lib/util/xfile.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    stdio replacement
   4    Copyright (C) Andrew Tridgell 2001
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef _XFILE_H_
  21 #define _XFILE_H_
  22
  23 #include <stdarg.h>
  24 #include <stddef.h>
  25 #include <sys/stat.h>
  26 #include "attr.h"
  27
  28 /*
  29   see xfile.c for explanations
  30 */
  31
  32 typedef struct _XFILE {
  33         int fd;
  34         char *buf;
  35         char *next;
  36         int bufsize;
  37         int bufused;
  38         int open_flags;
  39         int buftype;
  40         int flags;
  41 } XFILE;
  42
  43 extern XFILE *x_stdin, *x_stdout, *x_stderr;
  44
  45 /* buffering type */
  46 #define X_IOFBF 0
  47 #define X_IOLBF 1
  48 #define X_IONBF 2
  49
  50 #define x_getc(f) x_fgetc(f)
  51
  52 int x_vfprintf(XFILE *f, const char *format, va_list ap) PRINTF_ATTRIBUTE(2, 0);
  53 int x_fprintf(XFILE *f, const char *format, ...) PRINTF_ATTRIBUTE(2, 3);
  54
  55 /** simulate setvbuf() */
  56 int x_setvbuf(XFILE *f, char *buf, int mode, size_t size);
  57
  58 /** this looks more like open() than fopen(), but that is quite deliberate.
  59    I want programmers to *think* about O_EXCL, O_CREAT etc not just
  60    get them magically added
  61 */
  62 XFILE *x_fopen(const char *fname, int flags, mode_t mode);
  63
  64 /** simulate fclose() */
  65 int x_fclose(XFILE *f);
  66
  67 /** simulate fwrite() */
  68 size_t x_fwrite(const void *p, size_t size, size_t nmemb, XFILE *f);
  69
  70 /** thank goodness for asprintf() */
  71 int x_fileno(const XFILE *f);
  72
  73 /** simulate fflush() */
  74 int x_fflush(XFILE *f);
  75
  76 /** simulate setbuffer() */
  77 void x_setbuffer(XFILE *f, char *buf, size_t size);
  78
  79 /** simulate setbuf() */
  80 void x_setbuf(XFILE *f, char *buf);
  81
  82 /** simulate setlinebuf() */
  83 void x_setlinebuf(XFILE *f);
  84
  85 /** simulate feof() */
  86 int x_feof(XFILE *f);
  87
  88 /** simulate ferror() */
  89 int x_ferror(XFILE *f);
  90
  91 /** simulate fgetc() */
  92 int x_fgetc(XFILE *f);
  93
  94 /** simulate fread */
  95 size_t x_fread(void *p, size_t size, size_t nmemb, XFILE *f);
  96
  97 /** simulate fgets() */
  98 char *x_fgets(char *s, int size, XFILE *stream) ;
  99
 100 /**
 101  * trivial seek, works only for SEEK_SET and SEEK_END if SEEK_CUR is
 102  * set then an error is returned */
 103 off_t x_tseek(XFILE *f, off_t offset, int whence);
 104
 105 XFILE *x_fdup(const XFILE *f);
 106
 107 #endif /* _XFILE_H_ */