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07c3cdd | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | <?php
/*
* $Id: SQLStatementExtractor.php,v 1.5 2004/07/27 23:13:46 hlellelid Exp $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information please see
* <http://creole.phpdb.org>.
*/
/**
* Static class for extracting SQL statements from a string or file.
*
* @author Hans Lellelid <hans@xmpl.org>
* @version $Revision: 1.5 $
* @package creole.util.sql
*/
class SQLStatementExtractor {
protected static $delimiter = ';';
/**
* Get SQL statements from file.
*
* @param string $filename Path to file to read.
* @return array SQL statements
*/
public static function extractFile($filename) {
$buffer = file_get_contents($filename);
if ($buffer === false) {
throw new Exception("Unable to read file: " . $filename);
}
return self::extractStatements(self::getLines($buffer));
}
/**
* Extract statements from string.
*
* @param string $txt
* @return array
*/
public static function extract($buffer) {
return self::extractStatements(self::getLines($buffer));
}
/**
* Extract SQL statements from array of lines.
*
* @param array $lines Lines of the read-in file.
* @return string
*/
protected static function extractStatements($lines) {
$statements = array();
$sql = "";
foreach($lines as $line) {
$line = trim($line);
if (self::startsWith("//", $line) ||
self::startsWith("--", $line) ||
self::startsWith("#", $line)) {
continue;
}
if (strlen($line) > 4 && strtoupper(substr($line,0, 4)) == "REM ") {
continue;
}
$sql .= " " . $line;
$sql = trim($sql);
// SQL defines "--" as a comment to EOL
// and in Oracle it may contain a hint
// so we cannot just remove it, instead we must end it
if (strpos($line, "--") !== false) {
$sql .= "\n";
}
if (self::endsWith(self::$delimiter, $sql)) {
$statements[] = self::substring($sql, 0, strlen($sql)-1 - strlen(self::$delimiter));
$sql = "";
}
}
return $statements;
}
//
// Some string helper methods
//
/**
* Tests if a string starts with a given string.
* @param string $check The substring to check.
* @param string $string The string to check in (haystack).
* @return boolean True if $string starts with $check, or they are equal, or $check is empty.
*/
protected static function startsWith($check, $string) {
if ($check === "" || $check === $string) {
return true;
} else {
return (strpos($string, $check) === 0) ? true : false;
}
}
/**
* Tests if a string ends with a given string.
* @param string $check The substring to check.
* @param string $string The string to check in (haystack).
* @return boolean True if $string ends with $check, or they are equal, or $check is empty.
*/
protected static function endsWith($check, $string) {
if ($check === "" || $check === $string) {
return true;
} else {
return (strpos(strrev($string), strrev($check)) === 0) ? true : false;
}
}
/**
* a natural way of getting a subtring, php's circular string buffer and strange
* return values suck if you want to program strict as of C or friends
*/
protected static function substring($string, $startpos, $endpos = -1) {
$len = strlen($string);
$endpos = (int) (($endpos === -1) ? $len-1 : $endpos);
if ($startpos > $len-1 || $startpos < 0) {
trigger_error("substring(), Startindex out of bounds must be 0<n<$len", E_USER_ERROR);
}
if ($endpos > $len-1 || $endpos < $startpos) {
trigger_error("substring(), Endindex out of bounds must be $startpos<n<".($len-1), E_USER_ERROR);
}
if ($startpos === $endpos) {
return (string) $string{$startpos};
} else {
$len = $endpos-$startpos;
}
return substr($string, $startpos, $len+1);
}
/**
* Convert string buffer into array of lines.
*
* @param string $filename
* @return array string[] lines of file.
*/
protected static function getLines($buffer) {
$lines = preg_split("/\r?\n|\r/", $buffer);
return $lines;
}
} |