src/add-ons/kernel/bus_managers/acpi/acpica/components/utilities/utprint.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utprint - Formatted printing routines
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2014, 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 #include "acpi.h"
 117 #include "accommon.h"
 118
 119 #define _COMPONENT          ACPI_UTILITIES
 120         ACPI_MODULE_NAME    ("utprint")
 121
 122
 123 #define ACPI_FORMAT_SIGN            0x01
 124 #define ACPI_FORMAT_SIGN_PLUS       0x02
 125 #define ACPI_FORMAT_SIGN_PLUS_SPACE 0x04
 126 #define ACPI_FORMAT_ZERO            0x08
 127 #define ACPI_FORMAT_LEFT            0x10
 128 #define ACPI_FORMAT_UPPER           0x20
 129 #define ACPI_FORMAT_PREFIX          0x40
 130
 131
 132 /* Local prototypes */
 133
 134 static ACPI_SIZE
 135 AcpiUtBoundStringLength (
 136     const char              *String,
 137     ACPI_SIZE               Count);
 138
 139 static char *
 140 AcpiUtBoundStringOutput (
 141     char                    *String,
 142     const char              *End,
 143     char                    c);
 144
 145 static char *
 146 AcpiUtFormatNumber (
 147     char                    *String,
 148     char                    *End,
 149     UINT64                  Number,
 150     UINT8                   Base,
 151     INT32                   Width,
 152     INT32                   Precision,
 153     UINT8                   Type);
 154
 155 static char *
 156 AcpiUtPutNumber (
 157     char                    *String,
 158     UINT64                  Number,
 159     UINT8                   Base,
 160     BOOLEAN                 Upper);
 161
 162
 163 /* Module globals */
 164
 165 static const char           AcpiGbl_LowerHexDigits[] = "0123456789abcdef";
 166 static const char           AcpiGbl_UpperHexDigits[] = "0123456789ABCDEF";
 167
 168
 169 /*******************************************************************************
 170  *
 171  * FUNCTION:    AcpiUtBoundStringLength
 172  *
 173  * PARAMETERS:  String              - String with boundary
 174  *              Count               - Boundary of the string
 175  *
 176  * RETURN:      Length of the string. Less than or equal to Count.
 177  *
 178  * DESCRIPTION: Calculate the length of a string with boundary.
 179  *
 180  ******************************************************************************/
 181
 182 static ACPI_SIZE
 183 AcpiUtBoundStringLength (
 184     const char              *String,
 185     ACPI_SIZE               Count)
 186 {
 187     UINT32                  Length = 0;
 188
 189
 190     while (*String && Count)
 191     {
 192         Length++;
 193         String++;
 194         Count--;
 195     }
 196
 197     return (Length);
 198 }
 199
 200
 201 /*******************************************************************************
 202  *
 203  * FUNCTION:    AcpiUtBoundStringOutput
 204  *
 205  * PARAMETERS:  String              - String with boundary
 206  *              End                 - Boundary of the string
 207  *              c                   - Character to be output to the string
 208  *
 209  * RETURN:      Updated position for next valid character
 210  *
 211  * DESCRIPTION: Output a character into a string with boundary check.
 212  *
 213  ******************************************************************************/
 214
 215 static char *
 216 AcpiUtBoundStringOutput (
 217     char                    *String,
 218     const char              *End,
 219     char                    c)
 220 {
 221
 222     if (String < End)
 223     {
 224         *String = c;
 225     }
 226
 227     ++String;
 228     return (String);
 229 }
 230
 231
 232 /*******************************************************************************
 233  *
 234  * FUNCTION:    AcpiUtPutNumber
 235  *
 236  * PARAMETERS:  String              - Buffer to hold reverse-ordered string
 237  *              Number              - Integer to be converted
 238  *              Base                - Base of the integer
 239  *              Upper               - Whether or not using upper cased digits
 240  *
 241  * RETURN:      Updated position for next valid character
 242  *
 243  * DESCRIPTION: Convert an integer into a string, note that, the string holds a
 244  *              reversed ordered number without the trailing zero.
 245  *
 246  ******************************************************************************/
 247
 248 static char *
 249 AcpiUtPutNumber (
 250     char                    *String,
 251     UINT64                  Number,
 252     UINT8                   Base,
 253     BOOLEAN                 Upper)
 254 {
 255     const char              *Digits;
 256     UINT64                  DigitIndex;
 257     char                    *Pos;
 258
 259
 260     Pos = String;
 261     Digits = Upper ? AcpiGbl_UpperHexDigits : AcpiGbl_LowerHexDigits;
 262
 263     if (Number == 0)
 264     {
 265         *(Pos++) = '0';
 266     }
 267     else
 268     {
 269         while (Number)
 270         {
 271             (void) AcpiUtDivide (Number, Base, &Number, &DigitIndex);
 272             *(Pos++) = Digits[DigitIndex];
 273         }
 274     }
 275
 276     /* *(Pos++) = '0'; */
 277     return (Pos);
 278 }
 279
 280
 281 /*******************************************************************************
 282  *
 283  * FUNCTION:    AcpiUtScanNumber
 284  *
 285  * PARAMETERS:  String              - String buffer
 286  *              NumberPtr           - Where the number is returned
 287  *
 288  * RETURN:      Updated position for next valid character
 289  *
 290  * DESCRIPTION: Scan a string for a decimal integer.
 291  *
 292  ******************************************************************************/
 293
 294 const char *
 295 AcpiUtScanNumber (
 296     const char              *String,
 297     UINT64                  *NumberPtr)
 298 {
 299     UINT64                  Number = 0;
 300
 301
 302     while (ACPI_IS_DIGIT (*String))
 303     {
 304         Number *= 10;
 305         Number += *(String++) - '0';
 306     }
 307
 308     *NumberPtr = Number;
 309     return (String);
 310 }
 311
 312
 313 /*******************************************************************************
 314  *
 315  * FUNCTION:    AcpiUtPrintNumber
 316  *
 317  * PARAMETERS:  String              - String buffer
 318  *              Number              - The number to be converted
 319  *
 320  * RETURN:      Updated position for next valid character
 321  *
 322  * DESCRIPTION: Print a decimal integer into a string.
 323  *
 324  ******************************************************************************/
 325
 326 const char *
 327 AcpiUtPrintNumber (
 328     char                    *String,
 329     UINT64                  Number)
 330 {
 331     char                    AsciiString[20];
 332     const char              *Pos1;
 333     char                    *Pos2;
 334
 335
 336     Pos1 = AcpiUtPutNumber (AsciiString, Number, 10, FALSE);
 337     Pos2 = String;
 338
 339     while (Pos1 != AsciiString)
 340     {
 341         *(Pos2++) = *(--Pos1);
 342     }
 343
 344     *Pos2 = 0;
 345     return (String);
 346 }
 347
 348
 349 /*******************************************************************************
 350  *
 351  * FUNCTION:    AcpiUtFormatNumber
 352  *
 353  * PARAMETERS:  String              - String buffer with boundary
 354  *              End                 - Boundary of the string
 355  *              Number              - The number to be converted
 356  *              Base                - Base of the integer
 357  *              Width               - Field width
 358  *              Precision           - Precision of the integer
 359  *              Type                - Special printing flags
 360  *
 361  * RETURN:      Updated position for next valid character
 362  *
 363  * DESCRIPTION: Print an integer into a string with any base and any precision.
 364  *
 365  ******************************************************************************/
 366
 367 static char *
 368 AcpiUtFormatNumber (
 369     char                    *String,
 370     char                    *End,
 371     UINT64                  Number,
 372     UINT8                   Base,
 373     INT32                   Width,
 374     INT32                   Precision,
 375     UINT8                   Type)
 376 {
 377     char                    *Pos;
 378     char                    Sign;
 379     char                    Zero;
 380     BOOLEAN                 NeedPrefix;
 381     BOOLEAN                 Upper;
 382     INT32                   i;
 383     char                    ReversedString[66];
 384
 385
 386     /* Parameter validation */
 387
 388     if (Base < 2 || Base > 16)
 389     {
 390         return (NULL);
 391     }
 392
 393     if (Type & ACPI_FORMAT_LEFT)
 394     {
 395         Type &= ~ACPI_FORMAT_ZERO;
 396     }
 397
 398     NeedPrefix = ((Type & ACPI_FORMAT_PREFIX) && Base != 10) ? TRUE : FALSE;
 399     Upper = (Type & ACPI_FORMAT_UPPER) ? TRUE : FALSE;
 400     Zero = (Type & ACPI_FORMAT_ZERO) ? '0' : ' ';
 401
 402     /* Calculate size according to sign and prefix */
 403
 404     Sign = '\0';
 405     if (Type & ACPI_FORMAT_SIGN)
 406     {
 407         if ((INT64) Number < 0)
 408         {
 409             Sign = '-';
 410             Number = - (INT64) Number;
 411             Width--;
 412         }
 413         else if (Type & ACPI_FORMAT_SIGN_PLUS)
 414         {
 415             Sign = '+';
 416             Width--;
 417         }
 418         else if (Type & ACPI_FORMAT_SIGN_PLUS_SPACE)
 419         {
 420             Sign = ' ';
 421             Width--;
 422         }
 423     }
 424     if (NeedPrefix)
 425     {
 426         Width--;
 427         if (Base == 16)
 428         {
 429             Width--;
 430         }
 431     }
 432
 433     /* Generate full string in reverse order */
 434
 435     Pos = AcpiUtPutNumber (ReversedString, Number, Base, Upper);
 436     i = ACPI_PTR_DIFF (Pos, ReversedString);
 437
 438     /* Printing 100 using %2d gives "100", not "00" */
 439
 440     if (i > Precision)
 441     {
 442         Precision = i;
 443     }
 444
 445     Width -= Precision;
 446
 447     /* Output the string */
 448
 449     if (!(Type & (ACPI_FORMAT_ZERO | ACPI_FORMAT_LEFT)))
 450     {
 451         while (--Width >= 0)
 452         {
 453             String = AcpiUtBoundStringOutput (String, End, ' ');
 454         }
 455     }
 456     if (Sign)
 457     {
 458         String = AcpiUtBoundStringOutput (String, End, Sign);
 459     }
 460     if (NeedPrefix)
 461     {
 462         String = AcpiUtBoundStringOutput (String, End, '0');
 463         if (Base == 16)
 464         {
 465             String = AcpiUtBoundStringOutput (String, End,
 466                         Upper ? 'X' : 'x');
 467         }
 468     }
 469     if (!(Type & ACPI_FORMAT_LEFT))
 470     {
 471         while (--Width >= 0)
 472         {
 473             String = AcpiUtBoundStringOutput (String, End, Zero);
 474         }
 475     }
 476
 477     while (i <= --Precision)
 478     {
 479         String = AcpiUtBoundStringOutput (String, End, '0');
 480     }
 481     while (--i >= 0)
 482     {
 483         String = AcpiUtBoundStringOutput (String, End,
 484                     ReversedString[i]);
 485     }
 486     while (--Width >= 0)
 487     {
 488         String = AcpiUtBoundStringOutput (String, End, ' ');
 489     }
 490
 491     return (String);
 492 }
 493
 494
 495 /*******************************************************************************
 496  *
 497  * FUNCTION:    AcpiUtVsnprintf
 498  *
 499  * PARAMETERS:  String              - String with boundary
 500  *              Size                - Boundary of the string
 501  *              Format              - Standard printf format
 502  *              Args                - Argument list
 503  *
 504  * RETURN:      Number of bytes actually written.
 505  *
 506  * DESCRIPTION: Formatted output to a string using argument list pointer.
 507  *
 508  ******************************************************************************/
 509
 510 int
 511 AcpiUtVsnprintf (
 512     char                    *String,
 513     ACPI_SIZE               Size,
 514     const char              *Format,
 515     va_list                 Args)
 516 {
 517     UINT8                   Base = 10;
 518     UINT8                   Type = 0;
 519     INT32                   Width = -1;
 520     INT32                   Precision = -1;
 521     char                    Qualifier = 0;
 522     UINT64                  Number;
 523     char                    *Pos;
 524     char                    *End;
 525     char                    c;
 526     const char              *s;
 527     const void              *p;
 528     INT32                   Length;
 529     int                     i;
 530
 531
 532     Pos = String;
 533     End = String + Size;
 534
 535     for (; *Format; ++Format)
 536     {
 537         if (*Format != '%')
 538         {
 539             Pos = AcpiUtBoundStringOutput (Pos, End, *Format);
 540             continue;
 541         }
 542
 543         /* Process sign */
 544
 545         do
 546         {
 547             ++Format;
 548             if (*Format == '#')
 549             {
 550                 Type |= ACPI_FORMAT_PREFIX;
 551             }
 552             else if (*Format == '0')
 553             {
 554                 Type |= ACPI_FORMAT_ZERO;
 555             }
 556             else if (*Format == '+')
 557             {
 558                 Type |= ACPI_FORMAT_SIGN_PLUS;
 559             }
 560             else if (*Format == ' ')
 561             {
 562                 Type |= ACPI_FORMAT_SIGN_PLUS_SPACE;
 563             }
 564             else if (*Format == '-')
 565             {
 566                 Type |= ACPI_FORMAT_LEFT;
 567             }
 568             else
 569             {
 570                 break;
 571             }
 572         } while (1);
 573
 574         /* Process width */
 575
 576         Width = -1;
 577         if (ACPI_IS_DIGIT (*Format))
 578         {
 579             Format = AcpiUtScanNumber (Format, &Number);
 580             Width = (INT32) Number;
 581         }
 582         else if (*Format == '*')
 583         {
 584             ++Format;
 585             Width = va_arg (Args, int);
 586             if (Width < 0)
 587             {
 588                 Width = -Width;
 589                 Type |= ACPI_FORMAT_LEFT;
 590             }
 591         }
 592
 593         /* Process precision */
 594
 595         Precision = -1;
 596         if (*Format == '.')
 597         {
 598             ++Format;
 599             if (ACPI_IS_DIGIT(*Format))
 600             {
 601                 Format = AcpiUtScanNumber (Format, &Number);
 602                 Precision = (INT32) Number;
 603             }
 604             else if (*Format == '*')
 605             {
 606                 ++Format;
 607                 Precision = va_arg (Args, int);
 608             }
 609             if (Precision < 0)
 610             {
 611                 Precision = 0;
 612             }
 613         }
 614
 615         /* Process qualifier */
 616
 617         Qualifier = -1;
 618         if (*Format == 'h' || *Format == 'l' || *Format == 'L')
 619         {
 620             Qualifier = *Format;
 621             ++Format;
 622
 623             if (Qualifier == 'l' && *Format == 'l')
 624             {
 625                 Qualifier = 'L';
 626                 ++Format;
 627             }
 628         }
 629
 630         switch (*Format)
 631         {
 632         case '%':
 633
 634             Pos = AcpiUtBoundStringOutput (Pos, End, '%');
 635             continue;
 636
 637         case 'c':
 638
 639             if (!(Type & ACPI_FORMAT_LEFT))
 640             {
 641                 while (--Width > 0)
 642                 {
 643                     Pos = AcpiUtBoundStringOutput (Pos, End, ' ');
 644                 }
 645             }
 646
 647             c = (char) va_arg (Args, int);
 648             Pos = AcpiUtBoundStringOutput (Pos, End, c);
 649
 650             while (--Width > 0)
 651             {
 652                 Pos = AcpiUtBoundStringOutput (Pos, End, ' ');
 653             }
 654             continue;
 655
 656         case 's':
 657
 658             s = va_arg (Args, char *);
 659             if (!s)
 660             {
 661                 s = "<NULL>";
 662             }
 663             Length = AcpiUtBoundStringLength (s, Precision);
 664             if (!(Type & ACPI_FORMAT_LEFT))
 665             {
 666                 while (Length < Width--)
 667                 {
 668                     Pos = AcpiUtBoundStringOutput (Pos, End, ' ');
 669                 }
 670             }
 671             for (i = 0; i < Length; ++i)
 672             {
 673                 Pos = AcpiUtBoundStringOutput (Pos, End, *s);
 674                 ++s;
 675             }
 676             while (Length < Width--)
 677             {
 678                 Pos = AcpiUtBoundStringOutput (Pos, End, ' ');
 679             }
 680             continue;
 681
 682         case 'o':
 683
 684             Base = 8;
 685             break;
 686
 687         case 'X':
 688
 689             Type |= ACPI_FORMAT_UPPER;
 690
 691         case 'x':
 692
 693             Base = 16;
 694             break;
 695
 696         case 'd':
 697         case 'i':
 698
 699             Type |= ACPI_FORMAT_SIGN;
 700
 701         case 'u':
 702
 703             break;
 704
 705         case 'p':
 706
 707             if (Width == -1)
 708             {
 709                 Width = 2 * sizeof (void *);
 710                 Type |= ACPI_FORMAT_ZERO;
 711             }
 712
 713             p = va_arg (Args, void *);
 714             Pos = AcpiUtFormatNumber (Pos, End,
 715                     ACPI_TO_INTEGER (p), 16, Width, Precision, Type);
 716             continue;
 717
 718         default:
 719
 720             Pos = AcpiUtBoundStringOutput (Pos, End, '%');
 721             if (*Format)
 722             {
 723                 Pos = AcpiUtBoundStringOutput (Pos, End, *Format);
 724             }
 725             else
 726             {
 727                 --Format;
 728             }
 729             continue;
 730         }
 731
 732         if (Qualifier == 'L')
 733         {
 734             Number = va_arg (Args, UINT64);
 735             if (Type & ACPI_FORMAT_SIGN)
 736             {
 737                 Number = (INT64) Number;
 738             }
 739         }
 740         else if (Qualifier == 'l')
 741         {
 742             Number = va_arg (Args, unsigned long);
 743             if (Type & ACPI_FORMAT_SIGN)
 744             {
 745                 Number = (INT32) Number;
 746             }
 747         }
 748         else if (Qualifier == 'h')
 749         {
 750             Number = (UINT16) va_arg (Args, int);
 751             if (Type & ACPI_FORMAT_SIGN)
 752             {
 753                 Number = (INT16) Number;
 754             }
 755         }
 756         else
 757         {
 758             Number = va_arg (Args, unsigned int);
 759             if (Type & ACPI_FORMAT_SIGN)
 760             {
 761                 Number = (signed int) Number;
 762             }
 763         }
 764
 765         Pos = AcpiUtFormatNumber (Pos, End, Number, Base,
 766                 Width, Precision, Type);
 767     }
 768
 769     if (Size > 0)
 770     {
 771         if (Pos < End)
 772         {
 773             *Pos = '\0';
 774         }
 775         else
 776         {
 777             End[-1] = '\0';
 778         }
 779     }
 780
 781     return (ACPI_PTR_DIFF (Pos, String));
 782 }
 783
 784
 785 /*******************************************************************************
 786  *
 787  * FUNCTION:    AcpiUtSnprintf
 788  *
 789  * PARAMETERS:  String              - String with boundary
 790  *              Size                - Boundary of the string
 791  *              Format, ...         - Standard printf format
 792  *
 793  * RETURN:      Number of bytes actually written.
 794  *
 795  * DESCRIPTION: Formatted output to a string.
 796  *
 797  ******************************************************************************/
 798
 799 int
 800 AcpiUtSnprintf (
 801     char                    *String,
 802     ACPI_SIZE               Size,
 803     const char              *Format,
 804     ...)
 805 {
 806     va_list                 Args;
 807     int                     Length;
 808
 809
 810     va_start (Args, Format);
 811     Length = AcpiUtVsnprintf (String, Size, Format, Args);
 812     va_end (Args);
 813
 814     return (Length);
 815 }
 816
 817
 818 #ifdef ACPI_APPLICATION
 819 /*******************************************************************************
 820  *
 821  * FUNCTION:    AcpiUtFileVprintf
 822  *
 823  * PARAMETERS:  File                - File descriptor
 824  *              Format              - Standard printf format
 825  *              Args                - Argument list
 826  *
 827  * RETURN:      Number of bytes actually written.
 828  *
 829  * DESCRIPTION: Formatted output to a file using argument list pointer.
 830  *
 831  ******************************************************************************/
 832
 833 int
 834 AcpiUtFileVprintf (
 835     ACPI_FILE               File,
 836     const char              *Format,
 837     va_list                 Args)
 838 {
 839     ACPI_CPU_FLAGS          Flags;
 840     int                     Length;
 841
 842
 843     Flags = AcpiOsAcquireLock (AcpiGbl_PrintLock);
 844     Length = AcpiUtVsnprintf (AcpiGbl_PrintBuffer,
 845                 sizeof (AcpiGbl_PrintBuffer), Format, Args);
 846
 847     (void) AcpiOsWriteFile (File, AcpiGbl_PrintBuffer, Length, 1);
 848     AcpiOsReleaseLock (AcpiGbl_PrintLock, Flags);
 849
 850     return (Length);
 851 }
 852
 853
 854 /*******************************************************************************
 855  *
 856  * FUNCTION:    AcpiUtFilePrintf
 857  *
 858  * PARAMETERS:  File                - File descriptor
 859  *              Format, ...         - Standard printf format
 860  *
 861  * RETURN:      Number of bytes actually written.
 862  *
 863  * DESCRIPTION: Formatted output to a file.
 864  *
 865  ******************************************************************************/
 866
 867 int
 868 AcpiUtFilePrintf (
 869     ACPI_FILE               File,
 870     const char              *Format,
 871     ...)
 872 {
 873     va_list                 Args;
 874     int                     Length;
 875
 876
 877     va_start (Args, Format);
 878     Length = AcpiUtFileVprintf (File, Format, Args);
 879     va_end (Args);
 880
 881     return (Length);
 882 }
 883 #endif