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trivial: Add CRC8 as well

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This commit is contained in:
Richard Hughes 2020-09-25 18:00:21 +01:00
parent 6f5e35a3ea
commit 44ae2a75e4
7 changed files with 31 additions and 19 deletions
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26
libfwupdplugin/fu-common.c
View File

@ -2336,6 +2336,32 @@ fu_common_get_esp_for_path (const gchar *esp_path, GError **error)
return NULL;
}
/**
* fu_common_crc8:
* @buf: memory buffer
* @bufsz: sizeof buf
*
* Returns the cyclic redundancy check value for the given memory buffer.
*
* Returns: CRC value
*
* Since: 1.5.0
**/
guint8
fu_common_crc8 (const guint8 *buf, gsize bufsz)
{
guint32 crc = 0;
for (gsize j = bufsz; j > 0; j--) {
crc ^= (*(buf++) << 8);
for (guint32 i = 8; i; i--) {
if (crc & 0x8000)
crc ^= (0x1070 << 3);
crc <<= 1;
}
}
return ~((guint8) (crc >> 8));
}
/**
* fu_common_crc16:
* @buf: memory buffer

2
libfwupdplugin/fu-common.h
View File

@ -240,6 +240,8 @@ FuVolume *fu_common_get_esp_for_path (const gchar *esp_path,
GError **error);
FuVolume *fu_common_get_esp_default (GError **error);
guint8 fu_common_crc8 (const guint8 *buf,
gsize bufsz);
guint16 fu_common_crc16 (const guint8 *buf,
gsize bufsz);
guint32 fu_common_crc32 (const guint8 *buf,

1
libfwupdplugin/fu-self-test.c
View File

@ -111,6 +111,7 @@ static void
fu_common_crc_func (void)
{
guint8 buf[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09 };
g_assert_cmpint (fu_common_crc8 (buf, sizeof(buf)), ==, 0x7A);
g_assert_cmpint (fu_common_crc16 (buf, sizeof(buf)), ==, 0x4DF1);
g_assert_cmpint (fu_common_crc32 (buf, sizeof(buf)), ==, 0x40EFAB9E);
}

1
libfwupdplugin/fwupdplugin.map
View File

@ -616,6 +616,7 @@ LIBFWUPDPLUGIN_1.5.0 {
fu_common_crc16;
fu_common_crc32;
fu_common_crc32_full;
fu_common_crc8;
fu_common_filename_glob;
fu_common_is_cpu_intel;
fu_device_bind_driver;

15
plugins/vli/fu-vli-common.c
View File

@ -9,21 +9,6 @@
#include "fu-vli-common.h"
guint8
fu_vli_common_crc8 (const guint8 *buf, gsize bufsz)
{
guint32 crc = 0;
for (gsize j = bufsz; j > 0; j--) {
crc ^= (*(buf++) << 8);
for (guint32 i = 8; i; i--) {
if (crc & 0x8000)
crc ^= (0x1070 << 3);
crc <<= 1;
}
}
return (guint8) (crc >> 8);
}
const gchar *
fu_vli_common_device_kind_to_string (FuVliDeviceKind device_kind)
{

3
plugins/vli/fu-vli-common.h
View File

@ -43,6 +43,3 @@ const gchar *fu_vli_common_device_kind_to_string (FuVliDeviceKind device_kind);
FuVliDeviceKind fu_vli_common_device_kind_from_string (const gchar *device_kind);
guint32 fu_vli_common_device_kind_get_size (FuVliDeviceKind device_kind);
guint32 fu_vli_common_device_kind_get_offset (FuVliDeviceKind device_kind);
guint8 fu_vli_common_crc8 (const guint8 *buf,
gsize bufsz);

2
plugins/vli/fu-vli-usbhub-common.c
View File

@ -12,7 +12,7 @@
guint8
fu_vli_usbhub_header_crc8 (FuVliUsbhubHeader *hdr)
{
return fu_vli_common_crc8 ((const guint8 *) hdr, sizeof(*hdr) - 1);
return ~fu_common_crc8 ((const guint8 *) hdr, sizeof(*hdr) - 1);
}
void