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