static void do_woz_META(deark *c, struct de_iffctx *ictx,
const struct de_iffchunkctx *chunkctx)
{
i64 k;
int reading_val;
de_ucstring *s = NULL;
de_ucstring *name = NULL;
de_ucstring *val = NULL;
// Read the entire metadata string.
s = ucstring_create(c);
dbuf_read_to_ucstring_n(ictx->f, chunkctx->dpos, chunkctx->dlen,
65536, s, 0, DE_ENCODING_UTF8);
// Parse out the individual metadata items
name = ucstring_create(c);
val = ucstring_create(c);
reading_val = 0;
for(k=0; k<s->len; k++) {
i32 ch = s->str[k];
if(ch==0x0a) { // End of item
do_woz_print_metadata_item(c, name, val);
ucstring_empty(name);
ucstring_empty(val);
reading_val = 0;
}
else if(ch==0x09 && !reading_val) { // Name/value separator
reading_val = 1;
}
else { // A non-special character
if(reading_val) {
ucstring_append_char(val, ch);
}
else {
ucstring_append_char(name, ch);
}
}
}
do_woz_print_metadata_item(c, name, val);
ucstring_destroy(s);
ucstring_destroy(name);
ucstring_destroy(val);
}
// Append s2 to s1
void ucstring_append_ucstring(de_ucstring *s1, const de_ucstring *s2)
{
de_int64 i;
if(!s2) return;
// TODO: This could be done more efficiently.
for(i=0; i<s2->len; i++) {
ucstring_append_char(s1, s2->str[i]);
}
}
void ucstring_append_bytes(de_ucstring *s, const de_byte *buf, de_int64 buflen,
unsigned int conv_flags, int encoding)
{
int ret;
de_int64 pos = 0;
de_int32 ch;
de_int64 code_len;
// Adjust buflen if necessary.
if(conv_flags & DE_CONVFLAG_STOP_AT_NUL) {
char *tmpp;
tmpp = de_memchr(buf, 0, (size_t)buflen);
if(tmpp) {
buflen = (const de_byte*)tmpp - buf;
}
}
while(pos<buflen) {
if(encoding==DE_ENCODING_UTF8) {
ret = de_utf8_to_uchar(&buf[pos], buflen-pos, &ch, &code_len);
if(!ret) {
ch = '_';
code_len = 1;
}
}
else if(encoding==DE_ENCODING_UTF16LE) {
ret = de_utf16x_to_uchar(&buf[pos], buflen-pos, &ch, &code_len, 1);
if(!ret) {
ch = '_';
code_len = 2;
}
}
else if(encoding==DE_ENCODING_UTF16BE) {
ret = de_utf16x_to_uchar(&buf[pos], buflen-pos, &ch, &code_len, 0);
if(!ret) {
ch = '_';
code_len = 2;
}
}
else {
ch = de_char_to_unicode(s->c, buf[pos], encoding);
if(ch==DE_INVALID_CODEPOINT) {
ch = '_';
}
code_len = 1;
}
ucstring_append_char(s, ch);
pos += code_len;
}
}
