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