build: fix Codacy warnings

Reduce variable scopes and remove redundant variable stores.

Closes curl#3975

CMake/CurlTests.c

@@ -125,13 +125,15 @@ int main(void)
 #if   defined(HAVE_GETHOSTBYADDR_R_5) || \
       defined(HAVE_GETHOSTBYADDR_R_5_REENTRANT)
   rc = gethostbyaddr_r(address, length, type, &h, &hdata);
+  (void)rc;
 #elif defined(HAVE_GETHOSTBYADDR_R_7) || \
       defined(HAVE_GETHOSTBYADDR_R_7_REENTRANT)
   hp = gethostbyaddr_r(address, length, type, &h, buffer, 8192, &h_errnop);
   (void)hp;
 #elif defined(HAVE_GETHOSTBYADDR_R_8) || \
       defined(HAVE_GETHOSTBYADDR_R_8_REENTRANT)
   rc = gethostbyaddr_r(address, length, type, &h, buffer, 8192, &hp, &h_errnop);
+  (void)rc;
 #endif
 
 #if   defined(HAVE_GETHOSTBYNAME_R_3) || \

docs/examples/ftp-wildcard.c

@@ -41,16 +41,14 @@ static size_t write_it(char *buff, size_t size, size_t nmemb,
 
 int main(int argc, char **argv)
 {
-  int rc = CURLE_OK;
-
   /* curl easy handle */
   CURL *handle;
 
   /* help data */
   struct callback_data data = { 0 };
 
   /* global initialization */
-  rc = curl_global_init(CURL_GLOBAL_ALL);
+  int rc = curl_global_init(CURL_GLOBAL_ALL);
   if(rc)
     return rc;
 

docs/examples/synctime.c

@@ -137,7 +137,6 @@ size_t SyncTime_CURL_WriteOutput(void *ptr, size_t size, size_t nmemb,
 size_t SyncTime_CURL_WriteHeader(void *ptr, size_t size, size_t nmemb,
                                  void *stream)
 {
-  int   i, RetVal;
   char  TmpStr1[26], TmpStr2[26];
 
   (void)stream;
@@ -156,11 +155,13 @@ size_t SyncTime_CURL_WriteHeader(void *ptr, size_t size, size_t nmemb,
                                          TmpStr1 & 2? */
         AutoSyncTime = 0;
       else {
-        RetVal = sscanf((char *)(ptr), "Date: %s %hu %s %hu %hu:%hu:%hu",
-                        TmpStr1, &SYSTime.wDay, TmpStr2, &SYSTime.wYear,
-                        &SYSTime.wHour, &SYSTime.wMinute, &SYSTime.wSecond);
+        int RetVal = sscanf((char *)(ptr), "Date: %s %hu %s %hu %hu:%hu:%hu",
+                            TmpStr1, &SYSTime.wDay, TmpStr2, &SYSTime.wYear,
+                            &SYSTime.wHour, &SYSTime.wMinute,
+                            &SYSTime.wSecond);
 
         if(RetVal == 7) {
+          int i;
           SYSTime.wMilliseconds = 500;    /* adjust to midpoint, 0.5 sec */
           for(i = 0; i<12; i++) {
             if(strcmp(MthStr[i], TmpStr2) == 0) {

lib/curl_ntlm_core.c

@@ -218,7 +218,6 @@ static bool encrypt_des(const unsigned char *in, unsigned char *out,
                         const unsigned char *key_56)
 {
   const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
-  PK11SlotInfo *slot = NULL;
   char key[8];                                /* expanded 64 bit key */
   SECItem key_item;
   PK11SymKey *symkey = NULL;
@@ -228,7 +227,7 @@ static bool encrypt_des(const unsigned char *in, unsigned char *out,
   bool rv = FALSE;
 
   /* use internal slot for DES encryption (requires NSS to be initialized) */
-  slot = PK11_GetInternalKeySlot();
+  PK11SlotInfo *slot = PK11_GetInternalKeySlot();
   if(!slot)
     return FALSE;
 

lib/ftp.c

@@ -565,10 +565,8 @@ static CURLcode ftp_readresp(curl_socket_t sockfd,
 #ifdef HAVE_GSSAPI
   char * const buf = data->state.buffer;
 #endif
-  CURLcode result = CURLE_OK;
   int code;
-
-  result = Curl_pp_readresp(sockfd, pp, &code, size);
+  CURLcode result = Curl_pp_readresp(sockfd, pp, &code, size);
 
 #if defined(HAVE_GSSAPI)
   /* handle the security-oriented responses 6xx ***/
@@ -1499,24 +1497,14 @@ static CURLcode ftp_state_list(struct connectdata *conn)
 
 static CURLcode ftp_state_retr_prequote(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* We've sent the TYPE, now we must send the list of prequote strings */
-
-  result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
-
-  return result;
+  return ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
 }
 
 static CURLcode ftp_state_stor_prequote(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* We've sent the TYPE, now we must send the list of prequote strings */
-
-  result = ftp_state_quote(conn, TRUE, FTP_STOR_PREQUOTE);
-
-  return result;
+  return ftp_state_quote(conn, TRUE, FTP_STOR_PREQUOTE);
 }
 
 static CURLcode ftp_state_type(struct connectdata *conn)

lib/imap.c

@@ -444,10 +444,8 @@ static CURLcode imap_perform_capability(struct connectdata *conn)
  */
 static CURLcode imap_perform_starttls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the STARTTLS command */
-  result = imap_sendf(conn, "STARTTLS");
+  CURLcode result = imap_sendf(conn, "STARTTLS");
 
   if(!result)
     state(conn, IMAP_STARTTLS);
@@ -463,11 +461,10 @@ static CURLcode imap_perform_starttls(struct connectdata *conn)
  */
 static CURLcode imap_perform_upgrade_tls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-  struct imap_conn *imapc = &conn->proto.imapc;
-
   /* Start the SSL connection */
-  result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &imapc->ssldone);
+  struct imap_conn *imapc = &conn->proto.imapc;
+  CURLcode result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET,
+                                                 &imapc->ssldone);
 
   if(!result) {
     if(imapc->state != IMAP_UPGRADETLS)
@@ -826,10 +823,8 @@ static CURLcode imap_perform_search(struct connectdata *conn)
  */
 static CURLcode imap_perform_logout(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the LOGOUT command */
-  result = imap_sendf(conn, "LOGOUT");
+  CURLcode result = imap_sendf(conn, "LOGOUT");
 
   if(!result)
     state(conn, IMAP_LOGOUT);

lib/pop3.c

@@ -339,10 +339,8 @@ static CURLcode pop3_perform_capa(struct connectdata *conn)
  */
 static CURLcode pop3_perform_starttls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the STLS command */
-  result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", "STLS");
+  CURLcode result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", "STLS");
 
   if(!result)
     state(conn, POP3_STARTTLS);
@@ -358,11 +356,10 @@ static CURLcode pop3_perform_starttls(struct connectdata *conn)
  */
 static CURLcode pop3_perform_upgrade_tls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-  struct pop3_conn *pop3c = &conn->proto.pop3c;
-
   /* Start the SSL connection */
-  result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &pop3c->ssldone);
+  struct pop3_conn *pop3c = &conn->proto.pop3c;
+  CURLcode result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET,
+                                                 &pop3c->ssldone);
 
   if(!result) {
     if(pop3c->state != POP3_UPGRADETLS)
@@ -593,10 +590,8 @@ static CURLcode pop3_perform_command(struct connectdata *conn)
  */
 static CURLcode pop3_perform_quit(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the QUIT command */
-  result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", "QUIT");
+  CURLcode result = Curl_pp_sendf(&conn->proto.pop3c.pp, "%s", "QUIT");
 
   if(!result)
     state(conn, POP3_QUIT);

lib/smb.c

@@ -957,15 +957,15 @@ static CURLcode smb_do(struct connectdata *conn, bool *done)
 
 static CURLcode smb_parse_url_path(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
   struct Curl_easy *data = conn->data;
   struct smb_request *req = data->req.protop;
   struct smb_conn *smbc = &conn->proto.smbc;
   char *path;
   char *slash;
 
   /* URL decode the path */
-  result = Curl_urldecode(data, data->state.up.path, 0, &path, NULL, TRUE);
+  CURLcode result = Curl_urldecode(data, data->state.up.path, 0, &path, NULL,
+                                   TRUE);
   if(result)
     return result;
 

lib/smtp.c

@@ -359,10 +359,8 @@ static CURLcode smtp_perform_helo(struct connectdata *conn)
  */
 static CURLcode smtp_perform_starttls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the STARTTLS command */
-  result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "STARTTLS");
+  CURLcode result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "STARTTLS");
 
   if(!result)
     state(conn, SMTP_STARTTLS);
@@ -378,11 +376,10 @@ static CURLcode smtp_perform_starttls(struct connectdata *conn)
  */
 static CURLcode smtp_perform_upgrade_tls(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-  struct smtp_conn *smtpc = &conn->proto.smtpc;
-
   /* Start the SSL connection */
-  result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
+  struct smtp_conn *smtpc = &conn->proto.smtpc;
+  CURLcode result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET,
+                                                 &smtpc->ssldone);
 
   if(!result) {
     if(smtpc->state != SMTP_UPGRADETLS)
@@ -645,10 +642,8 @@ static CURLcode smtp_perform_rcpt_to(struct connectdata *conn)
  */
 static CURLcode smtp_perform_quit(struct connectdata *conn)
 {
-  CURLcode result = CURLE_OK;
-
   /* Send the QUIT command */
-  result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "QUIT");
+  CURLcode result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "QUIT");
 
   if(!result)
     state(conn, SMTP_QUIT);

lib/ssh-libssh.c

@@ -1968,11 +1968,10 @@ static CURLcode myssh_multi_statemach(struct connectdata *conn,
                                       bool *done)
 {
   struct ssh_conn *sshc = &conn->proto.sshc;
-  CURLcode result = CURLE_OK;
   bool block;    /* we store the status and use that to provide a ssh_getsock()
                     implementation */
+  CURLcode result = myssh_statemach_act(conn, &block);
 
-  result = myssh_statemach_act(conn, &block);
   *done = (sshc->state == SSH_STOP) ? TRUE : FALSE;
   myssh_block2waitfor(conn, block);
 

lib/vauth/digest.c

@@ -357,7 +357,6 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
                                              const char *service,
                                              char **outptr, size_t *outlen)
 {
-  CURLcode result = CURLE_OK;
   size_t i;
   MD5_context *ctxt;
   char *response = NULL;
@@ -377,10 +376,12 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
   char *spn         = NULL;
 
   /* Decode the challenge message */
-  result = auth_decode_digest_md5_message(chlg64, nonce, sizeof(nonce),
-                                          realm, sizeof(realm),
-                                          algorithm, sizeof(algorithm),
-                                          qop_options, sizeof(qop_options));
+  CURLcode result = auth_decode_digest_md5_message(chlg64, nonce,
+                                                   sizeof(nonce), realm,
+                                                   sizeof(realm), algorithm,
+                                                   sizeof(algorithm),
+                                                   qop_options,
+                                                   sizeof(qop_options));
   if(result)
     return result;
 

lib/vtls/cyassl.c

@@ -357,9 +357,8 @@ cyassl_connect_step1(struct connectdata *conn,
 
   /* give application a chance to interfere with SSL set up. */
   if(data->set.ssl.fsslctx) {
-    CURLcode result = CURLE_OK;
-    result = (*data->set.ssl.fsslctx)(data, BACKEND->ctx,
-                                      data->set.ssl.fsslctxp);
+    CURLcode result = (*data->set.ssl.fsslctx)(data, BACKEND->ctx,
+                                               data->set.ssl.fsslctxp);
     if(result) {
       failf(data, "error signaled by ssl ctx callback");
       return result;

lib/vtls/mesalink.c

@@ -265,14 +265,14 @@ mesalink_connect_step2(struct connectdata *conn, int sockindex)
 
   ret = SSL_connect(BACKEND->handle);
   if(ret != SSL_SUCCESS) {
-    char error_buffer[MESALINK_MAX_ERROR_SZ];
     int detail = SSL_get_error(BACKEND->handle, ret);
 
     if(SSL_ERROR_WANT_CONNECT == detail || SSL_ERROR_WANT_READ == detail) {
       connssl->connecting_state = ssl_connect_2_reading;
       return CURLE_OK;
     }
     else {
+      char error_buffer[MESALINK_MAX_ERROR_SZ];
       failf(data,
             "SSL_connect failed with error %d: %s",
             detail,

packages/OS400/ccsidcurl.c

@@ -620,12 +620,7 @@ curl_easy_getinfo_ccsid(CURL *curl, CURLINFO info, ...)
   va_list arg;
   void *paramp;
   CURLcode ret;
-  unsigned int ccsid;
-  char * * cpp;
   struct Curl_easy * data;
-  struct curl_slist * * slp;
-  struct curl_certinfo * cipf;
-  struct curl_certinfo * cipt;
 
   /* WARNING: unlike curl_easy_getinfo(), the strings returned by this
      procedure have to be free'ed. */
@@ -635,7 +630,13 @@ curl_easy_getinfo_ccsid(CURL *curl, CURLINFO info, ...)
   paramp = va_arg(arg, void *);
   ret = Curl_getinfo(data, info, paramp);
 
-  if(ret == CURLE_OK)
+  if(ret == CURLE_OK) {
+    unsigned int ccsid;
+    char **cpp;
+    struct curl_slist **slp;
+    struct curl_certinfo *cipf;
+    struct curl_certinfo *cipt;
+
     switch((int) info & CURLINFO_TYPEMASK) {
 
     case CURLINFO_STRING:
@@ -706,6 +707,7 @@ curl_easy_getinfo_ccsid(CURL *curl, CURLINFO info, ...)
         break;
       }
     }
+  }
 
   va_end(arg);
   return ret;
@@ -1355,13 +1357,12 @@ curl_pushheader_byname_ccsid(struct curl_pushheaders *h, const char *header,
 
 {
   char *d = (char *) NULL;
-  char *s;
 
   if(header) {
     header = dynconvert(ASCII_CCSID, header, -1, ccsidin);
 
     if(header) {
-      s = curl_pushheader_byname(h, header);
+      char *s = curl_pushheader_byname(h, header);
       free((char *) header);
 
       if(s)