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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <zlib.h>
#include "demolib_prefs.h"
#include "file.h"
#include "zfile.h"
#include "../exception.h"
#if DEMOLIB_DATA_ZLIB
ZFile::ZFile(File *basefile)
{
z_stream zs;
unsigned char *file_data = (unsigned char *)(basefile->get_data());
/* read the file length first */
this->length = file_data[0] | ((int)(file_data[1]) << 8) |
((int)(file_data[2]) << 16) | ((int)(file_data[3]) << 24);
this->data = (char *)(malloc(this->length));
if (this->data == NULL) {
throw new FatalException("Out of memory!");
}
memset(&zs, 0, sizeof(zs));
zs.next_in = (Bytef *)(file_data + 4);
zs.avail_in = basefile->data_length() - 4;
zs.next_out = (Bytef *)(this->data);
zs.avail_out = this->length;
if (inflateInit(&zs) != Z_OK ||
inflate(&zs, Z_FINISH) != Z_STREAM_END) {
throw new FatalException("zlib", zs.msg);
}
inflateEnd(&zs);
}
ZFile::~ZFile()
{
free(this->data);
}
char *ZFile::get_data()
{
return this->data;
}
int ZFile::data_length()
{
return this->length;
}
#endif /* DEMOLIB_DATA_ZLIB */
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