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/* conversion.c - String conversion helper functions.
* Copyright (C) 2000 Werner Koch (dd9jn)
* Copyright (C) 2001, 2002 g10 Code GmbH
*
* This file is part of GPGME.
*
* GPGME 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.
*
* GPGME 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 02111-1307, USA
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <sys/types.h>
#include "gpgme.h"
#include "util.h"
int
_gpgme_hextobyte (const byte *str)
{
int val = 0;
int i;
#define NROFHEXDIGITS 2
for (i = 0; i < NROFHEXDIGITS; i++)
{
if (*str >= '0' && *str <= '9')
val += *str - '0';
else if (*str >= 'A' && *str <= 'F')
val += 10 + *str - 'A';
else if (*str >= 'a' && *str <= 'f')
val += 10 + *str - 'a';
else
return -1;
if (i < NROFHEXDIGITS - 1)
val *= 16;
str++;
}
return val;
}
GpgmeError
_gpgme_decode_c_string (const char *src, char **destp)
{
char *dest;
/* We can malloc a buffer of the same length, because the converted
string will never be larger. */
dest = xtrymalloc (strlen (src) + 1);
if (!dest)
return mk_error (Out_Of_Core);
*destp = dest;
while (*src)
{
if (*src != '\\')
*(dest++) = *(src++);
else if (src[1] == '\\')
{
src++;
*(dest++) = *(src++);
}
else if (src[1] == 'n')
{
src += 2;
*(dest++) = '\n';
}
else if (src[1] == 'r')
{
src += 2;
*(dest++) = '\r';
}
else if (src[1] == 'v')
{
src += 2;
*(dest++) = '\v';
}
else if (src[1] == 'b')
{
src += 2;
*(dest++) = '\b';
}
else if (src[1] == '0')
{
/* Hmmm: no way to express this */
src += 2;
*(dest++) = '\\';
*(dest++) = '\0';
}
else if (src[1] == 'x' && isxdigit (src[2]) && isxdigit (src[3]))
{
int val = _gpgme_hextobyte (&src[2]);
if (val == -1)
{
/* Should not happen. */
*(dest++) = *(src++);
*(dest++) = *(src++);
*(dest++) = *(src++);
*(dest++) = *(src++);
}
else
{
if (!val)
{
*(dest++) = '\\';
*(dest++) = '\0';
}
else
*(byte*)dest++ = val;
src += 4;
}
}
else
{
/* should not happen */
src++;
*(dest++) = '\\';
*(dest++) = *(src++);
}
}
*(dest++) = 0;
return 0;
}
GpgmeError
_gpgme_data_append (GpgmeData dh, const char *buffer, size_t length)
{
if (!dh || !buffer)
return mk_error (Invalid_Value);
do
{
ssize_t amt = gpgme_data_write (dh, buffer, length);
if (amt == 0 || (amt < 0 && errno != EINTR))
return mk_error (File_Error);
buffer += amt;
length -= amt;
}
while (length > 0);
return 0;
}
GpgmeError
_gpgme_data_append_string (GpgmeData dh, const char *str)
{
if (!str)
return 0;
return _gpgme_data_append (dh, str, strlen (str));
}
GpgmeError
_gpgme_data_append_for_xml (GpgmeData dh, const char *buffer, size_t len)
{
const char *text, *str;
size_t count;
int err = 0;
if (!dh || !buffer)
return mk_error (Invalid_Value);
do
{
text = NULL;
str = buffer;
for (count = len; count && !text; str++, count--)
{
if (*str == '<')
text = "&lt;";
else if (*str == '>')
text = "&gt;"; /* Not sure whether this is really needed. */
else if (*str == '&')
text = "&amp;";
else if (!*str)
text = "&#00;";
}
if (text)
{
str--;
count++;
}
if (str != buffer)
err = _gpgme_data_append (dh, buffer, str - buffer);
if (!err && text)
{
err = _gpgme_data_append_string (dh, text);
str++;
count--;
}
buffer = str;
len = count;
}
while (!err && len);
return err;
}
/* Append a string to DATA and convert it so that the result will be
valid XML. */
GpgmeError
_gpgme_data_append_string_for_xml (GpgmeData dh, const char *str)
{
return _gpgme_data_append_for_xml (dh, str, strlen (str));
}
/* Append a string with percent style (%XX) escape characters as
XML. */
GpgmeError
_gpgme_data_append_percentstring_for_xml (GpgmeData dh, const char *str)
{
const byte *src;
byte *buf, *dst;
int val;
GpgmeError err;
buf = xtrymalloc (strlen (str));
dst = buf;
for (src = str; *src; src++)
{
if (*src == '%' && (val = _gpgme_hextobyte (src + 1)) != -1)
{
*dst++ = val;
src += 2;
}
else
*dst++ = *src;
}
err = _gpgme_data_append_for_xml (dh, buf, dst - buf);
xfree (buf);
return err;
}

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Mime Type
text/x-c
Expires
Mon, Dec 23, 3:23 PM (39 m, 54 s)
Storage Engine
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Storage Format
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Storage Handle
0f/83/717416a0ba153ca7f9796be64418

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