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%{ 
/* This file is part of Idest. 
   Copyright (C) 2009-2011, 2015 Sergey Poznyakoff
 
   Idest 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 3, or (at your option)
   any later version.
 
   Idest 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.
 
   You should have received a copy of the GNU General Public License
   along with Idest.  If not, see <http://www.gnu.org/licenses/>. */

#include "idest.h"
#include "field.h"

#define QID(name) _qual_##name
#define DQ(name) static char *QID(name)[]

DQ(COMM) = { "lang", "condesc" };
DQ(TXXX) = { "condesc" };
DQ(WXXX) = { "condesc" };
DQ(APIC) = { "mime-type", "pic-type", "condesc" };

#define QUAL(name) sizeof(QID(name))/sizeof(QID(name)[0]), QID(name)
#define QUALTEXT 0, NULL

static int
decode_qv(struct ed_item *item, struct id3_frame const *frame,
	  int n, int count)
{
	union id3_field *field;
	int i;

	item->qc = count;
	item->qv = xcalloc(item->qc, sizeof(item->qv[0]));
	for (i = 0; i < count; i++) {
		field = id3_frame_field(frame, n + i);
		if (!field)
			break;
		item->qv[i] = field_to_string(field, 0);
	}
	return 0;
}

char *_idest_errstr[] = {
	"no error",
	"no such field",
	"bad conversion",
	"set error",
	"operation not supported",
	"unknown type",
	"field number out of range"
};
int _idest_nerrs = sizeof(_idest_errstr)/sizeof(_idest_errstr[0]);

const char *
idest_strerror(int code)
{
	if (code < 0 || code > _idest_nerrs)
		return "unknown error";
	return _idest_errstr[code];
}

int
frame_field_from_string(struct id3_frame *frame, int n, const char *value)
{
	int rc = 0, res = 0;
	enum id3_field_type type;
	union id3_field *field;
	id3_ucs4_t *ucs4;
	struct id3_frametype const *frametype =
		id3_frametype_lookup(frame->id, 4);

	if (!frametype)
		return IDEST_ERR_BADTYPE;
	if (n > frametype->nfields - 1)
                 /* last field is supposed to be a value */
		return IDEST_ERR_BADFIELD;
	type = frametype->fields[n];
	
	field = id3_frame_field(frame, n);
	if (!field)
		return IDEST_ERR_NOFIELD;
	if (type == ID3_FIELD_TYPE_TEXTENCODING) {
		/* Special case */
		if (id3_field_settextencoding(field,
					      latin1_option ?
					      ID3_FIELD_TEXTENCODING_ISO_8859_1 
					      : ID3_FIELD_TEXTENCODING_UTF_8))
			rc = IDEST_ERR_SET;
		return rc;
	}

	if (!value) {
		id3_field_init(field, type);
		return 0;
	}

	switch (type) {
	case ID3_FIELD_TYPE_INT8:
	case ID3_FIELD_TYPE_INT16:
	case ID3_FIELD_TYPE_INT24:
	case ID3_FIELD_TYPE_INT32: {
		char *p;
		signed long number = strtoul(value, &p, 10);
		if (*p)
			rc = IDEST_ERR_BADCONV;
		else
			res = id3_field_setint(field, number);
		break;
	}

	case ID3_FIELD_TYPE_LATIN1:
	case ID3_FIELD_TYPE_LATIN1FULL:
		/* FIXME: Recode */
		res = id3_field_setlatin1(field, (id3_latin1_t const *)value);
		break;

	case ID3_FIELD_TYPE_LATIN1LIST:
		/* FIXME */
		rc = IDEST_ERR_NOTSUPP;
		break;

	case ID3_FIELD_TYPE_STRING:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setstring(field, ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_STRINGFULL:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setfullstring(field, ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_STRINGLIST:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setstrings(field, 1, &ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_LANGUAGE:
		res = id3_field_setlanguage(field, value);
		break;
		
	case ID3_FIELD_TYPE_FRAMEID:
		res = id3_field_setframeid(field, value);
		break;
		
	case ID3_FIELD_TYPE_DATE:
		/* FIXME: Convert and copy 8 bytes into
		   field->immediate.value */
		rc = IDEST_ERR_NOTSUPP;
		break;
		
	case ID3_FIELD_TYPE_INT32PLUS:
	case ID3_FIELD_TYPE_BINARYDATA:
		rc = field_binary_from_string(field, value);
		break;

	default:
		rc = IDEST_ERR_BADTYPE;
	}
	if (rc == 0 && res)
		rc = IDEST_ERR_SET;
	return rc;
}

int
frame_field_from_rawdata(struct id3_frame *frame, int n,
			 enum id3_field_type type,
			 const char *value)
{
	int rc = 0, res = 0;
	union id3_field *field;
	id3_ucs4_t *ucs4;

	field = id3_frame_field(frame, n);
	if (!field)
		return IDEST_ERR_NOFIELD;
	if (type == ID3_FIELD_TYPE_TEXTENCODING) {
		/* Special case */
		if (id3_field_settextencoding(field,
					      latin1_option ?
					      ID3_FIELD_TEXTENCODING_ISO_8859_1 
					      : ID3_FIELD_TEXTENCODING_UTF_8))
			rc = IDEST_ERR_SET;
		return rc;
	}

	switch (type) {
	case ID3_FIELD_TYPE_INT8:
	case ID3_FIELD_TYPE_INT16:
	case ID3_FIELD_TYPE_INT24:
	case ID3_FIELD_TYPE_INT32: {
		char *p;
		signed long number = strtoul(value, &p, 10);
		if (*p)
			rc = IDEST_ERR_BADCONV;
		else
			res = id3_field_setint(field, number);
		break;
	}

	case ID3_FIELD_TYPE_LATIN1:
	case ID3_FIELD_TYPE_LATIN1FULL:
		/* FIXME: Recode */
		res = id3_field_setlatin1(field, (id3_latin1_t const *)value);
		break;

	case ID3_FIELD_TYPE_LATIN1LIST:
		/* FIXME */
		rc = IDEST_ERR_NOTSUPP;
		break;

	case ID3_FIELD_TYPE_STRING:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setstring(field, ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_STRINGFULL:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setfullstring(field, ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_STRINGLIST:
		if (latin1_option)
			ucs4 = id3_latin1_ucs4duplicate(
				     (const id3_latin1_t *)value);
		else
			ucs4 = id3_utf8_ucs4duplicate(
				     (const id3_utf8_t *)value);
		res = id3_field_setstrings(field, 1, &ucs4);
		free(ucs4);
		break;

	case ID3_FIELD_TYPE_LANGUAGE:
		res = id3_field_setlanguage(field, value);
		break;
		
	case ID3_FIELD_TYPE_FRAMEID:
		res = id3_field_setframeid(field, value);
		break;
		
	case ID3_FIELD_TYPE_DATE:
		/* FIXME: Convert and copy 8 bytes into
		   field->immediate.value */
		rc = IDEST_ERR_NOTSUPP;
		break;
		
	case ID3_FIELD_TYPE_INT32PLUS:
	case ID3_FIELD_TYPE_BINARYDATA:
		rc = field_binary_from_string(field, value);
		break;

	default:
		rc = IDEST_ERR_BADTYPE;
	}
	if (rc == 0 && res)
		rc = IDEST_ERR_SET;
	return rc;
}

static int
encode_qv(struct id3_frame *frame, int frameoff, const struct ed_item *item)	
{
	int i;
	
	for (i = 0; i < item->qc; i++) {
		int rc = frame_field_from_string(frame, i + frameoff,
						 item->qv[i]);
		if (rc)
			return rc;
	}
	return 0;
}


static int
comm_cmp(struct id3_frame const *frame, const struct ed_item const *item)
{
	int rc;
	struct ed_item itm;
	
	memset(&itm, 0, sizeof(itm));
	if (decode_qv(&itm, frame, 1, 2))
		return 1;
	
	rc = ed_item_qv_cmp(&itm, item);
	ed_item_free_content(&itm);
	return rc;
}

static int
comm_encode(struct id3_frame *frame, const struct ed_item *item)
{
	int rc;
	union id3_field *field;
	id3_ucs4_t *ucs4;

        /* Set encoding */
	rc = frame_field_from_string(frame, 0, NULL);
	if (rc)
		return rc;
	/* Set rest of subfields */
	rc = encode_qv(frame, 1, item);
	if (rc)
		return rc;
	
	field = id3_frame_field(frame, 3);
	if (latin1_option)
		ucs4 = id3_latin1_ucs4duplicate(
			(const id3_latin1_t *) item->value);
	else
		ucs4 = id3_utf8_ucs4duplicate(
			(const id3_utf8_t *) item->value);
	if (id3_field_setfullstring(field, ucs4))
		rc = IDEST_ERR_SET;
	free(ucs4);
	return rc;
}

static int
comm_decode(struct ed_item *item, struct id3_frame const *frame)
{
	int rc;
	union id3_field *field;
	
	if (rc = decode_qv(item, frame, 1, 2))
		return rc;
	field = id3_frame_field(frame, 3);
	if (!field)
		return IDEST_ERR_NOFIELD;
	/* FIXME: Recode as necessary */
	item->value = field_to_string(field, 0);
	
	return 0;
}

static int
text_encode(struct id3_frame *frame, struct ed_item const *item)
{
	const char *value = item->value;
	union id3_field *field;
	enum id3_field_textencoding encoding =
		(latin1_option ? ID3_FIELD_TEXTENCODING_ISO_8859_1 
		               : ID3_FIELD_TEXTENCODING_UTF_8);
	id3_ucs4_t *ucs4;
	
	field = id3_frame_field(frame, 0);
	id3_field_settextencoding(field, encoding);

	if (latin1_option)
		ucs4 = id3_latin1_ucs4duplicate((const id3_latin1_t *) value);
	else
		ucs4 = id3_utf8_ucs4duplicate((const id3_utf8_t *)value);
	
	
	field = id3_frame_field(frame, 1);
	id3_field_setstrings(field, 1, &ucs4);
	free(ucs4);
	return 0;
}

static int
text_decode(struct ed_item *item, struct id3_frame const *frame)
{
	int isgenre = strcmp(frame->id, ID3_FRAME_GENRE) == 0;
	enum id3_field_textencoding encoding;
	union id3_field *field;

	field = id3_frame_field(frame, 0);
	if (!field)
		return IDEST_ERR_NOFIELD;
	encoding = id3_field_gettextencoding(field);
	if (encoding == -1)
		return IDEST_ERR_BADCONV;
	field = id3_frame_field(frame, 1);
	if (!field)
		return IDEST_ERR_NOFIELD;
        /* FIXME: Recode as necessary */
	item->value = field_to_string(field, isgenre);
	return 0;
}

static int
txxx_cmp(struct id3_frame const *frame, const struct ed_item const *item)
{
	int rc;
	struct ed_item itm;
	
	memset(&itm, 0, sizeof(itm));
	if (decode_qv(&itm, frame, 1, 1))
		return 1;
	
	rc = ed_item_qv_cmp(&itm, item);
	ed_item_free_content(&itm);
	return rc;
}

static int
txxx_encode(struct id3_frame *frame, const struct ed_item *item)
{
	int rc;
	union id3_field *field;
	id3_ucs4_t *ucs4;

        /* Set encoding */
	rc = frame_field_from_string(frame, 0, NULL);
	if (rc)
		return rc;
	/* Set rest of subfields */
	rc = encode_qv(frame, 1, item);
	if (rc)
		return rc;
	
	field = id3_frame_field(frame, 2);
	if (latin1_option)
		ucs4 = id3_latin1_ucs4duplicate(
			(const id3_latin1_t *) item->value);
	else
		ucs4 = id3_utf8_ucs4duplicate(
			(const id3_utf8_t *) item->value);
	if (id3_field_setstring(field, ucs4))
		rc = IDEST_ERR_SET;
	free(ucs4);
	return rc;
}

static int
txxx_decode(struct ed_item *item, struct id3_frame const *frame)
{
	int rc;
	union id3_field *field;
	
	if (rc = decode_qv(item, frame, 1, 1))
		return rc;
	field = id3_frame_field(frame, 2);
	if (!field)
		return IDEST_ERR_NOFIELD;
	/* FIXME: Recode as necessary */
	item->value = field_to_string(field, 0);
	
	return 0;
}

/* FIXME: Comparator is defined, but there is still no way to
   address multiple URL frames in the tag, as they lack qualifiers.
*/
static int
url_cmp(struct id3_frame const *frame, const struct ed_item const *item)
{
	int rc;
	union id3_field *field;
	char *value;

	field = id3_frame_field(frame, 0);
	if (!field)
		return 1;
	value = field_to_string(field, 0);
	rc = strcmp(value, item->value);
	free(value);
	return rc;
}

static int
url_encode(struct id3_frame *frame, const struct ed_item *item)
{
	return frame_field_from_string(frame, 0, item->value);
}

static int
url_decode(struct ed_item *item, struct id3_frame const *frame)
{
	union id3_field *field;

	field = id3_frame_field(frame, 0);
	if (!field)
		return IDEST_ERR_NOFIELD;
	/* FIXME: Recode as necessary */
	item->value = field_to_string(field, 0);
	
	return 0;
}

static int
wxxx_cmp(struct id3_frame const *frame, const struct ed_item const *item)
{
	int rc;
	struct ed_item itm;
	
	memset(&itm, 0, sizeof(itm));
	if (decode_qv(&itm, frame, 1, 1))
		return 1;
	
	rc = ed_item_qv_cmp(&itm, item);
	ed_item_free_content(&itm);
	return rc;
}

static int
wxxx_encode(struct id3_frame *frame, const struct ed_item *item)
{
	int rc;

	/* Set encoding */
	rc = frame_field_from_string(frame, 0, NULL);
	if (rc)
		return rc;

	/* Set subfields */
	rc = encode_qv(frame, 1, item);
	if (rc)
		return rc;
	return frame_field_from_string(frame, 2, item->value);
}

static int
wxxx_decode(struct ed_item *item, struct id3_frame const *frame)
{
	int rc;
	union id3_field *field;
	
	if (rc = decode_qv(item, frame, 1, 1))
		return rc;
	
	field = id3_frame_field(frame, 2);
	if (!field)
		return IDEST_ERR_NOFIELD;
	/* FIXME: Recode as necessary */
	item->value = field_to_string(field, 0);
	
	return 0;
}

static int
apic_cmp(struct id3_frame const *frame, const struct ed_item const *item)
{
	int rc;
	struct ed_item itm;
	
	memset(&itm, 0, sizeof(itm));
	if (decode_qv(&itm, frame, 1, 3))
		return 1;
	
	rc = ed_item_qv_cmp(&itm, item);
	ed_item_free_content(&itm);
	return rc;
}

static int
apic_encode(struct id3_frame *frame, const struct ed_item *item)
{
	int rc;

	/* Set encoding */
	rc = frame_field_from_string(frame, 0, NULL);
	if (rc)
		return rc;

	/* Set subfields */
	rc = encode_qv(frame, 1, item);
	if (rc)
		return rc;
	return frame_field_from_string(frame, 4, item->value);
}

static int
apic_decode(struct ed_item *item, struct id3_frame const *frame)
{
	int rc;
	union id3_field *field;
	
	if (rc = decode_qv(item, frame, 1, 3))
		return rc;
	
	field = id3_frame_field(frame, 4);
	if (!field)
		return IDEST_ERR_NOFIELD;
	item->value = field_to_string(field, 0);
	
	return 0;
}

%}
%define lookup-function-name idest_frame_lookup_len
%global-table
struct idest_frametab;
%%
APIC,   QUAL(APIC),     apic_cmp, apic_encode, apic_decode
COMM,	QUAL(COMM),	comm_cmp, comm_encode, comm_decode
TALB,   QUALTEXT,       NULL, text_encode, text_decode
TBPM, 	QUALTEXT,       NULL, text_encode, text_decode
TCOM, 	QUALTEXT,       NULL, text_encode, text_decode 
TCON, 	QUALTEXT,       NULL, text_encode, text_decode
TCOP, 	QUALTEXT,       NULL, text_encode, text_decode 
TDEN, 	QUALTEXT,       NULL, text_encode, text_decode 
TDLY, 	QUALTEXT,       NULL, text_encode, text_decode 
TDOR, 	QUALTEXT,       NULL, text_encode, text_decode 
TDRC, 	QUALTEXT,       NULL, text_encode, text_decode  
TDRL, 	QUALTEXT,       NULL, text_encode, text_decode  
TDTG, 	QUALTEXT,       NULL, text_encode, text_decode  
TENC, 	QUALTEXT,       NULL, text_encode, text_decode  
TEXT, 	QUALTEXT,       NULL, text_encode, text_decode  
TFLT, 	QUALTEXT,       NULL, text_encode, text_decode  
TIPL, 	QUALTEXT,       NULL, text_encode, text_decode  
TIT1, 	QUALTEXT,       NULL, text_encode, text_decode  
TIT2, 	QUALTEXT,       NULL, text_encode, text_decode 
TIT3, 	QUALTEXT,       NULL, text_encode, text_decode 
TKEY, 	QUALTEXT,       NULL, text_encode, text_decode 
TLAN, 	QUALTEXT,       NULL, text_encode, text_decode 
TLEN, 	QUALTEXT,       NULL, text_encode, text_decode 
TMCL, 	QUALTEXT,       NULL, text_encode, text_decode 
TMED, 	QUALTEXT,       NULL, text_encode, text_decode 
TMOO, 	QUALTEXT,       NULL, text_encode, text_decode 
TOAL, 	QUALTEXT,       NULL, text_encode, text_decode 
TOFN, 	QUALTEXT,       NULL, text_encode, text_decode 
TOLY, 	QUALTEXT,       NULL, text_encode, text_decode 
TOPE, 	QUALTEXT,       NULL, text_encode, text_decode 
TOWN, 	QUALTEXT,       NULL, text_encode, text_decode 
TPE1, 	QUALTEXT,       NULL, text_encode, text_decode 
TPE2, 	QUALTEXT,       NULL, text_encode, text_decode 
TPE3, 	QUALTEXT,       NULL, text_encode, text_decode 
TPE4, 	QUALTEXT,       NULL, text_encode, text_decode 
TPOS, 	QUALTEXT,       NULL, text_encode, text_decode 
TPRO, 	QUALTEXT,       NULL, text_encode, text_decode 
TPUB, 	QUALTEXT,       NULL, text_encode, text_decode 
TRCK, 	QUALTEXT,       NULL, text_encode, text_decode 
TRSN, 	QUALTEXT,       NULL, text_encode, text_decode 
TRSO, 	QUALTEXT,       NULL, text_encode, text_decode 
TSOA, 	QUALTEXT,       NULL, text_encode, text_decode 
TSOP, 	QUALTEXT,       NULL, text_encode, text_decode 
TSOT, 	QUALTEXT,       NULL, text_encode, text_decode 
TSRC, 	QUALTEXT,       NULL, text_encode, text_decode 
TSSE, 	QUALTEXT,       NULL, text_encode, text_decode 
TSST, 	QUALTEXT,       NULL, text_encode, text_decode
TXXX,	QUAL(TXXX),     txxx_cmp, txxx_encode, txxx_decode
USLT,   QUAL(COMM),     comm_cmp, comm_encode, comm_decode
WCOM,   0,  NULL,       url_cmp, url_encode, url_decode
WCOP,   0,  NULL,       NULL, url_encode, url_decode
WOAF,   0,  NULL,       NULL, url_encode, url_decode
WOAR,   0,  NULL,       url_cmp, url_encode, url_decode
WOAS,   0,  NULL,       NULL, url_encode, url_decode
WORS,   0,  NULL,       NULL, url_encode, url_decode
WPAY,   0,  NULL,       NULL, url_encode, url_decode
WPUB,   0,  NULL,       NULL, url_encode, url_decode
WXXX,   QUAL(WXXX),     wxxx_cmp, wxxx_encode, wxxx_decode	 
%%

static int wordlist_count = sizeof(wordlist)/sizeof(wordlist[0]);	 

const struct idest_frametab *
idest_frame_lookup(const char *str)
{
	return idest_frame_lookup_len(str, strlen(str));
}

static int
frametab_cmp(const void *a, const void *b)
{
	struct idest_frametab const *fta = a;
	struct idest_frametab const *ftb = b;
	return strcmp(fta->id, ftb->id);
}

int
frametab_enumerate(int (*fun)(const struct idest_frametab *, void *),
		   void *data, int sorted)
{
	struct idest_frametab const *ft;
	struct idest_frametab *ftbuf = NULL;
	int i;

	if (sorted) {
		ftbuf = xmalloc(sizeof(wordlist));
		memcpy(ftbuf, wordlist, sizeof(wordlist));
		qsort(ftbuf, wordlist_count, sizeof(ftbuf[0]), frametab_cmp);
		ft = ftbuf;
	} else
		ft = wordlist;
	for (i = 0; i < wordlist_count; i++) {
		int rc = fun(ft + i, data);
		if (rc)
			return rc;
	}
	free(ftbuf);
	return 0;
}


/*
Local variables:
mode: c
end:
*/  

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