operations_shorthand_vorbiscomment.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:9k
源码类别:
Windows CE
开发平台:
C/C++
- /* metaflac - Command-line FLAC metadata editor
- * Copyright (C) 2001,2002,2003,2004,2005 Josh Coalson
- *
- * 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.
- */
- #include "options.h"
- #include "utils.h"
- #include "FLAC/assert.h"
- #include "share/utf8.h"
- #include <stdlib.h>
- #include <string.h>
- static FLAC__bool remove_vc_all(const char *filename, FLAC__StreamMetadata *block, FLAC__bool *needs_write);
- static FLAC__bool remove_vc_field(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write);
- static FLAC__bool remove_vc_firstfield(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write);
- static FLAC__bool set_vc_field(const char *filename, FLAC__StreamMetadata *block, const Argument_VcField *field, FLAC__bool *needs_write, FLAC__bool raw);
- static FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool *needs_write, FLAC__bool raw);
- static FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool raw);
- FLAC__bool do_shorthand_operation__vorbis_comment(const char *filename, FLAC__bool prefix_with_filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write, FLAC__bool raw)
- {
- FLAC__bool ok = true, found_vc_block = false;
- FLAC__StreamMetadata *block = 0;
- FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
- if(0 == iterator)
- die("out of memory allocating iterator");
- FLAC__metadata_iterator_init(iterator, chain);
- do {
- block = FLAC__metadata_iterator_get_block(iterator);
- if(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT)
- found_vc_block = true;
- } while(!found_vc_block && FLAC__metadata_iterator_next(iterator));
- if(!found_vc_block) {
- /* create a new block if necessary */
- if(operation->type == OP__SET_VC_FIELD || operation->type == OP__IMPORT_VC_FROM) {
- block = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
- if(0 == block)
- die("out of memory allocating VORBIS_COMMENT block");
- while(FLAC__metadata_iterator_next(iterator))
- ;
- if(!FLAC__metadata_iterator_insert_block_after(iterator, block)) {
- print_error_with_chain_status(chain, "%s: ERROR: adding new VORBIS_COMMENT block to metadata", filename);
- return false;
- }
- /* iterator is left pointing to new block */
- FLAC__ASSERT(FLAC__metadata_iterator_get_block(iterator) == block);
- }
- else {
- FLAC__metadata_iterator_delete(iterator);
- return ok;
- }
- }
- FLAC__ASSERT(0 != block);
- FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
- switch(operation->type) {
- case OP__SHOW_VC_VENDOR:
- write_vc_field(prefix_with_filename? filename : 0, &block->data.vorbis_comment.vendor_string, raw, stdout);
- break;
- case OP__SHOW_VC_FIELD:
- write_vc_fields(prefix_with_filename? filename : 0, operation->argument.vc_field_name.value, block->data.vorbis_comment.comments, block->data.vorbis_comment.num_comments, raw, stdout);
- break;
- case OP__REMOVE_VC_ALL:
- ok = remove_vc_all(filename, block, needs_write);
- break;
- case OP__REMOVE_VC_FIELD:
- ok = remove_vc_field(filename, block, operation->argument.vc_field_name.value, needs_write);
- break;
- case OP__REMOVE_VC_FIRSTFIELD:
- ok = remove_vc_firstfield(filename, block, operation->argument.vc_field_name.value, needs_write);
- break;
- case OP__SET_VC_FIELD:
- ok = set_vc_field(filename, block, &operation->argument.vc_field, needs_write, raw);
- break;
- case OP__IMPORT_VC_FROM:
- ok = import_vc_from(filename, block, &operation->argument.filename, needs_write, raw);
- break;
- case OP__EXPORT_VC_TO:
- ok = export_vc_to(filename, block, &operation->argument.filename, raw);
- break;
- default:
- ok = false;
- FLAC__ASSERT(0);
- break;
- };
- FLAC__metadata_iterator_delete(iterator);
- return ok;
- }
- /*
- * local routines
- */
- FLAC__bool remove_vc_all(const char *filename, FLAC__StreamMetadata *block, FLAC__bool *needs_write)
- {
- FLAC__ASSERT(0 != block);
- FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
- FLAC__ASSERT(0 != needs_write);
- if(0 != block->data.vorbis_comment.comments) {
- FLAC__ASSERT(block->data.vorbis_comment.num_comments > 0);
- if(!FLAC__metadata_object_vorbiscomment_resize_comments(block, 0)) {
- fprintf(stderr, "%s: ERROR: memory allocation failuren", filename);
- return false;
- }
- *needs_write = true;
- }
- else {
- FLAC__ASSERT(block->data.vorbis_comment.num_comments == 0);
- }
- return true;
- }
- FLAC__bool remove_vc_field(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write)
- {
- int n;
- FLAC__ASSERT(0 != needs_write);
- n = FLAC__metadata_object_vorbiscomment_remove_entries_matching(block, field_name);
- if(n < 0) {
- fprintf(stderr, "%s: ERROR: memory allocation failuren", filename);
- return false;
- }
- else if(n > 0)
- *needs_write = true;
- return true;
- }
- FLAC__bool remove_vc_firstfield(const char *filename, FLAC__StreamMetadata *block, const char *field_name, FLAC__bool *needs_write)
- {
- int n;
- FLAC__ASSERT(0 != needs_write);
- n = FLAC__metadata_object_vorbiscomment_remove_entry_matching(block, field_name);
- if(n < 0) {
- fprintf(stderr, "%s: ERROR: memory allocation failuren", filename);
- return false;
- }
- else if(n > 0)
- *needs_write = true;
- return true;
- }
- FLAC__bool set_vc_field(const char *filename, FLAC__StreamMetadata *block, const Argument_VcField *field, FLAC__bool *needs_write, FLAC__bool raw)
- {
- FLAC__StreamMetadata_VorbisComment_Entry entry;
- char *converted;
- FLAC__bool needs_free = false;
- FLAC__ASSERT(0 != block);
- FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
- FLAC__ASSERT(0 != field);
- FLAC__ASSERT(0 != needs_write);
- if(raw) {
- entry.entry = (FLAC__byte *)field->field;
- }
- else if(utf8_encode(field->field, &converted) >= 0) {
- entry.entry = (FLAC__byte *)converted;
- needs_free = true;
- }
- else {
- fprintf(stderr, "%s: ERROR: couldn't convert comment to UTF-8n", filename);
- return false;
- }
- entry.length = strlen((const char *)entry.entry);
- if(!FLAC__metadata_object_vorbiscomment_append_comment(block, entry, /*copy=*/true)) {
- if(needs_free)
- free(converted);
- fprintf(stderr, "%s: ERROR: memory allocation failuren", filename);
- return false;
- }
- else {
- *needs_write = true;
- if(needs_free)
- free(converted);
- return true;
- }
- }
- FLAC__bool import_vc_from(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool *needs_write, FLAC__bool raw)
- {
- FILE *f;
- char line[65536];
- FLAC__bool ret;
- if(0 == vc_filename->value || strlen(vc_filename->value) == 0) {
- fprintf(stderr, "%s: ERROR: empty import file namen", filename);
- return false;
- }
- if(0 == strcmp(vc_filename->value, "-"))
- f = stdin;
- else
- f = fopen(vc_filename->value, "r");
- if(0 == f) {
- fprintf(stderr, "%s: ERROR: can't open import file %sn", filename, vc_filename->value);
- return false;
- }
- ret = true;
- while(ret && !feof(f)) {
- fgets(line, sizeof(line), f);
- if(!feof(f)) {
- char *p = strchr(line, 'n');
- if(0 == p) {
- fprintf(stderr, "%s: ERROR: line too long, abortingn", vc_filename->value);
- ret = false;
- }
- else {
- const char *violation;
- Argument_VcField field;
- *p = ' ';
- memset(&field, 0, sizeof(Argument_VcField));
- if(!parse_vorbis_comment_field(line, &field.field, &field.field_name, &field.field_value, &field.field_value_length, &violation)) {
- FLAC__ASSERT(0 != violation);
- fprintf(stderr, "%s: ERROR: malformed vorbis comment field "%s",n %sn", vc_filename->value, line, violation);
- ret = false;
- }
- else {
- ret = set_vc_field(filename, block, &field, needs_write, raw);
- }
- if(0 != field.field)
- free(field.field);
- if(0 != field.field_name)
- free(field.field_name);
- if(0 != field.field_value)
- free(field.field_value);
- }
- }
- };
- if(f != stdin)
- fclose(f);
- return ret;
- }
- FLAC__bool export_vc_to(const char *filename, FLAC__StreamMetadata *block, const Argument_Filename *vc_filename, FLAC__bool raw)
- {
- FILE *f;
- FLAC__bool ret;
- if(0 == vc_filename->value || strlen(vc_filename->value) == 0) {
- fprintf(stderr, "%s: ERROR: empty export file namen", filename);
- return false;
- }
- if(0 == strcmp(vc_filename->value, "-"))
- f = stdout;
- else
- f = fopen(vc_filename->value, "w");
- if(0 == f) {
- fprintf(stderr, "%s: ERROR: can't open export file %sn", filename, vc_filename->value);
- return false;
- }
- ret = true;
- write_vc_fields(0, 0, block->data.vorbis_comment.comments, block->data.vorbis_comment.num_comments, raw, f);
- if(f != stdout)
- fclose(f);
- return ret;
- }