1 /******************************************************************************* 2 * 3 * Module Name: utnonansi - Non-ansi C library functions 4 * 5 ******************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, 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" 118 119 120 #define _COMPONENT ACPI_UTILITIES 121 ACPI_MODULE_NAME ("utnonansi") 122 123 124 /* 125 * Non-ANSI C library functions - strlwr, strupr, stricmp, and a 64-bit 126 * version of strtoul. 127 */ 128 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiUtStrlwr (strlwr) 132 * 133 * PARAMETERS: SrcString - The source string to convert 134 * 135 * RETURN: None 136 * 137 * DESCRIPTION: Convert a string to lowercase 138 * 139 ******************************************************************************/ 140 141 void 142 AcpiUtStrlwr ( 143 char *SrcString) 144 { 145 char *String; 146 147 148 ACPI_FUNCTION_ENTRY (); 149 150 151 if (!SrcString) 152 { 153 return; 154 } 155 156 /* Walk entire string, lowercasing the letters */ 157 158 for (String = SrcString; *String; String++) 159 { 160 *String = (char) tolower ((int) *String); 161 } 162 } 163 164 165 /******************************************************************************* 166 * 167 * FUNCTION: AcpiUtStrupr (strupr) 168 * 169 * PARAMETERS: SrcString - The source string to convert 170 * 171 * RETURN: None 172 * 173 * DESCRIPTION: Convert a string to uppercase 174 * 175 ******************************************************************************/ 176 177 void 178 AcpiUtStrupr ( 179 char *SrcString) 180 { 181 char *String; 182 183 184 ACPI_FUNCTION_ENTRY (); 185 186 187 if (!SrcString) 188 { 189 return; 190 } 191 192 /* Walk entire string, uppercasing the letters */ 193 194 for (String = SrcString; *String; String++) 195 { 196 *String = (char) toupper ((int) *String); 197 } 198 } 199 200 201 /****************************************************************************** 202 * 203 * FUNCTION: AcpiUtStricmp (stricmp) 204 * 205 * PARAMETERS: String1 - first string to compare 206 * String2 - second string to compare 207 * 208 * RETURN: int that signifies string relationship. Zero means strings 209 * are equal. 210 * 211 * DESCRIPTION: Case-insensitive string compare. Implementation of the 212 * non-ANSI stricmp function. 213 * 214 ******************************************************************************/ 215 216 int 217 AcpiUtStricmp ( 218 char *String1, 219 char *String2) 220 { 221 int c1; 222 int c2; 223 224 225 do 226 { 227 c1 = tolower ((int) *String1); 228 c2 = tolower ((int) *String2); 229 230 String1++; 231 String2++; 232 } 233 while ((c1 == c2) && (c1)); 234 235 return (c1 - c2); 236 } 237 238 239 /******************************************************************************* 240 * 241 * FUNCTION: AcpiUtStrtoul64 242 * 243 * PARAMETERS: String - Null terminated string 244 * Base - Radix of the string: 16 or ACPI_ANY_BASE; 245 * ACPI_ANY_BASE means 'in behalf of ToInteger' 246 * RetInteger - Where the converted integer is returned 247 * 248 * RETURN: Status and Converted value 249 * 250 * DESCRIPTION: Convert a string into an unsigned value. Performs either a 251 * 32-bit or 64-bit conversion, depending on the current mode 252 * of the interpreter. 253 * 254 * NOTE: Does not support Octal strings, not needed. 255 * 256 ******************************************************************************/ 257 258 ACPI_STATUS 259 AcpiUtStrtoul64 ( 260 char *String, 261 UINT32 Base, 262 UINT64 *RetInteger) 263 { 264 UINT32 ThisDigit = 0; 265 UINT64 ReturnValue = 0; 266 UINT64 Quotient; 267 UINT64 Dividend; 268 UINT32 ToIntegerOp = (Base == ACPI_ANY_BASE); 269 UINT32 Mode32 = (AcpiGbl_IntegerByteWidth == 4); 270 UINT8 ValidDigits = 0; 271 UINT8 SignOf0x = 0; 272 UINT8 Term = 0; 273 274 275 ACPI_FUNCTION_TRACE_STR (UtStroul64, String); 276 277 278 switch (Base) 279 { 280 case ACPI_ANY_BASE: 281 case 16: 282 283 break; 284 285 default: 286 287 /* Invalid Base */ 288 289 return_ACPI_STATUS (AE_BAD_PARAMETER); 290 } 291 292 if (!String) 293 { 294 goto ErrorExit; 295 } 296 297 /* Skip over any white space in the buffer */ 298 299 while ((*String) && (isspace ((int) *String) || *String == '\t')) 300 { 301 String++; 302 } 303 304 if (ToIntegerOp) 305 { 306 /* 307 * Base equal to ACPI_ANY_BASE means 'ToInteger operation case'. 308 * We need to determine if it is decimal or hexadecimal. 309 */ 310 if ((*String == '0') && (tolower ((int) *(String + 1)) == 'x')) 311 { 312 SignOf0x = 1; 313 Base = 16; 314 315 /* Skip over the leading '0x' */ 316 String += 2; 317 } 318 else 319 { 320 Base = 10; 321 } 322 } 323 324 /* Any string left? Check that '0x' is not followed by white space. */ 325 326 if (!(*String) || isspace ((int) *String) || *String == '\t') 327 { 328 if (ToIntegerOp) 329 { 330 goto ErrorExit; 331 } 332 else 333 { 334 goto AllDone; 335 } 336 } 337 338 /* 339 * Perform a 32-bit or 64-bit conversion, depending upon the current 340 * execution mode of the interpreter 341 */ 342 Dividend = (Mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX; 343 344 /* Main loop: convert the string to a 32- or 64-bit integer */ 345 346 while (*String) 347 { 348 if (isdigit ((int) *String)) 349 { 350 /* Convert ASCII 0-9 to Decimal value */ 351 352 ThisDigit = ((UINT8) *String) - '0'; 353 } 354 else if (Base == 10) 355 { 356 /* Digit is out of range; possible in ToInteger case only */ 357 358 Term = 1; 359 } 360 else 361 { 362 ThisDigit = (UINT8) toupper ((int) *String); 363 if (isxdigit ((int) ThisDigit)) 364 { 365 /* Convert ASCII Hex char to value */ 366 367 ThisDigit = ThisDigit - 'A' + 10; 368 } 369 else 370 { 371 Term = 1; 372 } 373 } 374 375 if (Term) 376 { 377 if (ToIntegerOp) 378 { 379 goto ErrorExit; 380 } 381 else 382 { 383 break; 384 } 385 } 386 else if ((ValidDigits == 0) && (ThisDigit == 0) && !SignOf0x) 387 { 388 /* Skip zeros */ 389 String++; 390 continue; 391 } 392 393 ValidDigits++; 394 395 if (SignOf0x && ((ValidDigits > 16) || ((ValidDigits > 8) && Mode32))) 396 { 397 /* 398 * This is ToInteger operation case. 399 * No any restrictions for string-to-integer conversion, 400 * see ACPI spec. 401 */ 402 goto ErrorExit; 403 } 404 405 /* Divide the digit into the correct position */ 406 407 (void) AcpiUtShortDivide ( 408 (Dividend - (UINT64) ThisDigit), Base, &Quotient, NULL); 409 410 if (ReturnValue > Quotient) 411 { 412 if (ToIntegerOp) 413 { 414 goto ErrorExit; 415 } 416 else 417 { 418 break; 419 } 420 } 421 422 ReturnValue *= Base; 423 ReturnValue += ThisDigit; 424 String++; 425 } 426 427 /* All done, normal exit */ 428 429 AllDone: 430 431 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 432 ACPI_FORMAT_UINT64 (ReturnValue))); 433 434 *RetInteger = ReturnValue; 435 return_ACPI_STATUS (AE_OK); 436 437 438 ErrorExit: 439 /* Base was set/validated above */ 440 441 if (Base == 10) 442 { 443 return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT); 444 } 445 else 446 { 447 return_ACPI_STATUS (AE_BAD_HEX_CONSTANT); 448 } 449 } 450 451 452 #if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION) 453 /******************************************************************************* 454 * 455 * FUNCTION: AcpiUtSafeStrcpy, AcpiUtSafeStrcat, AcpiUtSafeStrncat 456 * 457 * PARAMETERS: Adds a "DestSize" parameter to each of the standard string 458 * functions. This is the size of the Destination buffer. 459 * 460 * RETURN: TRUE if the operation would overflow the destination buffer. 461 * 462 * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that 463 * the result of the operation will not overflow the output string 464 * buffer. 465 * 466 * NOTE: These functions are typically only helpful for processing 467 * user input and command lines. For most ACPICA code, the 468 * required buffer length is precisely calculated before buffer 469 * allocation, so the use of these functions is unnecessary. 470 * 471 ******************************************************************************/ 472 473 BOOLEAN 474 AcpiUtSafeStrcpy ( 475 char *Dest, 476 ACPI_SIZE DestSize, 477 char *Source) 478 { 479 480 if (strlen (Source) >= DestSize) 481 { 482 return (TRUE); 483 } 484 485 strcpy (Dest, Source); 486 return (FALSE); 487 } 488 489 BOOLEAN 490 AcpiUtSafeStrcat ( 491 char *Dest, 492 ACPI_SIZE DestSize, 493 char *Source) 494 { 495 496 if ((strlen (Dest) + strlen (Source)) >= DestSize) 497 { 498 return (TRUE); 499 } 500 501 strcat (Dest, Source); 502 return (FALSE); 503 } 504 505 BOOLEAN 506 AcpiUtSafeStrncat ( 507 char *Dest, 508 ACPI_SIZE DestSize, 509 char *Source, 510 ACPI_SIZE MaxTransferLength) 511 { 512 ACPI_SIZE ActualTransferLength; 513 514 515 ActualTransferLength = ACPI_MIN (MaxTransferLength, strlen (Source)); 516 517 if ((strlen (Dest) + ActualTransferLength) >= DestSize) 518 { 519 return (TRUE); 520 } 521 522 strncat (Dest, Source, MaxTransferLength); 523 return (FALSE); 524 } 525 #endif 526