#include <ctype.h>
#include <gargoyle/codex.h>
#include <gargoyle/twine.h>

uint8_t gargoyle_cmp(const char *s1, const char *s2, uint16_t len, gargoyle_flag_type flags) {
  while(*s1 && *s2 && len) {
    if(flags & GARGOYLE_FLG_ICASE && isalpha(*s1) && gargoyle_is_eql(*s1, *s2)) {
      s1 += 1, s2 += 1;
    } else if(flags & GARGOYLE_FLG_SYMBL && gargoyle_is_sep(*s1) && gargoyle_is_sep(*s2)) {
      s1 += 1, s2 += 1;
    } else if(*s1 == *s2) {
      s1 += 1, s2 += 1;
    } else {
      return 0;
    }

    len -= 1;
  }

  return !len || *s1 == *s2;
}

char *gargoyle_cpy(char *dst, const char *src, uint16_t len, gargoyle_flag_type flags) {
  if(flags & GARGOYLE_FLG_FILL0) {
    *(dst + len - 1) = '\0';
    len -= 1;
  }

  for(; len; dst += 1, len -= 1) {
    if(*src) {
      *dst = *src;
      src += 1;
    } else {
      *dst = '\0';
    }
  }

  return dst;
}

uint8_t gargoyle_is_eql(char lhs, char rhs) {
  return tolower(lhs) == tolower(rhs);
}

uint8_t gargoyle_is_sep(char tok) {
  return (tok == '_' || tok == '-');
}