CODEWITHSUNDEEP
c
Parth Shah
Parth Shah

Reputation: 573

C Print string from a particular character

I am trying to extract relative path name from absolute path name. Is there a function for this in C? Is there a function to print string starting from a particular character(I have the index)?

Upvotes: 0

Views: 482

Answers (3)

Shiplu Mokaddim
Shiplu Mokaddim

Reputation: 57650

If you have the index you can do it quite easily.

char * src = "YOUR STRING";
char * dst; // destination
dst = (char *) malloc( sizeof(char) * 20);
dst = (char *)memcpy(dst, &src[THE_INDEX_YOU_KNOW], strlen(src)-THE_INDEX_YOU_KNOW);
dst[len-start]='\0';

Upvotes: 0

Whoami
Whoami

Reputation: 14408

As joseph mentioned, you can use basename().

Hope the following program helps a bit. 

#include <stdio.h>
#include <stdlib.h>
#include <libgen.h>
#include <string.h>

int main ( int argc, char **  argv)
{
  char *path = "/Users/lionnew/cpgm";
  printf ("%s\n", basename (path));

  /* If you have an index */

  int index =15;
  int len = strlen(path);
  char * dest = malloc(len+1);
  dest[len] = '\0';

  strcpy (dest, (path+index));
  printf ("\n Destination String %s ", dest);

}

NOTE: Make sure your index value is not geater than the string len to avoid segmentation fault.

Hope this helps to some extend. ;)

Upvotes: 0

Joseph Quinsey
Joseph Quinsey

Reputation: 9962

In POSIX.1-2001 (e.g. Linux), man 3 basename gives:

The functions dirname() and basename() break a null-terminated pathname string into directory and filename components. In the usual case, ... basename() returns the component following the final '/'. Trailing '/' characters are not counted as part of the pathname.

Upvotes: 2

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