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Sourcecode: fhist version File versions

file.c

/*
 *    fhist - file history and comparison tools
 *    Copyright (C) 2000, 2002 Peter Miller;
 *    All rights reserved.
 *
 *    This program 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.
 *
 *    This program 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to deliver output to files
 */

#include <ac/errno.h>
#include <ac/stdio.h>

#include <fcheck.h>
#include <mem.h>
#include <output/file.h>
#include <output/private.h>
#include <output/stdout.h>
#include <error_intl.h>


typedef struct output_file_ty output_file_ty;
struct output_file_ty
{
      output_ty   inherited;
      char        *filename;
      FILE        *deeper;
};


static void
destructor(output_ty *fp)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      fflush_and_check(this->deeper, this->filename);
      fclose_and_check(this->deeper, this->filename);
      mem_free(this->filename);
}


static const char *
filename(output_ty *fp)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      return this->filename;
}


static long
otell(output_ty *fp)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      return ftell(this->deeper);
}


static void
oputc(output_ty *fp, int c)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      if (putc(c, this->deeper) == EOF)
      {
            sub_context_ty    *scp;

            scp = sub_context_new();
            sub_errno_set(scp);
            sub_var_set_charstar(scp, "File_Name", this->filename);
            fatal_intl(scp, i18n("write \"$filename\": $errno"));
            /* NOTREACHED */
      }
}


static void
owrite(output_ty *fp, const void *data, size_t len)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      if (fwrite(data, 1, len, this->deeper) == EOF)
      {
            sub_context_ty    *scp;

            scp = sub_context_new();
            sub_errno_set(scp);
            sub_var_set_charstar(scp, "File_Name", this->filename);
            fatal_intl(scp, i18n("write \"$filename\": $errno"));
            /* NOTREACHED */
      }
}


static void
oflush(output_ty *fp)
{
      output_file_ty    *this;

      this = (output_file_ty *)fp;
      if (fflush(this->deeper))
      {
            sub_context_ty    *scp;

            scp = sub_context_new();
            sub_errno_set(scp);
            sub_var_set_charstar(scp, "File_Name", this->filename);
            fatal_intl(scp, i18n("write \"$filename\": $errno"));
            /* NOTREACHED */
      }
}


static output_vtbl_ty vtbl =
{
      sizeof(output_file_ty),
      destructor,
      filename,
      otell,
      oputc,
      output_generic_fputs,
      owrite,
      oflush,
      "file",
};


static output_ty *
output_file_open(const char *fn, const char *mode)
{
      output_ty   *result;
      output_file_ty    *this;

      if (!fn || !*fn)
            return output_stdout();
      result = output_new(&vtbl);
      this = (output_file_ty *)result;
      this->deeper = fopen_and_check(fn, mode);
      this->filename = mem_copy_string(fn);
      return result;
}


output_ty *
output_file_text_open(const char *fn)
{
      return output_file_open(fn, "w");
}


output_ty *
output_file_binary_open(const char *fn)
{
      return output_file_open(fn, "wb");
}

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