From 1d917b3944c05b5491be467f893dc280b74ef98f Mon Sep 17 00:00:00 2001
From: Rafael Garcia-Suarez <rgarciasuarez@gmail.com>
Date: Fri, 28 Nov 2003 22:38:40 +0000
Subject: [PATCH] Fix a regression introduced by change #21694 on sprintf()
 with long doubles, by disabling the specific optimisation path in this case ;
 remove a unnecessary cast ; add a new test file for miscellaneous sprintf()
 test that don't fit in the t/op/sprintf.t framework. p4raw-link: @21694 on
 //depot/perl: 4151a5feffa8bdd67c09edf6ade78431e8079f67

p4raw-id: //depot/perl@21800
---
 MANIFEST        |  1 +
 sv.c            |  6 ++++--
 t/op/sprintf2.t | 20 ++++++++++++++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 t/op/sprintf2.t

diff --git a/MANIFEST b/MANIFEST
index cd3c05a..7dd4edf 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -2796,6 +2796,7 @@ t/op/sort.t			See if sort works
 t/op/splice.t			See if splice works
 t/op/split.t			See if split works
 t/op/sprintf.t			See if sprintf works
+t/op/sprintf2.t			See if sprintf works
 t/op/srand.t			See if srand works
 t/op/stash.t			See if %:: stashes work
 t/op/stat.t			See if stat works
diff --git a/sv.c b/sv.c
index 3ff4bb0..16c7bbc 100644
--- a/sv.c
+++ b/sv.c
@@ -8630,6 +8630,7 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 	}
     }
 
+#ifndef USE_LONG_DOUBLE
     /* special-case "%.<number>[gf]" */
     if ( patlen <= 5 && pat[0] == '%' && pat[1] == '.'
 	 && (pat[patlen-1] == 'g' || pat[patlen-1] == 'f') ) {
@@ -8650,7 +8651,7 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 		return;
 	    if (*pp == 'g') {
 		if (digits < sizeof(ebuf) - NV_DIG - 10) { /* 0, point, slack */
-		    Gconvert((double)nv, digits, 0, ebuf);
+		    Gconvert(nv, digits, 0, ebuf);
 		    sv_catpv(sv, ebuf);
 		    if (*ebuf)	/* May return an empty string for digits==0 */
 			return;
@@ -8665,6 +8666,7 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 	    }
 	}
     }
+#endif /* !USE_LONG_DOUBLE */
 
     if (!args && svix < svmax && DO_UTF8(*svargs))
 	has_utf8 = TRUE;
@@ -9359,7 +9361,7 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 	    if ( !(width || left || plus || alt) && fill != '0'
 		 && has_precis && intsize != 'q' ) {	/* Shortcuts */
 		if ( c == 'g') {
-		    Gconvert((double)nv, precis, 0, PL_efloatbuf);
+		    Gconvert(nv, precis, 0, PL_efloatbuf);
 		    if (*PL_efloatbuf)	/* May return an empty string for digits==0 */
 			goto float_converted;
 		} else if ( c == 'f' && !precis) {
diff --git a/t/op/sprintf2.t b/t/op/sprintf2.t
new file mode 100644
index 0000000..fef25f1
--- /dev/null
+++ b/t/op/sprintf2.t
@@ -0,0 +1,20 @@
+#!./perl -w
+
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib';
+    require './test.pl';
+}   
+
+plan tests => 2;
+
+is(
+    sprintf("%.40g ",0.01),
+    sprintf("%.40g", 0.01)." ",
+    q(the sprintf "%.<number>g" optimization)
+);
+is(
+    sprintf("%.40f ",0.01),
+    sprintf("%.40f", 0.01)." ",
+    q(the sprintf "%.<number>f" optimization)
+);
-- 
2.7.4