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/* crypto/buffer/buffer.c */
/* 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
* documentation and/or other materials provided with the distribution.
* 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 "cryptlib.h"
#include "buffer.h"
BUF_MEM *BUF_MEM_new()
{
BUF_MEM *ret;
ret=(BUF_MEM *)Malloc(sizeof(BUF_MEM));
if (ret == NULL)
{
BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE);
return(NULL);
}
ret->length=0;
ret->max=0;
ret->data=NULL;
return(ret);
}
void BUF_MEM_free(a)
BUF_MEM *a;
{
if (a->data != NULL)
{
memset(a->data,0,(unsigned int)a->max);
Free(a->data);
}
Free(a);
}
int BUF_MEM_grow(str, len)
BUF_MEM *str;
int len;
{
char *ret;
unsigned int n;
if (str->length >= len)
{
str->length=len;
return(len);
}
if (str->max >= len)
{
memset(&(str->data[str->length]),0,len-str->length);
str->length=len;
return(len);
}
n=(len+3)/3*4;
if (str->data == NULL)
ret=(char *)Malloc(n);
else
ret=(char *)Realloc(str->data,n);
if (ret == NULL)
{
BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
len=0;
}
else
{
str->data=ret;
str->length=len;
str->max=n;
}
return(len);
}
char *BUF_strdup(str)
char *str;
{
char *ret;
int n;
if (str == NULL) return(NULL);
n=strlen(str);
ret=Malloc(n+1);
if (ret == NULL)
{
BUFerr(BUF_F_BUF_STRDUP,ERR_R_MALLOC_FAILURE);
return(NULL);
}
memcpy(ret,str,n+1);
return(ret);
}
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