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/*
* Copyright 1993, 1995 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/* This file is ALSO:
* (C) Copyright David Abrahams 2001. Permission to copy, use,
* modify, sell and distribute this software is granted provided this
* copyright notice appears in all copies. This software is provided
* "as is" without express or implied warranty, and with no claim as
* to its suitability for any purpose.
*/
/*
* command.c - maintain lists of commands
*/
# include "jam.h"
# include "lists.h"
# include "parse.h"
# include "variable.h"
# include "rules.h"
# include "command.h"
# include <limits.h>
/*
* cmd_new() - return a new CMD or 0 if too many args
*/
CMD *
cmd_new(
RULE *rule,
LIST *targets,
LIST *sources,
LIST *shell )
{
CMD *cmd = (CMD *)malloc( sizeof( CMD ) );
/* lift line-length limitation entirely when JAMSHELL is just "%" */
int expand_line = ( shell && !strcmp(shell->string,"%") && !list_next(shell) );
int max_line = MAXLINE;
int allocated = -1;
cmd->rule = rule;
cmd->shell = shell;
cmd->next = 0;
lol_init( &cmd->args );
lol_add( &cmd->args, targets );
lol_add( &cmd->args, sources );
cmd->buf = 0;
do
{
free(cmd->buf); /* free any buffer from previous iteration */
cmd->buf = (char*)malloc(max_line + 1);
if (cmd->buf == 0)
break;
allocated = var_string( rule->actions->command, cmd->buf, max_line, &cmd->args );
max_line = max_line * 2;
}
while( expand_line && allocated < 0 && max_line < INT_MAX / 2 );
/* Bail if the result won't fit in MAXLINE */
/* We don't free targets/sources/shell if bailing. */
if( allocated < 0 )
{
cmd_free( cmd );
cmd = 0;
}
return cmd;
}
/*
* cmd_free() - free a CMD
*/
void
cmd_free( CMD *cmd )
{
lol_free( &cmd->args );
list_free( cmd->shell );
free( cmd->buf );
free( (char *)cmd );
}
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