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Added unicode conversion from cyrillic, greek, hebrew, arabic and thai.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3086 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg 2003-01-14 14:49:19 +00:00
parent 601d77dc63
commit 32bfc9940c
1 changed files with 41 additions and 7 deletions
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48
firmware/drivers/fat.c
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@ -1576,6 +1576,40 @@ int fat_opendir(struct fat_dir *dir, unsigned int startcluster)
return 0;
}
/* convert from unicode to a single-byte charset */
void unicode2iso(unsigned char* unicode, unsigned char* iso, int count )
{
int i;
for (i=0; i<count; i++) {
int x = i*2;
switch (unicode[x+1]) {
case 0x03: /* greek, convert to ISO 8859-7 */
iso[i] = unicode[x] + 0x30;
break;
/* Sergei says most russians use Win1251, so we will too.
Win1251 differs from ISO 8859-5 by an offset of 0x10. */
case 0x04: /* cyrillic, convert to Win1251 */
iso[i] = unicode[x] + 0xb0; /* 0xa0 for ISO 8859-5 */
break;
case 0x05: /* hebrew, convert to ISO 8859-8 */
iso[i] = unicode[x] + 0x10;
break;
case 0x06: /* arabic, convert to ISO 8859-6 */
case 0x0e: /* thai, convert to ISO 8859-11 */
iso[i] = unicode[x] + 0xa0;
break;
default:
iso[i] = unicode[x];
break;
}
}
}
int fat_getnext(struct fat_dir *dir, struct fat_direntry *entry)
{
bool done = false;
@ -1646,7 +1680,7 @@ int fat_getnext(struct fat_dir *dir, struct fat_direntry *entry)
/* replace shortname with longname? */
if ( longs ) {
int j,k,l=0;
int j,l=0;
/* iterate backwards through the dir entries */
for (j=longs-1; j>=0; j--) {
unsigned char* ptr = cached_buf;
@ -1670,12 +1704,12 @@ int fat_getnext(struct fat_dir *dir, struct fat_direntry *entry)
/* names are stored in unicode, but we
only grab the low byte (iso8859-1). */
for (k=0; k<5; k++)
entry->name[l++] = ptr[index + k*2 + 1];
for (k=0; k<6; k++)
entry->name[l++] = ptr[index + k*2 + 14];
for (k=0; k<2; k++)
entry->name[l++] = ptr[index + k*2 + 28];
unicode2iso(ptr + index + 1, entry->name + l, 5);
l+= 5;
unicode2iso(ptr + index + 14, entry->name + l, 6);
l+= 6;
unicode2iso(ptr + index + 28, entry->name + l, 2);
l+= 2;
}
entry->name[l]=0;
}