Addendum to cb5481d

vendor/curl/include/curl/curl_trc.h

@@ -0,0 +1,150 @@
+#ifndef HEADER_CURL_TRC_H
+#define HEADER_CURL_TRC_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+struct Curl_easy;
+struct Curl_cfilter;
+
+/**
+ * Init logging, return != 0 on failure.
+ */
+CURLcode Curl_trc_init(void);
+
+/**
+ * Configure tracing. May be called several times during global
+ * initialization. Later calls may not take effect.
+ *
+ * Configuration format supported:
+ * - comma-separated list of component names to enable logging on.
+ *   E.g. 'http/2,ssl'. Unknown names are ignored. Names are compared
+ *   case-insensitive.
+ * - component 'all' applies to all known log components
+ * - prefixing a component with '+' or '-' will en-/disable logging for
+ *   that component
+ * Example: 'all,-ssl' would enable logging for all components but the
+ * SSL filters.
+ *
+ * @param config configuration string
+ */
+CURLcode Curl_trc_opt(const char *config);
+
+/* the function used to output verbose information */
+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.
+ */
+void Curl_failf(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
+
+#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)
+
+#define infof(data, ...) \
+  do { if(Curl_trc_is_verbose(data)) \
+         Curl_infof(data, __VA_ARGS__); } while(0)
+#define CURL_TRC_CF(data, 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 */
+#define infof Curl_infof
+#define CURL_TRC_CF Curl_trc_cf_infof
+#endif /* variadic macro args */
+
+#else /* !CURL_DISABLE_VERBOSE_STRINGS */
+/* All informational messages are not compiled in for size savings */
+
+#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
+
+#endif /* CURL_DISABLE_VERBOSE_STRINGS */
+
+#endif /* HEADER_CURL_TRC_H */