| … | |
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| 2 | #define DYNBUF_H__ |
2 | #define DYNBUF_H__ |
| 3 | |
3 | |
| 4 | #include <cstring> |
4 | #include <cstring> |
| 5 | #include <cassert> |
5 | #include <cassert> |
| 6 | |
6 | |
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7 | #include "util.h" |
| 7 | #include "shstr.h" |
8 | #include "shstr.h" |
| 8 | |
9 | |
| 9 | // this is a "buffer" that can grow fast |
10 | // this is a "buffer" that can grow fast |
| 10 | // and is still somewhat space-efficient. |
11 | // and is still somewhat space-efficient. |
| 11 | // unlike obstacks or other data structures, |
12 | // unlike obstacks or other data structures, |
| … | |
… | |
| 28 | int _size; |
29 | int _size; |
| 29 | |
30 | |
| 30 | chunk *first, *last; |
31 | chunk *first, *last; |
| 31 | |
32 | |
| 32 | void _reserve (int size); |
33 | void _reserve (int size); |
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34 | void _clear (); |
| 33 | void clear (); |
35 | void clear (); |
| 34 | void finish (); |
36 | void finish (); |
| 35 | |
37 | |
| 36 | public: |
38 | public: |
| 37 | |
39 | |
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… | |
| 46 | |
48 | |
| 47 | int room () const { return end - ptr; } |
49 | int room () const { return end - ptr; } |
| 48 | |
50 | |
| 49 | char *force (int size) |
51 | char *force (int size) |
| 50 | { |
52 | { |
| 51 | if (ptr + size >= end) |
53 | if (expect_false (ptr + size >= end)) |
| 52 | _reserve (size); |
54 | _reserve (size); |
| 53 | |
55 | |
| 54 | return ptr; |
56 | return ptr; |
| 55 | } |
57 | } |
| 56 | |
58 | |
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59 | char *falloc (int size) |
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60 | { |
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61 | char *res = ptr; |
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62 | ptr += size; |
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63 | return res; |
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64 | } |
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65 | |
| 57 | char *alloc (int size) |
66 | char *alloc (int size) |
| 58 | { |
67 | { |
| 59 | char *res = force (size); |
68 | force (size); |
| 60 | ptr += size; |
69 | return falloc (size); |
| 61 | return res; |
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| 62 | } |
70 | } |
| 63 | |
71 | |
| 64 | void fadd (char c) { *ptr++ = c; } |
72 | void fadd (char c) { *ptr++ = c; } |
| 65 | void fadd (unsigned char c) { fadd (char (c)); } |
73 | void fadd (unsigned char c) { fadd (char (c)); } |
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74 | void fadd (const void *p, int len) |
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75 | { |
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76 | memcpy (falloc (len), p, len); |
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77 | } |
| 66 | |
78 | |
| 67 | void add (const void *p, int len) |
79 | void add (const void *p, int len) |
| 68 | { |
80 | { |
| 69 | memcpy (alloc (len), p, len); |
81 | force (len); |
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82 | fadd (p, len); |
| 70 | } |
83 | } |
| 71 | |
84 | |
| 72 | void add (char c) |
85 | void add (char c) |
| 73 | { |
86 | { |
| 74 | alloc (1)[0] = c; |
87 | alloc (1)[0] = c; |
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… | |
| 102 | : dynbuf (initial, extend) |
115 | : dynbuf (initial, extend) |
| 103 | { } |
116 | { } |
| 104 | |
117 | |
| 105 | using dynbuf::add; |
118 | using dynbuf::add; |
| 106 | |
119 | |
| 107 | static const int max_sint32_size = 11; |
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| 108 | static const int max_sint64_size = 20; |
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| 109 | |
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| 110 | void add (sint32 i); |
120 | void add (sint32 i); |
| 111 | void add (sint64 i); |
121 | void add (sint64 i); |
| 112 | |
122 | |
| 113 | void printf (const char *format, ...); |
123 | void printf (const char *format, ...); |
| 114 | }; |
124 | }; |
