Method set_code_buffer

bytecode/gdscript_v1_tokenizer_compat.cpp:1114–1192

#include "utility/common.h"

Error GDScriptV1TokenizerBufferCompat::set_code_buffer(const Vector<uint8_t> &p_buffer) {
	const uint8_t *buf = p_buffer.ptr();
	uint64_t total_len = p_buffer.size();
	GDSDECOMP_FAIL_COND_V_MSG(p_buffer.size() < 24 || !CHECK_GDSC_HEADER(p_buffer), ERR_INVALID_DATA, "Invalid GDScript token buffer.");
	int version = decode_uint32(&buf[4]);
	ERR_FAIL_COND_V_MSG(version >= GDScriptDecomp::GDSCRIPT_2_0_VERSION, ERR_INVALID_DATA, "Wrong function!");
	const int contents_start = 8 + (version >= GDScriptDecomp::GDSCRIPT_2_0_VERSION ? 4 : 0);
	uint32_t identifier_count = decode_uint32(&buf[contents_start]);
	uint32_t constant_count = decode_uint32(&buf[contents_start + 4]);
	uint32_t line_count = decode_uint32(&buf[contents_start + 8]);
	uint32_t token_count = decode_uint32(&buf[contents_start + 12]);

	const uint8_t *b = &buf[24];
	total_len -= 24;

	identifiers.resize(identifier_count);
	for (uint32_t i = 0; i < identifier_count; i++) {
		uint32_t len = decode_uint32(b);
		GDSDECOMP_FAIL_COND_V_MSG(len > total_len, ERR_INVALID_DATA, "Invalid identifier length.");
		b += 4;
		Vector<uint8_t> cs;
		cs.resize(len);
		for (uint32_t j = 0; j < len; j++) {
			cs.write[j] = b[j] ^ 0xb6;
		}

		cs.write[cs.size() - 1] = 0;
		String s;
		s.append_utf8((const char *)cs.ptr());
		b += len;
		total_len -= len + 4;
		identifiers.write[i] = s;
	}

	constants.resize(constant_count);
	for (uint32_t i = 0; i < constant_count; i++) {
		Variant v;
		int len;
		Error err = VariantDecoderCompat::decode_variant_compat(decomp->get_variant_ver_major(), v, b, total_len, &len);
		if (err) {
			error_message = RTR("Invalid constant");
			return err;
		}
		b += len;
		total_len -= len;
		constants.write[i] = v;
	}

	GDSDECOMP_FAIL_COND_V_MSG(line_count * /*sizeof(HashMap<uint32_t, uint32_t>::Pair)*/ 8 > total_len, ERR_INVALID_DATA, "Invalid line count.");

	for (uint32_t i = 0; i < line_count; i++) {
		uint32_t token_index = decode_uint32(b);
		b += 4;
		uint32_t linecol = decode_uint32(b);
		b += 4;

		lines.insert(token_index, linecol);
		total_len -= 8;