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