/src/strongswan/src/libstrongswan/settings/settings.c

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/*
 * Copyright (C) 2010-2018 Tobias Brunner
 * Copyright (C) 2008 Martin Willi
 *
 * Copyright (C) secunet Security Networks AG
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#define _GNU_SOURCE
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>

#include "settings.h"
#include "settings_types.h"

#include "collections/array.h"
#include "collections/hashtable.h"
#include "collections/linked_list.h"
#include "threading/rwlock.h"
#include "utils/debug.h"

typedef struct private_settings_t private_settings_t;

/**
 * Parse functions provided by the generated parser.
 */
bool settings_parser_parse_file(section_t *root, char *name);
bool settings_parser_parse_string(section_t *root, char *settings);

/**
 * Private data of settings
 */
struct private_settings_t {

  /**
   * Public interface
   */
  settings_t public;

  /**
   * Top level section
   */
  section_t *top;

  /**
   * Contents of replaced settings (char*)
   *
   * FIXME: This is required because the pointer returned by get_str()
   * is not refcounted.  Might cause ever increasing usage stats.
   */
  array_t *contents;

  /**
   * Lock to safely access the settings
   */
  rwlock_t *lock;
};

/**
 * Print a format key, but consume already processed arguments
 * Note that key and start point into the same string
 */
static bool print_key(char *buf, int len, char *start, char *key, va_list args)
{
  va_list copy;
  char *pos = start;
  bool res;

  va_copy(copy, args);
  while (TRUE)
  {
    pos = memchr(pos, '%', key - pos);
    if (!pos)
    {
      break;
    }
    pos++;
    switch (*pos)
    {
      case 'd':
        va_arg(copy, int);
        break;
      case 's':
        va_arg(copy, char*);
        break;
      case 'N':
        va_arg(copy, enum_name_t*);
        va_arg(copy, int);
        break;
      case '%':
        break;
      default:
        DBG1(DBG_CFG, "settings with %%%c not supported!", *pos);
        break;
    }
    pos++;
  }
  res = vsnprintf(buf, len, key, copy) < len;
  va_end(copy);
  return res;
}

/**
 * Check if the given section is contained in the given array.
 */
static bool has_section(array_t *array, section_t *section)
{
  section_t *current;
  int i;

  for (i = 0; i < array_count(array); i++)
  {
    array_get(array, i, &current);
    if (current == section)
    {
      return TRUE;
    }
  }
  return FALSE;
}

/**
 * Find a section by a given key, using buffered key, reusable buffer.
 * If "ensure" is TRUE, the sections are created if they don't exist.
 */
static section_t *find_section_buffered(section_t *section,
          char *start, char *key, va_list args, char *buf, int len,
          bool ensure)
{
  char *pos;
  section_t *found = NULL;

  if (section == NULL)
  {
    return NULL;
  }
  pos = strchr(key, '.');
  if (pos)
  {
    *pos = '\0';
    pos++;
  }
  if (!print_key(buf, len, start, key, args))
  {
    return NULL;
  }
  if (!strlen(buf))
  {
    found = section;
  }
  else if (array_bsearch(section->sections, buf, settings_section_find,
               &found) == -1)
  {
    if (ensure)
    {
      found = settings_section_create(strdup(buf));
      settings_section_add(section, found, NULL);
    }
  }
  if (found && pos)
  {
    return find_section_buffered(found, start, pos, args, buf, len, ensure);
  }
  return found;
}

/**
 * Forward declaration
 */
static array_t *find_sections(private_settings_t *this, section_t *section,
                char *key, va_list args, array_t **sections);

/**
 * Resolve the given reference. Not thread-safe.
 * Only a vararg function to get an empty va_list.
 */
static void resolve_reference(private_settings_t *this, section_ref_t *ref,
            array_t **sections, ...)
{
  va_list args;

  va_start(args, sections);
  find_sections(this, this->top, ref->name, args, sections);
  va_end(args);
}

/**
 * Find all sections via a given key considering references, using buffered key,
 * reusable buffer.
 */
static void find_sections_buffered(private_settings_t *this, section_t *section,
                   char *start, char *key, va_list args,
                   char *buf, int len, bool ignore_refs,
                   array_t **sections)
{
  section_t *found = NULL, *reference;
  array_t *references;
  section_ref_t *ref;
  char *pos;
  int i, j;

  if (!section)
  {
    return;
  }
  pos = strchr(key, '.');
  if (pos)
  {
    *pos = '\0';
  }
  if (!print_key(buf, len, start, key, args))
  {
    return;
  }
  if (pos)
  { /* restore so we can follow references */
    *pos = '.';
  }
  if (!strlen(buf))
  {
    found = section;
  }
  else
  {
    array_bsearch(section->sections, buf, settings_section_find, &found);
  }
  if (found)
  {
    if (pos)
    {
      find_sections_buffered(this, found, start, pos+1, args, buf, len,
                   FALSE, sections);
    }
    else if (!has_section(*sections, found))
    {
      /* ignore if already added to avoid loops */
      array_insert_create(sections, ARRAY_TAIL, found);
      /* add all sections that are referenced here (also resolves
       * references in parent sections of the referenced section) */
      for (i = 0; i < array_count(found->references); i++)
      {
        array_get(found->references, i, &ref);
        resolve_reference(this, ref, sections);
      }
    }
  }
  if (!ignore_refs && section != found && section->references)
  {
    /* find matching sub-sections relative to the referenced sections */
    for (i = 0; i < array_count(section->references); i++)
    {
      array_get(section->references, i, &ref);
      references = NULL;
      resolve_reference(this, ref, &references);
      for (j = 0; j < array_count(references); j++)
      {
        array_get(references, j, &reference);
        /* ignore references in this referenced section, they were
         * resolved via resolve_reference() */
        find_sections_buffered(this, reference, start, key, args,
                     buf, len, TRUE, sections);
      }
      array_destroy(references);
    }
  }
}

/**
 * Ensure that the section with the given key exists (not thread-safe).
 */
static section_t *ensure_section(private_settings_t *this, section_t *section,
                 const char *key, va_list args)
{
  char buf[128], keybuf[512];

  if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
  {
    return NULL;
  }
  return find_section_buffered(section, keybuf, keybuf, args, buf,
                 sizeof(buf), TRUE);
}

/**
 * Find a section by a given key with resolved references (not thread-safe!).
 * The array is allocated. NULL is returned if no sections are found.
 */
static array_t *find_sections(private_settings_t *this, section_t *section,
                char *key, va_list args, array_t **sections)
{
  char buf[128], keybuf[512];

  if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
  {
    return NULL;
  }
  find_sections_buffered(this, section, keybuf, keybuf, args, buf,
               sizeof(buf), FALSE, sections);
  return *sections;
}

/**
 * Find the key/value pair for a key, using buffered key, reusable buffer
 * There are two modes: 1. To find a key at an exact location and create the
 * sections (and key/value pair) if necessary, don't pass an array for sections.
 * 2. To find a key and follow references pass a pointer to an array to store
 * visited sections. NULL is returned in this case if the key is not found.
 */
static kv_t *find_value_buffered(private_settings_t *this, section_t *section,
                 char *start, char *key, va_list args,
                 char *buf, int len, bool ignore_refs,
                 array_t **sections)
{
  section_t *found = NULL;
  kv_t *kv = NULL;
  section_ref_t *ref;
  array_t *references;
  char *pos;
  int i, j;

  if (!section)
  {
    return NULL;
  }
  pos = strchr(key, '.');
  if (pos)
  {
    *pos = '\0';
    if (!print_key(buf, len, start, key, args))
    {
      return NULL;
    }
    /* restore so we can follow references */
    *pos = '.';
    if (!strlen(buf))
    {
      found = section;
    }
    else if (array_bsearch(section->sections, buf, settings_section_find,
                 &found) == -1)
    {
      if (!sections)
      {
        found = settings_section_create(strdup(buf));
        settings_section_add(section, found, NULL);
      }
    }
    if (found)
    {
      kv = find_value_buffered(this, found, start, pos+1, args, buf, len,
                   FALSE, sections);
    }
  }
  else
  {
    if (sections)
    {
      array_insert_create(sections, ARRAY_TAIL, section);
    }
    if (!print_key(buf, len, start, key, args))
    {
      return NULL;
    }
    if (array_bsearch(section->kv, buf, settings_kv_find, &kv) == -1)
    {
      if (!sections)
      {
        kv = settings_kv_create(strdup(buf), NULL);
        settings_kv_add(section, kv, NULL);
      }
    }
  }
  if (!kv && !ignore_refs && sections && section->references)
  {
    /* find key relative to the referenced sections */
    for (i = 0; !kv && i < array_count(section->references); i++)
    {
      array_get(section->references, i, &ref);
      references = NULL;
      resolve_reference(this, ref, &references);
      for (j = 0; !kv && j < array_count(references); j++)
      {
        array_get(references, j, &found);
        /* ignore if already added to avoid loops */
        if (!has_section(*sections, found))
        {
          /* ignore references in this referenced section, they were
           * resolved via resolve_reference() */
          kv = find_value_buffered(this, found, start, key, args,
                       buf, len, TRUE, sections);
        }
      }
      array_destroy(references);
    }
  }
  return kv;
}

/**
 * Remove the key/value pair for a key, using buffered key, reusable buffer
 */
static void remove_value_buffered(private_settings_t *this, section_t *section,
                  char *start, char *key, va_list args,
                  char *buf, int len)
{
  section_t *found = NULL;
  kv_t *kv = NULL, *ordered = NULL;
  char *pos;
  int idx, i;

  if (!section)
  {
    return;
  }
  pos = strchr(key, '.');
  if (pos)
  {
    *pos = '\0';
    pos++;
  }
  if (!print_key(buf, len, start, key, args))
  {
    return;
  }
  if (!strlen(buf))
  {
    found = section;
  }
  if (pos)
  {
    if (array_bsearch(section->sections, buf, settings_section_find,
              &found) != -1)
    {
      remove_value_buffered(this, found, start, pos, args, buf, len);
    }
  }
  else
  {
    idx = array_bsearch(section->kv, buf, settings_kv_find, &kv);
    if (idx != -1)
    {
      array_remove(section->kv, idx, NULL);
      for (i = 0; i < array_count(section->kv_order); i++)
      {
        array_get(section->kv_order, i, &ordered);
        if (kv == ordered)
        {
          array_remove(section->kv_order, i, NULL);
          settings_kv_destroy(kv, this->contents);
          break;
        }
      }
    }
  }
}

/*
 * Described in header
 */
void settings_remove_value(settings_t *settings, char *key, ...)
{
  private_settings_t *this = (private_settings_t*)settings;
  char buf[128], keybuf[512];
  va_list args;

  if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
  {
    return;
  }
  va_start(args, key);

  this->lock->read_lock(this->lock);
  remove_value_buffered(this, this->top, keybuf, keybuf, args, buf,
              sizeof(buf));
  this->lock->unlock(this->lock);

  va_end(args);
}

/**
 * Find the string value for a key (thread-safe).
 */
static char *find_value(private_settings_t *this, section_t *section,
            char *key, va_list args)
{
  char buf[128], keybuf[512], *value = NULL;
  array_t *sections = NULL;
  kv_t *kv;

  if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
  {
    return NULL;
  }
  this->lock->read_lock(this->lock);
  kv = find_value_buffered(this, section, keybuf, keybuf, args,
               buf, sizeof(buf), FALSE, &sections);
  if (kv)
  {
    value = kv->value;
  }
  this->lock->unlock(this->lock);
  array_destroy(sections);
  return value;
}

/**
 * Set a value to a copy of the given string (thread-safe).
 */
static void set_value(private_settings_t *this, section_t *section,
            char *key, va_list args, char *value)
{
  char buf[128], keybuf[512];
  kv_t *kv;

  if (snprintf(keybuf, sizeof(keybuf), "%s", key) >= sizeof(keybuf))
  {
    return;
  }
  this->lock->write_lock(this->lock);
  kv = find_value_buffered(this, section, keybuf, keybuf, args,
               buf, sizeof(buf), FALSE, NULL);
  if (kv)
  {
    settings_kv_set(kv, strdupnull(value), this->contents);
  }
  this->lock->unlock(this->lock);
}

METHOD(settings_t, get_str, char*,
  private_settings_t *this, char *key, char *def, ...)
{
  char *value;
  va_list args;

  va_start(args, def);
  value = find_value(this, this->top, key, args);
  va_end(args);
  if (value)
  {
    return value;
  }
  return def;
}

/**
 * Described in header
 */
inline bool settings_value_as_bool(char *value, bool def)
{
  if (value)
  {
    if (strcaseeq(value, "1") ||
      strcaseeq(value, "yes") ||
      strcaseeq(value, "true") ||
      strcaseeq(value, "enabled"))
    {
      return TRUE;
    }
    else if (strcaseeq(value, "0") ||
         strcaseeq(value, "no") ||
         strcaseeq(value, "false") ||
         strcaseeq(value, "disabled"))
    {
      return FALSE;
    }
  }
  return def;
}

METHOD(settings_t, get_bool, bool,
  private_settings_t *this, char *key, int def, ...)
{
  char *value;
  va_list args;

  /* we can't use bool for def due to this call */
  va_start(args, def);
  value = find_value(this, this->top, key, args);
  va_end(args);
  return settings_value_as_bool(value, def);
}

/**
 * Described in header
 */
inline int settings_value_as_int(char *value, int def)
{
  int intval;
  char *end;
  int base = 10;

  if (value)
  {
    errno = 0;
    if (value[0] == '0' && value[1] == 'x')
    { /* manually detect 0x prefix as we want to avoid octal encoding */
      base = 16;
    }
    intval = strtoul(value, &end, base);
    if (errno == 0 && *end == 0 && end != value)
    {
      return intval;
    }
  }
  return def;
}

METHOD(settings_t, get_int, int,
  private_settings_t *this, char *key, int def, ...)
{
  char *value;
  va_list args;

  va_start(args, def);
  value = find_value(this, this->top, key, args);
  va_end(args);
  return settings_value_as_int(value, def);
}

/**
 * Described in header
 */
inline uint64_t settings_value_as_uint64(char *value, uint64_t def)
{
  uint64_t intval;
  char *end;
  int base = 10;

  if (value)
  {
    errno = 0;
    if (value[0] == '0' && value[1] == 'x')
    { /* manually detect 0x prefix as we want to avoid octal encoding */
      base = 16;
    }
    intval = strtoull(value, &end, base);
    if (errno == 0 && *end == 0 && end != value)
    {
      return intval;
    }
  }
  return def;
}

/**
 * Described in header
 */
inline double settings_value_as_double(char *value, double def)
{
  double dval;
  char *end;

  if (value)
  {
    errno = 0;
    dval = strtod(value, &end);
    if (errno == 0 && *end == 0 && end != value)
    {
      return dval;
    }
  }
  return def;
}

METHOD(settings_t, get_double, double,
  private_settings_t *this, char *key, double def, ...)
{
  char *value;
  va_list args;

  va_start(args, def);
  value = find_value(this, this->top, key, args);
  va_end(args);
  return settings_value_as_double(value, def);
}

/**
 * Described in header
 */
inline uint32_t settings_value_as_time(char *value, uint32_t def)
{
  time_t val;

  if (timespan_from_string(value, NULL, &val))
  {
    return val;
  }
  return def;
}

METHOD(settings_t, get_time, uint32_t,
  private_settings_t *this, char *key, uint32_t def, ...)
{
  char *value;
  va_list args;

  va_start(args, def);
  value = find_value(this, this->top, key, args);
  va_end(args);
  return settings_value_as_time(value, def);
}

METHOD(settings_t, set_str, void,
  private_settings_t *this, char *key, char *value, ...)
{
  va_list args;
  va_start(args, value);
  set_value(this, this->top, key, args, value);
  va_end(args);
}

METHOD(settings_t, set_bool, void,
  private_settings_t *this, char *key, int value, ...)
{
  va_list args;
  /* we can't use bool for value due to this call */
  va_start(args, value);
  set_value(this, this->top, key, args, value ? "1" : "0");
  va_end(args);
}

METHOD(settings_t, set_int, void,
  private_settings_t *this, char *key, int value, ...)
{
  char val[16];
  va_list args;
  va_start(args, value);
  if (snprintf(val, sizeof(val), "%d", value) < sizeof(val))
  {
    set_value(this, this->top, key, args, val);
  }
  va_end(args);
}

METHOD(settings_t, set_double, void,
  private_settings_t *this, char *key, double value, ...)
{
  char val[64];
  va_list args;
  va_start(args, value);
  if (snprintf(val, sizeof(val), "%f", value) < sizeof(val))
  {
    set_value(this, this->top, key, args, val);
  }
  va_end(args);
}

METHOD(settings_t, set_time, void,
  private_settings_t *this, char *key, uint32_t value, ...)
{
  char val[16];
  va_list args;
  va_start(args, value);
  if (snprintf(val, sizeof(val), "%u", value) < sizeof(val))
  {
    set_value(this, this->top, key, args, val);
  }
  va_end(args);
}

METHOD(settings_t, set_default_str, bool,
  private_settings_t *this, char *key, char *value, ...)
{
  char *old;
  va_list args;

  va_start(args, value);
  old = find_value(this, this->top, key, args);
  va_end(args);

  if (!old)
  {
    va_start(args, value);
    set_value(this, this->top, key, args, value);
    va_end(args);
    return TRUE;
  }
  return FALSE;
}

/**
 * Data for enumerators
 */
typedef struct {
  /** settings_t instance */
  private_settings_t *settings;
  /** sections to enumerate */
  array_t *sections;
  /** sections/keys that were already enumerated */
  hashtable_t *seen;
} enumerator_data_t;

CALLBACK(enumerator_destroy, void,
  enumerator_data_t *this)
{
  this->settings->lock->unlock(this->settings->lock);
  this->seen->destroy(this->seen);
  array_destroy(this->sections);
  free(this);
}

CALLBACK(section_filter, bool,
  hashtable_t *seen, enumerator_t *orig, va_list args)
{
  section_t *section;
  char **out;

  VA_ARGS_VGET(args, out);

  while (orig->enumerate(orig, &section))
  {
    if (seen->get(seen, section->name))
    {
      continue;
    }
    *out = section->name;
    seen->put(seen, section->name, section->name);
    return TRUE;
  }
  return FALSE;
}

/**
 * Enumerate sections of the given section
 */
static enumerator_t *section_enumerator(section_t *section,
                    enumerator_data_t *data)
{
  return enumerator_create_filter(
              array_create_enumerator(section->sections_order),
              section_filter, data->seen, NULL);
}

METHOD(settings_t, create_section_enumerator, enumerator_t*,
  private_settings_t *this, char *key, ...)
{
  enumerator_data_t *data;
  array_t *sections = NULL;
  va_list args;

  this->lock->read_lock(this->lock);
  va_start(args, key);
  sections = find_sections(this, this->top, key, args, &sections);
  va_end(args);

  if (!sections)
  {
    this->lock->unlock(this->lock);
    return enumerator_create_empty();
  }
  INIT(data,
    .settings = this,
    .sections = sections,
    .seen = hashtable_create(hashtable_hash_str, hashtable_equals_str, 8),
  );
  return enumerator_create_nested(array_create_enumerator(sections),
            (void*)section_enumerator, data, enumerator_destroy);
}

CALLBACK(kv_filter, bool,
  hashtable_t *seen, enumerator_t *orig, va_list args)
{
  kv_t *kv;
  char **key, **value;

  VA_ARGS_VGET(args, key, value);

  while (orig->enumerate(orig, &kv))
  {
    if (seen->get(seen, kv->key))
    {
      continue;
    }
    seen->put(seen, kv->key, kv->key);
    if (!kv->value)
    {
      continue;
    }
    *key = kv->key;
    *value = kv->value;
    return TRUE;
  }
  return FALSE;
}

/**
 * Enumerate key/value pairs of the given section
 */
static enumerator_t *kv_enumerator(section_t *section, enumerator_data_t *data)
{
  return enumerator_create_filter(array_create_enumerator(section->kv_order),
                  kv_filter, data->seen, NULL);
}

METHOD(settings_t, create_key_value_enumerator, enumerator_t*,
  private_settings_t *this, char *key, ...)
{
  enumerator_data_t *data;
  array_t *sections = NULL;
  va_list args;

  this->lock->read_lock(this->lock);
  va_start(args, key);
  sections = find_sections(this, this->top, key, args, &sections);
  va_end(args);

  if (!sections)
  {
    this->lock->unlock(this->lock);
    return enumerator_create_empty();
  }
  INIT(data,
    .settings = this,
    .sections = sections,
    .seen = hashtable_create(hashtable_hash_str, hashtable_equals_str, 8),
  );
  return enumerator_create_nested(array_create_enumerator(sections),
          (void*)kv_enumerator, data, (void*)enumerator_destroy);
}

METHOD(settings_t, add_fallback, void,
  private_settings_t *this, const char *key, const char *fallback, ...)
{
  section_t *section;
  va_list args;
  char buf[512];

  this->lock->write_lock(this->lock);
  va_start(args, fallback);
  section = ensure_section(this, this->top, key, args);
  va_end(args);

  va_start(args, fallback);
  if (section && vsnprintf(buf, sizeof(buf), fallback, args) < sizeof(buf))
  {
    settings_reference_add(section, strdup(buf), TRUE);
  }
  va_end(args);
  this->lock->unlock(this->lock);
}

/**
 * Load settings from files matching the given file pattern or from a string.
 * All files (even included ones) have to be loaded successfully.
 */
static section_t *load_internal(char *pattern, bool string)
{
  section_t *section;
  bool loaded;

  if (pattern == NULL || !pattern[0])
  {
    return settings_section_create(NULL);
  }

  section = settings_section_create(NULL);
  loaded = string ? settings_parser_parse_string(section, pattern) :
            settings_parser_parse_file(section, pattern);
  if (!loaded)
  {
    settings_section_destroy(section, NULL);
    section = NULL;
  }
  return section;
}

/**
 * Add sections and values in "section" relative to "parent".
 * If merge is FALSE the contents of parent are replaced with the parsed
 * contents, otherwise they are merged together.
 *
 * Releases the write lock and destroys the given section.
 * If parent is NULL this is all that happens.
 */
static bool extend_section(private_settings_t *this, section_t *parent,
               section_t *section, bool merge)
{
  if (parent)
  {
    settings_section_extend(parent, section, this->contents, !merge);
  }
  this->lock->unlock(this->lock);
  settings_section_destroy(section, NULL);
  return parent != NULL;
}

METHOD(settings_t, load_files, bool,
  private_settings_t *this, char *pattern, bool merge)
{
  section_t *section;

  section = load_internal(pattern, FALSE);
  if (!section)
  {
    return FALSE;
  }

  this->lock->write_lock(this->lock);
  return extend_section(this, this->top, section, merge);
}

METHOD(settings_t, load_files_section, bool,
  private_settings_t *this, char *pattern, bool merge, char *key, ...)
{
  section_t *section, *parent;
  va_list args;

  section = load_internal(pattern, FALSE);
  if (!section)
  {
    return FALSE;
  }

  this->lock->write_lock(this->lock);

  va_start(args, key);
  parent = ensure_section(this, this->top, key, args);
  va_end(args);

  return extend_section(this, parent, section, merge);
}

METHOD(settings_t, load_string, bool,
  private_settings_t *this, char *settings, bool merge)
{
  section_t *section;

  section = load_internal(settings, TRUE);
  if (!section)
  {
    return FALSE;
  }

  this->lock->write_lock(this->lock);
  return extend_section(this, this->top, section, merge);
}

METHOD(settings_t, load_string_section, bool,
  private_settings_t *this, char *settings, bool merge, char *key, ...)
{
  section_t *section, *parent;
  va_list args;

  section = load_internal(settings, TRUE);
  if (!section)
  {
    return FALSE;
  }

  this->lock->write_lock(this->lock);

  va_start(args, key);
  parent = ensure_section(this, this->top, key, args);
  va_end(args);

  return extend_section(this, parent, section, merge);
}

CALLBACK(clear_content, void,
  char *str, int idx, void *clear)
{
  if (*(bool*)clear)
  {
    memwipe(str, strlen(str));
  }
  free(str);
}

/**
 * Destroy the settings object and optionally clear content memory
 */
static void destroy_settings(private_settings_t *this, bool clear)
{
  settings_section_destroy(this->top, clear ? this->contents : NULL);
  array_destroy_function(this->contents, clear_content, &clear);
  this->lock->destroy(this->lock);
  free(this);
}

METHOD(settings_t, destroy, void,
  private_settings_t *this)
{
  destroy_settings(this, FALSE);
}

METHOD(settings_t, destroy_clear, void,
  private_settings_t *this)
{
  destroy_settings(this, TRUE);
}

static private_settings_t *settings_create_base()
{
  private_settings_t *this;

  INIT(this,
    .public = {
      .get_str = _get_str,
      .get_int = _get_int,
      .get_double = _get_double,
      .get_time = _get_time,
      .get_bool = _get_bool,
      .set_str = _set_str,
      .set_int = _set_int,
      .set_double = _set_double,
      .set_time = _set_time,
      .set_bool = _set_bool,
      .set_default_str = _set_default_str,
      .create_section_enumerator = _create_section_enumerator,
      .create_key_value_enumerator = _create_key_value_enumerator,
      .add_fallback = _add_fallback,
      .load_files = _load_files,
      .load_files_section = _load_files_section,
      .load_string = _load_string,
      .load_string_section = _load_string_section,
      .destroy = _destroy,
      .destroy_clear = _destroy_clear,
    },
    .top = settings_section_create(NULL),
    .contents = array_create(0, 0),
    .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
  );
  return this;
}

/*
 * see header file
 */
settings_t *settings_create(char *file)
{
  private_settings_t *this = settings_create_base();

  load_files(this, file, FALSE);

  return &this->public;
}

/*
 * see header file
 */
settings_t *settings_create_string(char *settings)
{
  private_settings_t *this = settings_create_base();

  load_string(this, settings, FALSE);

  return &this->public;
}

Coverage Report

Created: 2024-02-29 06:05