public M15ModuleHeader()
{
samples = new M15SampleInfo[15];
for (int i = 0; i < samples.Length; i++)
{
samples[i] = new M15SampleInfo();
}
positions = new byte[128];
}
/*========== Loader code */
bool LoadModuleHeader(M15ModuleHeader mh)
{
int t, u;
mh.songname = m_Reader.Read_String(20);
/* sanity check : title should contain printable characters and a bunch
* of null chars */
for (t = 0; t < mh.songname.Length; t++)
{
if ((mh.songname[t] != 0) && (mh.songname[t] < 32))
{
return(false);
}
}
for (t = 0; (t < mh.songname.Length) && (mh.songname[t] != 0); t++)
{
;
}
if (t < 20)
{
for (; t < mh.songname.Length; t++)
{
if (mh.songname[t] != 0)
{
return(false);
}
}
}
for (t = 0; t < 15; t++)
{
M15SampleInfo s = mh.samples[t];
s.samplename = m_Reader.Read_String(22);
s.length = m_Reader.Read_Motorola_ushort();
s.finetune = m_Reader.Read_byte();
s.volume = m_Reader.Read_byte();
s.reppos = m_Reader.Read_Motorola_ushort();
s.replen = m_Reader.Read_Motorola_ushort();
/* sanity check : sample title should contain printable characters and
* a bunch of null chars */
for (u = 0; u < s.samplename.Length; u++)
{
if ((s.samplename[u] != 0) && (s.samplename[u] < /*32*/ 14))
{
return(false);
}
}
for (u = 0; (u < s.samplename.Length) && (s.samplename[u] != 0); u++)
{
;
}
if (u < 20)
{
for (; u < s.samplename.Length; u++)
{
if (s.samplename[u] != 0)
{
return(false);
}
}
}
/* sanity check : finetune values */
if ((s.finetune >> 4) != 0)
{
return(false);
}
}
mh.songlength = m_Reader.Read_byte();
mh.magic1 = m_Reader.Read_byte(); /* should be 127 */
/* sanity check : no more than 128 positions, restart position in range */
if ((mh.songlength == 0) || (mh.songlength > 128))
{
return(false);
}
/* values encountered so far are 0x6a and 0x78 */
if (((mh.magic1 & 0xf8) != 0x78) && (mh.magic1 != 0x6a) && (mh.magic1 > mh.songlength))
{
return(false);
}
m_Reader.Read_bytes(mh.positions, 128);
/* sanity check : pattern range is 0..63 */
for (t = 0; t < 128; t++)
{
if (mh.positions[t] > 63)
{
return(false);
}
}
return(!m_Reader.isEOF());
}
