/* * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved. * * The contents of this file constitute Original Code as defined in and are * subject to the Apple Public Source License Version 1.2 (the 'License'). * You may not use this file except in compliance with the License. Please obtain * a copy of the License at http://www.apple.com/publicsource and read it before * using this file. * * This Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the * specific language governing rights and limitations under the License. */ /* * str_stk.h - maintains a stack of the components of a bit string * or octet string so they can be copied into a single chunk * * * CONSTRUCTED BIT AND OCTET STRINGS SUCK. They should be * specified in the application's ASN.1 spec as SEQUENCE OF OCTET STRING * * this stack stuff is for decoding constructed bit/octet strings * so the user gets a single contiguous bit/octet str instead of * irritating little pieces. This does not cost a lot more than * a linked octet/bit string type since we're copying from the * buffer anyway, not referencing it directly (even in simple case). * It will cost more if the string stk overflows and * needs to be enlarged via realloc - set the values of * initialStkSizeG, and stkGrowSize carefully for your application. * Once the StkSize grows, it doesn't shrink back ever. * * Only three routine use/deal with this stack garbage * BDecConsAsnOcts * BDecConsAsnBits * SetupConsBitsOctsStringStk * * Copyright (C) 1992 Michael Sample and the University of British Columbia * * This library is free software; you can redistribute it and/or * modify it provided that this copyright/license information is retained * in original form. * * If you modify this file, you must clearly indicate your changes. * * This source code 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. * * $Header: /cvs/Darwin/Security/SecuritySNACCRuntime/c-lib/inc/str-stk.h,v 1.1.1.1 2001/05/18 23:14:08 mb Exp $ * $Log: str-stk.h,v $ * Revision 1.1.1.1 2001/05/18 23:14:08 mb * Move from private repository to open source repository * * Revision 1.2 2001/05/05 00:59:23 rmurphy * Adding darwin license headers * * Revision 1.1.1.1 1999/03/16 18:06:22 aram * Originals from SMIME Free Library. * * Revision 1.2 1995/07/24 21:01:24 rj * changed `_' to `-' in file names. * * Revision 1.1 1994/08/28 09:45:41 rj * first check-in. for a list of changes to the snacc-1.1 distribution please refer to the ChangeLog. * */ typedef struct StrStkElmt { char *str; unsigned long int len; } StrStkElmt; typedef struct StrStk { StrStkElmt *stk; /* ptr to array of SSElmts with 'size' elmts */ unsigned long int initialNumElmts; unsigned long int numElmts; /* total # of elements in str stk */ unsigned long int growElmts; /* # elmts to increase size by when nec */ unsigned long int nextFreeElmt; /* index of next free element */ unsigned long int totalByteLen; /* octet len of string stored in stk */ } StrStk; extern StrStk strStkG; /* * initializes stk (Allocates if nec.) * once stk is enlarged, it doesn't shrink */ #define RESET_STR_STK()\ {\ strStkG.nextFreeElmt = 0;\ strStkG.totalByteLen = 0;\ if (strStkG.stk == NULL){\ strStkG.stk = (StrStkElmt*) malloc ((strStkG.initialNumElmts) *sizeof (StrStkElmt));\ strStkG.numElmts = strStkG.initialNumElmts;}\ } /* * add a char*,len pair to top of stack. * grows stack if necessary using realloc (!) */ #define PUSH_STR(strPtr, strsLen, env)\ {\ if (strStkG.nextFreeElmt >= strStkG.numElmts)\ {\ strStkG.stk = (StrStkElmt*) realloc (strStkG.stk, (strStkG.numElmts + strStkG.growElmts) *sizeof (StrStkElmt));\ strStkG.numElmts += strStkG.growElmts;\ }\ strStkG.totalByteLen += strsLen;\ strStkG.stk[strStkG.nextFreeElmt].str = strPtr;\ strStkG.stk[strStkG.nextFreeElmt].len = strsLen;\ strStkG.nextFreeElmt++;\ } /* * Set up size values for the stack that is used for merging constructed * octet or bit string into single strings. * **** Call this before decoding anything. ***** * Note: you don't have to call this if the default values * for initialStkSizeG and stkGrowSizeG are acceptable */ #define SetupConsBitsOctsStringStk (initialNumberOfElmts, numberOfElmtsToGrowBy)\ {\ strStkG.initialNumElmts = initialNumberOfElmts; \ strStkG.growElmts = numberOfElmtsToGrowBy;\ }