/**************************************************************************/
/* hatgeneral.c:                                                          */
/* General library for all kinds of helpful functions used by hat tools   */
/*                                                                        */
/* Thorsten Brehm, 6/2001                                                 */
/**************************************************************************/

/*********************************************************************/
/* basic functions for strings on heap                               */
/*                                                                   */
/*********************************************************************/

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

/* reserve space on heap for given string - and copy */
char* newStr(char* str) {
  char* h = (char*) malloc((strlen(str)+1)*sizeof(char));
  strcpy(h,str);
  return h;
}

/* append strings and reserve space for the result string */
char* catStr (char* s1, char* s2, char* s3) {
  int x = strlen (s1) + 1;
  char* H;
  if (s1 == NULL) return NULL;
  if (s2) x = x + strlen (s2);
  if (s3) x = x + strlen (s3);
  H = (char*) malloc(x*sizeof(char));
  strcpy (H,s1);
  if (s2) strcat (H,s2);
  if (s3) strcat (H,s3);
  return H;
}

/* free memory space */
void freeStr(char* s) {
  free(s);
}

/* replace string in s with the concatenation of s1,s2 and s3 */
void replaceStr(char** s,char* s1,char *s2,char* s3) {
  char* sneu=catStr(s1,s2,s3);
  if (*s != NULL) freeStr(*s);
  (char*) *s = sneu;
}

/*********************************************************************/

int checkParameters(char* str,char* allowed) {
  if (*str!='-') return 1; // bad parameter syntax
  str++;
  if (*str=='\0') return 1; // nothing specified!
  while (*str!='\0') {
    if (strchr(allowed,*str)==NULL)
      return 2; // unsupported parameter
    str++;
  }
  return 0; // string is ok
}