forked from Bananymous/banan-os
85 lines
1.1 KiB
C++
85 lines
1.1 KiB
C++
#include <BAN/Assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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extern "C" void _fini();
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void abort(void)
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{
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ASSERT_NOT_REACHED();
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}
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void exit(int status)
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{
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fflush(nullptr);
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_fini();
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_exit(status);
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ASSERT_NOT_REACHED();
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}
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int abs(int val)
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{
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return val < 0 ? -val : val;
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}
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int atexit(void(*)(void))
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{
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return -1;
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}
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int atoi(const char* str)
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{
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while (isspace(*str))
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str++;
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bool negative = (*str == '-');
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if (*str == '-' || *str == '+')
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str++;
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int res = 0;
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while (isdigit(*str))
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{
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res = (res * 10) + (*str - '0');
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str++;
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}
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return negative ? -res : res;
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}
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char* getenv(const char*)
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{
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return nullptr;
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}
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void* malloc(size_t bytes)
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{
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long res = syscall(SYS_ALLOC, bytes);
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if (res < 0)
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return nullptr;
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return (void*)res;
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}
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void* calloc(size_t nmemb, size_t size)
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{
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if (nmemb * size < nmemb)
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return nullptr;
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void* ptr = malloc(nmemb * size);
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if (ptr == nullptr)
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return nullptr;
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memset(ptr, 0, nmemb * size);
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return ptr;
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}
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void free(void* ptr)
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{
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if (ptr == nullptr)
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return;
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syscall(SYS_FREE, ptr);
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}
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