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* grub-core/kern/efi/efi.c (grub_efi_get_variable): Add new function.

Browse source 
* include/grub/efi/efi.h: Likewise.
	* include/grub/efi/api.h: Add guid for EFI-specified variables.
	* include/grub/charset.h (GRUB_MAX_UTF16_PER_UTF8): New definition.
	* grub-core/normal/charset.c (grub_utf8_process): Move from here ...
	* include/grub/charset.h (grub_utf8_process): ... to here. Inline.
	* grub-core/normal/charset.c (grub_utf8_to_utf16): Move from here ...
	* include/grub/charset.h (grub_utf8_to_utf16): ... to here. Inline.
This commit is contained in:
Matthew Garrett 2012-02-27 12:02:57 +01:00 committed by Vladimir 'phcoder' Serbinenko
parent e33f8d692f
commit c598862958
6 changed files with 163 additions and 110 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2012-02-27 Matthew Garrett <mjg@redhat.com>
2012-02-27 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/kern/efi/efi.c (grub_efi_get_variable): Add new function.
* include/grub/efi/efi.h: Likewise.
* include/grub/efi/api.h: Add guid for EFI-specified variables.
* include/grub/charset.h (GRUB_MAX_UTF16_PER_UTF8): New definition.
* grub-core/normal/charset.c (grub_utf8_process): Move from here ...
* include/grub/charset.h (grub_utf8_process): ... to here. Inline.
* grub-core/normal/charset.c (grub_utf8_to_utf16): Move from here ...
* include/grub/charset.h (grub_utf8_to_utf16): ... to here. Inline.
2012-02-27 Matthew Garrett <mjg@redhat.com>
* include/grub/efi/pci.h: New file to define EFI PCI protocols.

39
grub-core/kern/efi/efi.c
View file

@ -182,6 +182,45 @@ grub_efi_set_virtual_address_map (grub_efi_uintn_t memory_map_size,
return grub_error (GRUB_ERR_IO, "set_virtual_address_map failed");
}
void *
grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid)
{
grub_efi_status_t status;
grub_efi_uintn_t datasize = 0;
grub_efi_runtime_services_t *r;
grub_efi_char16_t *var16;
void *data;
grub_size_t len, len16;
len = grub_strlen (var);
len16 = len * GRUB_MAX_UTF16_PER_UTF8;
var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
if (!var16)
return NULL;
len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
var16[len16] = 0;
r = grub_efi_system_table->runtime_services;
status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, NULL);
data = grub_malloc (datasize);
if (!data)
{
grub_free (var16);
return NULL;
}
status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, data);
grub_free (var16);
if (status == GRUB_EFI_SUCCESS)
return data;
grub_free (data);
return NULL;
}
grub_uint64_t
grub_rtc_get_time_ms (void)
{

101
grub-core/normal/charset.c
View file

@ -53,107 +53,6 @@
#include "widthspec.h"
#endif
int
grub_utf8_process (grub_uint8_t c, grub_uint32_t *code, int *count)
{
if (*count)
{
if ((c & GRUB_UINT8_2_LEADINGBITS) != GRUB_UINT8_1_LEADINGBIT)
{
*count = 0;
/* invalid */
return 0;
}
else
{
*code <<= 6;
*code |= (c & GRUB_UINT8_6_TRAILINGBITS);
(*count)--;
return 1;
}
}
if ((c & GRUB_UINT8_1_LEADINGBIT) == 0)
{
*code = c;
return 1;
}
if ((c & GRUB_UINT8_3_LEADINGBITS) == GRUB_UINT8_2_LEADINGBITS)
{
*count = 1;
*code = c & GRUB_UINT8_5_TRAILINGBITS;
return 1;
}
if ((c & GRUB_UINT8_4_LEADINGBITS) == GRUB_UINT8_3_LEADINGBITS)
{
*count = 2;
*code = c & GRUB_UINT8_4_TRAILINGBITS;
return 1;
}
if ((c & GRUB_UINT8_5_LEADINGBITS) == GRUB_UINT8_4_LEADINGBITS)
{
*count = 3;
*code = c & GRUB_UINT8_3_TRAILINGBITS;
return 1;
}
return 0;
}
/* Convert a (possibly null-terminated) UTF-8 string of at most SRCSIZE
bytes (if SRCSIZE is -1, it is ignored) in length to a UTF-16 string.
Return the number of characters converted. DEST must be able to hold
at least DESTSIZE characters. If an invalid sequence is found, return -1.
If SRCEND is not NULL, then *SRCEND is set to the next byte after the
last byte used in SRC. */
grub_size_t
grub_utf8_to_utf16 (grub_uint16_t *dest, grub_size_t destsize,
const grub_uint8_t *src, grub_size_t srcsize,
const grub_uint8_t **srcend)
{
grub_uint16_t *p = dest;
int count = 0;
grub_uint32_t code = 0;
if (srcend)
*srcend = src;
while (srcsize && destsize)
{
int was_count = count;
if (srcsize != (grub_size_t)-1)
srcsize--;
if (!grub_utf8_process (*src++, &code, &count))
{
code = '?';
count = 0;
/* Character c may be valid, don't eat it. */
if (was_count)
src--;
}
if (count != 0)
continue;
if (code == 0)
break;
if (destsize < 2 && code >= GRUB_UCS2_LIMIT)
break;
if (code >= GRUB_UCS2_LIMIT)
{
*p++ = GRUB_UTF16_UPPER_SURROGATE (code);
*p++ = GRUB_UTF16_LOWER_SURROGATE (code);
destsize -= 2;
}
else
{
*p++ = code;
destsize--;
}
}
if (srcend)
*srcend = src;
return p - dest;
}
/* Returns -2 if not enough space, -1 on invalid character. */
grub_ssize_t
grub_encode_utf8_character (grub_uint8_t *dest, grub_uint8_t *destend,

114
include/grub/charset.h
View file

@ -37,6 +37,10 @@
#define GRUB_UINT8_6_TRAILINGBITS 0x3f
#define GRUB_MAX_UTF8_PER_UTF16 4
/* You need at least one UTF-8 byte to have one UTF-16 word.
You need at least three UTF-8 bytes to have 2 UTF-16 words (surrogate pairs).
*/
#define GRUB_MAX_UTF16_PER_UTF8 1
#define GRUB_UCS2_LIMIT 0x10000
#define GRUB_UTF16_UPPER_SURROGATE(code) \
@ -44,10 +48,110 @@
#define GRUB_UTF16_LOWER_SURROGATE(code) \
(0xDC00 + (((code) - GRUB_UCS2_LIMIT) & 0xfff))
grub_size_t
/* Process one character from UTF8 sequence.
At beginning set *code = 0, *count = 0. Returns 0 on failure and
1 on success. *count holds the number of trailing bytes. */
static inline int
grub_utf8_process (grub_uint8_t c, grub_uint32_t *code, int *count)
{
if (*count)
{
if ((c & GRUB_UINT8_2_LEADINGBITS) != GRUB_UINT8_1_LEADINGBIT)
{
*count = 0;
/* invalid */
return 0;
}
else
{
*code <<= 6;
*code |= (c & GRUB_UINT8_6_TRAILINGBITS);
(*count)--;
return 1;
}
}
if ((c & GRUB_UINT8_1_LEADINGBIT) == 0)
{
*code = c;
return 1;
}
if ((c & GRUB_UINT8_3_LEADINGBITS) == GRUB_UINT8_2_LEADINGBITS)
{
*count = 1;
*code = c & GRUB_UINT8_5_TRAILINGBITS;
return 1;
}
if ((c & GRUB_UINT8_4_LEADINGBITS) == GRUB_UINT8_3_LEADINGBITS)
{
*count = 2;
*code = c & GRUB_UINT8_4_TRAILINGBITS;
return 1;
}
if ((c & GRUB_UINT8_5_LEADINGBITS) == GRUB_UINT8_4_LEADINGBITS)
{
*count = 3;
*code = c & GRUB_UINT8_3_TRAILINGBITS;
return 1;
}
return 0;
}
/* Convert a (possibly null-terminated) UTF-8 string of at most SRCSIZE
bytes (if SRCSIZE is -1, it is ignored) in length to a UTF-16 string.
Return the number of characters converted. DEST must be able to hold
at least DESTSIZE characters. If an invalid sequence is found, return -1.
If SRCEND is not NULL, then *SRCEND is set to the next byte after the
last byte used in SRC. */
static inline grub_size_t
grub_utf8_to_utf16 (grub_uint16_t *dest, grub_size_t destsize,
const grub_uint8_t *src, grub_size_t srcsize,
const grub_uint8_t **srcend);
const grub_uint8_t **srcend)
{
grub_uint16_t *p = dest;
int count = 0;
grub_uint32_t code = 0;
if (srcend)
*srcend = src;
while (srcsize && destsize)
{
int was_count = count;
if (srcsize != (grub_size_t)-1)
srcsize--;
if (!grub_utf8_process (*src++, &code, &count))
{
code = '?';
count = 0;
/* Character c may be valid, don't eat it. */
if (was_count)
src--;
}
if (count != 0)
continue;
if (code == 0)
break;
if (destsize < 2 && code >= GRUB_UCS2_LIMIT)
break;
if (code >= GRUB_UCS2_LIMIT)
{
*p++ = GRUB_UTF16_UPPER_SURROGATE (code);
*p++ = GRUB_UTF16_LOWER_SURROGATE (code);
destsize -= 2;
}
else
{
*p++ = code;
destsize--;
}
}
if (srcend)
*srcend = src;
return p - dest;
}
/* Determine the last position where the UTF-8 string [beg, end) can
be safely cut. */
@ -178,12 +282,6 @@ grub_ssize_t grub_utf8_to_ucs4_alloc (const char *msg,
grub_uint32_t **unicode_msg,
grub_uint32_t **last_position);
/* Process one character from UTF8 sequence.
At beginning set *code = 0, *count = 0. Returns 0 on failure and
1 on success. *count holds the number of trailing bytes. */
int
grub_utf8_process (grub_uint8_t c, grub_uint32_t *code, int *count);
void
grub_ucs4_to_utf8 (const grub_uint32_t *src, grub_size_t size,
grub_uint8_t *dest, grub_size_t destsize);

4
include/grub/efi/api.h
View file

@ -1048,6 +1048,10 @@ struct grub_efi_runtime_services
grub_efi_status_t
(*convert_pointer) (grub_efi_uintn_t debug_disposition, void **address);
#define GRUB_EFI_GLOBAL_VARIABLE_GUID \
{ 0x8BE4DF61, 0x93CA, 0x11d2, { 0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B,0x8C }}
grub_efi_status_t
(*get_variable) (grub_efi_char16_t *variable_name,
grub_efi_guid_t *vendor_guid,

3
include/grub/efi/efi.h
View file

@ -61,7 +61,8 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
grub_efi_uintn_t descriptor_size,
grub_efi_uint32_t descriptor_version,
grub_efi_memory_descriptor_t *virtual_map);
void *EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
const grub_efi_guid_t *guid);
int
EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
const grub_efi_device_path_t *dp2);