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/*
* generator.c: dictionary generator
*
* Copyright (c) 2013 - 2020, Přemysl Eric Janouch <p@janouch.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
*
* 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 <glib.h>
#include <gio/gio.h>
#include "stardict.h"
#include "stardict-private.h"
#include "generator.h"
/// Creates an output stream for a path plus suffix.
static GFileOutputStream *
replace_file_by_suffix (const gchar *base, const gchar *suffix, GError **error)
{
gchar *full_path = g_strconcat (base, suffix, NULL);
GFile *file = g_file_new_for_path (full_path);
g_free (full_path);
GFileOutputStream *stream = g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE, NULL, error);
g_object_unref (file);
return stream;
}
/// Creates a Stardict dictionary generator for the specified basename.
Generator *
generator_new (const gchar *base, GError **error)
{
Generator *self = g_malloc0 (sizeof *self);
self->info = g_malloc0 (sizeof *self->info);
self->info->path = g_strconcat (base, ".ifo", NULL);
self->dict_stream = replace_file_by_suffix (base, ".dict", error);
if (!self->dict_stream)
goto error_dict;
self->idx_stream = replace_file_by_suffix (base, ".idx", error);
if (!self->idx_stream)
goto error_idx;
self->dict_data = g_data_output_stream_new
(G_OUTPUT_STREAM (self->dict_stream));
g_data_output_stream_set_byte_order
(self->dict_data, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
self->idx_data = g_data_output_stream_new
(G_OUTPUT_STREAM (self->idx_stream));
g_data_output_stream_set_byte_order
(self->idx_data, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
return self;
error_idx:
g_object_unref (self->dict_stream);
error_dict:
stardict_info_free (self->info);
g_free (self);
return NULL;
}
/// Finishes the dictionary and writes the .ifo file.
gboolean
generator_finish (Generator *self, GError **error)
{
GString *ifo_contents = g_string_new ("StarDict's dict ifo file\n");
if (self->info->version == SD_VERSION_3_0_0)
g_string_append (ifo_contents, "version=3.0.0\n");
else
g_string_append (ifo_contents, "version=2.4.2\n");
self->info->idx_filesize = g_seekable_tell (G_SEEKABLE (self->idx_stream));
self->info->idx_offset_bits = 32;
if (!g_output_stream_close
(G_OUTPUT_STREAM (self->dict_stream), NULL, error)
|| !g_output_stream_close
(G_OUTPUT_STREAM (self->idx_stream), NULL, error))
return FALSE;
guint i;
for (i = 0; i < _stardict_ifo_keys_length; i++)
{
const struct stardict_ifo_key *key = &_stardict_ifo_keys[i];
if (key->type == IFO_STRING)
{
const gchar *value = G_STRUCT_MEMBER (const gchar *,
self->info, key->offset);
if (value)
g_string_append_printf (ifo_contents, "%s=%s\n",
key->name, value);
}
else
{
if (self->info->version == SD_VERSION_2_4_2
&& !strcmp (key->name, "idxoffsetbits"))
continue;
gulong value = G_STRUCT_MEMBER (gulong,
self->info, key->offset);
if (value)
g_string_append_printf (ifo_contents, "%s=%lu\n",
key->name, value);
}
}
gboolean success = g_file_set_contents (self->info->path,
ifo_contents->str, -1, error);
g_string_free (ifo_contents, TRUE);
return success;
}
/// Start writing a dictionary entry.
void
generator_begin_entry (Generator *self)
{
self->entry_mark = g_seekable_tell (G_SEEKABLE (self->dict_stream));
}
/// Write the data type of an entry field, when there's no sametypesequence.
gboolean
generator_write_type (Generator *self, gchar type, GError **error)
{
return g_data_output_stream_put_byte (self->dict_data, type, NULL, error);
}
/// Write a raw binary field.
gboolean
generator_write_raw (Generator *self,
gpointer data, gsize data_size, gboolean mark_end, GError **error)
{
gsize written;
if ((mark_end && !g_data_output_stream_put_uint32
(self->dict_data, data_size, NULL, error))
|| !g_output_stream_write_all (G_OUTPUT_STREAM (self->dict_stream),
data, data_size, &written, NULL, error))
return FALSE;
return TRUE;
}
/// Write a text string.
gboolean
generator_write_string (Generator *self,
const gchar *s, gboolean mark_end, GError **error)
{
if (!g_data_output_stream_put_string (self->dict_data, s, NULL, error)
|| (mark_end && !g_data_output_stream_put_byte
(self->dict_data, '\0', NULL, error)))
return FALSE;
return TRUE;
}
/// Write a list of data fields back to a dictionary. The list has to be
/// acceptable for the generated dictionary's sametypesequence (or lack of).
gboolean
generator_write_fields (Generator *self, const GList *fields, GError **error)
{
gboolean sts = self->info->same_type_sequence != NULL;
while (fields)
{
StardictEntryField *field = fields->data;
if (!sts && !generator_write_type (self, field->type, error))
return FALSE;
gboolean mark_end = !sts || fields->next != NULL;
if (g_ascii_islower (field->type))
{
if (!generator_write_string (self,
field->data, mark_end, error))
return FALSE;
}
else if (!generator_write_raw (self,
field->data, field->data_size, mark_end, error))
return FALSE;
fields = fields->next;
}
return TRUE;
}
/// Finishes the current entry and writes it into the index.
gboolean
generator_finish_entry (Generator *self, const gchar *word, GError **error)
{
if (!g_data_output_stream_put_string (self->idx_data, word, NULL, error)
|| !g_data_output_stream_put_byte (self->idx_data, '\0', NULL, error)
|| !g_data_output_stream_put_uint32 (self->idx_data,
self->entry_mark, NULL, error)
|| !g_data_output_stream_put_uint32 (self->idx_data,
g_seekable_tell (G_SEEKABLE (self->dict_stream)) -
self->entry_mark, NULL, error))
return FALSE;
self->info->word_count++;
return TRUE;
}
/// Destroys the generator object, freeing up system resources.
void
generator_free (Generator *self)
{
stardict_info_free (self->info);
g_object_unref (self->dict_data);
g_object_unref (self->idx_data);
g_object_unref (self->dict_stream);
g_object_unref (self->idx_stream);
}
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