Remove warnings and improve integer sign correctness.

src/anet.c

@@ -117,6 +117,8 @@ int anetKeepAlive(char *err, int fd, int interval)
         anetSetError(err, "setsockopt TCP_KEEPCNT: %s\n", strerror(errno));
         return ANET_ERR;
     }
+#else
+    ((void) interval); /* Avoid unused var warning for non Linux systems. */
 #endif
 
     return ANET_OK;

src/aof.c

@@ -95,6 +95,10 @@ void aofChildWriteDiffData(aeEventLoop *el, int fd, void *privdata, int mask) {
     listNode *ln;
     aofrwblock *block;
     ssize_t nwritten;
+    REDIS_NOTUSED(el);
+    REDIS_NOTUSED(fd);
+    REDIS_NOTUSED(privdata);
+    REDIS_NOTUSED(mask);
 
     while(1) {
         ln = listFirst(server.aof_rewrite_buf_blocks);
@@ -177,7 +181,7 @@ ssize_t aofRewriteBufferWrite(int fd) {
 
         if (block->used) {
             nwritten = write(fd,block->buf,block->used);
-            if (nwritten != block->used) {
+            if (nwritten != (ssize_t)block->used) {
                 if (nwritten == 0) errno = EIO;
                 return -1;
             }
@@ -1128,6 +1132,9 @@ int rewriteAppendOnlyFile(char *filename) {
  * parent sends a '!' as well to acknowledge. */
 void aofChildPipeReadable(aeEventLoop *el, int fd, void *privdata, int mask) {
     char byte;
+    REDIS_NOTUSED(el);
+    REDIS_NOTUSED(privdata);
+    REDIS_NOTUSED(mask);
 
     if (read(fd,&byte,1) == 1 && byte == '!') {
         redisLog(REDIS_NOTICE,"AOF rewrite child asks to stop sending diffs.");

src/bitops.c

@@ -107,12 +107,12 @@ size_t redisPopcount(void *s, long count) {
  * no zero bit is found, it returns count*8 assuming the string is zero
  * padded on the right. However if 'bit' is 1 it is possible that there is
  * not a single set bit in the bitmap. In this special case -1 is returned. */
-long redisBitpos(void *s, long count, int bit) {
+long redisBitpos(void *s, unsigned long count, int bit) {
     unsigned long *l;
     unsigned char *c;
     unsigned long skipval, word = 0, one;
     long pos = 0; /* Position of bit, to return to the caller. */
-    int j;
+    unsigned long j;
 
     /* Process whole words first, seeking for first word that is not
      * all ones or all zeros respectively if we are lookig for zeros
@@ -276,11 +276,12 @@ void getbitCommand(redisClient *c) {
 void bitopCommand(redisClient *c) {
     char *opname = c->argv[1]->ptr;
     robj *o, *targetkey = c->argv[2];
-    long op, j, numkeys;
+    unsigned long op, j, numkeys;
     robj **objects;      /* Array of source objects. */
     unsigned char **src; /* Array of source strings pointers. */
-    long *len, maxlen = 0; /* Array of length of src strings, and max len. */
-    long minlen = 0;    /* Min len among the input keys. */
+    unsigned long *len, maxlen = 0; /* Array of length of src strings,
+                                       and max len. */
+    unsigned long minlen = 0;    /* Min len among the input keys. */
     unsigned char *res = NULL; /* Resulting string. */
 
     /* Parse the operation name. */
@@ -320,9 +321,10 @@ void bitopCommand(redisClient *c) {
         }
         /* Return an error if one of the keys is not a string. */
         if (checkType(c,o,REDIS_STRING)) {
-            for (j = j-1; j >= 0; j--) {
-                if (objects[j])
-                    decrRefCount(objects[j]);
+            unsigned long i;
+            for (i = 0; i < j; i++) {
+                if (objects[i])
+                    decrRefCount(objects[i]);
             }
             zfree(src);
             zfree(len);
@@ -340,7 +342,7 @@ void bitopCommand(redisClient *c) {
     if (maxlen) {
         res = (unsigned char*) sdsnewlen(NULL,maxlen);
         unsigned char output, byte;
-        long i;
+        unsigned long i;
 
         /* Fast path: as far as we have data for all the input bitmaps we
          * can take a fast path that performs much better than the

src/cluster.c

@@ -323,7 +323,7 @@ int clusterSaveConfig(int do_fsync) {
 
     /* Pad the new payload if the existing file length is greater. */
     if (fstat(fd,&sb) != -1) {
-        if (sb.st_size > content_size) {
+        if (sb.st_size > (off_t)content_size) {
             ci = sdsgrowzero(ci,sb.st_size);
             memset(ci+content_size,'\n',sb.st_size-content_size);
         }
@@ -1907,7 +1907,7 @@ void clusterReadHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
     ssize_t nread;
     clusterMsg *hdr;
     clusterLink *link = (clusterLink*) privdata;
-    int readlen, rcvbuflen;
+    unsigned int readlen, rcvbuflen;
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(mask);
 
@@ -3982,7 +3982,7 @@ void clusterCommand(redisClient *c) {
                 "configEpoch set to %llu via CLUSTER SET-CONFIG-EPOCH",
                 (unsigned long long) myself->configEpoch);
 
-            if (server.cluster->currentEpoch < epoch)
+            if (server.cluster->currentEpoch < (uint64_t)epoch)
                 server.cluster->currentEpoch = epoch;
             /* No need to fsync the config here since in the unlucky event
              * of a failure to persist the config, the conflict resolution code

src/config.c

@@ -629,7 +629,7 @@ void configSetCommand(redisClient *c) {
                 server.maxclients = orig_value;
                 return;
             }
-            if (aeGetSetSize(server.el) <
+            if ((unsigned int) aeGetSetSize(server.el) <
                 server.maxclients + REDIS_EVENTLOOP_FDSET_INCR)
             {
                 if (aeResizeSetSize(server.el,

src/db.c

@@ -421,9 +421,7 @@ int parseScanCursorOrReply(redisClient *c, robj *o, unsigned long *cursor) {
  * In the case of a Hash object the function returns both the field and value
  * of every element on the Hash. */
 void scanGenericCommand(redisClient *c, robj *o, unsigned long cursor) {
-    int rv;
     int i, j;
-    char buf[REDIS_LONGSTR_SIZE];
     list *keys = listCreate();
     listNode *node, *nextnode;
     long count = 10;
@@ -503,7 +501,7 @@ void scanGenericCommand(redisClient *c, robj *o, unsigned long cursor) {
         privdata[1] = o;
         do {
             cursor = dictScan(ht, cursor, scanCallback, privdata);
-        } while (cursor && listLength(keys) < count);
+        } while (cursor && listLength(keys) < (unsigned long)count);
     } else if (o->type == REDIS_SET) {
         int pos = 0;
         int64_t ll;
@@ -577,9 +575,7 @@ void scanGenericCommand(redisClient *c, robj *o, unsigned long cursor) {
 
     /* Step 4: Reply to the client. */
     addReplyMultiBulkLen(c, 2);
-    rv = snprintf(buf, sizeof(buf), "%lu", cursor);
-    redisAssert(rv < sizeof(buf));
-    addReplyBulkCBuffer(c, buf, rv);
+    addReplyBulkLongLong(c,cursor);
 
     addReplyMultiBulkLen(c, listLength(keys));
     while ((node = listFirst(keys)) != NULL) {

src/dict.c

@@ -668,9 +668,9 @@ dictEntry *dictGetRandomKey(dict *d)
  * statistics. However the function is much faster than dictGetRandomKey()
  * at producing N elements, and the elements are guaranteed to be non
  * repeating. */
-int dictGetRandomKeys(dict *d, dictEntry **des, int count) {
+unsigned int dictGetRandomKeys(dict *d, dictEntry **des, unsigned int count) {
     int j; /* internal hash table id, 0 or 1. */
-    int stored = 0;
+    unsigned int stored = 0;
 
     if (dictSize(d) < count) count = dictSize(d);
     while(stored < count) {

src/dict.h

@@ -162,7 +162,7 @@ dictIterator *dictGetSafeIterator(dict *d);
 dictEntry *dictNext(dictIterator *iter);
 void dictReleaseIterator(dictIterator *iter);
 dictEntry *dictGetRandomKey(dict *d);
-int dictGetRandomKeys(dict *d, dictEntry **des, int count);
+unsigned int dictGetRandomKeys(dict *d, dictEntry **des, unsigned int count);
 void dictPrintStats(dict *d);
 unsigned int dictGenHashFunction(const void *key, int len);
 unsigned int dictGenCaseHashFunction(const unsigned char *buf, int len);

src/hyperloglog.c

@@ -1349,7 +1349,7 @@ void pfmergeCommand(redisClient *c) {
  * Something that is not easy to test from within the outside. */
 #define HLL_TEST_CYCLES 1000
 void pfselftestCommand(redisClient *c) {
-    int j, i;
+    unsigned int j, i;
     sds bitcounters = sdsnewlen(NULL,HLL_DENSE_SIZE);
     struct hllhdr *hdr = (struct hllhdr*) bitcounters, *hdr2;
     robj *o = NULL;
@@ -1431,7 +1431,7 @@ void pfselftestCommand(redisClient *c) {
             if (j == 10) maxerr = 1;
 
             if (abserr < 0) abserr = -abserr;
-            if (abserr > maxerr) {
+            if (abserr > (int64_t)maxerr) {
                 addReplyErrorFormat(c,
                     "TESTFAILED Too big error. card:%llu abserr:%llu",
                     (unsigned long long) checkpoint,

src/latency.c

@@ -37,6 +37,7 @@
 
 /* Dictionary type for latency events. */
 int dictStringKeyCompare(void *privdata, const void *key1, const void *key2) {
+    REDIS_NOTUSED(privdata);
     return strcmp(key1,key2) == 0;
 }
 

src/networking.c

@@ -1051,7 +1051,7 @@ int processMultibulkBuffer(redisClient *c) {
                 qblen = sdslen(c->querybuf);
                 /* Hint the sds library about the amount of bytes this string is
                  * going to contain. */
-                if (qblen < ll+2)
+                if (qblen < (size_t)ll+2)
                     c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2-qblen);
             }
             c->bulklen = ll;

src/redis-benchmark.c

@@ -213,7 +213,7 @@ static void readHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
                 freeReplyObject(reply);
 
                 if (c->selectlen) {
-                    int j;
+                    size_t j;
 
                     /* This is the OK from SELECT. Just discard the SELECT
                      * from the buffer. */
@@ -359,7 +359,7 @@ static client createClient(char *cmd, size_t len, client from) {
             c->randfree = 0;
             c->randptr = zmalloc(sizeof(char*)*c->randlen);
             /* copy the offsets. */
-            for (j = 0; j < c->randlen; j++) {
+            for (j = 0; j < (int)c->randlen; j++) {
                 c->randptr[j] = c->obuf + (from->randptr[j]-from->obuf);
                 /* Adjust for the different select prefix length. */
                 c->randptr[j] += c->selectlen - from->selectlen;

src/redis-cli.c

@@ -1416,7 +1416,7 @@ static int toIntType(char *key, char *type) {
 
 static void getKeyTypes(redisReply *keys, int *types) {
     redisReply *reply;
-    int i;
+    unsigned int i;
 
     /* Pipeline TYPE commands */
     for(i=0;i<keys->elements;i++) {
@@ -1445,7 +1445,7 @@ static void getKeySizes(redisReply *keys, int *types,
 {
     redisReply *reply;
     char *sizecmds[] = {"STRLEN","LLEN","SCARD","HLEN","ZCARD"};
-    int i;
+    unsigned int i;
 
     /* Pipeline size commands */
     for(i=0;i<keys->elements;i++) {
@@ -1492,7 +1492,8 @@ static void findBigKeys(void) {
     char *typename[] = {"string","list","set","hash","zset"};
     char *typeunit[] = {"bytes","items","members","fields","members"};
     redisReply *reply, *keys;
-    int type, *types=NULL, arrsize=0, i;
+    unsigned int arrsize=0, i;
+    int type, *types=NULL;
     double pct;
 
     /* Total keys pre scanning */
@@ -1779,7 +1780,7 @@ static void scanMode(void) {
             printf("ERROR: %s\n", reply->str);
             exit(1);
         } else {
-            int j;
+            unsigned int j;
 
             cur = strtoull(reply->element[0]->str,NULL,10);
             for (j = 0; j < reply->element[1]->elements; j++)

src/redis.c

@@ -760,8 +760,8 @@ void activeExpireCycle(int type) {
     static int timelimit_exit = 0;      /* Time limit hit in previous call? */
     static long long last_fast_cycle = 0; /* When last fast cycle ran. */
 
-    unsigned int j, iteration = 0;
-    unsigned int dbs_per_call = REDIS_DBCRON_DBS_PER_CALL;
+    int j, iteration = 0;
+    int dbs_per_call = REDIS_DBCRON_DBS_PER_CALL;
     long long start = ustime(), timelimit;
 
     if (type == ACTIVE_EXPIRE_CYCLE_FAST) {
@@ -1000,8 +1000,8 @@ void databasesCron(void) {
          * cron loop iteration. */
         static unsigned int resize_db = 0;
         static unsigned int rehash_db = 0;
-        unsigned int dbs_per_call = REDIS_DBCRON_DBS_PER_CALL;
-        unsigned int j;
+        int dbs_per_call = REDIS_DBCRON_DBS_PER_CALL;
+        int j;
 
         /* Don't test more DBs than we have. */
         if (dbs_per_call > server.dbnum) dbs_per_call = server.dbnum;
@@ -1557,7 +1557,7 @@ void adjustOpenFilesLimit(void) {
              * to the higher value supported less than maxfiles. */
             f = maxfiles;
             while(f > oldlimit) {
-                int decr_step = 16;
+                rlim_t decr_step = 16;
 
                 limit.rlim_cur = f;
                 limit.rlim_max = f;
@@ -2359,9 +2359,9 @@ int time_independent_strcmp(char *a, char *b) {
      * a or b are fixed (our password) length, and the difference is only
      * relative to the length of the user provided string, so no information
      * leak is possible in the following two lines of code. */
-    int alen = strlen(a);
-    int blen = strlen(b);
-    int j;
+    unsigned int alen = strlen(a);
+    unsigned int blen = strlen(b);
+    unsigned int j;
     int diff = 0;
 
     /* We can't compare strings longer than our static buffers.

src/redis.h

@@ -814,12 +814,12 @@ struct redisServer {
     /* Replication script cache. */
     dict *repl_scriptcache_dict;        /* SHA1 all slaves are aware of. */
     list *repl_scriptcache_fifo;        /* First in, first out LRU eviction. */
-    int repl_scriptcache_size;          /* Max number of elements. */
+    unsigned int repl_scriptcache_size; /* Max number of elements. */
     /* Synchronous replication. */
     list *clients_waiting_acks;         /* Clients waiting in WAIT command. */
     int get_ack_from_slaves;            /* If true we send REPLCONF GETACK. */
     /* Limits */
-    int maxclients;                 /* Max number of simultaneous clients */
+    unsigned int maxclients;            /* Max number of simultaneous clients */
     unsigned long long maxmemory;   /* Max number of memory bytes to use */
     int maxmemory_policy;           /* Policy for key eviction */
     int maxmemory_samples;          /* Pricision of random sampling */

src/scripting.c

@@ -212,7 +212,7 @@ int luaRedisGenericCommand(lua_State *lua, int raise_error) {
     static robj **argv = NULL;
     static int argv_size = 0;
     static robj *cached_objects[LUA_CMD_OBJCACHE_SIZE];
-    static int cached_objects_len[LUA_CMD_OBJCACHE_SIZE];
+    static size_t cached_objects_len[LUA_CMD_OBJCACHE_SIZE];
 
     /* Require at least one argument */
     if (argc == 0) {