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|
/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.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. |
+----------------------------------------------------------------------+
| Authors: |
| Wez Furlong (wez@thebrainroom.com) |
+----------------------------------------------------------------------+
*/
#ifndef PHP_STREAMS_H
#define PHP_STREAMS_H
#if HAVE_PHP_STREAM
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
typedef struct _php_stream php_stream;
typedef struct _php_stream_ops {
/* stdio like functions - these are mandatory! */
size_t (*write)(php_stream * stream, const char * buf, size_t count);
size_t (*read)(php_stream * stream, char * buf, size_t count);
int (*close)(php_stream * stream);
int (*flush)(php_stream * stream);
/* these are optional */
int (*seek)(php_stream * stream, off_t offset, int whence);
/* used only in unbuffered mode */
char * (*gets)(php_stream * stream, char * buf, size_t size);
int (*cast)(php_stream * stream, int castas, void ** ret);
const char * label; /* label for this ops structure */
} php_stream_ops;
typedef struct _php_stream_buffer {
char * buffer;
size_t buflen;
int dirty; /* 1 if we need to commit data */
off_t readpos;
off_t writepos;
size_t chunksize; /* amount to commit in one operation */
int persistent;
} php_stream_buffer;
PHPAPI int php_stream_buf_init(php_stream_buffer * buffer, int persistent, size_t chunksize);
PHPAPI int php_stream_buf_cleanup(php_stream_buffer * buffer);
/* add data into buffer, growing it if required */
PHPAPI int php_stream_buf_append(php_stream_buffer * buffer, const char * buf, size_t size);
/* read data out of buffer */
PHPAPI size_t php_stream_buf_read(php_stream_buffer * buffer, char * buf, size_t size);
PHPAPI int php_stream_buf_overwrite(php_stream_buffer * buffer, const char * buf, size_t size);
struct _php_stream {
php_stream_ops * ops;
void * abstract; /* convenience pointer for abstraction */
int eof;
/* for convenience for sockets */
int is_blocked;
struct timeval timeout;
int timeout_event;
int readahead; /* number of chunks to read-ahead */
int is_persistent;
char mode[16]; /* "rwb" etc. ala stdio */
/* the stream can be buffered */
int is_buffered;
php_stream_buffer readbuf;
FILE * stdiocast; /* cache this, otherwise we might leak! */
}; /* php_stream */
/* allocate a new stream for a particular ops */
PHPAPI php_stream * php_stream_alloc(php_stream_ops * ops, void * abstract, size_t bufsize, int persistent, const char * mode);
PHPAPI int php_stream_free(php_stream * stream, int call_dtor);
#define php_stream_close(stream) php_stream_free(stream, 1)
/* seeking is only supported for reading! */
PHPAPI int php_stream_seek(php_stream * stream, off_t offset, int whence);
PHPAPI off_t php_stream_tell(php_stream * stream);
PHPAPI size_t php_stream_read(php_stream * stream, char * buf, size_t count);
PHPAPI size_t php_stream_write(php_stream * stream, const char * buf, size_t count);
PHPAPI int php_stream_eof(php_stream * stream);
PHPAPI int php_stream_getc(php_stream * stream);
PHPAPI int php_stream_flush(php_stream * stream);
PHPAPI char *php_stream_gets(php_stream * stream, char *buf, size_t maxlen);
/* operations for a stdio FILE; the FILE * must be placed in stream->abstract */
extern php_stream_ops php_stream_stdio_ops;
/* like fopen, but returns a stream */
PHPAPI php_stream * php_stream_fopen(const char * filename, const char * mode);
/* coerce the stream into some other form */
/* cast as a stdio FILE * */
#define PHP_STREAM_AS_STDIO 0
/* cast as a POSIX fd or socketd */
#define PHP_STREAM_AS_FD 1
/* cast as a socketd */
#define PHP_STREAM_AS_SOCKETD 2
/* warning: once you have cast a stream as a FILE*, you probably should not use
the php_stream_XXX api after that point, or you will confuse the buffering
in FILE* and/or php_stream *
*/
PHPAPI int php_stream_cast(php_stream * stream, int castas, void ** ret, int show_err);
/* use this to check if a stream can be cast into another form */
#define php_stream_can_cast(stream, as) php_stream_cast(stream, as, NULL, 0)
#endif /* HAVE_PHP_STREAM */
#endif
|
