| /*------------------------------------------------------------------ |
| * safe_str_constraint.c |
| * |
| * October 2008, Bo Berry |
| * 2012, Jonathan Toppins <jtoppins@users.sourceforge.net> |
| * |
| * Copyright (c) 2008, 2009, 2012 Cisco Systems |
| * All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, |
| * copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following |
| * conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| *------------------------------------------------------------------ |
| */ |
| |
| #include "safeclib_private.h" |
| #include "safe_str_constraint.h" |
| #include "safe_str_lib.h" |
| |
| |
| static constraint_handler_t str_handler = NULL; |
| |
| |
| /** |
| * NAME |
| * set_str_constraint_handler_s |
| * |
| * SYNOPSIS |
| * #include "safe_str_lib.h" |
| * constraint_handler_t |
| * set_str_constraint_handler_s(constraint_handler_t handler) |
| * |
| * DESCRIPTION |
| * The set_str_constraint_handler_s function sets the runtime-constraint |
| * handler to be handler. The runtime-constraint handler is the function to |
| * be called when a library function detects a runtime-constraint |
| * violation. Only the most recent handler registered with |
| * set_str_constraint_handler_s is called when a runtime-constraint |
| * violation occurs. |
| * When the handler is called, it is passed the following arguments in |
| * the following order: |
| * 1. A pointer to a character string describing the |
| * runtime-constraint violation. |
| * 2. A null pointer or a pointer to an implementation defined |
| * object. |
| * 3. If the function calling the handler has a return type declared |
| * as errno_t, the return value of the function is passed. |
| * Otherwise, a positive value of type errno_t is passed. |
| * The implementation has a default constraint handler that is used if no |
| * calls to the set_constraint_handler_s function have been made. The |
| * behavior of the default handler is implementation-defined, and it may |
| * cause the program to exit or abort. If the handler argument to |
| * set_constraint_handler_s is a null pointer, the implementation default |
| * handler becomes the current constraint handler. |
| * |
| * SPECIFIED IN |
| * ISO/IEC JTC1 SC22 WG14 N1172, Programming languages, environments |
| * and system software interfaces, Extensions to the C Library, |
| * Part I: Bounds-checking interfaces |
| * |
| * INPUT PARAMETERS |
| * *msg Pointer to the message describing the error |
| * |
| * *ptr Pointer to aassociated data. Can be NULL. |
| * |
| * error The error code encountered. |
| * |
| * OUTPUT PARAMETERS |
| * none |
| * |
| * RETURN VALUE |
| * none |
| * |
| * ALSO SEE |
| * set_str_constraint_handler_s() |
| */ |
| constraint_handler_t |
| set_str_constraint_handler_s (constraint_handler_t handler) |
| { |
| constraint_handler_t prev_handler = str_handler; |
| if (NULL == handler) { |
| str_handler = sl_default_handler; |
| } else { |
| str_handler = handler; |
| } |
| return prev_handler; |
| } |
| EXPORT_SYMBOL(set_str_constraint_handler_s); |
| |
| |
| /** |
| * NAME |
| * invoke_safe_str_constraint_handler |
| * |
| * SYNOPSIS |
| * #include "safe_str_constraint.h" |
| * void |
| * invoke_safe_str_constraint_handler (const char *msg, |
| * void *ptr, |
| * errno_t error) |
| * |
| * DESCRIPTION |
| * Invokes the currently set constraint handler or the default. |
| * |
| * INPUT PARAMETERS |
| * *msg Pointer to the message describing the error |
| * |
| * *ptr Pointer to aassociated data. Can be NULL. |
| * |
| * error The error code encountered. |
| * |
| * OUTPUT PARAMETERS |
| * none |
| * |
| * RETURN VALUE |
| * none |
| * |
| */ |
| void |
| invoke_safe_str_constraint_handler (const char *msg, |
| void *ptr, |
| errno_t error) |
| { |
| if (NULL != str_handler) { |
| str_handler(msg, ptr, error); |
| } else { |
| sl_default_handler(msg, ptr, error); |
| } |
| } |