FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_entry_to_name_value_pair(const FLAC__StreamMetadata_VorbisComment_Entry entry, char **field_name, char **field_value)
{
FLAC__ASSERT(0 != entry.entry && entry.length > 0);
FLAC__ASSERT(0 != field_name);
FLAC__ASSERT(0 != field_value);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length))
return false;
{
const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length);
const size_t nn = eq-entry.entry;
const size_t nv = entry.length-nn-1; /* -1 for the '=' */
FLAC__ASSERT(0 != eq);
if(0 == eq)
return false; /* double protection */
if(0 == (*field_name = (char*)malloc(nn+1)))
return false;
if(0 == (*field_value = (char*)malloc(nv+1))) {
free(*field_name);
return false;
}
memcpy(*field_name, entry.entry, nn);
memcpy(*field_value, entry.entry+nn+1, nv);
(*field_name)[nn] = '\0';
(*field_value)[nv] = '\0';
}
return true;
}
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_set_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy)
{
FLAC__ASSERT(0 != object);
FLAC__ASSERT(comment_num < object->data.vorbis_comment.num_comments);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length))
return false;
return vorbiscomment_set_entry_(object, &object->data.vorbis_comment.comments[comment_num], &entry, copy);
}
FLAC__bool test_format(void)
{
unsigned i;
printf("\n+++ libFLAC unit test: format\n\n");
for(i = 0; i < sizeof(SAMPLE_RATES)/sizeof(SAMPLE_RATES[0]); i++) {
printf("testing FLAC__format_sample_rate_is_valid(%u)... ", SAMPLE_RATES[i].rate);
if(FLAC__format_sample_rate_is_valid(SAMPLE_RATES[i].rate) != SAMPLE_RATES[i].valid) {
printf("FAILED, expected %s, got %s\n", true_false_string_[SAMPLE_RATES[i].valid], true_false_string_[!SAMPLE_RATES[i].valid]);
return false;
}
printf("OK\n");
}
for(i = 0; i < sizeof(VCENTRY_NAMES)/sizeof(VCENTRY_NAMES[0]); i++) {
printf("testing FLAC__format_vorbiscomment_entry_name_is_legal(\"%s\")... ", VCENTRY_NAMES[i].string);
if(FLAC__format_vorbiscomment_entry_name_is_legal(VCENTRY_NAMES[i].string) != VCENTRY_NAMES[i].valid) {
printf("FAILED, expected %s, got %s\n", true_false_string_[VCENTRY_NAMES[i].valid], true_false_string_[!VCENTRY_NAMES[i].valid]);
return false;
}
printf("OK\n");
}
for(i = 0; i < sizeof(VCENTRY_VALUES)/sizeof(VCENTRY_VALUES[0]); i++) {
printf("testing FLAC__format_vorbiscomment_entry_value_is_legal(\"%s\", %u)... ", VCENTRY_VALUES[i].string, VCENTRY_VALUES[i].length);
if(FLAC__format_vorbiscomment_entry_value_is_legal(VCENTRY_VALUES[i].string, VCENTRY_VALUES[i].length) != VCENTRY_VALUES[i].valid) {
printf("FAILED, expected %s, got %s\n", true_false_string_[VCENTRY_VALUES[i].valid], true_false_string_[!VCENTRY_VALUES[i].valid]);
return false;
}
printf("OK\n");
}
for(i = 0; i < sizeof(VCENTRY_VALUES_NT)/sizeof(VCENTRY_VALUES_NT[0]); i++) {
printf("testing FLAC__format_vorbiscomment_entry_value_is_legal(\"%s\", -1)... ", VCENTRY_VALUES_NT[i].string);
if(FLAC__format_vorbiscomment_entry_value_is_legal(VCENTRY_VALUES_NT[i].string, (unsigned)(-1)) != VCENTRY_VALUES_NT[i].valid) {
printf("FAILED, expected %s, got %s\n", true_false_string_[VCENTRY_VALUES_NT[i].valid], true_false_string_[!VCENTRY_VALUES_NT[i].valid]);
return false;
}
printf("OK\n");
}
for(i = 0; i < sizeof(VCENTRIES)/sizeof(VCENTRIES[0]); i++) {
printf("testing FLAC__format_vorbiscomment_entry_is_legal(\"%s\", %u)... ", VCENTRIES[i].string, VCENTRIES[i].length);
if(FLAC__format_vorbiscomment_entry_is_legal(VCENTRIES[i].string, VCENTRIES[i].length) != VCENTRIES[i].valid) {
printf("FAILED, expected %s, got %s\n", true_false_string_[VCENTRIES[i].valid], true_false_string_[!VCENTRIES[i].valid]);
return false;
}
printf("OK\n");
}
printf("\nPASSED!\n");
return true;
}
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_replace_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool all, FLAC__bool copy)
{
FLAC__ASSERT(0 != entry.entry && entry.length > 0);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length))
return false;
{
int i;
unsigned field_name_length;
const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length);
FLAC__ASSERT(0 != eq);
if(0 == eq)
return false; /* double protection */
field_name_length = eq-entry.entry;
if((i = vorbiscomment_find_entry_from_(object, 0, (const char *)entry.entry, field_name_length)) >= 0) {
unsigned index = (unsigned)i;
if(!FLAC__metadata_object_vorbiscomment_set_comment(object, index, entry, copy))
return false;
if(all && (index+1 < object->data.vorbis_comment.num_comments)) {
for(i = vorbiscomment_find_entry_from_(object, index+1, (const char *)entry.entry, field_name_length); i >= 0; ) {
if(!FLAC__metadata_object_vorbiscomment_delete_comment(object, (unsigned)i))
return false;
if((unsigned)i < object->data.vorbis_comment.num_comments)
i = vorbiscomment_find_entry_from_(object, (unsigned)i, (const char *)entry.entry, field_name_length);
else
i = -1;
}
}
return true;
}
else
return FLAC__metadata_object_vorbiscomment_append_comment(object, entry, copy);
}
}
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_insert_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy)
{
FLAC__StreamMetadata_VorbisComment *vc;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__ASSERT(comment_num <= object->data.vorbis_comment.num_comments);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length))
return false;
vc = &object->data.vorbis_comment;
if(!FLAC__metadata_object_vorbiscomment_resize_comments(object, vc->num_comments+1))
return false;
/* move all comments >= comment_num forward one space */
memmove(&vc->comments[comment_num+1], &vc->comments[comment_num], sizeof(FLAC__StreamMetadata_VorbisComment_Entry)*(vc->num_comments-1-comment_num));
vc->comments[comment_num].length = 0;
vc->comments[comment_num].entry = 0;
return FLAC__metadata_object_vorbiscomment_set_comment(object, comment_num, entry, copy);
}
/* slight modification: no 'filename' arg, and errors are passed back in 'violation' instead of printed to stderr */
static FLAC__bool set_vc_field(FLAC__StreamMetadata *block, const Argument_VcField *field, FLAC__bool *needs_write, FLAC__bool raw, const char **violation)
{
FLAC__StreamMetadata_VorbisComment_Entry entry;
char *converted;
FLAC__ASSERT(0 != block);
FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__ASSERT(0 != field);
FLAC__ASSERT(0 != needs_write);
if(field->field_value_from_file) {
/* read the file into 'data' */
FILE *f = 0;
char *data = 0;
const off_t size = grabbag__file_get_filesize(field->field_value);
if(size < 0) {
*violation = "can't open file for tag value";
return false;
}
if(size >= 0x100000) { /* magic arbitrary limit, actual format limit is near 16MB */
*violation = "file for tag value is too large";
return false;
}
if(0 == (data = malloc(size+1)))
die("out of memory allocating tag value");
data[size] = '\0';
if(0 == (f = fopen(field->field_value, "rb")) || fread(data, 1, size, f) != (size_t)size) {
free(data);
if(f)
fclose(f);
*violation = "error while reading file for tag value";
return false;
}
fclose(f);
if(strlen(data) != (size_t)size) {
free(data);
*violation = "file for tag value has embedded NULs";
return false;
}
/* move 'data' into 'converted', converting to UTF-8 if necessary */
if(raw) {
converted = data;
}
else if(utf8_encode(data, &converted) >= 0) {
free(data);
}
else {
free(data);
*violation = "error converting file contents to UTF-8 for tag value";
return false;
}
/* create and entry and append it */
if(!FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, field->field_name, converted)) {
free(converted);
*violation = "file for tag value is not valid UTF-8";
return false;
}
free(converted);
if(!FLAC__metadata_object_vorbiscomment_append_comment(block, entry, /*copy=*/false)) {
*violation = "memory allocation failure";
return false;
}
*needs_write = true;
return true;
}
else {
FLAC__bool needs_free = false;
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 {
*violation = "error converting comment to UTF-8";
return false;
}
entry.length = strlen((const char *)entry.entry);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length)) {
if(needs_free)
free(converted);
/*
* our previous parsing has already established that the field
* name is OK, so it must be the field value
*/
*violation = "tag value for is not valid UTF-8";
return false;
}
if(!FLAC__metadata_object_vorbiscomment_append_comment(block, entry, /*copy=*/true)) {
if(needs_free)
free(converted);
*violation = "memory allocation failure";
return false;
}
*needs_write = true;
if(needs_free)
free(converted);
return true;
}
}
