Fix phpGH-13119 (php#13125)

Fixed an issue where pdo_firebird float and double type values were wrong.

Changed from using `%F` format with `zend_strpprintf` to using `%H` format with
`zend_strpprintf_unchecked`.

Fixes phpGH-13119
Closes phpGH-13125

Author: SakiTakamachi

NEWS

@@ -14,6 +14,10 @@ PHP                                                                        NEWS
   . Fixed LibreSSL undefined reference when OPENSSL_NO_ENGINE not set.
    (David Carlier).
 
+- PDO_Firebird:
+  . Fix GH-13119 (Changed to convert float and double values ​​into strings using
+    `H` format). (SakiTakamachi)
+
 - Phar:
   . Fixed bug #71465 (PHAR doesn't know about litespeed). (nielsdos)
 

ext/pdo_firebird/firebird_statement.c

@@ -51,6 +51,11 @@ static zend_always_inline double get_double_from_sqldata(const ISC_SCHAR *sqldat
 	READ_AND_RETURN_USING_MEMCPY(double, sqldata);
 }
 
+static zend_always_inline float get_float_from_sqldata(const ISC_SCHAR *sqldata)
+{
+	READ_AND_RETURN_USING_MEMCPY(float, sqldata);
+}
+
 static zend_always_inline ISC_TIMESTAMP get_isc_timestamp_from_sqldata(const ISC_SCHAR *sqldata)
 {
 	READ_AND_RETURN_USING_MEMCPY(ISC_TIMESTAMP, sqldata);
@@ -459,11 +464,11 @@ static int firebird_stmt_get_col(
 					break;
 				case SQL_FLOAT:
 					/* TODO: Why is this not returned as the native type? */
-					ZVAL_STR(result, zend_strpprintf(0, "%F", *(float*)var->sqldata));
+					ZVAL_STR(result, zend_strpprintf_unchecked(0, "%.8H", get_float_from_sqldata(var->sqldata)));
 					break;
 				case SQL_DOUBLE:
 					/* TODO: Why is this not returned as the native type? */
-					ZVAL_STR(result, zend_strpprintf(0, "%F", get_double_from_sqldata(var->sqldata)));
+					ZVAL_STR(result, zend_strpprintf_unchecked(0, "%.16H", get_double_from_sqldata(var->sqldata)));
 					break;
 #ifdef SQL_BOOLEAN
 				case SQL_BOOLEAN:

ext/pdo_firebird/tests/gh10908.phpt

@@ -79,8 +79,8 @@ Array
 
 Array
 (
-    [DBL] => 1.000000
-    [0] => 1.000000
+    [DBL] => 1
+    [0] => 1
 )
 
 Array
@@ -103,10 +103,10 @@ Array
     [1] => ABC
     [NUM] => 12.340
     [2] => 12.340
-    [DBL] => 1.000000
-    [3] => 1.000000
-    [FLT] => 2.000000
-    [4] => 2.000000
+    [DBL] => 1
+    [3] => 1
+    [FLT] => 2
+    [4] => 2
     [TS] => 2023-03-24 17:39:00
     [5] => 2023-03-24 17:39:00
     [MYDATE] => 2023-03-24

ext/pdo_firebird/tests/gh13119.phpt

@@ -0,0 +1,77 @@
+--TEST--
+GH-13119 (float, double value is incorrect)
+--EXTENSIONS--
+pdo_firebird
+--SKIPIF--
+<?php require('skipif.inc'); ?>
+--XLEAK--
+A bug in firebird causes a memory leak when calling `isc_attach_database()`.
+See https://github.com/FirebirdSQL/firebird/issues/7849
+--FILE--
+<?php
+
+require("testdb.inc");
+
+$dbh->exec('CREATE TABLE gh13119 (f_val FLOAT, d_val DOUBLE PRECISION)');
+
+$dbh->exec('INSERT INTO gh13119 VALUES (0.1, 0.1)');
+$dbh->exec('INSERT INTO gh13119 VALUES (0.0000000000000001, 0.0000000000000001)');
+$dbh->exec('INSERT INTO gh13119 VALUES (12.000000, 12.00000000000000)');
+$dbh->exec('INSERT INTO gh13119 VALUES (12.000001, 12.00000000000001)');
+$dbh->exec('INSERT INTO gh13119 VALUES (12.345678, 12.34567890123456)');
+$dbh->exec('INSERT INTO gh13119 VALUES (0.0000000000000000012345678, 0.000000000000000001234567890123456)');
+
+$stmt = $dbh->query('select * from gh13119');
+var_dump($stmt->fetchAll(PDO::FETCH_ASSOC));
+?>
+--CLEAN--
+<?php
+require 'testdb.inc';
+@$dbh->exec('DROP TABLE gh13119');
+unset($dbh);
+?>
+--EXPECT--
+array(6) {
+  [0]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(3) "0.1"
+    ["D_VAL"]=>
+    string(3) "0.1"
+  }
+  [1]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(7) "1.0E-16"
+    ["D_VAL"]=>
+    string(7) "1.0E-16"
+  }
+  [2]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(2) "12"
+    ["D_VAL"]=>
+    string(2) "12"
+  }
+  [3]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(9) "12.000001"
+    ["D_VAL"]=>
+    string(17) "12.00000000000001"
+  }
+  [4]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(9) "12.345678"
+    ["D_VAL"]=>
+    string(17) "12.34567890123456"
+  }
+  [5]=>
+  array(2) {
+    ["F_VAL"]=>
+    string(13) "1.2345678E-18"
+    ["D_VAL"]=>
+    string(21) "1.234567890123456E-18"
+  }
+}