BaseTools/Source/C/Common/ParseInf.c

   1 /** @file
   2
   3 Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   ParseInf.c
  15
  16 Abstract:
  17
  18   This contains some useful functions for parsing INF files.
  19
  20 --*/
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <ctype.h>
  25 #include <stdlib.h>
  26 #include "EfiUtilityMsgs.h"
  27 #include "ParseInf.h"
  28
  29 CHAR8 *
  30 ReadLine (
  31   IN MEMORY_FILE    *InputFile,
  32   IN OUT CHAR8      *InputBuffer,
  33   IN UINTN          MaxLength
  34   )
  35 /*++
  36
  37 Routine Description:
  38
  39   This function reads a line, stripping any comments.
  40   The function reads a string from the input stream argument and stores it in
  41   the input string. ReadLine reads characters from the current file position
  42   to and including the first newline character, to the end of the stream, or
  43   until the number of characters read is equal to MaxLength - 1, whichever
  44   comes first.  The newline character, if read, is replaced with a \0.
  45
  46 Arguments:
  47
  48   InputFile     Memory file image.
  49   InputBuffer   Buffer to read into, must be _MAX_PATH size.
  50   MaxLength     The maximum size of the input buffer.
  51
  52 Returns:
  53
  54   NULL if error or EOF
  55   InputBuffer otherwise
  56
  57 --*/
  58 {
  59   CHAR8 *CharPtr;
  60   CHAR8 *EndOfLine;
  61   UINTN CharsToCopy;
  62
  63   //
  64   // Verify input parameters are not null
  65   //
  66   assert (InputBuffer);
  67   assert (InputFile->FileImage);
  68   assert (InputFile->Eof);
  69   assert (InputFile->CurrentFilePointer);
  70
  71   //
  72   // Check for end of file condition
  73   //
  74   if (InputFile->CurrentFilePointer >= InputFile->Eof) {
  75     return NULL;
  76   }
  77   //
  78   // Find the next newline char
  79   //
  80   EndOfLine = strchr (InputFile->CurrentFilePointer, '\n');
  81
  82   //
  83   // Determine the number of characters to copy.
  84   //
  85   if (EndOfLine == 0) {
  86     //
  87     // If no newline found, copy to the end of the file.
  88     //
  89     CharsToCopy = InputFile->Eof - InputFile->CurrentFilePointer;
  90   } else if (EndOfLine >= InputFile->Eof) {
  91     //
  92     // If the newline found was beyond the end of file, copy to the eof.
  93     //
  94     CharsToCopy = InputFile->Eof - InputFile->CurrentFilePointer;
  95   } else {
  96     //
  97     // Newline found in the file.
  98     //
  99     CharsToCopy = EndOfLine - InputFile->CurrentFilePointer;
 100   }
 101   //
 102   // If the end of line is too big for the current buffer, set it to the max
 103   // size of the buffer (leaving room for the \0.
 104   //
 105   if (CharsToCopy > MaxLength - 1) {
 106     CharsToCopy = MaxLength - 1;
 107   }
 108   //
 109   // Copy the line.
 110   //
 111   memcpy (InputBuffer, InputFile->CurrentFilePointer, CharsToCopy);
 112
 113   //
 114   // Add the null termination over the 0x0D
 115   //
 116   if (InputBuffer[CharsToCopy - 1] == '\r') {
 117
 118     InputBuffer[CharsToCopy - 1] = '\0';
 119
 120   } else {
 121
 122     InputBuffer[CharsToCopy] = '\0';
 123
 124   }
 125
 126   //
 127   // Increment the current file pointer (include the 0x0A)
 128   //
 129   InputFile->CurrentFilePointer += CharsToCopy + 1;
 130
 131   //
 132   // Strip any comments
 133   //
 134   CharPtr = strstr (InputBuffer, "//");
 135   if (CharPtr != 0) {
 136     CharPtr[0] = 0;
 137   }
 138   //
 139   // Return the string
 140   //
 141   return InputBuffer;
 142 }
 143
 144 BOOLEAN
 145 FindSection (
 146   IN MEMORY_FILE    *InputFile,
 147   IN CHAR8          *Section
 148   )
 149 /*++
 150
 151 Routine Description:
 152
 153   This function parses a file from the beginning to find a section.
 154   The section string may be anywhere within a line.
 155
 156 Arguments:
 157
 158   InputFile     Memory file image.
 159   Section       Section to search for
 160
 161 Returns:
 162
 163   FALSE if error or EOF
 164   TRUE if section found
 165
 166 --*/
 167 {
 168   CHAR8 InputBuffer[_MAX_PATH];
 169   CHAR8 *CurrentToken;
 170
 171   //
 172   // Verify input is not NULL
 173   //
 174   assert (InputFile->FileImage);
 175   assert (InputFile->Eof);
 176   assert (InputFile->CurrentFilePointer);
 177   assert (Section);
 178
 179   //
 180   // Rewind to beginning of file
 181   //
 182   InputFile->CurrentFilePointer = InputFile->FileImage;
 183
 184   //
 185   // Read lines until the section is found
 186   //
 187   while (InputFile->CurrentFilePointer < InputFile->Eof) {
 188     //
 189     // Read a line
 190     //
 191     ReadLine (InputFile, InputBuffer, _MAX_PATH);
 192
 193     //
 194     // Check if the section is found
 195     //
 196     CurrentToken = strstr (InputBuffer, Section);
 197     if (CurrentToken != NULL) {
 198       return TRUE;
 199     }
 200   }
 201
 202   return FALSE;
 203 }
 204
 205 EFI_STATUS
 206 FindToken (
 207   IN MEMORY_FILE    *InputFile,
 208   IN CHAR8          *Section,
 209   IN CHAR8          *Token,
 210   IN UINTN          Instance,
 211   OUT CHAR8         *Value
 212   )
 213 /*++
 214
 215 Routine Description:
 216
 217   Finds a token value given the section and token to search for.
 218
 219 Arguments:
 220
 221   InputFile Memory file image.
 222   Section   The section to search for, a string within [].
 223   Token     The token to search for, e.g. EFI_PEIM_RECOVERY, followed by an = in the INF file.
 224   Instance  The instance of the token to search for.  Zero is the first instance.
 225   Value     The string that holds the value following the =.  Must be _MAX_PATH in size.
 226
 227 Returns:
 228
 229   EFI_SUCCESS             Value found.
 230   EFI_ABORTED             Format error detected in INF file.
 231   EFI_INVALID_PARAMETER   Input argument was null.
 232   EFI_LOAD_ERROR          Error reading from the file.
 233   EFI_NOT_FOUND           Section/Token/Value not found.
 234
 235 --*/
 236 {
 237   CHAR8   InputBuffer[_MAX_PATH];
 238   CHAR8   *CurrentToken;
 239   BOOLEAN ParseError;
 240   BOOLEAN ReadError;
 241   UINTN   Occurrance;
 242
 243   //
 244   // Check input parameters
 245   //
 246   if (InputFile->FileImage == NULL ||
 247       InputFile->Eof == NULL ||
 248       InputFile->CurrentFilePointer == NULL ||
 249       Section == NULL ||
 250       strlen (Section) == 0 ||
 251       Token == NULL ||
 252       strlen (Token) == 0 ||
 253       Value == NULL
 254       ) {
 255     return EFI_INVALID_PARAMETER;
 256   }
 257   //
 258   // Initialize error codes
 259   //
 260   ParseError  = FALSE;
 261   ReadError   = FALSE;
 262
 263   //
 264   // Initialize our instance counter for the search token
 265   //
 266   Occurrance = 0;
 267
 268   if (FindSection (InputFile, Section)) {
 269     //
 270     // Found the desired section, find and read the desired token
 271     //
 272     do {
 273       //
 274       // Read a line from the file
 275       //
 276       if (ReadLine (InputFile, InputBuffer, _MAX_PATH) == NULL) {
 277         //
 278         // Error reading from input file
 279         //
 280         ReadError = TRUE;
 281         break;
 282       }
 283       //
 284       // Get the first non-whitespace string
 285       //
 286       CurrentToken = strtok (InputBuffer, " \t\n");
 287       if (CurrentToken == NULL) {
 288         //
 289         // Whitespace line found (or comment) so continue
 290         //
 291         CurrentToken = InputBuffer;
 292         continue;
 293       }
 294       //
 295       // Make sure we have not reached the end of the current section
 296       //
 297       if (CurrentToken[0] == '[') {
 298         break;
 299       }
 300       //
 301       // Compare the current token with the desired token
 302       //
 303       if (strcmp (CurrentToken, Token) == 0) {
 304         //
 305         // Found it
 306         //
 307         //
 308         // Check if it is the correct instance
 309         //
 310         if (Instance == Occurrance) {
 311           //
 312           // Copy the contents following the =
 313           //
 314           CurrentToken = strtok (NULL, "= \t\n");
 315           if (CurrentToken == NULL) {
 316             //
 317             // Nothing found, parsing error
 318             //
 319             ParseError = TRUE;
 320           } else {
 321             //
 322             // Copy the current token to the output value
 323             //
 324             strcpy (Value, CurrentToken);
 325             return EFI_SUCCESS;
 326           }
 327         } else {
 328           //
 329           // Increment the occurrance found
 330           //
 331           Occurrance++;
 332         }
 333       }
 334     } while (
 335       !ParseError &&
 336       !ReadError &&
 337       InputFile->CurrentFilePointer < InputFile->Eof &&
 338       CurrentToken[0] != '[' &&
 339       Occurrance <= Instance
 340     );
 341   }
 342   //
 343   // Distinguish between read errors and INF file format errors.
 344   //
 345   if (ReadError) {
 346     return EFI_LOAD_ERROR;
 347   }
 348
 349   if (ParseError) {
 350     return EFI_ABORTED;
 351   }
 352
 353   return EFI_NOT_FOUND;
 354 }
 355
 356 EFI_STATUS
 357 StringToGuid (
 358   IN CHAR8      *AsciiGuidBuffer,
 359   OUT EFI_GUID  *GuidBuffer
 360   )
 361 /*++
 362
 363 Routine Description:
 364
 365   Converts a string to an EFI_GUID.  The string must be in the
 366   xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx format.
 367
 368 Arguments:
 369
 370   AsciiGuidBuffer - pointer to ascii string
 371   GuidBuffer      - pointer to destination Guid
 372
 373 Returns:
 374
 375   EFI_ABORTED             Could not convert the string
 376   EFI_SUCCESS             The string was successfully converted
 377   EFI_INVALID_PARAMETER   Input parameter is invalid.
 378
 379 --*/
 380 {
 381   INT32 Index;
 382   unsigned Data1;
 383   unsigned Data2;
 384   unsigned Data3;
 385   unsigned Data4[8];
 386
 387   if (AsciiGuidBuffer == NULL || GuidBuffer == NULL) {
 388     return EFI_INVALID_PARAMETER;
 389   }
 390   //
 391   // Check Guid Format strictly xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
 392   //
 393   for (Index = 0; AsciiGuidBuffer[Index] != '\0' && Index < 37; Index ++) {
 394     if (Index == 8 || Index == 13 || Index == 18 || Index == 23) {
 395       if (AsciiGuidBuffer[Index] != '-') {
 396         break;
 397       }
 398     } else {
 399       if (((AsciiGuidBuffer[Index] >= '0') && (AsciiGuidBuffer[Index] <= '9')) ||
 400          ((AsciiGuidBuffer[Index] >= 'a') && (AsciiGuidBuffer[Index] <= 'f')) ||
 401          ((AsciiGuidBuffer[Index] >= 'A') && (AsciiGuidBuffer[Index] <= 'F'))) {
 402         continue;
 403       } else {
 404         break;
 405       }
 406     }
 407   }
 408
 409   if (Index < 36 || AsciiGuidBuffer[36] != '\0') {
 410     Error (NULL, 0, 1003, "Invalid option value", "Incorrect GUID \"%s\"\n  Correct Format \"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\"", AsciiGuidBuffer);
 411     return EFI_ABORTED;
 412   }
 413
 414   //
 415   // Scan the guid string into the buffer
 416   //
 417   Index = sscanf (
 418             AsciiGuidBuffer,
 419             "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 420             &Data1,
 421             &Data2,
 422             &Data3,
 423             &Data4[0],
 424             &Data4[1],
 425             &Data4[2],
 426             &Data4[3],
 427             &Data4[4],
 428             &Data4[5],
 429             &Data4[6],
 430             &Data4[7]
 431             );
 432
 433   //
 434   // Verify the correct number of items were scanned.
 435   //
 436   if (Index != 11) {
 437     Error (NULL, 0, 1003, "Invalid option value", "Incorrect GUID \"%s\"\n  Correct Format \"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\"", AsciiGuidBuffer);
 438     return EFI_ABORTED;
 439   }
 440   //
 441   // Copy the data into our GUID.
 442   //
 443   GuidBuffer->Data1     = (UINT32) Data1;
 444   GuidBuffer->Data2     = (UINT16) Data2;
 445   GuidBuffer->Data3     = (UINT16) Data3;
 446   GuidBuffer->Data4[0]  = (UINT8) Data4[0];
 447   GuidBuffer->Data4[1]  = (UINT8) Data4[1];
 448   GuidBuffer->Data4[2]  = (UINT8) Data4[2];
 449   GuidBuffer->Data4[3]  = (UINT8) Data4[3];
 450   GuidBuffer->Data4[4]  = (UINT8) Data4[4];
 451   GuidBuffer->Data4[5]  = (UINT8) Data4[5];
 452   GuidBuffer->Data4[6]  = (UINT8) Data4[6];
 453   GuidBuffer->Data4[7]  = (UINT8) Data4[7];
 454
 455   return EFI_SUCCESS;
 456 }
 457
 458 EFI_STATUS
 459 AsciiStringToUint64 (
 460   IN CONST CHAR8  *AsciiString,
 461   IN BOOLEAN      IsHex,
 462   OUT UINT64      *ReturnValue
 463   )
 464 /*++
 465
 466 Routine Description:
 467
 468   Converts a null terminated ascii string that represents a number into a
 469   UINT64 value.  A hex number may be preceeded by a 0x, but may not be
 470   succeeded by an h.  A number without 0x or 0X is considered to be base 10
 471   unless the IsHex input is true.
 472
 473 Arguments:
 474
 475   AsciiString   The string to convert.
 476   IsHex         Force the string to be treated as a hex number.
 477   ReturnValue   The return value.
 478
 479 Returns:
 480
 481   EFI_SUCCESS   Number successfully converted.
 482   EFI_ABORTED   Invalid character encountered.
 483
 484 --*/
 485 {
 486   UINT8   Index;
 487   UINT64  Value;
 488   CHAR8   CurrentChar;
 489
 490   //
 491   // Initialize the result
 492   //
 493   Value = 0;
 494   Index = 0;
 495
 496   //
 497   // Check input paramter
 498   //
 499   if (AsciiString == NULL || ReturnValue == NULL) {
 500     return EFI_INVALID_PARAMETER;
 501   }
 502   while (AsciiString[Index] == ' ') {
 503     Index ++;
 504   }
 505
 506   //
 507   // Add each character to the result
 508   //
 509   if (IsHex || (AsciiString[Index] == '0' && (AsciiString[Index + 1] == 'x' || AsciiString[Index + 1] == 'X'))) {
 510     //
 511     // Convert the hex string.
 512     //
 513     for (Index = Index + 2; AsciiString[Index] != '\0'; Index++) {
 514       CurrentChar = AsciiString[Index];
 515       if (CurrentChar == ' ') {
 516         break;
 517       }
 518       //
 519       // Verify Hex string
 520       //
 521       if (isxdigit ((int)CurrentChar) == 0) {
 522         return EFI_ABORTED;
 523       }
 524       //
 525       // Add hex value
 526       //
 527       Value *= 16;
 528       if (CurrentChar >= '0' && CurrentChar <= '9') {
 529         Value += CurrentChar - '0';
 530       } else if (CurrentChar >= 'a' && CurrentChar <= 'f') {
 531         Value += CurrentChar - 'a' + 10;
 532       } else if (CurrentChar >= 'A' && CurrentChar <= 'F') {
 533         Value += CurrentChar - 'A' + 10;
 534       }
 535     }
 536
 537     *ReturnValue = Value;
 538   } else {
 539     //
 540     // Convert dec string is a number
 541     //
 542     for (; Index < strlen (AsciiString); Index++) {
 543       CurrentChar = AsciiString[Index];
 544       if (CurrentChar == ' ') {
 545         break;
 546       }
 547       //
 548       // Verify Dec string
 549       //
 550       if (isdigit ((int)CurrentChar) == 0) {
 551         return EFI_ABORTED;
 552       }
 553       //
 554       // Add dec value
 555       //
 556       Value = Value * 10;
 557       Value += CurrentChar - '0';
 558     }
 559
 560     *ReturnValue = Value;
 561   }
 562
 563   return EFI_SUCCESS;
 564 }
 565
 566 CHAR8 *
 567 ReadLineInStream (
 568   IN FILE       *InputFile,
 569   IN OUT CHAR8  *InputBuffer
 570   )
 571 /*++
 572
 573 Routine Description:
 574
 575   This function reads a line, stripping any comments.
 576   // BUGBUG:  This is obsolete once genmake goes away...
 577
 578 Arguments:
 579
 580   InputFile     Stream pointer.
 581   InputBuffer   Buffer to read into, must be _MAX_PATH size.
 582
 583 Returns:
 584
 585   NULL if error or EOF
 586   InputBuffer otherwise
 587
 588 --*/
 589 {
 590   CHAR8 *CharPtr;
 591
 592   //
 593   // Verify input parameters are not null
 594   //
 595   assert (InputFile);
 596   assert (InputBuffer);
 597
 598   //
 599   // Read a line
 600   //
 601   if (fgets (InputBuffer, _MAX_PATH, InputFile) == NULL) {
 602     return NULL;
 603   }
 604   //
 605   // Strip any comments
 606   //
 607   CharPtr = strstr (InputBuffer, "//");
 608   if (CharPtr != 0) {
 609     CharPtr[0] = 0;
 610   }
 611
 612   CharPtr = strstr (InputBuffer, "#");
 613   if (CharPtr != 0) {
 614     CharPtr[0] = 0;
 615   }
 616   //
 617   // Return the string
 618   //
 619   return InputBuffer;
 620 }
 621
 622 BOOLEAN
 623 FindSectionInStream (
 624   IN FILE       *InputFile,
 625   IN CHAR8      *Section
 626   )
 627 /*++
 628
 629 Routine Description:
 630
 631   This function parses a stream file from the beginning to find a section.
 632   The section string may be anywhere within a line.
 633   // BUGBUG:  This is obsolete once genmake goes away...
 634
 635 Arguments:
 636
 637   InputFile     Stream pointer.
 638   Section       Section to search for
 639
 640 Returns:
 641
 642   FALSE if error or EOF
 643   TRUE if section found
 644
 645 --*/
 646 {
 647   CHAR8 InputBuffer[_MAX_PATH];
 648   CHAR8 *CurrentToken;
 649
 650   //
 651   // Verify input is not NULL
 652   //
 653   assert (InputFile);
 654   assert (Section);
 655
 656   //
 657   // Rewind to beginning of file
 658   //
 659   if (fseek (InputFile, 0, SEEK_SET) != 0) {
 660     return FALSE;
 661   }
 662   //
 663   // Read lines until the section is found
 664   //
 665   while (feof (InputFile) == 0) {
 666     //
 667     // Read a line
 668     //
 669     ReadLineInStream (InputFile, InputBuffer);
 670
 671     //
 672     // Check if the section is found
 673     //
 674     CurrentToken = strstr (InputBuffer, Section);
 675     if (CurrentToken != NULL) {
 676       return TRUE;
 677     }
 678   }
 679
 680   return FALSE;
 681 }