1 /******************************************************************************
3 * Module Name: prexpress - Preprocessor #if expression support
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************/
116 #include "aslcompiler.h"
117 #include "dtcompiler.h"
120 #define _COMPONENT ASL_PREPROCESSOR
121 ACPI_MODULE_NAME ("prexpress")
123 /* Local prototypes */
130 #ifdef _UNDER_DEVELOPMENT
131 /******************************************************************************
133 * FUNCTION: PrUnTokenize
135 * PARAMETERS: Buffer - Token Buffer
136 * Next - "Next" buffer from GetNextToken
140 * DESCRIPTION: Un-tokenized the current token buffer. The implementation is
141 * to simply set the null inserted by GetNextToken to a blank.
142 * If Next is NULL, there were no tokens found in the Buffer,
143 * so there is nothing to do.
145 *****************************************************************************/
152 UINT32 Length = strlen (Buffer);
159 if (Buffer[Length] != '\n')
161 Buffer[strlen(Buffer)] = ' ';
167 /******************************************************************************
169 * FUNCTION: PrExpandMacros
171 * PARAMETERS: Line - Pointer into the current line
173 * RETURN: Updated pointer into the current line
175 * DESCRIPTION: Expand any macros found in the current line buffer.
177 *****************************************************************************/
185 PR_DEFINE_INFO *DefineInfo;
186 ACPI_SIZE TokenOffset;
191 strcpy (Gbl_ExpressionTokenBuffer, Gbl_CurrentLineBuffer);
192 Token = PrGetNextToken (Gbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next);
197 DefineInfo = PrMatchDefine (Token);
200 if (DefineInfo->Body)
202 /* This is a macro. TBD: Is this allowed? */
204 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
205 "Matched Macro: %s->%s\n",
206 Gbl_CurrentLineNumber, DefineInfo->Identifier,
207 DefineInfo->Replacement);
209 PrDoMacroInvocation (Gbl_ExpressionTokenBuffer, Token,
214 ReplaceString = DefineInfo->Replacement;
216 /* Replace the name in the original line buffer */
218 TokenOffset = Token - Gbl_ExpressionTokenBuffer + OffsetAdjust;
220 &Gbl_CurrentLineBuffer[TokenOffset], strlen (Token),
221 ReplaceString, strlen (ReplaceString));
223 /* Adjust for length difference between old and new name length */
225 OffsetAdjust += strlen (ReplaceString) - strlen (Token);
227 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
228 "Matched #define within expression: %s->%s\n",
229 Gbl_CurrentLineNumber, Token,
230 *ReplaceString ? ReplaceString : "(NULL STRING)");
234 Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next);
241 /******************************************************************************
243 * FUNCTION: PrIsDefined
245 * PARAMETERS: Identifier - Name to be resolved
247 * RETURN: 64-bit boolean integer value
249 * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
251 *****************************************************************************/
258 PR_DEFINE_INFO *DefineInfo;
261 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
262 "**** Is defined?: %s\n", Gbl_CurrentLineNumber, Identifier);
264 Value = 0; /* Default is "Not defined" -- FALSE */
266 DefineInfo = PrMatchDefine (Identifier);
269 Value = ACPI_UINT64_MAX; /* TRUE */
272 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
273 "[#if defined %s] resolved to: %8.8X%8.8X\n",
274 Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
280 /******************************************************************************
282 * FUNCTION: PrResolveDefine
284 * PARAMETERS: Identifier - Name to be resolved
286 * RETURN: A 64-bit boolean integer value
288 * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
290 *****************************************************************************/
297 PR_DEFINE_INFO *DefineInfo;
300 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
301 "**** Resolve #define: %s\n", Gbl_CurrentLineNumber, Identifier);
303 Value = 0; /* Default is "Not defined" -- FALSE */
305 DefineInfo = PrMatchDefine (Identifier);
308 Value = ACPI_UINT64_MAX; /* TRUE */
311 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
312 "[#if defined %s] resolved to: %8.8X%8.8X\n",
313 Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
319 /******************************************************************************
321 * FUNCTION: PrResolveIntegerExpression
323 * PARAMETERS: Line - Pointer to integer expression
324 * ReturnValue - Where the resolved 64-bit integer is
329 * DESCRIPTION: Resolve an integer expression to a single value. Supports
330 * both integer constants and labels.
332 *****************************************************************************/
335 PrResolveIntegerExpression (
343 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
344 "**** Resolve #if: %s\n", Gbl_CurrentLineNumber, Line);
346 /* Expand all macros within the expression first */
348 ExpandedLine = PrExpandMacros (Line);
350 /* Now we can evaluate the expression */
352 Result = PrEvaluateExpression (ExpandedLine);
353 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
354 "**** Expression Resolved to: %8.8X%8.8X\n",
355 Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result));
357 *ReturnValue = Result;
363 ACPI_FREE (EvalBuffer);
364 PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0);
370 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
371 "**** Expression Resolved to: %8.8X%8.8X\n",
372 Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1));
374 *ReturnValue = Value1;