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[OSTEP] wzip.c 본문

프로그래밍/C

[OSTEP] wzip.c

내가하루다 2021. 11. 15. 00:06
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ostep-projects중 initial-utilities/wzip의 해답 코드입니다.

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
 
#define SIZE 15000
 
typedef struct _value
{
    int num;
    char alpha;
}value;
 
int main(int argc, char** argv)
{
    if(argc == 1)
    {
        printf("wzip: file1 [file2 ...]\n");
        return 1;
    }
    FILE* fp;
        
    char input[SIZE];
    char buffer[SIZE];
    size_t len=0;
    ssize_t nread;
    value arr[SIZE];
    int f=0; // for arr
    for(int t=0;t<argc-1;t++)
    {
        char * line = NULL;
        fp=fopen(argv[t+1],"r");
        while((nread=getline(&line,&len,fp)!=-1 ))
        {
            fclose(fp);
            //strcpy(input,line);
            //free(line);
            int cnt=0;
            int j=0;
            memset(buffer,0,sizeof(buffer));
            int temp=0;
            while(1)
            {
                if(line[j] == '\n')
                {
                    arr[f].num = temp;
                    arr[f].alpha = buffer[0];
                    f++;
                    arr[f].num = 1;
                    arr[f].alpha = '\n';
                    f ++; j=0; cnt=0; temp=0;
                    break;
                }
                if(j==strlen(line)-1)
                {
                    if(line[j]==buffer[cnt-1])
                    {
                        buffer[cnt] = line[j];
                        cnt++; j++; temp++;
                    }
                    arr[f].num = temp;
                    arr[f].alpha = buffer[0];
                    f++;
                    cnt=0; j=0; temp=0;
                    break;
                }
                if(cnt==0)
                {
                    buffer[cnt] = line[j];
                    cnt++; j++; temp++;
                }
                else
                {
                    if(line[j]==buffer[cnt-1])
                    {
                        buffer[cnt] = line[j];
                        cnt++; j++; temp++;
                    }
                    else
                    {
                        cnt=0;
                        arr[f].num = temp;
                        arr[f].alpha = buffer[0];
                        f++;
                        memset(buffer,0,sizeof(buffer));
                        temp=0;
                    }
                }
            } // end of while
        } // end of while (nread)
        free(line);
    }//end of for
    int sum=0;
    int i=0;
    while(1)
    {
        if(sum==0)
        {
            if(i==f-1)
            {
                sum+= arr[i].num;
                fwrite(&sum,sizeof(int),1,stdout);
                fwrite(&arr[i].alpha,sizeof(char),1,stdout);
                break;
            }
            else
            {
                sum += arr[i].num;
                i++;
            }
        }
        else // if sum is not zero
        {
            if(i==f-1)
            {
                if ( arr[i].alpha == arr[i-1].alpha )
                {
                    sum += arr[i].num;
                    fwrite(&sum,sizeof(int),1,stdout);
                    fwrite(&arr[i].alpha,sizeof(char),1,stdout);
                    break;
                }
                else
                {
                    fwrite(&sum,sizeof(int),1,stdout);
                    fwrite(&arr[i-1].alpha,sizeof(char),1,stdout);
                    fwrite(&arr[i].num,sizeof(int),1,stdout);
                    fwrite(&arr[i].alpha,sizeof(char),1,stdout);
                    break;
                }
            }
            if(arr[i].alpha == arr[i-1].alpha)
            {
                sum += arr[i].num;
                i++;
            }
            else if(arr[i].alpha != arr[i-1].alpha)
            {
                fwrite(&sum, sizeof(int),1,stdout);    
                fwrite(&(arr[i-1].alpha),sizeof(char),1,stdout);
                sum=0;
            }
        }
    } // end of while
 
    return 0;
}
 cs

<wzip.c>

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