From b235f49f31d11e68019c42f48b6641c37e4c986e Mon Sep 17 00:00:00 2001 From: Kimplul Date: Sun, 22 Aug 2021 20:38:48 +0300 Subject: Integrated libfdt + Added new common/ directory, into which code that should be shared with init and kernel is to be added. Currently string.c and bytes.c. Code in common/ should be marked with __weak, so as to allow the arch to implement a better, more optimised version of the function if possible/required. + Created include/apos/types.h with macros essentially providing the libc limits.h and stdint.h. At the moment I use gcc/clang predefined macros for most things. --- include/apos/string.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 include/apos/string.h (limited to 'include/apos/string.h') diff --git a/include/apos/string.h b/include/apos/string.h new file mode 100644 index 0000000..787f630 --- /dev/null +++ b/include/apos/string.h @@ -0,0 +1,78 @@ +#ifndef APOS_STRING_H +#define APOS_STRING_H + +#include + +/* follow C library functions, drop location and error functions */ + +char *strcpy(char *dst, const char *src); +char *strncpy(char *dst, const char *src, size_t num); + +char *strcat(char *dst, const char *src); +char *strncat(char *dst, const char *src, size_t num); + +int strcmp(const char *str1, const char *str2); +int strncmp(const char *str1, const char *str2, size_t num); + +char *strchr(const char *str, int chr); +char *strtok(char *str, const char *delims); +char *strstr(const char *str1, const char *str2); + +char *strrchr(const char *str, int chr); +char *strpbrk(const char *str1, const char *str2); + +size_t strspn(const char *str1, const char *str2); +size_t strcspn(const char *str1, const char *str2); + +size_t strlen(const char *str); +/* only addition on top of libc */ +size_t strnlen(const char *str, size_t num); + +void *memset(void *ptr, int value, size_t num); +void *memchr(const void *ptr, int val, size_t num); +void *memcpy(void *dst, const void *src, size_t num); +void *memmove(void *dst, const void *src, size_t num); + +int memcmp(const void *ptr1, const void *ptr2, size_t num); + +/* Honorable mentions: + * + * char *strerror(int err); + * int strcoll(const char *str1, const char *str2); + * int strxfrm(char *dest, const char *src, size_t num); + * + */ + +/* provide macros for builtin functions. The compiler is always allowed to + * replace a __builtin_* with a regular call to the function, which is why we + * still need to define the functions. + * + * Does mean we can't take the address of any of these, but I suppose that's not + * an issue. + */ + +#define memcpy(dst, src, num) __builtin_memcpy(dst, src, num) +#define memmove(dst, src, num) __builtin_memmove(dst, src, num) +#define strcpy(dst, src) __builtin_strcpy(dst, src) +#define strncpy(dst, src, num) __builtin_strncpy(dst, src, num) + +#define strcat(dst, src) __builtin_strcat(dst, src) +#define strncat(dst, src, num) __builtin_strncat(dst, src, num) + +#define memcmp(p1, p2, num) __builtin_memcmp(p1, p2, num) +#define strcmp(s1, s2) __builtin_strcmp(s1, s2) +#define strncmp(s1, s2, num) __builtin_strncmp(s1, s2, num) + +#define memchr(ptr, val, num) __builtin_memchr(ptr, val, num) +#define strchr(str, chr) __builtin_strchr(str, chr) +#define strcspn(s1, s2) __builtin_strcspn(s1, s2) +#define strpbrk(s1, s2) __builtin_strpbrk(s1, s2) +#define strrchr(s1, s2) __builtin_strrchr(s1, s2) +#define strspn(s1, s2) __builtin_strspn(s1, s2) +#define strstr(s1, s2) __builtin_strstr(s1, s2) +#define strtok(s1, s2) __builtin_strtok(s1, s2) + +#define memset(p, v, n) __builtin_memset(p, v, n) +#define strlen(s) __builtin_strlen(s) + +#endif /* APOS_STRING_H */ -- cgit v1.3