home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Languguage OS 2
/
Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO
/
gnu
/
bash_114.zip
/
bash-1.14.2
/
copy_cmd.c
< prev
next >
Wrap
C/C++ Source or Header
|
1994-05-05
|
8KB
|
306 lines
/* copy_command.c -- copy a COMMAND structure. This is needed
primarily for making function definitions, but I'm not sure
that anyone else will need it. */
/* Copyright (C) 1987,1991 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
Bash is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with Bash; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#if defined (HAVE_STRING_H)
# include <string.h>
#else /* !HAVE_STRING_H */
# include <strings.h>
#endif /* !HAVE_STRING_H */
#include "shell.h"
WORD_DESC *
copy_word (word)
WORD_DESC *word;
{
WORD_DESC *new_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC));
FASTCOPY ((char *)word, (char *)new_word, sizeof (WORD_DESC));
new_word->word = savestring (word->word);
return (new_word);
}
/* Copy the chain of words in LIST. Return a pointer to
the new chain. */
WORD_LIST *
copy_word_list (list)
WORD_LIST *list;
{
WORD_LIST *new_list = NULL;
while (list)
{
WORD_LIST *temp = (WORD_LIST *)xmalloc (sizeof (WORD_LIST));
temp->next = new_list;
new_list = temp;
new_list->word = copy_word (list->word);
list = list->next;
}
return (REVERSE_LIST (new_list, WORD_LIST *));
}
static PATTERN_LIST *
copy_case_clause (clause)
PATTERN_LIST *clause;
{
PATTERN_LIST *new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST));
new_clause->patterns = copy_word_list (clause->patterns);
new_clause->action = copy_command (clause->action);
return (new_clause);
}
static PATTERN_LIST *
copy_case_clauses (clauses)
PATTERN_LIST *clauses;
{
PATTERN_LIST *new_list = (PATTERN_LIST *)NULL;
while (clauses)
{
PATTERN_LIST *new_clause = copy_case_clause (clauses);
new_clause->next = new_list;
new_list = new_clause;
clauses = clauses->next;
}
return (REVERSE_LIST (new_list, PATTERN_LIST *));
}
/* Copy a single redirect. */
REDIRECT *
copy_redirect (redirect)
REDIRECT *redirect;
{
REDIRECT *new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT));
FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT)));
switch (redirect->instruction)
{
case r_reading_until:
case r_deblank_reading_until:
new_redirect->here_doc_eof = savestring (redirect->here_doc_eof);
/* There is NO BREAK HERE ON PURPOSE!!!! */
case r_appending_to:
case r_output_direction:
case r_input_direction:
case r_inputa_direction:
case r_err_and_out:
case r_input_output:
case r_output_force:
case r_duplicating_input_word:
case r_duplicating_output_word:
new_redirect->redirectee.filename =
copy_word (redirect->redirectee.filename);
break;
}
return (new_redirect);
}
REDIRECT *
copy_redirects (list)
REDIRECT *list;
{
REDIRECT *new_list = NULL;
while (list)
{
REDIRECT *temp = copy_redirect (list);
temp->next = new_list;
new_list = temp;
list = list->next;
}
return (REVERSE_LIST (new_list, REDIRECT *));
}
static FOR_COM *
copy_for_command (com)
FOR_COM *com;
{
FOR_COM *new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM));
new_for->flags = com->flags;
new_for->name = copy_word (com->name);
new_for->map_list = copy_word_list (com->map_list);
new_for->action = copy_command (com->action);
return (new_for);
}
#if defined (SELECT_COMMAND)
static SELECT_COM *
copy_select_command (com)
SELECT_COM *com;
{
SELECT_COM *new_select = (SELECT_COM *)xmalloc (sizeof (SELECT_COM));
new_select->flags = com->flags;
new_select->name = copy_word (com->name);
new_select->map_list = copy_word_list (com->map_list);
new_select->action = copy_command (com->action);
return (new_select);
}
#endif /* SELECT_COMMAND */
static GROUP_COM *
copy_group_command (com)
GROUP_COM *com;
{
GROUP_COM *new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM));
new_group->command = copy_command (com->command);
return (new_group);
}
static CASE_COM *
copy_case_command (com)
CASE_COM *com;
{
CASE_COM *new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM));
new_case->flags = com->flags;
new_case->word = copy_word (com->word);
new_case->clauses = copy_case_clauses (com->clauses);
return (new_case);
}
static WHILE_COM *
copy_while_command (com)
WHILE_COM *com;
{
WHILE_COM *new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM));
new_while->flags = com->flags;
new_while->test = copy_command (com->test);
new_while->action = copy_command (com->action);
return (new_while);
}
static IF_COM *
copy_if_command (com)
IF_COM *com;
{
IF_COM *new_if = (IF_COM *)xmalloc (sizeof (IF_COM));
new_if->flags = com->flags;
new_if->test = copy_command (com->test);
new_if->true_case = copy_command (com->true_case);
new_if->false_case = copy_command (com->false_case);
return (new_if);
}
static SIMPLE_COM *
copy_simple_command (com)
SIMPLE_COM *com;
{
SIMPLE_COM *new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM));
new_simple->flags = com->flags;
new_simple->words = copy_word_list (com->words);
new_simple->redirects = copy_redirects (com->redirects);
new_simple->line = com->line;
return (new_simple);
}
static FUNCTION_DEF *
copy_function_def (com)
FUNCTION_DEF *com;
{
FUNCTION_DEF *new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF));
new_def->name = copy_word (com->name);
new_def->command = copy_command (com->command);
return (new_def);
}
/* Copy the command structure in COMMAND. Return a pointer to the
copy. Don't you forget to dispose_command () on this pointer
later! */
COMMAND *
copy_command (command)
COMMAND *command;
{
COMMAND *new_command = (COMMAND *)NULL;
if (command)
{
new_command = (COMMAND *)xmalloc (sizeof (COMMAND));
FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND));
new_command->flags = command->flags;
new_command->line = command->line;
if (command->redirects)
new_command->redirects = copy_redirects (command->redirects);
switch (command->type)
{
case cm_for:
new_command->value.For = copy_for_command (command->value.For);
break;
#if defined (SELECT_COMMAND)
case cm_select:
new_command->value.Select = copy_select_command (command->value.Select);
break;
#endif
case cm_group:
new_command->value.Group = copy_group_command (command->value.Group);
break;
case cm_case:
new_command->value.Case = copy_case_command (command->value.Case);
break;
case cm_until:
case cm_while:
new_command->value.While = copy_while_command (command->value.While);
break;
case cm_if:
new_command->value.If = copy_if_command (command->value.If);
break;
case cm_simple:
new_command->value.Simple = copy_simple_command (command->value.Simple);
break;
case cm_connection:
{
CONNECTION *new_connection;
new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION));
new_connection->connector = command->value.Connection->connector;
new_connection->first =
copy_command (command->value.Connection->first);
new_connection->second =
copy_command (command->value.Connection->second);
new_command->value.Connection = new_connection;
break;
}
/* Pathological case. I'm not even sure that you can have a
function definition as part of a function definition. */
case cm_function_def:
new_command->value.Function_def =
copy_function_def (command->value.Function_def);
break;
}
}
return (new_command);
}