/* * 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, /* $( LIST *sources, /* $(>) (freed) */ LIST *shell ); /* $(SHELL) (freed) */ void cmd_free( CMD *cmd ); # define cmd_next( c ) ((c)->next)
