| 1 | |
| 2 | |
| 3 | * Taken from:
|
| 4 | * linux/lib/string.c
|
| 5 | *
|
| 6 | * Copyright (C) 1991, 1992 Linus Torvalds
|
| 7 |
|
| 8 |
|
| 9 | #include <linux/ctype.h>
|
| 10 | #include <linux/kernel.h>
|
| 11 | #include <linux/types.h>
|
| 12 | #include <linux/string.h>
|
| 13 |
|
| 14 | #ifndef EFI_HAVE_STRLEN
|
| 15 | |
| 16 | * strlen - Find the length of a string
|
| 17 | * @s: The string to be sized
|
| 18 |
|
| 19 | size_t strlen(const char *s)
|
| 20 | {
|
| 21 | const char *sc;
|
| 22 |
|
| 23 | for (sc = s; *sc != '\0'; ++sc)
|
| 24 | ;
|
| 25 | return sc - s;
|
| 26 | }
|
| 27 | #endif
|
| 28 |
|
| 29 | #ifndef EFI_HAVE_STRNLEN
|
| 30 | |
| 31 | * strnlen - Find the length of a length-limited string
|
| 32 | * @s: The string to be sized
|
| 33 | * @count: The maximum number of bytes to search
|
| 34 |
|
| 35 | size_t strnlen(const char *s, size_t count)
|
| 36 | {
|
| 37 | const char *sc;
|
| 38 |
|
| 39 | for (sc = s; count-- && *sc != '\0'; ++sc)
|
| 40 | ;
|
| 41 | return sc - s;
|
| 42 | }
|
| 43 | #endif
|
| 44 |
|
| 45 | |
| 46 | * strstr - Find the first substring in a %NUL terminated string
|
| 47 | * @s1: The string to be searched
|
| 48 | * @s2: The string to search for
|
| 49 |
|
| 50 | char *strstr(const char *s1, const char *s2)
|
| 51 | {
|
| 52 | size_t l1, l2;
|
| 53 |
|
| 54 | l2 = strlen(s2);
|
| 55 | if (!l2)
|
| 56 | return (char *)s1;
|
| 57 | l1 = strlen(s1);
|
| 58 | while (l1 >= l2) {
|
| 59 | l1--;
|
| 60 | if (!memcmp(s1, s2, l2))
|
| 61 | return (char *)s1;
|
| 62 | s1++;
|
| 63 | }
|
| 64 | return NULL;
|
| 65 | }
|
| 66 |
|
| 67 | #ifndef EFI_HAVE_STRCMP
|
| 68 | |
| 69 | * strcmp - Compare two strings
|
| 70 | * @cs: One string
|
| 71 | * @ct: Another string
|
| 72 |
|
| 73 | int strcmp(const char *cs, const char *ct)
|
| 74 | {
|
| 75 | unsigned char c1, c2;
|
| 76 |
|
| 77 | while (1) {
|
| 78 | c1 = *cs++;
|
| 79 | c2 = *ct++;
|
| 80 | if (c1 != c2)
|
| 81 | return c1 < c2 ? -1 : 1;
|
| 82 | if (!c1)
|
| 83 | break;
|
| 84 | }
|
| 85 | return 0;
|
| 86 | }
|
| 87 | #endif
|
| 88 |
|
| 89 | |
| 90 | * strncmp - Compare two length-limited strings
|
| 91 | * @cs: One string
|
| 92 | * @ct: Another string
|
| 93 | * @count: The maximum number of bytes to compare
|
| 94 |
|
| 95 | int strncmp(const char *cs, const char *ct, size_t count)
|
| 96 | {
|
| 97 | unsigned char c1, c2;
|
| 98 |
|
| 99 | while (count) {
|
| 100 | c1 = *cs++;
|
| 101 | c2 = *ct++;
|
| 102 | if (c1 != c2)
|
| 103 | return c1 < c2 ? -1 : 1;
|
| 104 | if (!c1)
|
| 105 | break;
|
| 106 | count--;
|
| 107 | }
|
| 108 | return 0;
|
| 109 | }
|
| 110 |
|
| 111 |
|
| 112 | #define TOLOWER(x) ((x) | 0x20)
|
| 113 |
|
| 114 | static unsigned int simple_guess_base(const char *cp)
|
| 115 | {
|
| 116 | if (cp[0] == '0') {
|
| 117 | if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
|
| 118 | return 16;
|
| 119 | else
|
| 120 | return 8;
|
| 121 | } else {
|
| 122 | return 10;
|
| 123 | }
|
| 124 | }
|
| 125 |
|
| 126 | |
| 127 | * simple_strtoull - convert a string to an unsigned long long
|
| 128 | * @cp: The start of the string
|
| 129 | * @endp: A pointer to the end of the parsed string will be placed here
|
| 130 | * @base: The number base to use
|
| 131 |
|
| 132 |
|
| 133 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
|
| 134 | {
|
| 135 | unsigned long long result = 0;
|
| 136 |
|
| 137 | if (!base)
|
| 138 | base = simple_guess_base(cp);
|
| 139 |
|
| 140 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
|
| 141 | cp += 2;
|
| 142 |
|
| 143 | while (isxdigit(*cp)) {
|
| 144 | unsigned int value;
|
| 145 |
|
| 146 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
|
| 147 | if (value >= base)
|
| 148 | break;
|
| 149 | result = result * base + value;
|
| 150 | cp++;
|
| 151 | }
|
| 152 | if (endp)
|
| 153 | *endp = (char *)cp;
|
| 154 |
|
| 155 | return result;
|
| 156 | }
|
| 157 |
|
| 158 | long simple_strtol(const char *cp, char **endp, unsigned int base)
|
| 159 | {
|
| 160 | if (*cp == '-')
|
| 161 | return -simple_strtoull(cp + 1, endp, base);
|
| 162 |
|
| 163 | return simple_strtoull(cp, endp, base);
|
| 164 | }
|
| 165 |
|
| 166 | #ifdef CONFIG_EFI_PARAMS_FROM_FDT
|
| 167 | #ifndef EFI_HAVE_STRRCHR
|
| 168 | |
| 169 | * strrchr - Find the last occurrence of a character in a string
|
| 170 | * @s: The string to be searched
|
| 171 | * @c: The character to search for
|
| 172 |
|
| 173 | char *strrchr(const char *s, int c)
|
| 174 | {
|
| 175 | const char *last = NULL;
|
| 176 | do {
|
| 177 | if (*s == (char)c)
|
| 178 | last = s;
|
| 179 | } while (*s++);
|
| 180 | return (char *)last;
|
| 181 | }
|
| 182 | #endif
|
| 183 | #ifndef EFI_HAVE_MEMCHR
|
| 184 | |
| 185 | * memchr - Find a character in an area of memory.
|
| 186 | * @s: The memory area
|
| 187 | * @c: The byte to search for
|
| 188 | * @n: The size of the area.
|
| 189 | *
|
| 190 | * returns the address of the first occurrence of @c, or %NULL
|
| 191 | * if @c is not found
|
| 192 |
|
| 193 | void *memchr(const void *s, int c, size_t n)
|
| 194 | {
|
| 195 | const unsigned char *p = s;
|
| 196 | while (n-- != 0) {
|
| 197 | if ((unsigned char)c == *p++) {
|
| 198 | return (void *)(p - 1);
|
| 199 | }
|
| 200 | }
|
| 201 | return NULL;
|
| 202 | }
|
| 203 | #endif
|
| 204 | #endif
|