diff options
author | dzwdz | 2023-08-14 18:51:07 +0200 |
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committer | dzwdz | 2023-08-14 18:51:07 +0200 |
commit | 642b5fb0007b64c77d186fcb018d571152ee1d47 (patch) | |
tree | 1c466461f3602d306be309a053edae558ef2568e /src/user/lib/string | |
parent | 8050069c57b729c18c19b1a03ab6e4bf63b4735e (diff) |
reorganization: first steps
Diffstat (limited to 'src/user/lib/string')
-rw-r--r-- | src/user/lib/string/strerror.c | 13 | ||||
-rw-r--r-- | src/user/lib/string/string.c | 122 |
2 files changed, 0 insertions, 135 deletions
diff --git a/src/user/lib/string/strerror.c b/src/user/lib/string/strerror.c deleted file mode 100644 index c838299..0000000 --- a/src/user/lib/string/strerror.c +++ /dev/null @@ -1,13 +0,0 @@ -#include <string.h> - -static const char *errstr[] = { -# define E(n, str) [n] = str, -# include <__errno.h> -# undef E -}; - -char *strerror(int n) { - if (0 <= n && n * sizeof(*errstr) < sizeof(errstr) && errstr[n]) - return (char*)errstr[n]; - return "unknown error"; -} diff --git a/src/user/lib/string/string.c b/src/user/lib/string/string.c deleted file mode 100644 index c65d7c5..0000000 --- a/src/user/lib/string/string.c +++ /dev/null @@ -1,122 +0,0 @@ -#include <ctype.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <strings.h> - -char *strchr(const char *s, int c) { - for (; *s || c == 0; s++) { - if (*s == c) return (char *)s; - } - return NULL; -} - -char *strrchr(const char *s, int c) { - for (int i = strlen(s) + 1; i >= 0; i--) { - if (s[i] == c) return (char *)s + i; - } - return NULL; -} - -size_t strspn(const char *s, const char *accept) { - size_t l = 0; - for (; s[l] && strchr(accept, s[l]); l++); - return l; -} - -size_t strcspn(const char *s, const char *reject) { - size_t l = 0; - for (; s[l] && !strchr(reject, s[l]); l++); - return l; -} - -char *strpbrk(const char *s1, const char *s2) { - for (; *s1; s1++) { - if (strchr(s2, *s1)) return (char*)s1; - } - return NULL; -} - -char *strtok(char *restrict s, const char *restrict sep) { - static char *state; - return strtok_r(s, sep, &state); -} - -char *strtok_r(char *restrict s, const char *restrict sep, char **restrict state) { - char *end; - if (!s) s = *state; - s += strspn(s, sep); /* beginning of token */ - if (!*s) return NULL; - - end = s + strcspn(s, sep); - if (*end) { - *end = '\0'; - *state = end + 1; - } else { - *state = end; - } - return s; -} - -int strncmp(const char *s1, const char *s2, size_t n) { - for (size_t i = 0; i < n; i++) { - if (s1[i] < s2[i]) return -1; - if (s1[i] > s2[i]) return 1; - } - return 0; -} - -int strcoll(const char *s1, const char *s2) { - return strcmp(s1, s2); -} - -// TODO implement strstr using Boyer-Moore -char *strstr(const char *s1, const char *s2) { - size_t l1 = strlen(s1), l2 = strlen(s2); - for (; l2 <= l1; s1++, l1--) { - if (memcmp(s1, s2, l2) == 0) return (char*)s1; - } - return NULL; -} - -char *strcpy(char *restrict s1, const char *restrict s2) { - while (*s2) *s1++ = *s2++; - *s1 = *s2; - return s1; -} - -char *strncpy(char *restrict dst, const char *restrict src, size_t n) { - for (size_t i = 0; i < n; i++) { - dst[i] = src[i]; - if (dst[i] == '\0') return dst + i; // TODO fill with null bytes - } - return dst; -} - -char *stpncpy(char *restrict dst, const char *restrict src, size_t n) { - return stpncpy(dst, src, n) + n; -} - -char *strdup(const char *s) { - size_t len = strlen(s) + 1; - char *buf = malloc(len); - if (buf) memcpy(buf, s, len); - return buf; -} - -/* strings.h */ -int strcasecmp(const char *s1, const char *s2) { - return strncasecmp(s1, s2, ~0); -} - -int strncasecmp(const char *s1, const char *s2, size_t n) { - for (size_t i = 0; i < n; i++) { - char c1 = tolower(s1[i]), c2 = tolower(s2[i]); - if (c1 == '\0' || c1 != c2) { - if (c1 < c2) return -1; - else if (c1 > c2) return 1; - else return 0; - } - } - return 0; -} |