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addslashes.c

#include <includes.h>




/*
 * Escapes \n and \r properly. The resulting string
 * is copied in another buffer.
 */
ExtFunc char * 
addslashes(in)
      char * in;
{
 char * ret;
 char * out;

 if ( in == NULL ) return NULL;

 out = malloc(strlen(in) * 2 + 1);
 bzero(out, strlen(in) * 2 + 1);
 ret = out;
 while(in[0])
 {
  if(in[0] == '\\')
  {
   out[0] = '\\'; out++;
   out[0] = '\\'; out++;
  }

  else if(in[0] == '\n')
  {
   out[0] = '\\'; out++;
   out[0] = 'n'; out++;
  }
  else if(in[0] == '\r')
  {
    out[0] = '\\'; out++;
    out[0] = 'r';  out++;
  }
  else {
        out[0] = in[0];
        out++;
  }
  in++;
 }
 return realloc(ret, strlen(ret) + 1);
}

/*
 * Replaces escape codes (\n, \r) by the real value
 * The resulting string is stored in another buffer
 */
ExtFunc char * 
rmslashes(in)
 char * in;
{
 char * out = malloc(strlen(in) + 1);
 char * ret = out;
 bzero(out, strlen(in) + 1);
 while(in[0])
 {
  if(in[0] == '\\')
  {
   switch(in[1])
   {
    case 'r' :
      out[0] = '\r';
      in++;
      break;
    case 'n' :
      out[0] =  '\n';
      in++;
      break;
    case '\\' :
      out[0] = '\\';
      in++;
      break;
    default :
      fprintf(stderr, "Unknown escape sequence '\\%c'\n", in[1]);
   }
  }
  else out[0] = in[0];
  in++;
  out++;
 }
 return realloc(ret, strlen(ret) + 1);
}


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