sys/contrib/dev/acpica/source/compiler/prexpress.c

   1 /******************************************************************************
   2  *
   3  * Module Name: prexpress - Preprocessor #if expression support
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  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
  19  * property rights.
  20  *
  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
  27  *
  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;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  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.
  53  *
  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
  64  * make.
  65  *
  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
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  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.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  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
  88  * PARTICULAR PURPOSE.
  89  *
  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
  97  * LIMITED REMEDY.
  98  *
  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.
 113  *
 114  *****************************************************************************
 115  *
 116  * Alternatively, you may choose to be licensed under the terms of the
 117  * following license:
 118  *
 119  * Redistribution and use in source and binary forms, with or without
 120  * modification, are permitted provided that the following conditions
 121  * are met:
 122  * 1. Redistributions of source code must retain the above copyright
 123  *    notice, this list of conditions, and the following disclaimer,
 124  *    without modification.
 125  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 126  *    substantially similar to the "NO WARRANTY" disclaimer below
 127  *    ("Disclaimer") and any redistribution must be conditioned upon
 128  *    including a substantially similar Disclaimer requirement for further
 129  *    binary redistribution.
 130  * 3. Neither the names of the above-listed copyright holders nor the names
 131  *    of any contributors may be used to endorse or promote products derived
 132  *    from this software without specific prior written permission.
 133  *
 134  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 135  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 136  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 137  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 138  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 139  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 140  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 144  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 145  *
 146  * Alternatively, you may choose to be licensed under the terms of the
 147  * GNU General Public License ("GPL") version 2 as published by the Free
 148  * Software Foundation.
 149  *
 150  *****************************************************************************/
 151
 152 #include "aslcompiler.h"
 153
 154 #define _COMPONENT          ASL_PREPROCESSOR
 155         ACPI_MODULE_NAME    ("prexpress")
 156
 157 /* Local prototypes */
 158
 159 static char *
 160 PrExpandMacros (
 161     char                    *Line);
 162
 163
 164 #ifdef _UNDER_DEVELOPMENT
 165 /******************************************************************************
 166  *
 167  * FUNCTION:    PrUnTokenize
 168  *
 169  * PARAMETERS:  Buffer              - Token Buffer
 170  *              Next                - "Next" buffer from GetNextToken
 171  *
 172  * RETURN:      None
 173  *
 174  * DESCRIPTION: Un-tokenized the current token buffer. The implementation is
 175  *              to simply set the null inserted by GetNextToken to a blank.
 176  *              If Next is NULL, there were no tokens found in the Buffer,
 177  *              so there is nothing to do.
 178  *
 179  *****************************************************************************/
 180
 181 static void
 182 PrUnTokenize (
 183     char                    *Buffer,
 184     char                    *Next)
 185 {
 186     UINT32                  Length = strlen (Buffer);
 187
 188
 189     if (!Next)
 190     {
 191         return;
 192     }
 193
 194     if (Buffer[Length] != '\n')
 195     {
 196         Buffer[strlen(Buffer)] = ' ';
 197     }
 198 }
 199 #endif
 200
 201
 202 /******************************************************************************
 203  *
 204  * FUNCTION:    PrExpandMacros
 205  *
 206  * PARAMETERS:  Line                - Pointer into the current line
 207  *
 208  * RETURN:      Updated pointer into the current line
 209  *
 210  * DESCRIPTION: Expand any macros found in the current line buffer.
 211  *
 212  *****************************************************************************/
 213
 214 static char *
 215 PrExpandMacros (
 216     char                    *Line)
 217 {
 218     char                    *Token;
 219     char                    *ReplaceString;
 220     PR_DEFINE_INFO          *DefineInfo;
 221     ACPI_SIZE               TokenOffset;
 222     char                    *Next;
 223     int                     OffsetAdjust;
 224
 225
 226     strcpy (AslGbl_ExpressionTokenBuffer, AslGbl_CurrentLineBuffer);
 227     Token = PrGetNextToken (AslGbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next);
 228     OffsetAdjust = 0;
 229
 230     while (Token)
 231     {
 232         DefineInfo = PrMatchDefine (Token);
 233         if (DefineInfo)
 234         {
 235             if (DefineInfo->Body)
 236             {
 237                 /* This is a macro. TBD: Is this allowed? */
 238
 239                 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 240                     "Matched Macro: %s->%s\n",
 241                     AslGbl_CurrentLineNumber, DefineInfo->Identifier,
 242                     DefineInfo->Replacement);
 243
 244                 PrDoMacroInvocation (AslGbl_ExpressionTokenBuffer, Token,
 245                     DefineInfo, &Next);
 246             }
 247             else
 248             {
 249                 ReplaceString = DefineInfo->Replacement;
 250
 251                 /* Replace the name in the original line buffer */
 252
 253                 TokenOffset = Token - AslGbl_ExpressionTokenBuffer + OffsetAdjust;
 254                 PrReplaceData (
 255                     &AslGbl_CurrentLineBuffer[TokenOffset], strlen (Token),
 256                     ReplaceString, strlen (ReplaceString));
 257
 258                 /* Adjust for length difference between old and new name length */
 259
 260                 OffsetAdjust += strlen (ReplaceString) - strlen (Token);
 261
 262                 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 263                     "Matched #define within expression: %s->%s\n",
 264                     AslGbl_CurrentLineNumber, Token,
 265                     *ReplaceString ? ReplaceString : "(NULL STRING)");
 266             }
 267         }
 268
 269         Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next);
 270     }
 271
 272     return (Line);
 273 }
 274
 275
 276 /******************************************************************************
 277  *
 278  * FUNCTION:    PrIsDefined
 279  *
 280  * PARAMETERS:  Identifier          - Name to be resolved
 281  *
 282  * RETURN:      64-bit boolean integer value
 283  *
 284  * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
 285  *
 286  *****************************************************************************/
 287
 288 UINT64
 289 PrIsDefined (
 290     char                    *Identifier)
 291 {
 292     UINT64                  Value;
 293     PR_DEFINE_INFO          *DefineInfo;
 294
 295
 296     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 297         "**** Is defined?:  %s\n", AslGbl_CurrentLineNumber, Identifier);
 298
 299     Value = 0; /* Default is "Not defined" -- FALSE */
 300
 301     DefineInfo = PrMatchDefine (Identifier);
 302     if (DefineInfo)
 303     {
 304         Value = ACPI_UINT64_MAX; /* TRUE */
 305     }
 306
 307     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 308         "[#if defined %s] resolved to: %8.8X%8.8X\n",
 309         AslGbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
 310
 311     return (Value);
 312 }
 313
 314
 315 /******************************************************************************
 316  *
 317  * FUNCTION:    PrResolveDefine
 318  *
 319  * PARAMETERS:  Identifier          - Name to be resolved
 320  *
 321  * RETURN:      A 64-bit boolean integer value
 322  *
 323  * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
 324  *
 325  *****************************************************************************/
 326
 327 UINT64
 328 PrResolveDefine (
 329     char                    *Identifier)
 330 {
 331     UINT64                  Value;
 332     PR_DEFINE_INFO          *DefineInfo;
 333
 334
 335     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 336         "**** Resolve #define:  %s\n", AslGbl_CurrentLineNumber, Identifier);
 337
 338     Value = 0; /* Default is "Not defined" -- FALSE */
 339
 340     DefineInfo = PrMatchDefine (Identifier);
 341     if (DefineInfo)
 342     {
 343         Value = ACPI_UINT64_MAX; /* TRUE */
 344     }
 345
 346     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 347         "[#if defined %s] resolved to: %8.8X%8.8X\n",
 348         AslGbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
 349
 350     return (Value);
 351 }
 352
 353
 354 /******************************************************************************
 355  *
 356  * FUNCTION:    PrResolveIntegerExpression
 357  *
 358  * PARAMETERS:  Line                - Pointer to integer expression
 359  *              ReturnValue         - Where the resolved 64-bit integer is
 360  *                                    returned.
 361  *
 362  * RETURN:      Status
 363  *
 364  * DESCRIPTION: Resolve an integer expression to a single value. Supports
 365  *              both integer constants and labels.
 366  *
 367  *****************************************************************************/
 368
 369 ACPI_STATUS
 370 PrResolveIntegerExpression (
 371     char                    *Line,
 372     UINT64                  *ReturnValue)
 373 {
 374     UINT64                  Result;
 375     char                    *ExpandedLine;
 376
 377
 378     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 379         "**** Resolve #if:  %s\n", AslGbl_CurrentLineNumber, Line);
 380
 381     /* Expand all macros within the expression first */
 382
 383     ExpandedLine = PrExpandMacros (Line);
 384
 385     /* Now we can evaluate the expression */
 386
 387     Result = PrEvaluateExpression (ExpandedLine);
 388     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 389         "**** Expression Resolved to: %8.8X%8.8X\n",
 390         AslGbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result));
 391
 392     *ReturnValue = Result;
 393     return (AE_OK);
 394
 395 #if 0
 396 InvalidExpression:
 397
 398     ACPI_FREE (EvalBuffer);
 399     PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0);
 400     return (AE_ERROR);
 401
 402
 403 NormalExit:
 404
 405     DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
 406         "**** Expression Resolved to: %8.8X%8.8X\n",
 407         AslGbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1));
 408
 409     *ReturnValue = Value1;
 410     return (AE_OK);
 411 #endif
 412 }