/*-*- 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 2022 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/calls/pledge.internal.h"
#include "libc/macros.internal.h"
#include "libc/str/str.h"

static int FindPromise(const char *name) {
  int i;
  for (i = 0; i < ARRAYLEN(kPledge); ++i) {
    if (!strcasecmp(name, kPledge[i].name)) {
      return i;
    }
  }
  return -1;
}

/**
 * Parses the arguments to pledge() into a bitmask.
 *
 * @return 0 on success, or -1 if invalid
 */
int ParsePromises(const char *promises, unsigned long *out) {
  int rc = 0;
  int promise;
  unsigned long ipromises;
  char *tok, *state, *start, buf[256];
  if (promises) {
    ipromises = -1;
    if (memccpy(buf, promises, 0, sizeof(buf))) {
      start = buf;
      while ((tok = strtok_r(start, " \t\r\n", &state))) {
        if ((promise = FindPromise(tok)) != -1) {
          ipromises &= ~(1ULL << promise);
        } else {
          rc = -1;
          break;
        }
        start = 0;
      }
    } else {
      rc = -1;
    }
  } else {
    ipromises = 0;
  }
  if (!rc) {
    *out = ipromises;
  }
  return rc;
}
