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cmd/ms: read #P/ps2mouse in a char (not in an int) 

After the removal of dumb push in crt0 (commit 929014ebca5c738d3854758326de7abfb77c1ef1)
the first byte of the c integer is not zeroed anymore (which is correct).

But since ms.c reads and bit-match a single byte in c, when it's an int some test success/fail
due to the state of the unused bytes.

This makes the mouse turn crazy.

So we turn it into a char, so that bitmasks and tests work as expected.
This commit is contained in:
Giacomo Tesio 2016-11-29 20:42:24 +01:00
parent 52777e21ab
commit 488106eaac
1 changed files with 6 additions and 6 deletions
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12
sys/src/cmd/ms.c
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@ -20,7 +20,7 @@ main(int argc, char *argv[])
int shift = 0;
int ps2fd;
int mousefd;
int c;
char c;
static short msg[4];
static int nb;
static uint8_t b[] = {0, 1, 4, 5, 2, 3, 6, 7, 0, 1, 2, 3, 2, 3, 6, 7 };
@ -43,7 +43,7 @@ main(int argc, char *argv[])
* but still set mouseshifted.
*/
//shift |= mouseshifted;
/*
/*
* check byte 0 for consistency
*/
if(nb==0 && (c&0xc8)!=0x08)
@ -52,7 +52,7 @@ main(int argc, char *argv[])
packetsize = 4;
continue;
}
msg[nb] = c;
if(++nb == packetsize){
nb = 0;
@ -60,7 +60,7 @@ main(int argc, char *argv[])
msg[1] |= 0xFF00;
if(msg[0] & 0x20)
msg[2] |= 0xFF00;
buttons = b[(msg[0]&7) | (shift ? 8 : 0)];
if(intellimouse && packetsize==4){
if((msg[3]&0xc8) == 0x08){
@ -83,9 +83,9 @@ main(int argc, char *argv[])
* and generate a single button 4 or 5 click
* accordingly.
*/
if((msg[3] >> 3) & 1)
if((msg[3] >> 3) & 1)
buttons |= 1<<3;
else if(msg[3] & 0x7)
else if(msg[3] & 0x7)
buttons |= 1<<4;
}
}