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-rw-r--r--jam-files/engine/command.c100
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diff --git a/jam-files/engine/command.c b/jam-files/engine/command.c
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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 );
+}