* String Commands
*----------------------------------------------------------------------------*/
+static int checkStringLength(redisClient *c, long long size) {
+ if (size > 512*1024*1024) {
+ addReplyError(c,"string exceeds maximum allowed size (512MB)");
+ return REDIS_ERR;
+ }
+ return REDIS_OK;
+}
+
void setGenericCommand(redisClient *c, int nx, robj *key, robj *val, robj *expire) {
int retval;
long seconds = 0; /* initialized to avoid an harmness warning */
if (getLongLongFromObjectOrReply(c,o,&loffset,err) != REDIS_OK)
return REDIS_ERR;
- /* Limit offset to SIZE_T_MAX or 1GB in bytes */
- if ((loffset < 0) ||
- ((unsigned long long)loffset >= (unsigned)SIZE_T_MAX) ||
- ((unsigned long long)loffset >> 3) >= (512*1024*1024))
+ /* Limit offset to 512MB in bytes */
+ if ((loffset < 0) || ((unsigned long long)loffset >> 3) >= (512*1024*1024))
{
addReplyError(c,err);
return REDIS_ERR;
byte = bitoffset >> 3;
bit = 7 - (bitoffset & 0x7);
on = bitvalue & 0x1;
- o->ptr = sdsgrowsafe(o->ptr,byte+1);
+ o->ptr = sdsgrowzero(o->ptr,byte+1);
((char*)o->ptr)[byte] |= on << bit;
((char*)o->ptr)[byte] &= ~((!on) << bit);
addReply(c, on ? shared.cone : shared.czero);
}
+void setrangeCommand(redisClient *c) {
+ robj *o;
+ long offset;
+ sds value = c->argv[3]->ptr;
+
+ if (getLongFromObjectOrReply(c,c->argv[2],&offset,NULL) != REDIS_OK)
+ return;
+
+ o = lookupKeyWrite(c->db,c->argv[1]);
+ if (o == NULL) {
+ /* Negative offset is always 0 for non-existing keys */
+ if (offset < 0) offset = 0;
+
+ /* Return 0 when setting nothing on a non-existing string */
+ if (sdslen(value) == 0) {
+ addReply(c,shared.czero);
+ return;
+ }
+
+ /* Return when the resulting string exceeds allowed size */
+ if (checkStringLength(c,offset+sdslen(value)) != REDIS_OK)
+ return;
+
+ o = createObject(REDIS_STRING,sdsempty());
+ dbAdd(c->db,c->argv[1],o);
+ } else {
+ int olen;
+
+ /* Key exists, check type */
+ if (checkType(c,o,REDIS_STRING))
+ return;
+
+ /* Find out existing value length */
+ if (o->encoding == REDIS_ENCODING_INT) {
+ char llbuf[32];
+ olen = ll2string(llbuf,sizeof(llbuf),(long)o->ptr);
+ } else {
+ olen = sdslen(o->ptr);
+ }
+
+ /* Return existing string length when setting nothing */
+ if (sdslen(value) == 0) {
+ addReplyLongLong(c,olen);
+ return;
+ }
+
+ /* Convert negative indexes. Note that for SETRANGE, the meaning of a
+ * negative index is a little different than for other commands.
+ * Here, an offset of -1 points to the trailing NULL byte of the
+ * string instead of the last character. */
+ if (offset < 0) {
+ offset = olen+1+offset;
+ if (offset < 0) offset = 0;
+ }
+
+ /* Return when the resulting string exceeds allowed size */
+ if (checkStringLength(c,offset+sdslen(value)) != REDIS_OK)
+ return;
+
+ /* Create a copy when the object is shared or encoded. */
+ if (o->refcount != 1 || o->encoding != REDIS_ENCODING_RAW) {
+ robj *decoded = getDecodedObject(o);
+ o = createStringObject(decoded->ptr, sdslen(decoded->ptr));
+ decrRefCount(decoded);
+ dbReplace(c->db,c->argv[1],o);
+ }
+ }
+
+ if (sdslen(value) > 0) {
+ o->ptr = sdsgrowzero(o->ptr,offset+sdslen(value));
+ memcpy((char*)o->ptr+offset,value,sdslen(value));
+ touchWatchedKey(c->db,c->argv[1]);
+ server.dirty++;
+ }
+ addReplyLongLong(c,sdslen(o->ptr));
+}
+
+void getrangeCommand(redisClient *c) {
+ robj *o;
+ long start, end;
+ char *str, llbuf[32];
+ size_t strlen;
+
+ if (getLongFromObjectOrReply(c,c->argv[2],&start,NULL) != REDIS_OK)
+ return;
+ if (getLongFromObjectOrReply(c,c->argv[3],&end,NULL) != REDIS_OK)
+ return;
+ if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
+ checkType(c,o,REDIS_STRING)) return;
+
+ if (o->encoding == REDIS_ENCODING_INT) {
+ str = llbuf;
+ strlen = ll2string(llbuf,sizeof(llbuf),(long)o->ptr);
+ } else {
+ str = o->ptr;
+ strlen = sdslen(str);
+ }
+
+ /* Convert negative indexes */
+ if (start < 0) start = strlen+start;
+ if (end < 0) end = strlen+end;
+ if (start < 0) start = 0;
+ if (end < 0) end = 0;
+ if ((unsigned)end >= strlen) end = strlen-1;
+
+ /* Precondition: end >= 0 && end < strlen, so the only condition where
+ * nothing can be returned is: start > end. */
+ if (start > end) {
+ addReply(c,shared.nullbulk);
+ } else {
+ addReplyBulkCBuffer(c,(char*)str+start,end-start+1);
+ }
+}
+
void mgetCommand(redisClient *c) {
int j;
addReplyLongLong(c,totlen);
}
-void substrCommand(redisClient *c) {
- robj *o;
- long start = atoi(c->argv[2]->ptr);
- long end = atoi(c->argv[3]->ptr);
- size_t rangelen, strlen;
- sds range;
-
- if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
- checkType(c,o,REDIS_STRING)) return;
-
- o = getDecodedObject(o);
- strlen = sdslen(o->ptr);
-
- /* convert negative indexes */
- if (start < 0) start = strlen+start;
- if (end < 0) end = strlen+end;
- if (start < 0) start = 0;
- if (end < 0) end = 0;
-
- /* indexes sanity checks */
- if (start > end || (size_t)start >= strlen) {
- /* Out of range start or start > end result in null reply */
- addReply(c,shared.nullbulk);
- decrRefCount(o);
- return;
- }
- if ((size_t)end >= strlen) end = strlen-1;
- rangelen = (end-start)+1;
-
- /* Return the result */
- addReplySds(c,sdscatprintf(sdsempty(),"$%zu\r\n",rangelen));
- range = sdsnewlen((char*)o->ptr+start,rangelen);
- addReplySds(c,range);
- addReply(c,shared.crlf);
- decrRefCount(o);
-}
-
void strlenCommand(redisClient *c) {
robj *o;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,o,REDIS_STRING)) return;
- o = getDecodedObject(o);
- addReplyLongLong(c,sdslen(o->ptr));
- decrRefCount(o);
+ if (o->encoding == REDIS_ENCODING_RAW) {
+ addReplyLongLong(c,sdslen(o->ptr));
+ } else if (o->encoding == REDIS_ENCODING_INT) {
+ char llbuf[32];
+ int len = ll2string(llbuf,sizeof(llbuf),(long)o->ptr);
+ addReplyLongLong(c,len);
+ } else {
+ redisPanic("Unknown string encoding");
+ }
}
+
projects / redis.git / blobdiff