replace_chars.c File Reference

Provides functionality to map one set of characters into another within strings. More...

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

Go to the source code of this file.

Functions
char *	replace_chars (char *s, char *from, char *to)
	Maps one set of characters to another in a given string.

Detailed Description

Provides functionality to map one set of characters into another within strings.

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

M. Borland, C. Saunders, R. Soliday

Definition in file replace_chars.c.

Function Documentation

replace_chars()

char * replace_chars	(	char *	s,
		char *	from,
		char *	to )

Maps one set of characters to another in a given string.

This function replaces each character in the string s that appears in the from string with the corresponding character in the to string. If the to string is shorter than the from string, it pads the to string with spaces. Similarly, if the from string is shorter than the to string, it pads the from string with spaces.

Parameters

s	The string to be modified.
from	The set of characters to be replaced.
to	The set of characters to replace with.

Returns

The modified string s with characters replaced.

Definition at line 32 of file replace_chars.c.

{
  long lt, lf;
  char *ptr, *ptr_to, *ptr_from;
 
  if ((lt = strlen(to)) < (lf = strlen(from))) {
    char *to_temp;
    to_temp = tmalloc(sizeof(*to_temp) * (lf + 1));
    strcpy_ss(to_temp, to);
    for (; lt < lf; lt++)
      to_temp[lt] = ' ';
    to_temp[lf] = 0;
  } else if (lt > lf) {
    char *from_temp;
    from_temp = tmalloc(sizeof(*from_temp) * (lt + 1));
    strcpy_ss(from_temp, from);
    for (; lf < lt; lf++)
      from_temp[lf] = ' ';
    from_temp[lt] = 0;
  }
 
  ptr = s;
  while (*ptr) {
    ptr_to = to;
    ptr_from = from;
    while (*ptr_from)
      if (*ptr_from != *ptr) {
        ptr_from++;
        ptr_to++;
      } else {
        *ptr = *ptr_to;
        break;
      }
    ptr++;
  }
  return (s);
}