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37 lines
757 B
C
37 lines
757 B
C
#include "util.h"
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifndef __has_builtin
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#define __has_builtin(_) 0
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#endif
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void panicf(const char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vprintf(fmt, args);
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va_end(args);
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exit(1);
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}
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uint16_t parse_port(const char *str) {
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long long n = atoll(str);
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if (n <= 0 || n > UINT16_MAX)
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panicf("Invalid port: Expected a number in the range 1..%d, got '%s'\n", UINT16_MAX, str);
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return n;
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}
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uint8_t parse_hex_digit(char h) {
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if (h >= '0' && h <= '9')
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return h - '0';
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else if (h >= 'a' && h <= 'f')
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return h - 'a' + 10;
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else if (h >= 'A' && h <= 'F')
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return h - 'A' + 10;
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else
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return 0;
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}
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