memory.c

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/*
   +----------------------------------------------------------------------+
   | Copyright (c) The PHP Group                                          |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | https://www.php.net/license/3_01.txt                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Marcus Boerger <helly@php.net>                               |
   +----------------------------------------------------------------------+
 */
 
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include "php.h"
#include "ext/standard/base64.h"
 
PHPAPI size_t php_url_decode(char *str, size_t len);
 
/* Memory streams use a dynamic memory buffer to emulate a stream.
 * You can use php_stream_memory_open to create a readonly stream
 * from an existing memory buffer.
 */
 
/* Temp streams are streams that uses memory streams as long their
 * size is less than a given memory amount. When a write operation
 * exceeds that limit the content is written to a temporary file.
 */
 
/* {{{ ------- MEMORY stream implementation -------*/
 
typedef struct {
    zend_string *data;
    size_t      fpos;
    int         mode;
} php_stream_memory_data;
 
 
/* {{{ */
static ssize_t php_stream_memory_write(php_stream *stream, const char *buf, size_t count)
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    assert(ms != NULL);
 
    if (ms->mode & TEMP_STREAM_READONLY) {
        return (ssize_t) -1;
    }
    size_t data_len = ZSTR_LEN(ms->data);
    if (ms->mode & TEMP_STREAM_APPEND) {
        ms->fpos = data_len;
    }
    if (ms->fpos + count > data_len) {
        ms->data = zend_string_realloc(ms->data, ms->fpos + count, 0);
        if (ms->fpos > data_len) {
            /* zero the bytes added due to seek past end position */
            memset(ZSTR_VAL(ms->data) + data_len, 0, ms->fpos - data_len);
        }
    } else {
        ms->data = zend_string_separate(ms->data, 0);
    }
    if (count) {
        ZEND_ASSERT(buf != NULL);
        memcpy(ZSTR_VAL(ms->data) + ms->fpos, (char*) buf, count);
        ZSTR_VAL(ms->data)[ZSTR_LEN(ms->data)] = '\0';
        ms->fpos += count;
    }
    return count;
}
/* }}} */
 
 
/* {{{ */
static ssize_t php_stream_memory_read(php_stream *stream, char *buf, size_t count)
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    assert(ms != NULL);
 
    if (ms->fpos >= ZSTR_LEN(ms->data)) {
        stream->eof = 1;
        count = 0;
    } else {
        if (ms->fpos + count > ZSTR_LEN(ms->data)) {
            count = ZSTR_LEN(ms->data) - ms->fpos;
        }
        if (count) {
            ZEND_ASSERT(buf != NULL);
            memcpy(buf, ZSTR_VAL(ms->data) + ms->fpos, count);
            ms->fpos += count;
        }
    }
    return count;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_memory_close(php_stream *stream, int close_handle)
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    ZEND_ASSERT(ms != NULL);
    zend_string_release(ms->data);
    efree(ms);
    return 0;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_memory_flush(php_stream *stream)
{
    /* nothing to do here */
    return 0;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_memory_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs)
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    assert(ms != NULL);
 
    switch(whence) {
        case SEEK_CUR:
            if (offset < 0) {
                if (ms->fpos < (size_t)(-offset)) {
                    ms->fpos = 0;
                    *newoffs = -1;
                    return -1;
                } else {
                    ms->fpos = ms->fpos + offset;
                    *newoffs = ms->fpos;
                    stream->eof = 0;
                    return 0;
                }
            } else {
                stream->eof = 0;
                ms->fpos = ms->fpos + offset;
                *newoffs = ms->fpos;
                return 0;
            }
        case SEEK_SET:
            if (offset < 0) {
                ms->fpos = 0;
                *newoffs = -1;
                return -1;
            } else {
                ms->fpos = offset;
                *newoffs = ms->fpos;
                stream->eof = 0;
                return 0;
            }
        case SEEK_END:
            if (offset > 0) {
                ms->fpos = ZSTR_LEN(ms->data) + offset;
                *newoffs = ms->fpos;
                stream->eof = 0;
                return 0;
            } else if (ZSTR_LEN(ms->data) < (size_t)(-offset)) {
                ms->fpos = 0;
                *newoffs = -1;
                return -1;
            } else {
                ms->fpos = ZSTR_LEN(ms->data) + offset;
                *newoffs = ms->fpos;
                stream->eof = 0;
                return 0;
            }
        default:
            *newoffs = ms->fpos;
            return -1;
    }
}
/* }}} */
 
/* {{{ */
static int php_stream_memory_cast(php_stream *stream, int castas, void **ret)
{
    return FAILURE;
}
/* }}} */
 
static int php_stream_memory_stat(php_stream *stream, php_stream_statbuf *ssb) /* {{{ */
{
    time_t timestamp = 0;
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    assert(ms != NULL);
 
    memset(ssb, 0, sizeof(php_stream_statbuf));
    /* read-only across the board */
 
    ssb->sb.st_mode = ms->mode & TEMP_STREAM_READONLY ? 0444 : 0666;
 
    ssb->sb.st_size = ZSTR_LEN(ms->data);
    ssb->sb.st_mode |= S_IFREG; /* regular file */
    ssb->sb.st_mtime = timestamp;
    ssb->sb.st_atime = timestamp;
    ssb->sb.st_ctime = timestamp;
    ssb->sb.st_nlink = 1;
    ssb->sb.st_rdev = -1;
    /* this is only for APC, so use /dev/null device - no chance of conflict there! */
    ssb->sb.st_dev = 0xC;
    /* generate unique inode number for alias/filename, so no phars will conflict */
    ssb->sb.st_ino = 0;
 
#ifndef PHP_WIN32
    ssb->sb.st_blksize = -1;
    ssb->sb.st_blocks = -1;
#endif
 
    return 0;
}
/* }}} */
 
static int php_stream_memory_set_option(php_stream *stream, int option, int value, void *ptrparam) /* {{{ */
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    size_t newsize;
 
    switch(option) {
        case PHP_STREAM_OPTION_TRUNCATE_API:
            switch (value) {
                case PHP_STREAM_TRUNCATE_SUPPORTED:
                    return PHP_STREAM_OPTION_RETURN_OK;
 
                case PHP_STREAM_TRUNCATE_SET_SIZE:
                    if (ms->mode & TEMP_STREAM_READONLY) {
                        return PHP_STREAM_OPTION_RETURN_ERR;
                    }
                    newsize = *(size_t*)ptrparam;
                    if (newsize <= ZSTR_LEN(ms->data)) {
                        ms->data = zend_string_truncate(ms->data, newsize, 0);
                        if (newsize < ms->fpos) {
                            ms->fpos = newsize;
                        }
                    } else {
                        size_t old_size = ZSTR_LEN(ms->data);
                        ms->data = zend_string_realloc(ms->data, newsize, 0);
                        memset(ZSTR_VAL(ms->data) + old_size, 0, newsize - old_size);
                        ZSTR_VAL(ms->data)[ZSTR_LEN(ms->data)] = '\0';
                    }
                    return PHP_STREAM_OPTION_RETURN_OK;
            }
    }
 
    return PHP_STREAM_OPTION_RETURN_NOTIMPL;
}
/* }}} */
 
PHPAPI const php_stream_ops php_stream_memory_ops = {
    php_stream_memory_write, php_stream_memory_read,
    php_stream_memory_close, php_stream_memory_flush,
    "MEMORY",
    php_stream_memory_seek,
    php_stream_memory_cast,
    php_stream_memory_stat,
    php_stream_memory_set_option
};
 
/* {{{ */
PHPAPI int php_stream_mode_from_str(const char *mode)
{
    if (strpbrk(mode, "a")) {
        return TEMP_STREAM_APPEND;
    } else if (strpbrk(mode, "w+")) {
        return TEMP_STREAM_DEFAULT;
    }
    return TEMP_STREAM_READONLY;
}
/* }}} */
 
/* {{{ */
PHPAPI const char *_php_stream_mode_to_str(int mode)
{
    if (mode == TEMP_STREAM_READONLY) {
        return "rb";
    } else if (mode == TEMP_STREAM_APPEND) {
        return "a+b";
    }
    return "w+b";
}
/* }}} */
 
/* {{{ */
PHPAPI php_stream *_php_stream_memory_create(int mode STREAMS_DC)
{
    php_stream_memory_data *self;
    php_stream *stream;
 
    self = emalloc(sizeof(*self));
    self->data = ZSTR_EMPTY_ALLOC();
    self->fpos = 0;
    self->mode = mode;
 
    stream = php_stream_alloc_rel(&php_stream_memory_ops, self, 0, _php_stream_mode_to_str(mode));
    stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
    return stream;
}
/* }}} */
 
 
/* {{{ */
PHPAPI php_stream *_php_stream_memory_open(int mode, zend_string *buf STREAMS_DC)
{
    php_stream *stream;
    php_stream_memory_data *ms;
 
    if ((stream = php_stream_memory_create_rel(mode)) != NULL) {
        ms = (php_stream_memory_data*)stream->abstract;
        ms->data = zend_string_copy(buf);
    }
    return stream;
}
/* }}} */
 
 
/* {{{ */
PHPAPI zend_string *_php_stream_memory_get_buffer(php_stream *stream STREAMS_DC)
{
    php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
    ZEND_ASSERT(ms != NULL);
    return ms->data;
}
/* }}} */
 
/* }}} */
 
/* {{{ ------- TEMP stream implementation -------*/
 
typedef struct {
    php_stream  *innerstream;
    size_t      smax;
    int         mode;
    zval        meta;
    char*       tmpdir;
} php_stream_temp_data;
 
 
/* {{{ */
static ssize_t php_stream_temp_write(php_stream *stream, const char *buf, size_t count)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    assert(ts != NULL);
 
    if (!ts->innerstream) {
        return -1;
    }
    if (php_stream_is(ts->innerstream, PHP_STREAM_IS_MEMORY)) {
        zend_off_t pos = php_stream_tell(ts->innerstream);
 
        if (pos + count >= ts->smax) {
            zend_string *membuf = php_stream_memory_get_buffer(ts->innerstream);
            php_stream *file = php_stream_fopen_temporary_file(ts->tmpdir, "php", NULL);
            if (file == NULL) {
                php_error_docref(NULL, E_WARNING, "Unable to create temporary file, Check permissions in temporary files directory.");
                return 0;
            }
            php_stream_write(file, ZSTR_VAL(membuf), ZSTR_LEN(membuf));
            php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE);
            ts->innerstream = file;
            php_stream_encloses(stream, ts->innerstream);
            php_stream_seek(ts->innerstream, pos, SEEK_SET);
        }
    }
    return php_stream_write(ts->innerstream, buf, count);
}
/* }}} */
 
 
/* {{{ */
static ssize_t php_stream_temp_read(php_stream *stream, char *buf, size_t count)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    size_t got;
 
    assert(ts != NULL);
 
    if (!ts->innerstream) {
        return -1;
    }
 
    got = php_stream_read(ts->innerstream, buf, count);
 
    stream->eof = ts->innerstream->eof;
 
    return got;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_temp_close(php_stream *stream, int close_handle)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    int ret;
 
    assert(ts != NULL);
 
    if (ts->innerstream) {
        ret = php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE | (close_handle ? 0 : PHP_STREAM_FREE_PRESERVE_HANDLE));
    } else {
        ret = 0;
    }
 
    zval_ptr_dtor(&ts->meta);
 
    if (ts->tmpdir) {
        efree(ts->tmpdir);
    }
 
    efree(ts);
 
    return ret;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_temp_flush(php_stream *stream)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    assert(ts != NULL);
 
    return ts->innerstream ? php_stream_flush(ts->innerstream) : -1;
}
/* }}} */
 
 
/* {{{ */
static int php_stream_temp_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    int ret;
 
    assert(ts != NULL);
 
    if (!ts->innerstream) {
        *newoffs = -1;
        return -1;
    }
    ret = php_stream_seek(ts->innerstream, offset, whence);
    *newoffs = php_stream_tell(ts->innerstream);
    stream->eof = ts->innerstream->eof;
 
    return ret;
}
/* }}} */
 
/* {{{ */
static int php_stream_temp_cast(php_stream *stream, int castas, void **ret)
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
    php_stream *file;
    zend_string *membuf;
    zend_off_t pos;
 
    assert(ts != NULL);
 
    if (!ts->innerstream) {
        return FAILURE;
    }
    if (php_stream_is(ts->innerstream, PHP_STREAM_IS_STDIO)) {
        return php_stream_cast(ts->innerstream, castas, ret, 0);
    }
 
    /* we are still using a memory based backing. If they are if we can be
     * a FILE*, say yes because we can perform the conversion.
     * If they actually want to perform the conversion, we need to switch
     * the memory stream to a tmpfile stream */
 
    if (ret == NULL && castas == PHP_STREAM_AS_STDIO) {
        return SUCCESS;
    }
 
    /* say "no" to other stream forms */
    if (ret == NULL) {
        return FAILURE;
    }
 
    file = php_stream_fopen_tmpfile();
    if (file == NULL) {
        php_error_docref(NULL, E_WARNING, "Unable to create temporary file.");
        return FAILURE;
    }
 
    /* perform the conversion and then pass the request on to the innerstream */
    membuf = php_stream_memory_get_buffer(ts->innerstream);
    php_stream_write(file, ZSTR_VAL(membuf), ZSTR_LEN(membuf));
    pos = php_stream_tell(ts->innerstream);
 
    php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE);
    ts->innerstream = file;
    php_stream_encloses(stream, ts->innerstream);
    php_stream_seek(ts->innerstream, pos, SEEK_SET);
 
    return php_stream_cast(ts->innerstream, castas, ret, 1);
}
/* }}} */
 
static int php_stream_temp_stat(php_stream *stream, php_stream_statbuf *ssb) /* {{{ */
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
 
    if (!ts || !ts->innerstream) {
        return -1;
    }
    return php_stream_stat(ts->innerstream, ssb);
}
/* }}} */
 
static int php_stream_temp_set_option(php_stream *stream, int option, int value, void *ptrparam) /* {{{ */
{
    php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
 
    switch(option) {
        case PHP_STREAM_OPTION_META_DATA_API:
            if (Z_TYPE(ts->meta) != IS_UNDEF) {
                zend_hash_copy(Z_ARRVAL_P((zval*)ptrparam), Z_ARRVAL(ts->meta), zval_add_ref);
            }
            return PHP_STREAM_OPTION_RETURN_OK;
        default:
            if (ts->innerstream) {
                return php_stream_set_option(ts->innerstream, option, value, ptrparam);
            }
            return PHP_STREAM_OPTION_RETURN_NOTIMPL;
    }
}
/* }}} */
 
PHPAPI const php_stream_ops php_stream_temp_ops = {
    php_stream_temp_write, php_stream_temp_read,
    php_stream_temp_close, php_stream_temp_flush,
    "TEMP",
    php_stream_temp_seek,
    php_stream_temp_cast,
    php_stream_temp_stat,
    php_stream_temp_set_option
};
 
/* }}} */
 
/* {{{ _php_stream_temp_create_ex */
PHPAPI php_stream *_php_stream_temp_create_ex(int mode, size_t max_memory_usage, const char *tmpdir STREAMS_DC)
{
    php_stream_temp_data *self;
    php_stream *stream;
 
    self = ecalloc(1, sizeof(*self));
    self->smax = max_memory_usage;
    self->mode = mode;
    ZVAL_UNDEF(&self->meta);
    if (tmpdir) {
        self->tmpdir = estrdup(tmpdir);
    }
    stream = php_stream_alloc_rel(&php_stream_temp_ops, self, 0, _php_stream_mode_to_str(mode));
    stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
    self->innerstream = php_stream_memory_create_rel(mode);
    php_stream_encloses(stream, self->innerstream);
 
    return stream;
}
/* }}} */
 
/* {{{ _php_stream_temp_create */
PHPAPI php_stream *_php_stream_temp_create(int mode, size_t max_memory_usage STREAMS_DC)
{
    return php_stream_temp_create_ex(mode, max_memory_usage, NULL);
}
/* }}} */
 
/* {{{ _php_stream_temp_open */
PHPAPI php_stream *_php_stream_temp_open(int mode, size_t max_memory_usage, const char *buf, size_t length STREAMS_DC)
{
    php_stream *stream;
    php_stream_temp_data *ts;
    zend_off_t newoffs;
 
    if ((stream = php_stream_temp_create_rel(mode, max_memory_usage)) != NULL) {
        if (length) {
            assert(buf != NULL);
            php_stream_temp_write(stream, buf, length);
            php_stream_temp_seek(stream, 0, SEEK_SET, &newoffs);
        }
        ts = (php_stream_temp_data*)stream->abstract;
        assert(ts != NULL);
        ts->mode = mode;
    }
    return stream;
}
/* }}} */
 
PHPAPI const php_stream_ops php_stream_rfc2397_ops = {
    NULL, php_stream_temp_read,
    php_stream_temp_close, php_stream_temp_flush,
    "RFC2397",
    php_stream_temp_seek,
    php_stream_temp_cast,
    php_stream_temp_stat,
    php_stream_temp_set_option
};
 
static php_stream * php_stream_url_wrap_rfc2397(php_stream_wrapper *wrapper, const char *path,
                                                const char *mode, int options, zend_string **opened_path,
                                                php_stream_context *context STREAMS_DC) /* {{{ */
{
    php_stream *stream;
    php_stream_temp_data *ts;
    char *comma, *semi, *sep;
    size_t mlen, dlen, plen, vlen, ilen;
    zend_off_t newoffs;
    zval meta;
    int base64 = 0;
    zend_string *base64_comma = NULL;
 
    ZEND_ASSERT(mode);
 
    ZVAL_NULL(&meta);
    if (memcmp(path, "data:", 5)) {
        return NULL;
    }
 
    path += 5;
    dlen = strlen(path);
 
    if (dlen >= 2 && path[0] == '/' && path[1] == '/') {
        dlen -= 2;
        path += 2;
    }
 
    if ((comma = memchr(path, ',', dlen)) == NULL) {
        php_stream_wrapper_log_error(wrapper, options, "rfc2397: no comma in URL");
        return NULL;
    }
 
    if (comma != path) {
        /* meta info */
        mlen = comma - path;
        dlen -= mlen;
        semi = memchr(path, ';', mlen);
        sep = memchr(path, '/', mlen);
 
        if (!semi && !sep) {
            php_stream_wrapper_log_error(wrapper, options, "rfc2397: illegal media type");
            return NULL;
        }
 
        array_init(&meta);
        if (!semi) { /* there is only a mime type */
            add_assoc_stringl(&meta, "mediatype", (char *) path, mlen);
            mlen = 0;
        } else if (sep && sep < semi) { /* there is a mime type */
            plen = semi - path;
            add_assoc_stringl(&meta, "mediatype", (char *) path, plen);
            mlen -= plen;
            path += plen;
        } else if (semi != path || mlen != sizeof(";base64")-1 || memcmp(path, ";base64", sizeof(";base64")-1)) { /* must be error since parameters are only allowed after mediatype */
            zval_ptr_dtor(&meta);
            php_stream_wrapper_log_error(wrapper, options, "rfc2397: illegal media type");
            return NULL;
        }
        /* get parameters and potentially ';base64' */
        while(semi && (semi == path)) {
            path++;
            mlen--;
            sep = memchr(path, '=', mlen);
            semi = memchr(path, ';', mlen);
            if (!sep || (semi && semi < sep)) { /* must be ';base64' or failure */
                if (mlen != sizeof("base64")-1 || memcmp(path, "base64", sizeof("base64")-1)) {
                    /* must be error since parameters are only allowed after mediatype and we have no '=' sign */
                    zval_ptr_dtor(&meta);
                    php_stream_wrapper_log_error(wrapper, options, "rfc2397: illegal parameter");
                    return NULL;
                }
                base64 = 1;
                mlen -= sizeof("base64") - 1;
                path += sizeof("base64") - 1;
                break;
            }
            /* found parameter ... the heart of cs ppl lies in +1/-1 or was it +2 this time? */
            plen = sep - path;
            vlen = (semi ? (size_t)(semi - sep) : (mlen - plen)) - 1 /* '=' */;
            if (plen != sizeof("mediatype")-1 || memcmp(path, "mediatype", sizeof("mediatype")-1)) {
                add_assoc_stringl_ex(&meta, path, plen, sep + 1, vlen);
            }
            plen += vlen + 1;
            mlen -= plen;
            path += plen;
        }
        if (mlen) {
            zval_ptr_dtor(&meta);
            php_stream_wrapper_log_error(wrapper, options, "rfc2397: illegal URL");
            return NULL;
        }
    } else {
        array_init(&meta);
    }
    add_assoc_bool(&meta, "base64", base64);
 
    /* skip ',' */
    comma++;
    dlen--;
 
    if (base64) {
        base64_comma = php_base64_decode_ex((const unsigned char *)comma, dlen, 1);
        if (!base64_comma) {
            zval_ptr_dtor(&meta);
            php_stream_wrapper_log_error(wrapper, options, "rfc2397: unable to decode");
            return NULL;
        }
        comma = ZSTR_VAL(base64_comma);
        ilen = ZSTR_LEN(base64_comma);
    } else {
        comma = estrndup(comma, dlen);
        dlen = php_url_decode(comma, dlen);
        ilen = dlen;
    }
 
    if ((stream = php_stream_temp_create_rel(0, ~0u)) != NULL) {
        /* store data */
        php_stream_temp_write(stream, comma, ilen);
        php_stream_temp_seek(stream, 0, SEEK_SET, &newoffs);
        /* set special stream stuff (enforce exact mode) */
        vlen = strlen(mode);
        if (vlen >= sizeof(stream->mode)) {
            vlen = sizeof(stream->mode) - 1;
        }
        memcpy(stream->mode, mode, vlen);
        stream->mode[vlen] = '\0';
        stream->ops = &php_stream_rfc2397_ops;
        ts = (php_stream_temp_data*)stream->abstract;
        assert(ts != NULL);
        ts->mode = mode[0] == 'r' && mode[1] != '+' ? TEMP_STREAM_READONLY : 0;
        ZVAL_COPY_VALUE(&ts->meta, &meta);
    }
    if (base64_comma) {
        zend_string_free(base64_comma);
    } else {
        efree(comma);
    }
 
    return stream;
}
 
PHPAPI const php_stream_wrapper_ops php_stream_rfc2397_wops = {
    php_stream_url_wrap_rfc2397,
    NULL, /* close */
    NULL, /* fstat */
    NULL, /* stat */
    NULL, /* opendir */
    "RFC2397",
    NULL, /* unlink */
    NULL, /* rename */
    NULL, /* mkdir */
    NULL, /* rmdir */
    NULL, /* stream_metadata */
};
 
PHPAPI const php_stream_wrapper php_stream_rfc2397_wrapper =  {
    &php_stream_rfc2397_wops,
    NULL,
    1, /* is_url */
};