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Add efidp_format_device_path_node to format a single node in a device

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path, much like efidp_format_device_path will format the entire path.

Sponsored by: Netflix
This commit is contained in:
Warner Losh 2017-11-26 16:12:10 +00:00
parent 2b6a8dd52c
commit 5320ef6adf
2 changed files with 24 additions and 4 deletions
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26
lib/libefivar/efivar-dp-format.c
View file

@ -2272,7 +2272,6 @@ static const DEVICE_PATH_TO_TEXT_TABLE mUefiDevicePathLibToTextTable[] = {
{0, 0, NULL}
};
#ifndef __FreeBSD__
/**
Converts a device node to its string representation.
@ -2288,7 +2287,7 @@ static const DEVICE_PATH_TO_TEXT_TABLE mUefiDevicePathLibToTextTable[] = {
is NULL or there was insufficient memory.
**/
CHAR16 *
static char *
EFIAPI
UefiDevicePathLibConvertDeviceNodeToText (
IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,
@ -2299,6 +2298,7 @@ UefiDevicePathLibConvertDeviceNodeToText (
POOL_PRINT Str;
UINTN Index;
DEVICE_PATH_TO_TEXT ToText;
EFI_DEVICE_PATH_PROTOCOL *Node;
if (DeviceNode == NULL) {
return NULL;
@ -2310,6 +2310,7 @@ UefiDevicePathLibConvertDeviceNodeToText (
// Process the device path node
// If not found, use a generic function
//
Node = __DECONST(EFI_DEVICE_PATH_PROTOCOL *, DeviceNode);
ToText = DevPathToTextNodeGeneric;
for (Index = 0; mUefiDevicePathLibToTextTable[Index].Function != NULL; Index++) {
if (DevicePathType (DeviceNode) == mUefiDevicePathLibToTextTable[Index].Type &&
@ -2323,12 +2324,11 @@ UefiDevicePathLibConvertDeviceNodeToText (
//
// Print this node
//
ToText (&Str, (VOID *) DeviceNode, DisplayOnly, AllowShortcuts);
ToText (&Str, (VOID *) Node, DisplayOnly, AllowShortcuts);
ASSERT (Str.Str != NULL);
return Str.Str;
}
#endif
/**
Converts a device path to its text representation.
@ -2431,8 +2431,26 @@ efidp_format_device_path(char *buf, size_t len, const_efidp dp, ssize_t max)
return retval;
}
ssize_t
efidp_format_device_path_node(char *buf, size_t len, const_efidp dp, ssize_t max)
{
char *str;
ssize_t retval;
str = UefiDevicePathLibConvertDeviceNodeToText (
__DECONST(EFI_DEVICE_PATH_PROTOCOL *, dp), FALSE, TRUE);
if (str == NULL)
return -1;
strlcpy(buf, str, len);
retval = strlen(str);
free(str);
return retval;
}
size_t
efidp_size(const_efidp dp)
{
return GetDevicePathSize(__DECONST(EFI_DEVICE_PATH_PROTOCOL *, dp));
}

2
lib/libefivar/efivar-dp.h
View file

@ -60,6 +60,8 @@ typedef const efidp_data *const_efidp;
*/
ssize_t efidp_format_device_path(char *buf, size_t len, const_efidp dp,
ssize_t max);
ssize_t efidp_format_device_path_node(char *buf, size_t len, const_efidp dp,
ssize_t max);
ssize_t efidp_parse_device_path(char *path, efidp out, size_t max);
size_t efidp_size(const_efidp);