109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
#include <luna/Alloc.h>
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#include <luna/CString.h>
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extern "C"
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{
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void* memcpy(void* dest, const void* src, usize n)
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{
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for (usize i = 0; i < n; ++i) { *((u8*)dest + i) = *((const u8*)src + i); }
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return dest;
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}
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void* memset(void* buf, int c, usize n)
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{
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for (usize i = 0; i < n; ++i) { *((u8*)buf + i) = (u8)c; }
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return buf;
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}
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int memcmp(const void* a, const void* b, usize n)
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{
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if (!n) return 0;
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const u8* ap = (const u8*)a;
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const u8* bp = (const u8*)b;
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while (--n && *ap == *bp)
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{
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ap++;
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bp++;
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}
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return *ap - *bp;
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}
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void* memmove(void* dest, const void* src, usize n)
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{
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if (dest == src) return dest;
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if (dest > src)
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for (long i = (long)n - 1; i >= 0; i++) { *((u8*)dest + i) = *((const u8*)src + i); }
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else
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for (long i = 0; i < (long)n; i++) { *((u8*)dest + i) = *((const u8*)src + i); }
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return dest;
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}
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usize strlen(const char* str)
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{
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const char* i = str;
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for (; *i; ++i)
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;
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return (usize)(i - str);
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}
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int strcmp(const char* a, const char* b)
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{
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while (*a && (*a == *b))
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{
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a++;
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b++;
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}
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return *(const u8*)a - *(const u8*)b;
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}
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usize wcslen(const wchar_t* str)
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{
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const wchar_t* i = str;
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for (; *i; ++i)
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;
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return (usize)(i - str);
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}
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char* strdup(const char* str)
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{
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const usize len = strlen(str);
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char* dest = (char*)malloc_impl(len + 1).value_or(nullptr);
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if (!dest) return nullptr;
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memcpy(dest, str, len + 1);
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return dest;
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}
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void nullcpy(char* dest, const char* src, usize len)
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{
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memcpy(dest, src, len);
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dest[len] = 0;
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}
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char* strcpy(char* dest, const char* src)
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{
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char* s = dest;
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for (; *src; dest++, src++) *dest = *src;
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*dest = 0;
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return s;
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}
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char* strcat(char* dest, const char* src)
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{
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char* s = dest;
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while (*dest) dest++;
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for (; *src; dest++, src++) *dest = *src;
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*dest = 0;
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return s;
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}
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char* strchr(const char* str, int c)
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{
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while (*str && *str != c) str++;
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if (*str) return const_cast<char*>(str);
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return NULL;
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}
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}
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