/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/fmt/conv.h"
#include "libc/fmt/strtol.internal.h"
#include "libc/str/str.h"
#include "libc/str/tab.internal.h"

/**
 * Decodes uintmax_t from wide string.
 *
 * @param s is a non-null nul-terminated string
 * @param endptr if non-null will always receive a pointer to the char
 *     following the last one this function processed, which is usually
 *     the NUL byte, or in the case of invalid strings, would point to
 *     the first invalid character
 * @param base can be anywhere between [2,36] or 0 to auto-detect based
 *     on the the prefixes 0 (octal), 0x (hexadecimal), 0b (binary), or
 *     decimal (base 10) by default
 * @return decoded integer mod 2Â¹Â²â¸ negated if leading `-`
 * @see strtoimax()
 */
uintmax_t wcstoumax(const wchar_t *s, wchar_t **endptr, int base) {
  char t = 0;
  int d, c = *s;
  uintmax_t x = 0;
  CONSUME_SPACES(s, c);
  GET_SIGN(s, c, d);
  GET_RADIX(s, c, base);
  if ((c = kBase36[c & 255]) && --c < base) {
    t |= 1;
    do {
      x *= base;
      x += c;
    } while ((c = kBase36[*++s & 255]) && --c < base);
  }
  if (t && endptr) *endptr = s;
  return d > 0 ? x : -x;
}
