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bmap.h
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1#pragma once
2
3#include <string>
4#include <vector>
5
6struct bmap_t {
7 using bmap_type = std::vector<std::pair<size_t, size_t>>;
8
9 bmap_t() = default;
10 // fully mapped image
11 bmap_t(size_t img_size, size_t blk_size = 4096)
12 : m_img_size(img_size),
13 m_blk_size(blk_size),
14 m_blk_count(default_blocks_count(img_size, blk_size))
15 {
17 }
18
19 bmap_t& set_image_size(size_t size) {
20 m_img_size = size;
21 return *this;
22 }
23
24 bmap_t& set_block_size(size_t size = 4096) {
25 m_blk_size = size;
26 return *this;
27 }
28
29 bmap_t& set_blocks_count(size_t size = 0) {
30 if (size)
31 m_blk_count = size;
32 else
34 return *this;
35 }
36
37 bmap_t& set_mapped_range(size_t begin, size_t end) {
38 m_blk_map.emplace_back(begin, end);
39 return *this;
40 }
41
42 static size_t default_blocks_count(size_t img_size, size_t blk_size) {
43 return img_size / blk_size + (img_size % blk_size ? 1 : 0);
44 }
45
46 size_t image_size() const { return m_img_size; }
47 size_t block_size() const { return m_blk_size; }
48 size_t blocks_count() const { return m_blk_count; }
49
50 const bmap_type& mapped_ranges() const { return m_blk_map; }
51
52 bool is_mapped_block(size_t index) const;
53
54private:
55 size_t m_img_size = 0;
56 size_t m_blk_size = 4096;
57 size_t m_blk_count = 0;
59 mutable bool m_gap_set = false;
60 mutable size_t m_gap_begin = 0;
61 mutable size_t m_gap_end = 0;
62 mutable size_t m_next_gap_begin = 0;
63};
64
65int load_bmap(const std::string& filename, bmap_t& bmap);
int load_bmap(const std::string &filename, bmap_t &bmap)
Definition bmap.cpp:121
Definition bmap.h:6
std::vector< std::pair< size_t, size_t > > bmap_type
Definition bmap.h:7
bmap_t(size_t img_size, size_t blk_size=4096)
Definition bmap.h:11
size_t block_size() const
Definition bmap.h:47
size_t m_blk_count
Definition bmap.h:57
size_t m_blk_size
Definition bmap.h:56
static size_t default_blocks_count(size_t img_size, size_t blk_size)
Definition bmap.h:42
bool m_gap_set
Definition bmap.h:59
bmap_t()=default
size_t m_img_size
Definition bmap.h:55
bool is_mapped_block(size_t index) const
Definition bmap.cpp:22
size_t blocks_count() const
Definition bmap.h:48
size_t m_gap_end
Definition bmap.h:61
const bmap_type & mapped_ranges() const
Definition bmap.h:50
bmap_t & set_mapped_range(size_t begin, size_t end)
Definition bmap.h:37
size_t m_next_gap_begin
Definition bmap.h:62
bmap_t & set_image_size(size_t size)
Definition bmap.h:19
bmap_type m_blk_map
Definition bmap.h:58
size_t m_gap_begin
Definition bmap.h:60
bmap_t & set_block_size(size_t size=4096)
Definition bmap.h:24
bmap_t & set_blocks_count(size_t size=0)
Definition bmap.h:29
size_t image_size() const
Definition bmap.h:46
auto end
Definition usbhotplug.cpp:158