| 18 | enum { REPLACEMENT_CHARACTER = 0xFFFD }; |
| 19 | |
| 20 | bool IsAnchorChar(int ch) { // test for ns-anchor-char |
| 21 | switch (ch) { |
| 22 | case ',': |
| 23 | case '[': |
| 24 | case ']': |
| 25 | case '{': |
| 26 | case '}': // c-flow-indicator |
| 27 | case ' ': |
| 28 | case '\t': // s-white |
| 29 | case 0xFEFF: // c-byte-order-mark |
| 30 | case 0xA: |
| 31 | case 0xD: // b-char |
| 32 | return false; |
| 33 | case 0x85: |
| 34 | return true; |
| 35 | } |
| 36 | |
| 37 | if (ch < 0x20) { |
| 38 | return false; |
| 39 | } |
| 40 | |
| 41 | if (ch < 0x7E) { |
| 42 | return true; |
| 43 | } |
| 44 | |
| 45 | if (ch < 0xA0) { |
| 46 | return false; |
| 47 | } |
| 48 | if (ch >= 0xD800 && ch <= 0xDFFF) { |
| 49 | return false; |
| 50 | } |
| 51 | if ((ch & 0xFFFE) == 0xFFFE) { |
| 52 | return false; |
| 53 | } |
| 54 | if ((ch >= 0xFDD0) && (ch <= 0xFDEF)) { |
| 55 | return false; |
| 56 | } |
| 57 | if (ch > 0x10FFFF) { |
| 58 | return false; |
| 59 | } |
| 60 | |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | int Utf8BytesIndicated(char ch) { |
| 65 | int byteVal = static_cast<unsigned char>(ch); |