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85 lines
1.6 KiB
C
85 lines
1.6 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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/*
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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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/*
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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 expand_line = ( 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( expand_line && allocated < 0 && max_line < INT_MAX / 2 );
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/* Bail if the result won't fit in MAXLINE */
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/* We don't free targets/sources/shell if bailing. */
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if( allocated < 0 )
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{
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cmd_free( cmd );
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cmd = 0;
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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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