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/* assuan-util.c - Utility functions for Assuan
* Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
* Copyright (C) 2005 Free Software Foundation, Inc.
*
* This file is part of Assuan.
*
* Assuan is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Assuan 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* Please note that this is a stripped down and modified version of
the orginal Assuan code from libassuan. */
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "assuan-defs.h"
/* Store the error in the context so that the error sending function
can take out a descriptive text. Inside the assuan code, use the
macro set_error instead of this function. */
int
assuan_set_error (assuan_context_t ctx, int err, const char *text)
{
ctx->err_no = err;
ctx->err_str = text;
return err;
}
void
assuan_set_pointer (assuan_context_t ctx, void *pointer)
{
if (ctx)
ctx->user_pointer = pointer;
}
void *
assuan_get_pointer (assuan_context_t ctx)
{
return ctx? ctx->user_pointer : NULL;
}
void
assuan_set_log_stream (assuan_context_t ctx, FILE *fp)
{
if (ctx)
{
if (ctx->log_fp)
fflush (ctx->log_fp);
ctx->log_fp = fp;
_assuan_set_default_log_stream (fp);
}
}
void
assuan_begin_confidential (assuan_context_t ctx)
{
if (ctx)
{
ctx->confidential = 1;
}
}
void
assuan_end_confidential (assuan_context_t ctx)
{
if (ctx)
{
ctx->confidential = 0;
}
}
/* Dump a possibly binary string (used for debugging). Distinguish
ascii text from binary and print it accordingly. */
void
_assuan_log_print_buffer (FILE *fp, const void *buffer, size_t length)
{
const unsigned char *s;
int n;
for (n=length,s=buffer; n; n--, s++)
if ((!isascii (*s) || iscntrl (*s) || !isprint (*s)) && !(*s >= 0x80))
break;
s = buffer;
if (!n && *s != '[')
fwrite (buffer, length, 1, fp);
else
{
putc ('[', fp);
for (n=0; n < length; n++, s++)
fprintf (fp, " %02x", *s);
putc (' ', fp);
putc (']', fp);
}
}
/* Log a user supplied string. Escapes non-printable before
printing. */
void
_assuan_log_sanitized_string (const char *string)
{
const unsigned char *s = string;
FILE *fp = assuan_get_assuan_log_stream ();
if (! *s)
return;
for (; *s; s++)
{
int c = 0;
switch (*s)
{
case '\r':
c = 'r';
break;
case '\n':
c = 'n';
break;
case '\f':
c = 'f';
break;
case '\v':
c = 'v';
break;
case '\b':
c = 'b';
break;
default:
if ((isascii (*s) && isprint (*s)) || (*s >= 0x80))
putc (*s, fp);
else
{
putc ('\\', fp);
fprintf (fp, "x%02x", *s);
}
}
if (c)
{
putc ('\\', fp);
putc (c, fp);
}
}
}
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