/home/andy/git/oilshell/oil/mycpp/common.h
Line | Count | Source (jump to first uncovered line) |
1 | | // common.h |
2 | | // |
3 | | // A grab bag of definitions needed in multiple places. |
4 | | |
5 | | #ifndef COMMON_H |
6 | | #define COMMON_H |
7 | | |
8 | | #include <assert.h> // assert() |
9 | | #include <ctype.h> // isalpha(), isdigit() |
10 | | #include <limits.h> // CHAR_BIT |
11 | | #include <stdarg.h> // va_list, etc. |
12 | | #include <stddef.h> // max_align_t |
13 | | #include <stdint.h> // uint8_t |
14 | | #include <stdio.h> // vprintf |
15 | | #include <stdlib.h> |
16 | | #include <string.h> // strlen |
17 | | |
18 | | #include <initializer_list> |
19 | | |
20 | | // TODO(Jesse): Put NotImplemented on a compile-time switch such that we cannot |
21 | | // make a release build if we're not finished implementing the interpreter. |
22 | | // ie. |
23 | | // |
24 | | // #if OIL_INTERNAL |
25 | | // #define NotImplemented() assert(!"Not Implemented") |
26 | | // #else |
27 | | // #define NotImplemented() NOT IMPLENTED !!! // Intentionally a compile error |
28 | | // #endif |
29 | | // |
30 | | // |
31 | 0 | #define NotImplemented() assert(!"Not Implemented") |
32 | 0 | #define InvalidCodePath() assert(!"Invalid Code Path") |
33 | | |
34 | | #define COMMA , |
35 | | |
36 | | // Prevent silent copies |
37 | | #define DISALLOW_COPY_AND_ASSIGN(TypeName) \ |
38 | | TypeName(TypeName&) = delete; \ |
39 | | void operator=(TypeName) = delete; |
40 | | |
41 | | // log() is for hand-written code, not generated |
42 | | |
43 | 265 | inline void log(const char* fmt, ...) { |
44 | 265 | va_list args; |
45 | 265 | va_start(args, fmt); |
46 | 265 | vprintf(fmt, args); |
47 | 265 | va_end(args); |
48 | 265 | puts(""); |
49 | 265 | } |
50 | | |
51 | | // I'm not sure why this matters but we get crashes when aligning to 8 bytes. |
52 | | // That is annoying. |
53 | | // Example: we get a crash in cpp/frontend_flag_spec.cc |
54 | | // auto out = new flag_spec::_FlagSpecAndMore(); |
55 | | // |
56 | | // https://stackoverflow.com/questions/52531695/int128-alignment-segment-fault-with-gcc-o-sse-optimize |
57 | | constexpr int kMask = alignof(max_align_t) - 1; // e.g. 15 or 7 |
58 | | |
59 | | // Align returned pointers to the worst case of 8 bytes (64-bit pointers) |
60 | 1 | inline size_t aligned(size_t n) { |
61 | | // https://stackoverflow.com/questions/2022179/c-quick-calculation-of-next-multiple-of-4 |
62 | | // return (n + 7) & ~7; |
63 | 1 | return (n + kMask) & ~kMask; |
64 | 1 | } |
65 | | |
66 | | const int kMaxRoots = KiB(4); |
67 | | |
68 | | #endif // COMMON_H |