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Diffstat (limited to 'security/nss/lib/base/error.c')
| -rw-r--r-- | security/nss/lib/base/error.c | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/security/nss/lib/base/error.c b/security/nss/lib/base/error.c deleted file mode 100644 index 470b8e3da..000000000 --- a/security/nss/lib/base/error.c +++ /dev/null @@ -1,287 +0,0 @@ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is the Netscape security libraries. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1994-2000 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -#ifdef DEBUG -static const char CVS_ID[] = "@(#) $RCSfile$ $Revision$ $Date$"; -#endif /* DEBUG */ - -/* - * error.c - * - * This file contains the code implementing the per-thread error - * stacks upon which most NSS routines report their errors. - */ - -#ifndef BASE_H -#include "base.h" -#endif /* BASE_H */ -#include <string.h> /* for memmove */ - -#define NSS_MAX_ERROR_STACK_COUNT 16 /* error codes */ - -/* - * The stack itself has a header, and a sequence of integers. - * The header records the amount of space (as measured in stack - * slots) already allocated for the stack, and the count of the - * number of records currently being used. - */ - -struct stack_header_str { - PRUint16 space; - PRUint16 count; -}; - -struct error_stack_str { - struct stack_header_str header; - PRInt32 stack[1]; -}; -typedef struct error_stack_str error_stack; - -/* - * error_stack_index - * - * Thread-private data must be indexed. This is that index. - * See PR_NewThreadPrivateIndex for more information. - */ - -static PRUintn error_stack_index; - -/* - * call_once - * - * The thread-private index must be obtained (once!) at runtime. - * This block is used for that one-time call. - */ - -static PRCallOnceType error_call_once; - -/* - * error_once_function - * - * This is the once-called callback. - */ -static PRStatus -error_once_function ( void) -{ - return nss_NewThreadPrivateIndex(&error_stack_index,PR_Free); - /* return PR_NewThreadPrivateIndex(&error_stack_index, PR_Free); */ -} - -/* - * error_get_my_stack - * - * This routine returns the calling thread's error stack, creating - * it if necessary. It may return NULL upon error, which implicitly - * means that it ran out of memory. - */ - -static error_stack * -error_get_my_stack ( void) -{ - PRStatus st; - error_stack *rv; - PRUintn new_size; - PRUint32 new_bytes; - error_stack *new_stack; - - if( 0 == error_stack_index ) { - st = PR_CallOnce(&error_call_once, error_once_function); - if( PR_SUCCESS != st ) { - return (error_stack *)NULL; - } - } - - rv = (error_stack *)nss_GetThreadPrivate(error_stack_index); - if( (error_stack *)NULL == rv ) { - /* Doesn't exist; create one */ - new_size = 16; - } else if( rv->header.count == rv->header.space && - rv->header.count < NSS_MAX_ERROR_STACK_COUNT ) { - /* Too small, expand it */ - new_size = PR_MIN( rv->header.space * 2, NSS_MAX_ERROR_STACK_COUNT); - } else { - /* Okay, return it */ - return rv; - } - - new_bytes = (new_size * sizeof(PRInt32)) + sizeof(error_stack); - /* Use NSPR's calloc/realloc, not NSS's, to avoid loops! */ - new_stack = PR_Calloc(1, new_bytes); - - if( (error_stack *)NULL != new_stack ) { - if( (error_stack *)NULL != rv ) { - (void)nsslibc_memcpy(new_stack,rv,rv->header.space); - } - new_stack->header.space = new_size; - } - - /* Set the value, whether or not the allocation worked */ - nss_SetThreadPrivate(error_stack_index, new_stack); - return new_stack; -} - -/* - * The error stack - * - * The public methods relating to the error stack are: - * - * NSS_GetError - * NSS_GetErrorStack - * - * The nonpublic methods relating to the error stack are: - * - * nss_SetError - * nss_ClearErrorStack - * - */ - -/* - * NSS_GetError - * - * This routine returns the highest-level (most general) error set - * by the most recent NSS library routine called by the same thread - * calling this routine. - * - * This routine cannot fail. However, it may return zero, which - * indicates that the previous NSS library call did not set an error. - * - * Return value: - * 0 if no error has been set - * A nonzero error number - */ - -NSS_IMPLEMENT PRInt32 -NSS_GetError ( void) -{ - error_stack *es = error_get_my_stack(); - - if( (error_stack *)NULL == es ) { - return NSS_ERROR_NO_MEMORY; /* Good guess! */ - } - - if( 0 == es->header.count ) { - return 0; - } - - return es->stack[ es->header.count-1 ]; -} - -/* - * NSS_GetErrorStack - * - * This routine returns a pointer to an array of integers, containing - * the entire sequence or "stack" of errors set by the most recent NSS - * library routine called by the same thread calling this routine. - * NOTE: the caller DOES NOT OWN the memory pointed to by the return - * value. The pointer will remain valid until the calling thread - * calls another NSS routine. The lowest-level (most specific) error - * is first in the array, and the highest-level is last. The array is - * zero-terminated. This routine may return NULL upon error; this - * indicates a low-memory situation. - * - * Return value: - * NULL upon error, which is an implied NSS_ERROR_NO_MEMORY - * A NON-caller-owned pointer to an array of integers - */ - -NSS_IMPLEMENT PRInt32 * -NSS_GetErrorStack ( void) -{ - error_stack *es = error_get_my_stack(); - - if( (error_stack *)NULL == es ) { - return (PRInt32 *)NULL; - } - - /* Make sure it's terminated */ - es->stack[ es->header.count ] = 0; - - return es->stack; -} - -/* - * nss_SetError - * - * This routine places a new error code on the top of the calling - * thread's error stack. Calling this routine wiht an error code - * of zero will clear the error stack. - */ - -NSS_IMPLEMENT void -nss_SetError ( PRUint32 error) -{ - error_stack *es; - - if( 0 == error ) { - nss_ClearErrorStack(); - return; - } - - es = error_get_my_stack(); - if( (error_stack *)NULL == es ) { - /* Oh, well. */ - return; - } - - if (es->header.count < es->header.space) { - es->stack[ es->header.count++ ] = error; - } else { - memmove(es->stack, es->stack + 1, - (es->header.space - 1) * (sizeof es->stack[0])); - es->stack[ es->header.space - 1 ] = error; - } - return; -} - -/* - * nss_ClearErrorStack - * - * This routine clears the calling thread's error stack. - */ - -NSS_IMPLEMENT void -nss_ClearErrorStack ( void) -{ - error_stack *es = error_get_my_stack(); - if( (error_stack *)NULL == es ) { - /* Oh, well. */ - return; - } - - es->header.count = 0; - es->stack[0] = 0; - return; -} |