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b008274afd
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
181 lines
6.2 KiB
C
181 lines
6.2 KiB
C
/* iobuf.h - I/O buffer
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* Copyright (C) 1998, 1999, 2000, 2001, 2003,
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* 2010 Free Software Foundation, Inc.
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*
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* This file is part of GNUPG.
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*
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* GNUPG 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 by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNUPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GNUPG_COMMON_IOBUF_H
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#define GNUPG_COMMON_IOBUF_H
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#include "../include/types.h" /* fixme: should be moved elsewhere. */
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#include "../common/sysutils.h"
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#include "../common/estream.h"
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#define DBG_IOBUF iobuf_debug_mode
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/* Filter control modes. */
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#define IOBUFCTRL_INIT 1
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#define IOBUFCTRL_FREE 2
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#define IOBUFCTRL_UNDERFLOW 3
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#define IOBUFCTRL_FLUSH 4
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#define IOBUFCTRL_DESC 5
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#define IOBUFCTRL_CANCEL 6
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#define IOBUFCTRL_USER 16
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/* Command codes for iobuf_ioctl. */
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typedef enum
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{
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IOBUF_IOCTL_KEEP_OPEN = 1, /* Uses intval. */
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IOBUF_IOCTL_INVALIDATE_CACHE = 2, /* Uses ptrval. */
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IOBUF_IOCTL_NO_CACHE = 3, /* Uses intval. */
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IOBUF_IOCTL_FSYNC = 4 /* Uses ptrval. */
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} iobuf_ioctl_t;
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typedef struct iobuf_struct *iobuf_t;
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typedef struct iobuf_struct *IOBUF; /* Compatibility with gpg 1.4. */
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/* fixme: we should hide most of this stuff */
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struct iobuf_struct
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{
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int use; /* 1 input , 2 output, 3 temp */
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off_t nlimit;
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off_t nbytes; /* Used together with nlimit. */
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off_t ntotal; /* Total bytes read (position of stream). */
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int nofast; /* Used by the iobuf_get (). */
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void *directfp;
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struct
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{
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size_t size; /* Allocated size */
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size_t start; /* Number of invalid bytes at the
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begin of the buffer */
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size_t len; /* Currently filled to this size */
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byte *buf;
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} d;
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int filter_eof;
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int error;
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int (*filter) (void *opaque, int control,
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iobuf_t chain, byte * buf, size_t * len);
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void *filter_ov; /* Value for opaque */
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int filter_ov_owner;
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char *real_fname;
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iobuf_t chain; /* Next iobuf used for i/o if any
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(passed to filter) */
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int no, subno;
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const char *desc;
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void *opaque; /* Can be used to hold any information
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this value is copied to all
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instances */
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};
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#ifndef EXTERN_UNLESS_MAIN_MODULE
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#if defined (__riscos__) && !defined (INCLUDED_BY_MAIN_MODULE)
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#define EXTERN_UNLESS_MAIN_MODULE extern
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#else
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#define EXTERN_UNLESS_MAIN_MODULE
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#endif
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#endif
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EXTERN_UNLESS_MAIN_MODULE int iobuf_debug_mode;
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void iobuf_enable_special_filenames (int yes);
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int iobuf_is_pipe_filename (const char *fname);
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iobuf_t iobuf_alloc (int use, size_t bufsize);
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iobuf_t iobuf_temp (void);
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iobuf_t iobuf_temp_with_content (const char *buffer, size_t length);
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iobuf_t iobuf_open_fd_or_name (gnupg_fd_t fd, const char *fname,
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const char *mode);
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iobuf_t iobuf_open (const char *fname);
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iobuf_t iobuf_fdopen (int fd, const char *mode);
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iobuf_t iobuf_fdopen_nc (int fd, const char *mode);
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iobuf_t iobuf_esopen (estream_t estream, const char *mode, int keep_open);
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iobuf_t iobuf_sockopen (int fd, const char *mode);
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iobuf_t iobuf_create (const char *fname);
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iobuf_t iobuf_append (const char *fname);
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iobuf_t iobuf_openrw (const char *fname);
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int iobuf_ioctl (iobuf_t a, iobuf_ioctl_t cmd, int intval, void *ptrval);
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int iobuf_close (iobuf_t iobuf);
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int iobuf_cancel (iobuf_t iobuf);
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int iobuf_push_filter (iobuf_t a, int (*f) (void *opaque, int control,
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iobuf_t chain, byte * buf,
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size_t * len), void *ov);
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int iobuf_push_filter2 (iobuf_t a,
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int (*f) (void *opaque, int control, iobuf_t chain,
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byte * buf, size_t * len), void *ov,
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int rel_ov);
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int iobuf_flush (iobuf_t a);
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void iobuf_clear_eof (iobuf_t a);
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#define iobuf_set_error(a) do { (a)->error = 1; } while(0)
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#define iobuf_error(a) ((a)->error)
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void iobuf_set_limit (iobuf_t a, off_t nlimit);
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off_t iobuf_tell (iobuf_t a);
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int iobuf_seek (iobuf_t a, off_t newpos);
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int iobuf_readbyte (iobuf_t a);
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int iobuf_read (iobuf_t a, void *buf, unsigned buflen);
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void iobuf_unread (iobuf_t a, const unsigned char *buf, unsigned int buflen);
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unsigned iobuf_read_line (iobuf_t a, byte ** addr_of_buffer,
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unsigned *length_of_buffer, unsigned *max_length);
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int iobuf_peek (iobuf_t a, byte * buf, unsigned buflen);
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int iobuf_writebyte (iobuf_t a, unsigned c);
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int iobuf_write (iobuf_t a, const void *buf, unsigned buflen);
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int iobuf_writestr (iobuf_t a, const char *buf);
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void iobuf_flush_temp (iobuf_t temp);
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int iobuf_write_temp (iobuf_t a, iobuf_t temp);
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size_t iobuf_temp_to_buffer (iobuf_t a, byte * buffer, size_t buflen);
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off_t iobuf_get_filelength (iobuf_t a, int *overflow);
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#define IOBUF_FILELENGTH_LIMIT 0xffffffff
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int iobuf_get_fd (iobuf_t a);
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const char *iobuf_get_real_fname (iobuf_t a);
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const char *iobuf_get_fname (iobuf_t a);
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const char *iobuf_get_fname_nonnull (iobuf_t a);
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void iobuf_set_partial_block_mode (iobuf_t a, size_t len);
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void iobuf_skip_rest (iobuf_t a, unsigned long n, int partial);
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/* Get a byte from the iobuf; must check for eof prior to this
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* function. This function returns values in the range 0 .. 255 or -1
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* to indicate EOF. iobuf_get_noeof() does not return -1 to indicate
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* EOF, but masks the returned value to be in the range 0 .. 255.
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*/
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#define iobuf_get(a) \
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( ((a)->nofast || (a)->d.start >= (a)->d.len )? \
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iobuf_readbyte((a)) : ( (a)->nbytes++, (a)->d.buf[(a)->d.start++] ) )
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#define iobuf_get_noeof(a) (iobuf_get((a))&0xff)
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/* write a byte to the iobuf and return true on write error
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* This macro does only write the low order byte
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*/
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#define iobuf_put(a,c) iobuf_writebyte(a,c)
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#define iobuf_where(a) "[don't know]"
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#define iobuf_id(a) ((a)->no)
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#define iobuf_get_temp_buffer(a) ( (a)->d.buf )
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#define iobuf_get_temp_length(a) ( (a)->d.len )
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#define iobuf_is_temp(a) ( (a)->use == 3 )
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#endif /*GNUPG_COMMON_IOBUF_H*/
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