164 lines
3.0 KiB
C++
164 lines
3.0 KiB
C++
#include "pck_packer.h"
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#include "core/os/file_access.h"
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static uint64_t _align(uint64_t p_n, int p_alignment) {
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if (p_alignment == 0)
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return p_n;
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uint64_t rest = p_n % p_alignment;
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if (rest == 0)
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return p_n;
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else
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return p_n + (p_alignment - rest);
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};
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static void _pad(FileAccess* p_file, int p_bytes) {
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for (int i=0; i<p_bytes; i++) {
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p_file->store_8(0);
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};
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};
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void PCKPacker::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("pck_start","pck_name","alignment"),&PCKPacker::pck_start);
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ObjectTypeDB::bind_method(_MD("add_file","pck_path","source_path"),&PCKPacker::add_file);
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ObjectTypeDB::bind_method(_MD("flush"),&PCKPacker::flush);
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};
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Error PCKPacker::pck_start(const String& p_file, int p_alignment) {
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file = FileAccess::open(p_file, FileAccess::WRITE);
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if (file == NULL) {
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return ERR_CANT_CREATE;
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};
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alignment = p_alignment;
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file->store_32(0x43504447); // MAGIC
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file->store_32(0); // # version
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file->store_32(0); // # major
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file->store_32(0); // # minor
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file->store_32(0); // # revision
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for (int i=0; i<16; i++) {
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file->store_32(0); // reserved
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};
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files.clear();
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return OK;
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};
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Error PCKPacker::add_file(const String& p_file, const String& p_src) {
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FileAccess* f = FileAccess::open(p_src, FileAccess::READ);
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if (!f) {
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return ERR_FILE_CANT_OPEN;
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};
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File pf;
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pf.path = p_file;
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pf.src_path = p_src;
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pf.size = f->get_len();
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pf.offset_offset = 0;
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files.push_back(pf);
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f->close();
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memdelete(f);
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return OK;
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};
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Error PCKPacker::flush(bool p_verbose) {
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if (!file) {
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ERR_FAIL_COND_V(!file, ERR_INVALID_PARAMETER);
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return ERR_INVALID_PARAMETER;
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};
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// write the index
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file->store_32(files.size());
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for (int i=0; i<files.size(); i++) {
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file->store_pascal_string(files[i].path);
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files[i].offset_offset = file->get_pos();
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file->store_64(0); // offset
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file->store_64(files[i].size); // size
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// # empty md5
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file->store_32(0);
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file->store_32(0);
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file->store_32(0);
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file->store_32(0);
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};
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uint64_t ofs = file->get_pos();
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ofs = _align(ofs, alignment);
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_pad(file, ofs - file->get_pos());
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const uint32_t buf_max = 65536;
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uint8_t *buf = memnew_arr(uint8_t, buf_max);
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int count = 0;
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for (int i=0; i<files.size(); i++) {
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FileAccess* src = FileAccess::open(files[i].src_path, FileAccess::READ);
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uint64_t to_write = files[i].size;
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while (to_write > 0) {
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int read = src->get_buffer(buf, MIN(to_write, buf_max));
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file->store_buffer(buf, read);
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to_write -= read;
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};
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uint64_t pos = file->get_pos();
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file->seek(files[i].offset_offset); // go back to store the file's offset
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file->store_64(ofs);
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file->seek(pos);
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ofs = _align(ofs + files[i].size, alignment);
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_pad(file, ofs - pos);
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src->close();
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memdelete(src);
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count += 1;
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if (p_verbose) {
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if (count % 100 == 0) {
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printf("%i/%i (%.2f\%)\r", count, files.size(), float(count) / files.size() * 100);
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fflush(stdout);
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};
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};
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};
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if (p_verbose)
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printf("\n");
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file->close();
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return OK;
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};
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PCKPacker::PCKPacker() {
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file = NULL;
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};
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PCKPacker::~PCKPacker() {
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if (file != NULL) {
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memdelete(file);
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};
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file = NULL;
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};
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