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Fix bug about String#scanf("%a")

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* lib/scanf.rb (extract_float, initialize): allow to omit a sign
  on the binary exponent.  [ruby-core:82435] [Bug #13833]
  [Fix GH-1689]

From: tarotaro0 <tarousann11922960@yahoo.co.jp>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60261 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-10-21 12:34:13 +00:00
parent 6fba455acb
commit 4bf6a04f49
2 changed files with 4 additions and 3 deletions
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6
lib/scanf.rb
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@ -295,7 +295,7 @@ module Scanf
def extract_float(s)
return nil unless s &&! skip
if /\A(?<sign>[-+]?)0[xX](?<frac>\.\h+|\h+(?:\.\h*)?)[pP](?<exp>[-+]\d+)/ =~ s
if /\A(?<sign>[-+]?)0[xX](?<frac>\.\h+|\h+(?:\.\h*)?)[pP](?<exp>[-+]?\d+)/ =~ s
f1, f2 = frac.split('.')
f = f1.hex
if f2
@ -411,11 +411,11 @@ module Scanf
# %f
when /%\*?[aefgAEFG]/
[ '([-+]?(?:0[xX](?:\.\h+|\h+(?:\.\h*)?)[pP][-+]\d+|\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))', :extract_float ]
[ '([-+]?(?:0[xX](?:\.\h+|\h+(?:\.\h*)?)[pP][-+]?\d+|\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))', :extract_float ]
# %5f
when /%\*?(\d+)[aefgAEFG]/
[ '(?=[-+]?(?:0[xX](?:\.\h+|\h+(?:\.\h*)?)[pP][-+]\d+|\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))' +
[ '(?=[-+]?(?:0[xX](?:\.\h+|\h+(?:\.\h*)?)[pP][-+]?\d+|\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))' +
"(\\S{1,#{$1}})", :extract_float ]
# %5s

1
test/scanf/test_scanf.rb
View file

@ -258,6 +258,7 @@ module ScanfTests
[ "%G", "+3.25e2", [325.0] ],
[ "%f", "3.z", [3.0] ],
[ "%a", "0X1P+10", [1024.0] ],
[ "%a", "0X1P10", [1024.0] ],
[ "%A", "0x1.deadbeefp+99", [1.1851510441583988e+30] ],
# Testing embedded matches including literal '[' behavior