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/* estream.h - Extended stream I/O/ Library
* Copyright (C) 2004, 2005, 2006, 2007 g10 Code GmbH
*
* This file is part of Libestream.
*
* Libestream is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* Libestream is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Libestream; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#ifndef ESTREAM_H
#define ESTREAM_H
#include <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
/* To use this file with libraries the following macro is useful:
#define _ESTREAM_EXT_SYM_PREFIX _foo_
This prefixes all external symbols with "_foo_".
*/
#ifdef _ESTREAM_EXT_SYM_PREFIX
#ifndef _ESTREAM_PREFIX
#define _ESTREAM_PREFIX1(x,y) x ## y
#define _ESTREAM_PREFIX2(x,y) _ESTREAM_PREFIX1(x,y)
#define _ESTREAM_PREFIX(x) _ESTREAM_PREFIX2(_ESTREAM_EXT_SYM_PREFIX,x)
#endif /*_ESTREAM_PREFIX*/
#define es_fopen _ESTREAM_PREFIX(es_fopen)
#define es_mopen _ESTREAM_PREFIX(es_mopen)
#define es_open_memstream _ESTREAM_PREFIX(es_open_memstream)
#define es_fdopen _ESTREAM_PREFIX(es_fdopen)
#define es_fdopen_nc _ESTREAM_PREFIX(es_fdopen_nc)
#define es_fpopen _ESTREAM_PREFIX(es_fpopen)
#define es_fpopen_nc _ESTREAM_PREFIX(es_fpopen_nc)
#define es_freopen _ESTREAM_PREFIX(es_freopen)
#define es_fopencookie _ESTREAM_PREFIX(es_fopencookie)
#define es_fclose _ESTREAM_PREFIX(es_fclose)
#define es_fileno _ESTREAM_PREFIX(es_fileno)
#define es_fileno_unlocked _ESTREAM_PREFIX(es_fileno_unlocked)
#define es_flockfile _ESTREAM_PREFIX(es_flockfile)
#define es_ftrylockfile _ESTREAM_PREFIX(es_ftrylockfile)
#define es_funlockfile _ESTREAM_PREFIX(es_funlockfile)
#define es_feof _ESTREAM_PREFIX(es_feof)
#define es_feof_unlocked _ESTREAM_PREFIX(es_feof_unlocked)
#define es_ferror _ESTREAM_PREFIX(es_ferror)
#define es_ferror_unlocked _ESTREAM_PREFIX(es_ferror_unlocked)
#define es_clearerr _ESTREAM_PREFIX(es_clearerr)
#define es_clearerr_unlocked _ESTREAM_PREFIX(es_clearerr_unlocked)
#define es_fflush _ESTREAM_PREFIX(es_fflush)
#define es_fseek _ESTREAM_PREFIX(es_fseek)
#define es_fseeko _ESTREAM_PREFIX(es_fseeko)
#define es_ftell _ESTREAM_PREFIX(es_ftell)
#define es_ftello _ESTREAM_PREFIX(es_ftello)
#define es_rewind _ESTREAM_PREFIX(es_rewind)
#define es_fgetc _ESTREAM_PREFIX(es_fgetc)
#define es_fputc _ESTREAM_PREFIX(es_fputc)
#define _es_getc_underflow _ESTREAM_PREFIX(_es_getc_underflow)
#define _es_putc_overflow _ESTREAM_PREFIX(_es_putc_overflow)
#define es_ungetc _ESTREAM_PREFIX(es_ungetc)
#define es_read _ESTREAM_PREFIX(es_read)
#define es_write _ESTREAM_PREFIX(es_write)
#define es_write_sanitized _ESTREAM_PREFIX(es_write_sanitized)
#define es_write_hexstring _ESTREAM_PREFIX(es_write_hexstring)
#define es_fread _ESTREAM_PREFIX(es_fread)
#define es_fwrite _ESTREAM_PREFIX(es_fwrite)
#define es_fgets _ESTREAM_PREFIX(es_fgets)
#define es_fputs _ESTREAM_PREFIX(es_fputs)
#define es_getline _ESTREAM_PREFIX(es_getline)
#define es_read_line _ESTREAM_PREFIX(es_read_line)
#define es_free _ESTREAM_PREFIX(es_free)
#define es_fprf _ESTREAM_PREFIX(es_fprf)
#define es_vfprf _ESTREAM_PREFIX(es_vfprf)
#define es_setvbuf _ESTREAM_PREFIX(es_setvbuf)
#define es_setbuf _ESTREAM_PREFIX(es_setbuf)
#define es_tmpfile _ESTREAM_PREFIX(es_tmpfile)
#define es_opaque_set _ESTREAM_PREFIX(es_opaque_set)
#define es_opaque_get _ESTREAM_PREFIX(es_opaque_get)
#define es_write_sanitized_utf8_buffer \
_ESTREAM_PREFIX(es_write_sanitized_utf8_buffer)
#endif /*_ESTREAM_EXT_SYM_PREFIX*/
#ifdef __cplusplus
extern "C"
{
#if 0
}
#endif
#endif
/* Forward declaration for the (opaque) internal type. */
struct estream_internal;
/* The definition of this struct is entirely private. You must not
use it for anything. It is only here so some functions can be
implemented as macros. */
struct es__stream
{
/* The layout of this struct must never change. It may be grown,
but only if all functions which access the new members are
versioned. */
/* A pointer to the stream buffer. */
unsigned char *buffer;
/* The size of the buffer in bytes. */
size_t buffer_size;
/* The length of the usable data in the buffer, only valid when in
read mode (see flags). */
size_t data_len;
/* The current position of the offset pointer, valid in read and
write mode. */
size_t data_offset;
size_t data_flushed;
unsigned char *unread_buffer;
size_t unread_buffer_size;
/* The number of unread bytes. */
size_t unread_data_len;
/* Various flags. */
struct {
unsigned int writing: 1;
unsigned int reserved: 7;
} flags;
/* A pointer to our internal data for this stream. */
struct estream_internal *intern;
};
/* The opaque type for an estream. */
typedef struct es__stream *estream_t;
typedef ssize_t (*es_cookie_read_function_t) (void *cookie,
void *buffer, size_t size);
typedef ssize_t (*es_cookie_write_function_t) (void *cookie,
const void *buffer,
size_t size);
typedef int (*es_cookie_seek_function_t) (void *cookie,
off_t *pos, int whence);
typedef int (*es_cookie_close_function_t) (void *cookie);
typedef struct es_cookie_io_functions
{
es_cookie_read_function_t func_read;
es_cookie_write_function_t func_write;
es_cookie_seek_function_t func_seek;
es_cookie_close_function_t func_close;
} es_cookie_io_functions_t;
#ifndef _ESTREAM_GCC_A_PRINTF
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
# define _ESTREAM_GCC_A_PRINTF( f, a ) __attribute__ ((format (printf,f,a)))
#else
# define _ESTREAM_GCC_A_PRINTF( f, a )
#endif
#endif /*_ESTREAM_GCC_A_PRINTF*/
#ifndef ES__RESTRICT
# if defined __GNUC__ && defined __GNUC_MINOR__
# if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 92))
# define ES__RESTRICT __restrict__
# endif
# endif
#endif
#ifndef ES__RESTRICT
# define ES__RESTRICT
#endif
int es_init (void);
estream_t es_fopen (const char *ES__RESTRICT path,
const char *ES__RESTRICT mode);
estream_t es_mopen (unsigned char *ES__RESTRICT data,
size_t data_n, size_t data_len,
unsigned int grow,
void *(*func_realloc) (void *mem, size_t size),
void (*func_free) (void *mem),
const char *ES__RESTRICT mode);
estream_t es_open_memstream (char **ptr, size_t *size);
estream_t es_fdopen (int filedes, const char *mode);
estream_t es_fdopen_nc (int filedes, const char *mode);
estream_t es_fpopen (FILE *fp, const char *mode);
estream_t es_fpopen_nc (FILE *fp, const char *mode);
estream_t es_freopen (const char *ES__RESTRICT path,
const char *ES__RESTRICT mode,
estream_t ES__RESTRICT stream);
estream_t es_fopencookie (void *ES__RESTRICT cookie,
const char *ES__RESTRICT mode,
es_cookie_io_functions_t functions);
int es_fclose (estream_t stream);
int es_fileno (estream_t stream);
int es_fileno_unlocked (estream_t stream);
void es_flockfile (estream_t stream);
int es_ftrylockfile (estream_t stream);
void es_funlockfile (estream_t stream);
int es_feof (estream_t stream);
int es_feof_unlocked (estream_t stream);
int es_ferror (estream_t stream);
int es_ferror_unlocked (estream_t stream);
void es_clearerr (estream_t stream);
void es_clearerr_unlocked (estream_t stream);
int es_fflush (estream_t stream);
int es_fseek (estream_t stream, long int offset, int whence);
int es_fseeko (estream_t stream, off_t offset, int whence);
long int es_ftell (estream_t stream);
off_t es_ftello (estream_t stream);
void es_rewind (estream_t stream);
int es_fgetc (estream_t stream);
int es_fputc (int c, estream_t stream);
int _es_getc_underflow (estream_t stream);
int _es_putc_overflow (int c, estream_t stream);
#define es_getc_unlocked(stream) \
(((!(stream)->flags.writing) \
&& ((stream)->data_offset < (stream)->data_len) \
&& (! (stream)->unread_data_len)) \
? ((int) (stream)->buffer[((stream)->data_offset)++]) \
: _es_getc_underflow ((stream)))
#define es_putc_unlocked(c, stream) \
(((stream)->flags.writing \
&& ((stream)->data_offset < (stream)->buffer_size) \
&& (c != '\n')) \
? ((int) ((stream)->buffer[((stream)->data_offset)++] = (c))) \
: _es_putc_overflow ((c), (stream)))
#define es_getc(stream) es_fgetc (stream)
#define es_putc(c, stream) es_fputc (c, stream)
int es_ungetc (int c, estream_t stream);
int es_read (estream_t ES__RESTRICT stream,
void *ES__RESTRICT buffer, size_t bytes_to_read,
size_t *ES__RESTRICT bytes_read);
int es_write (estream_t ES__RESTRICT stream,
const void *ES__RESTRICT buffer, size_t bytes_to_write,
size_t *ES__RESTRICT bytes_written);
int es_write_sanitized (estream_t ES__RESTRICT stream,
const void *ES__RESTRICT buffer, size_t length,
const char *delimiters,
size_t *ES__RESTRICT bytes_written);
int es_write_hexstring (estream_t ES__RESTRICT stream,
const void *ES__RESTRICT buffer, size_t length,
int reserved, size_t *ES__RESTRICT bytes_written);
size_t es_fread (void *ES__RESTRICT ptr, size_t size, size_t nitems,
estream_t ES__RESTRICT stream);
size_t es_fwrite (const void *ES__RESTRICT ptr, size_t size, size_t memb,
estream_t ES__RESTRICT stream);
char *es_fgets (char *ES__RESTRICT s, int n, estream_t ES__RESTRICT stream);
int es_fputs (const char *ES__RESTRICT s, estream_t ES__RESTRICT stream);
ssize_t es_getline (char *ES__RESTRICT *ES__RESTRICT lineptr,
size_t *ES__RESTRICT n,
estream_t stream);
ssize_t es_read_line (estream_t stream,
char **addr_of_buffer, size_t *length_of_buffer,
size_t *max_length);
void es_free (void *a);
int es_fprintf (estream_t ES__RESTRICT stream,
const char *ES__RESTRICT format, ...)
_ESTREAM_GCC_A_PRINTF(2,3);
int es_vfprintf (estream_t ES__RESTRICT stream,
const char *ES__RESTRICT format, va_list ap)
_ESTREAM_GCC_A_PRINTF(2,0);
int es_setvbuf (estream_t ES__RESTRICT stream,
char *ES__RESTRICT buf, int mode, size_t size);
void es_setbuf (estream_t ES__RESTRICT stream, char *ES__RESTRICT buf);
estream_t es_tmpfile (void);
void es_opaque_set (estream_t ES__RESTRICT stream, void *ES__RESTRICT opaque);
void *es_opaque_get (estream_t stream);
#ifdef GNUPG_MAJOR_VERSION
int es_write_sanitized_utf8_buffer (estream_t stream,
const void *buffer, size_t length,
const char *delimiters,
size_t *bytes_written);
#endif /*GNUPG_MAJOR_VERSION*/
#ifdef __cplusplus
}
#endif
#endif /*ESTREAM_H*/

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