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 - 2023, 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
AcpiUtStrlwr(char * SrcString)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
AcpiUtStrupr(char * SrcString)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
AcpiUtStricmp(char * String1,char * String2)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
AcpiUtSafeStrcpy(char * Dest,ACPI_SIZE DestSize,char * Source)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
AcpiUtSafeStrcat(char * Dest,ACPI_SIZE DestSize,char * Source)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
AcpiUtSafeStrncat(char * Dest,ACPI_SIZE DestSize,char * Source,ACPI_SIZE MaxTransferLength)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
AcpiUtSafeStrncpy(char * Dest,char * Source,ACPI_SIZE DestSize)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
