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/*
* fhist - file history and comparison tools
* Copyright (C) 2000 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 for reading input and converting to hexadecimal bytes
*/
#include <ac/ctype.h>
#include <ac/stdio.h> /* for sprintf */
#include <error.h>
#include <input/hexify.h>
#include <input/private.h>
#include <trace.h>
typedef struct input_hexify_ty input_hexify_ty;
struct input_hexify_ty
{
input_ty inherited;
input_ty *deeper;
int delete_on_close;
int buf_pos;
char buffer[16];
};
static void destruct _((input_ty *));
static void
destruct(p)
input_ty *p;
{
input_hexify_ty *this;
trace(("input_hexify::destruct()\n{\n"));
this = (input_hexify_ty *)p;
input_pushback_transfer(this->deeper, p);
if (this->delete_on_close)
input_delete(this->deeper);
this->deeper = 0; /* paranoia */
trace(("}\n"));
}
static int get _((input_ty *));
static int
get(p)
input_ty *p;
{
input_hexify_ty *this;
int c;
trace(("input_hexify::get()\n{\n"));
this = (input_hexify_ty *)p;
if (this->buffer[this->buf_pos] == 0)
{
char *ctrl = "";
char *meta = "";
int c2;
c = input_getc(this->deeper);
if (c < 0)
{
trace(("return EOF;\n"));
return -1;
}
c2 = c;
if (c2 & 0x80)
{
meta = "M-";
c2 &= 0x7F;
}
if (!isprint(c2))
{
ctrl = "^";
c2 ^= 0x40;
}
sprintf(this->buffer, "0x%02X %s%s%c\n", c, meta, ctrl, c2);
this->buf_pos = 0;
}
c = this->buffer[this->buf_pos++];
trace(("return %d;\n", c));
trace(("}\n"));
return c;
}
static long itell _((input_ty *));
static long
itell(fp)
input_ty *fp;
{
input_hexify_ty *this;
this = (input_hexify_ty *)fp;
trace(("input_hexify::tell => %ld\n", this->pos));
return input_ftell(this->deeper);
}
static const char *name _((input_ty *));
static const char *
name(p)
input_ty *p;
{
input_hexify_ty *this;
trace(("input_hexify::name\n"));
this = (input_hexify_ty *)p;
return input_name(this->deeper);
}
static long length _((input_ty *));
static long
length(p)
input_ty *p;
{
trace(("input_hexify::length => -1\n"));
return -1;
}
static input_vtbl_ty vtbl =
{
sizeof(input_hexify_ty),
destruct,
input_generic_read,
get,
itell,
name,
length,
};
input_ty *
input_hexify(deeper, delete_on_close)
input_ty *deeper;
int delete_on_close;
{
input_ty *result;
input_hexify_ty *this;
trace(("input_hexify(fp = %08lX)\n{\n", (long)fp));
result = input_new(&vtbl);
this = (input_hexify_ty *)result;
this->deeper = deeper;
this->delete_on_close = delete_on_close;
this->buf_pos = 0;
this->buffer[0] = 0;
trace(("return %08lX\n", (long)result));
trace(("}\n"));
return result;
}
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