From ae2d32304bf34dc01de041c7d0fb50c07bc6adf2 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 6 Feb 2015 08:37:19 +0000
Subject: error.c: warning_string

* error.c (warning_string): extract a method to create warning
  message string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49526 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 error.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/error.c b/error.c
index 8cf343901c..3cb068dfbf 100644
--- a/error.c
+++ b/error.c
@@ -198,10 +198,10 @@ rb_compile_warning(const char *file, int line, const char *fmt, ...)
     va_end(args);
 }
 
-static void
-warn_print(const char *fmt, va_list args)
+static VALUE
+warning_string(rb_encoding *enc, const char *fmt, va_list args)
 {
-    VALUE str = rb_str_new(0, 0);
+    VALUE str = rb_enc_str_new(0, 0, enc);
     VALUE file = rb_sourcefilename();
 
     if (!NIL_P(file)) {
@@ -214,32 +214,36 @@ warn_print(const char *fmt, va_list args)
     rb_str_cat2(str, "warning: ");
     rb_str_vcatf(str, fmt, args);
     rb_str_cat2(str, "\n");
-    rb_write_error_str(str);
+    return str;
 }
 
 void
 rb_warn(const char *fmt, ...)
 {
+    VALUE mesg;
     va_list args;
 
     if (NIL_P(ruby_verbose)) return;
 
     va_start(args, fmt);
-    warn_print(fmt, args);
+    mesg = warning_string(0, fmt, args);
     va_end(args);
+    rb_write_error_str(mesg);
 }
 
 /* rb_warning() reports only in verbose mode */
 void
 rb_warning(const char *fmt, ...)
 {
+    VALUE mesg;
     va_list args;
 
     if (!RTEST(ruby_verbose)) return;
 
     va_start(args, fmt);
-    warn_print(fmt, args);
+    mesg = warning_string(0, fmt, args);
     va_end(args);
+    rb_write_error_str(mesg);
 }
 
 /*
@@ -2088,7 +2092,7 @@ rb_mod_syserr_fail_str(VALUE mod, int e, VALUE mesg)
 void
 rb_sys_warning(const char *fmt, ...)
 {
-    char buf[BUFSIZ];
+    VALUE mesg;
     va_list args;
     int errno_save;
 
@@ -2096,11 +2100,12 @@ rb_sys_warning(const char *fmt, ...)
 
     if (!RTEST(ruby_verbose)) return;
 
-    snprintf(buf, BUFSIZ, "%s: %s", fmt, strerror(errno_save));
-
     va_start(args, fmt);
-    warn_print(buf, args);
+    mesg = warning_string(0, fmt, args);
     va_end(args);
+    rb_str_set_len(mesg, RSTRING_LEN(mesg)-1);
+    rb_str_catf(mesg, ": %s\n", strerror(errno_save));
+    rb_write_error_str(mesg);
     errno = errno_save;
 }
 
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