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@@ -1,89 +1,86 b'' | |||
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1 | 1 | # charencode.py - miscellaneous character encoding |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2009 Olivia Mackall <olivia@selenic.com> and others |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | |
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9 | 9 | import array |
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10 | 10 | |
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11 | 11 | from .. import pycompat |
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12 | 12 | |
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13 | 13 | |
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14 | 14 | def isasciistr(s): |
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15 | 15 | try: |
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16 | 16 | s.decode('ascii') |
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17 | 17 | return True |
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18 | 18 | except UnicodeDecodeError: |
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19 | 19 | return False |
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20 | 20 | |
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21 | 21 | |
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22 | 22 | def asciilower(s): |
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23 | 23 | """convert a string to lowercase if ASCII |
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24 | 24 | |
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25 | 25 | Raises UnicodeDecodeError if non-ASCII characters are found.""" |
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26 | 26 | s.decode('ascii') |
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27 | 27 | return s.lower() |
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28 | 28 | |
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29 | 29 | |
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30 | 30 | def asciiupper(s): |
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31 | 31 | """convert a string to uppercase if ASCII |
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32 | 32 | |
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33 | 33 | Raises UnicodeDecodeError if non-ASCII characters are found.""" |
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34 | 34 | s.decode('ascii') |
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35 | 35 | return s.upper() |
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36 | 36 | |
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37 | 37 | |
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38 | 38 | _jsonmap = [] |
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39 | 39 | _jsonmap.extend(b"\\u%04x" % x for x in range(32)) |
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40 | 40 | _jsonmap.extend(pycompat.bytechr(x) for x in range(32, 127)) |
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41 | 41 | _jsonmap.append(b'\\u007f') |
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42 | 42 | _jsonmap[0x09] = b'\\t' |
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43 | 43 | _jsonmap[0x0A] = b'\\n' |
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44 | 44 | _jsonmap[0x22] = b'\\"' |
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45 | 45 | _jsonmap[0x5C] = b'\\\\' |
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46 | 46 | _jsonmap[0x08] = b'\\b' |
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47 | 47 | _jsonmap[0x0C] = b'\\f' |
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48 | 48 | _jsonmap[0x0D] = b'\\r' |
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49 | 49 | _paranoidjsonmap = _jsonmap[:] |
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50 | 50 | _paranoidjsonmap[0x3C] = b'\\u003c' # '<' (e.g. escape "</script>") |
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51 | 51 | _paranoidjsonmap[0x3E] = b'\\u003e' # '>' |
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52 | 52 | _jsonmap.extend(pycompat.bytechr(x) for x in range(128, 256)) |
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53 | 53 | |
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54 | 54 | |
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55 | 55 | def jsonescapeu8fast(u8chars, paranoid): |
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56 | 56 | """Convert a UTF-8 byte string to JSON-escaped form (fast path) |
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57 | 57 | |
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58 | 58 | Raises ValueError if non-ASCII characters have to be escaped. |
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59 | 59 | """ |
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60 | 60 | if paranoid: |
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61 | 61 | jm = _paranoidjsonmap |
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62 | 62 | else: |
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63 | 63 | jm = _jsonmap |
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64 | 64 | try: |
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65 | 65 | return b''.join(jm[x] for x in bytearray(u8chars)) |
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66 | 66 | except IndexError: |
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67 | 67 | raise ValueError |
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68 | 68 | |
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69 | 69 | |
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70 | if pycompat.ispy3: | |
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71 | _utf8strict = r'surrogatepass' | |
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72 | else: | |
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73 | _utf8strict = r'strict' | |
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70 | _utf8strict = r'surrogatepass' | |
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74 | 71 | |
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75 | 72 | |
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76 | 73 | def jsonescapeu8fallback(u8chars, paranoid): |
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77 | 74 | """Convert a UTF-8 byte string to JSON-escaped form (slow path) |
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78 | 75 | |
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79 | 76 | Escapes all non-ASCII characters no matter if paranoid is False. |
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80 | 77 | """ |
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81 | 78 | if paranoid: |
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82 | 79 | jm = _paranoidjsonmap |
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83 | 80 | else: |
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84 | 81 | jm = _jsonmap |
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85 | 82 | # non-BMP char is represented as UTF-16 surrogate pair |
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86 | 83 | u16b = u8chars.decode('utf-8', _utf8strict).encode('utf-16', _utf8strict) |
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87 | 84 | u16codes = array.array('H', u16b) |
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88 | 85 | u16codes.pop(0) # drop BOM |
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89 | 86 | return b''.join(jm[x] if x < 128 else b'\\u%04x' % x for x in u16codes) |
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