MVMString * MVM_string_decodestream_get_chars(MVMThreadContext *tc, MVMDecodeStream *ds,
MVMint32 chars, MVMint64 eof) {
MVMint32 missing;
/* If we request nothing, give empty string. */
if (chars == 0)
return tc->instance->str_consts.empty;
/* If we don't already have enough chars, try and decode more. */
missing = missing_chars(tc, ds, chars);
ds->result_size_guess = missing;
if (missing)
run_decode(tc, ds, &missing, NULL, DECODE_NOT_EOF);
/* If we've got enough, assemble a string. Otherwise, flag EOF and retry,
* falling back to returning what's available. */
if (missing_chars(tc, ds, chars) == 0) {
return take_chars(tc, ds, chars, 0);
}
else if (eof) {
reached_eof(tc, ds);
return missing_chars(tc, ds, chars) == 0
? take_chars(tc, ds, chars, 0)
: MVM_string_decodestream_get_all(tc, ds);
}
else {
return NULL;
}
}
MVMString * MVM_string_decodestream_get_chars(MVMThreadContext *tc, MVMDecodeStream *ds, MVMint32 chars) {
MVMint32 missing;
/* If we request nothing, give empty string. */
if (chars == 0)
return tc->instance->str_consts.empty;
/* If we don't already have enough chars, try and decode more. */
missing = missing_chars(tc, ds, chars);
if (missing)
run_decode(tc, ds, &missing, NULL);
/* If we've got enough, assemble a string. Otherwise, give up. */
if (missing_chars(tc, ds, chars) == 0)
return take_chars(tc, ds, chars, 0);
else
return NULL;
}
