project_files/frontlib/util/list.h
author unc0rr
Wed, 01 Jan 2014 23:28:24 +0400
changeset 9904 ef3321c86912
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child 10017 de822cd3df3a
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Prepend '!' to 42nd scheme parameter in network traffic
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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 */
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/**
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 * Simple dynamic array manipulation functions.
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 */
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#ifndef LIST_H_
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#define LIST_H_
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#include <stddef.h>
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#include <string.h>
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#include <stdlib.h>
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#include "util.h"
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#include "logging.h"
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/**
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 * Generate a static function that inserts a new value into a heap array of the given type,
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 * using realloc and memmove to increase the capacity and shift existing values.
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 * The function takes a pointer to the array variable and a pointer to the size variable
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 * because both can be changed by this operation (realloc / increment).
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 * The function returns 0 on success and leaves the array unchanged on error.
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 */
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#define GENERATE_STATIC_LIST_INSERT(fname, type) \
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	static int fname(type **listptr, int *listSizePtr, type element, int pos) { \
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		int result = -1; \
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		if(!log_badargs_if4(listptr==NULL, listSizePtr==NULL, pos < 0, pos > *listSizePtr)) { \
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			type *newList = flib_realloc(*listptr, ((*listSizePtr)+1)*sizeof(type)); \
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			if(newList) { \
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				memmove(newList + (pos+1), newList + pos, ((*listSizePtr)-pos)*sizeof(type)); \
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				newList[pos] = element; \
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				(*listSizePtr)++; \
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				*listptr = newList; \
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				result = 0; \
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			} \
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		} \
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		return result; \
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	}
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/**
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 * Generate a static function that deletes a value from a heap array of the given type,
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 * using realloc and memmove to decrease the capacity and shift existing values.
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 * The function takes a pointer to the array variable and a pointer to the size variable
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 * because both can be changed by this operation (realloc / decrement).
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 * The function returns 0 on success and leaves the array unchanged on error.
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 */
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#define GENERATE_STATIC_LIST_DELETE(fname, type) \
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	static int fname(type **listPtr, int *listSizePtr, int pos) { \
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		int result = -1; \
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		if(!log_badargs_if4(listPtr==NULL, listSizePtr==NULL, pos < 0, pos >= *listSizePtr)) { \
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			memmove((*listPtr) + pos, (*listPtr) + (pos+1), ((*listSizePtr)-(pos+1))*sizeof(type)); \
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			(*listSizePtr)--; \
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			\
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			size_t newCharSize = (*listSizePtr)*sizeof(type); \
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			type *newList = flib_realloc((*listPtr), newCharSize); \
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			if(newList || newCharSize==0) { \
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				(*listPtr) = newList; \
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			} /* If the realloc fails, just keep using the old buffer...*/ \
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			result = 0; \
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		} \
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		return result; \
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	}
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#endif /* LIST_H_ */