build: fix Codacy warnings

Reduce variable scopes and remove redundant variable stores.

Closes https://github.com/curl/curl/pull/3975

10 files changed, 31 insertions, 60 deletions

diff --git a/lib/curl_ntlm_core.c b/lib/curl_ntlm_core.c
index b6df38f71..9e6fdcab2 100644
--- a/lib/curl_ntlm_core.c
+++ b/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;
 
diff --git a/lib/ftp.c b/lib/ftp.c
index d6343fd51..76ebbc44f 100644
--- a/lib/ftp.c
+++ b/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)
diff --git a/lib/imap.c b/lib/imap.c
index bdcc69c67..f3ffa290b 100644
--- a/lib/imap.c
+++ b/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);
diff --git a/lib/pop3.c b/lib/pop3.c
index c8f3965e4..a681d5213 100644
--- a/lib/pop3.c
+++ b/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);
diff --git a/lib/smb.c b/lib/smb.c
index 76c99a230..5a4b7804d 100644
--- a/lib/smb.c
+++ b/lib/smb.c
@@ -957,7 +957,6 @@ 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;
@@ -965,7 +964,8 @@ static CURLcode smb_parse_url_path(struct connectdata *conn)
   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;
 
diff --git a/lib/smtp.c b/lib/smtp.c
index 4a3462b84..e10d0fbfc 100644
--- a/lib/smtp.c
+++ b/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);
diff --git a/lib/ssh-libssh.c b/lib/ssh-libssh.c
index 6cfd6bda8..ca1337677 100644
--- a/lib/ssh-libssh.c
+++ b/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);
 
diff --git a/lib/vauth/digest.c b/lib/vauth/digest.c
index f9cdc9dd0..8cd4d83ed 100644
--- a/lib/vauth/digest.c
+++ b/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;
 
diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index 44a2bdda6..40626a5f1 100644
--- a/lib/vtls/cyassl.c
+++ b/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;
diff --git a/lib/vtls/mesalink.c b/lib/vtls/mesalink.c
index 718c282ee..7ca4f0eac 100644
--- a/lib/vtls/mesalink.c
+++ b/lib/vtls/mesalink.c
@@ -265,7 +265,6 @@ 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) {
@@ -273,6 +272,7 @@ mesalink_connect_step2(struct connectdata *conn, int sockindex)
       return CURLE_OK;
     }
     else {
+      char error_buffer[MESALINK_MAX_ERROR_SZ];
       failf(data,
             "SSL_connect failed with error %d: %s",
             detail,