module-avb: don't encode error as state

This commit is contained in:
Nils Tonnaett 2026-05-18 12:53:53 -07:00 committed by Wim Taymans
parent 2dd60fdbc6
commit 4831ba60af

View file

@ -4,6 +4,8 @@
#include "strings.h"
#include <stdbool.h>
typedef enum {
ST_START,
ST_A,
@ -13,12 +15,12 @@ typedef enum {
ST_E,
ST_F,
ST_G,
ST_ERROR,
} UTF8_STATE;
int validate_utf8 (const unsigned char *str, size_t len)
{
UTF8_STATE state = ST_START;
bool err = false;
for (unsigned int i = 0; i < len; ++i)
{
@ -63,32 +65,53 @@ int validate_utf8 (const unsigned char *str, size_t len)
}
else
{
state = ST_ERROR;
err = true;
}
break;
case ST_A:
state = (str[i] >= 0x80 && str[i] <= 0xBF) ? ST_START : ST_ERROR;
if (str[i] >= 0x80 && str[i] <= 0xBF)
state = ST_START;
else
err = true;
break;
case ST_B:
state = (str[i] >= 0x80 && str[i] <= 0xBF) ? ST_A : ST_ERROR;
if (str[i] >= 0x80 && str[i] <= 0xBF)
state = ST_A;
else
err = true;
break;
case ST_C:
state = (str[i] >= 0xA0 && str[i] <= 0xBF) ? ST_A : ST_ERROR;
if (str[i] >= 0xA0 && str[i] <= 0xBF)
state = ST_A;
else
err = true;
break;
case ST_D:
state = (str[i] >= 0x80 && str[i] <= 0x9F) ? ST_A : ST_ERROR;
if (str[i] >= 0x80 && str[i] <= 0x9F)
state = ST_A;
else
err = true;
break;
case ST_E:
state = (str[i] >= 0x80 && str[i] <= 0xBF) ? ST_B : ST_ERROR;
if (str[i] >= 0x80 && str[i] <= 0xBF)
state = ST_B;
else
err = true;
break;
case ST_F:
state = (str[i] >= 0x90 && str[i] <= 0xBF) ? ST_B : ST_ERROR;
if (str[i] >= 0x90 && str[i] <= 0xBF)
state = ST_B;
else
err = true;
break;
case ST_G:
state = (str[i] >= 0x80 && str[i] <= 0x8F) ? ST_B : ST_ERROR;
if (str[i] >= 0x80 && str[i] <= 0x8F)
state = ST_B;
else
err = true;
break;
}
if (state == ST_ERROR)
if (err == true)
{
return -1;
}