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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup generic |
29 | /** @addtogroup generic |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Miscellaneous functions. |
35 | * @brief Miscellaneous functions. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <string.h> |
38 | #include <string.h> |
39 | #include <print.h> |
39 | #include <print.h> |
40 | #include <cpu.h> |
40 | #include <cpu.h> |
41 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
42 | #include <arch.h> |
42 | #include <arch.h> |
43 | #include <console/kconsole.h> |
43 | #include <console/kconsole.h> |
44 | 44 | ||
45 | /** Return number of characters in a string. |
45 | /** Return number of characters in a string. |
46 | * |
46 | * |
47 | * @param str NULL terminated string. |
47 | * @param str NULL terminated string. |
48 | * |
48 | * |
49 | * @return Number of characters in str. |
49 | * @return Number of characters in str. |
50 | */ |
50 | */ |
51 | size_t strlen(const char *str) |
51 | size_t strlen(const char *str) |
52 | { |
52 | { |
53 | int i; |
53 | int i; |
54 | 54 | ||
55 | for (i = 0; str[i]; i++) |
55 | for (i = 0; str[i]; i++) |
56 | ; |
56 | ; |
57 | 57 | ||
58 | return i; |
58 | return i; |
59 | } |
59 | } |
60 | 60 | ||
61 | /** Compare two NULL terminated strings |
61 | /** Compare two NULL terminated strings |
62 | * |
62 | * |
63 | * Do a char-by-char comparison of two NULL terminated strings. |
63 | * Do a char-by-char comparison of two NULL terminated strings. |
64 | * The strings are considered equal iff they consist of the same |
64 | * The strings are considered equal iff they consist of the same |
65 | * characters on the minimum of their lengths. |
65 | * characters on the minimum of their lengths. |
66 | * |
66 | * |
67 | * @param src First string to compare. |
67 | * @param src First string to compare. |
68 | * @param dst Second string to compare. |
68 | * @param dst Second string to compare. |
69 | * |
69 | * |
70 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
70 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
71 | * |
71 | * |
72 | */ |
72 | */ |
73 | int strcmp(const char *src, const char *dst) |
73 | int strcmp(const char *src, const char *dst) |
74 | { |
74 | { |
75 | for (; *src && *dst; src++, dst++) { |
75 | for (; *src && *dst; src++, dst++) { |
76 | if (*src < *dst) |
76 | if (*src < *dst) |
77 | return -1; |
77 | return -1; |
78 | if (*src > *dst) |
78 | if (*src > *dst) |
79 | return 1; |
79 | return 1; |
80 | } |
80 | } |
81 | if (*src == *dst) |
81 | if (*src == *dst) |
82 | return 0; |
82 | return 0; |
83 | if (!*src) |
83 | if (!*src) |
84 | return -1; |
84 | return -1; |
85 | return 1; |
85 | return 1; |
86 | } |
86 | } |
87 | 87 | ||
88 | 88 | ||
89 | /** Compare two NULL terminated strings |
89 | /** Compare two NULL terminated strings |
90 | * |
90 | * |
91 | * Do a char-by-char comparison of two NULL terminated strings. |
91 | * Do a char-by-char comparison of two NULL terminated strings. |
92 | * The strings are considered equal iff they consist of the same |
92 | * The strings are considered equal iff they consist of the same |
93 | * characters on the minimum of their lengths and specified maximal |
93 | * characters on the minimum of their lengths and specified maximal |
94 | * length. |
94 | * length. |
95 | * |
95 | * |
96 | * @param src First string to compare. |
96 | * @param src First string to compare. |
97 | * @param dst Second string to compare. |
97 | * @param dst Second string to compare. |
98 | * @param len Maximal length for comparison. |
98 | * @param len Maximal length for comparison. |
99 | * |
99 | * |
100 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
100 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
101 | * |
101 | * |
102 | */ |
102 | */ |
103 | int strncmp(const char *src, const char *dst, size_t len) |
103 | int strncmp(const char *src, const char *dst, size_t len) |
104 | { |
104 | { |
105 | unsigned int i; |
105 | unsigned int i; |
106 | 106 | ||
107 | for (i = 0; (*src) && (*dst) && (i < len); src++, dst++, i++) { |
107 | for (i = 0; (*src) && (*dst) && (i < len); src++, dst++, i++) { |
108 | if (*src < *dst) |
108 | if (*src < *dst) |
109 | return -1; |
109 | return -1; |
110 | if (*src > *dst) |
110 | if (*src > *dst) |
111 | return 1; |
111 | return 1; |
112 | } |
112 | } |
113 | if (i == len || *src == *dst) |
113 | if (i == len || *src == *dst) |
114 | return 0; |
114 | return 0; |
115 | if (!*src) |
115 | if (!*src) |
116 | return -1; |
116 | return -1; |
117 | return 1; |
117 | return 1; |
118 | } |
118 | } |
119 | 119 | ||
120 | 120 | ||
121 | 121 | ||
122 | /** Copy NULL terminated string. |
122 | /** Copy NULL terminated string. |
123 | * |
123 | * |
124 | * Copy at most 'len' characters from string 'src' to 'dest'. |
124 | * Copy at most 'len' characters from string 'src' to 'dest'. |
125 | * If 'src' is shorter than 'len', '\0' is inserted behind the |
125 | * If 'src' is shorter than 'len', '\0' is inserted behind the |
126 | * last copied character. |
126 | * last copied character. |
127 | * |
127 | * |
128 | * @param src Source string. |
128 | * @param src Source string. |
129 | * @param dest Destination buffer. |
129 | * @param dest Destination buffer. |
130 | * @param len Size of destination buffer. |
130 | * @param len Size of destination buffer. |
131 | */ |
131 | */ |
132 | void strncpy(char *dest, const char *src, size_t len) |
132 | void strncpy(char *dest, const char *src, size_t len) |
133 | { |
133 | { |
134 | unsigned int i; |
134 | unsigned int i; |
135 | 135 | ||
136 | for (i = 0; i < len; i++) { |
136 | for (i = 0; i < len; i++) { |
137 | if (!(dest[i] = src[i])) |
137 | if (!(dest[i] = src[i])) |
138 | return; |
138 | return; |
139 | } |
139 | } |
140 | 140 | ||
141 | dest[i - 1] = '\0'; |
141 | dest[i - 1] = '\0'; |
142 | } |
142 | } |
143 | 143 | ||
144 | /** Copy string. |
144 | /** Copy string. |
145 | * |
145 | * |
146 | * Copy string from src address to dst address. The copying is done |
146 | * Copy string from src address to dst address. The copying is done |
147 | * char-by-char until the null character. The source and destination memory |
147 | * char-by-char until the null character. The source and destination memory |
148 | * areas cannot overlap. |
148 | * areas cannot overlap. |
149 | * |
149 | * |
150 | * @param src Source string to copy from. |
150 | * @param src Source string to copy from. |
151 | * @param dst Destination string to copy to. |
151 | * @param dst Destination string to copy to. |
152 | * |
152 | * |
153 | * @return Address of the destination string. |
153 | * @return Address of the destination string. |
154 | */ |
154 | */ |
155 | char *strcpy(char *dest, const char *src) |
155 | char *strcpy(char *dest, const char *src) |
156 | { |
156 | { |
157 | char *orig = dest; |
157 | char *orig = dest; |
158 | 158 | ||
159 | while ((*dest++ = *src++) != '\0'); |
159 | while ((*dest++ = *src++) != '\0'); |
160 | 160 | ||
161 | return orig; |
161 | return orig; |
162 | } |
162 | } |
163 | 163 | ||
- | 164 | /** Find first occurence of character in string. |
|
- | 165 | * |
|
- | 166 | * @param s String to search. |
|
- | 167 | * @param i Character to look for. |
|
- | 168 | * |
|
- | 169 | * @return Pointer to character in @a s or NULL if not found. |
|
- | 170 | */ |
|
- | 171 | extern char *strchr(const char *s, int i) |
|
- | 172 | { |
|
- | 173 | while (*s != '\0') { |
|
- | 174 | if (*s == i) return (char *) s; |
|
- | 175 | ++s; |
|
- | 176 | } |
|
- | 177 | ||
- | 178 | return NULL; |
|
- | 179 | } |
|
- | 180 | ||
- | 181 | /** Find last occurence of character in string. |
|
- | 182 | * |
|
- | 183 | * @param s String to search. |
|
- | 184 | * @param i Character to look for. |
|
- | 185 | * |
|
- | 186 | * @return Pointer to character in @a s or NULL if not found. |
|
- | 187 | */ |
|
- | 188 | extern char *strrchr(const char *s, int i) |
|
- | 189 | { |
|
- | 190 | const char *start; |
|
- | 191 | ||
- | 192 | start = s; |
|
- | 193 | if (*s == '\0') return NULL; |
|
- | 194 | ||
- | 195 | while (*s != '\0') ++s; |
|
- | 196 | ||
- | 197 | while (s != start) { |
|
- | 198 | --s; |
|
- | 199 | if (*s == i) return (char *) s; |
|
- | 200 | } |
|
- | 201 | ||
- | 202 | return NULL; |
|
- | 203 | } |
|
- | 204 | ||
164 | /** @} |
205 | /** @} |
165 | */ |
206 | */ |
166 | 207 |