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Port two fixes made only in ruby/ruby #4243

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Merged
kddnewton merged 2 commits into from
Oct 7, 2026
+3 −3
Merged

Port two fixes made only in ruby/ruby #4243

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6412572
Use _BitScanForward64 only on 64-bit MSVC
hsbt Sep 25, 2026
2ef5e23
Remove unsupported platforms from host_os patterns
hsbt Sep 24, 2026
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2 changes: 1 addition & 1 deletion include/prism/internal/bit.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@
*/
#if defined(__GNUC__) || defined(__clang__)
#define pm_ctzll(v) ((unsigned) __builtin_ctzll(v))
#elif defined(_MSC_VER)
#elif defined(_MSC_VER) && defined(_WIN64)
#include <intrin.h>
#include <stdint.h>

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2 changes: 1 addition & 1 deletion lib/prism/ffi.rb
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Expand Up @@ -186,7 +186,7 @@ def self.with
# pointer directly; for files it uses a pm_source_t under the hood.
class PrismSource # :nodoc:
PLATFORM_EXPECTS_UTF8 =
RbConfig::CONFIG["host_os"].match?(/bccwin|cygwin|djgpp|mingw|mswin|wince|darwin/i)
RbConfig::CONFIG["host_os"].match?(/cygwin|mingw|mswin|darwin/i)

attr_reader :pointer, :length

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2 changes: 1 addition & 1 deletion test/prism/test_helper.rb
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Expand Up @@ -236,7 +236,7 @@ def self.each_encoding

# True if the current platform is Windows.
def self.windows?
RbConfig::CONFIG["host_os"].match?(/bccwin|cygwin|djgpp|mingw|mswin|wince/i)
RbConfig::CONFIG["host_os"].match?(/cygwin|mingw|mswin/i)
end

# All versions that prism can parse
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