");
+ return REDIS_ERR;
+ }
+
+ if (__redisAppendCommand(c,cmd,len) != REDIS_OK) {
+ free(cmd);
+ return REDIS_ERR;
+ }
+
free(cmd);
+ return REDIS_OK;
}
-void redisAppendCommand(redisContext *c, const char *format, ...) {
+int redisAppendCommand(redisContext *c, const char *format, ...) {
va_list ap;
+ int ret;
+
va_start(ap,format);
- redisvAppendCommand(c,format,ap);
+ ret = redisvAppendCommand(c,format,ap);
va_end(ap);
+ return ret;
}
-void redisAppendCommandArgv(redisContext *c, int argc, const char **argv, const size_t *argvlen) {
+int redisAppendCommandArgv(redisContext *c, int argc, const char **argv, const size_t *argvlen) {
char *cmd;
int len;
+
len = redisFormatCommandArgv(&cmd,argc,argv,argvlen);
- __redisAppendCommand(c,cmd,len);
+ if (len == -1) {
+ __redisSetError(c,REDIS_ERR_OOM,"Out of memory");
+ return REDIS_ERR;
+ }
+
+ if (__redisAppendCommand(c,cmd,len) != REDIS_OK) {
+ free(cmd);
+ return REDIS_ERR;
+ }
+
free(cmd);
+ return REDIS_OK;
}
/* Helper function for the redisCommand* family of functions.
* otherwise. When NULL is returned in a blocking context, the error field
* in the context will be set.
*/
-static void *__redisCommand(redisContext *c, char *cmd, size_t len) {
- void *aux = NULL;
- __redisAppendCommand(c,cmd,len);
+static void *__redisBlockForReply(redisContext *c) {
+ void *reply;
if (c->flags & REDIS_BLOCK) {
- if (redisGetReply(c,&aux) == REDIS_OK)
- return aux;
- return NULL;
+ if (redisGetReply(c,&reply) != REDIS_OK)
+ return NULL;
+ return reply;
}
return NULL;
}
void *redisvCommand(redisContext *c, const char *format, va_list ap) {
- char *cmd;
- int len;
- void *reply = NULL;
- len = redisvFormatCommand(&cmd,format,ap);
- reply = __redisCommand(c,cmd,len);
- free(cmd);
- return reply;
+ if (redisvAppendCommand(c,format,ap) != REDIS_OK)
+ return NULL;
+ return __redisBlockForReply(c);
}
void *redisCommand(redisContext *c, const char *format, ...) {
}
void *redisCommandArgv(redisContext *c, int argc, const char **argv, const size_t *argvlen) {
- char *cmd;
- int len;
- void *reply = NULL;
- len = redisFormatCommandArgv(&cmd,argc,argv,argvlen);
- reply = __redisCommand(c,cmd,len);
- free(cmd);
- return reply;
+ if (redisAppendCommandArgv(c,argc,argv,argvlen) != REDIS_OK)
+ return NULL;
+ return __redisBlockForReply(c);
}
projects / redis.git / blobdiff