/home/andy/git/oilshell/oil/cpp/qsn.h
Line | Count | Source (jump to first uncovered line) |
1 | | // cpp/qsn.h |
2 | | |
3 | | #ifndef QSN_H |
4 | | #define QSN_H |
5 | | |
6 | | #include "mycpp/runtime.h" |
7 | | |
8 | | namespace qsn { |
9 | | |
10 | 38 | inline bool IsUnprintableLow(BigStr* ch) { |
11 | 38 | assert(len(ch) == 1); |
12 | 0 | uint8_t c = ch->data_[0]; // explicit conversion necessary |
13 | 38 | return c < ' '; |
14 | 38 | } |
15 | | |
16 | 2 | inline bool IsUnprintableHigh(BigStr* ch) { |
17 | 2 | assert(len(ch) == 1); |
18 | | // 255 should not be -1! |
19 | | // log("ch->data_[0] %d", ch->data_[0]); |
20 | 0 | uint8_t c = ch->data_[0]; // explicit conversion necessary |
21 | 2 | return c >= 0x7f; |
22 | 2 | } |
23 | | |
24 | 87 | inline bool IsPlainChar(BigStr* ch) { |
25 | 87 | assert(len(ch) == 1); |
26 | 0 | uint8_t c = ch->data_[0]; // explicit conversion necessary |
27 | 87 | switch (c) { |
28 | 0 | case '.': |
29 | 2 | case '-': |
30 | 2 | case '_': |
31 | 2 | return true; |
32 | 87 | } |
33 | 85 | return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || |
34 | 85 | ('0' <= c && c <= '9'); |
35 | 87 | } |
36 | | |
37 | 1 | inline BigStr* XEscape(BigStr* ch) { |
38 | 1 | assert(len(ch) == 1); |
39 | 0 | BigStr* result = NewStr(4); |
40 | 1 | sprintf(result->data(), "\\x%02x", ch->data_[0] & 0xff); |
41 | 1 | return result; |
42 | 1 | } |
43 | | |
44 | 1 | inline BigStr* UEscape(int codepoint) { |
45 | | // maximum length: |
46 | | // 3 for \u{ |
47 | | // 6 for codepoint |
48 | | // 1 for } |
49 | 1 | BigStr* result = OverAllocatedStr(10); |
50 | 1 | int n = sprintf(result->data(), "\\u{%x}", codepoint); |
51 | 1 | result->MaybeShrink(n); // truncate to what we wrote |
52 | 1 | return result; |
53 | 1 | } |
54 | | |
55 | | } // namespace qsn |
56 | | |
57 | | #endif // QSN_H |