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author | Warren Dukes <warren.dukes@gmail.com> | 2004-02-23 23:41:20 +0000 |
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committer | Warren Dukes <warren.dukes@gmail.com> | 2004-02-23 23:41:20 +0000 |
commit | d35747a40c7dea12de95f78a4f283a45ef687597 (patch) | |
tree | 3a85f138e68c7ef3e5a9ece863ed7266ad1cd7ce /src/libid3tag/field.c | |
download | mpd-d35747a40c7dea12de95f78a4f283a45ef687597.tar.gz mpd-d35747a40c7dea12de95f78a4f283a45ef687597.tar.xz mpd-d35747a40c7dea12de95f78a4f283a45ef687597.zip |
import from SF CVS
git-svn-id: https://svn.musicpd.org/mpd/trunk@1 09075e82-0dd4-0310-85a5-a0d7c8717e4f
Diffstat (limited to '')
-rw-r--r-- | src/libid3tag/field.c | 875 |
1 files changed, 875 insertions, 0 deletions
diff --git a/src/libid3tag/field.c b/src/libid3tag/field.c new file mode 100644 index 000000000..a7b413edb --- /dev/null +++ b/src/libid3tag/field.c @@ -0,0 +1,875 @@ +/* + * libid3tag - ID3 tag manipulation library + * Copyright (C) 2000-2003 Underbit Technologies, Inc. + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * $Id: field.c,v 1.1 2003/08/14 03:57:13 shank Exp $ + */ + +# ifdef HAVE_CONFIG_H +# include "config.h" +# endif + +# include "global.h" + +# include <stdlib.h> +# include <string.h> + +# ifdef HAVE_ASSERT_H +# include <assert.h> +# endif + +# include "id3tag.h" +# include "field.h" +# include "frame.h" +# include "render.h" +# include "ucs4.h" +# include "latin1.h" +# include "parse.h" + +/* + * NAME: field->init() + * DESCRIPTION: initialize a field to a default value for the given type + */ +void id3_field_init(union id3_field *field, enum id3_field_type type) +{ + assert(field); + + switch (field->type = type) { + case ID3_FIELD_TYPE_TEXTENCODING: + case ID3_FIELD_TYPE_INT8: + case ID3_FIELD_TYPE_INT16: + case ID3_FIELD_TYPE_INT24: + case ID3_FIELD_TYPE_INT32: + field->number.value = 0; + break; + + case ID3_FIELD_TYPE_LATIN1: + case ID3_FIELD_TYPE_LATIN1FULL: + field->latin1.ptr = 0; + break; + + case ID3_FIELD_TYPE_LATIN1LIST: + field->latin1list.nstrings = 0; + field->latin1list.strings = 0; + + case ID3_FIELD_TYPE_STRING: + case ID3_FIELD_TYPE_STRINGFULL: + field->string.ptr = 0; + break; + + case ID3_FIELD_TYPE_STRINGLIST: + field->stringlist.nstrings = 0; + field->stringlist.strings = 0; + break; + + case ID3_FIELD_TYPE_LANGUAGE: + strcpy(field->immediate.value, "XXX"); + break; + + case ID3_FIELD_TYPE_FRAMEID: + strcpy(field->immediate.value, "XXXX"); + break; + + case ID3_FIELD_TYPE_DATE: + memset(field->immediate.value, 0, sizeof(field->immediate.value)); + break; + + case ID3_FIELD_TYPE_INT32PLUS: + case ID3_FIELD_TYPE_BINARYDATA: + field->binary.data = 0; + field->binary.length = 0; + break; + } +} + +/* + * NAME: field->finish() + * DESCRIPTION: reset a field, deallocating memory if necessary + */ +void id3_field_finish(union id3_field *field) +{ + unsigned int i; + + assert(field); + + switch (field->type) { + case ID3_FIELD_TYPE_TEXTENCODING: + case ID3_FIELD_TYPE_INT8: + case ID3_FIELD_TYPE_INT16: + case ID3_FIELD_TYPE_INT24: + case ID3_FIELD_TYPE_INT32: + case ID3_FIELD_TYPE_LANGUAGE: + case ID3_FIELD_TYPE_FRAMEID: + case ID3_FIELD_TYPE_DATE: + break; + + case ID3_FIELD_TYPE_LATIN1: + case ID3_FIELD_TYPE_LATIN1FULL: + if (field->latin1.ptr) + free(field->latin1.ptr); + break; + + case ID3_FIELD_TYPE_LATIN1LIST: + for (i = 0; i < field->latin1list.nstrings; ++i) + free(field->latin1list.strings[i]); + + if (field->latin1list.strings) + free(field->latin1list.strings); + break; + + case ID3_FIELD_TYPE_STRING: + case ID3_FIELD_TYPE_STRINGFULL: + if (field->string.ptr) + free(field->string.ptr); + break; + + case ID3_FIELD_TYPE_STRINGLIST: + for (i = 0; i < field->stringlist.nstrings; ++i) + free(field->stringlist.strings[i]); + + if (field->stringlist.strings) + free(field->stringlist.strings); + break; + + case ID3_FIELD_TYPE_INT32PLUS: + case ID3_FIELD_TYPE_BINARYDATA: + if (field->binary.data) + free(field->binary.data); + break; + } + + id3_field_init(field, field->type); +} + +/* + * NAME: field->type() + * DESCRIPTION: return the value type of a field + */ +enum id3_field_type id3_field_type(union id3_field const *field) +{ + assert(field); + + return field->type; +} + +/* + * NAME: field->parse() + * DESCRIPTION: parse a field value + */ +int id3_field_parse(union id3_field *field, id3_byte_t const **ptr, + id3_length_t length, enum id3_field_textencoding *encoding) +{ + assert(field); + + id3_field_finish(field); + + switch (field->type) { + case ID3_FIELD_TYPE_INT32: + if (length < 4) + goto fail; + + field->number.value = id3_parse_uint(ptr, 4); + break; + + case ID3_FIELD_TYPE_INT24: + if (length < 3) + goto fail; + + field->number.value = id3_parse_uint(ptr, 3); + break; + + case ID3_FIELD_TYPE_INT16: + if (length < 2) + goto fail; + + field->number.value = id3_parse_uint(ptr, 2); + break; + + case ID3_FIELD_TYPE_INT8: + case ID3_FIELD_TYPE_TEXTENCODING: + if (length < 1) + goto fail; + + field->number.value = id3_parse_uint(ptr, 1); + + if (field->type == ID3_FIELD_TYPE_TEXTENCODING) + *encoding = field->number.value; + break; + + case ID3_FIELD_TYPE_LANGUAGE: + if (length < 3) + goto fail; + + id3_parse_immediate(ptr, 3, field->immediate.value); + break; + + case ID3_FIELD_TYPE_FRAMEID: + if (length < 4) + goto fail; + + id3_parse_immediate(ptr, 4, field->immediate.value); + break; + + case ID3_FIELD_TYPE_DATE: + if (length < 8) + goto fail; + + id3_parse_immediate(ptr, 8, field->immediate.value); + break; + + case ID3_FIELD_TYPE_LATIN1: + case ID3_FIELD_TYPE_LATIN1FULL: + { + id3_latin1_t *latin1; + + latin1 = id3_parse_latin1(ptr, length, + field->type == ID3_FIELD_TYPE_LATIN1FULL); + if (latin1 == 0) + goto fail; + + field->latin1.ptr = latin1; + } + break; + + case ID3_FIELD_TYPE_LATIN1LIST: + { + id3_byte_t const *end; + id3_latin1_t *latin1, **strings; + + end = *ptr + length; + + while (end - *ptr > 0) { + latin1 = id3_parse_latin1(ptr, end - *ptr, 0); + if (latin1 == 0) + goto fail; + + strings = realloc(field->latin1list.strings, + (field->latin1list.nstrings + 1) * sizeof(*strings)); + if (strings == 0) { + free(latin1); + goto fail; + } + + field->latin1list.strings = strings; + field->latin1list.strings[field->latin1list.nstrings++] = latin1; + } + } + break; + + case ID3_FIELD_TYPE_STRING: + case ID3_FIELD_TYPE_STRINGFULL: + { + id3_ucs4_t *ucs4; + + ucs4 = id3_parse_string(ptr, length, *encoding, + field->type == ID3_FIELD_TYPE_STRINGFULL); + if (ucs4 == 0) + goto fail; + + field->string.ptr = ucs4; + } + break; + + case ID3_FIELD_TYPE_STRINGLIST: + { + id3_byte_t const *end; + id3_ucs4_t *ucs4, **strings; + + end = *ptr + length; + + while (end - *ptr > 0) { + ucs4 = id3_parse_string(ptr, end - *ptr, *encoding, 0); + if (ucs4 == 0) + goto fail; + + strings = realloc(field->stringlist.strings, + (field->stringlist.nstrings + 1) * sizeof(*strings)); + if (strings == 0) { + free(ucs4); + goto fail; + } + + field->stringlist.strings = strings; + field->stringlist.strings[field->stringlist.nstrings++] = ucs4; + } + } + break; + + case ID3_FIELD_TYPE_INT32PLUS: + case ID3_FIELD_TYPE_BINARYDATA: + { + id3_byte_t *data; + + data = id3_parse_binary(ptr, length); + if (data == 0) + goto fail; + + field->binary.data = data; + field->binary.length = length; + } + break; + } + + return 0; + + fail: + return -1; +} + +/* + * NAME: field->render() + * DESCRIPTION: render a field value + */ +id3_length_t id3_field_render(union id3_field const *field, id3_byte_t **ptr, + enum id3_field_textencoding *encoding, + int terminate) +{ + id3_length_t size; + unsigned int i; + + assert(field && encoding); + + switch (field->type) { + case ID3_FIELD_TYPE_INT32: + return id3_render_int(ptr, field->number.value, 4); + + case ID3_FIELD_TYPE_INT24: + return id3_render_int(ptr, field->number.value, 3); + + case ID3_FIELD_TYPE_INT16: + return id3_render_int(ptr, field->number.value, 2); + + case ID3_FIELD_TYPE_TEXTENCODING: + *encoding = field->number.value; + case ID3_FIELD_TYPE_INT8: + return id3_render_int(ptr, field->number.value, 1); + + case ID3_FIELD_TYPE_LATIN1: + case ID3_FIELD_TYPE_LATIN1FULL: + return id3_render_latin1(ptr, field->latin1.ptr, terminate); + + case ID3_FIELD_TYPE_LATIN1LIST: + size = 0; + for (i = 0; i < field->latin1list.nstrings; ++i) { + size += id3_render_latin1(ptr, field->latin1list.strings[i], + (i < field->latin1list.nstrings - 1) || + terminate); + } + return size; + + case ID3_FIELD_TYPE_STRING: + case ID3_FIELD_TYPE_STRINGFULL: + return id3_render_string(ptr, field->string.ptr, *encoding, terminate); + + case ID3_FIELD_TYPE_STRINGLIST: + size = 0; + for (i = 0; i < field->stringlist.nstrings; ++i) { + size += id3_render_string(ptr, field->stringlist.strings[i], *encoding, + (i < field->stringlist.nstrings - 1) || + terminate); + } + return size; + + case ID3_FIELD_TYPE_LANGUAGE: + return id3_render_immediate(ptr, field->immediate.value, 3); + + case ID3_FIELD_TYPE_FRAMEID: + return id3_render_immediate(ptr, field->immediate.value, 4); + + case ID3_FIELD_TYPE_DATE: + return id3_render_immediate(ptr, field->immediate.value, 8); + + case ID3_FIELD_TYPE_INT32PLUS: + case ID3_FIELD_TYPE_BINARYDATA: + return id3_render_binary(ptr, field->binary.data, field->binary.length); + } + + return 0; +} + +/* + * NAME: field->setint() + * DESCRIPTION: set the value of an int field + */ +int id3_field_setint(union id3_field *field, signed long number) +{ + assert(field); + + switch (field->type) { + case ID3_FIELD_TYPE_INT8: + if (number > 0x7f || number < -0x80) + return -1; + break; + + case ID3_FIELD_TYPE_INT16: + if (number > 0x7fff || number < -0x8000) + return -1; + break; + + case ID3_FIELD_TYPE_INT24: + if (number > 0x7fffffL || number < -0x800000L) + return -1; + break; + + case ID3_FIELD_TYPE_INT32: + if (number > 0x7fffffffL || number < -0x80000000L) + return -1; + break; + + default: + return -1; + } + + id3_field_finish(field); + + field->number.value = number; + + return 0; +} + +/* + * NAME: field->settextencoding() + * DESCRIPTION: set the value of a textencoding field + */ +int id3_field_settextencoding(union id3_field *field, + enum id3_field_textencoding encoding) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_TEXTENCODING) + return -1; + + id3_field_finish(field); + + field->number.value = encoding; + + return 0; +} + +static +int set_latin1(union id3_field *field, id3_latin1_t const *latin1) +{ + id3_latin1_t *data; + + if (latin1 == 0 || *latin1 == 0) + data = 0; + else { + data = id3_latin1_duplicate(latin1); + if (data == 0) + return -1; + } + + field->latin1.ptr = data; + + return 0; +} + +/* + * NAME: field->setlatin1() + * DESCRIPTION: set the value of a latin1 field + */ +int id3_field_setlatin1(union id3_field *field, id3_latin1_t const *latin1) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_LATIN1) + return -1; + + id3_field_finish(field); + + if (latin1) { + id3_latin1_t const *ptr; + + for (ptr = latin1; *ptr; ++ptr) { + if (*ptr == '\n') + return -1; + } + } + + return set_latin1(field, latin1); +} + +/* + * NAME: field->setfulllatin1() + * DESCRIPTION: set the value of a full latin1 field + */ +int id3_field_setfulllatin1(union id3_field *field, id3_latin1_t const *latin1) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_LATIN1FULL) + return -1; + + id3_field_finish(field); + + return set_latin1(field, latin1); +} + +static +int set_string(union id3_field *field, id3_ucs4_t const *string) +{ + id3_ucs4_t *data; + + if (string == 0 || *string == 0) + data = 0; + else { + data = id3_ucs4_duplicate(string); + if (data == 0) + return -1; + } + + field->string.ptr = data; + + return 0; +} + +/* + * NAME: field->setstring() + * DESCRIPTION: set the value of a string field + */ +int id3_field_setstring(union id3_field *field, id3_ucs4_t const *string) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRING) + return -1; + + id3_field_finish(field); + + if (string) { + id3_ucs4_t const *ptr; + + for (ptr = string; *ptr; ++ptr) { + if (*ptr == '\n') + return -1; + } + } + + return set_string(field, string); +} + +/* + * NAME: field->setfullstring() + * DESCRIPTION: set the value of a full string field + */ +int id3_field_setfullstring(union id3_field *field, id3_ucs4_t const *string) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGFULL) + return -1; + + id3_field_finish(field); + + return set_string(field, string); +} + +/* + * NAME: field->setstrings() + * DESCRIPTION: set the value of a stringlist field + */ +int id3_field_setstrings(union id3_field *field, + unsigned int length, id3_ucs4_t **ptrs) +{ + id3_ucs4_t **strings; + unsigned int i; + + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGLIST) + return -1; + + id3_field_finish(field); + + if (length == 0) + return 0; + + strings = malloc(length * sizeof(*strings)); + if (strings == 0) + return -1; + + for (i = 0; i < length; ++i) { + strings[i] = id3_ucs4_duplicate(ptrs[i]); + if (strings[i] == 0) { + while (i--) + free(strings[i]); + + free(strings); + return -1; + } + } + + field->stringlist.strings = strings; + field->stringlist.nstrings = length; + + return 0; +} + +/* + * NAME: field->addstring() + * DESCRIPTION: add a string to a stringlist field + */ +int id3_field_addstring(union id3_field *field, id3_ucs4_t const *string) +{ + id3_ucs4_t *new, **strings; + + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGLIST) + return -1; + + if (string == 0) + string = id3_ucs4_empty; + + new = id3_ucs4_duplicate(string); + if (new == 0) + return -1; + + strings = realloc(field->stringlist.strings, + (field->stringlist.nstrings + 1) * sizeof(*strings)); + if (strings == 0) { + free(new); + return -1; + } + + field->stringlist.strings = strings; + field->stringlist.strings[field->stringlist.nstrings++] = new; + + return 0; +} + +/* + * NAME: field->setlanguage() + * DESCRIPTION: set the value of a language field + */ +int id3_field_setlanguage(union id3_field *field, char const *language) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_LANGUAGE) + return -1; + + id3_field_finish(field); + + if (language) { + if (strlen(language) != 3) + return -1; + + strcpy(field->immediate.value, language); + } + + return 0; +} + +/* + * NAME: field->setframeid() + * DESCRIPTION: set the value of a frameid field + */ +int id3_field_setframeid(union id3_field *field, char const *id) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_FRAMEID || + !id3_frame_validid(id)) + return -1; + + id3_field_finish(field); + + field->immediate.value[0] = id[0]; + field->immediate.value[1] = id[1]; + field->immediate.value[2] = id[2]; + field->immediate.value[3] = id[3]; + field->immediate.value[4] = 0; + + return 0; +} + +/* + * NAME: field->setbinarydata() + * DESCRIPTION: set the value of a binarydata field + */ +int id3_field_setbinarydata(union id3_field *field, + id3_byte_t const *data, id3_length_t length) +{ + id3_byte_t *mem; + + assert(field); + + if (field->type != ID3_FIELD_TYPE_BINARYDATA) + return -1; + + id3_field_finish(field); + + if (length == 0) + mem = 0; + else { + mem = malloc(length); + if (mem == 0) + return -1; + + assert(data); + + memcpy(mem, data, length); + } + + field->binary.data = mem; + field->binary.length = length; + + return 0; +} + +/* + * NAME: field->getint() + * DESCRIPTION: return the value of an integer field + */ +signed long id3_field_getint(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_INT8 && + field->type != ID3_FIELD_TYPE_INT16 && + field->type != ID3_FIELD_TYPE_INT24 && + field->type != ID3_FIELD_TYPE_INT32) + return -1; + + return field->number.value; +} + +/* + * NAME: field->getlatin1() + * DESCRIPTION: return the value of a latin1 field + */ +id3_latin1_t const *id3_field_getlatin1(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_LATIN1) + return 0; + + return field->latin1.ptr ? field->latin1.ptr : (id3_latin1_t const *) ""; +} + +/* + * NAME: field->getfulllatin1() + * DESCRIPTION: return the value of a full latin1 field + */ +id3_latin1_t const *id3_field_getfulllatin1(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_LATIN1FULL) + return 0; + + return field->latin1.ptr ? field->latin1.ptr : (id3_latin1_t const *) ""; +} + +/* + * NAME: field->getstring() + * DESCRIPTION: return the value of a string field + */ +id3_ucs4_t const *id3_field_getstring(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRING) + return 0; + + return field->string.ptr ? field->string.ptr : id3_ucs4_empty; +} + +/* + * NAME: field->getfullstring() + * DESCRIPTION: return the value of a fullstring field + */ +id3_ucs4_t const *id3_field_getfullstring(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGFULL) + return 0; + + return field->string.ptr ? field->string.ptr : id3_ucs4_empty; +} + +/* + * NAME: field->getnstrings() + * DESCRIPTION: return the number of strings in a stringlist field + */ +unsigned int id3_field_getnstrings(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGLIST) + return 0; + + return field->stringlist.nstrings; +} + +/* + * NAME: field->getstrings() + * DESCRIPTION: return one value of a stringlist field + */ +id3_ucs4_t const *id3_field_getstrings(union id3_field const *field, + unsigned int index) +{ + id3_ucs4_t const *string; + + assert(field); + + if (field->type != ID3_FIELD_TYPE_STRINGLIST || + index >= field->stringlist.nstrings) + return 0; + + string = field->stringlist.strings[index]; + + return string ? string : id3_ucs4_empty; +} + +/* + * NAME: field->getframeid() + * DESCRIPTION: return the value of a frameid field + */ +char const *id3_field_getframeid(union id3_field const *field) +{ + assert(field); + + if (field->type != ID3_FIELD_TYPE_FRAMEID) + return 0; + + return field->immediate.value; +} + +/* + * NAME: field->getbinarydata() + * DESCRIPTION: return the value of a binarydata field + */ +id3_byte_t const *id3_field_getbinarydata(union id3_field const *field, + id3_length_t *length) +{ + static id3_byte_t const empty; + + assert(field && length); + + if (field->type != ID3_FIELD_TYPE_BINARYDATA) + return 0; + + assert(field->binary.length == 0 || field->binary.data); + + *length = field->binary.length; + + return field->binary.data ? field->binary.data : ∅ +} |