Fix GH-18753: file_get_contents() fails with files >=2GB on macOS & BSD

Author: kiler129

ext/standard/tests/file/gh18753.phpt

@@ -0,0 +1,26 @@
+--TEST--
+GH-18753 (file_get_contents() fails with files >=2GB on macOS & BSD)
+--CREDITS--
+Gregory House <[email protected]>
+--INI--
+memory_limit=-1
+--SKIPIF--
+<?php
+if (PHP_OS_FAMILY !== 'Darwin' && PHP_OS_FAMILY !== 'BSD') die('skip is not macOS or BSD');
+if (PHP_INT_SIZE !== 8) die("skip 64-bit only");
+if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
+?>
+--FILE--
+<?php
+$fp = fopen('bigfile', 'w');
+ftruncate($fp, 2 * 1024 * 1024 * 1024);
+fclose($fp);
+
+echo strlen(file_get_contents('bigfile'));
+?>
+--CLEAN--
+<?php
+unlink('bigfile');
+?>
+--EXPECT--
+2147483648

main/streams/plain_wrapper.c

@@ -53,12 +53,16 @@ extern int php_get_uid_by_name(const char *name, uid_t *uid);
 extern int php_get_gid_by_name(const char *name, gid_t *gid);
 #endif
 
-#if defined(PHP_WIN32)
+#if defined(PHP_WIN32) || defined(__APPLE__) || defined(__MACH__) || defined(BSD) || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
 # define PLAIN_WRAP_BUF_SIZE(st) ((unsigned int)(st > INT_MAX ? INT_MAX : st))
+#else
+# define PLAIN_WRAP_BUF_SIZE(st) (st)
+#endif
+
+#if defined(PHP_WIN32)
 #define fsync _commit
 #define fdatasync fsync
 #else
-# define PLAIN_WRAP_BUF_SIZE(st) (st)
 # if !defined(HAVE_FDATASYNC)
 #  define fdatasync fsync
 # elif defined(__APPLE__)