Subversion Repositories SvarDOS

/*

 * a variety of helper functions

 * Copyright (C) 2021 Mateusz Viste

 */

#include "helpers.h"

/* case-insensitive comparison of strings, returns non-zero on equality */

int imatch(const char *s1, const char *s2) {

  for (;;) {

    char c1, c2;

    c1 = *s1;

    c2 = *s2;

    if ((c1 >= 'a') && (c1 <= 'z')) c1 -= ('a' - 'A');

    if ((c2 >= 'a') && (c2 <= 'z')) c2 -= ('a' - 'A');

    /* */

    if (c1 != c2) return(0);

    if (c1 == 0) return(1);

    s1++;

    s2++;

  }

}

/* returns zero if s1 starts with s2 */

int strstartswith(const char *s1, const char *s2) {

  while (*s2 != 0) {

    if (*s1 != *s2) return(-1);

    s1++;

    s2++;

  }

  return(0);

}