bf_buff.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <errno.h>
#include "cryptlib.h"
static int buffer_new(BIO *h);
#define DEFAULT_BUFFER_SIZE 4096
static BIO_METHOD methods_buffer=
{
"buffer",
};
BIO_METHOD *BIO_f_buffer(void)
{
return(&methods_buffer);
}
{
return(1);
}
static int buffer_free(BIO *a)
{
BIO_F_BUFFER_CTX *b;
if (a == NULL) return(0);
b=(BIO_F_BUFFER_CTX *)a->ptr;
OPENSSL_free(a->ptr);
a->init=0;
a->flags=0;
return(1);
}
{
int i,num=0;
num=0;
/* If there is stuff left over, grab it */
if (i != 0)
{
num+=i;
outl-=i;
out+=i;
}
/* We may have done a partial read. try to do more.
* We have nothing in the buffer.
* If we get an error and have read some data, just return it
* and let them retry to get the error again.
* copy direct to parent address space */
{
for (;;)
{
if (i <= 0)
{
if (i == 0) return(num);
}
num+=i;
out+=i;
outl-=i;
}
}
/* else */
/* we are going to be doing some buffering */
if (i <= 0)
{
if (i == 0) return(num);
}
/* Lets re-read using ourselves :-) */
goto start;
}
{
int i,num=0;
/* add to buffer and return */
if (i >= inl)
{
}
/* else */
/* stuff already in buffer, so add to it first, then flush */
{
if (i > 0) /* lets fill it up if we can */
{
in+=i;
inl-=i;
num+=i;
}
/* we now have a full buffer needing flushing */
for (;;)
{
if (i <= 0)
{
if (i == 0) return(num);
}
}
}
/* we only get here if the buffer has been flushed and we
* still have stuff to write */
/* we now have inl bytes to write */
{
if (i <= 0)
{
if (i == 0) return(num);
}
num+=i;
in+=i;
inl-=i;
}
/* copy the rest into the buffer since we have only a small
* amount left */
goto start;
}
{
long ret=1;
int r,i,*ip;
switch (cmd)
{
case BIO_CTRL_RESET:
break;
case BIO_CTRL_INFO:
break;
case BIO_C_GET_BUFF_NUM_LINES:
ret=0;
{
}
break;
case BIO_CTRL_WPENDING:
if (ret == 0)
{
}
break;
case BIO_CTRL_PENDING:
if (ret == 0)
{
}
break;
case BIO_C_SET_BUFF_READ_DATA:
{
}
ret=1;
break;
case BIO_C_SET_BUFF_SIZE:
{
if (*ip == 0)
{
}
else /* if (*ip == 1) */
{
}
}
else
{
}
{
}
{
{
goto malloc_error;
}
}
{
}
{
}
break;
case BIO_C_DO_STATE_MACHINE:
break;
case BIO_CTRL_FLUSH:
{
break;
}
for (;;)
{
{
#if 0
#endif
if (r <= 0) return((long)r);
}
else
{
ret=1;
break;
}
}
break;
case BIO_CTRL_DUP:
ret=0;
break;
default:
break;
}
return(ret);
return(0);
}
{
long ret=1;
switch (cmd)
{
default:
break;
}
return(ret);
}
{
char *p;
size--; /* reserve space for a '\0' */
for (;;)
{
{
flag=0;
{
*(buf++)=p[i];
if (p[i] == '\n')
{
flag=1;
i++;
break;
}
}
num+=i;
size-=i;
{
*buf='\0';
return(num);
}
}
else /* read another chunk */
{
if (i <= 0)
{
*buf='\0';
if (i == 0) return(num);
}
}
}
}
{
}