/**********************************************************************

  regerror.c -  Onigmo (Oniguruma-mod) (regular expression library)

**********************************************************************/

/*-

 * Copyright (c) 2002-2007  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>

 * Copyright (c) 2011-2019  K.Takata  <kentkt AT csc DOT jp>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include "regint.h"

#include <stdio.h> /* for vsnprintf() */

#include <stdarg.h>

extern UChar*

onig_error_code_to_format(OnigPosition code)

{

  const char *p;

  if (code >= 0) return (UChar* )0;

  switch (code) {

  case ONIG_MISMATCH:

    p = "mismatch"; break;

  case ONIG_NO_SUPPORT_CONFIG:

    p = "no support in this configuration"; break;

  case ONIGERR_MEMORY:

    p = "failed to allocate memory"; break;

  case ONIGERR_TYPE_BUG:

    p = "undefined type (bug)"; break;

  case ONIGERR_PARSER_BUG:

    p = "internal parser error (bug)"; break;

  case ONIGERR_STACK_BUG:

    p = "stack error (bug)"; break;

  case ONIGERR_UNDEFINED_BYTECODE:

    p = "undefined bytecode (bug)"; break;

  case ONIGERR_UNEXPECTED_BYTECODE:

    p = "unexpected bytecode (bug)"; break;

  case ONIGERR_MATCH_STACK_LIMIT_OVER:

    p = "match-stack limit over"; break;

  case ONIGERR_PARSE_DEPTH_LIMIT_OVER:

    p = "parse depth limit over"; break;

  case ONIGERR_DEFAULT_ENCODING_IS_NOT_SET:

    p = "default multibyte-encoding is not set"; break;

#if 0

  case ONIGERR_SPECIFIED_ENCODING_CANT_CONVERT_TO_WIDE_CHAR:

    p = "can't convert to wide-char on specified multibyte-encoding"; break;

#endif

  case ONIGERR_INVALID_ARGUMENT:

    p = "invalid argument"; break;

  case ONIGERR_END_PATTERN_AT_LEFT_BRACE:

    p = "end pattern at left brace"; break;

#if 0

  case ONIGERR_END_PATTERN_AT_LEFT_BRACKET:

    p = "end pattern at left bracket"; break;

#endif

  case ONIGERR_EMPTY_CHAR_CLASS:

    p = "empty char-class"; break;

  case ONIGERR_PREMATURE_END_OF_CHAR_CLASS:

    p = "premature end of char-class"; break;

  case ONIGERR_END_PATTERN_AT_ESCAPE:

    p = "end pattern at escape"; break;

  case ONIGERR_END_PATTERN_AT_META:

    p = "end pattern at meta"; break;

  case ONIGERR_END_PATTERN_AT_CONTROL:

    p = "end pattern at control"; break;

  case ONIGERR_META_CODE_SYNTAX:

    p = "invalid meta-code syntax"; break;

  case ONIGERR_CONTROL_CODE_SYNTAX:

    p = "invalid control-code syntax"; break;

  case ONIGERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE:

    p = "char-class value at end of range"; break;

#if 0

  case ONIGERR_CHAR_CLASS_VALUE_AT_START_OF_RANGE:

    p = "char-class value at start of range"; break;

#endif

  case ONIGERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS:

    p = "unmatched range specifier in char-class"; break;

  case ONIGERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED:

    p = "target of repeat operator is not specified"; break;

  case ONIGERR_TARGET_OF_REPEAT_OPERATOR_INVALID:

    p = "target of repeat operator is invalid"; break;

#if 0

  case ONIGERR_NESTED_REPEAT_OPERATOR:

    p = "nested repeat operator"; break;

#endif

  case ONIGERR_UNMATCHED_CLOSE_PARENTHESIS:

    p = "unmatched close parenthesis"; break;

  case ONIGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS:

    p = "end pattern with unmatched parenthesis"; break;

  case ONIGERR_END_PATTERN_IN_GROUP:

    p = "end pattern in group"; break;

  case ONIGERR_UNDEFINED_GROUP_OPTION:

    p = "undefined group option"; break;

  case ONIGERR_INVALID_POSIX_BRACKET_TYPE:

    p = "invalid POSIX bracket type"; break;

  case ONIGERR_INVALID_LOOK_BEHIND_PATTERN:

    p = "invalid pattern in look-behind"; break;

  case ONIGERR_INVALID_REPEAT_RANGE_PATTERN:

    p = "invalid repeat range {lower,upper}"; break;

  case ONIGERR_INVALID_CONDITION_PATTERN:

    p = "invalid conditional pattern"; break;

  case ONIGERR_TOO_BIG_NUMBER:

    p = "too big number"; break;

  case ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE:

    p = "too big number for repeat range"; break;

  case ONIGERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE:

    p = "upper is smaller than lower in repeat range"; break;

  case ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS:

    p = "empty range in char class"; break;

#if 0

  case ONIGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE:

    p = "mismatch multibyte code length in char-class range"; break;

#endif

  case ONIGERR_TOO_MANY_MULTI_BYTE_RANGES:

    p = "too many multibyte code ranges are specified"; break;

  case ONIGERR_TOO_SHORT_MULTI_BYTE_STRING:

    p = "too short multibyte code string"; break;

#if 0

  case ONIGERR_TOO_BIG_BACKREF_NUMBER:

    p = "too big backref number"; break;

#endif

  case ONIGERR_INVALID_BACKREF:

#ifdef USE_NAMED_GROUP

    p = "invalid backref number/name"; break;

#else

    p = "invalid backref number"; break;

#endif

  case ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED:

    p = "numbered backref/call is not allowed. (use name)"; break;

  case ONIGERR_TOO_SHORT_DIGITS:

    p = "too short digits"; break;

  case ONIGERR_TOO_LONG_WIDE_CHAR_VALUE:

    p = "too long wide-char value"; break;

  case ONIGERR_EMPTY_GROUP_NAME:

    p = "group name is empty"; break;

  case ONIGERR_INVALID_GROUP_NAME:

    p = "invalid group name <%n>"; break;

  case ONIGERR_INVALID_CHAR_IN_GROUP_NAME:

#ifdef USE_NAMED_GROUP

    p = "invalid char in group name <%n>"; break;

#else

    p = "invalid char in group number <%n>"; break;

#endif

  case ONIGERR_UNDEFINED_NAME_REFERENCE:

    p = "undefined name <%n> reference"; break;

  case ONIGERR_UNDEFINED_GROUP_REFERENCE:

    p = "undefined group <%n> reference"; break;

  case ONIGERR_MULTIPLEX_DEFINED_NAME:

    p = "multiplex defined name <%n>"; break;

  case ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL:

    p = "multiplex definition name <%n> call"; break;

  case ONIGERR_NEVER_ENDING_RECURSION:

    p = "never ending recursion"; break;

#ifdef USE_CAPTURE_HISTORY

  case ONIGERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY:

    p = "group number is too big for capture history"; break;

#endif

  case ONIGERR_INVALID_CHAR_PROPERTY_NAME:

    p = "invalid character property name {%n}"; break;

  case ONIGERR_TOO_MANY_CAPTURE_GROUPS:

    p = "too many capture groups are specified"; break;

  case ONIGERR_INVALID_CODE_POINT_VALUE:

    p = "invalid code point value"; break;

  case ONIGERR_TOO_BIG_WIDE_CHAR_VALUE:

    p = "too big wide-char value"; break;

  case ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION:

    p = "not supported encoding combination"; break;

  case ONIGERR_INVALID_COMBINATION_OF_OPTIONS:

    p = "invalid combination of options"; break;

  default:

    p = "undefined error code"; break;

  }

  return (UChar* )p;

}

static void sprint_byte(char* s, unsigned int v)

{

  xsnprintf(s, 3, "%02x", (v & 0377));

}

static void sprint_byte_with_x(char* s, unsigned int v)

{

  xsnprintf(s, 5, "\\x%02x", (v & 0377));

}

static int to_ascii(OnigEncoding enc, UChar *s, UChar *end,

        UChar buf[], int buf_size, int *is_over)

{

  int len;

  UChar *p;

  OnigCodePoint code;

  if (ONIGENC_MBC_MINLEN(enc) > 1) {

    p = s;

    len = 0;

    while (p < end) {

      code = ONIGENC_MBC_TO_CODE(enc, p, end);

      if (code >= 0x80) {

  if (code > 0xffff && len + 10 <= buf_size) {

    sprint_byte_with_x((char*)(&(buf[len])), (unsigned int)(code >> 24));

    sprint_byte((char*)(&(buf[len+4])),      (unsigned int)(code >> 16));

    sprint_byte((char*)(&(buf[len+6])),      (unsigned int)(code >>  8));

    sprint_byte((char*)(&(buf[len+8])),      (unsigned int)code);

    len += 10;

  }

  else if (len + 6 <= buf_size) {

    sprint_byte_with_x((char*)(&(buf[len])), (unsigned int)(code >> 8));

    sprint_byte((char*)(&(buf[len+4])),      (unsigned int)code);

    len += 6;

  }

  else {

    break;

  }

      }

      else {

  buf[len++] = (UChar )code;

      }

      p += enclen(enc, p, end);

      if (len >= buf_size) break;

    }

    *is_over = ((p < end) ? 1 : 0);

  }

  else {

    len = (int )MIN((end - s), buf_size);

    xmemcpy(buf, s, (size_t )len);

    *is_over = ((buf_size < (end - s)) ? 1 : 0);

  }

  return len;

}

/* < ONIG_MAX_ERROR_MESSAGE_LEN - max length of messages with %n */

#define MAX_ERROR_PAR_LEN   50

extern int

onig_error_code_to_str(UChar* s, OnigPosition code, ...)

{

  UChar *p, *q;

  OnigErrorInfo* einfo;

  size_t len;

  int is_over;

  UChar parbuf[MAX_ERROR_PAR_LEN];

  va_list vargs;

  va_start(vargs, code);

  switch (code) {

  case ONIGERR_UNDEFINED_NAME_REFERENCE:

  case ONIGERR_UNDEFINED_GROUP_REFERENCE:

  case ONIGERR_MULTIPLEX_DEFINED_NAME:

  case ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL:

  case ONIGERR_INVALID_GROUP_NAME:

  case ONIGERR_INVALID_CHAR_IN_GROUP_NAME:

  case ONIGERR_INVALID_CHAR_PROPERTY_NAME:

    einfo = va_arg(vargs, OnigErrorInfo*);

    len = to_ascii(einfo->enc, einfo->par, einfo->par_end,

       parbuf, MAX_ERROR_PAR_LEN - 3, &is_over);

    q = onig_error_code_to_format(code);

    p = s;

    while (*q != '\0') {

      if (*q == '%') {

  q++;

  if (*q == 'n') { /* '%n': name */

    xmemcpy(p, parbuf, len);

    p += len;

    if (is_over != 0) {

      xmemcpy(p, "...", 3);

      p += 3;

    }

    q++;

  }

  else

    goto normal_char;

      }

      else {

      normal_char:

  *p++ = *q++;

      }

    }

    *p = '\0';

    len = p - s;

    break;

  default:

    q = onig_error_code_to_format(code);

    if (q) {

      len = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, q);

      xmemcpy(s, q, len);

    } else {

      len = 0;

    }

    s[len] = '\0';

    break;

  }

  va_end(vargs);

  return (int )len;

}

void

onig_vsnprintf_with_pattern(UChar buf[], int bufsize, OnigEncoding enc,

                           UChar* pat, UChar* pat_end, const UChar *fmt, va_list args)

{

  size_t need;

  int n, len;

  UChar *p, *s, *bp;

  UChar bs[6];

  n = xvsnprintf((char* )buf, bufsize, (const char* )fmt, args);

  need = (pat_end - pat) * 4 + 4;

  if (n + need < (size_t )bufsize) {

    static const char sep[] = ": /";

    memcpy((char* )buf + n, sep, sizeof(sep));

    s = buf + onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, buf);

    p = pat;

    while (p < pat_end) {

      if (ONIGENC_IS_MBC_HEAD(enc, p, pat_end)) {

        len = enclen(enc, p, pat_end);

        if (ONIGENC_MBC_MINLEN(enc) == 1) {

          while (len-- > 0) *s++ = *p++;

        }

        else { /* for UTF16/32 */

          int blen;

          while (len-- > 0) {

            sprint_byte_with_x((char* )bs, (unsigned int )(*p++));

            blen = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, bs);

            bp = bs;

            while (blen-- > 0) *s++ = *bp++;

          }

        }

      }

      else if (*p == '\\') {

  *s++ = *p++;

  len = enclen(enc, p, pat_end);

  while (len-- > 0) *s++ = *p++;

      }

      else if (*p == '/') {

  *s++ = (unsigned char )'\\';

  *s++ = *p++;

      }

      else if (!ONIGENC_IS_CODE_PRINT(enc, *p) &&

         (!ONIGENC_IS_CODE_SPACE(enc, *p) ||

                ONIGENC_IS_CODE_CNTRL(enc, *p))) {

  sprint_byte_with_x((char* )bs, (unsigned int )(*p++));

  len = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, bs);

        bp = bs;

  while (len-- > 0) *s++ = *bp++;

      }

      else {

  *s++ = *p++;

      }

    }

    *s++ = '/';

    *s   = '\0';

  }

}

#if 0 /* unused */

void

onig_snprintf_with_pattern(UChar buf[], int bufsize, OnigEncoding enc,

                           UChar* pat, UChar* pat_end, const UChar *fmt, ...)

{

  va_list args;

  va_start(args, fmt);

  onig_vsnprintf_with_pattern(buf, bufsize, enc,

    pat, pat_end, fmt, args);

  va_end(args);

}

#endif