compress.c File Reference

Detailed Description

Implements a simple string compression utility.

This file provides the compressString function, which removes consecutive duplicate characters from a string when those characters appear in a reference string. It is typically used to collapse runs of whitespace or other repeated characters.

Copyright

• (c) 2002 The University of Chicago, as Operator of Argonne National Laboratory.
• (c) 2002 The Regents of the University of California, as Operator of Los Alamos National Laboratory.

License

This file is distributed under the terms of the Software License Agreement found in the file LICENSE included with this distribution.

Author

C. Saunders, R. Soliday

Definition in file compress.c.

#include "mdb.h"
#include <ctype.h>

Go to the source code of this file.

Functions
char *	compressString (char *s, char *t)
	Eliminates repeated occurrences of characters in string t from string s.

Function Documentation

compressString()

char * compressString	(	char *	s,
		char *	t )

Eliminates repeated occurrences of characters in string t from string s.

This function removes consecutive duplicate characters in string s that are present in string t.

Parameters

s	Pointer to the string to be compressed. The string is modified in place.
t	Pointer to the string containing characters to remove from s.

Returns

Pointer to the compressed string s.

Definition at line 33 of file compress.c.

                                       {
  register char *ptr, *ptr0, *tptr;
 
  ptr = ptr0 = s;
  while (*ptr0) {
    tptr = t;
    while (*tptr) {
      if (*tptr != *ptr0) {
        tptr++;
        continue;
      }
      while (*++ptr0 == *tptr)
        ;
      tptr++;
      ptr0--;
    }
    *ptr++ = *ptr0++;
  }
  *ptr = 0;
  return (s);
}