conf-database/conf.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "conf.h"

int findConfId(ptConf confChain) {
    ptConf px = confChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptConf newConfChain() {
    ptConf confChain = (ptConf) malloc(sizeof(tConf));

    confChain -> next = NULL;

    return confChain;
}

void addConf(ptConf confChain, int id, char title[], char speaker[], int day, int month, int year) {
    ptConf px = confChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    px -> day = day;
    px -> month = month;
    px -> year = year;
    strcpy(px -> title, title);
    strcpy(px -> speaker, speaker);
    px -> listeners = (ptListenerList) malloc(sizeof(tListenerList));
	px -> listeners -> next = NULL;
    px -> next = (ptConf) malloc(sizeof(tConf));
    px -> next -> next = NULL;
}

void removeConf(ptConf confChain, int id) {
    ptConf px = confChain;

    if (px -> next -> next == NULL) {
        free(px -> next);
        px -> next = NULL;
    } else if (px -> id == id) {
        px -> id = px -> next -> id;
        strcpy(px -> title, px -> next -> title);
        strcpy(px -> speaker, px -> next -> speaker);
        px -> day = px -> next -> day;
        px -> month = px -> next -> month;
        px -> year = px -> next -> year;

        ptConf tmp = px -> next;
        px -> next = px -> next -> next;
        free(tmp);
    } else {
        while (px -> next != NULL && px -> next -> id != id) {
            px = px -> next;
        }

        if (px -> next -> id == id) {
            ptConf tmp = px -> next;
            px -> next = px -> next -> next;
            free(tmp);
        }
    }
}

int findListenerId(ptListener listenerChain) {
    ptListener px = listenerChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptListener newListenerChain() {
    ptListener listenerChain = (ptListener) malloc(sizeof(tListener));

    listenerChain -> prev = NULL;
    listenerChain -> next = NULL;

    return listenerChain;
}

void addListener(ptListener listenerChain, int id, char name[], int age, int level) {
    ptListener px = listenerChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    strcpy(px -> name, name);
    px -> age = age;
    px -> level = level;
    px -> confs = (ptConfList) malloc(sizeof(tConfList));
	px -> confs -> next = NULL;
    px -> next = (ptListener) malloc(sizeof(tListener));
    px -> next -> next = NULL;
    px -> next -> prev = px;
}

void removeListener(ptListener listenerChain, int id) {
    ptListener px = listenerChain;

    if (px -> next -> next == NULL) {
        free(px -> next);
        px -> next = NULL;
    } else if (px -> id == id) {
        px -> id = px -> next -> id;
        strcpy(px -> name, px -> next -> name);
        px -> age = px -> next -> age;
        px -> level = px -> next -> level;

        ptListener tmp = px -> next;
        px -> next = px -> next -> next;
        px -> next -> prev = px;
        free(tmp);
    } else {
        while (px -> next != NULL && px -> next -> id != id) {
            px = px -> next;
        }

        if (px -> next -> id == id) {
            ptListener tmp = px -> next;
            px -> next = px -> next -> next;
            px -> next -> prev = px;
            free(tmp);
        }
    }
}

void addConfToConfList(ptConfList confList, ptConf conf, int grade) {
	ptConfList px = confList;
	
	while (px -> next != NULL) {
		px = px -> next;
	}
	
	px -> conf = conf;
	px -> next = (ptConfList) malloc(sizeof(tConfList));
    px -> grade = grade;
	px -> next -> next = NULL;
}

void printConfList(ptConfList confList) {
	ptConfList px = confList;
	
	printf("Participation aux conferences : ");
	while (px -> next != NULL) {
		printf("%s(%d) ", px -> conf -> title, px -> grade);
		px = px -> next;
	}
	printf("\n");
}

void addListenerToListenerList(ptListenerList listenerList, ptListener listener, int grade) {
	ptListenerList px = listenerList;
	
	while (px -> next != NULL) {
		px = px -> next;
	}
	
	px -> listener = listener;
	px -> next = (ptListenerList) malloc(sizeof(tListenerList));
    px -> grade = grade;
	px -> next -> next = NULL;
}

void printListenerList(ptListenerList listenerList) {
	ptListenerList px = listenerList;
	
	printf("Participants : ");
	while (px -> next != NULL) {
		printf("%s(%d) ", px -> listener -> name, px -> grade);
		px = px -> next;
	}
	printf("\n");
}

void participateToConf(ptConf confChain, ptListener listenerChain, int confId, int listenerId, int grade) {
	ptConf px = confChain;
	ptListener py = listenerChain;
	ptListenerList pz;
	
	while (px -> next != NULL && px -> id != confId) {
		px = px -> next;
	}
	
	pz = px -> listeners;
	while (pz -> next != NULL) {
		if (pz -> listener -> id == listenerId) {
			return;
		}
		pz = pz -> next;
	}
	
	while (py -> next != NULL && py -> id != listenerId) {
		py = py -> next;
	}
	
	if (px -> id != confId || py -> id != listenerId) {
		return;
	}
	
	addListenerToListenerList(px -> listeners, py, grade);
	addConfToConfList(py -> confs, px, grade);
}

int confGradeAvg(ptConf conf) {
    ptListenerList px = conf -> listeners;
    int total = 0, nb = 0;

    while (px -> next != NULL) {
        total += px -> grade;
        nb++;
        px = px -> next;
    }

    if (nb != 0) {
        return total / nb;
    } else {
        return -1;
    }

}

int confParticipations(ptConf conf) {
    ptListenerList px = conf -> listeners;
    int nb = 0;

    while (px -> next != NULL) {
        nb++;
        px = px -> next;
    }

    return nb;
}