classify.hxx

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#pragma once
 
#include <cstdint>
 
namespace llmx::vipa::detail {

constexpr bool is_hex_digit(char c) noexcept {
  return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
         (c >= 'A' && c <= 'F');
}

constexpr auto hex_value(char c) noexcept -> uint8_t {
  if (c >= '0' && c <= '9')
    return static_cast<uint8_t>(c - '0');
  if (c >= 'a' && c <= 'f')
    return static_cast<uint8_t>(10 + c - 'a');
  return static_cast<uint8_t>(10 + c - 'A');
}
 
} // namespace llmx::vipa::detail