removed a test that will never be true fixing the compilation on Linux

[redis.git] / src / t_string.c

diff --git a/src/t_string.c b/src/t_string.c
index 3b91f5e6d3392b2078c600b5c0f3c5d4debd79f5..736b1673d426cd469284a0e657f72eaa916dfa96 100644 (file)
--- a/src/t_string.c
+++ b/src/t_string.c
@@ -5,6 +5,14 @@
  * String Commands
  *----------------------------------------------------------------------------*/
 
  * 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 */
 void setGenericCommand(redisClient *c, int nx, robj *key, robj *val, robj *expire) {
     int retval;
     long seconds = 0; /* initialized to avoid an harmness warning */


@@ -88,10 +96,8 @@ static int getBitOffsetFromArgument(redisClient *c, robj *o, size_t *offset) {
     if (getLongLongFromObjectOrReply(c,o,&loffset,err) != REDIS_OK)
         return REDIS_ERR;
 
     if (getLongLongFromObjectOrReply(c,o,&loffset,err) != REDIS_OK)
         return REDIS_ERR;
 

-    /* Limit offset to SIZE_T_MAX or 512MB 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;
     {
         addReplyError(c,err);
         return REDIS_ERR;


@@ -172,6 +178,120 @@ void getbitCommand(redisClient *c) {
     addReply(c, on ? shared.cone : shared.czero);
 }
 
     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;
 
 void mgetCommand(redisClient *c) {
     int j;
 


@@ -315,50 +435,20 @@ void appendCommand(redisClient *c) {
     addReplyLongLong(c,totlen);
 }
 
     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;
 
 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");
+    }

 }
 }

+