From fcb163fb8c81651d9ee0afe289ab13e9573a66cb Mon Sep 17 00:00:00 2001
From: Alexandr Jeliuc <a2xchip@gmail.com>
Date: Thu, 15 Dec 2016 04:38:58 +0200
Subject: [PATCH] Make max read bytes per line configurable

- Remove max read bytes constant
- Update reader, reader options, row iterator adding max read bytes properties
- Add test data
- Update tests
---
 src/Spout/Reader/CSV/Reader.php             | 11 ++++++++
 src/Spout/Reader/CSV/ReaderOptions.php      | 28 +++++++++++++++++++++
 src/Spout/Reader/CSV/RowIterator.php        |  8 +++---
 tests/Spout/Reader/CSV/ReaderTest.php       | 26 +++++++++++++++++--
 tests/resources/csv/csv_with_long_lines.csv |  1 +
 5 files changed, 68 insertions(+), 6 deletions(-)
 create mode 100644 tests/resources/csv/csv_with_long_lines.csv

diff --git a/src/Spout/Reader/CSV/Reader.php b/src/Spout/Reader/CSV/Reader.php
index 648a12d..71f308e 100644
--- a/src/Spout/Reader/CSV/Reader.php
+++ b/src/Spout/Reader/CSV/Reader.php
@@ -87,6 +87,17 @@ class Reader extends AbstractReader
         return $this;
     }
 
+    /**
+     * Set maximum bytes to read per line
+     * @param $maxReadBytesPerLine
+     * @return Reader
+     */
+    public function setMaxReadBytesPerLine($maxReadBytesPerLine)
+    {
+        $this->getOptions()->setMaxReadBytesPerLine($maxReadBytesPerLine);
+        return $this;
+    }
+
     /**
      * Returns whether stream wrappers are supported
      *
diff --git a/src/Spout/Reader/CSV/ReaderOptions.php b/src/Spout/Reader/CSV/ReaderOptions.php
index 9a1adb8..4b5cbc7 100644
--- a/src/Spout/Reader/CSV/ReaderOptions.php
+++ b/src/Spout/Reader/CSV/ReaderOptions.php
@@ -24,6 +24,12 @@ class ReaderOptions extends \Box\Spout\Reader\Common\ReaderOptions
     /** @var string Defines the End of line */
     protected $endOfLineCharacter = "\n";
 
+    /**
+     * Alignment with other functions like fgets() is discussed here: https://bugs.php.net/bug.php?id=48421
+     * @var int Number of bytes to read
+     */
+    protected $maxReadBytesPerLine = 32768;
+
     /**
      * @return string
      */
@@ -107,4 +113,26 @@ class ReaderOptions extends \Box\Spout\Reader\Common\ReaderOptions
         $this->endOfLineCharacter = $endOfLineCharacter;
         return $this;
     }
+
+    /**
+     * Sets maximum bytes to read in line
+     *
+     * @param int $maxReadBytesPerLine
+     * @return ReaderOptions
+     */
+    public function setMaxReadBytesPerLine($maxReadBytesPerLine)
+    {
+        $this->maxReadBytesPerLine = $maxReadBytesPerLine;
+        return $this;
+    }
+
+    /**
+     * Gets maximum bytes to read in line
+     *
+     * @return int
+     */
+    public function getMaxReadBytesPerLine()
+    {
+        return $this->maxReadBytesPerLine;
+    }
 }
diff --git a/src/Spout/Reader/CSV/RowIterator.php b/src/Spout/Reader/CSV/RowIterator.php
index 7aa29ab..4b7c5ab 100644
--- a/src/Spout/Reader/CSV/RowIterator.php
+++ b/src/Spout/Reader/CSV/RowIterator.php
@@ -14,10 +14,9 @@ use Box\Spout\Common\Helper\EncodingHelper;
 class RowIterator implements IteratorInterface
 {
     /**
-     * If no value is given to fgetcsv(), it defaults to 8192 (which may be too low).
-     * Alignement with other functions like fgets() is discussed here: https://bugs.php.net/bug.php?id=48421
+     * @var int Number of bytes to read
      */
-    const MAX_READ_BYTES_PER_LINE = 32768;
+    protected $maxReadBytesPerLine;
 
     /** @var resource Pointer to the CSV file to read */
     protected $filePointer;
@@ -67,6 +66,7 @@ class RowIterator implements IteratorInterface
         $this->fieldEnclosure = $options->getFieldEnclosure();
         $this->encoding = $options->getEncoding();
         $this->inputEOLDelimiter = $options->getEndOfLineCharacter();
+        $this->maxReadBytesPerLine = $options->getMaxReadBytesPerLine();
         $this->shouldPreserveEmptyRows = $options->shouldPreserveEmptyRows();
         $this->globalFunctionsHelper = $globalFunctionsHelper;
 
@@ -177,7 +177,7 @@ class RowIterator implements IteratorInterface
      */
     protected function getNextUTF8EncodedRow()
     {
-        $encodedRowData = $this->globalFunctionsHelper->fgetcsv($this->filePointer, self::MAX_READ_BYTES_PER_LINE, $this->fieldDelimiter, $this->fieldEnclosure);
+        $encodedRowData = $this->globalFunctionsHelper->fgetcsv($this->filePointer, $this->maxReadBytesPerLine, $this->fieldDelimiter, $this->fieldEnclosure);
         if ($encodedRowData === false) {
             return false;
         }
diff --git a/tests/Spout/Reader/CSV/ReaderTest.php b/tests/Spout/Reader/CSV/ReaderTest.php
index 429ffa6..994f647 100644
--- a/tests/Spout/Reader/CSV/ReaderTest.php
+++ b/tests/Spout/Reader/CSV/ReaderTest.php
@@ -428,6 +428,26 @@ class ReaderTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals($expectedRows, $allRows, 'Cell values should not be trimmed');
     }
 
+    /**
+     * maxReadBytesPerLine should be configurable
+     * @return void
+     */
+    public function testShouldReadLinesOfAnySize()
+    {
+        $allColumns = $this->getAllRowsForFile(
+            'csv_with_long_lines.csv',
+            ';',
+            '"',
+            "\n",
+            EncodingHelper::ENCODING_UTF8,
+            false,
+            (1.5 * 1024 * 1024)
+        )[0];
+
+        $expectedNumOfColumns = 4;
+        $this->assertEquals($expectedNumOfColumns, count($allColumns));
+    }
+
     /**
      * @param string $fileName
      * @param string|void $fieldDelimiter
@@ -443,8 +463,9 @@ class ReaderTest extends \PHPUnit_Framework_TestCase
         $fieldEnclosure = '"',
         $endOfLineCharacter = "\n",
         $encoding = EncodingHelper::ENCODING_UTF8,
-        $shouldPreserveEmptyRows = false)
-    {
+        $shouldPreserveEmptyRows = false,
+        $maxReadBytesPerLine = 32768
+    ) {
         $allRows = [];
         $resourcePath = $this->getResourcePath($fileName);
 
@@ -456,6 +477,7 @@ class ReaderTest extends \PHPUnit_Framework_TestCase
             ->setEndOfLineCharacter($endOfLineCharacter)
             ->setEncoding($encoding)
             ->setShouldPreserveEmptyRows($shouldPreserveEmptyRows)
+            ->setMaxReadBytesPerLine($maxReadBytesPerLine)
             ->open($resourcePath);
 
         foreach ($reader->getSheetIterator() as $sheetIndex => $sheet) {
diff --git a/tests/resources/csv/csv_with_long_lines.csv b/tests/resources/csv/csv_with_long_lines.csv
new file mode 100644
index 0000000..1bec452
--- /dev/null
+++ b/tests/resources/csv/csv_with_long_lines.csv
@@ -0,0 +1 @@
+multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi 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multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi 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multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi 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multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi 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multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi multi 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