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 - 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 "acpi.h" 153 #include "accommon.h" 154 155 156 #define _COMPONENT ACPI_UTILITIES 157 ACPI_MODULE_NAME ("utnonansi") 158 159 /* 160 * Non-ANSI C library functions - strlwr, strupr, stricmp, and "safe" 161 * string functions. 162 */ 163 164 /******************************************************************************* 165 * 166 * FUNCTION: AcpiUtStrlwr (strlwr) 167 * 168 * PARAMETERS: SrcString - The source string to convert 169 * 170 * RETURN: None 171 * 172 * DESCRIPTION: Convert a string to lowercase 173 * 174 ******************************************************************************/ 175 176 void 177 AcpiUtStrlwr ( 178 char *SrcString) 179 { 180 char *String; 181 182 183 ACPI_FUNCTION_ENTRY (); 184 185 186 if (!SrcString) 187 { 188 return; 189 } 190 191 /* Walk entire string, lowercasing the letters */ 192 193 for (String = SrcString; *String; String++) 194 { 195 *String = (char) tolower ((int) *String); 196 } 197 } 198 199 200 /******************************************************************************* 201 * 202 * FUNCTION: AcpiUtStrupr (strupr) 203 * 204 * PARAMETERS: SrcString - The source string to convert 205 * 206 * RETURN: None 207 * 208 * DESCRIPTION: Convert a string to uppercase 209 * 210 ******************************************************************************/ 211 212 void 213 AcpiUtStrupr ( 214 char *SrcString) 215 { 216 char *String; 217 218 219 ACPI_FUNCTION_ENTRY (); 220 221 222 if (!SrcString) 223 { 224 return; 225 } 226 227 /* Walk entire string, uppercasing the letters */ 228 229 for (String = SrcString; *String; String++) 230 { 231 *String = (char) toupper ((int) *String); 232 } 233 } 234 235 236 /****************************************************************************** 237 * 238 * FUNCTION: AcpiUtStricmp (stricmp) 239 * 240 * PARAMETERS: String1 - first string to compare 241 * String2 - second string to compare 242 * 243 * RETURN: int that signifies string relationship. Zero means strings 244 * are equal. 245 * 246 * DESCRIPTION: Case-insensitive string compare. Implementation of the 247 * non-ANSI stricmp function. 248 * 249 ******************************************************************************/ 250 251 int 252 AcpiUtStricmp ( 253 char *String1, 254 char *String2) 255 { 256 int c1; 257 int c2; 258 259 260 do 261 { 262 c1 = tolower ((int) *String1); 263 c2 = tolower ((int) *String2); 264 265 String1++; 266 String2++; 267 } 268 while ((c1 == c2) && (c1)); 269 270 return (c1 - c2); 271 } 272 273 274 #if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION) || defined (ACPI_DEBUG_OUTPUT) 275 /******************************************************************************* 276 * 277 * FUNCTION: AcpiUtSafeStrcpy, AcpiUtSafeStrcat, AcpiUtSafeStrncat 278 * 279 * PARAMETERS: Adds a "DestSize" parameter to each of the standard string 280 * functions. This is the size of the Destination buffer. 281 * 282 * RETURN: TRUE if the operation would overflow the destination buffer. 283 * 284 * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that 285 * the result of the operation will not overflow the output string 286 * buffer. 287 * 288 * NOTE: These functions are typically only helpful for processing 289 * user input and command lines. For most ACPICA code, the 290 * required buffer length is precisely calculated before buffer 291 * allocation, so the use of these functions is unnecessary. 292 * 293 ******************************************************************************/ 294 295 BOOLEAN 296 AcpiUtSafeStrcpy ( 297 char *Dest, 298 ACPI_SIZE DestSize, 299 char *Source) 300 { 301 302 if (strlen (Source) >= DestSize) 303 { 304 return (TRUE); 305 } 306 307 strcpy (Dest, Source); 308 return (FALSE); 309 } 310 311 BOOLEAN 312 AcpiUtSafeStrcat ( 313 char *Dest, 314 ACPI_SIZE DestSize, 315 char *Source) 316 { 317 318 if ((strlen (Dest) + strlen (Source)) >= DestSize) 319 { 320 return (TRUE); 321 } 322 323 strcat (Dest, Source); 324 return (FALSE); 325 } 326 327 BOOLEAN 328 AcpiUtSafeStrncat ( 329 char *Dest, 330 ACPI_SIZE DestSize, 331 char *Source, 332 ACPI_SIZE MaxTransferLength) 333 { 334 ACPI_SIZE ActualTransferLength; 335 336 337 ActualTransferLength = ACPI_MIN (MaxTransferLength, strlen (Source)); 338 339 if ((strlen (Dest) + ActualTransferLength) >= DestSize) 340 { 341 return (TRUE); 342 } 343 344 strncat (Dest, Source, MaxTransferLength); 345 return (FALSE); 346 } 347 348 void 349 AcpiUtSafeStrncpy ( 350 char *Dest, 351 char *Source, 352 ACPI_SIZE DestSize) 353 { 354 /* Always terminate destination string */ 355 356 strncpy (Dest, Source, DestSize); 357 Dest[DestSize - 1] = 0; 358 } 359 360 #endif 361