[tarantool-patches] [PATCH v2 1/2] Refactoring in string validation of log parameters

[Olga Arkhangelskaia <arkholga@tarantool.org>]

Removed unnecessary double check of log configuration string.
Instead all log configuration checks were moved to separate function.
---
Branch: https://github.com/tarantool/tarantool/tree/OKriw/refactor-log-cfg

v1:
https://www.freelists.org/post/tarantool-patches/PATCH-Refactoring-in-string-validation-of-log-parametrs

Changes in v2:
- exceptions transfered to box.cc
- say_parse_logger_type traansfered to say_ckeck_cfg


 src/box/box.cc | 40 ++++++++--------------------------------
 src/say.c      | 34 +++++++++++++++++++++++++---------
 src/say.h      |  8 ++++----
 3 files changed, 37 insertions(+), 45 deletions(-)

diff --git a/src/box/box.cc b/src/box/box.cc
index 7c6312d78..db598957a 100644
--- a/src/box/box.cc
+++ b/src/box/box.cc
@@ -356,41 +356,17 @@ box_check_say()
 	const char *log = cfg_gets("log");
 	if (log == NULL)
 		return;
-	enum say_logger_type type;
-	if (say_parse_logger_type(&log, &type) < 0) {
-		tnt_raise(ClientError, ER_CFG, "log",
-			  diag_last_error(diag_get())->errmsg);
-	}
-
-	if (say_check_init_str(log) == -1) {
-
-		diag_raise();
-	}
-
-	if (type == SAY_LOGGER_SYSLOG) {
-		struct say_syslog_opts opts;
-		if (say_parse_syslog_opts(log, &opts) < 0) {
-			if (diag_last_error(diag_get())->type ==
-			    &type_IllegalParams) {
-				tnt_raise(ClientError, ER_CFG, "log",
-					  diag_last_error(diag_get())->errmsg);
-			}
-		}
-		say_free_syslog_opts(&opts);
-		diag_raise();
-	}
 
 	const char *log_format = cfg_gets("log_format");
-	enum say_format format = say_format_by_name(log_format);
-	if (format == say_format_MAX)
-		diag_set(ClientError, ER_CFG, "log_format",
-			 "expected 'plain' or 'json'");
-	if (type == SAY_LOGGER_SYSLOG && format == SF_JSON) {
-		tnt_raise(ClientError, ER_ILLEGAL_PARAMS, "log, log_format");
-	}
 	int log_nonblock = cfg_getb("log_nonblock");
-	if (log_nonblock == 1 && type == SAY_LOGGER_FILE) {
-		tnt_raise(ClientError, ER_ILLEGAL_PARAMS, "log, log_nonblock");
+	if (say_check_cfg(log, log_format, log_nonblock) < 0) {
+		if (diag_last_error(diag_get())->type ==
+		    &type_IllegalParams) {
+			tnt_raise(ClientError, ER_CFG,
+				  "log, log_format or log_nonblock",
+				  diag_last_error(diag_get())->errmsg);
+		}
+
 	}
 }
 
diff --git a/src/say.c b/src/say.c
index 43124083c..92e0e6d9f 100644
--- a/src/say.c
+++ b/src/say.c
@@ -952,25 +952,41 @@ write_to_syslog(struct log *log, int total)
 /** Loggers }}} */
 
 /*
- * Init string parser(s)
+ * Checks in logger configuration
  */
 
 int
-say_check_init_str(const char *str)
+say_check_cfg(const char *log, const char *log_format, int log_nonblock)
 {
+	int res = 0;
 	enum say_logger_type type;
-	if (say_parse_logger_type(&str, &type)) {
-		diag_set(IllegalParams, logger_syntax_reminder);
-		return -1;
+	if (say_parse_logger_type(&log, &type) < 0) {
+		diag_set(IllegalParams, "Unrecognised logger type '%s'", log);
+		res = -1;
 	}
 	if (type == SAY_LOGGER_SYSLOG) {
 		struct say_syslog_opts opts;
-
-		if (say_parse_syslog_opts(str, &opts) < 0)
-			return -1;
+		int ret = say_parse_syslog_opts(log, &opts);
 		say_free_syslog_opts(&opts);
+		if (ret < 0) {
+			diag_set(IllegalParams, "Incorrect option '%s'", log);
+			res = -1;
+		}
 	}
-	return 0;
+	enum say_format format = say_format_by_name(log_format);
+	if (format == say_format_MAX) {
+		diag_set(IllegalParams,
+			"for log_format expected 'plain' or 'json'");
+	}
+	if (type == SAY_LOGGER_SYSLOG && format == SF_JSON) {
+		diag_set(IllegalParams, "Illegal parametrs log, log_format");
+		res = -1;
+	}
+	if (log_nonblock == 1 && type == SAY_LOGGER_FILE) {
+		diag_set(IllegalParams, "Illegal parametrs log, log_nonblock");
+		res = -1;
+	}
+	return res;
 }
 
 /**
diff --git a/src/say.h b/src/say.h
index ad3ba3417..d14ae8b45 100644
--- a/src/say.h
+++ b/src/say.h
@@ -371,12 +371,12 @@ CFORMAT(printf, 5, 0) extern sayfunc_t _say;
 	log_say_level(log, S_SYSERROR, strerror(errno), format, ##__VA_ARGS__)
 
 /**
- * validates logger init string;
- * @returns 0 if validation passed or -1
- *           with an error message written to diag
+ * Validates logger configuration
+ * @retval -1 check is failed, invalid parameters
+ * @retval 0 check is successful
  */
 int
-say_check_init_str(const char *str);
+say_check_cfg(const char *log, const char *log_format, int log_nonblock);
 
 /* internals, for unit testing */
 
-- 
2.14.3 (Apple Git-98)