Delete bundled copy of NSS and replace with README.

nss/lib/libpkix/include/pkix_util.h

Index: nss/lib/libpkix/include/pkix_util.h
diff --git a/nss/lib/libpkix/include/pkix_util.h b/nss/lib/libpkix/include/pkix_util.h
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-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-/*
- * These functions provide support for a number of other functions
- * by creating and manipulating data structures used by those functions.
- *
- */
-
-#ifndef _PKIX_UTIL_H
-#define _PKIX_UTIL_H
-
-#include "pkixt.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* General
- *
- * Please refer to the libpkix Programmer's Guide for detailed information
- * about how to use the libpkix library. Certain key warnings and notices from
- * that document are repeated here for emphasis.
- *
- * All identifiers in this file (and all public identifiers defined in
- * libpkix) begin with "PKIX_". Private identifiers only intended for use
- * within the library begin with "pkix_".
- *
- * A function returns NULL upon success, and a PKIX_Error pointer upon failure.
- *
- * Unless otherwise noted, for all accessor (gettor) functions that return a
- * PKIX_PL_Object pointer, callers should assume that this pointer refers to a
- * shared object. Therefore, the caller should treat this shared object as
- * read-only and should not modify this shared object. When done using the
- * shared object, the caller should release the reference to the object by
- * using the PKIX_PL_Object_DecRef function.
- *
- * While a function is executing, if its arguments (or anything referred to by
- * its arguments) are modified, free'd, or destroyed, the function's behavior
- * is undefined.
- *
- */
-
-/* PKIX_Logger
- *
- * PKIX_Loggers provide a standard way for the caller to insert custom logging
- * facilities. These are used by libpkix to log errors, debug information,
- * status, etc. The LogCallback allows custom logging to take place.
- * Additionally, a Logger can be initialized with a loggerContext, which is
- * where the caller can specify configuration data such as the name of a
- * logfile or database. Note that this loggerContext must be a PKIX_PL_Object,
- * allowing it to be reference-counted and allowing it to provide the standard
- * PKIX_PL_Object functions (Equals, Hashcode, ToString, Compare, Duplicate).
- *
- * Once the caller has created the Logger object(s) (and set the loggerContext
- * (if any) and the Log callback), the caller then registers these Loggers
- * with the system by calling PKIX_SetLoggers or PKIX_AddLogger. All log
- * entries will then be logged using the specified Loggers. If multiple
- * Loggers are specified, every log entry will be logged with each of them.
- *
- * XXX Maybe give some guidance somewhere on how much detail each logging
- * level should have and where component boundaries should be. Maybe in
- * Implementor's Guide or Programmer's Guide.
- */
-
-#define PKIX_LOGGER_LEVEL_TRACE                5
-#define PKIX_LOGGER_LEVEL_DEBUG                4
-#define PKIX_LOGGER_LEVEL_WARNING              3
-#define PKIX_LOGGER_LEVEL_ERROR                2
-#define PKIX_LOGGER_LEVEL_FATALERROR           1
-
-#define PKIX_LOGGER_LEVEL_MAX                  5
-
-/*
- * FUNCTION: PKIX_Logger_LogCallback
- * DESCRIPTION:
- *
- *  This callback function logs a log entry containing the String pointed to
- *  by "message", the integer value of logLevel, and the String pointed to by
- *  "logComponent". A log entry can be associated with a particular log
- *  level (i.e. level 3) and a particular log component (i.e. "CertStore").
- *  For example, someone reading the log may only be interested in very general
- *  log entries so they look only for log level 1. Similarly, they may only be
- *  interested in log entries pertaining to the CertStore component so they
- *  look only for that log component. This function can be used before calling
- *  PKIX_Initialize.
- *
- * PARAMETERS:
- *  "logger"
- *      Address of logger whose LogCallback is to be used. Must be non-NULL.
- *  "message"
- *      Address of String that is to be logged used "logger". Must be non-NULL.
- *  "logLevel"
- *      Integer value representing the log level for this entry. The higher the
- *      level, the more detail. Must be non-NULL.
- *  "logComponent"
- *      PKIXERRORNUM value (defined in pkixt.h) designating the log component
- *      for this entry.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe
- *
- *  Multiple threads must be able to safely call this function without
- *  worrying about conflicts, even if they're operating on the same objects.
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-typedef PKIX_Error *
-(*PKIX_Logger_LogCallback)(
-        PKIX_Logger *logger,
-        PKIX_PL_String *message,
-        PKIX_UInt32 logLevel,
-        PKIX_ERRORCLASS logComponent,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_Create
- * DESCRIPTION:
- *
- *  Creates a new Logger using the Object pointed to by "loggerContext"
- *  (if any) and stores it at "pLogger". The new Logger uses the LogCallback
- *  pointed to by "callback". The Logger's maximum logging level is initially
- *  set to a very high level and its logging component is set to NULL (all
- *  components).
- *
- * PARAMETERS:
- *  "callback"
- *      The LogCallback function to be used. Must be non-NULL.
- *  "loggerContext"
- *      Address of Object representing the Logger's context (if any).
- *  "pLogger"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_Create(
-        PKIX_Logger_LogCallback callback,
-        PKIX_PL_Object *loggerContext,
-        PKIX_Logger **pLogger,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_GetLogCallback
- * DESCRIPTION:
- *
- *  Retrieves a pointer to "logger's" Log callback function and puts it in
- *  "pCallback".
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose Log callback is desired. Must be non-NULL.
- *  "pCallback"
- *      Address where Log callback function pointer will be stored.
- *      Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_GetLogCallback(
-        PKIX_Logger *logger,
-        PKIX_Logger_LogCallback *pCallback,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_GetLoggerContext
- * DESCRIPTION:
- *
- *  Retrieves a pointer to a PKIX_PL_Object representing the context (if any)
- *  of the Logger pointed to by "logger" and stores it at "pLoggerContext".
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose context is to be stored. Must be non-NULL.
- *  "pLoggerContext"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_GetLoggerContext(
-        PKIX_Logger *logger,
-        PKIX_PL_Object **pLoggerContext,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_GetMaxLoggingLevel
- * DESCRIPTION:
- *
- *  Retrieves a pointer to a PKIX_UInt32 representing the maximum logging
- *  level of the Logger pointed to by "logger" and stores it at "pLevel". Only
- *  log entries whose log level is less than or equal to this maximum logging
- *  level will be logged.
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose maximum logging level is to be stored.
- *      Must be non-NULL.
- *  "pLevel"
- *      Address where PKIX_UInt32 will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_GetMaxLoggingLevel(
-        PKIX_Logger *logger,
-        PKIX_UInt32 *pLevel,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_SetMaxLoggingLevel
- * DESCRIPTION:
- *
- *  Sets the maximum logging level of the Logger pointed to by "logger" with
- *  the integer value of "level".
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose maximum logging level is to be set.
- *      Must be non-NULL.
- *  "level"
- *      Maximum logging level to be set
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "logger"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_SetMaxLoggingLevel(
-        PKIX_Logger *logger,
-        PKIX_UInt32 level,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_GetLoggingComponent
- * DESCRIPTION:
- *
- *  Retrieves a pointer to a String representing the logging component of the
- *  Logger pointed to by "logger" and stores it at "pComponent". Only log
- *  entries whose log component matches the specified logging component will
- *  be logged.
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose logging component is to be stored.
- *      Must be non-NULL.
- *  "pComponent"
- *      Address where PKIXERRORNUM will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_GetLoggingComponent(
-        PKIX_Logger *logger,
-        PKIX_ERRORCLASS *pComponent,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Logger_SetLoggingComponent
- * DESCRIPTION:
- *
- *  Sets the logging component of the Logger pointed to by "logger" with the
- *  PKIXERRORNUM pointed to by "component". To match a small set of components,
- *  create a Logger for each.
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger whose logging component is to be set.
- *      Must be non-NULL.
- *  "component"
- *      PKIXERRORNUM value representing logging component to be set.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "logger"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Logger_SetLoggingComponent(
-        PKIX_Logger *logger,
-        PKIX_ERRORCLASS component,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_GetLoggers
- * DESCRIPTION:
- *
- *  Retrieves a pointer to the List of Loggers (if any) being used for logging
- *  by libpkix and stores it at "pLoggers". If no loggers are being used, this
- *  function stores an empty List at "pLoggers".
- *
- *  Note that the List returned by this function is immutable.
- *
- * PARAMETERS:
- *  "pLoggers"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_GetLoggers(
-        PKIX_List **pLoggers,  /* list of PKIX_Logger */
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_SetLoggers
- * DESCRIPTION:
- *
- *  Sets the Loggers to be used by libpkix to the List of Loggers pointed to
- *  by "loggers". If "loggers" is NULL, no Loggers will be used.
- *
- * PARAMETERS:
- *  "loggers"
- *      Address of List of Loggers to be set. NULL for no Loggers.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_SetLoggers(
-        PKIX_List *loggers,  /* list of PKIX_Logger */
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_AddLogger
- * DESCRIPTION:
- *
- *  Adds the Logger pointed to by "logger" to the List of Loggers used by
- *  libpkix.
- *
- * PARAMETERS:
- *  "logger"
- *      Address of Logger to be added. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Logger Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_AddLogger(
-        PKIX_Logger *logger,
-        void *plContext);
-
-/* Functions pertaining to the PKIX_Error type */
-
-/* Error
- *
- * An Error object is returned by a function upon encountering some error
- * condition. Each Error is associated with an errorCode specified in pkixt.h.
- * The remaining components of an Error are optional. An Error's description
- * specifies a text message describing the Error. An Error's supplementary info
- * specifies additional information that might be useful. Finally, an Error's
- * cause specifies the underlying Error (if any) that resulted in this Error
- * being returned, thereby allowing Errors to be chained so that an entire
- * "error stack trace" can be represented. Once created, an Error is immutable.
- *
- * Note that the Error's supplementary info must be an Object (although any
- * object type), allowing it to be reference-counted and allowing it to
- * provide the standard Object functions (Equals, Hashcode, ToString, Compare,
- * Duplicate).
- *
- * Errors are classified as either being fatal or non-fatal. If a function
- * fails in an unrecoverable way, it returns an Error whose errorCode is
- * PKIX_FATAL_ERROR. If such an error is encountered, the caller should
- * not attempt to recover since something seriously wrong has happened
- * (e.g. corrupted memory, memory finished, etc.). All other errorCodes
- * are considered non-fatal errors and can be handled by the caller as they
- * see fit.
- */
-
-/*
- * FUNCTION: PKIX_Error_Create
- * DESCRIPTION:
- *
- *  Creates a new Error using the value of "errorCode", the Error pointed to by
- *  "cause" (if any), the Object pointed to by "info" (if any), and the String
- *  pointed to by "desc" and stores it at "pError". If any error occurs during
- *  error allocation, it will be returned without chaining, since new errors
- *  cannot be created. Once created, an Error is immutable.
- *
- * PARAMETERS:
- *  "errorCode"
- *      Value of error code.
- *  "cause"
- *      Address of Error representing error's cause.
- *      NULL if none or unspecified.
- *  "info"
- *      Address of Object representing error's supplementary information.
- *      NULL if none.
- *  "desc"
- *      Address of String representing error's description. NULL if none.
- *  "pError"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_Create(
-        PKIX_ERRORCLASS errClass,
-        PKIX_Error *cause,
-        PKIX_PL_Object *info,
-        PKIX_ERRORCODE errCode,
-        PKIX_Error **pError,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Error_GetErrorClass
- * DESCRIPTION:
- *
- *  Retrieves the error class of the Error pointed to by "error" and 
- *  stores it at "pClass". Supported error codes are defined in pkixt.h.
- *
- * PARAMETERS:
- *  "error"
- *      Address of Error whose error code is desired. Must be non-NULL.
- *  "pClass"
- *      Address where PKIX_UInt32 will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_GetErrorClass(
-        PKIX_Error *error,
-        PKIX_ERRORCLASS *pClass,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Error_GetErrorCode
- * DESCRIPTION:
- *
- *  Retrieves the error code of the Error pointed to by "error" and 
- *  stores it at "pCode". Supported error codes are defined in pkixt.h.
- *
- * PARAMETERS:
- *  "error"
- *      Address of Error whose error code is desired. Must be non-NULL.
- *  "pCode"
- *      Address where PKIX_UInt32 will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_GetErrorCode(
-        PKIX_Error *error,
-        PKIX_ERRORCODE *pCode,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Error_GetCause
- * DESCRIPTION:
- *
- *  Retrieves the cause of the Error pointed to by "error" and stores it at
- *  "pCause". If no cause was specified, NULL will be stored at "pCause".
- *
- * PARAMETERS:
- *  "error"
- *      Address of Error whose cause is desired. Must be non-NULL.
- *  "pCause"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_GetCause(
-        PKIX_Error *error,
-        PKIX_Error **pCause,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Error_GetSupplementaryInfo
- * DESCRIPTION:
- *
- *  Retrieves the supplementary info of the Error pointed to by "error" and
- *  stores it at "pInfo".
- *
- * PARAMETERS:
- *  "error"
- *      Address of Error whose info is desired. Must be non-NULL.
- *  "pInfo"
- *      Address where info pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_GetSupplementaryInfo(
-        PKIX_Error *error,
-        PKIX_PL_Object **pInfo,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_Error_GetDescription
- * DESCRIPTION:
- *
- *  Retrieves the description of the Error pointed to by "error" and stores it
- *  at "pDesc". If no description was specified, NULL will be stored at
- *  "pDesc".
- *
- * PARAMETERS:
- *  "error"
- *      Address of Error whose description is desired. Must be non-NULL.
- *  "pDesc"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns an Error Error if the function fails in a non-fatal way.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_Error_GetDescription(
-        PKIX_Error *error,
-        PKIX_PL_String **pDesc,
-        void *plContext);
-
-/* PKIX_List
- *
- * Represents a collection of items. NULL is considered a valid item.
- */
-
-/*
- * FUNCTION: PKIX_List_Create
- * DESCRIPTION:
- *
- *  Creates a new List and stores it at "pList". The List is initially empty
- *  and holds no items. To initially add items to the List, use
- *  PKIX_List_AppendItem
- *
- * PARAMETERS:
- *  "pList"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_Create(
-        PKIX_List **pList,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_SetImmutable
- * DESCRIPTION:
- *
- *  Sets the List pointed to by "list" to be immutable. If a caller tries to
- *  change a List after it has been marked immutable (i.e. by calling
- *  PKIX_List_AppendItem, PKIX_List_InsertItem, PKIX_List_SetItem, or
- *  PKIX_List_DeleteItem), an Error is returned.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to be marked immutable. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "list"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_SetImmutable(
-        PKIX_List *list,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_IsImmutable
- * DESCRIPTION:
- *
- *  Checks whether the List pointed to by "list" is immutable and stores
- *  the Boolean result at "pImmutable". If a caller tries to change a List
- *  after it has been marked immutable (i.e. by calling PKIX_List_AppendItem,
- *  PKIX_List_InsertItem, PKIX_List_SetItem, or PKIX_List_DeleteItem), an
- *  Error is returned.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List whose immutability is to be determined.
- *      Must be non-NULL.
- *  "pImmutable"
- *      Address where PKIX_Boolean will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_IsImmutable(
-        PKIX_List *list,
-        PKIX_Boolean *pImmutable,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_GetLength
- * DESCRIPTION:
- *
- *  Retrieves the length of the List pointed to by "list" and stores it at
- *  "pLength".
- *
- * PARAMETERS:
- *  "list"
- *      Address of List whose length is desired. Must be non-NULL.
- *  "pLength"
- *      Address where PKIX_UInt32 will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_GetLength(
-        PKIX_List *list,
-        PKIX_UInt32 *pLength,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_IsEmpty
- * DESCRIPTION:
- *
- *  Checks whether the List pointed to by "list" is empty and stores
- *  the Boolean result at "pEmpty".
- *
- * PARAMETERS:
- *  "list"
- *      Address of List whose emptiness is to be determined. Must be non-NULL.
- *  "pEmpty"
- *      Address where PKIX_Boolean will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_IsEmpty(
-        PKIX_List *list,
-        PKIX_Boolean *pEmpty,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_AppendItem
- * DESCRIPTION:
- *
- *  Appends the Object pointed to by "item" after the last non-NULL item in
- *  List pointed to by "list", if any. Note that a List may validly contain
- *  NULL items. Appending "c" into the List ("a", NULL, "b", NULL) will result
- *  in ("a", NULL, "b", "c").
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to append to. Must be non-NULL.
- *  "item"
- *      Address of new item to append.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "list"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_AppendItem(
-        PKIX_List *list,
-        PKIX_PL_Object *item,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_InsertItem
- * DESCRIPTION:
- *
- *  Inserts the Object pointed to by "item" into the List pointed to by "list"
- *  at the given "index". The index counts from zero and must be less than the
- *  List's length. Existing list entries at or after this index will be moved
- *  to the next highest index.
- *
- *  XXX why not allow equal to length which would be equivalent to AppendItem?
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to insert into. Must be non-NULL.
- *  "index"
- *      Position to insert into. Must be less than List's length.
- *  "item"
- *      Address of new item to append.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "list"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_InsertItem(
-        PKIX_List *list,
-        PKIX_UInt32 index,
-        PKIX_PL_Object *item,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_GetItem
- * DESCRIPTION:
- *
- *  Copies the "list"'s item at "index" into "pItem". The index counts from
- *  zero and must be less than the list's length. Increments the reference
- *  count on the returned object, if non-NULL.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to get item from. Must be non-NULL.
- *  "index"
- *      Index of list to get item from. Must be less than List's length.
- *  "pItem"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_GetItem(
-        PKIX_List *list,
-        PKIX_UInt32 index,
-        PKIX_PL_Object **pItem,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_SetItem
- * DESCRIPTION:
- *
- *  Sets the item at "index" of the List pointed to by "list" with the Object
- *  pointed to by "item". The index counts from zero and must be less than the
- *  List's length. The previous entry at this index will have its reference
- *  count decremented and the new entry will have its reference count
- *  incremented.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to modify. Must be non-NULL.
- *  "index"
- *      Position in List to set. Must be less than List's length.
- *  "item"
- *      Address of Object to set at "index".
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "list"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_SetItem(
-        PKIX_List *list,
-        PKIX_UInt32 index,
-        PKIX_PL_Object *item,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_DeleteItem
- *
- *  Deletes the item at "index" from the List pointed to by "list". The index
- *  counts from zero and must be less than the List's length. Note that this
- *  function does not destroy the List. It simply decrements the reference
- *  count of the item at "index" in the List, deletes that item from the list
- *  and moves all subsequent entries to a lower index in the list. If there is
- *  only a single element in the List and that element is deleted, then the
- *  List will be empty.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List to delete from. Must be non-NULL.
- *  "index"
- *      Position in List to delete. Must be less than List's length.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Not Thread Safe - assumes exclusive access to "list"
- *  (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_DeleteItem(
-        PKIX_List *list,
-        PKIX_UInt32 index,
-        void *plContext);
-
-/*
- * FUNCTION: PKIX_List_ReverseList
- * DESCRIPTION:
- *
- *  Creates a new List whose elements are in the reverse order as the elements
- *  of the Object pointed to by "list" and stores the copy at "pReversedList".
- *  If "list" is empty, the new reversed List will be a copy of "list".
- *  Changes to the new object will not affect the original and vice versa.
- *
- * PARAMETERS:
- *  "list"
- *      Address of List whose elements are to be reversed. Must be non-NULL.
- *  "pReversedList"
- *      Address where object pointer will be stored. Must be non-NULL.
- *  "plContext"
- *      Platform-specific context pointer.
- * THREAD SAFETY:
- *  Conditionally Thread Safe
- *      (see Thread Safety Definitions in Programmer's Guide)
- * RETURNS:
- *  Returns NULL if the function succeeds.
- *  Returns a Fatal Error if the function fails in an unrecoverable way.
- */
-PKIX_Error *
-PKIX_List_ReverseList(
-        PKIX_List *list,
-        PKIX_List **pReversedList,
-        void *plContext);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _PKIX_UTIL_H */