cleanups: reduce variable scope

cppcheck pointed these out.

lib/base64.c

@@ -49,10 +49,10 @@ static size_t decodeQuantum(unsigned char *dest, const char *src)
 {
   size_t padding = 0;
   const char *s, *p;
-  unsigned long i, v, x = 0;
+  unsigned long i, x = 0;
 
   for(i = 0, s = src; i < 4; i++, s++) {
-    v = 0;
+    unsigned long v = 0;
 
     if(*s == '=') {
       x = (x << 6);
@@ -107,7 +107,6 @@ CURLcode Curl_base64_decode(const char *src,
   size_t length = 0;
   size_t padding = 0;
   size_t i;
-  size_t result;
   size_t numQuantums;
   size_t rawlen = 0;
   unsigned char *pos;
@@ -151,7 +150,7 @@ CURLcode Curl_base64_decode(const char *src,
 
   /* Decode the quantums */
   for(i = 0; i < numQuantums; i++) {
-    result = decodeQuantum(pos, src);
+    size_t result = decodeQuantum(pos, src);
     if(!result) {
       Curl_safefree(newstr);
 

lib/conncache.c

@@ -199,7 +199,6 @@ void Curl_conncache_foreach(struct conncache *connc,
   he = Curl_hash_next_element(&iter);
   while(he) {
     struct connectbundle *bundle;
-    struct connectdata *conn;
 
     bundle = he->ptr;
     he = Curl_hash_next_element(&iter);
@@ -208,7 +207,7 @@ void Curl_conncache_foreach(struct conncache *connc,
     while(curr) {
       /* Yes, we need to update curr before calling func(), because func()
          might decide to remove the connection */
-      conn = curr->ptr;
+      struct connectdata *conn = curr->ptr;
       curr = curr->next;
 
       if(1 == func(conn, param))
@@ -223,7 +222,6 @@ struct connectdata *
 Curl_conncache_find_first_connection(struct conncache *connc)
 {
   struct curl_hash_iterator iter;
-  struct curl_llist_element *curr;
   struct curl_hash_element *he;
   struct connectbundle *bundle;
 
@@ -231,6 +229,7 @@ Curl_conncache_find_first_connection(struct conncache *connc)
 
   he = Curl_hash_next_element(&iter);
   while(he) {
+    struct curl_llist_element *curr;
     bundle = he->ptr;
 
     curr = bundle->conn_list->head;

lib/connect.c

@@ -257,12 +257,6 @@ static CURLcode bindlocal(struct connectdata *conn,
   int portnum = data->set.localportrange;
   const char *dev = data->set.str[STRING_DEVICE];
   int error;
-  char myhost[256] = "";
-  int done = 0; /* -1 for error, 1 for address found */
-  bool is_interface = FALSE;
-  bool is_host = FALSE;
-  static const char *if_prefix = "if!";
-  static const char *host_prefix = "host!";
 
   /*************************************************************
    * Select device to bind socket to
@@ -274,6 +268,13 @@ static CURLcode bindlocal(struct connectdata *conn,
   memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
 
   if(dev && (strlen(dev)<255) ) {
+    char myhost[256] = "";
+    int done = 0; /* -1 for error, 1 for address found */
+    bool is_interface = FALSE;
+    bool is_host = FALSE;
+    static const char *if_prefix = "if!";
+    static const char *host_prefix = "host!";
+
     if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
       dev += strlen(if_prefix);
       is_interface = TRUE;
@@ -656,7 +657,6 @@ static bool getaddressinfo(struct sockaddr* sa, char* addr,
    connection */
 void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd)
 {
-  int error;
   curl_socklen_t len;
   struct Curl_sockaddr_storage ssrem;
   struct Curl_sockaddr_storage ssloc;
@@ -667,6 +667,7 @@ void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd)
     return;
 
   if(!conn->bits.reuse) {
+    int error;
 
     len = sizeof(struct Curl_sockaddr_storage);
     if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
@@ -813,10 +814,10 @@ CURLcode Curl_is_connected(struct connectdata *conn,
      * address" for the given host. But first remember the latest error.
      */
     if(error) {
-      char ipaddress[MAX_IPADR_LEN];
       data->state.os_errno = error;
       SET_SOCKERRNO(error);
       if(conn->tempaddr[i]) {
+        char ipaddress[MAX_IPADR_LEN];
         Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN);
         infof(data, "connect to %s port %ld failed: %s\n",
               ipaddress, conn->port, Curl_strerror(conn, error));