repodata.c

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/*
 * Copyright (c) 2007, Novell Inc.
 *
 * This program is licensed under the BSD license, read LICENSE.BSD
 * for further information
 */

/*
 * repodata.c
 *
 * Manage data coming from one repository
 *
 * a repository can contain multiple repodata entries, consisting of
 * different sets of keys and different sets of solvables
 */

#define _GNU_SOURCE
#include <string.h>
#include <fnmatch.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
#include <regex.h>

#include "repo.h"
#include "pool.h"
#include "poolid_private.h"
#include "util.h"
#include "hash.h"
#include "chksum.h"

#include "repopack.h"
#include "repopage.h"

extern unsigned int compress_buf (const unsigned char *in, unsigned int in_len,
                                  unsigned char *out, unsigned int out_len);
extern unsigned int unchecked_decompress_buf (const unsigned char *in,
                                              unsigned int in_len,
                                              unsigned char *out,
                                              unsigned int out_len);

#define REPODATA_BLOCK 255


void
repodata_initdata(Repodata *data, Repo *repo, int localpool)
{
  memset(data, 0, sizeof (*data));
  data->repo = repo;
  data->localpool = localpool;
  if (localpool)
    stringpool_init_empty(&data->spool);
  data->keys = sat_calloc(1, sizeof(Repokey));
  data->nkeys = 1;
  data->schemata = sat_calloc(1, sizeof(Id));
  data->schemadata = sat_calloc(1, sizeof(Id));
  data->nschemata = 1;
  data->schemadatalen = 1;
  repopagestore_init(&data->store);
}

void
repodata_freedata(Repodata *data)
{
  int i;

  sat_free(data->keys);

  sat_free(data->schemata);
  sat_free(data->schemadata);
  sat_free(data->schematahash);

  stringpool_free(&data->spool);
  dirpool_free(&data->dirpool);

  sat_free(data->mainschemaoffsets);
  sat_free(data->incoredata);
  sat_free(data->incoreoffset);
  sat_free(data->verticaloffset);

  repopagestore_free(&data->store);

  sat_free(data->vincore);

  if (data->attrs)
    for (i = 0; i < data->end - data->start; i++)
      sat_free(data->attrs[i]);
  sat_free(data->attrs);
  if (data->xattrs)
    for (i = 0; i < data->nxattrs; i++)
      sat_free(data->xattrs[i]);
  sat_free(data->xattrs);

  sat_free(data->attrdata);
  sat_free(data->attriddata);
}

Repodata *
repodata_create(Repo *repo, int localpool)
{
  Repodata *data;

  repo->nrepodata++;
  repo->repodata = sat_realloc2(repo->repodata, repo->nrepodata, sizeof(*data));
  data = repo->repodata + repo->nrepodata - 1;
  repodata_initdata(data, repo, localpool);
  return data;
}

void
repodata_free(Repodata *data)
{
  Repo *repo = data->repo;
  int i = data - repo->repodata;
  repodata_freedata(data);
  if (i < repo->nrepodata - 1)
    memmove(repo->repodata + i, repo->repodata + i + 1, (repo->nrepodata - 1 - i) * sizeof(Repodata));
  repo->nrepodata--;
}


/***************************************************************
 * key pool management
 */

/* this is not so time critical that we need a hash, so we do a simple
 * linear search */
Id
repodata_key2id(Repodata *data, Repokey *key, int create)
{
  Id keyid;

  for (keyid = 1; keyid < data->nkeys; keyid++)
    if (data->keys[keyid].name == key->name && data->keys[keyid].type == key->type)
      {
        if ((key->type == REPOKEY_TYPE_CONSTANT || key->type == REPOKEY_TYPE_CONSTANTID) && key->size != data->keys[keyid].size)
          continue;
        break;
      }
  if (keyid == data->nkeys)
    {
      if (!create)
        return 0;
      /* allocate new key */
      data->keys = sat_realloc2(data->keys, data->nkeys + 1, sizeof(Repokey));
      data->keys[data->nkeys++] = *key;
      if (data->verticaloffset)
        {
          data->verticaloffset = sat_realloc2(data->verticaloffset, data->nkeys, sizeof(Id));
          data->verticaloffset[data->nkeys - 1] = 0;
        }
      data->keybits[(key->name >> 3) & (sizeof(data->keybits) - 1)] |= 1 << (key->name & 7);
    }
  return keyid;
}


/***************************************************************
 * schema pool management
 */

#define SCHEMATA_BLOCK 31
#define SCHEMATADATA_BLOCK 255

Id
repodata_schema2id(Repodata *data, Id *schema, int create)
{
  int h, len, i;
  Id *sp, cid;
  Id *schematahash;

  if ((schematahash = data->schematahash) == 0)
    {
      data->schematahash = schematahash = sat_calloc(256, sizeof(Id));
      for (i = 0; i < data->nschemata; i++)
        {
          for (sp = data->schemadata + data->schemata[i], h = 0; *sp; len++)
            h = h * 7 + *sp++;
          h &= 255;
          schematahash[h] = i + 1;
        }
      data->schemadata = sat_extend_resize(data->schemadata, data->schemadatalen, sizeof(Id), SCHEMATADATA_BLOCK);
      data->schemata = sat_extend_resize(data->schemata, data->nschemata, sizeof(Id), SCHEMATA_BLOCK);
    }

  for (sp = schema, len = 0, h = 0; *sp; len++)
    h = h * 7 + *sp++;
  h &= 255;
  len++;

  cid = schematahash[h];
  if (cid)
    {
      cid--;
      if (!memcmp(data->schemadata + data->schemata[cid], schema, len * sizeof(Id)))
        return cid;
      /* cache conflict */
      for (cid = 0; cid < data->nschemata; cid++)
        if (!memcmp(data->schemadata + data->schemata[cid], schema, len * sizeof(Id)))
          return cid;
    }
  /* a new one */
  if (!create)
    return 0;
  data->schemadata = sat_extend(data->schemadata, data->schemadatalen, len, sizeof(Id), SCHEMATADATA_BLOCK);
  data->schemata = sat_extend(data->schemata, data->nschemata, 1, sizeof(Id), SCHEMATA_BLOCK);
  /* add schema */
  memcpy(data->schemadata + data->schemadatalen, schema, len * sizeof(Id));
  data->schemata[data->nschemata] = data->schemadatalen;
  data->schemadatalen += len;
  schematahash[h] = data->nschemata + 1;
#if 0
fprintf(stderr, "schema2id: new schema\n");
#endif
  return data->nschemata++;
}

void
repodata_free_schemahash(Repodata *data)
{
  data->schematahash = sat_free(data->schematahash);
  /* shrink arrays */
  data->schemata = sat_realloc2(data->schemata, data->nschemata, sizeof(Id));
  data->schemadata = sat_realloc2(data->schemadata, data->schemadatalen, sizeof(Id));
}


/***************************************************************
 * dir pool management
 */

Id
repodata_str2dir(Repodata *data, const char *dir, int create)
{
  Id id, parent;
  const char *dire;

  parent = 0;
  while (*dir == '/' && dir[1] == '/')
    dir++;
  if (*dir == '/' && !dir[1])
    {
      if (data->dirpool.ndirs)
        return 1;
      return dirpool_add_dir(&data->dirpool, 0, 1, create);
    }
  while (*dir)
    {
      dire = strchrnul(dir, '/');
      if (data->localpool)
        id = stringpool_strn2id(&data->spool, dir, dire - dir, create);
      else
        id = strn2id(data->repo->pool, dir, dire - dir, create);
      if (!id)
        return 0;
      parent = dirpool_add_dir(&data->dirpool, parent, id, create);
      if (!parent)
        return 0;
      if (!*dire)
        break;
      dir = dire + 1;
      while (*dir == '/')
        dir++;
    }
  return parent;
}

const char *
repodata_dir2str(Repodata *data, Id did, const char *suf)
{
  Pool *pool = data->repo->pool;
  int l = 0;
  Id parent, comp;
  const char *comps;
  char *p;

  if (!did)
    return suf ? suf : "";
  parent = did;
  while (parent)
    {
      comp = dirpool_compid(&data->dirpool, parent);
      comps = stringpool_id2str(data->localpool ? &data->spool : &pool->ss, comp);
      l += strlen(comps);
      parent = dirpool_parent(&data->dirpool, parent);
      if (parent)
        l++;
    }
  if (suf)
    l += strlen(suf) + 1;
  p = pool_alloctmpspace(pool, l + 1) + l;
  *p = 0;
  if (suf)
    {
      p -= strlen(suf);
      strcpy(p, suf);
      *--p = '/';
    }
  parent = did;
  while (parent)
    {
      comp = dirpool_compid(&data->dirpool, parent);
      comps = stringpool_id2str(data->localpool ? &data->spool : &pool->ss, comp);
      l = strlen(comps);
      p -= l;
      strncpy(p, comps, l);
      parent = dirpool_parent(&data->dirpool, parent);
      if (parent)
        *--p = '/';
    }
  return p;
}


/***************************************************************
 * data management
 */

static inline unsigned char *
data_skip_schema(Repodata *data, unsigned char *dp, Id schema)
{
  Id *keyp = data->schemadata + data->schemata[schema];
  for (; *keyp; keyp++)
    dp = data_skip_key(data, dp, data->keys + *keyp);
  return dp;
}

unsigned char *
data_skip_key(Repodata *data, unsigned char *dp, Repokey *key)
{
  int nentries, schema;
  switch(key->type)
    {
    case REPOKEY_TYPE_FIXARRAY:
      dp = data_read_id(dp, &nentries);
      if (!nentries)
        return dp;
      dp = data_read_id(dp, &schema);
      while (nentries--)
        dp = data_skip_schema(data, dp, schema);
      return dp;
    case REPOKEY_TYPE_FLEXARRAY:
      dp = data_read_id(dp, &nentries);
      while (nentries--)
        {
          dp = data_read_id(dp, &schema);
          dp = data_skip_schema(data, dp, schema);
        }
      return dp;
    default:
      if (key->storage == KEY_STORAGE_INCORE)
        dp = data_skip(dp, key->type);
      else if (key->storage == KEY_STORAGE_VERTICAL_OFFSET)
        {
          dp = data_skip(dp, REPOKEY_TYPE_ID);
          dp = data_skip(dp, REPOKEY_TYPE_ID);
        }
      return dp;
    }
}

static unsigned char *
forward_to_key(Repodata *data, Id keyid, Id *keyp, unsigned char *dp)
{
  Id k;

  if (!keyid)
    return 0;
  if (data->mainschemaoffsets && dp == data->incoredata + data->mainschemaoffsets[0] && keyp == data->schemadata + data->schemata[data->mainschema])
    {
      int i;
      for (i = 0; (k = *keyp++) != 0; i++)
        if (k == keyid)
          return data->incoredata + data->mainschemaoffsets[i];
      return 0;
    }
  while ((k = *keyp++) != 0)
    {
      if (k == keyid)
        return dp;
      if (data->keys[k].storage == KEY_STORAGE_VERTICAL_OFFSET)
        {
          dp = data_skip(dp, REPOKEY_TYPE_ID);  /* skip offset */
          dp = data_skip(dp, REPOKEY_TYPE_ID);  /* skip length */
          continue;
        }
      if (data->keys[k].storage != KEY_STORAGE_INCORE)
        continue;
      dp = data_skip_key(data, dp, data->keys + k);
    }
  return 0;
}

static unsigned char *
get_vertical_data(Repodata *data, Repokey *key, Id off, Id len)
{
  unsigned char *dp;
  if (!len)
    return 0;
  if (off >= data->lastverticaloffset)
    {
      off -= data->lastverticaloffset;
      if (off + len > data->vincorelen)
        return 0;
      return data->vincore + off;
    }
  if (off + len > key->size)
    return 0;
  /* we now have the offset, go into vertical */
  off += data->verticaloffset[key - data->keys];
  /* fprintf(stderr, "key %d page %d\n", key->name, off / BLOB_PAGESIZE); */
  dp = repopagestore_load_page_range(&data->store, off / BLOB_PAGESIZE, (off + len - 1) / BLOB_PAGESIZE);
  if (dp)
    dp += off % BLOB_PAGESIZE;
  return dp;
}

static inline unsigned char *
get_data(Repodata *data, Repokey *key, unsigned char **dpp, int advance)
{
  unsigned char *dp = *dpp;

  if (!dp)
    return 0;
  if (key->storage == KEY_STORAGE_INCORE)
    {
      if (advance)
        *dpp = data_skip_key(data, dp, key);
      return dp;
    }
  else if (key->storage == KEY_STORAGE_VERTICAL_OFFSET)
    {
      Id off, len;
      dp = data_read_id(dp, &off);
      dp = data_read_id(dp, &len);
      if (advance)
        *dpp = dp;
      return get_vertical_data(data, key, off, len);
    }
  return 0;
}

static int
load_repodata(Repodata *data)
{
  if (data->loadcallback)
    {
      data->loadcallback(data);
      if (data->state == REPODATA_AVAILABLE)
        return 1;
    }
  data->state = REPODATA_ERROR;
  return 0;
}

static inline int
maybe_load_repodata(Repodata *data, Id keyname)
{
  if (keyname && !repodata_precheck_keyname(data, keyname))
    return 0;   /* do not bother... */
  switch(data->state)
    {
    case REPODATA_STUB:
      if (keyname)
        {
          int i;
          for (i = 0; i < data->nkeys; i++)
            if (keyname == data->keys[i].name)
              break;
          if (i == data->nkeys)
            return 0;
        }
      return load_repodata(data);
    case REPODATA_ERROR:
      return 0;
    case REPODATA_AVAILABLE:
    case REPODATA_LOADING:
      return 1;
    default:
      data->state = REPODATA_ERROR;
      return 0;
    }
}

static inline unsigned char *
solvid2data(Repodata *data, Id solvid, Id *schemap)
{
  unsigned char *dp = data->incoredata;
  if (!dp)
    return 0;
  if (solvid == SOLVID_META)    /* META */
    dp += 1;
  else if (solvid == SOLVID_POS)        /* META */
    {
      Pool *pool = data->repo->pool;
      if (data->repo != pool->pos.repo)
        return 0;
      if (data != data->repo->repodata + pool->pos.repodataid)
        return 0;
      *schemap = pool->pos.schema;
      return data->incoredata + pool->pos.dp;
    }
  else
    {
      if (solvid < data->start || solvid >= data->end)
        return 0;
      dp += data->incoreoffset[solvid - data->start];
    }
  return data_read_id(dp, schemap);
}

/************************************************************************
 * data lookup
 */

static inline unsigned char *
find_key_data(Repodata *data, Id solvid, Id keyname, Repokey **keypp)
{
  unsigned char *dp;
  Id schema, *keyp, *kp;
  Repokey *key;

  if (!maybe_load_repodata(data, keyname))
    return 0;
  dp = solvid2data(data, solvid, &schema);
  if (!dp)
    return 0;
  keyp = data->schemadata + data->schemata[schema];
  for (kp = keyp; *kp; kp++)
    if (data->keys[*kp].name == keyname)
      break;
  if (!*kp)
    return 0;
  *keypp = key = data->keys + *kp;
  if (key->type == REPOKEY_TYPE_VOID || key->type == REPOKEY_TYPE_CONSTANT || key->type == REPOKEY_TYPE_CONSTANTID)
    return dp;  /* no need to forward... */
  dp = forward_to_key(data, *kp, keyp, dp);
  if (!dp)
    return 0;
  return get_data(data, key, &dp, 0);
}


Id
repodata_lookup_id(Repodata *data, Id solvid, Id keyname)
{
  unsigned char *dp;
  Repokey *key;
  Id id;

  dp = find_key_data(data, solvid, keyname, &key);
  if (!dp)
    return 0;
  if (key->type == REPOKEY_TYPE_CONSTANTID)
    return key->size;
  if (key->type != REPOKEY_TYPE_ID)
    return 0;
  dp = data_read_id(dp, &id);
  return id;
}

Id
repodata_globalize_id(Repodata *data, Id id, int create)
{
  if (!id || !data || !data->localpool)
    return id;
  return str2id(data->repo->pool, stringpool_id2str(&data->spool, id), create);
}

const char *
repodata_lookup_str(Repodata *data, Id solvid, Id keyname)
{
  unsigned char *dp;
  Repokey *key;
  Id id;

  dp = find_key_data(data, solvid, keyname, &key);
  if (!dp)
    return 0;
  if (key->type == REPOKEY_TYPE_STR)
    return (const char *)dp;
  if (key->type == REPOKEY_TYPE_CONSTANTID)
    return id2str(data->repo->pool, key->size);
  if (key->type == REPOKEY_TYPE_ID)
    dp = data_read_id(dp, &id);
  else
    return 0;
  if (data->localpool)
    return data->spool.stringspace + data->spool.strings[id];
  return id2str(data->repo->pool, id);
}

int
repodata_lookup_num(Repodata *data, Id solvid, Id keyname, unsigned int *value)
{
  unsigned char *dp;
  Repokey *key;
  KeyValue kv;

  *value = 0;
  dp = find_key_data(data, solvid, keyname, &key);
  if (!dp)
    return 0;
  if (key->type == REPOKEY_TYPE_NUM
      || key->type == REPOKEY_TYPE_U32
      || key->type == REPOKEY_TYPE_CONSTANT)
    {
      dp = data_fetch(dp, &kv, key);
      *value = kv.num;
      return 1;
    }
  return 0;
}

int
repodata_lookup_void(Repodata *data, Id solvid, Id keyname)
{
  Id schema;
  Id *keyp;
  unsigned char *dp;

  if (!maybe_load_repodata(data, keyname))
    return 0;
  dp = solvid2data(data, solvid, &schema);
  if (!dp)
    return 0;
  /* can't use find_key_data as we need to test the type */
  for (keyp = data->schemadata + data->schemata[schema]; *keyp; keyp++)
    if (data->keys[*keyp].name == keyname && data->keys[*keyp].type == REPOKEY_TYPE_VOID)
      return 1;
  return 0;
}

const unsigned char *
repodata_lookup_bin_checksum(Repodata *data, Id solvid, Id keyname, Id *typep)
{
  unsigned char *dp;
  Repokey *key;

  dp = find_key_data(data, solvid, keyname, &key);
  if (!dp)
    return 0;
  *typep = key->type;
  return dp;
}

int
repodata_lookup_idarray(Repodata *data, Id solvid, Id keyname, Queue *q)
{
  unsigned char *dp;
  Repokey *key;
  Id id;
  int eof = 0;

  queue_empty(q);
  dp = find_key_data(data, solvid, keyname, &key);
  if (!dp)
    return 0;
  for (;;)
    {
      dp = data_read_ideof(dp, &id, &eof);
      queue_push(q, id);
      if (eof)
        break;
    }
  return 1;
}

/************************************************************************
 * data search
 */


int
repodata_stringify(Pool *pool, Repodata *data, Repokey *key, KeyValue *kv, int flags)
{
  switch (key->type)
    {
    case REPOKEY_TYPE_ID:
    case REPOKEY_TYPE_CONSTANTID:
    case REPOKEY_TYPE_IDARRAY:
      if (data && data->localpool)
        kv->str = stringpool_id2str(&data->spool, kv->id);
      else
        kv->str = id2str(pool, kv->id);
      if ((flags & SEARCH_SKIP_KIND) != 0 && key->storage == KEY_STORAGE_SOLVABLE)
        {
          const char *s;
          for (s = kv->str; *s >= 'a' && *s <= 'z'; s++)
            ;
          if (*s == ':' && s > kv->str)
            kv->str = s + 1;
        }
      return 1;
    case REPOKEY_TYPE_STR:
      return 1;
    case REPOKEY_TYPE_DIRSTRARRAY:
      if (!(flags & SEARCH_FILES))
        return 1;       /* match just the basename */
      /* Put the full filename into kv->str.  */
      kv->str = repodata_dir2str(data, kv->id, kv->str);
      /* And to compensate for that put the "empty" directory into
         kv->id, so that later calls to repodata_dir2str on this data
         come up with the same filename again.  */
      kv->id = 0;
      return 1;
    case REPOKEY_TYPE_MD5:
    case REPOKEY_TYPE_SHA1:
    case REPOKEY_TYPE_SHA256:
      if (!(flags & SEARCH_CHECKSUMS))
        return 0;       /* skip em */
      kv->str = repodata_chk2str(data, key->type, (const unsigned char *)kv->str);
      return 1;
    default:
      return 0;
    }
}


struct subschema_data {
  Solvable *s;
  void *cbdata;
  KeyValue *parent;
};

/* search a specific repodata */
void
repodata_search(Repodata *data, Id solvid, Id keyname, int flags, int (*callback)(void *cbdata, Solvable *s, Repodata *data, Repokey *key, KeyValue *kv), void *cbdata)
{
  Id schema;
  Repokey *key;
  Id keyid, *kp, *keyp;
  unsigned char *dp, *ddp;
  int onekey = 0;
  int stop;
  KeyValue kv;
  Solvable *s;

  if (!maybe_load_repodata(data, keyname))
    return;
  if (solvid == SOLVID_SUBSCHEMA)
    {
      struct subschema_data *subd = cbdata;
      cbdata = subd->cbdata;
      s = subd->s;
      schema = subd->parent->id;
      dp = (unsigned char *)subd->parent->str;
      kv.parent = subd->parent;
    }
  else
    {
      schema = 0;
      dp = solvid2data(data, solvid, &schema);
      if (!dp)
        return;
      s = data->repo->pool->solvables + solvid;
      kv.parent = 0;
    }
  keyp = data->schemadata + data->schemata[schema];
  if (keyname)
    {
      /* search for a specific key */
      for (kp = keyp; *kp; kp++)
        if (data->keys[*kp].name == keyname)
          break;
      if (!*kp)
        return;
      dp = forward_to_key(data, *kp, keyp, dp);
      if (!dp)
        return;
      keyp = kp;
      onekey = 1;
    }
  while ((keyid = *keyp++) != 0)
    {
      stop = 0;
      key = data->keys + keyid;
      ddp = get_data(data, key, &dp, *keyp ? 1 : 0);

      if (key->type == REPOKEY_TYPE_FLEXARRAY || key->type == REPOKEY_TYPE_FIXARRAY)
        {
          struct subschema_data subd;
          int nentries;
          Id schema = 0;

          subd.cbdata = cbdata;
          subd.s = s;
          subd.parent = &kv;
          ddp = data_read_id(ddp, &nentries);
          kv.num = nentries;
          kv.entry = 0;
          kv.eof = 0;
          while (ddp && nentries > 0)
            {
              if (!--nentries)
                kv.eof = 1;
              if (key->type == REPOKEY_TYPE_FLEXARRAY || !kv.entry)
                ddp = data_read_id(ddp, &schema);
              kv.id = schema;
              kv.str = (char *)ddp;
              stop = callback(cbdata, s, data, key, &kv);
              if (stop > SEARCH_NEXT_KEY)
                return;
              if (stop && stop != SEARCH_ENTERSUB)
                break;
              if ((flags & SEARCH_SUB) != 0 || stop == SEARCH_ENTERSUB)
                repodata_search(data, SOLVID_SUBSCHEMA, 0, flags, callback, &subd);
              ddp = data_skip_schema(data, ddp, schema);
              kv.entry++;
            }
          if (!nentries && (flags & SEARCH_ARRAYSENTINEL) != 0)
            {
              /* sentinel */
              kv.eof = 2;
              kv.str = (char *)ddp;
              stop = callback(cbdata, s, data, key, &kv);
              if (stop > SEARCH_NEXT_KEY)
                return;
            }
          if (onekey)
            return;
          continue;
        }
      kv.entry = 0;
      do
        {
          ddp = data_fetch(ddp, &kv, key);
          if (!ddp)
            break;
          stop = callback(cbdata, s, data, key, &kv);
          kv.entry++;
        }
      while (!kv.eof && !stop);
      if (onekey || stop > SEARCH_NEXT_KEY)
        return;
    }
}

void
repodata_setpos_kv(Repodata *data, KeyValue *kv)
{
  Pool *pool = data->repo->pool;
  if (!kv)
    pool_clear_pos(pool);
  else
    {
      pool->pos.repo = data->repo;
      pool->pos.repodataid = data - data->repo->repodata;
      pool->pos.dp = (unsigned char *)kv->str - data->incoredata;
      pool->pos.schema = kv->id;
    }
}

/************************************************************************
 * data iterator functions
 */

static Repokey solvablekeys[RPM_RPMDBID - SOLVABLE_NAME + 1] = {
  { SOLVABLE_NAME,        REPOKEY_TYPE_ID, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_ARCH,        REPOKEY_TYPE_ID, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_EVR,         REPOKEY_TYPE_ID, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_VENDOR,      REPOKEY_TYPE_ID, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_PROVIDES,    REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_OBSOLETES,   REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_CONFLICTS,   REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_REQUIRES,    REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_RECOMMENDS,  REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_SUGGESTS,    REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_SUPPLEMENTS, REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { SOLVABLE_ENHANCES,    REPOKEY_TYPE_IDARRAY, 0, KEY_STORAGE_SOLVABLE },
  { RPM_RPMDBID,          REPOKEY_TYPE_U32, 0, KEY_STORAGE_SOLVABLE },
};

static inline Id *
solvabledata_fetch(Solvable *s, KeyValue *kv, Id keyname)
{
  kv->id = keyname;
  switch (keyname)
    {
    case SOLVABLE_NAME:
      kv->eof = 1;
      return &s->name;
    case SOLVABLE_ARCH:
      kv->eof = 1;
      return &s->arch;
    case SOLVABLE_EVR:
      kv->eof = 1;
      return &s->evr;
    case SOLVABLE_VENDOR:
      kv->eof = 1;
      return &s->vendor;
    case SOLVABLE_PROVIDES:
      kv->eof = 0;
      return s->provides ? s->repo->idarraydata + s->provides : 0;
    case SOLVABLE_OBSOLETES:
      kv->eof = 0;
      return s->obsoletes ? s->repo->idarraydata + s->obsoletes : 0;
    case SOLVABLE_CONFLICTS:
      kv->eof = 0;
      return s->conflicts ? s->repo->idarraydata + s->conflicts : 0;
    case SOLVABLE_REQUIRES:
      kv->eof = 0;
      return s->requires ? s->repo->idarraydata + s->requires : 0;
    case SOLVABLE_RECOMMENDS:
      kv->eof = 0;
      return s->recommends ? s->repo->idarraydata + s->recommends : 0;
    case SOLVABLE_SUPPLEMENTS:
      kv->eof = 0;
      return s->supplements ? s->repo->idarraydata + s->supplements : 0;
    case SOLVABLE_SUGGESTS:
      kv->eof = 0;
      return s->suggests ? s->repo->idarraydata + s->suggests : 0;
    case SOLVABLE_ENHANCES:
      kv->eof = 0;
      return s->enhances ? s->repo->idarraydata + s->enhances : 0;
    case RPM_RPMDBID:
      kv->eof = 1;
      return s->repo->rpmdbid ? s->repo->rpmdbid + (s - s->repo->pool->solvables - s->repo->start) : 0;
    default:
      return 0;
    }
}

int
datamatcher_init(Datamatcher *ma, const char *match, int flags)
{
  ma->match = match;
  ma->flags = flags;
  ma->error = 0;
  ma->matchdata = 0;
  if ((flags & SEARCH_STRINGMASK) == SEARCH_REGEX)
    {
      ma->matchdata = sat_calloc(1, sizeof(regex_t));
      ma->error = regcomp((regex_t *)ma->matchdata, match, REG_EXTENDED | REG_NOSUB | REG_NEWLINE | ((flags & SEARCH_NOCASE) ? REG_ICASE : 0));
      if (ma->error)
        {
          sat_free(ma->matchdata);
          ma->flags = (flags & ~SEARCH_STRINGMASK) | SEARCH_ERROR;
        }
    }
  return ma->error;
}

void
datamatcher_free(Datamatcher *ma)
{
  if ((ma->flags & SEARCH_STRINGMASK) == SEARCH_REGEX && ma->matchdata)
    {
      regfree(ma->matchdata);
      ma->matchdata = sat_free(ma->matchdata);
    }
}

int
datamatcher_match(Datamatcher *ma, const char *str)
{
  int l;
  switch ((ma->flags & SEARCH_STRINGMASK))
    {
    case SEARCH_SUBSTRING:
      if (ma->flags & SEARCH_NOCASE)
        {
          if (!strcasestr(str, ma->match))
            return 0;
        }
      else
        {
          if (!strstr(str, ma->match))
            return 0;
        }
      break;
    case SEARCH_STRING:
      if (ma->flags & SEARCH_NOCASE)
        {
          if (strcasecmp(ma->match, str))
            return 0;
        }
      else
        {
          if (strcmp(ma->match, str))
            return 0;
        }
      break;
    case SEARCH_STRINGSTART:
      if (ma->flags & SEARCH_NOCASE)
        {
          if (strncasecmp(ma->match, str, strlen(ma->match)))
            return 0;
        }
      else
        {
          if (strncmp(ma->match, str, strlen(ma->match)))
            return 0;
        }
      break;
    case SEARCH_STRINGEND:
      l = strlen(str) - strlen(ma->match);
      if (l < 0)
        return 0;
      if (ma->flags & SEARCH_NOCASE)
        {
          if (strcasecmp(ma->match, str + l))
            return 0;
        }
      else
        {
          if (strcmp(ma->match, str + l))
            return 0;
        }
      break;
    case SEARCH_GLOB:
      if (fnmatch(ma->match, str, (ma->flags & SEARCH_NOCASE) ? FNM_CASEFOLD : 0))
        return 0;
      break;
    case SEARCH_REGEX:
      if (regexec((const regex_t *)ma->matchdata, str, 0, NULL, 0))
        return 0;
      break;
    default:
      return 0;
    }
  return 1;
}

int
repodata_filelistfilter_matches(Repodata *data, const char *str)
{
  /* '.*bin\/.*', '^\/etc\/.*', '^\/usr\/lib\/sendmail$' */
  /* for now hardcoded */
  if (strstr(str, "bin/"))
    return 1;
  if (!strncmp(str, "/etc/", 5))
    return 1;
  if (!strcmp(str, "/usr/lib/sendmail"))
    return 1;
  return 0;
}


enum {
  di_bye,

  di_enterrepo,
  di_entersolvable,
  di_enterrepodata,
  di_enterschema,
  di_enterkey,

  di_nextattr,
  di_nextkey,
  di_nextrepodata,
  di_nextsolvable,
  di_nextrepo,

  di_enterarray,
  di_nextarrayelement,

  di_entersub,
  di_leavesub,

  di_nextsolvableattr,
  di_nextsolvablekey,
  di_entersolvablekey
};

/* see repo.h for documentation */
int
dataiterator_init(Dataiterator *di, Pool *pool, Repo *repo, Id p, Id keyname, const char *match, int flags)
{
  memset(di, 0, sizeof(*di));
  di->pool = pool;
  di->flags = flags & ~SEARCH_THISSOLVID;
  if (!pool || (repo && repo->pool != pool))
    {
      di->state = di_bye;
      return -1;
    }
  if (match)
    {
      int error;
      if ((error = datamatcher_init(&di->matcher, match, flags)) != 0)
        {
          di->state = di_bye;
          return error;
        }
    }
  di->keyname = keyname;
  di->keynames[0] = keyname;
  dataiterator_set_search(di, repo, p);
  return 0;
}

void
dataiterator_init_clone(Dataiterator *di, Dataiterator *from)
{
  *di = *from;
  memset(&di->matcher, 0, sizeof(di->matcher));
  if (from->matcher.match)
    datamatcher_init(&di->matcher, from->matcher.match, from->matcher.flags);
  if (di->nparents)
    {
      /* fix pointers */
      int i;
      for (i = 1; i < di->nparents; i++)
        di->parents[i].kv.parent = &di->parents[i - 1].kv;
      di->kv.parent = &di->parents[di->nparents - 1].kv;
    }
}

int
dataiterator_set_match(Dataiterator *di, const char *match, int flags)
{
  di->flags = (flags & ~SEARCH_THISSOLVID) | (di->flags & SEARCH_THISSOLVID);
  datamatcher_free(&di->matcher);
  memset(&di->matcher, 0, sizeof(di->matcher));
  if (match)
    {
      int error;
      if ((error = datamatcher_init(&di->matcher, match, flags)) != 0)
        {
          di->state = di_bye;
          return error;
        }
    }
  return 0;
}

void
dataiterator_set_search(Dataiterator *di, Repo *repo, Id p)
{
  di->repo = repo;
  di->repoid = -1;
  di->flags &= ~SEARCH_THISSOLVID;
  di->nparents = 0;
  di->rootlevel = 0;
  di->repodataid = 0;
  if (!di->pool->nrepos)
    {
      di->state = di_bye;
      return;
    }
  if (!repo)
    {
      di->repoid = 0;
      di->repo = di->pool->repos[0];
    }
  di->state = di_enterrepo;
  if (p)
    dataiterator_jump_to_solvid(di, p);
}

void
dataiterator_set_keyname(Dataiterator *di, Id keyname)
{
  di->nkeynames = 0;
  di->keyname = keyname;
  di->keynames[0] = keyname;
}

void
dataiterator_prepend_keyname(Dataiterator *di, Id keyname)
{
  int i;

  if (di->nkeynames >= sizeof(di->keynames)/sizeof(*di->keynames) - 2)
    {
      di->state = di_bye;       /* sorry */
      return;
    }
  for (i = di->nkeynames + 1; i > 0; i--)
    di->keynames[i] = di->keynames[i - 1];
  di->keynames[0] = di->keyname = keyname;
  di->nkeynames++;
}

void
dataiterator_free(Dataiterator *di)
{
  if (di->matcher.match)
    datamatcher_free(&di->matcher);
}

static inline unsigned char *
dataiterator_find_keyname(Dataiterator *di, Id keyname)
{
  Id *keyp = di->keyp;
  Repokey *keys = di->data->keys;
  unsigned char *dp;

  for (keyp = di->keyp; *keyp; keyp++)
    if (keys[*keyp].name == keyname)
      break;
  if (!*keyp)
    return 0;
  dp = forward_to_key(di->data, *keyp, di->keyp, di->dp);
  if (!dp)
    return 0;
  di->keyp = keyp;
  return dp;
}

static int
dataiterator_filelistcheck(Dataiterator *di)
{
  int j;
  int needcomplete = 0;
  Repodata *data = di->data;

  if ((di->matcher.flags & SEARCH_COMPLETE_FILELIST) != 0)
    if (!di->matcher.match || (di->matcher.flags & (SEARCH_STRINGMASK|SEARCH_NOCASE)) != SEARCH_STRING || !repodata_filelistfilter_matches(di->data, di->matcher.match))
      needcomplete = 1;
  if (data->state != REPODATA_AVAILABLE)
    return needcomplete ? 1 : 0;
  for (j = 1; j < data->nkeys; j++)
    if (data->keys[j].name != REPOSITORY_SOLVABLES && data->keys[j].name != SOLVABLE_FILELIST)
      break;
  return j == data->nkeys && !needcomplete ? 0 : 1;
}

int
dataiterator_step(Dataiterator *di)
{
  Id schema;

  for (;;)
    {
      switch (di->state)
        {
        case di_enterrepo: di_enterrepo:
          if (!di->repo)
            goto di_bye;
          if (di->repo->disabled && !(di->flags & SEARCH_DISABLED_REPOS))
            goto di_nextrepo;
          if (!(di->flags & SEARCH_THISSOLVID))
            {
              di->solvid = di->repo->start - 1; /* reset solvid iterator */
              goto di_nextsolvable;
            }
          /* FALLTHROUGH */

        case di_entersolvable: di_entersolvable:
          if (di->repodataid >= 0)
            {
              di->repodataid = 0;       /* reset repodata iterator */
              if (di->solvid > 0 && !(di->flags & SEARCH_NO_STORAGE_SOLVABLE) && (!di->keyname || (di->keyname >= SOLVABLE_NAME && di->keyname <= RPM_RPMDBID)) && di->nparents - di->rootlevel == di->nkeynames)
                {
                  di->key = solvablekeys + (di->keyname ? di->keyname - SOLVABLE_NAME : 0);
                  di->data = 0;
                  goto di_entersolvablekey;
                }
            }
          /* FALLTHROUGH */

        case di_enterrepodata: di_enterrepodata:
          if (di->repodataid >= 0)
            {
              if (di->repodataid >= di->repo->nrepodata)
                goto di_nextsolvable;
              di->data = di->repo->repodata + di->repodataid;
            }
          if (di->repodataid >= 0 && di->keyname == SOLVABLE_FILELIST && !dataiterator_filelistcheck(di))
            goto di_nextrepodata;
          if (!maybe_load_repodata(di->data, di->keyname))
            goto di_nextrepodata;
          di->dp = solvid2data(di->data, di->solvid, &schema);
          if (!di->dp)
            goto di_nextrepodata;
          if (di->solvid == SOLVID_POS)
            di->solvid = di->pool->pos.solvid;
          /* reset key iterator */
          di->keyp = di->data->schemadata + di->data->schemata[schema];
          /* FALLTHROUGH */

        case di_enterschema: di_enterschema:
          if (di->keyname)
            di->dp = dataiterator_find_keyname(di, di->keyname);
          if (!di->dp || !*di->keyp)
            {
              if (di->kv.parent)
                goto di_leavesub;
              goto di_nextrepodata;
            }
          /* FALLTHROUGH */

        case di_enterkey: di_enterkey:
          di->kv.entry = -1;
          di->key = di->data->keys + *di->keyp;
          di->ddp = get_data(di->data, di->key, &di->dp, di->keyp[1] && (!di->keyname || (di->flags & SEARCH_SUB) != 0) ? 1 : 0);
          if (!di->ddp)
            goto di_nextkey;
          if (di->key->type == REPOKEY_TYPE_FIXARRAY || di->key->type == REPOKEY_TYPE_FLEXARRAY)
            goto di_enterarray;
          if (di->nkeynames && di->nparents - di->rootlevel < di->nkeynames)
            goto di_nextkey;
          /* FALLTHROUGH */

        case di_nextattr:
          di->kv.entry++;
          di->ddp = data_fetch(di->ddp, &di->kv, di->key);
          if (di->kv.eof)
            di->state = di_nextkey;
          else
            di->state = di_nextattr;
          break;

        case di_nextkey: di_nextkey:
          if (!di->keyname && *++di->keyp)
            goto di_enterkey;
          if (di->kv.parent)
            goto di_leavesub;
          /* FALLTHROUGH */

        case di_nextrepodata: di_nextrepodata:
          if (di->repodataid >= 0 && ++di->repodataid < di->repo->nrepodata)
              goto di_enterrepodata;
          /* FALLTHROUGH */

        case di_nextsolvable: di_nextsolvable:
          if (!(di->flags & SEARCH_THISSOLVID))
            {
              if (di->solvid < 0)
                di->solvid = di->repo->start;
              else
                di->solvid++;
              for (; di->solvid < di->repo->end; di->solvid++)
                {
                  if (di->pool->solvables[di->solvid].repo == di->repo)
                    goto di_entersolvable;
                }
            }
          /* FALLTHROUGH */

        case di_nextrepo: di_nextrepo:
          if (di->repoid >= 0)
            {
              di->repoid++;
              di->repodataid = 0;
              if (di->repoid < di->pool->nrepos)
                {
                  di->repo = di->pool->repos[di->repoid];
                  goto di_enterrepo;
                }
            }
        /* FALLTHROUGH */

        case di_bye: di_bye:
          di->state = di_bye;
          return 0;

        case di_enterarray: di_enterarray:
          if (di->key->name == REPOSITORY_SOLVABLES)
            goto di_nextkey;
          di->ddp = data_read_id(di->ddp, &di->kv.num);
          di->kv.eof = 0;
          di->kv.entry = -1;
          /* FALLTHROUGH */

        case di_nextarrayelement: di_nextarrayelement:
          di->kv.entry++;
          if (di->kv.entry)
            di->ddp = data_skip_schema(di->data, di->ddp, di->kv.id);
          if (di->kv.entry == di->kv.num)
            {
              if (di->nkeynames && di->nparents - di->rootlevel < di->nkeynames)
                goto di_nextkey;
              if (!(di->flags & SEARCH_ARRAYSENTINEL))
                goto di_nextkey;
              di->kv.str = (char *)di->ddp;
              di->kv.eof = 2;
              di->state = di_nextkey;
              break;
            }
          if (di->kv.entry == di->kv.num - 1)
            di->kv.eof = 1;
          if (di->key->type == REPOKEY_TYPE_FLEXARRAY || !di->kv.entry)
            di->ddp = data_read_id(di->ddp, &di->kv.id);
          di->kv.str = (char *)di->ddp;
          if (di->nkeynames && di->nparents - di->rootlevel < di->nkeynames)
            goto di_entersub;
          if ((di->flags & SEARCH_SUB) != 0)
            di->state = di_entersub;
          else
            di->state = di_nextarrayelement;
          break;

        case di_entersub: di_entersub:
          if (di->nparents == sizeof(di->parents)/sizeof(*di->parents) - 1)
            goto di_nextarrayelement;   /* sorry, full */
          di->parents[di->nparents].kv = di->kv;
          di->parents[di->nparents].dp = di->dp;
          di->parents[di->nparents].keyp = di->keyp;
          di->dp = (unsigned char *)di->kv.str;
          di->keyp = di->data->schemadata + di->data->schemata[di->kv.id];
          memset(&di->kv, 0, sizeof(di->kv));
          di->kv.parent = &di->parents[di->nparents].kv;
          di->nparents++;
          di->keyname = di->keynames[di->nparents - di->rootlevel];
          goto di_enterschema;

        case di_leavesub: di_leavesub:
          if (di->nparents - 1 < di->rootlevel)
            goto di_bye;
          di->nparents--;
          di->dp = di->parents[di->nparents].dp;
          di->kv = di->parents[di->nparents].kv;
          di->keyp = di->parents[di->nparents].keyp;
          di->key = di->data->keys + *di->keyp;
          di->ddp = (unsigned char *)di->kv.str;
          di->keyname = di->keynames[di->nparents - di->rootlevel];
          goto di_nextarrayelement;

        /* special solvable attr handling follows */

        case di_nextsolvableattr:
          di->kv.id = *di->idp++;
          di->kv.entry++;
          if (!*di->idp)
            {
              di->kv.eof = 1;
              di->state = di_nextsolvablekey;
            }
          break;

        case di_nextsolvablekey: di_nextsolvablekey:
          if (di->keyname || di->key->name == RPM_RPMDBID)
            goto di_enterrepodata;
          di->key++;
          /* FALLTHROUGH */

        case di_entersolvablekey: di_entersolvablekey:
          di->idp = solvabledata_fetch(di->pool->solvables + di->solvid, &di->kv, di->key->name);
          if (!di->idp || !di->idp[0])
            goto di_nextsolvablekey;
          di->kv.id = di->idp[0];
          di->kv.num = di->idp[0];
          di->idp++;
          if (!di->kv.eof && !di->idp[0])
            di->kv.eof = 1;
          di->kv.entry = 0;
          if (di->kv.eof)
            di->state = di_nextsolvablekey;
          else
            di->state = di_nextsolvableattr;
          break;
        }

      if (di->matcher.match)
        {
          /* simple pre-check so that we don't need to stringify */
          if (di->keyname == SOLVABLE_FILELIST && di->key->type == REPOKEY_TYPE_DIRSTRARRAY && di->matcher.match && (di->matcher.flags & (SEARCH_FILES|SEARCH_NOCASE|SEARCH_STRINGMASK)) == (SEARCH_FILES|SEARCH_STRING))
            {
              int l = strlen(di->matcher.match) - strlen(di->kv.str);
              if (l < 0 || strcmp(di->matcher.match + l, di->kv.str))
                continue;
            }
          if (!repodata_stringify(di->pool, di->data, di->key, &di->kv, di->flags))
            {
              if (di->keyname && (di->key->type == REPOKEY_TYPE_FIXARRAY || di->key->type == REPOKEY_TYPE_FLEXARRAY))
                return 1;
              continue;
            }
          if (!datamatcher_match(&di->matcher, di->kv.str))
            continue;
        }
      /* found something! */
      return 1;
    }
}

void
dataiterator_entersub(Dataiterator *di)
{
  if (di->state == di_nextarrayelement)
    di->state = di_entersub;
}

void
dataiterator_setpos(Dataiterator *di)
{
  if (di->kv.eof == 2)
    {
      pool_clear_pos(di->pool);
      return;
    }
  di->pool->pos.solvid = di->solvid;
  di->pool->pos.repo = di->repo;
  di->pool->pos.repodataid = di->data - di->repo->repodata;
  di->pool->pos.schema = di->kv.id;
  di->pool->pos.dp = (unsigned char *)di->kv.str - di->data->incoredata;
}

void
dataiterator_setpos_parent(Dataiterator *di)
{
  if (!di->kv.parent || di->kv.parent->eof == 2)
    {
      pool_clear_pos(di->pool);
      return;
    }
  di->pool->pos.solvid = di->solvid;
  di->pool->pos.repo = di->repo;
  di->pool->pos.repodataid = di->data - di->repo->repodata;
  di->pool->pos.schema = di->kv.parent->id;
  di->pool->pos.dp = (unsigned char *)di->kv.parent->str - di->data->incoredata;
}

/* clones just the position, not the search keys/matcher */
void
dataiterator_clonepos(Dataiterator *di, Dataiterator *from)
{
  di->state = from->state;
  di->flags &= ~SEARCH_THISSOLVID;
  di->flags |= (from->flags & SEARCH_THISSOLVID);
  di->repo = from->repo;
  di->data = from->data;
  di->dp = from->dp;
  di->ddp = from->ddp;
  di->idp = from->idp;
  di->keyp = from->keyp;
  di->key = from->key;
  di->kv = from->kv;
  di->repodataid = from->repodataid;
  di->solvid = from->solvid;
  di->repoid = from->repoid;
  di->rootlevel = from->rootlevel;
  memcpy(di->parents, from->parents, sizeof(from->parents));
  di->nparents = from->nparents;
  if (di->nparents)
    {
      int i;
      for (i = 1; i < di->nparents; i++)
        di->parents[i].kv.parent = &di->parents[i - 1].kv;
      di->kv.parent = &di->parents[di->nparents - 1].kv;
    }
}

void
dataiterator_seek(Dataiterator *di, int whence)
{
  if ((whence & DI_SEEK_STAY) != 0)
    di->rootlevel = di->nparents;
  switch (whence & ~DI_SEEK_STAY)
    {
    case DI_SEEK_CHILD:
      if (di->state != di_nextarrayelement)
        break;
      if ((whence & DI_SEEK_STAY) != 0)
        di->rootlevel = di->nparents + 1;       /* XXX: dangerous! */
      di->state = di_entersub;
      break;
    case DI_SEEK_PARENT:
      if (!di->nparents)
        {
          di->state = di_bye;
          break;
        }
      di->nparents--;
      if (di->rootlevel > di->nparents)
        di->rootlevel = di->nparents;
      di->dp = di->parents[di->nparents].dp;
      di->kv = di->parents[di->nparents].kv;
      di->keyp = di->parents[di->nparents].keyp;
      di->key = di->data->keys + *di->keyp;
      di->ddp = (unsigned char *)di->kv.str;
      di->keyname = di->keynames[di->nparents - di->rootlevel];
      di->state = di_nextarrayelement;
      break;
    case DI_SEEK_REWIND:
      if (!di->nparents)
        {
          di->state = di_bye;
          break;
        }
      di->dp = (unsigned char *)di->kv.parent->str;
      di->keyp = di->data->schemadata + di->data->schemata[di->kv.parent->id];
      di->state = di_enterschema;
      break;
    default:
      break;
    }
}

void
dataiterator_skip_attribute(Dataiterator *di)
{
  if (di->state == di_nextsolvableattr)
    di->state = di_nextsolvablekey;
  else
    di->state = di_nextkey;
}

void
dataiterator_skip_solvable(Dataiterator *di)
{
  di->nparents = 0;
  di->kv.parent = 0;
  di->rootlevel = 0;
  di->keyname = di->keynames[0];
  di->state = di_nextsolvable;
}

void
dataiterator_skip_repo(Dataiterator *di)
{
  di->nparents = 0;
  di->kv.parent = 0;
  di->rootlevel = 0;
  di->keyname = di->keynames[0];
  di->state = di_nextrepo;
}

void
dataiterator_jump_to_solvid(Dataiterator *di, Id solvid)
{
  di->nparents = 0;
  di->kv.parent = 0;
  di->rootlevel = 0;
  di->keyname = di->keynames[0];
  if (solvid == SOLVID_POS)
    {
      di->repo = di->pool->pos.repo;
      if (!di->repo)
        {
          di->state = di_bye;
          return;
        }
      di->repoid = -1;
      di->data = di->repo->repodata + di->pool->pos.repodataid;
      di->repodataid = -1;
      di->solvid = solvid;
      di->state = di_enterrepo;
      di->flags |= SEARCH_THISSOLVID;
      return;
    }
  if (solvid > 0)
    {
      di->repo = di->pool->solvables[solvid].repo;
      di->repoid = -1;
    }
  else if (di->repoid >= 0)
    {
      if (!di->pool->nrepos)
        {
          di->state = di_bye;
          return;
        }
      di->repo = di->pool->repos[0];
      di->repoid = 0;
    }
  di->repodataid = 0;
  di->solvid = solvid;
  if (solvid)
    di->flags |= SEARCH_THISSOLVID;
  di->state = di_enterrepo;
}

void
dataiterator_jump_to_repo(Dataiterator *di, Repo *repo)
{
  di->nparents = 0;
  di->kv.parent = 0;
  di->rootlevel = 0;
  di->repo = repo;
  di->repoid = -1;
  di->repodataid = 0;
  di->solvid = 0;
  di->flags &= ~SEARCH_THISSOLVID;
  di->state = di_enterrepo;
}

int
dataiterator_match(Dataiterator *di, Datamatcher *ma)
{
  if (!repodata_stringify(di->pool, di->data, di->key, &di->kv, di->flags))
    return 0;
  if (!ma)
    return 1;
  return datamatcher_match(ma, di->kv.str);
}

/************************************************************************
 * data modify functions
 */

/* extend repodata so that it includes solvables p */
void
repodata_extend(Repodata *data, Id p)
{
  if (data->start == data->end)
    data->start = data->end = p;
  if (p >= data->end)
    {
      int old = data->end - data->start;
      int new = p - data->end + 1;
      if (data->attrs)
        {
          data->attrs = sat_extend(data->attrs, old, new, sizeof(Id *), REPODATA_BLOCK);
          memset(data->attrs + old, 0, new * sizeof(Id *));
        }
      data->incoreoffset = sat_extend(data->incoreoffset, old, new, sizeof(Id), REPODATA_BLOCK);
      memset(data->incoreoffset + old, 0, new * sizeof(Id));
      data->end = p + 1;
    }
  if (p < data->start)
    {
      int old = data->end - data->start;
      int new = data->start - p;
      if (data->attrs)
        {
          data->attrs = sat_extend_resize(data->attrs, old + new, sizeof(Id *), REPODATA_BLOCK);
          memmove(data->attrs + new, data->attrs, old * sizeof(Id *));
          memset(data->attrs, 0, new * sizeof(Id *));
        }
      data->incoreoffset = sat_extend_resize(data->incoreoffset, old + new, sizeof(Id), REPODATA_BLOCK);
      memmove(data->incoreoffset + new, data->incoreoffset, old * sizeof(Id));
      memset(data->incoreoffset, 0, new * sizeof(Id));
      data->start = p;
    }
}

/* shrink end of repodata */
void
repodata_shrink(Repodata *data, int end)
{
  int i;

  if (data->end <= end)
    return;
  if (data->start >= end)
    {
      if (data->attrs)
        {
          for (i = 0; i < data->end - data->start; i++)
            sat_free(data->attrs[i]);
          data->attrs = sat_free(data->attrs);
        }
      data->incoreoffset = sat_free(data->incoreoffset);
      data->start = data->end = 0;
      return;
    }
  if (data->attrs)
    {
      for (i = end; i < data->end; i++)
        sat_free(data->attrs[i - data->start]);
      data->attrs = sat_extend_resize(data->attrs, end - data->start, sizeof(Id *), REPODATA_BLOCK);
    }
  if (data->incoreoffset)
    data->incoreoffset = sat_extend_resize(data->incoreoffset, end - data->start, sizeof(Id), REPODATA_BLOCK);
  data->end = end;
}

/* extend repodata so that it includes solvables from start to start + num - 1 */
void
repodata_extend_block(Repodata *data, Id start, Id num)
{
  if (!num)
    return;
  if (!data->incoreoffset)
    {
      data->incoreoffset = sat_calloc_block(num, sizeof(Id), REPODATA_BLOCK);
      data->start = start;
      data->end = start + num;
      return;
    }
  repodata_extend(data, start);
  if (num > 1)
    repodata_extend(data, start + num - 1);
}

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


#define REPODATA_ATTRS_BLOCK 31
#define REPODATA_ATTRDATA_BLOCK 1023
#define REPODATA_ATTRIDDATA_BLOCK 63


Id
repodata_new_handle(Repodata *data)
{
  if (!data->nxattrs)
    {
      data->xattrs = sat_calloc_block(1, sizeof(Id *), REPODATA_BLOCK);
      data->nxattrs = 2;
    }
  data->xattrs = sat_extend(data->xattrs, data->nxattrs, 1, sizeof(Id *), REPODATA_BLOCK);
  data->xattrs[data->nxattrs] = 0;
  return -(data->nxattrs++);
}

static inline Id **
repodata_get_attrp(Repodata *data, Id handle)
{
  if (handle == SOLVID_META)
    {
      if (!data->xattrs)
        {
          data->xattrs = sat_calloc_block(1, sizeof(Id *), REPODATA_BLOCK);
          data->nxattrs = 2;
        }
    }
  if (handle < 0)
    return data->xattrs - handle;
  if (handle < data->start || handle >= data->end)
    repodata_extend(data, handle);
  if (!data->attrs)
    data->attrs = sat_calloc_block(data->end - data->start, sizeof(Id *), REPODATA_BLOCK);
  return data->attrs + (handle - data->start);
}

static void
repodata_insert_keyid(Repodata *data, Id handle, Id keyid, Id val, int overwrite)
{
  Id *pp;
  Id *ap, **app;
  int i;

  app = repodata_get_attrp(data, handle);
  ap = *app;
  i = 0;
  if (ap)
    {
      /* Determine equality based on the name only, allows us to change
         type (when overwrite is set), and makes TYPE_CONSTANT work.  */
      for (pp = ap; *pp; pp += 2)
        if (data->keys[*pp].name == data->keys[keyid].name)
          break;
      if (*pp)
        {
          if (overwrite)
            {
              pp[0] = keyid;
              pp[1] = val;
            }
          return;
        }
      i = pp - ap;
    }
  ap = sat_extend(ap, i, 3, sizeof(Id), REPODATA_ATTRS_BLOCK);
  *app = ap;
  pp = ap + i;
  *pp++ = keyid;
  *pp++ = val;
  *pp = 0;
}


static void
repodata_set(Repodata *data, Id solvid, Repokey *key, Id val)
{
  Id keyid;

  keyid = repodata_key2id(data, key, 1);
  repodata_insert_keyid(data, solvid, keyid, val, 1);
}

void
repodata_set_id(Repodata *data, Id solvid, Id keyname, Id id)
{
  Repokey key;
  key.name = keyname;
  key.type = REPOKEY_TYPE_ID;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, id);
}

void
repodata_set_num(Repodata *data, Id solvid, Id keyname, unsigned int num)
{
  Repokey key;
  key.name = keyname;
  key.type = REPOKEY_TYPE_NUM;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, (Id)num);
}

void
repodata_set_poolstr(Repodata *data, Id solvid, Id keyname, const char *str)
{
  Repokey key;
  Id id;
  if (data->localpool)
    id = stringpool_str2id(&data->spool, str, 1);
  else
    id = str2id(data->repo->pool, str, 1);
  key.name = keyname;
  key.type = REPOKEY_TYPE_ID;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, id);
}

void
repodata_set_constant(Repodata *data, Id solvid, Id keyname, unsigned int constant)
{
  Repokey key;
  key.name = keyname;
  key.type = REPOKEY_TYPE_CONSTANT;
  key.size = constant;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, 0);
}

void
repodata_set_constantid(Repodata *data, Id solvid, Id keyname, Id id)
{
  Repokey key;
  key.name = keyname;
  key.type = REPOKEY_TYPE_CONSTANTID;
  key.size = id;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, 0);
}

void
repodata_set_void(Repodata *data, Id solvid, Id keyname)
{
  Repokey key;
  key.name = keyname;
  key.type = REPOKEY_TYPE_VOID;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  repodata_set(data, solvid, &key, 0);
}

void
repodata_set_str(Repodata *data, Id solvid, Id keyname, const char *str)
{
  Repokey key;
  int l;

  l = strlen(str) + 1;
  key.name = keyname;
  key.type = REPOKEY_TYPE_STR;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  data->attrdata = sat_extend(data->attrdata, data->attrdatalen, l, 1, REPODATA_ATTRDATA_BLOCK);
  memcpy(data->attrdata + data->attrdatalen, str, l);
  repodata_set(data, solvid, &key, data->attrdatalen);
  data->attrdatalen += l;
}

void
repodata_set_binary(Repodata *data, Id solvid, Id keyname, void *buf, int len)
{
  Repokey key;
  unsigned char *dp;

  key.name = keyname;
  key.type = REPOKEY_TYPE_BINARY;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  data->attrdata = sat_extend(data->attrdata, data->attrdatalen, len + 5, 1, REPODATA_ATTRDATA_BLOCK);
  dp = data->attrdata + data->attrdatalen;
  if (len >= (1 << 14))
    {
      if (len >= (1 << 28))
        *dp++ = (len >> 28) | 128;
      if (len >= (1 << 21))
        *dp++ = (len >> 21) | 128;
      *dp++ = (len >> 14) | 128;
    }
  if (len >= (1 << 7))
    *dp++ = (len >> 7) | 128;
  *dp++ = len & 127;
  if (len)
    memcpy(dp, buf, len);
  repodata_set(data, solvid, &key, data->attrdatalen);
  data->attrdatalen = dp + len - data->attrdata;
}

/* add an array element consisting of entrysize Ids to the repodata. modifies attriddata
 * so that the caller can append the new element there */
static void
repodata_add_array(Repodata *data, Id handle, Id keyname, Id keytype, int entrysize)
{
  int oldsize;
  Id *ida, *pp, **ppp;

  /* check if it is the same as last time, this speeds things up a lot */
  if (handle == data->lasthandle && data->keys[data->lastkey].name == keyname && data->keys[data->lastkey].type == keytype && data->attriddatalen == data->lastdatalen)
    {
      /* great! just append the new data */
      data->attriddata = sat_extend(data->attriddata, data->attriddatalen, entrysize, sizeof(Id), REPODATA_ATTRIDDATA_BLOCK);
      data->attriddatalen--;    /* overwrite terminating 0  */
      data->lastdatalen += entrysize;
      return;
    }

  ppp = repodata_get_attrp(data, handle);
  pp = *ppp;
  if (pp)
    for (; *pp; pp += 2)
      if (data->keys[*pp].name == keyname && data->keys[*pp].type == keytype)
        break;
  if (!pp || !*pp)
    {
      /* not found. allocate new key */
      Repokey key;
      key.name = keyname;
      key.type = keytype;
      key.size = 0;
      key.storage = KEY_STORAGE_INCORE;
      data->attriddata = sat_extend(data->attriddata, data->attriddatalen, entrysize + 1, sizeof(Id), REPODATA_ATTRIDDATA_BLOCK);
      repodata_set(data, handle, &key, data->attriddatalen);
      data->lasthandle = 0;     /* next time... */
      return;
    }
  oldsize = 0;
  for (ida = data->attriddata + pp[1]; *ida; ida += entrysize)
    oldsize += entrysize;
  if (ida + 1 == data->attriddata + data->attriddatalen)
    {
      /* this was the last entry, just append it */
      data->attriddata = sat_extend(data->attriddata, data->attriddatalen, entrysize, sizeof(Id), REPODATA_ATTRIDDATA_BLOCK);
      data->attriddatalen--;    /* overwrite terminating 0  */
    }
  else
    {
      /* too bad. move to back. */
      data->attriddata = sat_extend(data->attriddata, data->attriddatalen,  oldsize + entrysize + 1, sizeof(Id), REPODATA_ATTRIDDATA_BLOCK);
      memcpy(data->attriddata + data->attriddatalen, data->attriddata + pp[1], oldsize * sizeof(Id));
      pp[1] = data->attriddatalen;
      data->attriddatalen += oldsize;
    }
  data->lasthandle = handle;
  data->lastkey = *pp;
  data->lastdatalen = data->attriddatalen + entrysize + 1;
}

void
repodata_set_bin_checksum(Repodata *data, Id solvid, Id keyname, Id type,
                      const unsigned char *str)
{
  Repokey key;
  int l;

  if (!(l = sat_chksum_len(type)))
    return;
  key.name = keyname;
  key.type = type;
  key.size = 0;
  key.storage = KEY_STORAGE_INCORE;
  data->attrdata = sat_extend(data->attrdata, data->attrdatalen, l, 1, REPODATA_ATTRDATA_BLOCK);
  memcpy(data->attrdata + data->attrdatalen, str, l);
  repodata_set(data, solvid, &key, data->attrdatalen);
  data->attrdatalen += l;
}

static int
hexstr2bytes(unsigned char *buf, const char *str, int buflen)
{
  int i;
  for (i = 0; i < buflen; i++)
    {
#define c2h(c) (((c)>='0' && (c)<='9') ? ((c)-'0')              \
                : ((c)>='a' && (c)<='f') ? ((c)-('a'-10))       \
                : ((c)>='A' && (c)<='F') ? ((c)-('A'-10))       \
                : -1)
      int v = c2h(*str);
      str++;
      if (v < 0)
        return 0;
      buf[i] = v;
      v = c2h(*str);
      str++;
      if (v < 0)
        return 0;
      buf[i] = (buf[i] << 4) | v;
#undef c2h
    }
  return buflen;
}

void
repodata_set_checksum(Repodata *data, Id solvid, Id keyname, Id type,
                      const char *str)
{
  unsigned char buf[64];
  int l;

  if (!(l = sat_chksum_len(type)))
    return;
  if (hexstr2bytes(buf, str, l) != l)
    return;
  repodata_set_bin_checksum(data, solvid, keyname, type, buf);
}

const char *
repodata_chk2str(Repodata *data, Id type, const unsigned char *buf)
{
  int i, l;
  char *str, *s;

  if (!(l = sat_chksum_len(type)))
    return "";
  s = str = pool_alloctmpspace(data->repo->pool, 2 * l + 1);
  for (i = 0; i < l; i++)
    {
      unsigned char v = buf[i];
      unsigned char w = v >> 4;
      *s++ = w >= 10 ? w + ('a' - 10) : w + '0';
      w = v & 15;
      *s++ = w >= 10 ? w + ('a' - 10) : w + '0';
    }
  *s = 0;
  return str;
}

/* rpm filenames don't contain the epoch, so strip it */
static inline const char *
evrid2vrstr(Pool *pool, Id evrid)
{
  const char *p, *evr = id2str(pool, evrid);
  if (!evr)
    return evr;
  for (p = evr; *p >= '0' && *p <= '9'; p++)
    ;
  return p != evr && *p == ':' ? p + 1 : evr;
}

void
repodata_set_location(Repodata *data, Id solvid, int medianr, const char *dir, const char *file)
{
  Pool *pool = data->repo->pool;
  Solvable *s;
  const char *str, *fp;
  int l = 0;

  if (medianr)
    repodata_set_constant(data, solvid, SOLVABLE_MEDIANR, medianr);
  if (!dir)
    {
      if ((dir = strrchr(file, '/')) != 0)
        {
          l = dir - file;
          dir = file;
          file = dir + l + 1;
          if (!l)
            l++;
        }
    }
  else
    l = strlen(dir);
  if (l >= 2 && dir[0] == '.' && dir[1] == '/' && (l == 2 || dir[2] != '/'))
    {
      dir += 2;
      l -= 2;
    }
  if (l == 1 && dir[0] == '.')
    l = 0;
  s = pool->solvables + solvid;
  if (dir && l)
    {
      str = id2str(pool, s->arch);
      if (!strncmp(dir, str, l) && !str[l])
        repodata_set_void(data, solvid, SOLVABLE_MEDIADIR);
      else if (!dir[l])
        repodata_set_str(data, solvid, SOLVABLE_MEDIADIR, dir);
      else
        {
          char *dir2 = strdup(dir);
          dir2[l] = 0;
          repodata_set_str(data, solvid, SOLVABLE_MEDIADIR, dir2);
          free(dir2);
        }
    }
  fp = file;
  str = id2str(pool, s->name);
  l = strlen(str);
  if ((!l || !strncmp(fp, str, l)) && fp[l] == '-')
    {
      fp += l + 1;
      str = evrid2vrstr(pool, s->evr);
      l = strlen(str);
      if ((!l || !strncmp(fp, str, l)) && fp[l] == '.')
        {
          fp += l + 1;
          str = id2str(pool, s->arch);
          l = strlen(str);
          if ((!l || !strncmp(fp, str, l)) && !strcmp(fp + l, ".rpm"))
            {
              repodata_set_void(data, solvid, SOLVABLE_MEDIAFILE);
              return;
            }
        }
    }
  repodata_set_str(data, solvid, SOLVABLE_MEDIAFILE, file);
}

void
repodata_add_dirnumnum(Repodata *data, Id solvid, Id keyname, Id dir, Id num, Id num2)
{
  assert(dir);
#if 0
fprintf(stderr, "repodata_add_dirnumnum %d %d %d %d (%d)\n", solvid, dir, num, num2, data->attriddatalen);
#endif
  repodata_add_array(data, solvid, keyname, REPOKEY_TYPE_DIRNUMNUMARRAY, 3);
  data->attriddata[data->attriddatalen++] = dir;
  data->attriddata[data->attriddatalen++] = num;
  data->attriddata[data->attriddatalen++] = num2;
  data->attriddata[data->attriddatalen++] = 0;
}

void
repodata_add_dirstr(Repodata *data, Id solvid, Id keyname, Id dir, const char *str)
{
  Id stroff;
  int l;

  assert(dir);
  l = strlen(str) + 1;
  data->attrdata = sat_extend(data->attrdata, data->attrdatalen, l, 1, REPODATA_ATTRDATA_BLOCK);
  memcpy(data->attrdata + data->attrdatalen, str, l);
  stroff = data->attrdatalen;
  data->attrdatalen += l;

#if 0
fprintf(stderr, "repodata_add_dirstr %d %d %s (%d)\n", solvid, dir, str,  data->attriddatalen);
#endif
  repodata_add_array(data, solvid, keyname, REPOKEY_TYPE_DIRSTRARRAY, 2);
  data->attriddata[data->attriddatalen++] = dir;
  data->attriddata[data->attriddatalen++] = stroff;
  data->attriddata[data->attriddatalen++] = 0;
}

void
repodata_add_idarray(Repodata *data, Id solvid, Id keyname, Id id)
{
#if 0
fprintf(stderr, "repodata_add_idarray %d %d (%d)\n", solvid, id, data->attriddatalen);
#endif
  repodata_add_array(data, solvid, keyname, REPOKEY_TYPE_IDARRAY, 1);
  data->attriddata[data->attriddatalen++] = id;
  data->attriddata[data->attriddatalen++] = 0;
}

void
repodata_add_poolstr_array(Repodata *data, Id solvid, Id keyname,
                           const char *str)
{
  Id id;
  if (data->localpool)
    id = stringpool_str2id(&data->spool, str, 1);
  else
    id = str2id(data->repo->pool, str, 1);
  repodata_add_idarray(data, solvid, keyname, id);
}

void
repodata_add_fixarray(Repodata *data, Id solvid, Id keyname, Id ghandle)
{
  repodata_add_array(data, solvid, keyname, REPOKEY_TYPE_FIXARRAY, 1);
  data->attriddata[data->attriddatalen++] = ghandle;
  data->attriddata[data->attriddatalen++] = 0;
}

void
repodata_add_flexarray(Repodata *data, Id solvid, Id keyname, Id ghandle)
{
  repodata_add_array(data, solvid, keyname, REPOKEY_TYPE_FLEXARRAY, 1);
  data->attriddata[data->attriddatalen++] = ghandle;
  data->attriddata[data->attriddatalen++] = 0;
}

void
repodata_delete_uninternalized(Repodata *data, Id solvid, Id keyname)
{
  Id *pp, *ap, **app;
  app = repodata_get_attrp(data, solvid);
  ap = *app;
  if (!ap)
    return;
  for (; *ap; ap += 2)
    if (data->keys[*ap].name == keyname)
      break;
  if (!*ap)
    return;
  pp = ap;
  ap += 2;
  for (; *ap; ap += 2)
    {
      if (data->keys[*ap].name == keyname)
        continue;
      *pp++ = ap[0];
      *pp++ = ap[1];
    }
  *pp = 0;
}

/* add all attrs from src to dest */
void
repodata_merge_attrs(Repodata *data, Id dest, Id src)
{
  Id *keyp;
  if (dest == src || !(keyp = data->attrs[src - data->start]))
    return;
  for (; *keyp; keyp += 2)
    repodata_insert_keyid(data, dest, keyp[0], keyp[1], 0);
}

void
repodata_merge_some_attrs(Repodata *data, Id dest, Id src, Map *keyidmap, int overwrite)
{
  Id *keyp;
  if (dest == src || !(keyp = data->attrs[src - data->start]))
    return;
  for (; *keyp; keyp += 2)
    if (!keyidmap || MAPTST(keyidmap, keyp[0]))
      repodata_insert_keyid(data, dest, keyp[0], keyp[1], overwrite);
}



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

/* TODO: unify with repo_write and repo_solv! */

#define EXTDATA_BLOCK 1023

struct extdata {
  unsigned char *buf;
  int len;
};

static void
data_addid(struct extdata *xd, Id x)
{
  unsigned char *dp;

  xd->buf = sat_extend(xd->buf, xd->len, 5, 1, EXTDATA_BLOCK);
  dp = xd->buf + xd->len;

  if (x >= (1 << 14))
    {
      if (x >= (1 << 28))
        *dp++ = (x >> 28) | 128;
      if (x >= (1 << 21))
        *dp++ = (x >> 21) | 128;
      *dp++ = (x >> 14) | 128;
    }
  if (x >= (1 << 7))
    *dp++ = (x >> 7) | 128;
  *dp++ = x & 127;
  xd->len = dp - xd->buf;
}

static void
data_addideof(struct extdata *xd, Id x, int eof)
{
  if (x >= 64)
    x = (x & 63) | ((x & ~63) << 1);
  data_addid(xd, (eof ? x : x | 64));
}

static void
data_addblob(struct extdata *xd, unsigned char *blob, int len)
{
  xd->buf = sat_extend(xd->buf, xd->len, len, 1, EXTDATA_BLOCK);
  memcpy(xd->buf + xd->len, blob, len);
  xd->len += len;
}

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

static void
repodata_serialize_key(Repodata *data, struct extdata *newincore,
                       struct extdata *newvincore,
                       Id *schema,
                       Repokey *key, Id val)
{
  /* Otherwise we have a new value.  Parse it into the internal
     form.  */
  Id *ida;
  struct extdata *xd;
  unsigned int oldvincorelen = 0;
  Id schemaid, *sp;

  xd = newincore;
  if (key->storage == KEY_STORAGE_VERTICAL_OFFSET)
    {
      xd = newvincore;
      oldvincorelen = xd->len;
    }
  switch (key->type)
    {
    case REPOKEY_TYPE_VOID:
    case REPOKEY_TYPE_CONSTANT:
    case REPOKEY_TYPE_CONSTANTID:
      break;
    case REPOKEY_TYPE_STR:
      data_addblob(xd, data->attrdata + val, strlen((char *)(data->attrdata + val)) + 1);
      break;
    case REPOKEY_TYPE_MD5:
      data_addblob(xd, data->attrdata + val, SIZEOF_MD5);
      break;
    case REPOKEY_TYPE_SHA1:
      data_addblob(xd, data->attrdata + val, SIZEOF_SHA1);
      break;
    case REPOKEY_TYPE_SHA256:
      data_addblob(xd, data->attrdata + val, SIZEOF_SHA256);
      break;
    case REPOKEY_TYPE_ID:
    case REPOKEY_TYPE_NUM:
    case REPOKEY_TYPE_DIR:
      data_addid(xd, val);
      break;
    case REPOKEY_TYPE_BINARY:
      {
        Id len;
        unsigned char *dp = data_read_id(data->attrdata + val, &len);
        dp += len;
        data_addblob(xd, data->attrdata + val, dp - (data->attrdata + val));
      }
      break;
    case REPOKEY_TYPE_IDARRAY:
      for (ida = data->attriddata + val; *ida; ida++)
        data_addideof(xd, ida[0], ida[1] ? 0 : 1);
      break;
    case REPOKEY_TYPE_DIRNUMNUMARRAY:
      for (ida = data->attriddata + val; *ida; ida += 3)
        {
          data_addid(xd, ida[0]);
          data_addid(xd, ida[1]);
          data_addideof(xd, ida[2], ida[3] ? 0 : 1);
        }
      break;
    case REPOKEY_TYPE_DIRSTRARRAY:
      for (ida = data->attriddata + val; *ida; ida += 2)
        {
          data_addideof(xd, ida[0], ida[2] ? 0 : 1);
          data_addblob(xd, data->attrdata + ida[1], strlen((char *)(data->attrdata + ida[1])) + 1);
        }
      break;
    case REPOKEY_TYPE_FIXARRAY:
      {
        int num = 0;
        schemaid = 0;
        for (ida = data->attriddata + val; *ida; ida++)
          {
#if 0
            fprintf(stderr, "serialize struct %d\n", *ida);
#endif
            sp = schema;
            Id *kp = data->xattrs[-*ida];
            if (!kp)
              continue;
            num++;
            for (;*kp; kp += 2)
              {
#if 0
                fprintf(stderr, "  %s:%d\n", id2str(data->repo->pool, data->keys[*kp].name), kp[1]);
#endif
                *sp++ = *kp;
              }
            *sp = 0;
            if (!schemaid)
              schemaid = repodata_schema2id(data, schema, 1);
            else if (schemaid != repodata_schema2id(data, schema, 0))
              {
                pool_debug(data->repo->pool, SAT_FATAL, "fixarray substructs with different schemas\n");
                exit(1);
              }
#if 0
            fprintf(stderr, "  schema %d\n", schemaid);
#endif
          }
        if (!num)
          break;
        data_addid(xd, num);
        data_addid(xd, schemaid);
        for (ida = data->attriddata + val; *ida; ida++)
          {
            Id *kp = data->xattrs[-*ida];
            if (!kp)
              continue;
            for (;*kp; kp += 2)
              {
                repodata_serialize_key(data, newincore, newvincore,
                                       schema, data->keys + *kp, kp[1]);
              }
          }
        break;
      }
    case REPOKEY_TYPE_FLEXARRAY:
      {
        int num = 0;
        for (ida = data->attriddata + val; *ida; ida++)
          num++;
        data_addid(xd, num);
        for (ida = data->attriddata + val; *ida; ida++)
          {
            Id *kp = data->xattrs[-*ida];
            if (!kp)
              {
                data_addid(xd, 0);      /* XXX */
                continue;
              }
            sp = schema;
            for (;*kp; kp += 2)
              *sp++ = *kp;
            *sp = 0;
            schemaid = repodata_schema2id(data, schema, 1);
            data_addid(xd, schemaid);
            kp = data->xattrs[-*ida];
            for (;*kp; kp += 2)
              {
                repodata_serialize_key(data, newincore, newvincore,
                                       schema, data->keys + *kp, kp[1]);
              }
          }
        break;
      }
    default:
      pool_debug(data->repo->pool, SAT_FATAL, "don't know how to handle type %d\n", key->type);
      exit(1);
    }
  if (key->storage == KEY_STORAGE_VERTICAL_OFFSET)
    {
      /* put offset/len in incore */
      data_addid(newincore, data->lastverticaloffset + oldvincorelen);
      oldvincorelen = xd->len - oldvincorelen;
      data_addid(newincore, oldvincorelen);
    }
}

void
repodata_internalize(Repodata *data)
{
  Repokey *key, solvkey;
  Id entry, nentry;
  Id schemaid, *schema, *sp, oldschema, *keyp, *keypstart, *seen;
  unsigned char *dp, *ndp;
  int newschema, oldcount;
  struct extdata newincore;
  struct extdata newvincore;
  Id solvkeyid;

  if (!data->attrs && !data->xattrs)
    return;

  newvincore.buf = data->vincore;
  newvincore.len = data->vincorelen;

  /* find the solvables key, create if needed */
  memset(&solvkey, 0, sizeof(solvkey));
  solvkey.name = REPOSITORY_SOLVABLES;
  solvkey.type = REPOKEY_TYPE_FLEXARRAY;
  solvkey.size = 0;
  solvkey.storage = KEY_STORAGE_INCORE;
  solvkeyid = repodata_key2id(data, &solvkey, data->end != data->start ? 1 : 0);

  schema = sat_malloc2(data->nkeys, sizeof(Id));
  seen = sat_malloc2(data->nkeys, sizeof(Id));

  /* Merge the data already existing (in data->schemata, ->incoredata and
     friends) with the new attributes in data->attrs[].  */
  nentry = data->end - data->start;
  memset(&newincore, 0, sizeof(newincore));
  data_addid(&newincore, 0);    /* start data at offset 1 */

  data->mainschema = 0;
  data->mainschemaoffsets = sat_free(data->mainschemaoffsets);

  /* join entry data */
  /* we start with the meta data, entry -1 */
  for (entry = -1; entry < nentry; entry++)
    {
      memset(seen, 0, data->nkeys * sizeof(Id));
      oldschema = 0;
      dp = data->incoredata;
      if (dp)
        {
          dp += entry >= 0 ? data->incoreoffset[entry] : 1;
          dp = data_read_id(dp, &oldschema);
        }
#if 0
fprintf(stderr, "oldschema %d\n", oldschema);
fprintf(stderr, "schemata %d\n", data->schemata[oldschema]);
fprintf(stderr, "schemadata %p\n", data->schemadata);
#endif
      /* seen: -1: old data  0: skipped  >0: id + 1 */
      newschema = 0;
      oldcount = 0;
      sp = schema;
      for (keyp = data->schemadata + data->schemata[oldschema]; *keyp; keyp++)
        {
          if (seen[*keyp])
            {
              pool_debug(data->repo->pool, SAT_FATAL, "Inconsistent old data (key occured twice).\n");
              exit(1);
            }
          seen[*keyp] = -1;
          *sp++ = *keyp;
          oldcount++;
        }
      if (entry >= 0)
        keyp = data->attrs ? data->attrs[entry] : 0;
      else
        {
          /* strip solvables key */
          *sp = 0;
          for (sp = keyp = schema; *sp; sp++)
            if (*sp != solvkeyid)
              *keyp++ = *sp;
            else
              oldcount--;
          sp = keyp;
          seen[solvkeyid] = 0;
          keyp = data->xattrs ? data->xattrs[1] : 0;
        }
      if (keyp)
        for (; *keyp; keyp += 2)
          {
            if (!seen[*keyp])
              {
                newschema = 1;
                *sp++ = *keyp;
              }
            seen[*keyp] = keyp[1] + 1;
          }
      if (entry < 0 && data->end != data->start)
        {
          *sp++ = solvkeyid;
          newschema = 1;
        }
      *sp = 0;
      if (newschema)
        /* Ideally we'd like to sort the new schema here, to ensure
           schema equality independend of the ordering.  We can't do that
           yet.  For once see below (old ids need to come before new ids).
           An additional difficulty is that we also need to move
           the values with the keys.  */
        schemaid = repodata_schema2id(data, schema, 1);
      else
        schemaid = oldschema;


      /* Now create data blob.  We walk through the (possibly new) schema
         and either copy over old data, or insert the new.  */
      /* XXX Here we rely on the fact that the (new) schema has the form
         o1 o2 o3 o4 ... | n1 n2 n3 ...
         (oX being the old keyids (possibly overwritten), and nX being
          the new keyids).  This rules out sorting the keyids in order
         to ensure a small schema count.  */
      if (entry >= 0)
        data->incoreoffset[entry] = newincore.len;
      data_addid(&newincore, schemaid);
      if (entry == -1)
        {
          data->mainschema = schemaid;
          data->mainschemaoffsets = sat_calloc(sp - schema, sizeof(Id));
        }
      keypstart = data->schemadata + data->schemata[schemaid];
      for (keyp = keypstart; *keyp; keyp++)
        {
          if (entry == -1)
            data->mainschemaoffsets[keyp - keypstart] = newincore.len;
          if (*keyp == solvkeyid)
            {
              /* add flexarray entry count */
              data_addid(&newincore, data->end - data->start);
              break;
            }
          key = data->keys + *keyp;
#if 0
          fprintf(stderr, "internalize %d(%d):%s:%s\n", entry, entry + data->start, id2str(data->repo->pool, key->name), id2str(data->repo->pool, key->type));
#endif
          ndp = dp;
          if (oldcount)
            {
              /* Skip the data associated with this old key.  */
              if (key->storage == KEY_STORAGE_VERTICAL_OFFSET)
                {
                  ndp = data_skip(dp, REPOKEY_TYPE_ID);
                  ndp = data_skip(ndp, REPOKEY_TYPE_ID);
                }
              else if (key->storage == KEY_STORAGE_INCORE)
                ndp = data_skip_key(data, dp, key);
              oldcount--;
            }
          if (seen[*keyp] == -1)
            {
              /* If this key was an old one _and_ was not overwritten with
                 a different value copy over the old value (we skipped it
                 above).  */
              if (dp != ndp)
                data_addblob(&newincore, dp, ndp - dp);
              seen[*keyp] = 0;
            }
          else if (seen[*keyp])
            {
              /* Otherwise we have a new value.  Parse it into the internal
                 form.  */
              repodata_serialize_key(data, &newincore, &newvincore,
                                     schema, key, seen[*keyp] - 1);
            }
          dp = ndp;
        }
      if (entry >= 0 && data->attrs && data->attrs[entry])
        data->attrs[entry] = sat_free(data->attrs[entry]);
    }
  /* free all xattrs */
  for (entry = 0; entry < data->nxattrs; entry++)
    if (data->xattrs[entry])
      sat_free(data->xattrs[entry]);
  data->xattrs = sat_free(data->xattrs);
  data->nxattrs = 0;

  data->lasthandle = 0;
  data->lastkey = 0;
  data->lastdatalen = 0;
  sat_free(schema);
  sat_free(seen);
  repodata_free_schemahash(data);

  sat_free(data->incoredata);
  data->incoredata = newincore.buf;
  data->incoredatalen = newincore.len;
  data->incoredatafree = 0;

  sat_free(data->vincore);
  data->vincore = newvincore.buf;
  data->vincorelen = newvincore.len;

  data->attrs = sat_free(data->attrs);
  data->attrdata = sat_free(data->attrdata);
  data->attriddata = sat_free(data->attriddata);
  data->attrdatalen = 0;
  data->attriddatalen = 0;
}

void
repodata_disable_paging(Repodata *data)
{
  if (maybe_load_repodata(data, 0))
    repopagestore_disable_paging(&data->store);
}

static void
repodata_load_stub(Repodata *data)
{
  Repo *repo = data->repo;
  Pool *pool = repo->pool;
  int r;

  if (!pool->loadcallback)
    {
      data->state = REPODATA_ERROR;
      return;
    }
  data->state = REPODATA_LOADING;
  r = pool->loadcallback(pool, data, pool->loadcallbackdata);
  if (!r)
    data->state = REPODATA_ERROR;
}

void
repodata_create_stubs(Repodata *data)
{
  Repo *repo = data->repo;
  Pool *pool = repo->pool;
  Repodata *sdata;
  int *stubdataids;
  Dataiterator di;
  Id xkeyname = 0;
  int i, cnt = 0;
  int repodataid;
  int datastart, dataend;

  repodataid = data - repo->repodata;
  datastart = data->start;
  dataend = data->end;
  dataiterator_init(&di, pool, repo, SOLVID_META, REPOSITORY_EXTERNAL, 0, 0);
  while (dataiterator_step(&di))
    {
      if (di.data - repo->repodata != repodataid)
        continue;
      cnt++;
    }
  dataiterator_free(&di);
  if (!cnt)
    return;
  stubdataids = sat_calloc(cnt, sizeof(*stubdataids));
  for (i = 0; i < cnt; i++)
    {
      sdata = repo_add_repodata(repo, 0);
      if (dataend > datastart)
        repodata_extend_block(sdata, datastart, dataend - datastart);
      stubdataids[i] = sdata - repo->repodata;
      sdata->state = REPODATA_STUB;
      sdata->loadcallback = repodata_load_stub;
    }
  i = 0;
  dataiterator_init(&di, pool, repo, SOLVID_META, REPOSITORY_EXTERNAL, 0, 0);
  sdata = 0;
  while (dataiterator_step(&di))
    {
      if (di.data - repo->repodata != repodataid)
        continue;
      if (di.key->name == REPOSITORY_EXTERNAL && !di.nparents)
        {
          dataiterator_entersub(&di);
          sdata = repo->repodata + stubdataids[i++];
          xkeyname = 0;
          continue;
        }
      switch (di.key->type)
        {
        case REPOKEY_TYPE_ID:
          repodata_set_id(sdata, SOLVID_META, di.key->name, di.kv.id);
          break;
        case REPOKEY_TYPE_CONSTANTID:
          repodata_set_constantid(sdata, SOLVID_META, di.key->name, di.kv.id);
          break;
        case REPOKEY_TYPE_STR:
          repodata_set_str(sdata, SOLVID_META, di.key->name, di.kv.str);
          break;
        case REPOKEY_TYPE_VOID:
          repodata_set_void(sdata, SOLVID_META, di.key->name);
          break;
        case REPOKEY_TYPE_NUM:
          repodata_set_num(sdata, SOLVID_META, di.key->name, di.kv.num);
          break;
        case REPOKEY_TYPE_MD5:
        case REPOKEY_TYPE_SHA1:
        case REPOKEY_TYPE_SHA256:
          repodata_set_bin_checksum(sdata, SOLVID_META, di.key->name, di.key->type, (const unsigned char *)di.kv.str);
          break;
        case REPOKEY_TYPE_IDARRAY:
          repodata_add_idarray(sdata, SOLVID_META, di.key->name, di.kv.id);
          if (di.key->name == REPOSITORY_KEYS)
            {
              Repokey xkey;

              if (!xkeyname)
                {
                  if (!di.kv.eof)
                    xkeyname = di.kv.id;
                  continue;
                }
              xkey.name = xkeyname;
              xkey.type = di.kv.id;
              xkey.storage = KEY_STORAGE_INCORE;
              xkey.size = 0; 
              repodata_key2id(sdata, &xkey, 1);
              xkeyname = 0;
            }
        }
    }
  dataiterator_free(&di);
  for (i = 0; i < cnt; i++)
    repodata_internalize(repo->repodata + stubdataids[i]);
  sat_free(stubdataids);
}

/*
vim:cinoptions={.5s,g0,p5,t0,(0,^-0.5s,n-0.5s:tw=78:cindent:sw=4:
*/