tree-sitter-svelte/src/uthash.h

#ifndef SHEREDOM_HASHMAP_H_INCLUDED
#define SHEREDOM_HASHMAP_H_INCLUDED

#include "tag.h"
#include "allocator.h"

#if defined(_MSC_VER)
// Workaround a bug in the MSVC runtime where it uses __cplusplus when not
// defined.
#pragma warning(push, 0)
#pragma warning(disable : 4668)
#endif
#include <stdlib.h>
#include <string.h>

#if (defined(_MSC_VER) && defined(__AVX__)) ||                                 \
    (!defined(_MSC_VER) && defined(__SSE4_2__))
#define HASHMAP_SSE42
#endif

#if defined(HASHMAP_SSE42)
#include <nmmintrin.h>
#endif

#if defined(_MSC_VER)
#pragma warning(pop)
#endif

#if defined(_MSC_VER)
#pragma warning(push)
/* Stop MSVC complaining about unreferenced functions */
#pragma warning(disable : 4505)
/* Stop MSVC complaining about not inlining functions */
#pragma warning(disable : 4710)
/* Stop MSVC complaining about inlining functions! */
#pragma warning(disable : 4711)
#elif defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
#endif

#if defined(_MSC_VER)
#define HASHMAP_USED
#elif defined(__GNUC__)
#define HASHMAP_USED __attribute__((used))
#else
#define HASHMAP_USED
#endif

/* We need to keep keys and values. */
struct hashmap_element_s {
  const char *key;
  unsigned key_len;
  int in_use;
  TagType data;
};

/* A hashmap has some maximum size and current size, as well as the data to
 * hold. */
struct hashmap_s {
  unsigned table_size;
  unsigned size;
  struct hashmap_element_s *data;
  za_Allocator* A;
};

#define HASHMAP_MAX_CHAIN_LENGTH (8)

#if defined(__cplusplus)
extern "C" {
#endif

/// @brief Create a hashmap.
/// @param initial_size The initial size of the hashmap. Must be a power of two.
/// @param out_hashmap The storage for the created hashmap.
/// @return On success 0 is returned.
///
/// Note that the initial size of the hashmap must be a power of two, and
/// creation of the hashmap will fail if this is not the case.
static int hashmap_create(za_Allocator* A, const unsigned initial_size,
                          struct hashmap_s *const out_hashmap) HASHMAP_USED;

/// @brief Put an element into the hashmap.
/// @param hashmap The hashmap to insert into.
/// @param key The string key to use.
/// @param len The length of the string key.
/// @param value The value to insert.
/// @return On success 0 is returned.
///
/// The key string slice is not copied when creating the hashmap entry, and thus
/// must remain a valid pointer until the hashmap entry is removed or the
/// hashmap is destroyed.
static int hashmap_put(struct hashmap_s *const hashmap, const char *const key,
                       const unsigned len, const TagType value) HASHMAP_USED;

/// @brief Get an element from the hashmap.
/// @param hashmap The hashmap to get from.
/// @param key The string key to use.
/// @param len The length of the string key.
/// @return The previously set element, or NULL if none exists.
static TagType hashmap_get(const struct hashmap_s *const hashmap,
                         const char *const key,
                         const unsigned len) HASHMAP_USED;

/// @brief Remove an element from the hashmap.
/// @param hashmap The hashmap to remove from.
/// @param key The string key to use.
/// @param len The length of the string key.
/// @return On success 0 is returned.
static int hashmap_remove(struct hashmap_s *const hashmap,
                          const char *const key,
                          const unsigned len) HASHMAP_USED;

/// @brief Remove an element from the hashmap.
/// @param hashmap The hashmap to remove from.
/// @param key The string key to use.
/// @param len The length of the string key.
/// @return On success the original stored key pointer is returned, on failure
/// NULL is returned.
static const char *
hashmap_remove_and_return_key(struct hashmap_s *const hashmap,
                              const char *const key,
                              const unsigned len) HASHMAP_USED;

/// @brief Iterate over all the elements in a hashmap.
/// @param hashmap The hashmap to iterate over.
/// @param f The function pointer to call on each element.
/// @param context The context to pass as the first argument to f.
/// @return If the entire hashmap was iterated then 0 is returned. Otherwise if
/// the callback function f returned non-zero then non-zero is returned.
static int hashmap_iterate(const struct hashmap_s *const hashmap,
                           int (*f)(void *const context, const TagType value),
                           void *const context) HASHMAP_USED;

/// @brief Iterate over all the elements in a hashmap.
/// @param hashmap The hashmap to iterate over.
/// @param f The function pointer to call on each element.
/// @param context The context to pass as the first argument to f.
/// @return If the entire hashmap was iterated then 0 is returned.
/// Otherwise if the callback function f returned positive then the positive
/// value is returned.  If the callback function returns -1, the current item
/// is removed and iteration continues.
static int hashmap_iterate_pairs(struct hashmap_s *const hashmap,
                                 int (*f)(void *const,
                                          struct hashmap_element_s *const),
                                 void *const context) HASHMAP_USED;

/// @brief Get the size of the hashmap.
/// @param hashmap The hashmap to get the size of.
/// @return The size of the hashmap.
static unsigned
hashmap_num_entries(const struct hashmap_s *const hashmap) HASHMAP_USED;

/// @brief Destroy the hashmap.
/// @param hashmap The hashmap to destroy.
static void hashmap_destroy(struct hashmap_s *const hashmap) HASHMAP_USED;

static unsigned hashmap_crc32_helper(const char *const s,
                                     const unsigned len) HASHMAP_USED;
static unsigned hashmap_hash_helper_int_helper(const struct hashmap_s *const m,
                                               const char *const keystring,
                                               const unsigned len) HASHMAP_USED;
static int hashmap_match_helper(const struct hashmap_element_s *const element,
                                const char *const key,
                                const unsigned len) HASHMAP_USED;
static int hashmap_hash_helper(const struct hashmap_s *const m,
                               const char *const key, const unsigned len,
                               unsigned *const out_index) HASHMAP_USED;
static int
hashmap_rehash_iterator(void *const new_hash,
                        struct hashmap_element_s *const e) HASHMAP_USED;
static int hashmap_rehash_helper(struct hashmap_s *const m) HASHMAP_USED;

#if defined(__cplusplus)
}
#endif

#if defined(__cplusplus)
#define HASHMAP_CAST(type, x) static_cast<type>(x)
#define HASHMAP_PTR_CAST(type, x) reinterpret_cast<type>(x)
#define HASHMAP_NULL NULL
#else
#define HASHMAP_CAST(type, x) ((type)x)
#define HASHMAP_PTR_CAST(type, x) ((type)x)
#define HASHMAP_NULL 0
#endif

int hashmap_create(za_Allocator* A, const unsigned initial_size,
                   struct hashmap_s *const out_hashmap) {
  out_hashmap->table_size = initial_size;
  out_hashmap->size = 0;
  out_hashmap->A = A;

  if (0 == initial_size || 0 != (initial_size & (initial_size - 1))) {
    return 1;
  }

  out_hashmap->data =
      HASHMAP_CAST(struct hashmap_element_s *,
                   calloc(initial_size, sizeof(struct hashmap_element_s)));
  if (!out_hashmap->data) {
    return 1;
  }

  return 0;
}

int hashmap_put(struct hashmap_s *const m, const char *const key,
                const unsigned len, const TagType value) {
  unsigned int index;

  /* Find a place to put our value. */
  while (!hashmap_hash_helper(m, key, len, &index)) {
    if (hashmap_rehash_helper(m)) {
      return 1;
    }
  }

  /* Set the data. */
  m->data[index].data = value;
  m->data[index].key = key;
  m->data[index].key_len = len;

  /* If the hashmap element was not already in use, set that it is being used
   * and bump our size. */
  if (0 == m->data[index].in_use) {
    m->data[index].in_use = 1;
    m->size++;
  }

  return 0;
}

TagType hashmap_get(const struct hashmap_s *const m, const char *const key,
                  const unsigned len) {
  unsigned int curr;
  unsigned int i;

  /* Find data location */
  curr = hashmap_hash_helper_int_helper(m, key, len);

  /* Linear probing, if necessary */
  for (i = 0; i < HASHMAP_MAX_CHAIN_LENGTH; i++) {
    if (m->data[curr].in_use) {
      if (hashmap_match_helper(&m->data[curr], key, len)) {
        return m->data[curr].data;
      }
    }

    curr = (curr + 1) % m->table_size;
  }

  /* Not found */
  return HASHMAP_NULL;
}

int hashmap_remove(struct hashmap_s *const m, const char *const key,
                   const unsigned len) {
  unsigned int i;
  unsigned int curr;

  /* Find key */
  curr = hashmap_hash_helper_int_helper(m, key, len);

  /* Linear probing, if necessary */
  for (i = 0; i < HASHMAP_MAX_CHAIN_LENGTH; i++) {
    if (m->data[curr].in_use) {
      if (hashmap_match_helper(&m->data[curr], key, len)) {
        /* Blank out the fields including in_use */
        memset(&m->data[curr], 0, sizeof(struct hashmap_element_s));

        /* Reduce the size */
        m->size--;

        return 0;
      }
    }

    curr = (curr + 1) % m->table_size;
  }

  return 1;
}

const char *hashmap_remove_and_return_key(struct hashmap_s *const m,
                                          const char *const key,
                                          const unsigned len) {
  unsigned int i;
  unsigned int curr;

  /* Find key */
  curr = hashmap_hash_helper_int_helper(m, key, len);

  /* Linear probing, if necessary */
  for (i = 0; i < HASHMAP_MAX_CHAIN_LENGTH; i++) {
    if (m->data[curr].in_use) {
      if (hashmap_match_helper(&m->data[curr], key, len)) {
        const char *const stored_key = m->data[curr].key;

        /* Blank out the fields */
        m->data[curr].in_use = 0;
        m->data[curr].data = HASHMAP_NULL;
        m->data[curr].key = HASHMAP_NULL;

        /* Reduce the size */
        m->size--;

        return stored_key;
      }
    }
    curr = (curr + 1) % m->table_size;
  }

  return HASHMAP_NULL;
}

int hashmap_iterate(const struct hashmap_s *const m,
                    int (*f)(void *const, TagType const), void *const context) {
  unsigned int i;

  /* Linear probing */
  for (i = 0; i < m->table_size; i++) {
    if (m->data[i].in_use) {
      if (!f(context, m->data[i].data)) {
        return 1;
      }
    }
  }
  return 0;
}

int hashmap_iterate_pairs(struct hashmap_s *const hashmap,
                          int (*f)(void *const,
                                   struct hashmap_element_s *const),
                          void *const context) {
  unsigned int i;
  struct hashmap_element_s *p;
  int r;

  /* Linear probing */
  for (i = 0; i < hashmap->table_size; i++) {
    p = &hashmap->data[i];
    if (p->in_use) {
      r = f(context, p);
      switch (r) {
      case -1: /* remove item */
        memset(p, 0, sizeof(struct hashmap_element_s));
        hashmap->size--;
        break;
      case 0: /* continue iterating */
        break;
      default: /* early exit */
        return 1;
      }
    }
  }
  return 0;
}

void hashmap_destroy(struct hashmap_s *const m) {
  za_Free(m->A, m->data);
  memset(m, 0, sizeof(struct hashmap_s));
}

unsigned hashmap_num_entries(const struct hashmap_s *const m) {
  return m->size;
}

unsigned hashmap_crc32_helper(const char *const s, const unsigned len) {
  unsigned i;
  unsigned crc32val = 0;

#if defined(HASHMAP_SSE42)
  for (i = 0; i < len; i++) {
    crc32val = _mm_crc32_u8(crc32val, HASHMAP_CAST(unsigned char, s[i]));
  }

  return crc32val;
#else
  // Using polynomial 0x11EDC6F41 to match SSE 4.2's crc function.
  static const unsigned crc32_tab[] = {
      0x00000000U, 0xF26B8303U, 0xE13B70F7U, 0x1350F3F4U, 0xC79A971FU,
      0x35F1141CU, 0x26A1E7E8U, 0xD4CA64EBU, 0x8AD958CFU, 0x78B2DBCCU,
      0x6BE22838U, 0x9989AB3BU, 0x4D43CFD0U, 0xBF284CD3U, 0xAC78BF27U,
      0x5E133C24U, 0x105EC76FU, 0xE235446CU, 0xF165B798U, 0x030E349BU,
      0xD7C45070U, 0x25AFD373U, 0x36FF2087U, 0xC494A384U, 0x9A879FA0U,
      0x68EC1CA3U, 0x7BBCEF57U, 0x89D76C54U, 0x5D1D08BFU, 0xAF768BBCU,
      0xBC267848U, 0x4E4DFB4BU, 0x20BD8EDEU, 0xD2D60DDDU, 0xC186FE29U,
      0x33ED7D2AU, 0xE72719C1U, 0x154C9AC2U, 0x061C6936U, 0xF477EA35U,
      0xAA64D611U, 0x580F5512U, 0x4B5FA6E6U, 0xB93425E5U, 0x6DFE410EU,
      0x9F95C20DU, 0x8CC531F9U, 0x7EAEB2FAU, 0x30E349B1U, 0xC288CAB2U,
      0xD1D83946U, 0x23B3BA45U, 0xF779DEAEU, 0x05125DADU, 0x1642AE59U,
      0xE4292D5AU, 0xBA3A117EU, 0x4851927DU, 0x5B016189U, 0xA96AE28AU,
      0x7DA08661U, 0x8FCB0562U, 0x9C9BF696U, 0x6EF07595U, 0x417B1DBCU,
      0xB3109EBFU, 0xA0406D4BU, 0x522BEE48U, 0x86E18AA3U, 0x748A09A0U,
      0x67DAFA54U, 0x95B17957U, 0xCBA24573U, 0x39C9C670U, 0x2A993584U,
      0xD8F2B687U, 0x0C38D26CU, 0xFE53516FU, 0xED03A29BU, 0x1F682198U,
      0x5125DAD3U, 0xA34E59D0U, 0xB01EAA24U, 0x42752927U, 0x96BF4DCCU,
      0x64D4CECFU, 0x77843D3BU, 0x85EFBE38U, 0xDBFC821CU, 0x2997011FU,
      0x3AC7F2EBU, 0xC8AC71E8U, 0x1C661503U, 0xEE0D9600U, 0xFD5D65F4U,
      0x0F36E6F7U, 0x61C69362U, 0x93AD1061U, 0x80FDE395U, 0x72966096U,
      0xA65C047DU, 0x5437877EU, 0x4767748AU, 0xB50CF789U, 0xEB1FCBADU,
      0x197448AEU, 0x0A24BB5AU, 0xF84F3859U, 0x2C855CB2U, 0xDEEEDFB1U,
      0xCDBE2C45U, 0x3FD5AF46U, 0x7198540DU, 0x83F3D70EU, 0x90A324FAU,
      0x62C8A7F9U, 0xB602C312U, 0x44694011U, 0x5739B3E5U, 0xA55230E6U,
      0xFB410CC2U, 0x092A8FC1U, 0x1A7A7C35U, 0xE811FF36U, 0x3CDB9BDDU,
      0xCEB018DEU, 0xDDE0EB2AU, 0x2F8B6829U, 0x82F63B78U, 0x709DB87BU,
      0x63CD4B8FU, 0x91A6C88CU, 0x456CAC67U, 0xB7072F64U, 0xA457DC90U,
      0x563C5F93U, 0x082F63B7U, 0xFA44E0B4U, 0xE9141340U, 0x1B7F9043U,
      0xCFB5F4A8U, 0x3DDE77ABU, 0x2E8E845FU, 0xDCE5075CU, 0x92A8FC17U,
      0x60C37F14U, 0x73938CE0U, 0x81F80FE3U, 0x55326B08U, 0xA759E80BU,
      0xB4091BFFU, 0x466298FCU, 0x1871A4D8U, 0xEA1A27DBU, 0xF94AD42FU,
      0x0B21572CU, 0xDFEB33C7U, 0x2D80B0C4U, 0x3ED04330U, 0xCCBBC033U,
      0xA24BB5A6U, 0x502036A5U, 0x4370C551U, 0xB11B4652U, 0x65D122B9U,
      0x97BAA1BAU, 0x84EA524EU, 0x7681D14DU, 0x2892ED69U, 0xDAF96E6AU,
      0xC9A99D9EU, 0x3BC21E9DU, 0xEF087A76U, 0x1D63F975U, 0x0E330A81U,
      0xFC588982U, 0xB21572C9U, 0x407EF1CAU, 0x532E023EU, 0xA145813DU,
      0x758FE5D6U, 0x87E466D5U, 0x94B49521U, 0x66DF1622U, 0x38CC2A06U,
      0xCAA7A905U, 0xD9F75AF1U, 0x2B9CD9F2U, 0xFF56BD19U, 0x0D3D3E1AU,
      0x1E6DCDEEU, 0xEC064EEDU, 0xC38D26C4U, 0x31E6A5C7U, 0x22B65633U,
      0xD0DDD530U, 0x0417B1DBU, 0xF67C32D8U, 0xE52CC12CU, 0x1747422FU,
      0x49547E0BU, 0xBB3FFD08U, 0xA86F0EFCU, 0x5A048DFFU, 0x8ECEE914U,
      0x7CA56A17U, 0x6FF599E3U, 0x9D9E1AE0U, 0xD3D3E1ABU, 0x21B862A8U,
      0x32E8915CU, 0xC083125FU, 0x144976B4U, 0xE622F5B7U, 0xF5720643U,
      0x07198540U, 0x590AB964U, 0xAB613A67U, 0xB831C993U, 0x4A5A4A90U,
      0x9E902E7BU, 0x6CFBAD78U, 0x7FAB5E8CU, 0x8DC0DD8FU, 0xE330A81AU,
      0x115B2B19U, 0x020BD8EDU, 0xF0605BEEU, 0x24AA3F05U, 0xD6C1BC06U,
      0xC5914FF2U, 0x37FACCF1U, 0x69E9F0D5U, 0x9B8273D6U, 0x88D28022U,
      0x7AB90321U, 0xAE7367CAU, 0x5C18E4C9U, 0x4F48173DU, 0xBD23943EU,
      0xF36E6F75U, 0x0105EC76U, 0x12551F82U, 0xE03E9C81U, 0x34F4F86AU,
      0xC69F7B69U, 0xD5CF889DU, 0x27A40B9EU, 0x79B737BAU, 0x8BDCB4B9U,
      0x988C474DU, 0x6AE7C44EU, 0xBE2DA0A5U, 0x4C4623A6U, 0x5F16D052U,
      0xAD7D5351U};

  for (i = 0; i < len; i++) {
    crc32val = crc32_tab[(HASHMAP_CAST(unsigned char, crc32val) ^
                          HASHMAP_CAST(unsigned char, s[i]))] ^
               (crc32val >> 8);
  }
  return crc32val;
#endif
}

unsigned hashmap_hash_helper_int_helper(const struct hashmap_s *const m,
                                        const char *const keystring,
                                        const unsigned len) {
  unsigned key = hashmap_crc32_helper(keystring, len);

  /* Robert Jenkins' 32 bit Mix Function */
  key += (key << 12);
  key ^= (key >> 22);
  key += (key << 4);
  key ^= (key >> 9);
  key += (key << 10);
  key ^= (key >> 2);
  key += (key << 7);
  key ^= (key >> 12);

  /* Knuth's Multiplicative Method */
  key = (key >> 3) * 2654435761;

  return key % m->table_size;
}

int hashmap_match_helper(const struct hashmap_element_s *const element,
                         const char *const key, const unsigned len) {
  return (element->key_len == len) && (0 == memcmp(element->key, key, len));
}

int hashmap_hash_helper(const struct hashmap_s *const m, const char *const key,
                        const unsigned len, unsigned *const out_index) {
  unsigned int start, curr;
  unsigned int i;
  int total_in_use;

  /* If full, return immediately */
  if (m->size >= m->table_size) {
    return 0;
  }

  /* Find the best index */
  curr = start = hashmap_hash_helper_int_helper(m, key, len);

  /* First linear probe to check if we've already insert the element */
  total_in_use = 0;

  for (i = 0; i < HASHMAP_MAX_CHAIN_LENGTH; i++) {
    const int in_use = m->data[curr].in_use;

    total_in_use += in_use;

    if (in_use && hashmap_match_helper(&m->data[curr], key, len)) {
      *out_index = curr;
      return 1;
    }

    curr = (curr + 1) % m->table_size;
  }

  curr = start;

  /* Second linear probe to actually insert our element (only if there was at
   * least one empty entry) */
  if (HASHMAP_MAX_CHAIN_LENGTH > total_in_use) {
    for (i = 0; i < HASHMAP_MAX_CHAIN_LENGTH; i++) {
      if (!m->data[curr].in_use) {
        *out_index = curr;
        return 1;
      }

      curr = (curr + 1) % m->table_size;
    }
  }

  return 0;
}

int hashmap_rehash_iterator(void *const new_hash,
                            struct hashmap_element_s *const e) {
  int temp = hashmap_put(HASHMAP_PTR_CAST(struct hashmap_s *, new_hash), e->key,
                         e->key_len, e->data);
  if (0 < temp) {
    return 1;
  }
  /* clear old value to avoid stale pointers */
  return -1;
}
/*
 * Doubles the size of the hashmap, and rehashes all the elements
 */
int hashmap_rehash_helper(struct hashmap_s *const m) {
  /* If this multiplication overflows hashmap_create will fail. */
  unsigned new_size = 2 * m->table_size;

  struct hashmap_s new_hash;

  int flag = hashmap_create(m->A, new_size, &new_hash);

  if (0 != flag) {
    return flag;
  }

  /* copy the old elements to the new table */
  flag = hashmap_iterate_pairs(m, hashmap_rehash_iterator,
                               HASHMAP_PTR_CAST(void *, &new_hash));

  if (0 != flag) {
    return flag;
  }

  hashmap_destroy(m);
  /* put new hash into old hash structure by copying */
  memcpy(m, &new_hash, sizeof(struct hashmap_s));

  return 0;
}

#if defined(_MSC_VER)
#pragma warning(pop)
#elif defined(__clang__)
#pragma clang diagnostic pop
#endif
//--------------------------------------

// for a name
Tag *for_name(za_Allocator *A, struct hashmap_s *m, const ekstring *name) {
  TagType type = hashmap_get(m, name->buf, name->length);
  if (type != 0) {
    Tag *t = (Tag *)za_Alloc(A, sizeof(Tag));
    t->type = type;
    t->custom_tag_name = (ekstring){NULL, 0, A};
    return t;
  } else {
    return initTagArgs(A, CUSTOM, *name);
  }
}

// init tags-hashmap
const struct hashmap_s *get_tag_map(za_Allocator *AA) {
  struct hashmap_s *data =
      (struct hashmap_s *)za_Alloc(AA, sizeof(struct hashmap_s));
  int res = hashmap_create(AA, 1024, data);

  if (res == 0) {
#define TAG(name, str) hashmap_put(data, str, strlen(str), (name))
    TAG(AREA, "area");
    TAG(BASE, "base");
    TAG(BASEFONT, "basefont");
    TAG(BGSOUND, "bgsound");
    TAG(BR, "br");
    TAG(COL, "col");
    TAG(COMMAND, "command");
    TAG(EMBED, "embed");
    TAG(FRAME, "frame");
    TAG(HR, "hr");
    TAG(IMAGE, "image");
    TAG(IMG, "img");
    TAG(INPUT, "input");
    TAG(ISINDEX, "isindex");
    TAG(KEYGEN, "keygen");
    TAG(LINK, "link");
    TAG(MENUITEM, "menuitem");
    TAG(META, "meta");
    TAG(NEXTID, "nextid");
    TAG(PARAM, "param");
    TAG(SOURCE, "source");
    TAG(TRACK, "track");
    TAG(WBR, "wbr");
    TAG(A, "a");
    TAG(ABBR, "bbr");
    TAG(ADDRESS, "address");
    TAG(ARTICLE, "article");
    TAG(ASIDE, "aside");
    TAG(AUDIO, "audio");
    TAG(B, "b");
    TAG(BDI, "di");
    TAG(BDO, "bdo");
    TAG(BLOCKQUOTE, "blockquote");
    TAG(BODY, "body");
    TAG(BUTTON, "button");
    TAG(CANVAS, "canvas");
    TAG(CAPTION, "caption");
    TAG(CITE, "cite");
    TAG(CODE, "code");
    TAG(COLGROUP, "colgroup");
    TAG(DATA, "data");
    TAG(DATALIST, "datalist");
    TAG(DD, "dd");
    TAG(DEL, "del");
    TAG(DETAILS, "details");
    TAG(DFN, "dfn");
    TAG(DIALOG, "dialog");
    TAG(DIV, "div");
    TAG(DL, "dl");
    TAG(DT, "dt");
    TAG(EM, "em");
    TAG(FIELDSET, "fieldset");
    TAG(FIGCAPTION, "figcaption");
    TAG(FIGURE, "figure");
    TAG(FOOTER, "footer");
    TAG(FORM, "form");
    TAG(H1, "h1");
    TAG(H2, "h2");
    TAG(H3, "h3");
    TAG(H4, "h4");
    TAG(H5, "h5");
    TAG(H6, "h6");
    TAG(HEAD, "head");
    TAG(HEADER, "header");
    TAG(HGROUP, "hgroup");
    TAG(HTML, "html");
    TAG(I, "i");
    TAG(IFRAME, "frame");
    TAG(INS, "ins");
    TAG(KBD, "kbd");
    TAG(LABEL, "label");
    TAG(LEGEND, "legend");
    TAG(LI, "li");
    TAG(MAIN, "main");
    TAG(MAP, "map");
    TAG(MARK, "mark");
    TAG(MATH, "math");
    TAG(MENU, "menu");
    TAG(METER, "meter");
    TAG(NAV, "nav");
    TAG(NOSCRIPT, "noscript");
    TAG(OBJECT, "object");
    TAG(OL, "ol");
    TAG(OPTGROUP, "optgroup");
    TAG(OPTION, "option");
    TAG(OUTPUT, "output");
    TAG(P, "p");
    TAG(PICTURE, "picture");
    TAG(PRE, "pre");
    TAG(PROGRESS, "progress");
    TAG(Q, "q");
    TAG(RB, "rb");
    TAG(RP, "RP");
    TAG(RT, "rt");
    TAG(RTC, "rtc");
    TAG(RUBY, "ruby");
    TAG(S, "s");
    TAG(SAMP, "samp");
    TAG(SCRIPT, "script");
    TAG(SECTION, "section");
    TAG(SELECT, "select");
    TAG(SLOT, "slot");
    TAG(SMALL, "small");
    TAG(SPAN, "span");
    TAG(STRONG, "strong");
    TAG(STYLE, "style");
    TAG(SUB, "sub");
    TAG(SUMMARY, "summary");
    TAG(SUP, "sup");
    TAG(SVG, "svg");
    TAG(TABLE, "table");
    TAG(TBODY, "tbody");
    TAG(TD, "td");
    TAG(TEMPLATE, "template");
    TAG(TEXTAREA, "textarea");
    TAG(TFOOT, "tfoot");
    TAG(TH, "th");
    TAG(THEAD, "thead");
    TAG(TIME, "time");
    TAG(TITLE, "title");
    TAG(TR, "tr");
    TAG(U, "u");
    TAG(UL, "ul");
    TAG(VAR, "var");
    TAG(VIDEO, "video");
    // TAG(CUSTOM);
#undef TAG
  }
  return data;
}

#endif