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/*
* Copyright 1994 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/*
* command.h - the CMD structure and routines to manipulate them
*
* Both ACTION and CMD contain a rule, targets, and sources. An
* ACTION describes a rule to be applied to the given targets and
* sources; a CMD is what actually gets executed by the shell. The
* differences are due to:
*
* ACTIONS must be combined if 'actions together' is given.
* ACTIONS must be split if 'actions piecemeal' is given.
* ACTIONS must have current sources omitted for 'actions updated'.
*
* The CMD datatype holds a single command that is to be executed
* against a target, and they can chain together to represent the
* full collection of commands used to update a target.
*
* Structures:
*
* CMD - an action, ready to be formatted into a buffer and executed.
*
* External routines:
*
* cmd_new() - return a new CMD or 0 if too many args.
* cmd_free() - delete CMD and its parts.
* cmd_next() - walk the CMD chain.
*/
/*
* CMD - an action, ready to be formatted into a buffer and executed.
*/
typedef struct _cmd CMD;
struct _cmd
{
CMD * next;
CMD * tail; /* valid on in head */
RULE * rule; /* rule->actions contains shell script */
LIST * shell; /* $(SHELL) value */
LOL args; /* LISTs for $(<), $(>) */
char * buf; /* actual commands */
};
CMD * cmd_new
(
RULE * rule, /* rule (referenced) */
LIST * targets, /* $(<) (freed) */
LIST * sources, /* $(>) (freed) */
LIST * shell /* $(SHELL) (freed) */
);
void cmd_free( CMD * );
#define cmd_next( c ) ( ( c )->next )
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