[mirror_edk2.git] / MdeModulePkg / Universal / RegularExpressionDxe / RegularExpressionDxe.c

/** @file\r
\r
  EFI_REGULAR_EXPRESSION_PROTOCOL Implementation\r
\r
  (C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "RegularExpressionDxe.h"\r
\r
STATIC\r
EFI_REGEX_SYNTAX_TYPE * CONST mSupportedSyntaxes[] = {\r
  &gEfiRegexSyntaxTypePosixExtendedGuid,\r
  &gEfiRegexSyntaxTypePerlGuid\r
};\r
\r
STATIC\r
EFI_REGULAR_EXPRESSION_PROTOCOL mProtocolInstance = {\r
  RegularExpressionMatch,\r
  RegularExpressionGetInfo\r
};\r
\r
\r
\r
#define CHAR16_ENCODING ONIG_ENCODING_UTF16_LE\r
\r
/**\r
  Call the Oniguruma regex match API.\r
\r
  Same parameters as RegularExpressionMatch, except SyntaxType is required.\r
\r
  @param String         A pointer to a NULL terminated string to match against the\r
                        regular expression string specified by Pattern.\r
\r
  @param Pattern        A pointer to a NULL terminated string that represents the\r
                        regular expression.\r
  @param SyntaxType     A pointer to the EFI_REGEX_SYNTAX_TYPE that identifies the\r
                        regular expression syntax type to use. May be NULL in which\r
                        case the function will use its default regular expression\r
                        syntax type.\r
\r
  @param Result         On return, points to TRUE if String fully matches against\r
                        the regular expression Pattern using the regular expression\r
                        SyntaxType. Otherwise, points to FALSE.\r
\r
  @param Captures       A Pointer to an array of EFI_REGEX_CAPTURE objects to receive\r
                        the captured groups in the event of a match. The full\r
                        sub-string match is put in Captures[0], and the results of N\r
                        capturing groups are put in Captures[1:N]. If Captures is\r
                        NULL, then this function doesn't allocate the memory for the\r
                        array and does not build up the elements. It only returns the\r
                        number of matching patterns in CapturesCount. If Captures is\r
                        not NULL, this function returns a pointer to an array and\r
                        builds up the elements in the array. CapturesCount is also\r
                        updated to the number of matching patterns found. It is the\r
                        caller's responsibility to free the memory pool in Captures\r
                        and in each CapturePtr in the array elements.\r
\r
  @param CapturesCount  On output, CapturesCount is the number of matching patterns\r
                        found in String. Zero means no matching patterns were found\r
                        in the string.\r
\r
  @retval  EFI_SUCCESS       Regex compilation and match completed successfully.\r
  @retval  EFI_DEVICE_ERROR  Regex compilation failed.\r
\r
**/\r
STATIC\r
EFI_STATUS\r
OnigurumaMatch (\r
  IN  CHAR16                *String,\r
  IN  CHAR16                *Pattern,\r
  IN  EFI_REGEX_SYNTAX_TYPE *SyntaxType,\r
  OUT BOOLEAN               *Result,\r
  OUT EFI_REGEX_CAPTURE     **Captures,     OPTIONAL\r
  OUT UINTN                 *CapturesCount\r
  )\r
{\r
  regex_t         *OnigRegex;\r
  OnigSyntaxType  *OnigSyntax;\r
  OnigRegion      *Region;\r
  INT32           OnigResult;\r
  OnigErrorInfo   ErrorInfo;\r
  OnigUChar       ErrorMessage[ONIG_MAX_ERROR_MESSAGE_LEN];\r
  UINT32          Index;\r
  OnigUChar       *Start;\r
  EFI_STATUS      Status;\r
\r
\r
  Status = EFI_SUCCESS;\r
\r
  //\r
  // Detemine the internal syntax type\r
  //\r
  OnigSyntax = ONIG_SYNTAX_DEFAULT;\r
  if (CompareGuid (SyntaxType, &gEfiRegexSyntaxTypePosixExtendedGuid)) {\r
    OnigSyntax = ONIG_SYNTAX_POSIX_EXTENDED;\r
  } else if (CompareGuid (SyntaxType, &gEfiRegexSyntaxTypePerlGuid)) {\r
    OnigSyntax = ONIG_SYNTAX_PERL;\r
  } else {\r
    DEBUG ((DEBUG_ERROR, "Unsupported regex syntax - using default\n"));\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  //\r
  // Compile pattern\r
  //\r
  Start = (OnigUChar*)Pattern;\r
  OnigResult = onig_new (\r
                 &OnigRegex,\r
                 Start,\r
                 Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
                 ONIG_OPTION_DEFAULT,\r
                 CHAR16_ENCODING,\r
                 OnigSyntax,\r
                 &ErrorInfo\r
                 );\r
\r
  if (OnigResult != ONIG_NORMAL) {\r
    onig_error_code_to_str (ErrorMessage, OnigResult, &ErrorInfo);\r
    DEBUG ((DEBUG_ERROR, "Regex compilation failed: %a\n", ErrorMessage));\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  //\r
  // Try to match\r
  //\r
  Start = (OnigUChar*)String;\r
  Region = onig_region_new ();\r
  if (Region == NULL) {\r
    onig_free (OnigRegex);\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
  OnigResult = onig_search (\r
                 OnigRegex,\r
                 Start,\r
                 Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
                 Start,\r
                 Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
                 Region,\r
                 ONIG_OPTION_NONE\r
                 );\r
\r
  if (OnigResult >= 0) {\r
    *Result = TRUE;\r
  } else {\r
    *Result = FALSE;\r
    if (OnigResult != ONIG_MISMATCH) {\r
      onig_error_code_to_str (ErrorMessage, OnigResult);\r
      DEBUG ((DEBUG_ERROR, "Regex match failed: %a\n", ErrorMessage));\r
      onig_region_free (Region, 1);\r
      onig_free (OnigRegex);\r
      return EFI_DEVICE_ERROR;\r
    }\r
  }\r
\r
  //\r
  // If successful, copy out the region (capture) information\r
  //\r
  if (*Result && Captures != NULL) {\r
    *CapturesCount = Region->num_regs;\r
    *Captures = AllocateZeroPool (*CapturesCount * sizeof(**Captures));\r
    if (*Captures != NULL) {\r
      for (Index = 0; Index < *CapturesCount; ++Index) {\r
        //\r
        // Region beg/end values represent bytes, not characters\r
        //\r
        (*Captures)[Index].Length = (Region->end[Index] - Region->beg[Index]) / sizeof(CHAR16);\r
        (*Captures)[Index].CapturePtr = AllocateCopyPool (\r
                                          ((*Captures)[Index].Length) * sizeof (CHAR16),\r
                                          (CHAR16*)((UINTN)String + Region->beg[Index])\r
                                          );\r
        if ((*Captures)[Index].CapturePtr == NULL) {\r
          Status = EFI_OUT_OF_RESOURCES;\r
          break;\r
        }\r
      }\r
\r
      if (EFI_ERROR (Status)) {\r
        for (Index = 0; Index < *CapturesCount; ++Index) {\r
          if ((*Captures)[Index].CapturePtr != NULL) {\r
            FreePool ((CHAR16*)(*Captures)[Index].CapturePtr);\r
          }\r
        }\r
        FreePool (*Captures);\r
      }\r
    }\r
  }\r
\r
  onig_region_free (Region, 1);\r
  onig_free (OnigRegex);\r
\r
  return Status;\r
}\r
\r
/**\r
  Returns information about the regular expression syntax types supported\r
  by the implementation.\r
\r
  @param This                      A pointer to the EFI_REGULAR_EXPRESSION_PROTOCOL\r
                                   instance.\r
\r
  @param  RegExSyntaxTypeListSize  On input, the size in bytes of RegExSyntaxTypeList.\r
                                   On output with a return code of EFI_SUCCESS, the\r
                                   size in bytes of the data returned in\r
                                   RegExSyntaxTypeList. On output with a return code\r
                                   of EFI_BUFFER_TOO_SMALL, the size of\r
                                   RegExSyntaxTypeList required to obtain the list.\r
\r
  @param   RegExSyntaxTypeList     A caller-allocated memory buffer filled by the\r
                                   driver with one EFI_REGEX_SYNTAX_TYPE element\r
                                   for each supported Regular expression syntax\r
                                   type. The list must not change across multiple\r
                                   calls to the same driver. The first syntax\r
                                   type in the list is the default type for the\r
                                   driver.\r
\r
  @retval EFI_SUCCESS            The regular expression syntax types list\r
                                 was returned successfully.\r
  @retval EFI_UNSUPPORTED        The service is not supported by this driver.\r
  @retval EFI_DEVICE_ERROR       The list of syntax types could not be\r
                                 retrieved due to a hardware or firmware error.\r
  @retval EFI_BUFFER_TOO_SMALL   The buffer RegExSyntaxTypeList is too small\r
                                 to hold the result.\r
  @retval EFI_INVALID_PARAMETER  RegExSyntaxTypeListSize is NULL\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RegularExpressionGetInfo (\r
  IN     EFI_REGULAR_EXPRESSION_PROTOCOL *This,\r
  IN OUT UINTN                           *RegExSyntaxTypeListSize,\r
  OUT    EFI_REGEX_SYNTAX_TYPE           *RegExSyntaxTypeList\r
  )\r
{\r
  UINTN SyntaxSize;\r
  UINTN Index;\r
\r
  if (This == NULL || RegExSyntaxTypeListSize == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if (*RegExSyntaxTypeListSize != 0 && RegExSyntaxTypeList == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  SyntaxSize = ARRAY_SIZE (mSupportedSyntaxes) * sizeof(**mSupportedSyntaxes);\r
\r
  if (*RegExSyntaxTypeListSize < SyntaxSize) {\r
    *RegExSyntaxTypeListSize = SyntaxSize;\r
    return EFI_BUFFER_TOO_SMALL;\r
  }\r
\r
  for (Index = 0; Index < ARRAY_SIZE (mSupportedSyntaxes); ++Index) {\r
    CopyMem (&RegExSyntaxTypeList[Index], mSupportedSyntaxes[Index], sizeof(**mSupportedSyntaxes));\r
  }\r
  *RegExSyntaxTypeListSize = SyntaxSize;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Checks if the input string matches to the regular expression pattern.\r
\r
  @param This          A pointer to the EFI_REGULAR_EXPRESSION_PROTOCOL instance.\r
                       Type EFI_REGULAR_EXPRESSION_PROTOCOL is defined in Section\r
                       XYZ.\r
\r
  @param String        A pointer to a NULL terminated string to match against the\r
                       regular expression string specified by Pattern.\r
\r
  @param Pattern       A pointer to a NULL terminated string that represents the\r
                       regular expression.\r
\r
  @param SyntaxType    A pointer to the EFI_REGEX_SYNTAX_TYPE that identifies the\r
                       regular expression syntax type to use. May be NULL in which\r
                       case the function will use its default regular expression\r
                       syntax type.\r
\r
  @param Result        On return, points to TRUE if String fully matches against\r
                       the regular expression Pattern using the regular expression\r
                       SyntaxType. Otherwise, points to FALSE.\r
\r
  @param Captures      A Pointer to an array of EFI_REGEX_CAPTURE objects to receive\r
                       the captured groups in the event of a match. The full\r
                       sub-string match is put in Captures[0], and the results of N\r
                       capturing groups are put in Captures[1:N]. If Captures is\r
                       NULL, then this function doesn't allocate the memory for the\r
                       array and does not build up the elements. It only returns the\r
                       number of matching patterns in CapturesCount. If Captures is\r
                       not NULL, this function returns a pointer to an array and\r
                       builds up the elements in the array. CapturesCount is also\r
                       updated to the number of matching patterns found. It is the\r
                       caller's responsibility to free the memory pool in Captures\r
                       and in each CapturePtr in the array elements.\r
\r
  @param CapturesCount On output, CapturesCount is the number of matching patterns\r
                       found in String. Zero means no matching patterns were found\r
                       in the string.\r
\r
  @retval EFI_SUCCESS            The regular expression string matching\r
                                 completed successfully.\r
  @retval EFI_UNSUPPORTED        The regular expression syntax specified by\r
                                 SyntaxType is not supported by this driver.\r
  @retval EFI_DEVICE_ERROR       The regular expression string matching\r
                                 failed due to a hardware or firmware error.\r
  @retval EFI_INVALID_PARAMETER  String, Pattern, Result, or CapturesCountis\r
                                 NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RegularExpressionMatch (\r
  IN  EFI_REGULAR_EXPRESSION_PROTOCOL *This,\r
  IN  CHAR16                          *String,\r
  IN  CHAR16                          *Pattern,\r
  IN  EFI_REGEX_SYNTAX_TYPE           *SyntaxType, OPTIONAL\r
  OUT BOOLEAN                         *Result,\r
  OUT EFI_REGEX_CAPTURE               **Captures, OPTIONAL\r
  OUT UINTN                           *CapturesCount\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINT32      Index;\r
  BOOLEAN     Supported;\r
\r
  if (This == NULL || String == NULL || Pattern == NULL || Result == NULL || CapturesCount == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Figure out which syntax to use\r
  //\r
  if (SyntaxType == NULL) {\r
    SyntaxType = mSupportedSyntaxes[0];\r
  } else {\r
    Supported = FALSE;\r
    for (Index = 0; Index < ARRAY_SIZE (mSupportedSyntaxes); ++Index) {\r
      if (CompareGuid (SyntaxType, mSupportedSyntaxes[Index])) {\r
        Supported = TRUE;\r
        break;\r
      }\r
    }\r
    if (!Supported) {\r
      return EFI_UNSUPPORTED;\r
    }\r
  }\r
\r
  Status = OnigurumaMatch (String, Pattern, SyntaxType, Result, Captures, CapturesCount);\r
\r
  return Status;\r
}\r
\r
/**\r
  Entry point for RegularExpressionDxe.\r
\r
  @param ImageHandle     Image handle this driver.\r
  @param SystemTable     Pointer to SystemTable.\r
\r
  @retval Status         Whether this function complete successfully.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RegularExpressionDxeEntry (\r
  IN  EFI_HANDLE        ImageHandle,\r
  IN  EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &ImageHandle,\r
                  &gEfiRegularExpressionProtocolGuid,\r
                  &mProtocolInstance,\r
                  NULL\r
                  );\r
\r
  return Status;\r
}\r
Commit	Line	Data
	1	/** @file\r
	2	\r
	3	EFI_REGULAR_EXPRESSION_PROTOCOL Implementation\r
	4	\r
	5	(C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>\r
	6	\r
	7	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	8	\r
	9	**/\r
	10	\r
	11	#include "RegularExpressionDxe.h"\r
	12	\r
	13	STATIC\r
	14	EFI_REGEX_SYNTAX_TYPE * CONST mSupportedSyntaxes[] = {\r
	15	&gEfiRegexSyntaxTypePosixExtendedGuid,\r
	16	&gEfiRegexSyntaxTypePerlGuid\r
	17	};\r
	18	\r
	19	STATIC\r
	20	EFI_REGULAR_EXPRESSION_PROTOCOL mProtocolInstance = {\r
	21	RegularExpressionMatch,\r
	22	RegularExpressionGetInfo\r
	23	};\r
	24	\r
	25	\r
	26	\r
	27	#define CHAR16_ENCODING ONIG_ENCODING_UTF16_LE\r
	28	\r
	29	/**\r
	30	Call the Oniguruma regex match API.\r
	31	\r
	32	Same parameters as RegularExpressionMatch, except SyntaxType is required.\r
	33	\r
	34	@param String A pointer to a NULL terminated string to match against the\r
	35	regular expression string specified by Pattern.\r
	36	\r
	37	@param Pattern A pointer to a NULL terminated string that represents the\r
	38	regular expression.\r
	39	@param SyntaxType A pointer to the EFI_REGEX_SYNTAX_TYPE that identifies the\r
	40	regular expression syntax type to use. May be NULL in which\r
	41	case the function will use its default regular expression\r
	42	syntax type.\r
	43	\r
	44	@param Result On return, points to TRUE if String fully matches against\r
	45	the regular expression Pattern using the regular expression\r
	46	SyntaxType. Otherwise, points to FALSE.\r
	47	\r
	48	@param Captures A Pointer to an array of EFI_REGEX_CAPTURE objects to receive\r
	49	the captured groups in the event of a match. The full\r
	50	sub-string match is put in Captures[0], and the results of N\r
	51	capturing groups are put in Captures[1:N]. If Captures is\r
	52	NULL, then this function doesn't allocate the memory for the\r
	53	array and does not build up the elements. It only returns the\r
	54	number of matching patterns in CapturesCount. If Captures is\r
	55	not NULL, this function returns a pointer to an array and\r
	56	builds up the elements in the array. CapturesCount is also\r
	57	updated to the number of matching patterns found. It is the\r
	58	caller's responsibility to free the memory pool in Captures\r
	59	and in each CapturePtr in the array elements.\r
	60	\r
	61	@param CapturesCount On output, CapturesCount is the number of matching patterns\r
	62	found in String. Zero means no matching patterns were found\r
	63	in the string.\r
	64	\r
	65	@retval EFI_SUCCESS Regex compilation and match completed successfully.\r
	66	@retval EFI_DEVICE_ERROR Regex compilation failed.\r
	67	\r
	68	**/\r
	69	STATIC\r
	70	EFI_STATUS\r
	71	OnigurumaMatch (\r
	72	IN CHAR16 *String,\r
	73	IN CHAR16 *Pattern,\r
	74	IN EFI_REGEX_SYNTAX_TYPE *SyntaxType,\r
	75	OUT BOOLEAN *Result,\r
	76	OUT EFI_REGEX_CAPTURE **Captures, OPTIONAL\r
	77	OUT UINTN *CapturesCount\r
	78	)\r
	79	{\r
	80	regex_t *OnigRegex;\r
	81	OnigSyntaxType *OnigSyntax;\r
	82	OnigRegion *Region;\r
	83	INT32 OnigResult;\r
	84	OnigErrorInfo ErrorInfo;\r
	85	OnigUChar ErrorMessage[ONIG_MAX_ERROR_MESSAGE_LEN];\r
	86	UINT32 Index;\r
	87	OnigUChar *Start;\r
	88	EFI_STATUS Status;\r
	89	\r
	90	\r
	91	Status = EFI_SUCCESS;\r
	92	\r
	93	//\r
	94	// Detemine the internal syntax type\r
	95	//\r
	96	OnigSyntax = ONIG_SYNTAX_DEFAULT;\r
	97	if (CompareGuid (SyntaxType, &gEfiRegexSyntaxTypePosixExtendedGuid)) {\r
	98	OnigSyntax = ONIG_SYNTAX_POSIX_EXTENDED;\r
	99	} else if (CompareGuid (SyntaxType, &gEfiRegexSyntaxTypePerlGuid)) {\r
	100	OnigSyntax = ONIG_SYNTAX_PERL;\r
	101	} else {\r
	102	DEBUG ((DEBUG_ERROR, "Unsupported regex syntax - using default\n"));\r
	103	return EFI_UNSUPPORTED;\r
	104	}\r
	105	\r
	106	//\r
	107	// Compile pattern\r
	108	//\r
	109	Start = (OnigUChar*)Pattern;\r
	110	OnigResult = onig_new (\r
	111	&OnigRegex,\r
	112	Start,\r
	113	Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
	114	ONIG_OPTION_DEFAULT,\r
	115	CHAR16_ENCODING,\r
	116	OnigSyntax,\r
	117	&ErrorInfo\r
	118	);\r
	119	\r
	120	if (OnigResult != ONIG_NORMAL) {\r
	121	onig_error_code_to_str (ErrorMessage, OnigResult, &ErrorInfo);\r
	122	DEBUG ((DEBUG_ERROR, "Regex compilation failed: %a\n", ErrorMessage));\r
	123	return EFI_DEVICE_ERROR;\r
	124	}\r
	125	\r
	126	//\r
	127	// Try to match\r
	128	//\r
	129	Start = (OnigUChar*)String;\r
	130	Region = onig_region_new ();\r
	131	if (Region == NULL) {\r
	132	onig_free (OnigRegex);\r
	133	return EFI_OUT_OF_RESOURCES;\r
	134	}\r
	135	OnigResult = onig_search (\r
	136	OnigRegex,\r
	137	Start,\r
	138	Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
	139	Start,\r
	140	Start + onigenc_str_bytelen_null (CHAR16_ENCODING, Start),\r
	141	Region,\r
	142	ONIG_OPTION_NONE\r
	143	);\r
	144	\r
	145	if (OnigResult >= 0) {\r
	146	*Result = TRUE;\r
	147	} else {\r
	148	*Result = FALSE;\r
	149	if (OnigResult != ONIG_MISMATCH) {\r
	150	onig_error_code_to_str (ErrorMessage, OnigResult);\r
	151	DEBUG ((DEBUG_ERROR, "Regex match failed: %a\n", ErrorMessage));\r
	152	onig_region_free (Region, 1);\r
	153	onig_free (OnigRegex);\r
	154	return EFI_DEVICE_ERROR;\r
	155	}\r
	156	}\r
	157	\r
	158	//\r
	159	// If successful, copy out the region (capture) information\r
	160	//\r
	161	if (*Result && Captures != NULL) {\r
	162	*CapturesCount = Region->num_regs;\r
	163	Captures = AllocateZeroPool (CapturesCount * sizeof(**Captures));\r
	164	if (*Captures != NULL) {\r
	165	for (Index = 0; Index < *CapturesCount; ++Index) {\r
	166	//\r
	167	// Region beg/end values represent bytes, not characters\r
	168	//\r
	169	(*Captures)[Index].Length = (Region->end[Index] - Region->beg[Index]) / sizeof(CHAR16);\r
	170	(*Captures)[Index].CapturePtr = AllocateCopyPool (\r
	171	((Captures)[Index].Length) sizeof (CHAR16),\r
	172	(CHAR16*)((UINTN)String + Region->beg[Index])\r
	173	);\r
	174	if ((*Captures)[Index].CapturePtr == NULL) {\r
	175	Status = EFI_OUT_OF_RESOURCES;\r
	176	break;\r
	177	}\r
	178	}\r
	179	\r
	180	if (EFI_ERROR (Status)) {\r
	181	for (Index = 0; Index < *CapturesCount; ++Index) {\r
	182	if ((*Captures)[Index].CapturePtr != NULL) {\r
	183	FreePool ((CHAR16)(Captures)[Index].CapturePtr);\r
	184	}\r
	185	}\r
	186	FreePool (*Captures);\r
	187	}\r
	188	}\r
	189	}\r
	190	\r
	191	onig_region_free (Region, 1);\r
	192	onig_free (OnigRegex);\r
	193	\r
	194	return Status;\r
	195	}\r
	196	\r
	197	/**\r
	198	Returns information about the regular expression syntax types supported\r
	199	by the implementation.\r
	200	\r
	201	@param This A pointer to the EFI_REGULAR_EXPRESSION_PROTOCOL\r
	202	instance.\r
	203	\r
	204	@param RegExSyntaxTypeListSize On input, the size in bytes of RegExSyntaxTypeList.\r
	205	On output with a return code of EFI_SUCCESS, the\r
	206	size in bytes of the data returned in\r
	207	RegExSyntaxTypeList. On output with a return code\r
	208	of EFI_BUFFER_TOO_SMALL, the size of\r
	209	RegExSyntaxTypeList required to obtain the list.\r
	210	\r
	211	@param RegExSyntaxTypeList A caller-allocated memory buffer filled by the\r
	212	driver with one EFI_REGEX_SYNTAX_TYPE element\r
	213	for each supported Regular expression syntax\r
	214	type. The list must not change across multiple\r
	215	calls to the same driver. The first syntax\r
	216	type in the list is the default type for the\r
	217	driver.\r
	218	\r
	219	@retval EFI_SUCCESS The regular expression syntax types list\r
	220	was returned successfully.\r
	221	@retval EFI_UNSUPPORTED The service is not supported by this driver.\r
	222	@retval EFI_DEVICE_ERROR The list of syntax types could not be\r
	223	retrieved due to a hardware or firmware error.\r
	224	@retval EFI_BUFFER_TOO_SMALL The buffer RegExSyntaxTypeList is too small\r
	225	to hold the result.\r
	226	@retval EFI_INVALID_PARAMETER RegExSyntaxTypeListSize is NULL\r
	227	\r
	228	**/\r
	229	EFI_STATUS\r
	230	EFIAPI\r
	231	RegularExpressionGetInfo (\r
	232	IN EFI_REGULAR_EXPRESSION_PROTOCOL *This,\r
	233	IN OUT UINTN *RegExSyntaxTypeListSize,\r
	234	OUT EFI_REGEX_SYNTAX_TYPE *RegExSyntaxTypeList\r
	235	)\r
	236	{\r
	237	UINTN SyntaxSize;\r
	238	UINTN Index;\r
	239	\r
	240	if (This == NULL \|\| RegExSyntaxTypeListSize == NULL) {\r
	241	return EFI_INVALID_PARAMETER;\r
	242	}\r
	243	\r
	244	if (*RegExSyntaxTypeListSize != 0 && RegExSyntaxTypeList == NULL) {\r
	245	return EFI_INVALID_PARAMETER;\r
	246	}\r
	247	\r
	248	SyntaxSize = ARRAY_SIZE (mSupportedSyntaxes) * sizeof(**mSupportedSyntaxes);\r
	249	\r
	250	if (*RegExSyntaxTypeListSize < SyntaxSize) {\r
	251	*RegExSyntaxTypeListSize = SyntaxSize;\r
	252	return EFI_BUFFER_TOO_SMALL;\r
	253	}\r
	254	\r
	255	for (Index = 0; Index < ARRAY_SIZE (mSupportedSyntaxes); ++Index) {\r
	256	CopyMem (&RegExSyntaxTypeList[Index], mSupportedSyntaxes[Index], sizeof(**mSupportedSyntaxes));\r
	257	}\r
	258	*RegExSyntaxTypeListSize = SyntaxSize;\r
	259	\r
	260	return EFI_SUCCESS;\r
	261	}\r
	262	\r
	263	/**\r
	264	Checks if the input string matches to the regular expression pattern.\r
	265	\r
	266	@param This A pointer to the EFI_REGULAR_EXPRESSION_PROTOCOL instance.\r
	267	Type EFI_REGULAR_EXPRESSION_PROTOCOL is defined in Section\r
	268	XYZ.\r
	269	\r
	270	@param String A pointer to a NULL terminated string to match against the\r
	271	regular expression string specified by Pattern.\r
	272	\r
	273	@param Pattern A pointer to a NULL terminated string that represents the\r
	274	regular expression.\r
	275	\r
	276	@param SyntaxType A pointer to the EFI_REGEX_SYNTAX_TYPE that identifies the\r
	277	regular expression syntax type to use. May be NULL in which\r
	278	case the function will use its default regular expression\r
	279	syntax type.\r
	280	\r
	281	@param Result On return, points to TRUE if String fully matches against\r
	282	the regular expression Pattern using the regular expression\r
	283	SyntaxType. Otherwise, points to FALSE.\r
	284	\r
	285	@param Captures A Pointer to an array of EFI_REGEX_CAPTURE objects to receive\r
	286	the captured groups in the event of a match. The full\r
	287	sub-string match is put in Captures[0], and the results of N\r
	288	capturing groups are put in Captures[1:N]. If Captures is\r
	289	NULL, then this function doesn't allocate the memory for the\r
	290	array and does not build up the elements. It only returns the\r
	291	number of matching patterns in CapturesCount. If Captures is\r
	292	not NULL, this function returns a pointer to an array and\r
	293	builds up the elements in the array. CapturesCount is also\r
	294	updated to the number of matching patterns found. It is the\r
	295	caller's responsibility to free the memory pool in Captures\r
	296	and in each CapturePtr in the array elements.\r
	297	\r
	298	@param CapturesCount On output, CapturesCount is the number of matching patterns\r
	299	found in String. Zero means no matching patterns were found\r
	300	in the string.\r
	301	\r
	302	@retval EFI_SUCCESS The regular expression string matching\r
	303	completed successfully.\r
	304	@retval EFI_UNSUPPORTED The regular expression syntax specified by\r
	305	SyntaxType is not supported by this driver.\r
	306	@retval EFI_DEVICE_ERROR The regular expression string matching\r
	307	failed due to a hardware or firmware error.\r
	308	@retval EFI_INVALID_PARAMETER String, Pattern, Result, or CapturesCountis\r
	309	NULL.\r
	310	\r
	311	**/\r
	312	EFI_STATUS\r
	313	EFIAPI\r
	314	RegularExpressionMatch (\r
	315	IN EFI_REGULAR_EXPRESSION_PROTOCOL *This,\r
	316	IN CHAR16 *String,\r
	317	IN CHAR16 *Pattern,\r
	318	IN EFI_REGEX_SYNTAX_TYPE *SyntaxType, OPTIONAL\r
	319	OUT BOOLEAN *Result,\r
	320	OUT EFI_REGEX_CAPTURE **Captures, OPTIONAL\r
	321	OUT UINTN *CapturesCount\r
	322	)\r
	323	{\r
	324	EFI_STATUS Status;\r
	325	UINT32 Index;\r
	326	BOOLEAN Supported;\r
	327	\r
	328	if (This == NULL \|\| String == NULL \|\| Pattern == NULL \|\| Result == NULL \|\| CapturesCount == NULL) {\r
	329	return EFI_INVALID_PARAMETER;\r
	330	}\r
	331	\r
	332	//\r
	333	// Figure out which syntax to use\r
	334	//\r
	335	if (SyntaxType == NULL) {\r
	336	SyntaxType = mSupportedSyntaxes[0];\r
	337	} else {\r
	338	Supported = FALSE;\r
	339	for (Index = 0; Index < ARRAY_SIZE (mSupportedSyntaxes); ++Index) {\r
	340	if (CompareGuid (SyntaxType, mSupportedSyntaxes[Index])) {\r
	341	Supported = TRUE;\r
	342	break;\r
	343	}\r
	344	}\r
	345	if (!Supported) {\r
	346	return EFI_UNSUPPORTED;\r
	347	}\r
	348	}\r
	349	\r
	350	Status = OnigurumaMatch (String, Pattern, SyntaxType, Result, Captures, CapturesCount);\r
	351	\r
	352	return Status;\r
	353	}\r
	354	\r
	355	/**\r
	356	Entry point for RegularExpressionDxe.\r
	357	\r
	358	@param ImageHandle Image handle this driver.\r
	359	@param SystemTable Pointer to SystemTable.\r
	360	\r
	361	@retval Status Whether this function complete successfully.\r
	362	\r
	363	**/\r
	364	EFI_STATUS\r
	365	EFIAPI\r
	366	RegularExpressionDxeEntry (\r
	367	IN EFI_HANDLE ImageHandle,\r
	368	IN EFI_SYSTEM_TABLE *SystemTable\r
	369	)\r
	370	{\r
	371	EFI_STATUS Status;\r
	372	\r
	373	Status = gBS->InstallMultipleProtocolInterfaces (\r
	374	&ImageHandle,\r
	375	&gEfiRegularExpressionProtocolGuid,\r
	376	&mProtocolInstance,\r
	377	NULL\r
	378	);\r
	379	\r
	380	return Status;\r
	381	}\r