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      1 /* This file is included!
      2                             __  __            _
      3                          ___\ \/ /_ __   __ _| |_
      4                         / _ \\  /| '_ \ / _` | __|
      5                        |  __//  \| |_) | (_| | |_
      6                         \___/_/\_\ .__/ \__,_|\__|
      7                                  |_| XML parser
      8 
      9    Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
     10    Copyright (c) 2000      Clark Cooper <coopercc (at) users.sourceforge.net>
     11    Copyright (c) 2002      Greg Stein <gstein (at) users.sourceforge.net>
     12    Copyright (c) 2002      Fred L. Drake, Jr. <fdrake (at) users.sourceforge.net>
     13    Copyright (c) 2002-2006 Karl Waclawek <karl (at) waclawek.net>
     14    Copyright (c) 2017-2021 Sebastian Pipping <sebastian (at) pipping.org>
     15    Copyright (c) 2025      Alfonso Gregory <gfunni234 (at) gmail.com>
     16    Licensed under the MIT license:
     17 
     18    Permission is  hereby granted,  free of charge,  to any  person obtaining
     19    a  copy  of  this  software   and  associated  documentation  files  (the
     20    "Software"),  to  deal in  the  Software  without restriction,  including
     21    without  limitation the  rights  to use,  copy,  modify, merge,  publish,
     22    distribute, sublicense, and/or sell copies of the Software, and to permit
     23    persons  to whom  the Software  is  furnished to  do so,  subject to  the
     24    following conditions:
     25 
     26    The above copyright  notice and this permission notice  shall be included
     27    in all copies or substantial portions of the Software.
     28 
     29    THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
     30    EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
     31    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
     32    NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
     33    DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
     34    OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     35    USE OR OTHER DEALINGS IN THE SOFTWARE.
     36 */
     37 
     38 #ifdef XML_TOK_NS_C
     39 
     40 const ENCODING *
     41 NS(XmlGetUtf8InternalEncoding)(void) {
     42   return &ns(internal_utf8_encoding).enc;
     43 }
     44 
     45 const ENCODING *
     46 NS(XmlGetUtf16InternalEncoding)(void) {
     47 #  if BYTEORDER == 1234
     48   return &ns(internal_little2_encoding).enc;
     49 #  elif BYTEORDER == 4321
     50   return &ns(internal_big2_encoding).enc;
     51 #  else
     52   const short n = 1;
     53   return (*(const char *)&n ? &ns(internal_little2_encoding).enc
     54                             : &ns(internal_big2_encoding).enc);
     55 #  endif
     56 }
     57 
     58 static const ENCODING *const NS(encodings)[] = {
     59     &ns(latin1_encoding).enc, &ns(ascii_encoding).enc,
     60     &ns(utf8_encoding).enc,   &ns(big2_encoding).enc,
     61     &ns(big2_encoding).enc,   &ns(little2_encoding).enc,
     62     &ns(utf8_encoding).enc /* NO_ENC */
     63 };
     64 
     65 static int PTRCALL
     66 NS(initScanProlog)(const ENCODING *enc, const char *ptr, const char *end,
     67                    const char **nextTokPtr) {
     68   return initScan(NS(encodings), (const INIT_ENCODING *)enc, XML_PROLOG_STATE,
     69                   ptr, end, nextTokPtr);
     70 }
     71 
     72 static int PTRCALL
     73 NS(initScanContent)(const ENCODING *enc, const char *ptr, const char *end,
     74                     const char **nextTokPtr) {
     75   return initScan(NS(encodings), (const INIT_ENCODING *)enc, XML_CONTENT_STATE,
     76                   ptr, end, nextTokPtr);
     77 }
     78 
     79 int
     80 NS(XmlInitEncoding)(INIT_ENCODING *p, const ENCODING **encPtr,
     81                     const char *name) {
     82   int i = getEncodingIndex(name);
     83   if (i == UNKNOWN_ENC)
     84     return 0;
     85   SET_INIT_ENC_INDEX(p, i);
     86   p->initEnc.scanners[XML_PROLOG_STATE] = NS(initScanProlog);
     87   p->initEnc.scanners[XML_CONTENT_STATE] = NS(initScanContent);
     88   p->initEnc.updatePosition = initUpdatePosition;
     89   p->encPtr = encPtr;
     90   *encPtr = &(p->initEnc);
     91   return 1;
     92 }
     93 
     94 static const ENCODING *
     95 NS(findEncoding)(const ENCODING *enc, const char *ptr, const char *end) {
     96 #  define ENCODING_MAX 128
     97   char buf[ENCODING_MAX] = "";
     98   char *p = buf;
     99   int i;
    100   XmlUtf8Convert(enc, &ptr, end, &p, p + ENCODING_MAX - 1);
    101   if (ptr != end)
    102     return NULL;
    103   *p = 0;
    104   if (streqci(buf, KW_UTF_16) && enc->minBytesPerChar == 2)
    105     return enc;
    106   i = getEncodingIndex(buf);
    107   if (i == UNKNOWN_ENC)
    108     return NULL;
    109   return NS(encodings)[i];
    110 }
    111 
    112 int
    113 NS(XmlParseXmlDecl)(int isGeneralTextEntity, const ENCODING *enc,
    114                     const char *ptr, const char *end, const char **badPtr,
    115                     const char **versionPtr, const char **versionEndPtr,
    116                     const char **encodingName, const ENCODING **encoding,
    117                     int *standalone) {
    118   return doParseXmlDecl(NS(findEncoding), isGeneralTextEntity, enc, ptr, end,
    119                         badPtr, versionPtr, versionEndPtr, encodingName,
    120                         encoding, standalone);
    121 }
    122 
    123 #endif /* XML_TOK_NS_C */
    124