diff options
Diffstat (limited to 'libc/include/string.h')
-rw-r--r-- | libc/include/string.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/libc/include/string.h b/libc/include/string.h index cd58681..5505bed 100644 --- a/libc/include/string.h +++ b/libc/include/string.h @@ -3,6 +3,7 @@ #include <stdint.h> #include <stddef.h> +#include <malloc.h> static inline void * memcpy(void * _s1, const void * _s2, size_t n) { uint8_t * s1 = (uint8_t *) _s1; @@ -15,6 +16,24 @@ static inline void * memcpy(void * _s1, const void * _s2, size_t n) { return _s1; } +static inline void * memmove(void * _s1, const void * _s2, size_t n) { + uint8_t * s1 = (uint8_t *) _s1; + const uint8_t * s2 = (uint8_t *) _s2; + size_t i; + + if (s1 < s2) { + for (i = 0; i < n; i++) + *s1++ = *s2++; + } else if (s1 > s2) { + s1 += n; + s2 += n; + for (i = 0; i < n; i++) + *--s1 = *--s2; + } + + return _s1; +} + static inline int memcmp(const void * _s1, const void * _s2, size_t n) { uint8_t * s1 = (uint8_t *) _s1; const uint8_t * s2 = (uint8_t *) _s2; @@ -41,6 +60,17 @@ static inline void * memset(void * _s, int c, size_t n) { return _s; } +static inline const void * memchr(const void * _s, int c, size_t n) { + const uint8_t * s = (uint8_t *) _s; + size_t i; + + for (i = 0; i < n; i++, s++) + if (*s == c) + return s; + + return NULL; +} + static inline char * strcat(char * s1, const char * s2) { char * r = s1; @@ -84,9 +114,22 @@ static inline const char * strchr(const char * s, char c) { return s; s++; } + return NULL; } +static inline const char * strrchr(const char * s, char c) { + const char * r = NULL; + + while (*s) { + if (*s == c) + r = s; + s++; + } + + return r; +} + static inline size_t strlen(const char * s) { size_t r = 0; @@ -96,4 +139,65 @@ static inline size_t strlen(const char * s) { return r; } +static inline char * strncat(char * s1, const char * s2, size_t n) { + char * r = s1; + + while (*s1) + s1++; + strncpy(s1, s2, n); + + return r; +} + +static inline int strcmp(const char * s1, const char * s2) { + while (*s1 && *s2) { + if (!*s1) { + return -1; + } else if (!*s2) { + return 1; + } else if (*s1 < *s2) { + return -1; + } else if (*s1 > *s2) { + return 1; + } + s1++; + s2++; + } + + return 0; +} + +static inline int strncmp(const char * s1, const char * s2, size_t n) { + while (*s1 && *s2 && n) { + if (!*s1) { + return -1; + } else if (!*s2) { + return 1; + } else if (*s1 < *s2) { + return -1; + } else if (*s1 > *s2) { + return 1; + } + s1++; + s2++; + n--; + } + + return 0; +} + +static inline char * strdup(const char * s) { + return strcpy((char *) malloc(strlen(s) + 1), s); +} + +static inline const char * strstr(const char * s1, const char * s2) { + size_t l = strlen(s2); + + while (*s1) { + if (!strncmp(s1, s2, l)) + return s1; + s1++; + } +} + #endif |