102 lines
1.4 KiB
C
102 lines
1.4 KiB
C
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/*
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* Copyright (c) 2016 by Delphix. All rights reserved.
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*/
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#include <sys/lua/lua.h>
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ssize_t
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lcompat_sprintf(char *buf, size_t size, const char *fmt, ...)
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{
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ssize_t res;
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va_list args;
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va_start(args, fmt);
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res = vsnprintf(buf, size, fmt, args);
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va_end(args);
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return (res);
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}
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int64_t
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lcompat_strtoll(const char *str, char **ptr)
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{
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int base;
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const char *cp;
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int digits;
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int64_t value;
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boolean_t is_negative;
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cp = str;
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while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
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cp++;
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}
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is_negative = (*cp == '-');
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if (is_negative) {
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cp++;
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}
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base = 10;
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if (*cp == '0') {
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base = 8;
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cp++;
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if (*cp == 'x' || *cp == 'X') {
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base = 16;
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cp++;
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}
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}
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value = 0;
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for (; *cp != '\0'; cp++) {
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if (*cp >= '0' && *cp <= '9') {
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digits = *cp - '0';
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} else if (*cp >= 'a' && *cp <= 'f') {
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digits = *cp - 'a' + 10;
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} else if (*cp >= 'A' && *cp <= 'F') {
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digits = *cp - 'A' + 10;
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} else {
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break;
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}
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if (digits >= base) {
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break;
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}
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value = (value * base) + digits;
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}
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if (ptr != NULL) {
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*ptr = (char *)cp;
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}
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if (is_negative) {
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value = -value;
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}
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return (value);
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}
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int64_t
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lcompat_pow(int64_t x, int64_t y)
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{
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int64_t result = 1;
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if (y < 0)
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return (0);
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while (y) {
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if (y & 1)
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result *= x;
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y >>= 1;
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x *= x;
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}
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return (result);
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}
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int
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lcompat_hashnum(int64_t x)
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{
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x = (~x) + (x << 18);
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x = x ^ (x >> 31);
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x = x * 21;
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x = x ^ (x >> 11);
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x = x + (x << 6);
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x = x ^ (x >> 22);
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return ((int)x);
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}
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