src/utf8proc/utf8proc.c - master - auroraos/mirror_libpostal

src/utf8proc/utf8proc.c
641 строка23 KB
AeroXuk
Removing EXPORT statements from all source files and most header files, leaving only the exports for the main API in libpostal.h. Modified Makefiles so that all the test apps build without having extra functions exported from libpostal.
25 ноя 2017, 07:35
25 ноя 2017, 07:3526ac9ab
/* -*- mode: c; c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil -*- */
/*
 *  Copyright (c) 2009 Public Software Group e. V., Berlin, Germany
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"),
 *  to deal in the Software without restriction, including without limitation
 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *  and/or sell copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 *  DEALINGS IN THE SOFTWARE.
 */

/*
 *  This library contains derived data from a modified version of the
 *  Unicode data files.
 *
 *  The original data files are available at
 *  http://www.unicode.org/Public/UNIDATA/
 *
 *  Please notice the copyright statement in the file "utf8proc_data.c".
 */


/*
 *  File name:    utf8proc.c
 *
 *  Description:
 *  Implementation of libutf8proc.
 */


#include "utf8proc.h"
#include "utf8proc_data.c"


const utf8proc_int8_t utf8proc_utf8class[256] = {
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
  4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0 };

#define UTF8PROC_HANGUL_SBASE 0xAC00
#define UTF8PROC_HANGUL_LBASE 0x1100
#define UTF8PROC_HANGUL_VBASE 0x1161
#define UTF8PROC_HANGUL_TBASE 0x11A7
#define UTF8PROC_HANGUL_LCOUNT 19
#define UTF8PROC_HANGUL_VCOUNT 21
#define UTF8PROC_HANGUL_TCOUNT 28
#define UTF8PROC_HANGUL_NCOUNT 588
#define UTF8PROC_HANGUL_SCOUNT 11172
/* END is exclusive */
#define UTF8PROC_HANGUL_L_START  0x1100
#define UTF8PROC_HANGUL_L_END    0x115A
#define UTF8PROC_HANGUL_L_FILLER 0x115F
#define UTF8PROC_HANGUL_V_START  0x1160
#define UTF8PROC_HANGUL_V_END    0x11A3
#define UTF8PROC_HANGUL_T_START  0x11A8
#define UTF8PROC_HANGUL_T_END    0x11FA
#define UTF8PROC_HANGUL_S_START  0xAC00
#define UTF8PROC_HANGUL_S_END    0xD7A4

/* Should follow semantic-versioning rules (semver.org) based on API
   compatibility.  (Note that the shared-library version number will
   be different, being based on ABI compatibility.): */
#define STRINGIZEx(x) #x
#define STRINGIZE(x) STRINGIZEx(x)
const char *utf8proc_version(void) {
  return STRINGIZE(UTF8PROC_VERSION_MAJOR) "." STRINGIZE(UTF8PROC_VERSION_MINOR) "." STRINGIZE(UTF8PROC_VERSION_PATCH) "";
}

const char *utf8proc_errmsg(utf8proc_ssize_t errcode) {
  switch (errcode) {
    case UTF8PROC_ERROR_NOMEM:
    return "Memory for processing UTF-8 data could not be allocated.";
    case UTF8PROC_ERROR_OVERFLOW:
    return "UTF-8 string is too long to be processed.";
    case UTF8PROC_ERROR_INVALIDUTF8:
    return "Invalid UTF-8 string";
    case UTF8PROC_ERROR_NOTASSIGNED:
    return "Unassigned Unicode code point found in UTF-8 string.";
    case UTF8PROC_ERROR_INVALIDOPTS:
    return "Invalid options for UTF-8 processing chosen.";
    default:
    return "An unknown error occurred while processing UTF-8 data.";
  }
}

#define utf_cont(ch)  (((ch) & 0xc0) == 0x80)
utf8proc_ssize_t utf8proc_iterate(
  const utf8proc_uint8_t *str, utf8proc_ssize_t strlen, utf8proc_int32_t *dst
) {
  utf8proc_uint32_t uc;
  const utf8proc_uint8_t *end;

  *dst = -1;
  if (!strlen) return 0;
  end = str + ((strlen < 0) ? 4 : strlen);
  uc = *str++;
  if (uc < 0x80) {
    *dst = uc;
    return 1;
  }
  // Must be between 0xc2 and 0xf4 inclusive to be valid
  if ((uc - 0xc2) > (0xf4-0xc2)) return UTF8PROC_ERROR_INVALIDUTF8;
  if (uc < 0xe0) {         // 2-byte sequence
     // Must have valid continuation character
     if (!utf_cont(*str)) return UTF8PROC_ERROR_INVALIDUTF8;
     *dst = ((uc & 0x1f)<<6) | (*str & 0x3f);
     return 2;
  }
  if (uc < 0xf0) {        // 3-byte sequence
     if ((str + 1 >= end) || !utf_cont(*str) || !utf_cont(str[1]))
        return UTF8PROC_ERROR_INVALIDUTF8;
     // Check for surrogate chars
     if (uc == 0xed && *str > 0x9f)
         return UTF8PROC_ERROR_INVALIDUTF8;
     uc = ((uc & 0xf)<<12) | ((*str & 0x3f)<<6) | (str[1] & 0x3f);
     if (uc < 0x800)
         return UTF8PROC_ERROR_INVALIDUTF8;
     *dst = uc;
     return 3;
  }
  // 4-byte sequence
  // Must have 3 valid continuation characters
  if ((str + 2 >= end) || !utf_cont(*str) || !utf_cont(str[1]) || !utf_cont(str[2]))
     return UTF8PROC_ERROR_INVALIDUTF8;
  // Make sure in correct range (0x10000 - 0x10ffff)
  if (uc == 0xf0) {
    if (*str < 0x90) return UTF8PROC_ERROR_INVALIDUTF8;
  } else if (uc == 0xf4) {
    if (*str > 0x8f) return UTF8PROC_ERROR_INVALIDUTF8;
  }
  *dst = ((uc & 7)<<18) | ((*str & 0x3f)<<12) | ((str[1] & 0x3f)<<6) | (str[2] & 0x3f);
  return 4;
}

utf8proc_bool utf8proc_codepoint_valid(utf8proc_int32_t uc) {
    return (((utf8proc_uint32_t)uc)-0xd800 > 0x07ff) && ((utf8proc_uint32_t)uc < 0x110000);
}

utf8proc_ssize_t utf8proc_encode_char(utf8proc_int32_t uc, utf8proc_uint8_t *dst) {
  if (uc < 0x00) {
    return 0;
  } else if (uc < 0x80) {
    dst[0] = uc;
    return 1;
  } else if (uc < 0x800) {
    dst[0] = 0xC0 + (uc >> 6);
    dst[1] = 0x80 + (uc & 0x3F);
    return 2;
  // Note: we allow encoding 0xd800-0xdfff here, so as not to change
  // the API, however, these are actually invalid in UTF-8
  } else if (uc < 0x10000) {
    dst[0] = 0xE0 + (uc >> 12);
    dst[1] = 0x80 + ((uc >> 6) & 0x3F);
    dst[2] = 0x80 + (uc & 0x3F);
    return 3;
  } else if (uc < 0x110000) {
    dst[0] = 0xF0 + (uc >> 18);
    dst[1] = 0x80 + ((uc >> 12) & 0x3F);
    dst[2] = 0x80 + ((uc >> 6) & 0x3F);
    dst[3] = 0x80 + (uc & 0x3F);
    return 4;
  } else return 0;
}

/* internal "unsafe" version that does not check whether uc is in range */
static utf8proc_ssize_t unsafe_encode_char(utf8proc_int32_t uc, utf8proc_uint8_t *dst) {
   if (uc < 0x00) {
      return 0;
   } else if (uc < 0x80) {
      dst[0] = uc;
      return 1;
   } else if (uc < 0x800) {
      dst[0] = 0xC0 + (uc >> 6);
      dst[1] = 0x80 + (uc & 0x3F);
      return 2;
   } else if (uc == 0xFFFF) {
       dst[0] = 0xFF;
       return 1;
   } else if (uc == 0xFFFE) {
       dst[0] = 0xFE;
       return 1;
   } else if (uc < 0x10000) {
      dst[0] = 0xE0 + (uc >> 12);
      dst[1] = 0x80 + ((uc >> 6) & 0x3F);
      dst[2] = 0x80 + (uc & 0x3F);
      return 3;
   } else if (uc < 0x110000) {
      dst[0] = 0xF0 + (uc >> 18);
      dst[1] = 0x80 + ((uc >> 12) & 0x3F);
      dst[2] = 0x80 + ((uc >> 6) & 0x3F);
      dst[3] = 0x80 + (uc & 0x3F);
      return 4;
   } else return 0;
}

/* internal "unsafe" version that does not check whether uc is in range */
static const utf8proc_property_t *unsafe_get_property(utf8proc_int32_t uc) {
  /* ASSERT: uc >= 0 && uc < 0x110000 */
  return utf8proc_properties + (
    utf8proc_stage2table[
      utf8proc_stage1table[uc >> 8] + (uc & 0xFF)
    ]
  );
}

const utf8proc_property_t *utf8proc_get_property(utf8proc_int32_t uc) {
  return uc < 0 || uc >= 0x110000 ? utf8proc_properties : unsafe_get_property(uc);
}

/* return whether there is a grapheme break between boundclasses lbc and tbc */
static utf8proc_bool grapheme_break(int lbc, int tbc) {
  return 
    (lbc == UTF8PROC_BOUNDCLASS_START) ? true :
    (lbc == UTF8PROC_BOUNDCLASS_CR &&
     tbc == UTF8PROC_BOUNDCLASS_LF) ? false :
    (lbc >= UTF8PROC_BOUNDCLASS_CR && lbc <= UTF8PROC_BOUNDCLASS_CONTROL) ? true :
    (tbc >= UTF8PROC_BOUNDCLASS_CR && tbc <= UTF8PROC_BOUNDCLASS_CONTROL) ? true :
    (tbc == UTF8PROC_BOUNDCLASS_EXTEND) ? false :
    (lbc == UTF8PROC_BOUNDCLASS_L &&
     (tbc == UTF8PROC_BOUNDCLASS_L ||
      tbc == UTF8PROC_BOUNDCLASS_V ||
      tbc == UTF8PROC_BOUNDCLASS_LV ||
      tbc == UTF8PROC_BOUNDCLASS_LVT)) ? false :
    ((lbc == UTF8PROC_BOUNDCLASS_LV ||
      lbc == UTF8PROC_BOUNDCLASS_V) &&
     (tbc == UTF8PROC_BOUNDCLASS_V ||
      tbc == UTF8PROC_BOUNDCLASS_T)) ? false :
    ((lbc == UTF8PROC_BOUNDCLASS_LVT ||
      lbc == UTF8PROC_BOUNDCLASS_T) &&
     tbc == UTF8PROC_BOUNDCLASS_T) ? false :
    (lbc == UTF8PROC_BOUNDCLASS_REGIONAL_INDICATOR &&
     tbc == UTF8PROC_BOUNDCLASS_REGIONAL_INDICATOR) ? false :
    (tbc != UTF8PROC_BOUNDCLASS_SPACINGMARK);
}

/* return whether there is a grapheme break between codepoints c1 and c2 */
utf8proc_bool utf8proc_grapheme_break(utf8proc_int32_t c1, utf8proc_int32_t c2) {
  return grapheme_break(utf8proc_get_property(c1)->boundclass,
                        utf8proc_get_property(c2)->boundclass);
}

utf8proc_int32_t utf8proc_tolower(utf8proc_int32_t c)
{
  utf8proc_int32_t cl = utf8proc_get_property(c)->lowercase_mapping;
  return cl >= 0 ? cl : c;
}

utf8proc_int32_t utf8proc_toupper(utf8proc_int32_t c)
{
  utf8proc_int32_t cu = utf8proc_get_property(c)->uppercase_mapping;
  return cu >= 0 ? cu : c;
}

/* return a character width analogous to wcwidth (except portable and
   hopefully less buggy than most system wcwidth functions). */
int utf8proc_charwidth(utf8proc_int32_t c) {
  return utf8proc_get_property(c)->charwidth;
}

utf8proc_category_t utf8proc_category(utf8proc_int32_t c) {
  return utf8proc_get_property(c)->category;
}

const char *utf8proc_category_string(utf8proc_int32_t c) {
  static const char s[][3] = {"Cn","Lu","Ll","Lt","Lm","Lo","Mn","Mc","Me","Nd","Nl","No","Pc","Pd","Ps","Pe","Pi","Pf","Po","Sm","Sc","Sk","So","Zs","Zl","Zp","Cc","Cf","Cs","Co"};
  return s[utf8proc_category(c)];
}

#define utf8proc_decompose_lump(replacement_uc) \
  return utf8proc_decompose_char((replacement_uc), dst, bufsize, \
  options & ~UTF8PROC_LUMP, last_boundclass)

utf8proc_ssize_t utf8proc_decompose_char(utf8proc_int32_t uc, utf8proc_int32_t *dst, utf8proc_ssize_t bufsize, utf8proc_option_t options, int *last_boundclass) {
  const utf8proc_property_t *property;
  utf8proc_propval_t category;
  utf8proc_int32_t hangul_sindex;
  if (uc < 0 || uc >= 0x110000) return UTF8PROC_ERROR_NOTASSIGNED;
  property = unsafe_get_property(uc);
  category = property->category;
  hangul_sindex = uc - UTF8PROC_HANGUL_SBASE;
  if (options & (UTF8PROC_COMPOSE|UTF8PROC_DECOMPOSE)) {
    if (hangul_sindex >= 0 && hangul_sindex < UTF8PROC_HANGUL_SCOUNT) {
      utf8proc_int32_t hangul_tindex;
      if (bufsize >= 1) {
        dst[0] = UTF8PROC_HANGUL_LBASE +
          hangul_sindex / UTF8PROC_HANGUL_NCOUNT;
        if (bufsize >= 2) dst[1] = UTF8PROC_HANGUL_VBASE +
          (hangul_sindex % UTF8PROC_HANGUL_NCOUNT) / UTF8PROC_HANGUL_TCOUNT;
      }
      hangul_tindex = hangul_sindex % UTF8PROC_HANGUL_TCOUNT;
      if (!hangul_tindex) return 2;
      if (bufsize >= 3) dst[2] = UTF8PROC_HANGUL_TBASE + hangul_tindex;
      return 3;
    }
  }
  if (options & UTF8PROC_REJECTNA) {
    if (!category) return UTF8PROC_ERROR_NOTASSIGNED;
  }
  if (options & UTF8PROC_IGNORE) {
    if (property->ignorable) return 0;
  }
  if (options & UTF8PROC_LUMP) {
    if (category == UTF8PROC_CATEGORY_ZS) utf8proc_decompose_lump(0x0020);
    if (uc == 0x2018 || uc == 0x2019 || uc == 0x02BC || uc == 0x02C8)
      utf8proc_decompose_lump(0x0027);
    if (category == UTF8PROC_CATEGORY_PD || uc == 0x2212)
      utf8proc_decompose_lump(0x002D);
    if (uc == 0x2044 || uc == 0x2215) utf8proc_decompose_lump(0x002F);
    if (uc == 0x2236) utf8proc_decompose_lump(0x003A);
    if (uc == 0x2039 || uc == 0x2329 || uc == 0x3008)
      utf8proc_decompose_lump(0x003C);
    if (uc == 0x203A || uc == 0x232A || uc == 0x3009)
      utf8proc_decompose_lump(0x003E);
    if (uc == 0x2216) utf8proc_decompose_lump(0x005C);
    if (uc == 0x02C4 || uc == 0x02C6 || uc == 0x2038 || uc == 0x2303)
      utf8proc_decompose_lump(0x005E);
    if (category == UTF8PROC_CATEGORY_PC || uc == 0x02CD)
      utf8proc_decompose_lump(0x005F);
    if (uc == 0x02CB) utf8proc_decompose_lump(0x0060);
    if (uc == 0x2223) utf8proc_decompose_lump(0x007C);
    if (uc == 0x223C) utf8proc_decompose_lump(0x007E);
    if ((options & UTF8PROC_NLF2LS) && (options & UTF8PROC_NLF2PS)) {
      if (category == UTF8PROC_CATEGORY_ZL ||
          category == UTF8PROC_CATEGORY_ZP)
        utf8proc_decompose_lump(0x000A);
    }
  }
  if (options & UTF8PROC_STRIPMARK) {
    if (category == UTF8PROC_CATEGORY_MN ||
      category == UTF8PROC_CATEGORY_MC ||
      category == UTF8PROC_CATEGORY_ME) return 0;
  }
  if (options & UTF8PROC_CASEFOLD) {
    if (property->casefold_mapping) {
      const utf8proc_int32_t *casefold_entry;
      utf8proc_ssize_t written = 0;
      for (casefold_entry = property->casefold_mapping;
          *casefold_entry >= 0; casefold_entry++) {
        written += utf8proc_decompose_char(*casefold_entry, dst+written,
          (bufsize > written) ? (bufsize - written) : 0, options,
          last_boundclass);
        if (written < 0) return UTF8PROC_ERROR_OVERFLOW;
      }
      return written;
    }
  }
  if (options & (UTF8PROC_COMPOSE|UTF8PROC_DECOMPOSE)) {
    if (property->decomp_mapping &&
        (!property->decomp_type || (options & UTF8PROC_COMPAT))) {
      const utf8proc_int32_t *decomp_entry;
      utf8proc_ssize_t written = 0;
      for (decomp_entry = property->decomp_mapping;
          *decomp_entry >= 0; decomp_entry++) {
        written += utf8proc_decompose_char(*decomp_entry, dst+written,
          (bufsize > written) ? (bufsize - written) : 0, options,
        last_boundclass);
        if (written < 0) return UTF8PROC_ERROR_OVERFLOW;
      }
      return written;
    }
  }
  if (options & UTF8PROC_CHARBOUND) {
    utf8proc_bool boundary;
    int tbc = property->boundclass;
    boundary = grapheme_break(*last_boundclass, tbc);
    *last_boundclass = tbc;
    if (boundary) {
      if (bufsize >= 1) dst[0] = 0xFFFF;
      if (bufsize >= 2) dst[1] = uc;
      return 2;
    }
  }
  if (bufsize >= 1) *dst = uc;
  return 1;
}

utf8proc_ssize_t utf8proc_decompose(
  const utf8proc_uint8_t *str, utf8proc_ssize_t strlen,
  utf8proc_int32_t *buffer, utf8proc_ssize_t bufsize, utf8proc_option_t options
) {
  /* strlen will be ignored, if UTF8PROC_NULLTERM is set in options */
  utf8proc_ssize_t wpos = 0;
  if ((options & UTF8PROC_COMPOSE) && (options & UTF8PROC_DECOMPOSE))
    return UTF8PROC_ERROR_INVALIDOPTS;
  if ((options & UTF8PROC_STRIPMARK) &&
      !(options & UTF8PROC_COMPOSE) && !(options & UTF8PROC_DECOMPOSE))
    return UTF8PROC_ERROR_INVALIDOPTS;
  {
    utf8proc_int32_t uc;
    utf8proc_ssize_t rpos = 0;
    utf8proc_ssize_t decomp_result;
    int boundclass = UTF8PROC_BOUNDCLASS_START;
    while (1) {
      if (options & UTF8PROC_NULLTERM) {
        rpos += utf8proc_iterate(str + rpos, -1, &uc);
        /* checking of return value is not necessary,
           as 'uc' is < 0 in case of error */
        if (uc < 0) return UTF8PROC_ERROR_INVALIDUTF8;
        if (rpos < 0) return UTF8PROC_ERROR_OVERFLOW;
        if (uc == 0) break;
      } else {
        if (rpos >= strlen) break;
        rpos += utf8proc_iterate(str + rpos, strlen - rpos, &uc);
        if (uc < 0) return UTF8PROC_ERROR_INVALIDUTF8;
      }
      decomp_result = utf8proc_decompose_char(
        uc, buffer + wpos, (bufsize > wpos) ? (bufsize - wpos) : 0, options,
        &boundclass
      );
      if (decomp_result < 0) return decomp_result;
      wpos += decomp_result;
      /* prohibiting integer overflows due to too long strings: */
      if (wpos < 0 || wpos > SSIZE_MAX/sizeof(utf8proc_int32_t)/2)
        return UTF8PROC_ERROR_OVERFLOW;
    }
  }
  if ((options & (UTF8PROC_COMPOSE|UTF8PROC_DECOMPOSE)) && bufsize >= wpos) {
    utf8proc_ssize_t pos = 0;
    while (pos < wpos-1) {
      utf8proc_int32_t uc1, uc2;
      const utf8proc_property_t *property1, *property2;
      uc1 = buffer[pos];
      uc2 = buffer[pos+1];
      property1 = unsafe_get_property(uc1);
      property2 = unsafe_get_property(uc2);
      if (property1->combining_class > property2->combining_class &&
          property2->combining_class > 0) {
        buffer[pos] = uc2;
        buffer[pos+1] = uc1;
        if (pos > 0) pos--; else pos++;
      } else {
        pos++;
      }
    }
  }
  return wpos;
}

utf8proc_ssize_t utf8proc_reencode(utf8proc_int32_t *buffer, utf8proc_ssize_t length, utf8proc_option_t options) {
  /* UTF8PROC_NULLTERM option will be ignored, 'length' is never ignored
     ASSERT: 'buffer' has one spare byte of free space at the end! */
  if (options & (UTF8PROC_NLF2LS | UTF8PROC_NLF2PS | UTF8PROC_STRIPCC)) {
    utf8proc_ssize_t rpos;
    utf8proc_ssize_t wpos = 0;
    utf8proc_int32_t uc;
    for (rpos = 0; rpos < length; rpos++) {
      uc = buffer[rpos];
      if (uc == 0x000D && rpos < length-1 && buffer[rpos+1] == 0x000A) rpos++;
      if (uc == 0x000A || uc == 0x000D || uc == 0x0085 ||
          ((options & UTF8PROC_STRIPCC) && (uc == 0x000B || uc == 0x000C))) {
        if (options & UTF8PROC_NLF2LS) {
          if (options & UTF8PROC_NLF2PS) {
            buffer[wpos++] = 0x000A;
          } else {
            buffer[wpos++] = 0x2028;
          }
        } else {
          if (options & UTF8PROC_NLF2PS) {
            buffer[wpos++] = 0x2029;
          } else {
            buffer[wpos++] = 0x0020;
          }
        }
      } else if ((options & UTF8PROC_STRIPCC) &&
          (uc < 0x0020 || (uc >= 0x007F && uc < 0x00A0))) {
        if (uc == 0x0009) buffer[wpos++] = 0x0020;
      } else {
        buffer[wpos++] = uc;
      }
    }
    length = wpos;
  }
  if (options & UTF8PROC_COMPOSE) {
    utf8proc_int32_t *starter = NULL;
    utf8proc_int32_t current_char;
    const utf8proc_property_t *starter_property = NULL, *current_property;
    utf8proc_propval_t max_combining_class = -1;
    utf8proc_ssize_t rpos;
    utf8proc_ssize_t wpos = 0;
    utf8proc_int32_t composition;
    for (rpos = 0; rpos < length; rpos++) {
      current_char = buffer[rpos];
      current_property = unsafe_get_property(current_char);
      if (starter && current_property->combining_class > max_combining_class) {
        /* combination perhaps possible */
        utf8proc_int32_t hangul_lindex;
        utf8proc_int32_t hangul_sindex;
        hangul_lindex = *starter - UTF8PROC_HANGUL_LBASE;
        if (hangul_lindex >= 0 && hangul_lindex < UTF8PROC_HANGUL_LCOUNT) {
          utf8proc_int32_t hangul_vindex;
          hangul_vindex = current_char - UTF8PROC_HANGUL_VBASE;
          if (hangul_vindex >= 0 && hangul_vindex < UTF8PROC_HANGUL_VCOUNT) {
            *starter = UTF8PROC_HANGUL_SBASE +
              (hangul_lindex * UTF8PROC_HANGUL_VCOUNT + hangul_vindex) *
              UTF8PROC_HANGUL_TCOUNT;
            starter_property = NULL;
            continue;
          }
        }
        hangul_sindex = *starter - UTF8PROC_HANGUL_SBASE;
        if (hangul_sindex >= 0 && hangul_sindex < UTF8PROC_HANGUL_SCOUNT &&
            (hangul_sindex % UTF8PROC_HANGUL_TCOUNT) == 0) {
          utf8proc_int32_t hangul_tindex;
          hangul_tindex = current_char - UTF8PROC_HANGUL_TBASE;
          if (hangul_tindex >= 0 && hangul_tindex < UTF8PROC_HANGUL_TCOUNT) {
            *starter += hangul_tindex;
            starter_property = NULL;
            continue;
          }
        }
        if (!starter_property) {
          starter_property = unsafe_get_property(*starter);
        }
        if (starter_property->comb1st_index >= 0 &&
            current_property->comb2nd_index >= 0) {
          composition = utf8proc_combinations[
            starter_property->comb1st_index +
            current_property->comb2nd_index
          ];
          if (composition >= 0 && (!(options & UTF8PROC_STABLE) ||
              !(unsafe_get_property(composition)->comp_exclusion))) {
            *starter = composition;
            starter_property = NULL;
            continue;
          }
        }
      }
      buffer[wpos] = current_char;
      if (current_property->combining_class) {
        if (current_property->combining_class > max_combining_class) {
          max_combining_class = current_property->combining_class;
        }
      } else {
        starter = buffer + wpos;
        starter_property = NULL;
        max_combining_class = -1;
      }
      wpos++;
    }
    length = wpos;
  }
  {
    utf8proc_ssize_t rpos, wpos = 0;
    utf8proc_int32_t uc;
    if (options & UTF8PROC_CHARBOUND) {
        for (rpos = 0; rpos < length; rpos++) {
            uc = buffer[rpos];
            wpos += unsafe_encode_char(uc, ((utf8proc_uint8_t *)buffer) + wpos);
        }
    } else {
        for (rpos = 0; rpos < length; rpos++) {
            uc = buffer[rpos];
            wpos += utf8proc_encode_char(uc, ((utf8proc_uint8_t *)buffer) + wpos);
        }
    }
    ((utf8proc_uint8_t *)buffer)[wpos] = 0;
    return wpos;
  }
}

utf8proc_ssize_t utf8proc_map(
  const utf8proc_uint8_t *str, utf8proc_ssize_t strlen, utf8proc_uint8_t **dstptr, utf8proc_option_t options
) {
  utf8proc_int32_t *buffer;
  utf8proc_ssize_t result;
  *dstptr = NULL;
  result = utf8proc_decompose(str, strlen, NULL, 0, options);
  if (result < 0) return result;
  buffer = (utf8proc_int32_t *) malloc(result * sizeof(utf8proc_int32_t) + 1);
  if (!buffer) return UTF8PROC_ERROR_NOMEM;
  result = utf8proc_decompose(str, strlen, buffer, result, options);
  if (result < 0) {
    free(buffer);
    return result;
  }
  result = utf8proc_reencode(buffer, result, options);
  if (result < 0) {
    free(buffer);
    return result;
  }
  {
    utf8proc_int32_t *newptr;
    newptr = (utf8proc_int32_t *) realloc(buffer, (size_t)result+1);
    if (newptr) buffer = newptr;
  }
  *dstptr = (utf8proc_uint8_t *)buffer;
  return result;
}

utf8proc_uint8_t *utf8proc_NFD(const utf8proc_uint8_t *str) {
  utf8proc_uint8_t *retval;
  utf8proc_map(str, 0, &retval, UTF8PROC_NULLTERM | UTF8PROC_STABLE |
    UTF8PROC_DECOMPOSE);
  return retval;
}

utf8proc_uint8_t *utf8proc_NFC(const utf8proc_uint8_t *str) {
  utf8proc_uint8_t *retval;
  utf8proc_map(str, 0, &retval, UTF8PROC_NULLTERM | UTF8PROC_STABLE |
    UTF8PROC_COMPOSE);
  return retval;
}

utf8proc_uint8_t *utf8proc_NFKD(const utf8proc_uint8_t *str) {
  utf8proc_uint8_t *retval;
  utf8proc_map(str, 0, &retval, UTF8PROC_NULLTERM | UTF8PROC_STABLE |
    UTF8PROC_DECOMPOSE | UTF8PROC_COMPAT);
  return retval;
}

utf8proc_uint8_t *utf8proc_NFKC(const utf8proc_uint8_t *str) {
  utf8proc_uint8_t *retval;
  utf8proc_map(str, 0, &retval, UTF8PROC_NULLTERM | UTF8PROC_STABLE |
    UTF8PROC_COMPOSE | UTF8PROC_COMPAT);
  return retval;
}