lib: apache style infof and trace macros/functions

- test for a simplified C99 variadic check
- args to infof() in --disable-verbose are no longer disregarded but
  must compile.

Closes #12167
Fixes #12083
Fixes #11880
Fixes #11891

lib/arpa_telnet.h

@@ -56,12 +56,14 @@ static const char * const telnetoptions[]=
   "TERM SPEED",  "LFLOW",          "LINEMODE",      "XDISPLOC",
   "OLD-ENVIRON", "AUTHENTICATION", "ENCRYPT",       "NEW-ENVIRON"
 };
+#define CURL_TELOPT(x)    telnetoptions[x]
+#else
+#define CURL_TELOPT(x)    ""
 #endif
 
 #define CURL_TELOPT_MAXIMUM CURL_TELOPT_NEW_ENVIRON
 
 #define CURL_TELOPT_OK(x) ((x) <= CURL_TELOPT_MAXIMUM)
-#define CURL_TELOPT(x)    telnetoptions[x]
 
 #define CURL_NTELOPTS 40
 
@@ -103,7 +105,12 @@ static const char * const telnetcmds[]=
 
 #define CURL_TELCMD_OK(x) ( ((unsigned int)(x) >= CURL_TELCMD_MINIMUM) && \
                        ((unsigned int)(x) <= CURL_TELCMD_MAXIMUM) )
+
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
 #define CURL_TELCMD(x)    telnetcmds[(x)-CURL_TELCMD_MINIMUM]
+#else
+#define CURL_TELCMD(x)    ""
+#endif
 
 #endif /* CURL_DISABLE_TELNET */
 

lib/cf-socket.c

@@ -102,11 +102,7 @@ static void tcpnodelay(struct Curl_easy *data, curl_socket_t sockfd)
 #if defined(TCP_NODELAY)
   curl_socklen_t onoff = (curl_socklen_t) 1;
   int level = IPPROTO_TCP;
-#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
   char buffer[STRERROR_LEN];
-#else
-  (void) data;
-#endif
 
   if(setsockopt(sockfd, level, TCP_NODELAY, (void *)&onoff,
                 sizeof(onoff)) < 0)

lib/curl_trc.c

@@ -105,6 +105,8 @@ void Curl_failf(struct Curl_easy *data, const char *fmt, ...)
   }
 }
 
+#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
+
 /* Curl_infof() is for info message along the way */
 #define MAXINFO 2048
 
@@ -124,8 +126,6 @@ void Curl_infof(struct Curl_easy *data, const char *fmt, ...)
   }
 }
 
-#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
-
 void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
                        const char *fmt, ...)
 {
@@ -238,14 +238,4 @@ CURLcode Curl_trc_init(void)
   return CURLE_OK;
 }
 
-#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
-void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
-                       const char *fmt, ...)
-{
-  (void)data;
-  (void)cf;
-  (void)fmt;
-}
-#endif
-
 #endif /* !DEBUGBUILD */

lib/curl_trc.h

@@ -54,19 +54,6 @@ CURLcode Curl_trc_opt(const char *config);
 void Curl_debug(struct Curl_easy *data, curl_infotype type,
                 char *ptr, size_t size);
 
-/**
- * Output an informational message when transfer's verbose logging is enabled.
- */
-void Curl_infof(struct Curl_easy *data,
-#if defined(__GNUC__) && !defined(printf) &&                    \
-  defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
-  !defined(__MINGW32__)
-                       const char *fmt, ...)
-                       __attribute__((format(printf, 2, 3)));
-#else
-                       const char *fmt, ...);
-#endif
-
 /**
  * Output a failure message on registered callbacks for transfer.
  */
@@ -82,39 +69,15 @@ void Curl_failf(struct Curl_easy *data,
 
 #define failf Curl_failf
 
-/**
- * Output an informational message when both transfer's verbose logging
- * and connection filters verbose logging are enabled.
- */
-void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
-#if defined(__GNUC__) && !defined(printf) &&                    \
-  defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
-  !defined(__MINGW32__)
-                       const char *fmt, ...)
-                       __attribute__((format(printf, 3, 4)));
-#else
-                       const char *fmt, ...);
-#endif
-
 #define CURL_LOG_LVL_NONE  0
 #define CURL_LOG_LVL_INFO  1
 
 
-#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
-/* informational messages enabled */
-
-#define Curl_trc_is_verbose(data)    ((data) && (data)->set.verbose)
-#define Curl_trc_cf_is_verbose(cf, data) \
-                            ((data) && (data)->set.verbose && \
-                            (cf) && (cf)->cft->log_level >= CURL_LOG_LVL_INFO)
-
-/* explainer: we have some mix configuration and werror settings
- * that define HAVE_VARIADIC_MACROS_C99 even though C89 is enforced
- * on gnuc and some other compiler. Need to treat carefully.
- */
-#if defined(HAVE_VARIADIC_MACROS_C99) && \
-    defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#define CURL_HAVE_C99
+#endif
 
+#ifdef CURL_HAVE_C99
 #define infof(data, ...) \
   do { if(Curl_trc_is_verbose(data)) \
          Curl_infof(data, __VA_ARGS__); } while(0)
@@ -122,10 +85,43 @@ void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
   do { if(Curl_trc_cf_is_verbose(cf, data)) \
          Curl_trc_cf_infof(data, cf, __VA_ARGS__); } while(0)
 
-#else /* no variadic macro args */
+#else
 #define infof Curl_infof
 #define CURL_TRC_CF Curl_trc_cf_infof
-#endif /* variadic macro args */
+#endif
+
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
+/* informational messages enabled */
+
+#define Curl_trc_is_verbose(data)    ((data) && (data)->set.verbose)
+#define Curl_trc_cf_is_verbose(cf, data) \
+                            ((data) && (data)->set.verbose && \
+                            (cf) && (cf)->cft->log_level >= CURL_LOG_LVL_INFO)
+
+/**
+ * Output an informational message when transfer's verbose logging is enabled.
+ */
+void Curl_infof(struct Curl_easy *data,
+#if defined(__GNUC__) && !defined(printf) && defined(CURL_HAVE_C99) &&  \
+  !defined(__MINGW32__)
+                       const char *fmt, ...)
+                       __attribute__((format(printf, 2, 3)));
+#else
+                       const char *fmt, ...);
+#endif
+
+/**
+ * Output an informational message when both transfer's verbose logging
+ * and connection filters verbose logging are enabled.
+ */
+void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
+#if defined(__GNUC__) && !defined(printf) && defined(CURL_HAVE_C99) && \
+  !defined(__MINGW32__)
+                      const char *fmt, ...)
+                      __attribute__((format(printf, 3, 4)));
+#else
+                      const char *fmt, ...);
+#endif
 
 #else /* !CURL_DISABLE_VERBOSE_STRINGS */
 /* All informational messages are not compiled in for size savings */
@@ -133,17 +129,17 @@ void Curl_trc_cf_infof(struct Curl_easy *data, struct Curl_cfilter *cf,
 #define Curl_trc_is_verbose(d)        ((void)(d), FALSE)
 #define Curl_trc_cf_is_verbose(x,y)   ((void)(x), (void)(y), FALSE)
 
-#if defined(HAVE_VARIADIC_MACROS_C99)
-#define infof(...)  Curl_nop_stmt
-#define CURL_TRC_CF(...)  Curl_nop_stmt
-#define Curl_trc_cf_infof(...)  Curl_nop_stmt
-#elif defined(HAVE_VARIADIC_MACROS_GCC)
-#define infof(x...)  Curl_nop_stmt
-#define CURL_TRC_CF(x...)  Curl_nop_stmt
-#define Curl_trc_cf_infof(x...)  Curl_nop_stmt
-#else
-#error "missing VARIADIC macro define, fix and rebuild!"
-#endif
+static void Curl_infof(struct Curl_easy *data, const char *fmt, ...)
+{
+  (void)data; (void)fmt;
+}
+
+static void Curl_trc_cf_infof(struct Curl_easy *data,
+                              struct Curl_cfilter *cf,
+                              const char *fmt, ...)
+{
+  (void)data; (void)cf; (void)fmt;
+}
 
 #endif /* CURL_DISABLE_VERBOSE_STRINGS */
 

lib/doh.c

@@ -936,10 +936,12 @@ CURLcode Curl_doh_is_resolved(struct Curl_easy *data,
                             p->dnstype,
                             &de);
       Curl_dyn_free(&p->serverdoh);
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
       if(rc[slot]) {
         infof(data, "DoH: %s type %s for %s", doh_strerror(rc[slot]),
               type2name(p->dnstype), dohp->host);
       }
+#endif
     } /* next slot */
 
     result = CURLE_COULDNT_RESOLVE_HOST; /* until we know better */

lib/hostip.c

@@ -1283,9 +1283,11 @@ err:
         Curl_freeaddrinfo(head);
         return CURLE_OUT_OF_MEMORY;
       }
+#ifndef CURL_DISABLE_VERBOSE_STRINGS
       infof(data, "Added %.*s:%d:%s to DNS cache%s",
             (int)hlen, host_begin, port, addresses,
             permanent ? "" : " (non-permanent)");
+#endif
 
       /* Wildcard hostname */
       if((hlen == 1) && (host_begin[0] == '*')) {