diff options
Diffstat (limited to 'metis/ccnx/forwarder/metis/config/metis_CommandOps.h')
-rw-r--r-- | metis/ccnx/forwarder/metis/config/metis_CommandOps.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/metis/ccnx/forwarder/metis/config/metis_CommandOps.h b/metis/ccnx/forwarder/metis/config/metis_CommandOps.h new file mode 100644 index 00000000..e37024aa --- /dev/null +++ b/metis/ccnx/forwarder/metis/config/metis_CommandOps.h @@ -0,0 +1,121 @@ +/* + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * @file metis_CommandOps.h + * @brief The function structure defining a CLI command + * + * The function structure that defines a CLI command. Each command will return one + * of these which defines how to run the command. + * + */ + +#ifndef Metis_metis_CommandOps_h +#define Metis_metis_CommandOps_h + +#include <parc/algol/parc_List.h> + +#include <ccnx/forwarder/metis/config/metis_CommandReturn.h> + +// forward reference +struct metis_command_parser; + +struct metis_command_ops; +typedef struct metis_command_ops MetisCommandOps; + +/** + * @typedef MetisCommandOps + * @abstract Each command implements a MetisCommandOps + * @constant closure is a user-specified pointer for any state the user needs + * @constant command The text string of the command, must be the spelled out string, e.g. "help list routes" + * @constant init A function to call to initialize the command at program startup + * @constant execute A function to call to execute the command + * @constant destroyer A function to call to release the command + * @discussion + * Typically, the root of the thee has an Init function that then initilizes the + * rest of the tree. For example: + * + * @code + * const MetisCommandOps metisControl_Root = { + * .closure = NULL, + * .command = "", // empty string for root + * .init = metisControl_Root_Init, + * .execute = metisControl_Root_Execute + * .destroyer = NULL + * }; + * @endcode + * + * The metisControl_Root_Init function will then begin adding the subtree under root. For example: + * + * @code + * const MetisCommandOps metisControl_Add = { + * .closure = NULL, + * .command = "add", + * .init = metisControl_Add_Init, + * .execute = metisControl_Add_Execute, + * .destroyer = NULL + * }; + * + * static void + * metisControl_Root_Init(MetisControlState *state, MetisCommandOps *ops) + * { + * metisControlState_RegisterCommand(state, &metisControl_Add); + * } + * @endcode + */ +struct metis_command_ops { + void *closure; + char *command; + void (*init)(struct metis_command_parser *parser, MetisCommandOps *ops); + MetisCommandReturn (*execute)(struct metis_command_parser *parser, MetisCommandOps *ops, PARCList *args); + void (*destroyer)(MetisCommandOps **opsPtr); +}; + +/** + * A helper function to create the pubically defined MetisCommandOps. + * + * Retruns allocated memory of the command + * + * @param [in] command The string is copied + * + * @retval <#value#> <#explanation#> + * + * Example: + * @code + * <#example#> + * @endcode + */ +MetisCommandOps *metisCommandOps_Create(void *closure, + const char *command, + void (*init)(struct metis_command_parser *parser, MetisCommandOps *ops), + MetisCommandReturn (*execute)(struct metis_command_parser *parser, MetisCommandOps *ops, PARCList *args), + void (*destroyer)(MetisCommandOps **opsPtr)); + +/** + * De-allocates the memory of the MetisCommandOps and the copied command string + * + * <#Paragraphs Of Explanation#> + * + * @param [<#in out in,out#>] <#name#> <#description#> + * + * @retval <#value#> <#explanation#> + * + * Example: + * @code + * <#example#> + * @endcode + */ +void metisCommandOps_Destroy(MetisCommandOps **opsPtr); +#endif // Metis_metis_CommandOps_h |