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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:
* Copyright 2001-2004 David Abrahams.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
*/
/*
* 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>
#include <string.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 *)BJAM_MALLOC( sizeof( CMD ) );
/* Lift line-length limitation entirely when JAMSHELL is just "%". */
int no_limit = ( 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
{
BJAM_FREE( cmd->buf ); /* free any buffer from previous iteration */
cmd->buf = (char*)BJAM_MALLOC_ATOMIC( 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 ( ( allocated < 0 ) && ( max_line < INT_MAX / 2 ) );
if ( !no_limit )
{
/* Bail if the result will not fit in MAXLINE. */
char * s = cmd->buf;
while ( *s )
{
size_t l = strcspn( s, "\n" );
if ( l > MAXLINE )
{
/* We do not free targets/sources/shell if bailing. */
cmd_free( cmd );
return 0;
}
s += l;
if ( *s )
++s;
}
}
return cmd;
}
/*
* cmd_free() - free a CMD
*/
void cmd_free( CMD * cmd )
{
lol_free( &cmd->args );
list_free( cmd->shell );
BJAM_FREE( cmd->buf );
BJAM_FREE( (char *)cmd );
}
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