/*
  Copyright 2011-2020 David Robillard <d@drobilla.net>

  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include "string_utils.h"

#include "serd/serd.h"

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

void
serd_free(void* const ptr)
{
  free(ptr);
}

const char*
serd_strerror(const SerdStatus status)
{
  switch (status) {
  case SERD_SUCCESS:
    return "Success";
  case SERD_FAILURE:
    return "Non-fatal failure";
  case SERD_ERR_UNKNOWN:
    break;
  case SERD_ERR_BAD_SYNTAX:
    return "Invalid syntax";
  case SERD_ERR_BAD_ARG:
    return "Invalid argument";
  case SERD_ERR_NOT_FOUND:
    return "Not found";
  case SERD_ERR_ID_CLASH:
    return "Blank node ID clash";
  case SERD_ERR_BAD_CURIE:
    return "Invalid CURIE or unknown namespace prefix";
  case SERD_ERR_INTERNAL:
    return "Internal error";
  case SERD_ERR_OVERFLOW:
    return "Stack overflow";
  }

  return "Unknown error";
}

static void
serd_update_flags(const char c, SerdNodeFlags* const flags)
{
  switch (c) {
  case '\r':
  case '\n':
    *flags |= SERD_HAS_NEWLINE;
    break;
  case '"':
    *flags |= SERD_HAS_QUOTE;
    break;
  default:
    break;
  }
}

size_t
serd_substrlen(const char* const    str,
               const size_t         len,
               SerdNodeFlags* const flags)
{
  assert(flags);

  size_t i = 0;
  *flags   = 0;
  for (; i < len && str[i]; ++i) {
    serd_update_flags(str[i], flags);
  }

  return i;
}

size_t
serd_strlen(const char* const str, SerdNodeFlags* const flags)
{
  if (flags) {
    size_t i = 0;
    *flags   = 0;
    for (; str[i]; ++i) {
      serd_update_flags(str[i], flags);
    }
    return i;
  }

  return strlen(str);
}