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1
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2
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#include "yaml_private.h" |
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3
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4
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/* |
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5
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* Declarations. |
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6
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*/ |
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7
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8
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static int |
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9
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yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem); |
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10
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11
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/* |
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12
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* Set the writer error and return 0. |
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13
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*/ |
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14
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15
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static int |
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16
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0
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yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem) |
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17
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{ |
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18
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0
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emitter->error = YAML_WRITER_ERROR; |
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19
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0
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emitter->problem = problem; |
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20
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21
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0
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return 0; |
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22
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} |
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23
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24
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/* |
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25
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* Flush the output buffer. |
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26
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*/ |
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27
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28
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YAML_DECLARE(int) |
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29
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196
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yaml_emitter_flush(yaml_emitter_t *emitter) |
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30
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{ |
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31
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int low, high; |
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32
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33
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196
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50
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assert(emitter); /* Non-NULL emitter object is expected. */ |
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34
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196
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50
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assert(emitter->write_handler); /* Write handler must be set. */ |
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35
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196
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50
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assert(emitter->encoding); /* Output encoding must be set. */ |
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36
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37
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196
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emitter->buffer.last = emitter->buffer.pointer; |
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38
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196
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emitter->buffer.pointer = emitter->buffer.start; |
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39
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40
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/* Check if the buffer is empty. */ |
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41
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42
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196
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100
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if (emitter->buffer.start == emitter->buffer.last) { |
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43
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87
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return 1; |
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44
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} |
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45
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46
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/* If the output encoding is UTF-8, we don't need to recode the buffer. */ |
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47
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48
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109
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50
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if (emitter->encoding == YAML_UTF8_ENCODING) |
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49
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{ |
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50
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109
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50
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if (emitter->write_handler(emitter->write_handler_data, |
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51
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109
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emitter->buffer.start, |
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52
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109
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emitter->buffer.last - emitter->buffer.start)) { |
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53
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109
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emitter->buffer.last = emitter->buffer.start; |
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54
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109
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emitter->buffer.pointer = emitter->buffer.start; |
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55
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109
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return 1; |
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56
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} |
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57
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else { |
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58
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0
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return yaml_emitter_set_writer_error(emitter, "write error"); |
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59
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} |
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60
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} |
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61
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62
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/* Recode the buffer into the raw buffer. */ |
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63
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64
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0
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low = (emitter->encoding == YAML_UTF16LE_ENCODING ? 0 : 1); |
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65
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0
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high = (emitter->encoding == YAML_UTF16LE_ENCODING ? 1 : 0); |
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66
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67
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0
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0
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while (emitter->buffer.pointer != emitter->buffer.last) |
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68
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{ |
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69
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unsigned char octet; |
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70
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unsigned int width; |
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71
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unsigned int value; |
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72
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size_t k; |
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73
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74
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/* |
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75
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* See the "reader.c" code for more details on UTF-8 encoding. Note |
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76
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* that we assume that the buffer contains a valid UTF-8 sequence. |
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77
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*/ |
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78
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79
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/* Read the next UTF-8 character. */ |
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80
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81
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0
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octet = emitter->buffer.pointer[0]; |
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82
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83
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0
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0
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width = (octet & 0x80) == 0x00 ? 1 : |
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0
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0
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0
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84
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0
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(octet & 0xE0) == 0xC0 ? 2 : |
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85
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0
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(octet & 0xF0) == 0xE0 ? 3 : |
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86
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0
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(octet & 0xF8) == 0xF0 ? 4 : 0; |
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87
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88
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0
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0
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value = (octet & 0x80) == 0x00 ? octet & 0x7F : |
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0
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0
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0
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89
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0
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(octet & 0xE0) == 0xC0 ? octet & 0x1F : |
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90
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0
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(octet & 0xF0) == 0xE0 ? octet & 0x0F : |
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91
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0
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(octet & 0xF8) == 0xF0 ? octet & 0x07 : 0; |
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92
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93
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0
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0
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for (k = 1; k < width; k ++) { |
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94
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0
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octet = emitter->buffer.pointer[k]; |
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95
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0
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value = (value << 6) + (octet & 0x3F); |
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96
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} |
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97
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98
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0
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emitter->buffer.pointer += width; |
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99
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100
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/* Write the character. */ |
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101
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102
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0
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0
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if (value < 0x10000) |
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103
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{ |
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104
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0
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emitter->raw_buffer.last[high] = value >> 8; |
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105
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0
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emitter->raw_buffer.last[low] = value & 0xFF; |
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106
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107
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0
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emitter->raw_buffer.last += 2; |
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108
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} |
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109
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else |
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110
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{ |
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111
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/* Write the character using a surrogate pair (check "reader.c"). */ |
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112
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113
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0
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value -= 0x10000; |
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114
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0
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emitter->raw_buffer.last[high] = 0xD8 + (value >> 18); |
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115
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0
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emitter->raw_buffer.last[low] = (value >> 10) & 0xFF; |
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116
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0
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emitter->raw_buffer.last[high+2] = 0xDC + ((value >> 8) & 0xFF); |
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117
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0
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emitter->raw_buffer.last[low+2] = value & 0xFF; |
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118
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119
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0
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emitter->raw_buffer.last += 4; |
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120
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} |
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121
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} |
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122
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123
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/* Write the raw buffer. */ |
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124
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125
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0
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0
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if (emitter->write_handler(emitter->write_handler_data, |
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126
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emitter->raw_buffer.start, |
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127
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0
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emitter->raw_buffer.last - emitter->raw_buffer.start)) { |
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128
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0
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emitter->buffer.last = emitter->buffer.start; |
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129
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0
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emitter->buffer.pointer = emitter->buffer.start; |
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130
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0
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emitter->raw_buffer.last = emitter->raw_buffer.start; |
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131
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0
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emitter->raw_buffer.pointer = emitter->raw_buffer.start; |
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132
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0
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return 1; |
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133
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} |
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134
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else { |
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135
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0
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return yaml_emitter_set_writer_error(emitter, "write error"); |
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136
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} |
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137
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} |
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138
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