curl/lib/curl_ctype.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/

#include "curl_setup.h"

#ifndef CURL_DOES_CONVERSIONS

#undef _U
#define _U (1<<0) /* upper case */
#undef _L
#define _L (1<<1) /* lower case */
#undef _N
#define _N (1<<2) /* decimal numerical digit */
#undef _S
#define _S (1<<3) /* space */
#undef _P
#define _P (1<<4) /* punctuation */
#undef _C
#define _C (1<<5) /* control */
#undef _X
#define _X (1<<6) /* hexadecimal letter */
#undef _B
#define _B (1<<7) /* blank */

static const unsigned char ascii[128] = {
  _C,   _C,     _C,     _C,     _C,     _C,     _C,     _C,
  _C,   _C|_S,  _C|_S,  _C|_S,  _C|_S,  _C|_S,  _C,     _C,
  _C,   _C,     _C,     _C,     _C,     _C,     _C,     _C,
  _C,   _C,     _C,     _C,     _C,     _C,     _C,     _C,
  _S|_B, _P,    _P,     _P,     _P,     _P,     _P,     _P,
  _P,   _P,     _P,     _P,     _P,     _P,     _P,     _P,
  _N,   _N,     _N,     _N,     _N,     _N,     _N,     _N,
  _N,   _N,     _P,     _P,     _P,     _P,     _P,     _P,
  _P,   _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U|_X,  _U,
  _U,   _U,     _U,     _U,     _U,     _U,     _U,     _U,
  _U,   _U,     _U,     _U,     _U,     _U,     _U,     _U,
  _U,   _U,     _U,     _P,     _P,     _P,     _P,     _P,
  _P,   _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L|_X,  _L,
  _L,   _L,     _L,     _L,     _L,     _L,     _L,     _L,
  _L,   _L,     _L,     _L,     _L,     _L,     _L,     _L,
  _L,   _L,     _L,     _P,     _P,     _P,     _P,     _C
};

int Curl_isspace(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & _S);
}

int Curl_isdigit(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & _N);
}

int Curl_isalnum(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_N|_U|_L));
}

int Curl_isxdigit(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_N|_X));
}

int Curl_isgraph(int c)
{
  if((c < 0) || (c >= 0x80) || (c == ' '))
    return FALSE;
  return (ascii[c] & (_N|_X|_U|_L|_P|_S));
}

int Curl_isprint(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_N|_X|_U|_L|_P|_S));
}

int Curl_isalpha(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_U|_L));
}

int Curl_isupper(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_U));
}

int Curl_islower(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_L));
}

int Curl_iscntrl(int c)
{
  if((c < 0) || (c >= 0x80))
    return FALSE;
  return (ascii[c] & (_C));
}

#endif /* !CURL_DOES_CONVERSIONS */