From 5278f6def4248391a481382bd7b0042b04c829f2 Mon Sep 17 00:00:00 2001 From: Richard Qin Date: Tue, 21 Apr 2026 23:16:50 +0800 Subject: feat: add string manipulation functions derived from musl libc This commit introduces a variety of string manipulation functions, including: - `memmem`: Searches for a substring in a memory area. - `memmove`: Safely copies memory areas, handling overlaps. - `mempcpy`: Copies memory and returns a pointer to the end of the destination. - `memrchr`: Finds the last occurrence of a character in a memory area. - `memset`: Fills a memory area with a specified value. - `rindex`: Returns the last occurrence of a character in a string. - `stpcpy` and `stpncpy`: Copies strings and returns a pointer to the end. - `strcat`, `strchr`, `strcspn`, `strlcat`, `strlcpy`, `strlen`, `strncat`, `strncmp`, `strncpy`, `strnlen`, `strpbrk`, `strrchr`, `strstr`, `strtok`, and `strtok_r`: Various string manipulation functions for concatenation, searching, and tokenization. Assembly implementations for `memcpy`, `memmove`, and `memset` are also included for optimized performance on x86_64 architectures. --- na/include/libc-shim/limits.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 na/include/libc-shim/limits.h (limited to 'na/include/libc-shim/limits.h') diff --git a/na/include/libc-shim/limits.h b/na/include/libc-shim/limits.h new file mode 100644 index 0000000..a1d546e --- /dev/null +++ b/na/include/libc-shim/limits.h @@ -0,0 +1,17 @@ +/* Shim: limits for musl string functions (memmem uses SIZE_MAX) */ +#ifndef _LIMITS_H +#define _LIMITS_H + +#define CHAR_BIT 8 +#define UCHAR_MAX 255 +#define SCHAR_MAX 127 +#define SCHAR_MIN (-128) +#define INT_MAX 2147483647 +#define INT_MIN (-INT_MAX - 1) +#define UINT_MAX 4294967295U +#define LONG_MAX 9223372036854775807L +#define LONG_MIN (-LONG_MAX - 1L) +#define ULONG_MAX 18446744073709551615UL +#define SIZE_MAX ULONG_MAX + +#endif -- cgit v1.2.3