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/*
* stardict.c: StarDict API
*
* Copyright (c) 2013, Přemysl Janouch <p.janouch@gmail.com>
* All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <glib.h>
#include <gio/gio.h>
#include "stardict.h"
/** Describes a single entry in the dictionary index. */
typedef struct stardict_index_entry StardictIndexEntry;
/** Describes a single entry in the synonyms index. */
typedef struct stardict_synonym_entry StardictSynonymEntry;
/** Helper class for reading .ifo files. */
typedef struct ifo_reader IfoReader;
typedef enum stardict_version StardictVersion;
enum stardict_version { SD_VERSION_2_4_2, SD_VERSION_3_0_0 };
struct stardict_info
{
gchar * path;
StardictVersion version;
gchar * book_name;
gulong word_count;
gulong syn_word_count;
gulong idx_filesize;
gulong idx_offset_bits;
gchar * author;
gchar * email;
gchar * website;
gchar * description;
gchar * date;
gchar * same_type_sequence;
};
struct stardict_index_entry
{
gchar * name; //!< The word in utf-8
guint64 data_offset; //!< Offset of the definition
guint32 data_size; //!< Size of the definition
};
struct stardict_synonym_entry
{
gchar * word; //!< A synonymous word
guint32 original_word; //!< The original word's index
};
struct ifo_reader
{
gchar * data; //!< File data terminated with \0
gchar * data_end; //!< Where the final \0 char. is
gchar * start; //!< Start of the current token
gchar * key; //!< The key (points into @a data)
gchar * value; //!< The value (points into @a data)
};
// --- Utilities ---------------------------------------------------------------
/** Read the whole stream into a byte array. */
static gboolean
stream_read_all (GByteArray *ba, GInputStream *is, GError **error)
{
guint8 buffer[1024 * 64];
gsize bytes_read;
while (g_input_stream_read_all (is, buffer, sizeof buffer,
&bytes_read, NULL, error))
{
g_byte_array_append (ba, buffer, bytes_read);
if (bytes_read < sizeof buffer)
return TRUE;
}
return FALSE;
}
/** Read a null-terminated string from a data input stream. */
static gchar *
stream_read_string (GDataInputStream *dis, GError **error)
{
gsize length;
gchar *s = g_data_input_stream_read_upto (dis, "", 1, &length, NULL, error);
if (!s)
return NULL;
GError *err = NULL;
g_data_input_stream_read_byte (dis, NULL, &err);
if (err)
{
g_free (s);
g_propagate_error (error, err);
return NULL;
}
return s;
}
/** String compare function used for StarDict indexes. */
static inline gint
stardict_strcmp (const gchar *s1, const gchar *s2)
{
gint a;
a = g_ascii_strcasecmp (s1, s2);
return a ? a : strcmp (s1, s2);
}
/** After this statement, the element has been found and its index is stored
* in the variable "imid". */
#define BINARY_SEARCH_BEGIN(max, compare) \
gint imin = 0, imax = max, imid; \
while (imin <= imax) { \
imid = imin + (imax - imin) / 2; \
gint cmp = compare; \
if (cmp > 0) imin = imid + 1; \
else if (cmp < 0) imax = imid - 1; \
else {
/** After this statement, the binary search has failed and "imin" stores
* the position where the element can be inserted. */
#define BINARY_SEARCH_END \
} \
}
// --- Errors ------------------------------------------------------------------
GQuark
stardict_error_quark (void)
{
return g_quark_from_static_string ("stardict-error-quark");
}
// --- IFO reader --------------------------------------------------------------
static gboolean
ifo_reader_init (IfoReader *ir, const gchar *path, GError **error)
{
gsize length;
gchar *contents;
if (!g_file_get_contents (path, &contents, &length, error))
return FALSE;
static const char first_line[] = "StarDict's dict ifo file\n";
if (length < sizeof first_line - 1
|| strncmp (contents, first_line, sizeof first_line - 1))
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: invalid header format", path);
return FALSE;
}
ir->data = contents;
ir->start = contents + sizeof first_line - 1;
ir->data_end = contents + length;
return TRUE;
}
static void
ifo_reader_free (IfoReader *ir)
{
g_free (ir->data);
}
static gint
ifo_reader_read (IfoReader *ir)
{
ir->key = NULL;
ir->value = NULL;
gchar *p;
for (p = ir->start; p < ir->data_end; p++)
{
if (*p == '\n')
{
if (!ir->key)
return -1;
*p = 0;
ir->value = ir->start;
ir->start = p + 1;
return 1;
}
if (*p == '=')
{
if (p == ir->start)
return -1;
*p = 0;
ir->key = ir->start;
ir->start = p + 1;
}
}
if (!ir->key)
{
if (p != ir->start)
return -1;
return 0;
}
ir->value = ir->start;
ir->start = p;
return 1;
}
// --- StardictInfo ------------------------------------------------------------
/** Return the filesystem path for the dictionary. */
const gchar *
stardict_info_get_path (StardictInfo *sdi)
{
return sdi->path;
}
/** Return the name of the dictionary. */
const gchar *
stardict_info_get_book_name (StardictInfo *sdi)
{
return sdi->book_name;
}
/** Return the word count of the dictionary. Note that this information comes
* from the .ifo file, while the dictionary could successfully load with
* a different count of word entries.
*/
gsize
stardict_info_get_word_count (StardictInfo *sdi)
{
return sdi->word_count;
}
/** Destroy the dictionary info object. */
void
stardict_info_free (StardictInfo *sdi)
{
g_free (sdi->path);
g_free (sdi->book_name);
g_free (sdi->author);
g_free (sdi->email);
g_free (sdi->website);
g_free (sdi->description);
g_free (sdi->date);
g_free (sdi->same_type_sequence);
g_free (sdi);
}
#define DEFINE_IFO_KEY(n, t, e) { (n), IFO_##t, offsetof (StardictInfo, e) }
static gboolean
load_ifo (StardictInfo *sti, const gchar *path, GError **error)
{
IfoReader ir;
if (!ifo_reader_init (&ir, path, error))
return FALSE;
gboolean ret_val = FALSE;
memset (sti, 0, sizeof *sti);
if (ifo_reader_read (&ir) != 1 || strcmp (ir.key, "version"))
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: version not specified", path);
goto error;
}
if (!strcmp (ir.value, "2.4.2"))
sti->version = SD_VERSION_2_4_2;
else if (!strcmp (ir.value, "3.0.0"))
sti->version = SD_VERSION_3_0_0;
else
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: invalid version: %s", path, ir.value);
goto error;
}
static const struct
{
const gchar *name;
enum { IFO_STRING, IFO_NUMBER } type;
size_t offset;
}
ifo_keys[] =
{
DEFINE_IFO_KEY ("bookname", STRING, book_name),
DEFINE_IFO_KEY ("wordcount", NUMBER, word_count),
DEFINE_IFO_KEY ("synwordcount", NUMBER, syn_word_count),
DEFINE_IFO_KEY ("idxfilesize", NUMBER, idx_filesize),
DEFINE_IFO_KEY ("idxoffsetbits", NUMBER, idx_offset_bits),
DEFINE_IFO_KEY ("author", STRING, author),
DEFINE_IFO_KEY ("email", STRING, email),
DEFINE_IFO_KEY ("website", STRING, website),
DEFINE_IFO_KEY ("description", STRING, description),
DEFINE_IFO_KEY ("date", STRING, date),
DEFINE_IFO_KEY ("sametypesequence", STRING, same_type_sequence)
};
gint ret;
while ((ret = ifo_reader_read (&ir)) == 1)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (ifo_keys); i++)
if (!strcmp (ir.key, ifo_keys[i].name))
break;
if (i == G_N_ELEMENTS (ifo_keys))
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: unknown key, ignoring: %s", path, ir.key);
continue;
}
if (ifo_keys[i].type == IFO_STRING)
{
G_STRUCT_MEMBER (gchar *, sti, ifo_keys[i].offset)
= g_strdup (ir.value);
continue;
}
// Otherwise it has to be IFO_NUMBER
gchar *end;
gulong wc = strtol (ir.value, &end, 10);
if (*end)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: invalid integer", path);
goto error;
}
G_STRUCT_MEMBER (gulong, sti, ifo_keys[i].offset) = wc;
}
if (ret == -1)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: option format error", path);
goto error;
}
ret_val = TRUE;
// FIXME check for zeros, don't assume that 0 means for "not set"
if (!sti->book_name || !*sti->book_name)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: no book name specified\n", path);
ret_val = FALSE;
}
if (!sti->word_count)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: word count not specified\n", path);
ret_val = FALSE;
}
if (!sti->idx_filesize)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: .idx file size not specified\n", path);
ret_val = FALSE;
}
if (!sti->idx_offset_bits)
sti->idx_offset_bits = 32;
else if (sti->idx_offset_bits != 32 && sti->idx_offset_bits != 64)
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"%s: wrong index offset bits: %lu\n", path, sti->idx_offset_bits);
ret_val = FALSE;
}
error:
if (!ret_val)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (ifo_keys); i++)
if (ifo_keys[i].type == IFO_STRING)
g_free (G_STRUCT_MEMBER (gchar *, sti, ifo_keys[i].offset));
}
else
sti->path = g_strdup (path);
ifo_reader_free (&ir);
return ret_val;
}
/** List all dictionary files located in a path.
* @return GList<StardictInfo *>. Deallocate the list with:
* @code
* g_list_free_full ((GDestroyNotify) stardict_info_free);
* @endcode
*/
GList *
stardict_list_dictionaries (const gchar *path)
{
GPatternSpec *ps = g_pattern_spec_new ("*.ifo");
GDir *dir = g_dir_open (path, 0, NULL);
g_return_val_if_fail (dir != NULL, NULL);
GList *dicts = NULL;
const gchar *name;
while ((name = g_dir_read_name (dir)))
{
if (!g_pattern_match_string (ps, name))
continue;
gchar *filename = g_build_filename (path, name, NULL);
StardictInfo *ifo = g_new (StardictInfo, 1);
if (load_ifo (ifo, filename, NULL))
dicts = g_list_append (dicts, ifo);
else
g_free (ifo);
g_free (filename);
}
g_dir_close (dir);
g_pattern_spec_free (ps);
return dicts;
}
// --- StardictDict ------------------------------------------------------------
G_DEFINE_TYPE (StardictDict, stardict_dict, G_TYPE_OBJECT)
static void
stardict_dict_finalize (GObject *self)
{
StardictDict *sd = STARDICT_DICT (self);
stardict_info_free (sd->info);
g_array_free (sd->index, TRUE);
g_array_free (sd->synonyms, TRUE);
if (sd->mapped_dict)
g_mapped_file_unref (sd->mapped_dict);
else
g_free (sd->dict);
G_OBJECT_CLASS (stardict_dict_parent_class)->finalize (self);
}
static void
stardict_dict_class_init (StardictDictClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = stardict_dict_finalize;
}
static void
stardict_dict_init (G_GNUC_UNUSED StardictDict *sd)
{
}
/** Load a StarDict dictionary.
* @param[in] filename Path to the .ifo file
*/
StardictDict *
stardict_dict_new (const gchar *filename, GError **error)
{
StardictInfo *ifo = g_new (StardictInfo, 1);
if (!load_ifo (ifo, filename, error))
{
g_free (ifo);
return NULL;
}
StardictDict *sd = stardict_dict_new_from_info (ifo, error);
if (!sd) stardict_info_free (ifo);
return sd;
}
/** Return information about a loaded dictionary. */
StardictInfo *
stardict_dict_get_info (StardictDict *sd)
{
g_return_val_if_fail (STARDICT_IS_DICT (sd), NULL);
return sd->info;
}
/** Load a StarDict index from a GIO input stream. */
static gboolean
load_idx_internal (StardictDict *sd, GInputStream *is, GError **error)
{
GDataInputStream *dis = g_data_input_stream_new (G_INPUT_STREAM (is));
g_data_input_stream_set_byte_order (dis,
G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
StardictIndexEntry entry;
GError *err = NULL;
// Ignoring "wordcount", just reading as long as we can
while ((entry.name = stream_read_string (dis, &err)))
{
if (sd->info->idx_offset_bits == 32)
entry.data_offset
= g_data_input_stream_read_uint32 (dis, NULL, &err);
else
entry.data_offset
= g_data_input_stream_read_uint64 (dis, NULL, &err);
if (err)
goto error;
entry.data_size = g_data_input_stream_read_uint32 (dis, NULL, &err);
if (err)
goto error;
g_array_append_val (sd->index, entry);
}
if (err != NULL)
goto error;
g_object_unref (dis);
return TRUE;
error:
g_propagate_error (error, err);
g_free (entry.name);
g_object_unref (dis);
return FALSE;
}
/** Load a StarDict index. */
static gboolean
load_idx (StardictDict *sd, const gchar *filename,
gboolean gzipped, GError **error)
{
gboolean ret_val = FALSE;
GFile *file = g_file_new_for_path (filename);
GFileInputStream *fis = g_file_read (file, NULL, error);
if (!fis)
goto cannot_open;
if (gzipped)
{
GZlibDecompressor *zd
= g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
GInputStream *cis = g_converter_input_stream_new
(G_INPUT_STREAM (fis), G_CONVERTER (zd));
ret_val = load_idx_internal (sd, cis, error);
g_object_unref (cis);
g_object_unref (zd);
}
else
ret_val = load_idx_internal (sd, G_INPUT_STREAM (fis), error);
g_object_unref (fis);
cannot_open:
g_object_unref (file);
return ret_val;
}
static gboolean
load_syn (StardictDict *sd, const gchar *filename, GError **error)
{
gboolean ret_val = FALSE;
GFile *file = g_file_new_for_path (filename);
GFileInputStream *fis = g_file_read (file, NULL, error);
if (!fis)
goto cannot_open;
GDataInputStream *dis = g_data_input_stream_new (G_INPUT_STREAM (fis));
g_data_input_stream_set_byte_order (dis,
G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
StardictSynonymEntry entry;
GError *err = NULL;
// Ignoring "synwordcount", just reading as long as we can
while ((entry.word = stream_read_string (dis, &err)))
{
entry.original_word = g_data_input_stream_read_uint32 (dis, NULL, &err);
if (err)
break;
g_array_append_val (sd->synonyms, entry);
}
if (err != NULL)
{
g_free (entry.word);
g_propagate_error (error, err);
}
else
ret_val = TRUE;
g_object_unref (dis);
g_object_unref (fis);
cannot_open:
g_object_unref (file);
return ret_val;
}
/** Destroy an index entry. */
static void
index_destroy_cb (gpointer sde)
{
StardictIndexEntry *e = sde;
g_free (e->name);
}
/** Destroy a synonym entry. */
static void
syn_destroy_cb (gpointer sde)
{
StardictSynonymEntry *e = sde;
g_free (e->word);
}
/** Load StarDict dictionary data. */
static gboolean
load_dict (StardictDict *sd, const gchar *filename, gboolean gzipped,
GError **error)
{
if (gzipped)
{
gboolean ret_val = FALSE;
GFile *file = g_file_new_for_path (filename);
GFileInputStream *fis = g_file_read (file, NULL, error);
if (!fis)
goto cannot_open;
// Just read it all, as it is, into memory
GByteArray *ba = g_byte_array_new ();
GZlibDecompressor *zd
= g_zlib_decompressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP);
GInputStream *cis = g_converter_input_stream_new
(G_INPUT_STREAM (fis), G_CONVERTER (zd));
ret_val = stream_read_all (ba, cis, error);
g_object_unref (cis);
g_object_unref (zd);
if (ret_val)
{
sd->dict_length = ba->len;
sd->dict = g_byte_array_free (ba, FALSE);
}
else
g_byte_array_free (ba, TRUE);
g_object_unref (fis);
cannot_open:
g_object_unref (file);
return ret_val;
}
sd->mapped_dict = g_mapped_file_new (filename, FALSE, error);
if (!sd->mapped_dict)
return FALSE;
sd->dict_length = g_mapped_file_get_length (sd->mapped_dict);
sd->dict = g_mapped_file_get_contents (sd->mapped_dict);
return TRUE;
}
/** Load a StarDict dictionary.
* @param[in] sdi Parsed .ifo data.
*/
StardictDict *
stardict_dict_new_from_info (StardictInfo *sdi, GError **error)
{
g_return_val_if_fail (sdi != NULL, NULL);
StardictDict *sd = g_object_new (STARDICT_TYPE_DICT, NULL);
sd->info = sdi;
sd->index = g_array_new (FALSE, FALSE, sizeof (StardictIndexEntry));
g_array_set_clear_func (sd->index, index_destroy_cb);
sd->synonyms = g_array_new (FALSE, FALSE, sizeof (StardictSynonymEntry));
g_array_set_clear_func (sd->synonyms, syn_destroy_cb);
const gchar *dot = strrchr (sdi->path, '.');
gchar *base = dot ? g_strndup (sdi->path, dot - sdi->path)
: g_strdup (sdi->path);
gchar *base_idx = g_strconcat (base, ".idx", NULL);
gboolean ret = FALSE;
if (g_file_test (base_idx, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
ret = load_idx (sd, base_idx, FALSE, error);
else
{
gchar *base_idx_gz = g_strconcat (base_idx, ".gz", NULL);
g_free (base_idx);
base_idx = base_idx_gz;
if (g_file_test (base_idx, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
ret = load_idx (sd, base_idx, TRUE, error);
else
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_FILE_NOT_FOUND,
"%s: cannot find index file", sdi->path);
}
}
g_free (base_idx);
if (!ret)
goto error;
gchar *base_dict = g_strconcat (base, ".dict", NULL);
ret = FALSE;
if (g_file_test (base_dict, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
ret = load_dict (sd, base_dict, FALSE, error);
else
{
gchar *base_dict_dz = g_strconcat (base_dict, ".dz", NULL);
g_free (base_dict);
base_dict = base_dict_dz;
if (g_file_test (base_dict, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
ret = load_dict (sd, base_dict, TRUE, error);
else
{
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_FILE_NOT_FOUND,
"%s: cannot find dict file", sdi->path);
}
}
g_free (base_dict);
if (!ret)
goto error;
gchar *base_syn = g_strconcat (base, ".syn", NULL);
if (g_file_test (base_syn, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR))
load_syn (sd, base_syn, NULL);
g_free (base_syn);
g_free (base);
return sd;
error:
g_array_free (sd->index, TRUE);
g_free (base);
g_object_unref (sd);
return NULL;
}
/** Return words for which the argument is a synonym of or NULL
* if there are no such words.
*/
gchar **
stardict_dict_get_synonyms (StardictDict *sd, const gchar *word)
{
BINARY_SEARCH_BEGIN (sd->synonyms->len - 1, stardict_strcmp (word,
g_array_index (sd->synonyms, StardictSynonymEntry, imid).word))
// Back off to the first matching entry
while (imid > 0 && !stardict_strcmp (word,
g_array_index (sd->synonyms, StardictSynonymEntry, --imid).word));
GPtrArray *array = g_ptr_array_new ();
// And add all matching entries from that position on to the array
do
g_ptr_array_add (array, g_strdup (g_array_index
(sd->index, StardictIndexEntry, g_array_index
(sd->synonyms, StardictSynonymEntry, ++imid).original_word).name));
while ((guint) imid < sd->synonyms->len - 1 && !stardict_strcmp (word,
g_array_index (sd->synonyms, StardictSynonymEntry, imid + 1).word));
return (gchar **) g_ptr_array_free (array, FALSE);
BINARY_SEARCH_END
return NULL;
}
/** Search for a word.
* @param[in] word The word in utf-8 encoding
* @param[out] success TRUE if found
* @return An iterator object pointing to the word, or where it would be
*/
StardictIterator *
stardict_dict_search (StardictDict *sd, const gchar *word, gboolean *success)
{
BINARY_SEARCH_BEGIN (sd->index->len - 1, stardict_strcmp (word,
g_array_index (sd->index, StardictIndexEntry, imid).name))
if (success) *success = TRUE;
return stardict_iterator_new (sd, imid);
BINARY_SEARCH_END
if (success) *success = FALSE;
return stardict_iterator_new (sd, imin);
}
static void
stardict_entry_field_free (StardictEntryField *sef)
{
g_free (sef->data);
g_slice_free1 (sizeof *sef, sef);
}
static StardictEntryField *
read_entry (gchar type, const gchar **entry_iterator,
const gchar *end, gboolean is_final)
{
const gchar *entry = *entry_iterator;
if (g_ascii_islower (type))
{
GString *data = g_string_new (NULL);
if (is_final)
{
g_string_append_len (data, entry, end - entry);
entry += end - entry;
}
else
{
gint c = EOF;
while (entry < end && (c = *entry++))
g_string_append_c (data, c);
if (c != '\0')
return (gpointer) g_string_free (data, TRUE);
}
StardictEntryField *sef = g_slice_alloc (sizeof *sef);
sef->type = type;
sef->data_size = data->len + 1;
sef->data = g_string_free (data, FALSE);
*entry_iterator = entry;
return sef;
}
gsize length;
if (is_final)
length = end - entry;
else
{
if (entry + sizeof (guint32) > end)
return NULL;
length = GUINT32_FROM_BE (*(guint32 *) entry);
entry += sizeof (guint32);
if (entry + length > end)
return NULL;
}
StardictEntryField *sef = g_slice_alloc (sizeof *sef);
sef->type = type;
sef->data_size = length;
sef->data = memcpy (g_malloc (length), entry, length);
*entry_iterator = entry + length;
return sef;
}
static GList *
read_entries (const gchar *entry, gsize entry_size, GError **error)
{
const gchar *end = entry + entry_size;
GList *result = NULL;
while (entry < end)
{
gchar type = *entry++;
StardictEntryField *sef = read_entry (type, &entry, end, FALSE);
if (!sef)
goto error;
result = g_list_append (result, sef);
}
return result;
error:
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"invalid data entry");
g_list_free_full (result, (GDestroyNotify) stardict_entry_field_free);
return NULL;
}
static GList *
read_entries_sts (const gchar *entry, gsize entry_size,
const gchar *sts, GError **error)
{
const gchar *end = entry + entry_size;
GList *result = NULL;
while (*sts)
{
gchar type = *sts++;
StardictEntryField *sef = read_entry (type, &entry, end, !*sts);
if (!sef)
goto error;
result = g_list_append (result, sef);
}
return result;
error:
g_set_error (error, STARDICT_ERROR, STARDICT_ERROR_INVALID_DATA,
"invalid data entry");
g_list_free_full (result, (GDestroyNotify) stardict_entry_field_free);
return NULL;
}
/** Return the data for the specified offset in the index. Unsafe. */
static StardictEntry *
stardict_dict_get_entry (StardictDict *sd, guint32 offset)
{
// TODO cache the entries
StardictIndexEntry *sie = &g_array_index (sd->index,
StardictIndexEntry, offset);
g_return_val_if_fail (sie->data_offset + sie->data_size
<= sd->dict_length, NULL);
GList *entries;
if (sd->info->same_type_sequence)
entries = read_entries_sts (sd->dict + sie->data_offset,
sie->data_size, sd->info->same_type_sequence, NULL);
else
entries = read_entries (sd->dict + sie->data_offset,
sie->data_size, NULL);
if (!entries)
return NULL;
StardictEntry *se = g_object_new (STARDICT_TYPE_ENTRY, NULL);
se->fields = entries;
return se;
}
// --- StardictEntry -----------------------------------------------------------
G_DEFINE_TYPE (StardictEntry, stardict_entry, G_TYPE_OBJECT)
static void
stardict_entry_finalize (GObject *self)
{
StardictEntry *sde = STARDICT_ENTRY (self);
g_list_free_full (sde->fields, (GDestroyNotify) stardict_entry_field_free);
G_OBJECT_CLASS (stardict_entry_parent_class)->finalize (self);
}
static void
stardict_entry_class_init (StardictEntryClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = stardict_entry_finalize;
}
static void
stardict_entry_init (G_GNUC_UNUSED StardictEntry *sde)
{
}
/** Return the entries present within the entry.
* @return GList<StardictEntryField *>
*/
const GList *
stardict_entry_get_fields (StardictEntry *sde)
{
g_return_val_if_fail (STARDICT_IS_ENTRY (sde), NULL);
return sde->fields;
}
// --- StardictIterator---------------------------------------------------------
G_DEFINE_TYPE (StardictIterator, stardict_iterator, G_TYPE_OBJECT)
static void
stardict_iterator_finalize (GObject *self)
{
StardictIterator *si = STARDICT_ITERATOR (self);
g_object_unref (si->owner);
G_OBJECT_CLASS (stardict_iterator_parent_class)->finalize (self);
}
static void
stardict_iterator_class_init (StardictIteratorClass *klass)
{
G_OBJECT_CLASS (klass)->finalize = stardict_iterator_finalize;
}
static void
stardict_iterator_init (G_GNUC_UNUSED StardictIterator *sd)
{
}
/** Create a new iterator for the dictionary with offset @a offset. */
StardictIterator *
stardict_iterator_new (StardictDict *sd, guint32 offset)
{
g_return_val_if_fail (STARDICT_IS_DICT (sd), NULL);
StardictIterator *si = g_object_new (STARDICT_TYPE_ITERATOR, NULL);
si->owner = g_object_ref (sd);
si->offset = offset;
return si;
}
/** Return the word in the index that the iterator points at, or NULL. */
const gchar *
stardict_iterator_get_word (StardictIterator *sdi)
{
g_return_val_if_fail (STARDICT_IS_ITERATOR (sdi), NULL);
if (!stardict_iterator_is_valid (sdi))
return NULL;
return g_array_index (sdi->owner->index,
StardictIndexEntry, sdi->offset).name;
}
/** Return the dictionary entry that the iterator points at, or NULL. */
StardictEntry *
stardict_iterator_get_entry (StardictIterator *sdi)
{
g_return_val_if_fail (STARDICT_IS_ITERATOR (sdi), NULL);
if (!stardict_iterator_is_valid (sdi))
return FALSE;
return stardict_dict_get_entry (sdi->owner, sdi->offset);
}
/** Return whether the iterator points to a valid index entry. */
gboolean
stardict_iterator_is_valid (StardictIterator *sdi)
{
g_return_val_if_fail (STARDICT_IS_ITERATOR (sdi), FALSE);
return sdi->offset >= 0 && sdi->offset < sdi->owner->index->len;
}
/** Return the offset of the iterator within the dictionary index. */
gint64
stardict_iterator_get_offset (StardictIterator *sdi)
{
g_return_val_if_fail (STARDICT_IS_ITERATOR (sdi), -1);
return sdi->offset;
}
/** Set the offset of the iterator. */
void
stardict_iterator_set_offset
(StardictIterator *sdi, gint64 offset, gboolean relative)
{
g_return_if_fail (STARDICT_IS_ITERATOR (sdi));
sdi->offset = relative ? sdi->offset + offset : offset;
}
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