diff options
Diffstat (limited to 'dispose_cmd.c')
| -rw-r--r-- | dispose_cmd.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/dispose_cmd.c b/dispose_cmd.c new file mode 100644 index 0000000..ee2e68c --- /dev/null +++ b/dispose_cmd.c @@ -0,0 +1,329 @@ +/* dispose_command.c -- dispose of a COMMAND structure. */ + +/* Copyright (C) 1987-2005 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 2, 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, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +#include "config.h" + +#include "bashtypes.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "bashansi.h" +#include "shell.h" + +extern sh_obj_cache_t wdcache, wlcache; + +/* Dispose of the command structure passed. */ +void +dispose_command (command) + COMMAND *command; +{ + if (command == 0) + return; + + if (command->redirects) + dispose_redirects (command->redirects); + + switch (command->type) + { + case cm_for: +#if defined (SELECT_COMMAND) + case cm_select: +#endif + { + register FOR_COM *c; +#if defined (SELECT_COMMAND) + if (command->type == cm_select) + c = (FOR_COM *)command->value.Select; + else +#endif + c = command->value.For; + dispose_word (c->name); + dispose_words (c->map_list); + dispose_command (c->action); + free (c); + break; + } + +#if defined (ARITH_FOR_COMMAND) + case cm_arith_for: + { + register ARITH_FOR_COM *c; + + c = command->value.ArithFor; + dispose_words (c->init); + dispose_words (c->test); + dispose_words (c->step); + dispose_command (c->action); + free (c); + break; + } +#endif /* ARITH_FOR_COMMAND */ + + case cm_group: + { + dispose_command (command->value.Group->command); + free (command->value.Group); + break; + } + + case cm_subshell: + { + dispose_command (command->value.Subshell->command); + free (command->value.Subshell); + break; + } + + case cm_case: + { + register CASE_COM *c; + PATTERN_LIST *t, *p; + + c = command->value.Case; + dispose_word (c->word); + + for (p = c->clauses; p; ) + { + dispose_words (p->patterns); + dispose_command (p->action); + t = p; + p = p->next; + free (t); + } + free (c); + break; + } + + case cm_until: + case cm_while: + { + register WHILE_COM *c; + + c = command->value.While; + dispose_command (c->test); + dispose_command (c->action); + free (c); + break; + } + + case cm_if: + { + register IF_COM *c; + + c = command->value.If; + dispose_command (c->test); + dispose_command (c->true_case); + dispose_command (c->false_case); + free (c); + break; + } + + case cm_simple: + { + register SIMPLE_COM *c; + + c = command->value.Simple; + dispose_words (c->words); + dispose_redirects (c->redirects); + free (c); + break; + } + + case cm_connection: + { + register CONNECTION *c; + + c = command->value.Connection; + dispose_command (c->first); + dispose_command (c->second); + free (c); + break; + } + +#if defined (DPAREN_ARITHMETIC) + case cm_arith: + { + register ARITH_COM *c; + + c = command->value.Arith; + dispose_words (c->exp); + free (c); + break; + } +#endif /* DPAREN_ARITHMETIC */ + +#if defined (COND_COMMAND) + case cm_cond: + { + register COND_COM *c; + + c = command->value.Cond; + dispose_cond_node (c); + break; + } +#endif /* COND_COMMAND */ + + case cm_function_def: + { + register FUNCTION_DEF *c; + + c = command->value.Function_def; + dispose_function_def (c); + break; + } + + default: + command_error ("dispose_command", CMDERR_BADTYPE, command->type, 0); + break; + } + free (command); +} + +#if defined (COND_COMMAND) +/* How to free a node in a conditional command. */ +void +dispose_cond_node (cond) + COND_COM *cond; +{ + if (cond) + { + if (cond->left) + dispose_cond_node (cond->left); + if (cond->right) + dispose_cond_node (cond->right); + if (cond->op) + dispose_word (cond->op); + free (cond); + } +} +#endif /* COND_COMMAND */ + +void +dispose_function_def_contents (c) + FUNCTION_DEF *c; +{ + dispose_word (c->name); + dispose_command (c->command); + FREE (c->source_file); +} + +void +dispose_function_def (c) + FUNCTION_DEF *c; +{ + dispose_function_def_contents (c); + free (c); +} + +/* How to free a WORD_DESC. */ +void +dispose_word (w) + WORD_DESC *w; +{ + FREE (w->word); + ocache_free (wdcache, WORD_DESC, w); +} + +/* Free a WORD_DESC, but not the word contained within. */ +void +dispose_word_desc (w) + WORD_DESC *w; +{ + w->word = 0; + ocache_free (wdcache, WORD_DESC, w); +} + +/* How to get rid of a linked list of words. A WORD_LIST. */ +void +dispose_words (list) + WORD_LIST *list; +{ + WORD_LIST *t; + + while (list) + { + t = list; + list = list->next; + dispose_word (t->word); +#if 0 + free (t); +#else + ocache_free (wlcache, WORD_LIST, t); +#endif + } +} + +#ifdef INCLUDE_UNUSED +/* How to dispose of an array of pointers to char. This is identical to + free_array in stringlib.c. */ +void +dispose_word_array (array) + char **array; +{ + register int count; + + if (array == 0) + return; + + for (count = 0; array[count]; count++) + free (array[count]); + + free (array); +} +#endif + +/* How to dispose of an list of redirections. A REDIRECT. */ +void +dispose_redirects (list) + REDIRECT *list; +{ + register REDIRECT *t; + + while (list) + { + t = list; + list = list->next; + switch (t->instruction) + { + case r_reading_until: + case r_deblank_reading_until: + free (t->here_doc_eof); + /*FALLTHROUGH*/ + case r_reading_string: + case r_output_direction: + case r_input_direction: + case r_inputa_direction: + case r_appending_to: + case r_err_and_out: + case r_input_output: + case r_output_force: + case r_duplicating_input_word: + case r_duplicating_output_word: + case r_move_input_word: + case r_move_output_word: + dispose_word (t->redirectee.filename); + /* FALLTHROUGH */ + default: + break; + } + free (t); + } +} |