mirror of
https://github.com/boostorg/build.git
synced 2026-02-15 13:02:11 +00:00
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
|
|
* 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(object_str(shell->value),"%") && !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( object_str( 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 );
|
|
}
|