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Diffstat (limited to 'hicn-light/src/config/commandOps.h')
-rwxr-xr-x | hicn-light/src/config/commandOps.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/hicn-light/src/config/commandOps.h b/hicn-light/src/config/commandOps.h new file mode 100755 index 000000000..6428a3ebf --- /dev/null +++ b/hicn-light/src/config/commandOps.h @@ -0,0 +1,126 @@ +/* + * Copyright (c) 2017-2019 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 command_Ops.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 command_Ops_h +#define command_Ops_h + +#include <parc/algol/parc_List.h> + +#include <src/config/commandReturn.h> + +// forward reference +struct command_parser; + +struct command_ops; +typedef struct command_ops CommandOps; + +/** + * @typedef CommandOps + * @abstract Each command implements a CommandOps + * @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 CommandOps control_Root = { + * .closure = NULL, + * .command = "", // empty string for root + * .init = control_Root_Init, + * .execute = control_Root_Execute + * .destroyer = NULL + * }; + * @endcode + * + * The control_Root_Init function will then begin adding the subtree under root. + * For example: + * + * @code + * const CommandOps control_Add = { + * .closure = NULL, + * .command = "add", + * .init = control_Add_Init, + * .execute = control_Add_Execute, + * .destroyer = NULL + * }; + * + * static void + * control_Root_Init(ControlState *state, CommandOps *ops) + * { + * controlState_RegisterCommand(state, &control_Add); + * } + * @endcode + */ +struct command_ops { + void *closure; + char *command; + void (*init)(struct command_parser *parser, CommandOps *ops); + CommandReturn (*execute)(struct command_parser *parser, CommandOps *ops, + PARCList *args); + void (*destroyer)(CommandOps **opsPtr); +}; + +/** + * A helper function to create the pubically defined CommandOps. + * + * Retruns allocated memory of the command + * + * @param [in] command The string is copied + * + * @retval <#value#> <#explanation#> + * + * Example: + * @code + * <#example#> + * @endcode + */ +CommandOps *commandOps_Create( + void *closure, const char *command, + void (*init)(struct command_parser *parser, CommandOps *ops), + CommandReturn (*execute)(struct command_parser *parser, CommandOps *ops, + PARCList *args), + void (*destroyer)(CommandOps **opsPtr)); + +/** + * De-allocates the memory of the CommandOps and the copied command string + * + * <#Paragraphs Of Explanation#> + * + * @param [<#in out in,out#>] <#name#> <#description#> + * + * @retval <#value#> <#explanation#> + * + * Example: + * @code + * <#example#> + * @endcode + */ +void commandOps_Destroy(CommandOps **opsPtr); +#endif // command_Ops_h |