checksrc: warn for leading spaces before the preprocessor hash

Fix the 40+ fallouts

Closes #20282

lib/curl_ntlm_core.c

@@ -57,11 +57,11 @@
 #endif
 
 #if defined(USE_OPENSSL) && defined(HAVE_DES_ECB_ENCRYPT)
-  #define USE_OPENSSL_DES
+#  define USE_OPENSSL_DES
 #elif defined(USE_WOLFSSL) && defined(HAVE_WOLFSSL_DES_ECB_ENCRYPT)
-  #define USE_OPENSSL_DES
+#  define USE_OPENSSL_DES
 #elif defined(USE_MBEDTLS) && defined(HAVE_MBEDTLS_DES_CRYPT_ECB)
-  #define USE_MBEDTLS_DES
+#  define USE_MBEDTLS_DES
 #endif
 
 #ifdef USE_OPENSSL_DES

lib/file.c

@@ -204,7 +204,7 @@ static CURLcode file_connect(struct Curl_easy *data, bool *done)
     return CURLE_URL_MALFORMAT;
   }
 
-  #ifdef AMIGA_FILESYSTEM
+#ifdef AMIGA_FILESYSTEM
   /*
    * A leading slash in an AmigaDOS path denotes the parent
    * directory, and hence we block this as it is relative.
@@ -227,10 +227,10 @@ static CURLcode file_connect(struct Curl_easy *data, bool *done)
       fd = curlx_open(real_path, O_RDONLY);
     }
   }
-  #else
+#else
   fd = curlx_open(real_path, O_RDONLY);
   file->path = real_path;
-  #endif
+#endif
 #endif
   curlx_free(file->freepath);
   file->freepath = real_path; /* free this when done */

lib/http_negotiate.c

@@ -233,19 +233,19 @@ CURLcode Curl_output_negotiate(struct Curl_easy *data,
     }
 
     *state = GSS_AUTHSENT;
-  #ifdef HAVE_GSSAPI
+#ifdef HAVE_GSSAPI
     if(neg_ctx->status == GSS_S_COMPLETE ||
        neg_ctx->status == GSS_S_CONTINUE_NEEDED) {
       *state = GSS_AUTHDONE;
     }
-  #else
-  #ifdef USE_WINDOWS_SSPI
+#else
+#ifdef USE_WINDOWS_SSPI
     if(neg_ctx->status == SEC_E_OK ||
        neg_ctx->status == SEC_I_CONTINUE_NEEDED) {
       *state = GSS_AUTHDONE;
     }
-  #endif
-  #endif
+#endif
+#endif
   }
 
   if(*state == GSS_AUTHDONE || *state == GSS_AUTHSUCC) {

lib/md4.c

@@ -70,10 +70,10 @@
 #if defined(USE_WOLFSSL) && !defined(WOLFSSL_NO_MD4)
 
 #ifdef OPENSSL_COEXIST
-  #define MD4_CTX    WOLFSSL_MD4_CTX
-  #define MD4_Init   wolfSSL_MD4_Init
-  #define MD4_Update wolfSSL_MD4_Update
-  #define MD4_Final  wolfSSL_MD4_Final
+#  define MD4_CTX    WOLFSSL_MD4_CTX
+#  define MD4_Init   wolfSSL_MD4_Init
+#  define MD4_Update wolfSSL_MD4_Update
+#  define MD4_Final  wolfSSL_MD4_Final
 #endif
 
 #elif defined(USE_OPENSSL) && !defined(OPENSSL_NO_MD4)

lib/md5.c

@@ -30,28 +30,28 @@
 #include "curl_hmac.h"
 
 #ifdef USE_OPENSSL
-  #include <openssl/opensslconf.h>
-  #if !defined(OPENSSL_NO_MD5) && !defined(OPENSSL_NO_DEPRECATED_3_0)
-    #define USE_OPENSSL_MD5
-  #endif
+#include <openssl/opensslconf.h>
+#if !defined(OPENSSL_NO_MD5) && !defined(OPENSSL_NO_DEPRECATED_3_0)
+#define USE_OPENSSL_MD5
+#endif
 #endif
 
 #ifdef USE_WOLFSSL
-  #include <wolfssl/options.h>
-  #ifndef NO_MD5
-    #define USE_WOLFSSL_MD5
-  #endif
+#include <wolfssl/options.h>
+#ifndef NO_MD5
+#define USE_WOLFSSL_MD5
+#endif
 #endif
 
 #ifdef USE_MBEDTLS
-  #include <mbedtls/version.h>
-  #if MBEDTLS_VERSION_NUMBER < 0x03020000
-    #error "mbedTLS 3.2.0 or later required"
-  #endif
-  #include <psa/crypto_config.h>
-  #if defined(PSA_WANT_ALG_MD5) && PSA_WANT_ALG_MD5  /* mbedTLS 4+ */
-    #define USE_MBEDTLS_MD5
-  #endif
+#include <mbedtls/version.h>
+#if MBEDTLS_VERSION_NUMBER < 0x03020000
+#error "mbedTLS 3.2.0 or later required"
+#endif
+#include <psa/crypto_config.h>
+#if defined(PSA_WANT_ALG_MD5) && PSA_WANT_ALG_MD5  /* mbedTLS 4+ */
+#define USE_MBEDTLS_MD5
+#endif
 #endif
 
 #ifdef USE_GNUTLS

lib/sha256.c

@@ -30,14 +30,14 @@
 #include "curl_sha256.h"
 
 #ifdef USE_MBEDTLS
-  #include <mbedtls/version.h>
-  #if MBEDTLS_VERSION_NUMBER < 0x03020000
-    #error "mbedTLS 3.2.0 or later required"
-  #endif
-  #include <psa/crypto_config.h>
-  #if defined(PSA_WANT_ALG_SHA_256) && PSA_WANT_ALG_SHA_256  /* mbedTLS 4+ */
-    #define USE_MBEDTLS_SHA256
-  #endif
+#include <mbedtls/version.h>
+#if MBEDTLS_VERSION_NUMBER < 0x03020000
+#error "mbedTLS 3.2.0 or later required"
+#endif
+#include <psa/crypto_config.h>
+#if defined(PSA_WANT_ALG_SHA_256) && PSA_WANT_ALG_SHA_256  /* mbedTLS 4+ */
+#define USE_MBEDTLS_SHA256
+#endif
 #endif
 
 #ifdef USE_OPENSSL

lib/vquic/curl_ngtcp2.c

@@ -2639,7 +2639,7 @@ static CURLcode cf_connect_start(struct Curl_cfilter *cf,
 #elif defined(USE_WOLFSSL)
   ngtcp2_conn_set_tls_native_handle(ctx->qconn, ctx->tls.wssl.ssl);
 #else
-  #error "ngtcp2 TLS backend not defined"
+#error "ngtcp2 TLS backend not defined"
 #endif
 
   ngtcp2_ccerr_default(&ctx->last_error);

lib/vssh/libssh.c

@@ -751,11 +751,11 @@ static int myssh_in_SFTP_QUOTE_STATVFS(struct Curl_easy *data,
     return SSH_OK;
   }
   else if(statvfs) {
-    #ifdef _MSC_VER
-    #define CURL_LIBSSH_VFS_SIZE_MASK "I64u"
-    #else
-    #define CURL_LIBSSH_VFS_SIZE_MASK PRIu64
-    #endif
+#ifdef _MSC_VER
+#define CURL_LIBSSH_VFS_SIZE_MASK "I64u"
+#else
+#define CURL_LIBSSH_VFS_SIZE_MASK PRIu64
+#endif
     CURLcode result = CURLE_OK;
     char *tmp = curl_maprintf("statvfs:\n"
                               "f_bsize: %" CURL_LIBSSH_VFS_SIZE_MASK "\n"