pkg_hash.c

this is the pkg installer for linux

		       latest_matching->name, latest_matching->version, latest_matching->architecture);
	  return latest_matching;
     }
     return NULL;
}

static int pkg_name_constraint_fcn(pkg_t *pkg, void *cdata)
{
     const char *name = (const char *)cdata;
     if (strcmp(pkg->name, name) == 0)
	  return 1;
     else
	  return 0;   
}

pkg_t *pkg_hash_fetch_best_installation_candidate_by_name(ipkg_conf_t *conf, const char *name)
{
     hash_table_t *hash = &conf->pkg_hash;
     abstract_pkg_t *apkg = NULL;

     if (!(apkg = abstract_pkg_fetch_by_name(hash, name)))
	  return NULL;
     
     return pkg_hash_fetch_best_installation_candidate(conf, apkg, pkg_name_constraint_fcn, apkg->name, 0);
}


pkg_t * pkg_hash_fetch_by_name_version(hash_table_t *hash, 
				       const char *pkg_name,
				       const char * version)
{
    pkg_vec_t * vec;
    register int i;
    char *version_str = NULL;
    
    if(!(vec = pkg_vec_fetch_by_name(hash, pkg_name)))
	return NULL;
    
    for(i = 0; i < vec->len; i++) {
	version_str = pkg_version_str_alloc(vec->pkgs[i]);
	if(!strcmp(version_str, version)) {
	    free(version_str);
	    break;
	}
	free(version_str);
    }
	
    if(i == vec->len)
	return NULL;
    
    return vec->pkgs[i];
}

pkg_t *pkg_hash_fetch_installed_by_name_dest(hash_table_t *hash,
					     const char *pkg_name,
					     pkg_dest_t *dest)
{
    pkg_vec_t * vec;
    register int i;

    if(!(vec = pkg_vec_fetch_by_name(hash, pkg_name))) {
	return NULL;
    }
    
    for(i = 0; i < vec->len; i++)
	if((vec->pkgs[i]->state_status == SS_INSTALLED || vec->pkgs[i]->state_status == SS_UNPACKED) && vec->pkgs[i]->dest == dest) {
	    return vec->pkgs[i];
        }
    return NULL;
}

pkg_t *pkg_hash_fetch_installed_by_name(hash_table_t *hash,
					const char *pkg_name)
{
    pkg_vec_t * vec;
    register int i;

    if(!(vec = pkg_vec_fetch_by_name(hash, pkg_name))){
	return NULL;
    } 

    for(i = 0; i < vec->len; i++)
	if (vec->pkgs[i]->state_status == SS_INSTALLED || vec->pkgs[i]->state_status == SS_UNPACKED){
	    return vec->pkgs[i];
        } 
    
    return NULL;
}

pkg_vec_t *pkg_vec_fetch_by_name(hash_table_t *hash, const char *pkg_name)
{
    abstract_pkg_t * ab_pkg;

    if(!(ab_pkg = abstract_pkg_fetch_by_name(hash, pkg_name))){
       return NULL;
    }
    
    if (ab_pkg->pkgs) {
      return ab_pkg->pkgs;
    } else if (ab_pkg->provided_by) {
      abstract_pkg_t *abpkg =  abstract_pkg_vec_get(ab_pkg->provided_by, 0);
      if (abpkg != NULL){
	  return abpkg->pkgs;
      } else {
	  return ab_pkg->pkgs;
      }
    } else {
      return NULL;
    }
}

static int pkg_compare_names(const void *p1, const void *p2)
{
  const pkg_t *pkg1 = *(const pkg_t **)p1;
  const pkg_t *pkg2 = *(const pkg_t **)p2;
  if (pkg1->name == NULL)
    return 1;
  if (pkg2->name == NULL)
    return -1;
  return(strcmp(pkg1->name, pkg2->name));
}


static void pkg_hash_fetch_available_helper(const char *pkg_name, void *entry, void *data)
{
  int j;
  abstract_pkg_t *ab_pkg = (abstract_pkg_t *)entry;
  pkg_vec_t *all = (pkg_vec_t *)data;
  pkg_vec_t *pkg_vec = ab_pkg->pkgs;
  if (pkg_vec) {
    for (j = 0; j < pkg_vec->len; j++) {
      pkg_t *pkg = pkg_vec->pkgs[j];
      pkg_vec_insert(all, pkg);
    }
  }
}

void pkg_hash_fetch_available(hash_table_t *hash, pkg_vec_t *all)
{
    hash_table_foreach(hash, pkg_hash_fetch_available_helper, all);
    qsort(all->pkgs, all->len, sizeof(pkg_t *), pkg_compare_names);
}

static void pkg_hash_fetch_all_installed_helper(const char *pkg_name, void *entry, void *data)
{
  abstract_pkg_t *ab_pkg = (abstract_pkg_t *)entry;
  pkg_vec_t *all = (pkg_vec_t *)data;
  pkg_vec_t *pkg_vec = ab_pkg->pkgs;
  int j;
  if (pkg_vec) {
    for (j = 0; j < pkg_vec->len; j++) {
      pkg_t *pkg = pkg_vec->pkgs[j];
      if (pkg->state_status == SS_INSTALLED || pkg->state_status == SS_UNPACKED) {
	pkg_vec_insert(all, pkg);
      }
    }
  }
}
void pkg_hash_fetch_all_installed(hash_table_t *hash, pkg_vec_t *all)
{
    hash_table_foreach(hash, pkg_hash_fetch_all_installed_helper, all);
    qsort(all->pkgs, all->len, sizeof(void*), pkg_compare_names);
}

static void pkg_hash_dump_helper(const char *pkg_name, void *entry, void *data)
{
  int i;
  pkg_t *pkg;
  abstract_pkg_t *ab_pkg = (abstract_pkg_t *)entry;
  ipkg_conf_t *conf = (ipkg_conf_t *)data;
  abstract_pkg_t ** dependents = ab_pkg->depended_upon_by;
  fprintf(stdout, "%s\n", ab_pkg->name);
  i = 0;
  if (dependents != NULL)
    while (dependents [i] != NULL)
      printf ("\tdepended upon by - %s\n", dependents [i ++]->name);
  dependents = ab_pkg->provided_by->pkgs;
  i = 0;
  if (dependents != NULL)
    while (dependents [i] != NULL && i < ab_pkg->provided_by->len)
      printf ("\tprovided by - %s\n", dependents [i ++]->name);
  pkg = pkg_hash_fetch_best_installation_candidate_by_name (conf, ab_pkg->name);
  if (pkg) {
    i = 0;
    while (i < pkg->depends_count)
      printf ("\tdepends on - %s\n", pkg->depends_str [i ++]);	
  }
}
void pkg_hash_dump(hash_table_t *hash, void *data)
{

  printf ("\n\n+=+%s+=+\n\n", __FUNCTION__);
  hash_table_foreach(hash, pkg_hash_dump_helper, data);
  printf ("\n+=+%s+=+\n\n", __FUNCTION__);    
}

abstract_pkg_t * ensure_abstract_pkg_by_name(hash_table_t * hash, const char * pkg_name)
{
  abstract_pkg_t * ab_pkg;

  if(!(ab_pkg = abstract_pkg_fetch_by_name(hash, pkg_name)))
    ab_pkg = add_new_abstract_pkg_by_name(hash, pkg_name);

  return ab_pkg;
}

pkg_t *hash_insert_pkg(hash_table_t *hash, pkg_t *pkg, int set_status,ipkg_conf_t *conf)
{
     abstract_pkg_t * ab_pkg;
     int arch_priority;

     if(!pkg)
	  return pkg;

     arch_priority = pkg->arch_priority;

     if (buildDepends(hash, pkg)<0){
        fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
        return NULL;
     }
     ab_pkg = ensure_abstract_pkg_by_name(hash, pkg->name);

     if (set_status) {
	  if (pkg->state_status == SS_INSTALLED) {
	       ab_pkg->state_status = SS_INSTALLED;
	  } else if (pkg->state_status == SS_UNPACKED) {
	       ab_pkg->state_status = SS_UNPACKED;
	  }
     }

     if(!ab_pkg->pkgs)
	  ab_pkg->pkgs = pkg_vec_alloc();
    
     /* pkg_vec_insert_merge might munge package, but it returns an unmunged pkg */
     pkg = pkg_vec_insert_merge(ab_pkg->pkgs, pkg, set_status,conf );
     pkg->parent = ab_pkg;

     if (buildProvides(hash, ab_pkg, pkg)<0){
        fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
        return NULL;
     }
     /* need to build the conflicts graph before replaces for correct calculation of replaced_by relation */
     if (buildConflicts(hash, ab_pkg, pkg)<0){
        fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
        return NULL;
     }
     if (buildReplaces(hash, ab_pkg, pkg)<0) {
        fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
        return NULL;
     }
    
     buildDependedUponBy(pkg, ab_pkg);
     return pkg;
}

/*
 * this will assume that we've already determined that
 * the abstract pkg doesn't exist, 'cause we should know these things...
 */
static abstract_pkg_t * add_new_abstract_pkg_by_name(hash_table_t * hash, const char * pkg_name)
{
  abstract_pkg_t * ab_pkg;

  ab_pkg = abstract_pkg_new();
  if (ab_pkg == NULL) { return NULL; }

  ab_pkg->name = strdup(pkg_name);
  hash_table_insert(hash, pkg_name, ab_pkg);

  return ab_pkg;
}


pkg_t *file_hash_get_file_owner(ipkg_conf_t *conf, const char *file_name)
{
     hash_table_t *file_hash = &conf->file_hash;

     return hash_table_get(file_hash, file_name); 
}

int file_hash_set_file_owner(ipkg_conf_t *conf, const char *file_name, pkg_t *owning_pkg)
{
     hash_table_t *file_hash = &conf->file_hash;
     pkg_t *old_owning_pkg = hash_table_get(file_hash, file_name);
     int file_name_len = strlen(file_name);

     if (file_name[file_name_len -1] == '/')
	  return 0;

     if (conf->offline_root) {
	  int len = strlen(conf->offline_root);
	  if (strncmp(file_name, conf->offline_root, len) == 0) {
	       file_name += len;
	  }
     }

     // ipkg_message(conf, IPKG_DEBUG2, "owning_pkg=%s filename=%s\n", owning_pkg->name, file_name);
     hash_table_insert(file_hash, file_name, owning_pkg); 
     if (old_owning_pkg) {
	  str_list_remove_elt(old_owning_pkg->installed_files, file_name);
	  /* mark this package to have its filelist written */
	  old_owning_pkg->state_flag |= SF_FILELIST_CHANGED;
	  owning_pkg->state_flag |= SF_FILELIST_CHANGED;
     }
     return 0;
}