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27629196 BM |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utnonansi - Non-ansi C library functions | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
c8100dc4 | 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
27629196 BM |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | ||
47 | #define _COMPONENT ACPI_UTILITIES | |
48 | ACPI_MODULE_NAME("utnonansi") | |
49 | ||
50 | /* | |
5ebd2eaa BM |
51 | * Non-ANSI C library functions - strlwr, strupr, stricmp, and "safe" |
52 | * string functions. | |
27629196 BM |
53 | */ |
54 | /******************************************************************************* | |
55 | * | |
56 | * FUNCTION: acpi_ut_strlwr (strlwr) | |
57 | * | |
58 | * PARAMETERS: src_string - The source string to convert | |
59 | * | |
60 | * RETURN: None | |
61 | * | |
62 | * DESCRIPTION: Convert a string to lowercase | |
63 | * | |
64 | ******************************************************************************/ | |
65 | void acpi_ut_strlwr(char *src_string) | |
66 | { | |
67 | char *string; | |
68 | ||
69 | ACPI_FUNCTION_ENTRY(); | |
70 | ||
71 | if (!src_string) { | |
72 | return; | |
73 | } | |
74 | ||
75 | /* Walk entire string, lowercasing the letters */ | |
76 | ||
77 | for (string = src_string; *string; string++) { | |
78 | *string = (char)tolower((int)*string); | |
79 | } | |
80 | } | |
81 | ||
82 | /******************************************************************************* | |
83 | * | |
84 | * FUNCTION: acpi_ut_strupr (strupr) | |
85 | * | |
86 | * PARAMETERS: src_string - The source string to convert | |
87 | * | |
88 | * RETURN: None | |
89 | * | |
90 | * DESCRIPTION: Convert a string to uppercase | |
91 | * | |
92 | ******************************************************************************/ | |
93 | ||
94 | void acpi_ut_strupr(char *src_string) | |
95 | { | |
96 | char *string; | |
97 | ||
98 | ACPI_FUNCTION_ENTRY(); | |
99 | ||
100 | if (!src_string) { | |
101 | return; | |
102 | } | |
103 | ||
104 | /* Walk entire string, uppercasing the letters */ | |
105 | ||
106 | for (string = src_string; *string; string++) { | |
107 | *string = (char)toupper((int)*string); | |
108 | } | |
109 | } | |
110 | ||
111 | /****************************************************************************** | |
112 | * | |
113 | * FUNCTION: acpi_ut_stricmp (stricmp) | |
114 | * | |
115 | * PARAMETERS: string1 - first string to compare | |
116 | * string2 - second string to compare | |
117 | * | |
118 | * RETURN: int that signifies string relationship. Zero means strings | |
119 | * are equal. | |
120 | * | |
121 | * DESCRIPTION: Case-insensitive string compare. Implementation of the | |
122 | * non-ANSI stricmp function. | |
123 | * | |
124 | ******************************************************************************/ | |
125 | ||
126 | int acpi_ut_stricmp(char *string1, char *string2) | |
127 | { | |
128 | int c1; | |
129 | int c2; | |
130 | ||
131 | do { | |
132 | c1 = tolower((int)*string1); | |
133 | c2 = tolower((int)*string2); | |
134 | ||
135 | string1++; | |
136 | string2++; | |
137 | } | |
138 | while ((c1 == c2) && (c1)); | |
139 | ||
140 | return (c1 - c2); | |
141 | } | |
142 | ||
50db3052 BM |
143 | #if defined (ACPI_DEBUGGER) || defined (ACPI_APPLICATION) |
144 | /******************************************************************************* | |
145 | * | |
146 | * FUNCTION: acpi_ut_safe_strcpy, acpi_ut_safe_strcat, acpi_ut_safe_strncat | |
147 | * | |
148 | * PARAMETERS: Adds a "DestSize" parameter to each of the standard string | |
149 | * functions. This is the size of the Destination buffer. | |
150 | * | |
151 | * RETURN: TRUE if the operation would overflow the destination buffer. | |
152 | * | |
153 | * DESCRIPTION: Safe versions of standard Clib string functions. Ensure that | |
154 | * the result of the operation will not overflow the output string | |
155 | * buffer. | |
156 | * | |
157 | * NOTE: These functions are typically only helpful for processing | |
158 | * user input and command lines. For most ACPICA code, the | |
159 | * required buffer length is precisely calculated before buffer | |
160 | * allocation, so the use of these functions is unnecessary. | |
161 | * | |
162 | ******************************************************************************/ | |
163 | ||
164 | u8 acpi_ut_safe_strcpy(char *dest, acpi_size dest_size, char *source) | |
165 | { | |
166 | ||
167 | if (strlen(source) >= dest_size) { | |
168 | return (TRUE); | |
169 | } | |
170 | ||
171 | strcpy(dest, source); | |
172 | return (FALSE); | |
173 | } | |
174 | ||
175 | u8 acpi_ut_safe_strcat(char *dest, acpi_size dest_size, char *source) | |
176 | { | |
177 | ||
178 | if ((strlen(dest) + strlen(source)) >= dest_size) { | |
179 | return (TRUE); | |
180 | } | |
181 | ||
182 | strcat(dest, source); | |
183 | return (FALSE); | |
184 | } | |
185 | ||
186 | u8 | |
187 | acpi_ut_safe_strncat(char *dest, | |
188 | acpi_size dest_size, | |
189 | char *source, acpi_size max_transfer_length) | |
190 | { | |
191 | acpi_size actual_transfer_length; | |
192 | ||
193 | actual_transfer_length = ACPI_MIN(max_transfer_length, strlen(source)); | |
194 | ||
195 | if ((strlen(dest) + actual_transfer_length) >= dest_size) { | |
196 | return (TRUE); | |
197 | } | |
198 | ||
199 | strncat(dest, source, max_transfer_length); | |
200 | return (FALSE); | |
201 | } | |
202 | #endif |