Day 16/100 Split Cat

Day 16/100 Split Cat

Cats are liquid, definitely!

So, I wrote a cat program. For those of you who don't know, "cat" is short for "concatenate", which is a way of saying that you will just jumble everything together. This is such a program. I simply adapted the last program, which was FileGlob, to this one, although I end up deleting most of it, anyway.

So, this is the result:

  for (int i=1;i<argc;i++) {

    if (!strcmp(argv[i],"-")) ifp=stdin;

    else if ((ifp=fopen(argv[i],"r"))==NULL) {

      puts("File open Error"); return 1;

    }

    while (lptr=fgets(Data,MAXSTR,ifp))

      ProcessData();

    if (ifp!=stdin) fclose(ifp);

  }

But it's so easy! Therefore, I added a special option: Split. Actually, this is closer to csplit, which split a file separated by a particular regex. I decided to just split it with a particular file name:

void ProcessData() {

  if (sscanf(Data,"WRITE FILE %s",ofname)) {

    if (ofp) { fclose(ofp); ofp=NULL; }

    ofp=fopen(ofname,"w"); return;

  }

  printf("%s",Data);

  if (ofp) fprintf(ofp,"%s",Data);

}

And, uh, that's it! Nothing to it. Too easy!

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define MAXSTR 256

char Data[MAXSTR];

char ofname[MAXSTR];

FILE *ifp;

FILE *ofp=NULL;

void ProcessData();

int Init() {

return 0;

}

int ReadData(int argc, char *argv[]) {

  char *lptr;

  for (int i=1;i<argc;i++) {

    if (!strcmp(argv[i],"-")) ifp=stdin;

    else if ((ifp=fopen(argv[i],"r"))==NULL) {

      puts("File open Error"); return 1;

    }

    while (lptr=fgets(Data,MAXSTR,ifp))

      ProcessData();

    if (ifp!=stdin) fclose(ifp);

  }

  return 0;

}

void ProcessData() {

  if (sscanf(Data,"WRITE FILE %s",ofname)) {

    if (ofp) { fclose(ofp); ofp=NULL; }

    ofp=fopen(ofname,"w"); return;

  }

  printf("%s",Data);

  if (ofp) fprintf(ofp,"%s",Data);

}

void CleanUp() {

  if (ofp) { fclose(ofp); ofp=NULL; }

}

int main (int argc, char *argv[] ) {

  int e=0;

  if (argc<2) {

    puts("cat file1 file2 file3 ...");

    puts("\"WRITE FILE [filename]\" will write to said file");

    return 1;

  }

  Init(argc,argv);

  ReadData(argc,argv);

  CleanUp();

  return e;

}

On that note: I did a function prototype declaration for ProcessData(). I could have just move it to the top, but I decided against it.