Showing the changes to src/include (2 of 3 files). Show all
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| @@ -166,6 +166,7 @@ namespace disvm · 165 unmodified lines | |||
| 166 | // Returns this string. | 166 | // Returns this string. |
| 167 | vm_string_t &append(const vm_string_t &other); | 167 | vm_string_t &append(const vm_string_t &other); |
| 168 | 168 | ||
| 169 | // Returns the character length of the string. | ||
| 169 | word_t get_length() const; | 170 | word_t get_length() const; |
| 170 | 171 | ||
| 171 | rune_t get_rune(word_t index) const; | 172 | rune_t get_rune(word_t index) const; |
| @@ -9,6 +9,7 @@ · 8 unmodified lines | |||
| 9 | 9 | ||
| 10 | #include <cstdint> | 10 | #include <cstdint> |
| 11 | #include <cassert> | 11 | #include <cassert> |
| 12 | #include <limits> | ||
| 12 | #include <mutex> | 13 | #include <mutex> |
| 13 | #include <memory> | 14 | #include <memory> |
| 14 | #include <bitset> | 15 | #include <bitset> |
| @@ -89,7 +90,7 @@ namespace disvm · 74 unmodified lines | |||
| 89 | { | 90 | { |
| 90 | const auto flags = std::bitset<sizeof(words8) * 8>{ words8 }; | 91 | const auto flags = std::bitset<sizeof(words8) * 8>{ words8 }; |
| 91 | 92 | ||
| 92 | // Enumerating the flags in reverse order so memory access is linear. | 93 | // Enumerating the flags in reverse order so memory access is sequential. |
| 93 | if (flags[7] && (memory[0] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[0])); | 94 | if (flags[7] && (memory[0] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[0])); |
| 94 | if (flags[6] && (memory[1] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[1])); | 95 | if (flags[6] && (memory[1] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[1])); |
| 95 | if (flags[5] && (memory[2] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[2])); | 96 | if (flags[5] && (memory[2] != runtime_constants::nil)) callback(reinterpret_cast<pointer_t>(memory[2])); |
| @@ -101,6 +102,30 @@ namespace disvm · 5 unmodified lines | |||
| 101 | } | 102 | } |
| 102 | } | 103 | } |
| 103 | } | 104 | } |
| 105 | |||
| 106 | // Check if a specific pointer-sized offset in a type represents a pointer | ||
| 107 | inline bool is_offset_pointer(const type_descriptor_t &type_desc, std::size_t offset) | ||
| 108 | { | ||
| 109 | if (type_desc.size_in_bytes == 0) | ||
| 110 | return false; | ||
| 111 | |||
| 112 | assert(offset < static_cast<std::size_t>(std::numeric_limits<word_t>::max())); | ||
| 113 | const auto byte_offset = static_cast<word_t>(offset / 8); | ||
| 114 | |||
| 115 | // Highest order bit is the first field | ||
| 116 | const auto bit_offset = 7 - (offset % 8); | ||
| 117 | if (byte_offset < type_desc.map_in_bytes) | ||
| 118 | { | ||
| 119 | const auto words8 = type_desc.pointer_map[byte_offset]; | ||
| 120 | if (words8 != 0) | ||
| 121 | { | ||
| 122 | const auto flags = std::bitset<sizeof(words8) * 8>{ words8 }; | ||
| 123 | return flags[bit_offset]; | ||
| 124 | } | ||
| 125 | } | ||
| 126 | |||
| 127 | return false; | ||
| 128 | } | ||
| 104 | } | 129 | } |
| 105 | } | 130 | } |
| 106 | 131 | ||