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