viewmap.c

#include <stdio.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include "map_definitions.h"

int main ()
{
        int segment_id;
        char *shared_memory;
        char c;
        unsigned char tmp;
        int i, j ;
        const int shared_segment_size = sizeof(char) * MAP_WIDTH * MAP_HEIGHT;

        /* Get segment identificator in a read only mode  */
        segment_id = shmget (SHM_MAP_KEY, shared_segment_size,
                             S_IRUSR );

        /* Attach the shared memory segment */
        shared_memory = (char*) shmat (segment_id, (void*) 0, 0);
        printf("Char %d", sizeof(char));
        /* Main boucle */
        do{
                printf("\n+");
                for(i=0;i<MAP_WIDTH;i++) printf("-");
                printf("+\n");
                for (j=0;j<MAP_HEIGHT;j++){
                        printf("|");
                        for(i=0;i<MAP_WIDTH;i++){
                                tmp = (*(shared_memory+i+j*MAP_WIDTH));
                                switch (tmp){
                                        case MAP_WALL  :        c='#'; break;
                                        case MAP_PATH  :        c='*'; break;
                                        case MAP_FREE  :        c=' '; break;
                                        case MAP_START :        c='S'; break;
                                        case MAP_GOAL  :        c='G'; break;
                                        default :               c='?'; break;
                                }
                                //printf("%x\t",(*(shared_memory+i+j*MAP_WIDTH)));
                                printf("%c",c );
                        }
                        printf("|\n");
                }
                printf("+");
                for(i=0;i<MAP_WIDTH;i++) printf("-");
                printf("+\n");
                printf("Enter a modification on the map (-1 to exit)\n");
                printf("x="); scanf("%d",&i);
                printf("y="); scanf("%d",&j);
                printf("(%d,%d)\n", i,j);
                if ((i<MAP_WIDTH) && (j<MAP_HEIGHT) && (i>=0) && (j>=0)) 
                        *(shared_memory+i+j*MAP_WIDTH)= MAP_WALL;

        } while (i!= -1);
        /* Detach the shared memory segment.  */
        shmdt (shared_memory);

        return 0;
}

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