l3.libnazgul/src/spaceListRem.c

#include "libnazgul.h"

#define DEBUG 1

int msgSpaceListRem(msgSpaceId spaceId)
{
	msgSpaceList *list;
	msgSpaceListElemId listHeadElemId;
	msgSpaceListElemId listTailElemId;
	msgSpaceListId listId;

	msgSpaceListElemId prevElemId;
	msgSpaceListElemId currElemId;
	msgSpaceListElemId nextElemId;

	msgSpaceListElem *prevElem;
	msgSpaceListElem *currElem;
	msgSpaceId currSpaceId;

	list = msgSpaceListOpen();
	if (list == NULL) {
		NZG_ERROR("msgSpaceListOpen", "");
		goto ERROR;
	}
	if (DEBUG) {
		printf("Before ListStrCpy\n");
	}
	strcpy(listHeadElemId, list->headId);
	strcpy(listTailElemId, list->tailId);
	strcpy(listId, list->id);
	if (DEBUG) {
		printf("After ListStrCpy\n");
	}
	if ((strcmp(listHeadElemId, listId) == 0)
	    && strcmp(listTailElemId, listId) == 0) {
		if (DEBUG) {
			printf("SpaceList : vide\n");
		}
		return 1;
	} else {
		bool found = false;

		strcpy(prevElemId, list->headId);
		strcpy(currElemId, list->headId);
		while (!found) {
			printf("Recherche dans l'element %s\n", listHeadElemId);
			currElem = msgSpaceListElemOpen(currElemId);
			if (currElem == NULL) {
				NZG_ERROR("msgSpaceListElemOpen", currElemId);
				goto ERROR;
			}
			strcpy(nextElemId, currElem->next);
			strcpy(currSpaceId, currElem->spaceId);
			if (msgSpaceListElemClose(currElem) < 0) {
				NZG_ERROR("msgSpaceListElemClose", currElemId);
				goto ERROR;
			}
			if (strcmp(prevElemId, nextElemId) == 0) {
				// list <20> 1 seul <20>lement
				if (strcmp(currSpaceId, spaceId) == 0) {
					// on a trouv<75> l'elem
					strcpy(list->headId, list->id);
					strcpy(list->tailId, list->id);
					// on efface
					shm_unlink(currElemId);
					found = true;
				} else {
					break;
				}
			} else {
				// liste <20> plusieurs <20>lements...
				if (strcmp(currSpaceId, spaceId) == 0) {
					// ca correspond
					if (strcmp(prevElemId, currElemId) == 0) {
						// si on est en d<>but de liste (prev=current)
						// - la tete de liste pointe sur le suivant
						strcpy(list->headId,
						       nextElemId);
					} else {
						if (strcmp
						    (currElemId,
						     nextElemId) == 0) {
							// si on est en find de liste (current=next)
							// - on fait pointer la queue de liste sur le pr<70>c<EFBFBD>dent
							strcpy(list->tailId,
							       prevElemId);
							// - on fait pointer le pr<70>c<EFBFBD>dent sur lui-meme
							prevElem =
							    msgSpaceListElemOpen
							    (prevElemId);
							strcpy(prevElem->next,
							       prevElemId);
							msgSpaceListElemClose
							    (prevElem);
						} else {
							// on est en milieu de liste
							// - on fait pointer le pr<70>c<EFBFBD>dent sur le suivant
							prevElem =
							    msgSpaceListElemOpen
							    (prevElemId);
							strcpy(prevElem->next,
							       nextElemId);
							msgSpaceListElemClose
							    (prevElem);
						}
					}
					// - on d<>truit l'actuel
					shm_unlink(currElemId);
					found = true;
					break;
				} else {
					//cela ne correspond pas
					//on recopie
					strcpy(prevElemId, currElemId);
					strcpy(currElemId, nextElemId);
				}
			}

		}
		if (msgSpaceListClose(list) < 0) {
			NZG_ERROR("msgSpaceListClose", "");
			goto ERROR;
		}
		return 0;
	}
 ERROR:
	return -1;
}