1-2.c

實現基本的資料壓縮演算法的參考,以run-length編碼的的演算法機制,所得出的源碼

#include<stdio.h>

#define BUFFER_SIZE 102400

typedef unsigned char byte;

unsigned char buffer[BUFFER_SIZE];

int encode(FILE *fp,byte *img,int mx);

/* mainㄧ计 */
int main(int ac,char *av[])
{
    FILE *fp_i,*fp_o;
    int i,c;

    if(ac<3) {
        exit(8);
    }
    fp_i=fopen(av[1],"rb");
    if(fp_i==NULL) {
        fprintf(stderr,"Input File cannot open\n");
        exit(8);
    }
    i=0;
    while(i<BUFFER_SIZE && (c=fgetc(fp_i))!=EOF) {
        buffer[i]=c;
        i++;
    }
    fclose(fp_i);
    fp_o=fopen(av[2],"wb");
    if(fp_o==NULL) {
        fprintf(stderr,"Output File cannot open\n");
        exit(8);
    }
    encode(fp_o,buffer,i);
    fclose(fp_o);
    return 0;
}

/* ―