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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <libsec.h>
#include "iso9660.h"
char*
jolietstring(uchar *buf, int len)
{
char *p, *q;
int i;
Rune *rp;
rp = emalloc(sizeof(Rune)*(len/2+1));
p = emalloc(UTFmax*(len/2+1));
for(i=0; i<len/2; i++)
rp[i] = (buf[2*i]<<8) | buf[2*i+1];
rp[i] = (Rune)'\0';
snprint(p, UTFmax*(len/2+1), "%S", rp);
q = atom(p);
free(p);
return q;
}
/*
* Joliet name validity check
*
* Joliet names have length at most 128 bytes (64 runes),
* and cannot contain '*', '/', ':', ';', '?', or '\'.
*/
int
isjolietfrog(Rune r)
{
return r=='*' || r=='/' || r==':'
|| r==';' || r=='?' || r=='\\';
}
int
isbadjoliet(char *s)
{
Rune r[256], *p;
if(utflen(s) > 64)
return 1;
strtorune(r, s);
for(p=r; *p; p++)
if(isjolietfrog(*p))
return 1;
return 0;
}
/*
* Joliet name comparison
*
* The standard algorithm is the ISO9660 algorithm but
* on the encoded Runes. Runes are encoded in big endian
* format, so we can just use runecmp.
*
* Padding is with zeros, but that still doesn't affect us.
*/
static Rune emptystring[] = { (Rune)0 };
int
jolietcmp(const void *va, const void *vb)
{
int i;
Rune s1[256], s2[256], *b1, *b2, *e1, *e2; /*BUG*/
const Direc *a, *b;
a = va;
b = vb;
b1 = strtorune(s1, a->confname);
b2 = strtorune(s2, b->confname);
if((e1 = runechr(b1, (Rune)'.')) != nil)
*e1++ = '\0';
else
e1 = emptystring;
if((e2 = runechr(b2, (Rune)'.')) != nil)
*e2++ = '\0';
else
e2 = emptystring;
if((i = runecmp(b1, b2)) != 0)
return i;
return runecmp(e1, e2);
}
/*
* Write a Joliet secondary volume descriptor.
*/
void
Cputjolietsvd(Cdimg *cd, Cdinfo info)
{
Cputc(cd, 2); /* secondary volume descriptor */
Cputs(cd, "CD001", 5); /* standard identifier */
Cputc(cd, 1); /* volume descriptor version */
Cputc(cd, 0); /* unused */
Cputrscvt(cd, "Joliet Plan 9", 32); /* system identifier */
Cputrscvt(cd, info.volumename, 32); /* volume identifier */
Crepeat(cd, 0, 8); /* unused */
Cputn(cd, 0, 4); /* volume space size */
Cputc(cd, 0x25); /* escape sequences: UCS-2 Level 2 */
Cputc(cd, 0x2F);
Cputc(cd, 0x43);
Crepeat(cd, 0, 29);
Cputn(cd, 1, 2); /* volume set size */
Cputn(cd, 1, 2); /* volume sequence number */
Cputn(cd, Blocksize, 2); /* logical block size */
Cputn(cd, 0, 4); /* path table size */
Cputnl(cd, 0, 4); /* location of Lpath */
Cputnl(cd, 0, 4); /* location of optional Lpath */
Cputnm(cd, 0, 4); /* location of Mpath */
Cputnm(cd, 0, 4); /* location of optional Mpath */
Cputjolietdir(cd, nil, DTroot, 1, Cwoffset(cd)); /* root directory */
Cputrscvt(cd, info.volumeset, 128); /* volume set identifier */
Cputrscvt(cd, info.publisher, 128); /* publisher identifier */
Cputrscvt(cd, info.preparer, 128); /* data preparer identifier */
Cputrscvt(cd, info.application, 128); /* application identifier */
Cputrscvt(cd, "", 37); /* copyright notice */
Cputrscvt(cd, "", 37); /* abstract */
Cputrscvt(cd, "", 37); /* bibliographic file */
Cputdate1(cd, now); /* volume creation date */
Cputdate1(cd, now); /* volume modification date */
Cputdate1(cd, 0); /* volume expiration date */
Cputdate1(cd, 0); /* volume effective date */
Cputc(cd, 1); /* file structure version */
Cpadblock(cd);
}
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