/*
  +----------------------------------------------------------------------+
  | Copyright © The PHP Group and Contributors.                          |
  +----------------------------------------------------------------------+
  | This source file is subject to the Modified BSD License that is      |
  | bundled with this package in the file LICENSE, and is available      |
  | through the World Wide Web at <https://www.php.net/license/>.        |
  |                                                                      |
  | SPDX-License-Identifier: BSD-3-Clause                                |
  +----------------------------------------------------------------------+
  | Authors: Wez Furlong <wez@thebrainroom.com>                          |
  |          Sara Golemon <pollita@php.net>                              |
  +----------------------------------------------------------------------+
*/

#include "php.h"
#include "ext/standard/flock_compat.h"
#include "ext/standard/file.h"
#include "ext/standard/basic_functions.h"
#include "php_ini.h"
#include "streamsfuncs.h"
#include "php_network.h"
#include "php_string.h"
#include "streams/php_streams_int.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifndef PHP_WIN32
#define php_select(m, r, w, e, t)	select(m, r, w, e, t)
typedef unsigned long long php_timeout_ull;
#else
#include "win32/select.h"
#include "win32/sockets.h"
#include "win32/console.h"
typedef unsigned __int64 php_timeout_ull;
#endif

#define GET_CTX_OPT(stream, wrapper, name, val) (PHP_STREAM_CONTEXT(stream) && NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), wrapper, name)))

static php_stream_context *decode_context_param(zval *contextresource);

/* Streams based network functions */

#ifdef HAVE_SOCKETPAIR
/* {{{ Creates a pair of connected, indistinguishable socket streams */
PHP_FUNCTION(stream_socket_pair)
{
	zend_long domain, type, protocol;
	php_stream *s1, *s2;
	php_socket_t pair[2];
	zval *zcontext = NULL;
	php_stream_context *context = NULL;

	ZEND_PARSE_PARAMETERS_START(3, 4)
		Z_PARAM_LONG(domain)
		Z_PARAM_LONG(type)
		Z_PARAM_LONG(protocol)
		Z_PARAM_OPTIONAL
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	if (0 != socketpair((int)domain, (int)type, (int)protocol, pair)) {
		char errbuf[256];
		php_error_docref(NULL, E_WARNING, "Failed to create sockets: [%d]: %s",
			php_socket_errno(), php_socket_strerror(php_socket_errno(), errbuf, sizeof(errbuf)));
		RETURN_FALSE;
	}

	php_stream_error_operation_begin();
	context = php_stream_context_from_zval(zcontext, 0);

    s1 = php_stream_sock_open_from_socket(pair[0], 0);
    if (s1 == NULL) {
        close(pair[0]);
        close(pair[1]);
		php_stream_error_operation_end(context);
        php_error_docref(NULL, E_WARNING, "Failed to open stream from socketpair");
        RETURN_FALSE;
    }
    s2 = php_stream_sock_open_from_socket(pair[1], 0);
    if (s2 == NULL) {
        php_stream_free(s1, PHP_STREAM_FREE_CLOSE);
        close(pair[1]);
		php_stream_error_operation_end(context);
        php_error_docref(NULL, E_WARNING, "Failed to open stream from socketpair");
        RETURN_FALSE;
    }

    array_init(return_value);

	/* set the __exposed flag.
	 * php_stream_to_zval() does, add_next_index_resource() does not */
	php_stream_auto_cleanup(s1);
	php_stream_auto_cleanup(s2);

	add_next_index_resource(return_value, s1->res);
	add_next_index_resource(return_value, s2->res);

	php_stream_error_operation_end(context);
}
/* }}} */
#endif

/* {{{ Open a client connection to a remote address */
PHP_FUNCTION(stream_socket_client)
{
	zend_string *host;
	zval *zerrno = NULL, *zerrstr = NULL, *zcontext = NULL;
	double timeout;
	bool timeout_is_null = 1;
	struct timeval tv;
	char *hashkey = NULL;
	php_stream *stream = NULL;
	int err;
	zend_long flags = PHP_STREAM_CLIENT_CONNECT;
	zend_string *errstr = NULL;
	php_stream_context *context = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 6)
		Z_PARAM_STR(host)
		Z_PARAM_OPTIONAL
		Z_PARAM_ZVAL(zerrno)
		Z_PARAM_ZVAL(zerrstr)
		Z_PARAM_DOUBLE_OR_NULL(timeout, timeout_is_null)
		Z_PARAM_LONG(flags)
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	RETVAL_FALSE;

	if (timeout_is_null) {
		timeout = (double)FG(default_socket_timeout);
	} else if (!zend_finite(timeout)) {
		zend_argument_value_error(4, "must be a finite value");
		RETURN_THROWS();
	}

	php_stream_error_operation_begin();
	context = php_stream_context_from_zval(zcontext, flags & PHP_FILE_NO_DEFAULT_CONTEXT);

	if (flags & PHP_STREAM_CLIENT_PERSISTENT) {
		zend_string *escaped = php_stream_escape_persistent_key(ZSTR_VAL(host), ZSTR_LEN(host));
		spprintf(&hashkey, 0, "stream_socket_client__%s", ZSTR_VAL(escaped));
		zend_string_release_ex(escaped, false);
	}

	/* prepare the timeout value for use */
	struct timeval *tv_pointer;
	if (timeout < 0.0 || timeout >= (double) PHP_TIMEOUT_ULL_MAX / 1000000.0) {
		tv_pointer = NULL;
	} else {
		php_timeout_ull conv = (php_timeout_ull) (timeout * 1000000.0);
#ifdef PHP_WIN32
		tv.tv_sec = (long)(conv / 1000000);
		tv.tv_usec = (long)(conv % 1000000);
#else
		tv.tv_sec = conv / 1000000;
		tv.tv_usec = conv % 1000000;
#endif
		tv_pointer = &tv;
	}

	if (zerrno) {
		ZEND_TRY_ASSIGN_REF_LONG(zerrno, 0);
	}
	if (zerrstr) {
		ZEND_TRY_ASSIGN_REF_EMPTY_STRING(zerrstr);
	}

	stream = php_stream_xport_create(ZSTR_VAL(host), ZSTR_LEN(host), REPORT_ERRORS,
			STREAM_XPORT_CLIENT | (flags & PHP_STREAM_CLIENT_CONNECT ? STREAM_XPORT_CONNECT : 0) |
			(flags & PHP_STREAM_CLIENT_ASYNC_CONNECT ? STREAM_XPORT_CONNECT_ASYNC : 0),
			hashkey, tv_pointer, context, &errstr, &err);

	php_stream_error_operation_end(context);

	if (stream == NULL) {
		/* host might contain binary characters */
		zend_string *quoted_host = php_addslashes(host);

		php_error_docref(NULL, E_WARNING, "Unable to connect to %s (%s)", ZSTR_VAL(quoted_host), errstr == NULL ? "Unknown error" : ZSTR_VAL(errstr));
		zend_string_release_ex(quoted_host, 0);
	}

	if (hashkey) {
		efree(hashkey);
	}

	if (stream == NULL) {
		if (zerrno) {
			ZEND_TRY_ASSIGN_REF_LONG(zerrno, err);
		}
		if (zerrstr && errstr) {
			ZEND_TRY_ASSIGN_REF_STR(zerrstr, errstr);
		} else if (errstr) {
			zend_string_release_ex(errstr, 0);
		}
		RETURN_FALSE;
	}

	if (errstr) {
		zend_string_release_ex(errstr, 0);
	}

	php_stream_to_zval(stream, return_value);

}
/* }}} */

/* {{{ Create a server socket bound to localaddress */
PHP_FUNCTION(stream_socket_server)
{
	char *host;
	size_t host_len;
	zval *zerrno = NULL, *zerrstr = NULL, *zcontext = NULL;
	php_stream *stream = NULL;
	int err = 0;
	zend_long flags = STREAM_XPORT_BIND | STREAM_XPORT_LISTEN;
	zend_string *errstr = NULL;
	php_stream_context *context = NULL;

	RETVAL_FALSE;

	ZEND_PARSE_PARAMETERS_START(1, 5)
		Z_PARAM_STRING(host, host_len)
		Z_PARAM_OPTIONAL
		Z_PARAM_ZVAL(zerrno)
		Z_PARAM_ZVAL(zerrstr)
		Z_PARAM_LONG(flags)
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();
	context = php_stream_context_from_zval(zcontext, flags & PHP_FILE_NO_DEFAULT_CONTEXT);

	if (zerrno) {
		ZEND_TRY_ASSIGN_REF_LONG(zerrno, 0);
	}
	if (zerrstr) {
		ZEND_TRY_ASSIGN_REF_EMPTY_STRING(zerrstr);
	}

	stream = php_stream_xport_create(host, host_len, REPORT_ERRORS,
			STREAM_XPORT_SERVER | (int)flags,
			NULL, NULL, context, &errstr, &err);

	php_stream_error_operation_end(context);

	if (stream == NULL) {
		php_error_docref(NULL, E_WARNING, "Unable to connect to %s (%s)", host, errstr == NULL ? "Unknown error" : ZSTR_VAL(errstr));
	}

	if (stream == NULL) {
		if (zerrno) {
			ZEND_TRY_ASSIGN_REF_LONG(zerrno, err);
		}
		if (zerrstr && errstr) {
			ZEND_TRY_ASSIGN_REF_STR(zerrstr, errstr);
		} else if (errstr) {
			zend_string_release_ex(errstr, 0);
		}
		RETURN_FALSE;
	}

	if (errstr) {
		zend_string_release_ex(errstr, 0);
	}

	php_stream_to_zval(stream, return_value);
}
/* }}} */

/* {{{ Accept a client connection from a server socket */
PHP_FUNCTION(stream_socket_accept)
{
	double timeout;
	bool timeout_is_null = 1;
	zval *zpeername = NULL;
	zend_string *peername = NULL;
	struct timeval tv;
	php_stream *stream = NULL, *clistream = NULL;
	zend_string *errstr = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 3)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_OPTIONAL
		Z_PARAM_DOUBLE_OR_NULL(timeout, timeout_is_null)
		Z_PARAM_ZVAL(zpeername)
	ZEND_PARSE_PARAMETERS_END();

	if (timeout_is_null) {
		timeout = (double)FG(default_socket_timeout);
	} else if (!zend_finite(timeout)) {
		zend_argument_value_error(2, "must be a finite value");
		RETURN_THROWS();
	}

	/* prepare the timeout value for use */
	struct timeval *tv_pointer;
	if (timeout < 0.0 || timeout >= (double) PHP_TIMEOUT_ULL_MAX / 1000000.0) {
		tv_pointer = NULL;
	} else {
		php_timeout_ull conv = (php_timeout_ull) (timeout * 1000000.0);
#ifdef PHP_WIN32
		tv.tv_sec = (long)(conv / 1000000);
		tv.tv_usec = (long)(conv % 1000000);
#else
		tv.tv_sec = conv / 1000000;
		tv.tv_usec = conv % 1000000;
#endif
		tv_pointer = &tv;
	}

	php_stream_error_operation_begin();

	if (0 == php_stream_xport_accept(stream, &clistream,
				zpeername ? &peername : NULL,
				NULL, NULL,
				tv_pointer, &errstr
				) && clistream) {

		if (peername) {
			ZEND_TRY_ASSIGN_REF_STR(zpeername, peername);
		}
		php_stream_to_zval(clistream, return_value);
	} else {
		if (peername) {
			zend_string_release(peername);
		}
		php_stream_warn(stream, AcceptFailed, "Accept failed: %s", errstr ? ZSTR_VAL(errstr) : "Unknown error");
		RETVAL_FALSE;
	}

	php_stream_error_operation_end_for_stream(stream);

	if (errstr) {
		zend_string_release_ex(errstr, 0);
	}
}
/* }}} */

/* {{{ Returns either the locally bound or remote name for a socket stream */
PHP_FUNCTION(stream_socket_get_name)
{
	php_stream *stream;
	bool want_peer;
	zend_string *name = NULL;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_BOOL(want_peer)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();
	int ret = php_stream_xport_get_name(stream, want_peer, &name, NULL, NULL);
	php_stream_error_operation_end_for_stream(stream);

	if (0 != ret || !name) {
		RETURN_FALSE;
	}

	if ((ZSTR_LEN(name) == 0) || (ZSTR_VAL(name)[0] == 0)) {
		zend_string_release_ex(name, 0);
		RETURN_FALSE;
	}

	RETVAL_STR(name);
}
/* }}} */

/* {{{ Send data to a socket stream.  If target_addr is specified it must be in dotted quad (or [ipv6]) format */
PHP_FUNCTION(stream_socket_sendto)
{
	php_stream *stream;
	zend_long flags = 0;
	char *data, *target_addr = NULL;
	size_t datalen, target_addr_len = 0;
	php_sockaddr_storage sa;
	socklen_t sl = 0;

	ZEND_PARSE_PARAMETERS_START(2, 4)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_STRING(data, datalen)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(flags)
		Z_PARAM_STRING(target_addr, target_addr_len)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();
	if (target_addr_len) {
		/* parse the address */
		if (FAILURE == php_network_parse_network_address_with_port(target_addr, target_addr_len, (struct sockaddr*)&sa, &sl)) {
			php_stream_error_operation_end_for_stream(stream);
			php_error_docref(NULL, E_WARNING, "Failed to parse `%s' into a valid network address", target_addr);
			RETURN_FALSE;
		}
	}

	RETVAL_LONG(php_stream_xport_sendto(stream, data, datalen, (int)flags, target_addr_len ? &sa : NULL, sl));
	php_stream_error_operation_end_for_stream(stream);
}
/* }}} */

/* {{{ Receives data from a socket stream */
PHP_FUNCTION(stream_socket_recvfrom)
{
	php_stream *stream;
	zval *zremote = NULL;
	zend_string *remote_addr = NULL;
	zend_long to_read = 0;
	zend_string *read_buf;
	zend_long flags = 0;
	int recvd;

	ZEND_PARSE_PARAMETERS_START(2, 4)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(to_read)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(flags)
		Z_PARAM_ZVAL(zremote)
	ZEND_PARSE_PARAMETERS_END();

	if (zremote) {
		ZEND_TRY_ASSIGN_REF_NULL(zremote);
	}

	if (to_read <= 0) {
		zend_argument_value_error(2, "must be greater than 0");
		RETURN_THROWS();
	}

	read_buf = zend_string_alloc(to_read, 0);

	php_stream_error_operation_begin();
	recvd = php_stream_xport_recvfrom(stream, ZSTR_VAL(read_buf), to_read, (int)flags, NULL, NULL,
			zremote ? &remote_addr : NULL);
	php_stream_error_operation_end_for_stream(stream);

	if (recvd >= 0) {
		if (zremote && remote_addr) {
			ZEND_TRY_ASSIGN_REF_STR(zremote, remote_addr);
		}
		ZSTR_VAL(read_buf)[recvd] = '\0';
		ZSTR_LEN(read_buf) = recvd;
		RETURN_NEW_STR(read_buf);
	}

	zend_string_efree(read_buf);
	RETURN_FALSE;
}
/* }}} */

/* {{{ Reads all remaining bytes (or up to maxlen bytes) from a stream and returns them as a string. */
PHP_FUNCTION(stream_get_contents)
{
	php_stream *stream;
	zend_long maxlen, desiredpos = -1L;
	bool maxlen_is_null = 1;
	zend_string *contents;

	ZEND_PARSE_PARAMETERS_START(1, 3)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(maxlen, maxlen_is_null)
		Z_PARAM_LONG(desiredpos)
	ZEND_PARSE_PARAMETERS_END();

	if (maxlen_is_null) {
		maxlen = (ssize_t) PHP_STREAM_COPY_ALL;
	} else if (maxlen < 0 && maxlen != (ssize_t)PHP_STREAM_COPY_ALL) {
		zend_argument_value_error(2, "must be greater than or equal to -1");
		RETURN_THROWS();
	}

	php_stream_error_operation_begin();

	if (desiredpos >= 0) {
		int		seek_res = 0;
		zend_off_t	position;

		position = php_stream_tell(stream);
		if (position >= 0 && desiredpos > position) {
			/* use SEEK_CUR to allow emulation in streams that don't support seeking */
			seek_res = php_stream_seek(stream, desiredpos - position, SEEK_CUR);
		} else if (desiredpos < position)  {
			/* desired position before position or error on tell */
			seek_res = php_stream_seek(stream, desiredpos, SEEK_SET);
		}

		if (seek_res != 0) {
			php_stream_error_operation_end_for_stream(stream);
			php_error_docref(NULL, E_WARNING,
				"Failed to seek to position " ZEND_LONG_FMT " in the stream", desiredpos);
			RETURN_FALSE;
		}
	}

	if ((contents = php_stream_copy_to_mem(stream, maxlen, 0))) {
		RETVAL_STR(contents);
	} else {
		RETVAL_EMPTY_STRING();
	}
	php_stream_error_operation_end_for_stream(stream);
}
/* }}} */

/* {{{ Reads up to maxlen bytes from source stream and writes them to dest stream. */
PHP_FUNCTION(stream_copy_to_stream)
{
	php_stream *src, *dest;
	zend_long maxlen, pos = 0;
	bool maxlen_is_null = 1;
	size_t len;
	zval *zcontext = NULL;
	php_stream_context *context = NULL;

	ZEND_PARSE_PARAMETERS_START(2, 5)
		PHP_Z_PARAM_STREAM(src)
		PHP_Z_PARAM_STREAM(dest)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(maxlen, maxlen_is_null)
		Z_PARAM_LONG(pos)
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	if (maxlen_is_null) {
		maxlen = PHP_STREAM_COPY_ALL;
	}

	php_stream_error_operation_begin();
	context = php_stream_context_from_zval(zcontext, 0);

	if (pos > 0 && php_stream_seek(src, pos, SEEK_SET) < 0) {
		php_stream_error_operation_end(context);
		php_error_docref(NULL, E_WARNING, "Failed to seek to position " ZEND_LONG_FMT " in the stream", pos);
		RETURN_FALSE;
	}

	if (php_stream_copy_to_stream_ex(src, dest, maxlen, &len) != SUCCESS) {
		RETVAL_FALSE;
	} else {
		RETVAL_LONG(len);
	}
	php_stream_error_operation_end(context);
}
/* }}} */

/* {{{ Retrieves header/meta data from streams/file pointers */
PHP_FUNCTION(stream_get_meta_data)
{
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		PHP_Z_PARAM_STREAM(stream)
	ZEND_PARSE_PARAMETERS_END();

	array_init(return_value);

	php_stream_error_operation_begin();
	if (!php_stream_populate_meta_data(stream, return_value)) {
		add_assoc_bool(return_value, "timed_out", 0);
		add_assoc_bool(return_value, "blocked", 1);
		add_assoc_bool(return_value, "eof", php_stream_eof(stream));
	}
	php_stream_error_operation_end_for_stream(stream);

	if (!Z_ISUNDEF(stream->wrapperdata)) {
		Z_ADDREF_P(&stream->wrapperdata);
		add_assoc_zval(return_value, "wrapper_data", &stream->wrapperdata);
	}
	if (stream->wrapper) {
		add_assoc_string(return_value, "wrapper_type", stream->wrapper->wops->label);
	}
	add_assoc_string(return_value, "stream_type", stream->ops->label);

	add_assoc_string(return_value, "mode", stream->mode);

#if 0	/* TODO: needs updating for new filter API */
	if (stream->filterhead) {
		php_stream_filter *filter;

		MAKE_STD_ZVAL(newval);
		array_init(newval);

		for (filter = stream->filterhead; filter != NULL; filter = filter->next) {
			add_next_index_string(newval, filter->fops->label);
		}

		add_assoc_zval(return_value, "filters", newval);
	}
#endif

	add_assoc_long(return_value, "unread_bytes", stream->writepos - stream->readpos);

	add_assoc_bool(return_value, "seekable", (stream->ops->seek) && (stream->flags & PHP_STREAM_FLAG_NO_SEEK) == 0);
	if (stream->orig_path) {
		add_assoc_string(return_value, "uri", stream->orig_path);
	}

}
/* }}} */

/* {{{ Retrieves list of registered socket transports */
PHP_FUNCTION(stream_get_transports)
{

	ZEND_PARSE_PARAMETERS_NONE();

	array_init(return_value);

	const HashTable *stream_xport_hash = php_stream_xport_get_hash();
	zend_string *stream_xport;
	ZEND_HASH_MAP_FOREACH_STR_KEY(stream_xport_hash, stream_xport) {
		add_next_index_str(return_value, zend_string_copy(stream_xport));
	} ZEND_HASH_FOREACH_END();
}
/* }}} */

/* {{{ Retrieves list of registered stream wrappers */
PHP_FUNCTION(stream_get_wrappers)
{
	ZEND_PARSE_PARAMETERS_NONE();

	array_init(return_value);

	const HashTable *url_stream_wrappers_hash = php_stream_get_url_stream_wrappers_hash();
	zend_string *stream_protocol;
	ZEND_HASH_MAP_FOREACH_STR_KEY(url_stream_wrappers_hash, stream_protocol) {
		if (stream_protocol) {
			add_next_index_str(return_value, zend_string_copy(stream_protocol));
		}
	} ZEND_HASH_FOREACH_END();

}
/* }}} */

PHP_FUNCTION(stream_last_errors)
{
	ZEND_PARSE_PARAMETERS_NONE();
	php_stream_error_get_last(return_value);
}

PHP_FUNCTION(stream_clear_errors)
{
	ZEND_PARSE_PARAMETERS_NONE();
	php_stream_error_clear_stored();
}

/* {{{ stream_select related functions */
static int stream_array_to_fd_set(const HashTable *stream_array, fd_set *fds, php_socket_t *max_fd)
{
	zval *elem;
	php_stream *stream;
	int cnt = 0;

	ZEND_HASH_FOREACH_VAL(stream_array, elem) {
		/* Temporary int fd is needed for the STREAM data type on windows, passing this_fd directly to php_stream_cast()
			would eventually bring a wrong result on x64. php_stream_cast() casts to int internally, and this will leave
			the higher bits of a SOCKET variable uninitialized on systems with little endian. */
		php_socket_t this_fd;

		ZVAL_DEREF(elem);
		php_stream_from_zval_no_verify(stream, elem);
		if (stream == NULL) {
			continue;
		}
		/* get the fd.
		 * NB: Most other code will NOT use the PHP_STREAM_CAST_INTERNAL flag
		 * when casting.  It is only used here so that the buffered data warning
		 * is not displayed.
		 * */
		if (SUCCESS == php_stream_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL, (void*)&this_fd, 1) && this_fd != -1) {

			PHP_SAFE_FD_SET(this_fd, fds);

			if (this_fd > *max_fd) {
				*max_fd = this_fd;
			}
			cnt++;
		}
	} ZEND_HASH_FOREACH_END();
	return cnt ? 1 : 0;
}

static int stream_array_from_fd_set(zval *stream_array, const fd_set *fds)
{
	zval *elem, *dest_elem;
	HashTable *ht;
	php_stream *stream;
	int ret = 0;
	zend_string *key;
	zend_ulong num_ind;

	ZEND_ASSERT(Z_TYPE_P(stream_array) == IS_ARRAY);
	ht = zend_new_array(zend_hash_num_elements(Z_ARRVAL_P(stream_array)));

	ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(stream_array), num_ind, key, elem) {
		php_socket_t this_fd;

		ZVAL_DEREF(elem);
		php_stream_from_zval_no_verify(stream, elem);
		if (stream == NULL) {
			continue;
		}
		/* get the fd
		 * NB: Most other code will NOT use the PHP_STREAM_CAST_INTERNAL flag
		 * when casting.  It is only used here so that the buffered data warning
		 * is not displayed.
		 */
		if (SUCCESS == php_stream_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL, (void*)&this_fd, 1) && this_fd != SOCK_ERR) {
			if (PHP_SAFE_FD_ISSET(this_fd, fds)) {
				if (!key) {
					dest_elem = zend_hash_index_update(ht, num_ind, elem);
				} else {
					dest_elem = zend_hash_update(ht, key, elem);
				}

				zval_add_ref(dest_elem);
				ret++;
			}
		}
	} ZEND_HASH_FOREACH_END();

	/* destroy old array and add new one */
	zval_ptr_dtor(stream_array);
	ZVAL_ARR(stream_array, ht);

	return ret;
}

static int stream_array_emulate_read_fd_set(zval *stream_array)
{
	zval *elem, *dest_elem;
	HashTable *ht;
	php_stream *stream;
	int ret = 0;
	zend_ulong num_ind;
	zend_string *key;

	ZEND_ASSERT(Z_TYPE_P(stream_array) == IS_ARRAY);
	ht = zend_new_array(zend_hash_num_elements(Z_ARRVAL_P(stream_array)));

	ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(stream_array), num_ind, key, elem) {
		ZVAL_DEREF(elem);
		php_stream_from_zval_no_verify(stream, elem);
		if (stream == NULL) {
			continue;
		}
		if ((stream->writepos - stream->readpos) > 0) {
			/* allow readable non-descriptor based streams to participate in stream_select.
			 * Non-descriptor streams will only "work" if they have previously buffered the
			 * data.  Not ideal, but better than nothing.
			 * This branch of code also allows blocking streams with buffered data to
			 * operate correctly in stream_select.
			 * */
			if (!key) {
				dest_elem = zend_hash_index_update(ht, num_ind, elem);
			} else {
				dest_elem = zend_hash_update(ht, key, elem);
			}
			zval_add_ref(dest_elem);
			ret++;
		}
	} ZEND_HASH_FOREACH_END();

	if (ret > 0) {
		/* destroy old array and add new one */
		zval_ptr_dtor(stream_array);
		ZVAL_ARR(stream_array, ht);
	} else {
		zend_array_destroy(ht);
	}

	return ret;
}
/* }}} */

/* {{{ Runs the select() system call on the sets of streams with a timeout specified by tv_sec and tv_usec */
PHP_FUNCTION(stream_select)
{
	zval *r_array, *w_array, *e_array, *zcontext = NULL;
	struct timeval tv, *tv_p = NULL;
	fd_set rfds, wfds, efds;
	php_socket_t max_fd = 0;
	int retval, sets = 0;
	zend_long sec, usec = 0;
	bool secnull;
	bool usecnull = 1;
	int set_count, max_set_count = 0;
	php_stream_context *context = NULL;

	ZEND_PARSE_PARAMETERS_START(4, 6)
		Z_PARAM_ARRAY_EX2(r_array, 1, 1, 0)
		Z_PARAM_ARRAY_EX2(w_array, 1, 1, 0)
		Z_PARAM_ARRAY_EX2(e_array, 1, 1, 0)
		Z_PARAM_LONG_OR_NULL(sec, secnull)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(usec, usecnull)
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	FD_ZERO(&rfds);
	FD_ZERO(&wfds);
	FD_ZERO(&efds);

	php_stream_error_operation_begin();
	context = php_stream_context_from_zval(zcontext, 0);

	if (r_array != NULL) {
		set_count = stream_array_to_fd_set(Z_ARR_P(r_array), &rfds, &max_fd);
		if (set_count > max_set_count)
			max_set_count = set_count;
		sets += set_count;
	}

	if (w_array != NULL) {
		set_count = stream_array_to_fd_set(Z_ARR_P(w_array), &wfds, &max_fd);
		if (set_count > max_set_count)
			max_set_count = set_count;
		sets += set_count;
	}

	if (e_array != NULL) {
		set_count = stream_array_to_fd_set(Z_ARR_P(e_array), &efds, &max_fd);
		if (set_count > max_set_count)
			max_set_count = set_count;
		sets += set_count;
	}

	if (!sets) {
		php_stream_error_operation_end(context);
		zend_value_error("No stream arrays were passed");
		RETURN_THROWS();
	}

	if (!PHP_SAFE_MAX_FD(max_fd, max_set_count)) {
		RETURN_FALSE;
	}

	if (secnull && !usecnull) {
		if (usec != 0) {
			php_stream_error_operation_end(context);
			zend_argument_value_error(5, "must be null when argument #4 ($seconds) is null");
			RETURN_THROWS();
		}
	}

	/* If seconds is not set to null, build the timeval, else we wait indefinitely */
	if (!secnull) {
		if (sec < 0) {
			php_stream_error_operation_end(context);
			zend_argument_value_error(4, "must be greater than or equal to 0");
			RETURN_THROWS();
		} else if (usec < 0) {
			php_stream_error_operation_end(context);
			zend_argument_value_error(5, "must be greater than or equal to 0");
			RETURN_THROWS();
		}

		/* Windows, Solaris and BSD do not like microsecond values which are >= 1 sec */
		tv.tv_sec = (long)(sec + (usec / 1000000));
		tv.tv_usec = (long)(usec % 1000000);
		tv_p = &tv;
	}

	/* slight hack to support buffered data; if there is data sitting in the
	 * read buffer of any of the streams in the read array, let's pretend
	 * that we selected, but return only the readable sockets */
	if (r_array != NULL) {
		retval = stream_array_emulate_read_fd_set(r_array);
		if (retval > 0) {
			php_stream_error_operation_end(context);
			if (w_array != NULL) {
				zval_ptr_dtor(w_array);
				ZVAL_EMPTY_ARRAY(w_array);
			}
			if (e_array != NULL) {
				zval_ptr_dtor(e_array);
				ZVAL_EMPTY_ARRAY(e_array);
			}
			RETURN_LONG(retval);
		}
	}

	retval = php_select(max_fd+1, &rfds, &wfds, &efds, tv_p);
	php_stream_error_operation_end(context);

	if (retval == -1) {
		php_error_docref(NULL, E_WARNING, "Unable to select [%d]: %s (max_fd=" PHP_SOCKET_FMT ")",
				errno, strerror(errno), max_fd);
		RETURN_FALSE;
	}

	if (r_array != NULL) stream_array_from_fd_set(r_array, &rfds);
	if (w_array != NULL) stream_array_from_fd_set(w_array, &wfds);
	if (e_array != NULL) stream_array_from_fd_set(e_array, &efds);

	RETURN_LONG(retval);
}
/* }}} */

/* {{{ stream_context related functions */
static void user_space_stream_notifier(php_stream_context *context, int notifycode, int severity,
		char *xmsg, int xcode, size_t bytes_sofar, size_t bytes_max, void * ptr)
{
	zval zvs[6];

	ZVAL_LONG(&zvs[0], notifycode);
	ZVAL_LONG(&zvs[1], severity);
	if (xmsg) {
		ZVAL_STRING(&zvs[2], xmsg);
	} else {
		ZVAL_NULL(&zvs[2]);
	}
	ZVAL_LONG(&zvs[3], xcode);
	ZVAL_LONG(&zvs[4], bytes_sofar);
	ZVAL_LONG(&zvs[5], bytes_max);

	zend_call_known_fcc(context->notifier->ptr, NULL, 6, zvs, NULL);
	/* Free refcounted string parameter */
	zval_ptr_dtor_str(&zvs[2]);
}

static void user_space_stream_notifier_dtor(php_stream_notifier *notifier)
{
	zend_fcall_info_cache *fcc = notifier->ptr;
	zend_fcc_dtor(fcc);
	efree(notifier->ptr);
	notifier->ptr = NULL;
}

static zend_result parse_context_options(php_stream_context *context, const HashTable *options)
{
	zval *wval, *oval;
	zend_string *wkey, *okey;

	ZEND_HASH_FOREACH_STR_KEY_VAL(options, wkey, wval) {
		ZVAL_DEREF(wval);
		if (wkey && Z_TYPE_P(wval) == IS_ARRAY) {
			if (!HT_IS_PACKED(Z_ARRVAL_P(wval))) {
				ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(wval), okey, oval) {
					if (okey) {
						php_stream_context_set_option(context, ZSTR_VAL(wkey), ZSTR_VAL(okey), oval);
					}
				} ZEND_HASH_FOREACH_END();
			}
		} else {
			zend_value_error("Options should have the form [\"wrappername\"][\"optionname\"] = $value");
			return FAILURE;
		}
	} ZEND_HASH_FOREACH_END();

	return SUCCESS;
}

static zend_result parse_context_params(php_stream_context *context, const HashTable *params)
{
	zval *tmp;

	if (NULL != (tmp = zend_hash_str_find(params, "notification", sizeof("notification")-1))) {

		if (context->notifier) {
			php_stream_notification_free(context->notifier);
			context->notifier = NULL;
		}

		zend_fcall_info_cache *fcc = emalloc(sizeof(*fcc));
		char *error;
		if (!zend_is_callable_ex(tmp, NULL, 0, NULL, fcc, &error)) {
			zend_argument_type_error(1, "must be an array with valid callbacks as values, %s", error);
			efree(fcc);
			efree(error);
			return FAILURE;
		}
		zend_fcc_addref(fcc);

		context->notifier = php_stream_notification_alloc();
		context->notifier->func = user_space_stream_notifier;
		context->notifier->ptr = fcc;
		context->notifier->dtor = user_space_stream_notifier_dtor;
	}
	if (NULL != (tmp = zend_hash_str_find(params, "options", sizeof("options")-1))) {
		if (Z_TYPE_P(tmp) == IS_ARRAY) {
			return parse_context_options(context, Z_ARRVAL_P(tmp));
		} else {
			zend_type_error("Invalid stream/context parameter");
			return FAILURE;
		}
	}

	return SUCCESS;
}

/* given a zval which is either a stream or a context, return the underlying
 * stream_context.  If it is a stream that does not have a context assigned, it
 * will create and assign a context and return that.  */
static php_stream_context *decode_context_param(zval *contextresource)
{
	php_stream_context *context = NULL;

	context = zend_fetch_resource_ex(contextresource, NULL, php_le_stream_context());
	if (context == NULL) {
		php_stream *stream;

		stream = zend_fetch_resource2_ex(contextresource, NULL, php_file_le_stream(), php_file_le_pstream());

		if (stream) {
			context = PHP_STREAM_CONTEXT(stream);
			if (context == NULL) {
				/* Only way this happens is if file is opened with NO_DEFAULT_CONTEXT
				   param, but then something is called which requires a context.
				   Don't give them the default one though since they already said they
	 			   didn't want it. */
				context = php_stream_context_alloc();
				stream->ctx = context->res;
			}
		}
	}

	return context;
}
/* }}} */

/* {{{ Retrieve options for a stream/wrapper/context */
PHP_FUNCTION(stream_context_get_options)
{
	zval *zcontext;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_RESOURCE(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	context = decode_context_param(zcontext);
	if (!context) {
		zend_argument_type_error(1, "must be a valid stream/context");
		RETURN_THROWS();
	}

	ZVAL_COPY(return_value, &context->options);
}
/* }}} */

/* {{{ Set an option for a wrapper */
PHP_FUNCTION(stream_context_set_option)
{
	zval *zcontext = NULL;
	php_stream_context *context;
	zend_string *wrappername;
	HashTable *options;
	char *optionname = NULL;
	size_t optionname_len;
	zval *zvalue = NULL;

	if (ZEND_NUM_ARGS() == 2) {
		zend_error(E_DEPRECATED, "Calling stream_context_set_option() with 2 arguments is deprecated, "
			"use stream_context_set_options() instead"
		);
		if (UNEXPECTED(EG(exception))) {
			RETURN_THROWS();
		}
	}

	ZEND_PARSE_PARAMETERS_START(2, 4)
		Z_PARAM_RESOURCE(zcontext)
		Z_PARAM_ARRAY_HT_OR_STR(options, wrappername)
		Z_PARAM_OPTIONAL
		Z_PARAM_STRING_OR_NULL(optionname, optionname_len)
		Z_PARAM_ZVAL(zvalue)
	ZEND_PARSE_PARAMETERS_END();

	/* figure out where the context is coming from exactly */
	if (!(context = decode_context_param(zcontext))) {
		zend_argument_type_error(1, "must be a valid stream/context");
		RETURN_THROWS();
	}

	if (options) {
		if (optionname) {
			zend_argument_value_error(3, "must be null when argument #2 ($wrapper_or_options) is an array");
			RETURN_THROWS();
		}

		if (zvalue) {
			zend_argument_value_error(4, "cannot be provided when argument #2 ($wrapper_or_options) is an array");
			RETURN_THROWS();
		}

		if (parse_context_options(context, options) == FAILURE) {
			RETURN_THROWS();
		}

		RETURN_TRUE;
	} else {
		if (!optionname) {
			zend_argument_value_error(3, "cannot be null when argument #2 ($wrapper_or_options) is a string");
			RETURN_THROWS();
		}
		if (!zvalue) {
			zend_argument_value_error(4, "must be provided when argument #2 ($wrapper_or_options) is a string");
			RETURN_THROWS();
		}
		php_stream_context_set_option(context, ZSTR_VAL(wrappername), optionname, zvalue);
		RETURN_TRUE;
	}
}
/* }}} */

PHP_FUNCTION(stream_context_set_options)
{
	zval *zcontext = NULL;
	php_stream_context *context;
	HashTable *options;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_RESOURCE(zcontext)
		Z_PARAM_ARRAY_HT(options)
	ZEND_PARSE_PARAMETERS_END();

	/* figure out where the context is coming from exactly */
	if (!(context = decode_context_param(zcontext))) {
		zend_argument_type_error(1, "must be a valid stream/context");
		RETURN_THROWS();
	}

	if (parse_context_options(context, options) == FAILURE) {
		RETURN_THROWS();
	}

	RETURN_TRUE;
}

/* {{{ Set parameters for a file context */
PHP_FUNCTION(stream_context_set_params)
{
	HashTable *params;
	zval *zcontext;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		Z_PARAM_RESOURCE(zcontext)
		Z_PARAM_ARRAY_HT(params)
	ZEND_PARSE_PARAMETERS_END();

	context = decode_context_param(zcontext);
	if (!context) {
		zend_argument_type_error(1, "must be a valid stream/context");
		RETURN_THROWS();
	}

	if (parse_context_params(context, params) == FAILURE) {
		RETURN_THROWS();
	}

	RETURN_TRUE;
}
/* }}} */

/* {{{ Get parameters of a file context */
PHP_FUNCTION(stream_context_get_params)
{
	zval *zcontext;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_RESOURCE(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	context = decode_context_param(zcontext);
	if (!context) {
		zend_argument_type_error(1, "must be a valid stream/context");
		RETURN_THROWS();
	}

	array_init(return_value);
	if (context->notifier && context->notifier->func == user_space_stream_notifier) {
		zend_fcall_info_cache *fcc = context->notifier->ptr;
		zval fn;
		zend_get_callable_zval_from_fcc(fcc, &fn);
		add_assoc_zval_ex(return_value, ZEND_STRL("notification"), &fn);
	}
	Z_TRY_ADDREF(context->options);
	add_assoc_zval_ex(return_value, "options", sizeof("options")-1, &context->options);
}
/* }}} */

/* {{{ Get a handle on the default file/stream context and optionally set parameters */
PHP_FUNCTION(stream_context_get_default)
{
	HashTable *params = NULL;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(0, 1)
		Z_PARAM_OPTIONAL
		Z_PARAM_ARRAY_HT_OR_NULL(params)
	ZEND_PARSE_PARAMETERS_END();

	if (FG(default_context) == NULL) {
		FG(default_context) = php_stream_context_alloc();
	}
	context = FG(default_context);

	if (params) {
		if (parse_context_options(context, params) == FAILURE) {
			RETURN_THROWS();
		}
	}

	php_stream_context_to_zval(context, return_value);
}
/* }}} */

/* Check if options contain stream error handling settings */
static bool php_stream_context_options_has_error_settings(const HashTable *options)
{
	zval *stream_options = zend_hash_str_find(options, ZEND_STRL("stream"));
	if (!stream_options) {
		return false;
	}

	ZVAL_DEREF(stream_options);
	if (Z_TYPE_P(stream_options) != IS_ARRAY) {
		return false;
	}

	return zend_hash_str_exists(Z_ARRVAL_P(stream_options), ZEND_STRL("error_mode"))
			|| zend_hash_str_exists(Z_ARRVAL_P(stream_options), ZEND_STRL("error_store"))
			|| zend_hash_str_exists(Z_ARRVAL_P(stream_options), ZEND_STRL("error_handler"));
}

/* {{{ Set default file/stream context, returns the context as a resource */
PHP_FUNCTION(stream_context_set_default)
{
	HashTable *options;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_ARRAY_HT(options)
	ZEND_PARSE_PARAMETERS_END();

	if (FG(default_context) == NULL) {
		FG(default_context) = php_stream_context_alloc();
	}
	context = FG(default_context);

	if (php_stream_context_options_has_error_settings(options)) {
		zend_value_error("Stream error handling options cannot be set on the default context");
		RETURN_THROWS();
	}

	if (parse_context_options(context, options) == FAILURE) {
		RETURN_THROWS();
	}

	php_stream_context_to_zval(context, return_value);
}
/* }}} */

/* {{{ Create a file context and optionally set parameters */
PHP_FUNCTION(stream_context_create)
{
	HashTable *options = NULL;
	HashTable *params = NULL;
	php_stream_context *context;

	ZEND_PARSE_PARAMETERS_START(0, 2)
		Z_PARAM_OPTIONAL
		Z_PARAM_ARRAY_HT_OR_NULL(options)
		Z_PARAM_ARRAY_HT_OR_NULL(params)
	ZEND_PARSE_PARAMETERS_END();

	context = php_stream_context_alloc();

	if (options) {
		if (parse_context_options(context, options) == FAILURE) {
			RETURN_THROWS();
		}
	}

	if (params) {
		if (parse_context_params(context, params) == FAILURE) {
			RETURN_THROWS();
		}
	}

	RETURN_RES(context->res);
}
/* }}} */

/* {{{ streams filter functions */
static void apply_filter_to_stream(bool append, INTERNAL_FUNCTION_PARAMETERS)
{
	php_stream *stream;
	char *filtername;
	size_t filternamelen;
	zend_long read_write = 0;
	zval *filterparams = NULL;
	php_stream_filter *filter = NULL;

	ZEND_PARSE_PARAMETERS_START(2, 4)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_STRING(filtername, filternamelen)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(read_write)
		Z_PARAM_ZVAL(filterparams)
	ZEND_PARSE_PARAMETERS_END();

	if ((read_write & PHP_STREAM_FILTER_ALL) == 0) {
		/* Chain not specified.
		 * Examine stream->mode to determine which filters are needed
		 * There's no harm in attaching a filter to an unused chain,
		 * but why waste the memory and clock cycles?
		 */
		if (strchr(stream->mode, 'r') || strchr(stream->mode, '+')) {
			read_write |= PHP_STREAM_FILTER_READ;
		}
		if (strchr(stream->mode, 'w') || strchr(stream->mode, '+') || strchr(stream->mode, 'a')) {
			read_write |= PHP_STREAM_FILTER_WRITE;
		}
	}

	if (read_write & PHP_STREAM_FILTER_READ) {
		filter = php_stream_filter_create(filtername, filterparams, php_stream_is_persistent(stream));
		if (filter == NULL) {
			RETURN_FALSE;
		}

		if (append) {
			zend_result ret = php_stream_filter_append_ex(&stream->readfilters, filter);
			if (ret != SUCCESS) {
				php_stream_filter_remove(filter, 1);
				RETURN_FALSE;
			}
		} else {
			php_stream_filter_prepend_ex(&stream->readfilters, filter);
		}
	}

	if (read_write & PHP_STREAM_FILTER_WRITE) {
		filter = php_stream_filter_create(filtername, filterparams, php_stream_is_persistent(stream));
		if (filter == NULL) {
			RETURN_FALSE;
		}

		if (append) {
			zend_result ret = php_stream_filter_append_ex(&stream->writefilters, filter);
			if (ret != SUCCESS) {
				php_stream_filter_remove(filter, 1);
				RETURN_FALSE;
			}
		} else {
			php_stream_filter_prepend_ex(&stream->writefilters, filter);
		}
	}

	if (filter) {
		filter->res = zend_register_resource(filter, php_file_le_stream_filter());
		GC_ADDREF(filter->res);
		RETURN_RES(filter->res);
	} else {
		RETURN_FALSE;
	}
}
/* }}} */

/* {{{ Prepend a filter to a stream */
PHP_FUNCTION(stream_filter_prepend)
{
	apply_filter_to_stream(0, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */

/* {{{ Append a filter to a stream */
PHP_FUNCTION(stream_filter_append)
{
	apply_filter_to_stream(1, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */

/* {{{ Flushes any data in the filter's internal buffer, removes it from the chain, and frees the resource */
PHP_FUNCTION(stream_filter_remove)
{
	zval *zfilter;
	php_stream_filter *filter;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_RESOURCE(zfilter)
	ZEND_PARSE_PARAMETERS_END();

	filter = zend_fetch_resource(Z_RES_P(zfilter), "stream filter", php_file_le_stream_filter());
	if (!filter) {
		RETURN_THROWS();
	}

	if (php_stream_filter_flush(filter, 1) == FAILURE) {
		php_error_docref(NULL, E_WARNING, "Unable to flush filter, not removing");
		RETURN_FALSE;
	}

	zend_list_close(Z_RES_P(zfilter));
	php_stream_filter_remove(filter, 1);
	RETURN_TRUE;
}
/* }}} */

/* {{{ Read up to maxlen bytes from a stream or until the ending string is found */
PHP_FUNCTION(stream_get_line)
{
	char *str = NULL;
	size_t str_len = 0;
	zend_long max_length;
	zend_string *buf;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(2, 3)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(max_length)
		Z_PARAM_OPTIONAL
		Z_PARAM_STRING(str, str_len)
	ZEND_PARSE_PARAMETERS_END();

	if (max_length < 0) {
		zend_argument_value_error(2, "must be greater than or equal to 0");
		RETURN_THROWS();
	}
	if (!max_length) {
		max_length = PHP_SOCK_CHUNK_SIZE;
	}

	php_stream_error_operation_begin();
	if ((buf = php_stream_get_record(stream, max_length, str, str_len))) {
		RETVAL_STR(buf);
	} else {
		RETVAL_FALSE;
	}
	php_stream_error_operation_end_for_stream(stream);
}

/* }}} */

/* {{{ Set blocking/non-blocking mode on a socket or stream */
PHP_FUNCTION(stream_set_blocking)
{
	bool block;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_BOOL(block)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();
	RETVAL_BOOL(-1 != php_stream_set_option(stream, PHP_STREAM_OPTION_BLOCKING, block, NULL));
	php_stream_error_operation_end_for_stream(stream);
}

/* }}} */

/* {{{ Set timeout on stream read to seconds + microseonds */
#if defined(HAVE_SYS_TIME_H) || defined(PHP_WIN32)
PHP_FUNCTION(stream_set_timeout)
{
	zend_long seconds, microseconds = 0;
	struct timeval t;
	php_stream *stream;
	int argc = ZEND_NUM_ARGS();

	ZEND_PARSE_PARAMETERS_START(2, 3)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(seconds)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG(microseconds)
	ZEND_PARSE_PARAMETERS_END();

#ifdef PHP_WIN32
	t.tv_sec = (long)seconds;

	if (argc == 3) {
		t.tv_usec = (long)(microseconds % 1000000);
		t.tv_sec +=(long)(microseconds / 1000000);
	} else {
		t.tv_usec = 0;
	}
#else
	t.tv_sec = seconds;

	if (argc == 3) {
		t.tv_usec = microseconds % 1000000;
		t.tv_sec += microseconds / 1000000;
	} else {
		t.tv_usec = 0;
	}
#endif

	php_stream_error_operation_begin();
	RETVAL_BOOL(PHP_STREAM_OPTION_RETURN_OK == php_stream_set_option(stream, PHP_STREAM_OPTION_READ_TIMEOUT, 0, &t));
	php_stream_error_operation_end_for_stream(stream);
}
#endif /* HAVE_SYS_TIME_H || defined(PHP_WIN32) */
/* }}} */

/* {{{ Set file write buffer */
PHP_FUNCTION(stream_set_write_buffer)
{
	int ret;
	zend_long arg2;
	size_t buff;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(arg2)
	ZEND_PARSE_PARAMETERS_END();

	buff = arg2;

	php_stream_error_operation_begin();
	/* if buff is 0 then set to non-buffered */
	if (buff == 0) {
		ret = php_stream_set_option(stream, PHP_STREAM_OPTION_WRITE_BUFFER, PHP_STREAM_BUFFER_NONE, NULL);
	} else {
		ret = php_stream_set_option(stream, PHP_STREAM_OPTION_WRITE_BUFFER, PHP_STREAM_BUFFER_FULL, &buff);
	}
	php_stream_error_operation_end_for_stream(stream);

	RETURN_LONG(ret == 0 ? 0 : EOF);
}
/* }}} */

/* {{{ Set the stream chunk size */
PHP_FUNCTION(stream_set_chunk_size)
{
	int			ret;
	zend_long		csize;
	php_stream	*stream;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(csize)
	ZEND_PARSE_PARAMETERS_END();

	if (csize <= 0) {
		zend_argument_value_error(2, "must be greater than 0");
		RETURN_THROWS();
	}
	/* stream.chunk_size is actually a size_t, but php_stream_set_option
	 * can only use an int to accept the new value and return the old one.
	 * In any case, values larger than INT_MAX for a chunk size make no sense.
	 */
	if (csize > INT_MAX) {
		zend_argument_value_error(2, "is too large");
		RETURN_THROWS();
	}

	php_stream_error_operation_begin();
	ret = php_stream_set_option(stream, PHP_STREAM_OPTION_SET_CHUNK_SIZE, (int)csize, NULL);
	php_stream_error_operation_end_for_stream(stream);

	RETURN_LONG(ret > 0 ? (zend_long)ret : (zend_long)EOF);
}
/* }}} */

/* {{{ Set file read buffer */
PHP_FUNCTION(stream_set_read_buffer)
{
	int ret;
	zend_long arg2;
	size_t buff;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(arg2)
	ZEND_PARSE_PARAMETERS_END();

	buff = arg2;

	php_stream_error_operation_begin();
	/* if buff is 0 then set to non-buffered */
	if (buff == 0) {
		ret = php_stream_set_option(stream, PHP_STREAM_OPTION_READ_BUFFER, PHP_STREAM_BUFFER_NONE, NULL);
	} else {
		ret = php_stream_set_option(stream, PHP_STREAM_OPTION_READ_BUFFER, PHP_STREAM_BUFFER_FULL, &buff);
	}
	php_stream_error_operation_end_for_stream(stream);

	RETURN_LONG(ret == 0 ? 0 : EOF);
}
/* }}} */

/* {{{ Enable or disable a specific kind of crypto on the stream */
PHP_FUNCTION(stream_socket_enable_crypto)
{
	zend_long cryptokind = 0;
	php_stream *stream, *sessstream = NULL;
	bool enable, cryptokindnull = 1;
	int ret;

	ZEND_PARSE_PARAMETERS_START(2, 4)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_BOOL(enable)
		Z_PARAM_OPTIONAL
		Z_PARAM_LONG_OR_NULL(cryptokind, cryptokindnull)
		PHP_Z_PARAM_STREAM_OR_NULL(sessstream)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();

	if (enable) {
		if (cryptokindnull) {
			zval *val;

			if (!GET_CTX_OPT(stream, "ssl", "crypto_method", val)) {
				php_stream_error_operation_end_for_stream(stream);
				zend_argument_value_error(3, "must be specified when enabling encryption");
				RETURN_THROWS();
			}

			cryptokind = Z_LVAL_P(val);
		}

		if (php_stream_xport_crypto_setup(stream, cryptokind, sessstream) < 0) {
			php_stream_error_operation_end_for_stream(stream);
			RETURN_FALSE;
		}
	}

	ret = php_stream_xport_crypto_enable(stream, enable);
	php_stream_error_operation_end_for_stream(stream);
	switch (ret) {
		case -1:
			RETURN_FALSE;

		case 0:
			RETURN_LONG(0);

		default:
			RETURN_TRUE;
	}
}
/* }}} */

/* Get crypto status */
PHP_FUNCTION(stream_socket_get_crypto_status)
{
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		PHP_Z_PARAM_STREAM(stream)
	ZEND_PARSE_PARAMETERS_END();

	RETURN_LONG(php_stream_xport_crypto_get_status(stream));
}

/* {{{ Determine what file will be opened by calls to fopen() with a relative path */
PHP_FUNCTION(stream_resolve_include_path)
{
	zend_string *filename;
	zend_string *resolved_path;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		Z_PARAM_PATH_STR(filename)
	ZEND_PARSE_PARAMETERS_END();

	resolved_path = zend_resolve_path(filename);

	if (resolved_path) {
		RETURN_STR(resolved_path);
	}
	RETURN_FALSE;
}
/* }}} */

/* {{{ */
PHP_FUNCTION(stream_is_local)
{
	zval *zstream, *zcontext = NULL;
	php_stream *stream = NULL;
	php_stream_wrapper *wrapper = NULL;
	php_stream_context *context = NULL;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		Z_PARAM_ZVAL(zstream)
		Z_PARAM_OPTIONAL
		Z_PARAM_RESOURCE_OR_NULL(zcontext)
	ZEND_PARSE_PARAMETERS_END();

	if (Z_TYPE_P(zstream) == IS_RESOURCE) {
		php_stream_from_zval(stream, zstream);
		wrapper = stream->wrapper;
	} else {
		if (!try_convert_to_string(zstream)) {
			RETURN_THROWS();
		}

		php_stream_error_operation_begin();
		context = php_stream_context_from_zval(zcontext, 0);
		wrapper = php_stream_locate_url_wrapper(Z_STRVAL_P(zstream), NULL, 0);
		php_stream_error_operation_end(context);
	}

	RETURN_BOOL(wrapper && wrapper->is_url == 0);
}
/* }}} */

/* {{{ Tells whether the stream supports locking through flock(). */
PHP_FUNCTION(stream_supports_lock)
{
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		PHP_Z_PARAM_STREAM(stream)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();
	RETVAL_BOOL(php_stream_supports_lock(stream));
	php_stream_error_operation_end_for_stream(stream);
}

/* {{{ Check if a stream is a TTY. */
PHP_FUNCTION(stream_isatty)
{
	php_stream *stream;
	php_socket_t fileno;

	ZEND_PARSE_PARAMETERS_START(1, 1)
		PHP_Z_PARAM_STREAM(stream)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();

	/* get the fd.
	 * NB: Most other code will NOT use the PHP_STREAM_CAST_INTERNAL flag when casting.
	 * It is only used here so that the buffered data warning is not displayed.
	 */
	if (php_stream_can_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL) == SUCCESS) {
		php_stream_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL, (void*)&fileno, 0);
	} else if (php_stream_can_cast(stream, PHP_STREAM_AS_FD | PHP_STREAM_CAST_INTERNAL) == SUCCESS) {
		php_stream_cast(stream, PHP_STREAM_AS_FD | PHP_STREAM_CAST_INTERNAL, (void*)&fileno, 0);
	} else {
		php_stream_error_operation_end_for_stream(stream);
		RETURN_FALSE;
	}
	php_stream_error_operation_end_for_stream(stream);

#ifdef PHP_WIN32
	/* Check if the Windows standard handle is redirected to file */
	RETURN_BOOL(php_win32_console_fileno_is_console(fileno));
#elif defined(HAVE_UNISTD_H)
	/* Check if the file descriptor identifier is a terminal */
	RETURN_BOOL(isatty(fileno));
#else
	zend_stat_t stat = {0};
	RETURN_BOOL(zend_fstat(fileno, &stat) == 0 && (stat.st_mode & /*S_IFMT*/0170000) == /*S_IFCHR*/0020000);
#endif
}

#ifdef PHP_WIN32
/* {{{ Get or set VT100 support for the specified stream associated to an
   output buffer of a Windows console.
*/
PHP_FUNCTION(sapi_windows_vt100_support)
{
	php_stream *stream;
	bool enable, enable_is_null = 1;
	zend_long fileno;

	ZEND_PARSE_PARAMETERS_START(1, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_OPTIONAL
		Z_PARAM_BOOL_OR_NULL(enable, enable_is_null)
	ZEND_PARSE_PARAMETERS_END();

	php_stream_error_operation_begin();

	/* get the fd.
	 * NB: Most other code will NOT use the PHP_STREAM_CAST_INTERNAL flag when casting.
	 * It is only used here so that the buffered data warning is not displayed.
	 */
	if (php_stream_can_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL) == SUCCESS) {
		php_stream_cast(stream, PHP_STREAM_AS_FD_FOR_SELECT | PHP_STREAM_CAST_INTERNAL, (void*)&fileno, 0);
	} else if (php_stream_can_cast(stream, PHP_STREAM_AS_FD | PHP_STREAM_CAST_INTERNAL) == SUCCESS) {
		php_stream_cast(stream, PHP_STREAM_AS_FD | PHP_STREAM_CAST_INTERNAL, (void*)&fileno, 0);
	} else {
		php_stream_error_operation_end_for_stream(stream);
		if (!enable_is_null) {
			php_error_docref(
				NULL,
				E_WARNING,
				"not able to analyze the specified stream"
			);
		}
		RETURN_FALSE;
	}
	php_stream_error_operation_end_for_stream(stream);

	/* Check if the file descriptor is a console */
	if (!php_win32_console_fileno_is_console(fileno)) {
		RETURN_FALSE;
	}

	if (enable_is_null) {
		/* Check if the Windows standard handle has VT100 control codes enabled */
		RETURN_BOOL(php_win32_console_fileno_has_vt100(fileno));
	} else {
		/* Enable/disable VT100 control codes support for the specified Windows standard handle */
		RETURN_BOOL(php_win32_console_fileno_set_vt100(fileno, enable ? TRUE : FALSE));
	}
}
#endif

#ifdef HAVE_SHUTDOWN
/* {{{ causes all or part of a full-duplex connection on the socket associated
	with stream to be shut down.  If how is SHUT_RD,  further receptions will
	be disallowed. If how is SHUT_WR, further transmissions will be disallowed.
	If how is SHUT_RDWR,  further  receptions and transmissions will be
	disallowed. */
PHP_FUNCTION(stream_socket_shutdown)
{
	zend_long how;
	php_stream *stream;

	ZEND_PARSE_PARAMETERS_START(2, 2)
		PHP_Z_PARAM_STREAM(stream)
		Z_PARAM_LONG(how)
	ZEND_PARSE_PARAMETERS_END();

	if (how != STREAM_SHUT_RD &&
	    how != STREAM_SHUT_WR &&
	    how != STREAM_SHUT_RDWR) {
	    zend_argument_value_error(2, "must be one of STREAM_SHUT_RD, STREAM_SHUT_WR, or STREAM_SHUT_RDWR");
		RETURN_THROWS();
	}

	php_stream_error_operation_begin();
	RETVAL_BOOL(php_stream_xport_shutdown(stream, (stream_shutdown_t)how) == 0);
	php_stream_error_operation_end_for_stream(stream);
}
/* }}} */
#endif
