Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-04 18:13:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

vt: selection: handle storing of characters above U+FFFF

Browse Source 
Those above U+10FFFF get replaced with U+FFFD.

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adam Borowski 2018-07-18 04:10:43 +02:00 committed by Greg Kroah-Hartman
parent 9ca7f24998
commit df155d2d8c
1 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/tty/vt/selection.c
View File

@ -116,8 +116,8 @@ static inline int atedge(const int p, int size_row)
return (!(p % size_row) || !((p + 2) % size_row));
}
/* stores the char in UTF8 and returns the number of bytes used (1-3) */
static int store_utf8(u16 c, char *p)
/* stores the char in UTF8 and returns the number of bytes used (1-4) */
static int store_utf8(u32 c, char *p)
{
if (c < 0x80) {
/* 0******* */
@ -128,13 +128,26 @@ static int store_utf8(u16 c, char *p)
p[0] = 0xc0 | (c >> 6);
p[1] = 0x80 | (c & 0x3f);
return 2;
} else {
} else if (c < 0x10000) {
/* 1110**** 10****** 10****** */
p[0] = 0xe0 | (c >> 12);
p[1] = 0x80 | ((c >> 6) & 0x3f);
p[2] = 0x80 | (c & 0x3f);
return 3;
}
} else if (c < 0x110000) {
/* 11110*** 10****** 10****** 10****** */
p[0] = 0xf0 | (c >> 18);
p[1] = 0x80 | ((c >> 12) & 0x3f);
p[2] = 0x80 | ((c >> 6) & 0x3f);
p[3] = 0x80 | (c & 0x3f);
return 4;
} else {
/* outside Unicode, replace with U+FFFD */
p[0] = 0xef;
p[1] = 0xbf;
p[2] = 0xbd;
return 3;
}
}
/**
@ -273,7 +286,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
sel_end = new_sel_end;
/* Allocate a new buffer before freeing the old one ... */
multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */
multiplier = use_unicode ? 4 : 1; /* chars can take up to 4 bytes */
bp = kmalloc_array((sel_end - sel_start) / 2 + 1, multiplier,
GFP_KERNEL);
if (!bp) {