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- #include <libc/unistd.h>
- #include <libc/stdlib.h>
- #include <libc/ctype.h>
- #include <libsystem/syscall.h>
- int abs(int i)
- {
- return i < 0 ? -i : i;
- }
- long labs(long i)
- {
- return i < 0 ? -i : i;
- }
- long long llabs(long long i)
- {
- return i < 0 ? -i : i;
- }
- int atoi(const char *str)
- {
- int n = 0, neg = 0;
- while (isspace(*str))
- {
- str++;
- }
- switch (*str)
- {
- case '-':
- neg = 1;
- break;
- case '+':
- str++;
- break;
- }
- /* Compute n as a negative number to avoid overflow on INT_MIN */
- while (isdigit(*str))
- {
- n = 10 * n - (*str++ - '0');
- }
- return neg ? n : -n;
- }
- /**
- * @brief 退出进程
- *
- * @param status
- */
- void exit(int status)
- {
- syscall_invoke(SYS_EXIT, status, 0, 0, 0, 0, 0, 0, 0);
- }
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