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add command registration chaining

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Adds the ability to chain registration structures.  Modules can define a
command with the 'chain' and 'num_chain' fields defined in their
registration table, and the register_commands() function will initialize
these commands.  If the registration record creates a new command, then
the chained commands are created under it; otherwise, they are created
in the same context as the other commands (i.e. the parent argument).
This commit is contained in:
Zachary T Welch
2009-11-21 13:59:51 -08:00
parent 607634f967
commit 60ba4641d6
2 changed files with 37 additions and 8 deletions
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15
src/helper/command.h
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@@ -202,10 +202,18 @@ struct command_registration {
const char *help;
/// a string listing the options and arguments, required or optional
const char *usage;
/**
* If non-NULL, the commands in @c chain will be registered in
* the same context and scope of this registration record.
* This allows modules to inherit lists commands from other
* modules.
*/
const struct command_registration *chain;
};
/// Use this as the last entry in an array of command_registration records.
#define COMMAND_REGISTRATION_DONE { .name = NULL }
#define COMMAND_REGISTRATION_DONE { .name = NULL, .chain = NULL }
/**
* Register a command @c handler that can be called from scripts during
@@ -238,7 +246,10 @@ struct command* register_command(struct command_context *cmd_ctx,
/**
* Register one or more commands in the specified context, as children
* of @c parent (or top-level commends, if NULL).
* of @c parent (or top-level commends, if NULL). In a registration's
* record contains a non-NULL @c chain member and name is NULL, the
* commands on the chain will be registered in the same context.
* Otherwise, the chained commands are added as children of the command.
*
* @param cmd_ctx The command_context in which to register the command.
* @param parent Register this command as a child of this, or NULL to