libpkgconf: client: move pkgconf_error() and pkgconf_default_error_handler() here

libpkgconf/client.c

@@ -196,3 +196,51 @@ pkgconf_client_set_buildroot_dir(pkgconf_client_t *client, const char *buildroot
 
 	pkgconf_tuple_add_global(client, "pc_top_builddir", client->buildroot_dir != NULL ? client->buildroot_dir : "$(top_builddir)");
 }
+
+/*
+ * !doc
+ *
+ * .. c:function:: bool pkgconf_error(const pkgconf_client_t *client, const char *format, ...)
+ *
+ *    Report an error to a client-registered error handler.
+ *
+ *    :param pkgconf_client_t* client: The pkgconf client object to report the error to.
+ *    :param char* format: A printf-style format string to use for formatting the error message.
+ *    :return: true if the error handler processed the message, else false.
+ *    :rtype: bool
+ */
+bool
+pkgconf_error(const pkgconf_client_t *client, const char *format, ...)
+{
+	char errbuf[PKGCONF_BUFSIZE];
+	va_list va;
+
+	va_start(va, format);
+	vsnprintf(errbuf, sizeof errbuf, format, va);
+	va_end(va);
+
+	return client->error_handler(errbuf, client, client->error_handler_data);
+}
+
+/*
+ * !doc
+ *
+ * .. c:function:: bool pkgconf_default_error_handler(const char *msg, const pkgconf_client_t *client, const void *data)
+ *
+ *    The default pkgconf error handler.
+ *
+ *    :param char* msg: The error message to handle.
+ *    :param pkgconf_client_t* client: The client object the error originated from.
+ *    :param void* data: An opaque pointer to extra data associated with the client for error handling.
+ *    :return: true (the function does nothing to process the message)
+ *    :rtype: bool
+ */
+bool
+pkgconf_default_error_handler(const char *msg, const pkgconf_client_t *client, const void *data)
+{
+	(void) msg;
+	(void) client;
+	(void) data;
+
+	return true;
+}

libpkgconf/pkg.c

@@ -16,29 +16,6 @@
 #include <libpkgconf/config.h>
 #include <libpkgconf/libpkgconf.h>
 
-bool
-pkgconf_error(const pkgconf_client_t *client, const char *format, ...)
-{
-	char errbuf[PKGCONF_BUFSIZE];
-	va_list va;
-
-	va_start(va, format);
-	vsnprintf(errbuf, sizeof errbuf, format, va);
-	va_end(va);
-
-	return client->error_handler(errbuf, client, client->error_handler_data);
-}
-
-bool
-pkgconf_default_error_handler(const char *msg, const pkgconf_client_t *client, const void *data)
-{
-	(void) msg;
-	(void) client;
-	(void) data;
-
-	return true;
-}
-
 #ifdef _WIN32
 #	define PKG_CONFIG_REG_KEY "Software\\pkgconfig\\PKG_CONFIG_PATH"
 #	undef PKG_DEFAULT_PATH