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/*
* str_list.h
*
* String list macros.
*
* Copyright 1999-2008 Gentoo Foundation
* Copyright 2004-2007 Martin Schlemmer <azarah@nosferatu.za.org>
* Licensed under the GPL-2
*/
#ifndef __RC_STR_LIST_H__
#define __RC_STR_LIST_H__
/* Add a new item to a string list. If the pointer to the list is NULL,
* allocate enough memory for the amount of entries needed. Ditto for
* when it already exists, but we add one more entry than it can
* contain. The list is NULL terminated.
* NOTE: _only_ memory for the list are allocated, and not for the items - that
* should be done by relevant code (unlike str_list_del_item() that will
* free the memory) */
#define str_list_add_item(_string_list, _item, _error) \
do { \
char **_tmp_p; \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
while ((NULL != _string_list) && (NULL != _string_list[_i])) \
{ \
_i++; \
} \
/* Amount of entries + new + terminator */ \
_tmp_p = xrealloc (_string_list, sizeof (char *) * (_i + 2)); \
_string_list = _tmp_p; \
_string_list[_i] = _item; \
/* Terminator */ \
_string_list[_i+1] = NULL; \
} while (0)
/* Same as above, just makes a copy of the item, so calling code do not need
* to do this. */
#define str_list_add_item_copy(_string_list, _item, _error) \
do { \
char *_tmp_str; \
char **_tmp_p; \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
while ((NULL != _string_list) && (NULL != _string_list[_i])) \
{ \
_i++; \
} \
/* Amount of entries + new + terminator */ \
_tmp_p = xrealloc (_string_list, sizeof (char *) * (_i + 2)); \
_string_list = _tmp_p; \
_tmp_str = xstrdup (_item); \
_string_list[_i] = _tmp_str; \
/* Terminator */ \
_string_list[_i+1] = NULL; \
} while (0)
/* Add a new item to a string list (foundamental the same as above), but make
* sure we have all the items alphabetically sorted. */
#define str_list_add_item_sorted(_string_list, _item, _error) \
do { \
char **_tmp_p; \
char *_str_p1; \
char *_str_p2; \
int _i = 0; \
if (!check_str (_item)) \
{ \
goto _error; \
} \
while ((NULL != _string_list) && (NULL != _string_list[_i])) \
{ \
_i++; \
} \
/* Amount of entries + new + terminator */ \
_tmp_p = xrealloc (_string_list, sizeof (char *) * (_i + 2)); \
_string_list = _tmp_p; \
if (0 == _i) \
{ \
/* Needed so that the end NULL will propagate
* (iow, make sure our 'NULL != _str_p1' test below
* do not fail) */ \
_string_list[_i] = NULL; \
} \
/* Actual terminator that needs adding */ \
_string_list[_i+1] = NULL; \
_i = 0; \
/* See where we should insert the new item to have it all \
* alphabetically sorted */ \
while (NULL != _string_list[_i]) \
{ \
if (strcmp (_string_list[_i], _item) > 0) \
{ \
break; \
} \
_i++; \
} \
/* Now just insert the new item, and shift the rest one over.
* '_str_p2' is temporary storage to swap the indexes in a loop,
* and 'str_p1' is used to store the old value across the loop */ \
_str_p1 = _string_list[_i]; \
_string_list[_i] = _item; \
do { \
_i++;\
_str_p2 = _string_list[_i]; \
_string_list[_i] = _str_p1; \
_str_p1 = _str_p2; \
} while (NULL != _str_p1); \
} while (0)
/* Step through each entry in the string list, setting '_pos' to the
* beginning of the entry. '_counter' is used by the macro as index,
* but should not be used by code as index (or if really needed, then
* it should usually by +1 from what you expect, and should only be
* used in the scope of the macro) */
#define str_list_for_each_item(_string_list, _pos, _counter) \
if ((NULL != _string_list) && (0 == (_counter = 0))) \
while (NULL != (_pos = _string_list[_counter++]))
/* Just free the whole string list */
#define str_list_free(_string_list) \
do { \
if (NULL != _string_list) \
{ \
int _i = 0; \
while (NULL != _string_list[_i]) \
{ \
free (_string_list[_i]); \
_string_list[_i++] = NULL; \
} \
free (_string_list); \
_string_list = NULL; \
} \
} while (0)
#endif /* __RC_STR_LIST_H__ */
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