| 1 | #include <stddef.h> |
| 2 | #include <stdint.h> |
| 3 | #include <lib/libc.h> |
| 4 | #include <stdbool.h> |
| 5 | #include <lib/misc.h> |
| 6 | |
| 7 | bool isprint(int c) { |
| 8 | return c >= ' ' && c <= '~'; |
| 9 | } |
| 10 | |
| 11 | bool isspace(int c) { |
| 12 | return (c >= '\t' && c <= 0xD) || c == ' '; |
| 13 | } |
| 14 | |
| 15 | bool isalpha(int c) { |
| 16 | return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'); |
| 17 | } |
| 18 | |
| 19 | bool isdigit(int c) { |
| 20 | return c >= '0' && c <= '9'; |
| 21 | } |
| 22 | |
| 23 | int toupper(int c) { |
| 24 | if (c >= 'a' && c <= 'z') { |
| 25 | return c - 0x20; |
| 26 | } |
| 27 | return c; |
| 28 | } |
| 29 | |
| 30 | int tolower(int c) { |
| 31 | if (c >= 'A' && c <= 'Z') { |
| 32 | return c + 0x20; |
| 33 | } |
| 34 | return c; |
| 35 | } |
| 36 | |
| 37 | int abs(int i) { |
| 38 | return i < 0 ? -i : i; |
| 39 | } |
| 40 | |
| 41 | char *strcpy(char *dest, const char *src) { |
| 42 | size_t i; |
| 43 | |
| 44 | for (i = 0; src[i]; i++) |
| 45 | dest[i] = src[i]; |
| 46 | |
| 47 | dest[i] = 0; |
| 48 | |
| 49 | return dest; |
| 50 | } |
| 51 | |
| 52 | char *strncpy(char *dest, const char *src, size_t n) { |
| 53 | size_t i; |
| 54 | |
| 55 | for (i = 0; i < n && src[i]; i++) |
| 56 | dest[i] = src[i]; |
| 57 | for ( ; i < n; i++) |
| 58 | dest[i] = 0; |
| 59 | |
| 60 | return dest; |
| 61 | } |
| 62 | |
| 63 | int strcmp(const char *s1, const char *s2) { |
| 64 | for (size_t i = 0; ; i++) { |
| 65 | unsigned char c1 = ((unsigned char *)s1)[i], c2 = ((unsigned char *)s2)[i]; |
| 66 | if (c1 != c2) { |
| 67 | return c1 < c2 ? -1 : 1; |
| 68 | } |
| 69 | if (c1 == 0) { |
| 70 | return 0; |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | int strcasecmp(const char *s1, const char *s2) { |
| 76 | for (size_t i = 0; ; i++) { |
| 77 | unsigned char c1 = ((unsigned char *)s1)[i], c2 = ((unsigned char *)s2)[i]; |
| 78 | if (tolower(c1) != tolower(c2)) { |
| 79 | return c1 < c2 ? -1 : 1; |
| 80 | } |
| 81 | if (c1 == 0) { |
| 82 | return 0; |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | int strncmp(const char *s1, const char *s2, size_t n) { |
| 88 | for (size_t i = 0; i < n; i++) { |
| 89 | unsigned char c1 = ((unsigned char *)s1)[i], c2 = ((unsigned char *)s2)[i]; |
| 90 | if (c1 != c2) { |
| 91 | return c1 < c2 ? -1 : 1; |
| 92 | } |
| 93 | if (c1 == 0) { |
| 94 | return 0; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | int strncasecmp(const char *s1, const char *s2, size_t n) { |
| 102 | for (size_t i = 0; i < n; i++) { |
| 103 | unsigned char c1 = ((unsigned char *)s1)[i], c2 = ((unsigned char *)s2)[i]; |
| 104 | if (tolower(c1) != tolower(c2)) { |
| 105 | return c1 < c2 ? -1 : 1; |
| 106 | } |
| 107 | if (c1 == 0) { |
| 108 | return 0; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | size_t strlen(const char *str) { |
| 116 | size_t len; |
| 117 | |
| 118 | for (len = 0; str[len]; len++); |
| 119 | |
| 120 | return len; |
| 121 | } |
| 122 | |
| 123 | int inet_pton(const char *src, void *dst) { |
| 124 | uint8_t array[4]; |
| 125 | const char *current = src; |
| 126 | |
| 127 | for (int i = 0; i < 4; i++) { |
| 128 | const char *newcur; |
| 129 | uint64_t value = strtoui(current, &newcur, 10); |
| 130 | if (current == newcur) |
| 131 | return -1; |
| 132 | current = newcur; |
| 133 | if (i < 3) { |
| 134 | // Expect '.' delimiter between octets |
| 135 | if (*current != '.') |
| 136 | return -1; |
| 137 | current++; |
| 138 | } else { |
| 139 | // After last octet, string must end |
| 140 | if (*current != 0) |
| 141 | return -1; |
| 142 | } |
| 143 | if (value > 255) |
| 144 | return -1; |
| 145 | array[i] = value; |
| 146 | } |
| 147 | memcpy(dst, array, 4); |
| 148 | return 0; |
| 149 | } |
