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<h3>
Ben Gamari pushed to branch wip/keepAlive-the-return-of-the-primop
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e11f088bf1f36cd8889ece8dd59c5d8964b8a2eb">e11f088b</a></strong>
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<span>by Ben Gamari</span>
<i>at 2020-12-01T00:38:40-05:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">StringBuffer: Use unsafeWithForeignPtr
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<h4>1 changed file:</h4>
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compiler/GHC/Data/StringBuffer.hs
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<h4>Changes:</h4>
<li id="1a8e557860a337556f570aff25f52ee93b397055">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e11f088bf1f36cd8889ece8dd59c5d8964b8a2eb#1a8e557860a337556f570aff25f52ee93b397055"><strong>compiler/GHC/Data/StringBuffer.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -68,6 +68,12 @@ import GHC.IO.Encoding.Failure ( CodingFailureMode(IgnoreCodingFailure) )</td>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign</span></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="kt" style="color: #458; font-weight: 600;">MIN_VERSION_base</span><span class="p">(</span><span class="mi" style="color: #099;">4</span><span class="p">,</span><span class="mi" style="color: #099;">15</span><span class="p">,</span><span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.ForeignPtr</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unsafeWithForeignPtr</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">else</span></span>
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="haskell"><span class="n" style="color: #333;">unsafeWithForeignPtr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ForeignPtr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="n" style="color: #333;">b</span></span>
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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell"><span class="n" style="color: #333;">unsafeWithForeignPtr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">withForeignPtr</span></span>
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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">endif</span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -----------------------------------------------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The StringBuffer type</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -107,7 +113,7 @@ hGetStringBuffer fname = do</td>
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"> <span class="n" style="color: #333;">offset_i</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">skipBOM</span> <span class="n" style="color: #333;">h</span> <span class="n" style="color: #333;">size_i</span> <span class="mi" style="color: #099;">0</span> <span class="c1" style="color: #998; font-style: italic;">-- offset is 0 initially</span></span>
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fromIntegral</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">size_i</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">offset_i</span></span>
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<pre style="margin: 0;"> <span id="LC115" class="line" lang="haskell"> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mallocForeignPtrArray</span> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">3</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC110" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell"> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">==</span> <span class="mi" style="color: #099;">0</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="mi" style="color: #099;">0</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">hGetBuf</span> <span class="n" style="color: #333;">h</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">size</span></span>
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112
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118
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"> <span class="n" style="color: #333;">hClose</span> <span class="n" style="color: #333;">h</span></span>
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113
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119
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">/=</span> <span class="n" style="color: #333;">size</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -120,7 +126,7 @@ hGetStringBufferBlock handle wanted</td>
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120
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126
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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell"> <span class="n" style="color: #333;">offset_i</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">hTell</span> <span class="n" style="color: #333;">handle</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="n" style="color: #333;">skipBOM</span> <span class="n" style="color: #333;">handle</span> <span class="n" style="color: #333;">size_i</span></span>
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121
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127
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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">min</span> <span class="n" style="color: #333;">wanted</span> <span class="p">(</span><span class="n" style="color: #333;">fromIntegral</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">size_i</span><span class="o" style="font-weight: 600;">-</span><span class="n" style="color: #333;">offset_i</span><span class="p">)</span></span>
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122
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128
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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mallocForeignPtrArray</span> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">3</span><span class="p">)</span></span>
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123
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<pre style="margin: 0;">-<span id="LC123" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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129
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<pre style="margin: 0;">+<span id="LC129" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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124
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130
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">==</span> <span class="mi" style="color: #099;">0</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="mi" style="color: #099;">0</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">hGetBuf</span> <span class="n" style="color: #333;">handle</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">size</span></span>
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125
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131
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<pre style="margin: 0;"> <span id="LC131" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">/=</span> <span class="n" style="color: #333;">size</span></span>
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126
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<td class="diff-line-num new_line" data-linenumber="132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
132
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<pre style="margin: 0;"> <span id="LC132" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">ioError</span> <span class="p">(</span><span class="n" style="color: #333;">userError</span> <span class="o" style="font-weight: 600;">$</span> <span class="s" style="color: #d14;">"short read of file: "</span><span class="o" style="font-weight: 600;">++</span><span class="n" style="color: #333;">show</span><span class="p">(</span><span class="n" style="color: #333;">r</span><span class="p">,</span><span class="n" style="color: #333;">size</span><span class="p">,</span><span class="n" style="color: #333;">size_i</span><span class="p">,</span><span class="n" style="color: #333;">handle</span><span class="p">))</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="134" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -128,7 +134,7 @@ hGetStringBufferBlock handle wanted</td>
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128
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134
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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell"></span>
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129
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135
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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="n" style="color: #333;">hPutStringBuffer</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Handle</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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130
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136
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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell"><span class="n" style="color: #333;">hPutStringBuffer</span> <span class="n" style="color: #333;">hdl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">len</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span></span>
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131
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<pre style="margin: 0;">-<span id="LC131" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">plusForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC137" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">plusForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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132
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138
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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell"> <span class="n" style="color: #333;">hPutBuf</span> <span class="n" style="color: #333;">hdl</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">len</span></span>
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133
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139
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell"><span class="cd">-- | Skip the byte-order mark if there is one (see #1744 and #6016),</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -165,9 +171,9 @@ newUTF8StringBuffer buf ptr size = do</td>
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165
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171
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"><span class="n" style="color: #333;">appendStringBuffers</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span></span>
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172
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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell"><span class="n" style="color: #333;">appendStringBuffers</span> <span class="n" style="color: #333;">sb1</span> <span class="n" style="color: #333;">sb2</span></span>
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167
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173
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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">newBuf</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mallocForeignPtrArray</span> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">3</span><span class="p">)</span></span>
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168
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<pre style="margin: 0;">-<span id="LC168" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">newBuf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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169
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<pre style="margin: 0;">-<span id="LC169" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">sb1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">sb1Ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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170
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<pre style="margin: 0;">-<span id="LC170" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">sb2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">sb2Ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">newBuf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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175
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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">sb1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">sb1Ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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176
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="p">(</span><span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">sb2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">sb2Ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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171
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177
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">copyArray</span> <span class="n" style="color: #333;">ptr</span> <span class="p">(</span><span class="n" style="color: #333;">sb1Ptr</span> <span class="p">`</span><span class="n" style="color: #333;">advancePtr</span><span class="p">`</span> <span class="n" style="color: #333;">cur</span> <span class="n" style="color: #333;">sb1</span><span class="p">)</span> <span class="n" style="color: #333;">sb1_len</span></span>
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172
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178
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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"> <span class="n" style="color: #333;">copyArray</span> <span class="p">(</span><span class="n" style="color: #333;">ptr</span> <span class="p">`</span><span class="n" style="color: #333;">advancePtr</span><span class="p">`</span> <span class="n" style="color: #333;">sb1_len</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">sb2Ptr</span> <span class="p">`</span><span class="n" style="color: #333;">advancePtr</span><span class="p">`</span> <span class="n" style="color: #333;">cur</span> <span class="n" style="color: #333;">sb2</span><span class="p">)</span> <span class="n" style="color: #333;">sb2_len</span></span>
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173
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179
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"> <span class="n" style="color: #333;">pokeArray</span> <span class="p">(</span><span class="n" style="color: #333;">ptr</span> <span class="p">`</span><span class="n" style="color: #333;">advancePtr</span><span class="p">`</span> <span class="n" style="color: #333;">size</span><span class="p">)</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="mi" style="color: #099;">0</span><span class="p">]</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -184,7 +190,7 @@ stringToStringBuffer str =</td>
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184
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<pre style="margin: 0;"> <span id="LC190" class="line" lang="haskell"> <span class="n" style="color: #333;">unsafePerformIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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185
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191
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<pre style="margin: 0;"> <span id="LC191" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">utf8EncodedLength</span> <span class="n" style="color: #333;">str</span></span>
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186
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192
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<pre style="margin: 0;"> <span id="LC192" class="line" lang="haskell"> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mallocForeignPtrArray</span> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">3</span><span class="p">)</span></span>
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187
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<pre style="margin: 0;">-<span id="LC187" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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193
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<pre style="margin: 0;">+<span id="LC193" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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188
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194
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<pre style="margin: 0;"> <span id="LC194" class="line" lang="haskell"> <span class="n" style="color: #333;">utf8EncodeString</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">str</span></span>
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189
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195
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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell"> <span class="n" style="color: #333;">pokeArray</span> <span class="p">(</span><span class="n" style="color: #333;">ptr</span> <span class="p">`</span><span class="n" style="color: #333;">plusPtr</span><span class="p">`</span> <span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Word8</span><span class="p">)</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="mi" style="color: #099;">0</span><span class="p">]</span></span>
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190
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196
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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- sentinels for UTF-8 decoding</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -203,7 +209,7 @@ nextChar :: StringBuffer -> (Char,StringBuffer)</td>
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203
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209
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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell"><span class="n" style="color: #333;">nextChar</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">len</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">cur</span><span class="o" style="font-weight: 600;">#</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span></span>
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204
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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Getting our fingers dirty a little here, but this is performance-critical</span></span>
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205
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211
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<pre style="margin: 0;"> <span id="LC211" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span></span>
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206
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<pre style="margin: 0;">-<span id="LC206" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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207
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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">utf8DecodeCharAddr</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">#</span> <span class="p">`</span><span class="n" style="color: #333;">plusAddr</span><span class="o" style="font-weight: 600;">#</span><span class="p">`</span> <span class="n" style="color: #333;">cur</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">#</span> <span class="kr" style="font-weight: 600;">of</span></span>
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208
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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">c</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="n" style="color: #333;">nBytes</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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209
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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">cur'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="p">(</span><span class="n" style="color: #333;">cur</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">+#</span> <span class="n" style="color: #333;">nBytes</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">in</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -220,7 +226,7 @@ prevChar :: StringBuffer -> Char -> Char</td>
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220
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<pre style="margin: 0;"> <span id="LC226" class="line" lang="haskell"><span class="n" style="color: #333;">prevChar</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="n" style="color: #333;">deflt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">deflt</span></span>
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227
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<pre style="margin: 0;"> <span id="LC227" class="line" lang="haskell"><span class="n" style="color: #333;">prevChar</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span></span>
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222
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<pre style="margin: 0;"> <span id="LC228" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span></span>
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223
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<pre style="margin: 0;">-<span id="LC223" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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229
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<pre style="margin: 0;">+<span id="LC229" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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224
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<pre style="margin: 0;"> <span id="LC230" class="line" lang="haskell"> <span class="n" style="color: #333;">p'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">utf8PrevChar</span> <span class="p">(</span><span class="n" style="color: #333;">p</span> <span class="p">`</span><span class="n" style="color: #333;">plusPtr</span><span class="p">`</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span></span>
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225
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231
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<pre style="margin: 0;"> <span id="LC231" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="p">(</span><span class="n" style="color: #333;">utf8DecodeChar</span> <span class="n" style="color: #333;">p'</span><span class="p">))</span></span>
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226
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232
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<pre style="margin: 0;"> <span id="LC232" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="264" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -258,7 +264,7 @@ atEnd (StringBuffer _ l c) = l == c</td>
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258
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264
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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell"><span class="n" style="color: #333;">atLine</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span></span>
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259
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265
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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell"><span class="n" style="color: #333;">atLine</span> <span class="n" style="color: #333;">line</span> <span class="n" style="color: #333;">sb</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="n" style="color: #333;">len</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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260
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266
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<pre style="margin: 0;"> <span id="LC266" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span></span>
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261
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<pre style="margin: 0;">-<span id="LC261" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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267
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<pre style="margin: 0;">+<span id="LC267" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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262
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268
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<pre style="margin: 0;"> <span id="LC268" class="line" lang="haskell"> <span class="n" style="color: #333;">p'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">skipToLine</span> <span class="n" style="color: #333;">line</span> <span class="n" style="color: #333;">len</span> <span class="n" style="color: #333;">p</span></span>
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263
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269
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<pre style="margin: 0;"> <span id="LC269" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">p'</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">nullPtr</span></span>
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264
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270
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<pre style="margin: 0;"> <span id="LC270" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="315" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -309,14 +315,14 @@ lexemeToFastString :: StringBuffer</td>
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309
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<pre style="margin: 0;"> <span id="LC315" class="line" lang="haskell"><span class="n" style="color: #333;">lexemeToFastString</span> <span class="kr" style="font-weight: 600;">_</span> <span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nilFS</span></span>
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<pre style="margin: 0;"> <span id="LC316" class="line" lang="haskell"><span class="n" style="color: #333;">lexemeToFastString</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="n" style="color: #333;">len</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC317" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span></span>
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312
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<pre style="margin: 0;">-<span id="LC312" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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318
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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">-></span></span>
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313
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<pre style="margin: 0;"> <span id="LC319" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">mkFastStringBytes</span> <span class="p">(</span><span class="n" style="color: #333;">ptr</span> <span class="p">`</span><span class="n" style="color: #333;">plusPtr</span><span class="p">`</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="n" style="color: #333;">len</span></span>
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314
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320
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="haskell"></span>
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315
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell"><span class="cd">-- | Return the previous @n@ characters (or fewer if we are less than @n@</span></span>
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316
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322
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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- characters into the buffer.</span></span>
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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell"><span class="n" style="color: #333;">decodePrevNChars</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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318
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<pre style="margin: 0;"> <span id="LC324" class="line" lang="haskell"><span class="n" style="color: #333;">decodePrevNChars</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StringBuffer</span> <span class="n" style="color: #333;">buf</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">cur</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC319" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">w</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p0</span> <span class="o" style="font-weight: 600;">-></span></span>
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325
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<pre style="margin: 0;">+<span id="LC325" class="line" lang="haskell"> <span class="n" style="color: #333;">inlinePerformIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">unsafeW</span>ithForeignPtr</span> <span class="n" style="color: #333;">buf</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">p0</span> <span class="o" style="font-weight: 600;">-></span></span>
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320
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326
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<pre style="margin: 0;"> <span id="LC326" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">p0</span> <span class="n" style="color: #333;">n</span> <span class="s" style="color: #d14;">""</span> <span class="p">(</span><span class="n" style="color: #333;">p0</span> <span class="p">`</span><span class="n" style="color: #333;">plusPtr</span><span class="p">`</span> <span class="p">(</span><span class="n" style="color: #333;">cur</span> <span class="o" style="font-weight: 600;">-</span> <span class="mi" style="color: #099;">1</span><span class="p">))</span></span>
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321
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327
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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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322
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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Word8</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Word8</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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