Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/markupsafe/_speedups.c @ 3:758bc20232e8 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**
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2 * markupsafe._speedups
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3 * ~~~~~~~~~~~~~~~~~~~~
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4 *
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5 * C implementation of escaping for better performance. Used instead of
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6 * the native Python implementation when compiled.
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7 *
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8 * :copyright: 2010 Pallets
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9 * :license: BSD-3-Clause
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10 */
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11 #include <Python.h>
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12
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13 #if PY_MAJOR_VERSION < 3
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14 #define ESCAPED_CHARS_TABLE_SIZE 63
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15 #define UNICHR(x) (PyUnicode_AS_UNICODE((PyUnicodeObject*)PyUnicode_DecodeASCII(x, strlen(x), NULL)));
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16
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17 static Py_ssize_t escaped_chars_delta_len[ESCAPED_CHARS_TABLE_SIZE];
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18 static Py_UNICODE *escaped_chars_repl[ESCAPED_CHARS_TABLE_SIZE];
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19 #endif
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20
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21 static PyObject* markup;
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22
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23 static int
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24 init_constants(void)
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25 {
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26 PyObject *module;
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27
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28 #if PY_MAJOR_VERSION < 3
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29 /* mapping of characters to replace */
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30 escaped_chars_repl['"'] = UNICHR("&#34;");
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31 escaped_chars_repl['\''] = UNICHR("&#39;");
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32 escaped_chars_repl['&'] = UNICHR("&amp;");
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33 escaped_chars_repl['<'] = UNICHR("&lt;");
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34 escaped_chars_repl['>'] = UNICHR("&gt;");
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35
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36 /* lengths of those characters when replaced - 1 */
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37 memset(escaped_chars_delta_len, 0, sizeof (escaped_chars_delta_len));
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38 escaped_chars_delta_len['"'] = escaped_chars_delta_len['\''] = \
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39 escaped_chars_delta_len['&'] = 4;
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40 escaped_chars_delta_len['<'] = escaped_chars_delta_len['>'] = 3;
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41 #endif
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42
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43 /* import markup type so that we can mark the return value */
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44 module = PyImport_ImportModule("markupsafe");
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45 if (!module)
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46 return 0;
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47 markup = PyObject_GetAttrString(module, "Markup");
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48 Py_DECREF(module);
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49
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50 return 1;
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51 }
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52
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53 #if PY_MAJOR_VERSION < 3
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54 static PyObject*
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55 escape_unicode(PyUnicodeObject *in)
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56 {
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57 PyUnicodeObject *out;
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58 Py_UNICODE *inp = PyUnicode_AS_UNICODE(in);
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59 const Py_UNICODE *inp_end = PyUnicode_AS_UNICODE(in) + PyUnicode_GET_SIZE(in);
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60 Py_UNICODE *next_escp;
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61 Py_UNICODE *outp;
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62 Py_ssize_t delta=0, erepl=0, delta_len=0;
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63
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64 /* First we need to figure out how long the escaped string will be */
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65 while (*(inp) || inp < inp_end) {
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66 if (*inp < ESCAPED_CHARS_TABLE_SIZE) {
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67 delta += escaped_chars_delta_len[*inp];
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68 erepl += !!escaped_chars_delta_len[*inp];
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69 }
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70 ++inp;
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71 }
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72
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73 /* Do we need to escape anything at all? */
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74 if (!erepl) {
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75 Py_INCREF(in);
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76 return (PyObject*)in;
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77 }
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78
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79 out = (PyUnicodeObject*)PyUnicode_FromUnicode(NULL, PyUnicode_GET_SIZE(in) + delta);
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80 if (!out)
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81 return NULL;
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82
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83 outp = PyUnicode_AS_UNICODE(out);
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84 inp = PyUnicode_AS_UNICODE(in);
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85 while (erepl-- > 0) {
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86 /* look for the next substitution */
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87 next_escp = inp;
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88 while (next_escp < inp_end) {
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89 if (*next_escp < ESCAPED_CHARS_TABLE_SIZE &&
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90 (delta_len = escaped_chars_delta_len[*next_escp])) {
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91 ++delta_len;
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92 break;
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93 }
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94 ++next_escp;
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95 }
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96
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97 if (next_escp > inp) {
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98 /* copy unescaped chars between inp and next_escp */
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99 Py_UNICODE_COPY(outp, inp, next_escp-inp);
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100 outp += next_escp - inp;
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101 }
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102
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103 /* escape 'next_escp' */
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104 Py_UNICODE_COPY(outp, escaped_chars_repl[*next_escp], delta_len);
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105 outp += delta_len;
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106
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107 inp = next_escp + 1;
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108 }
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109 if (inp < inp_end)
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110 Py_UNICODE_COPY(outp, inp, PyUnicode_GET_SIZE(in) - (inp - PyUnicode_AS_UNICODE(in)));
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111
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112 return (PyObject*)out;
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113 }
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114 #else /* PY_MAJOR_VERSION < 3 */
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115
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116 #define GET_DELTA(inp, inp_end, delta) \
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117 while (inp < inp_end) { \
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118 switch (*inp++) { \
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119 case '"': \
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120 case '\'': \
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121 case '&': \
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122 delta += 4; \
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123 break; \
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124 case '<': \
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125 case '>': \
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126 delta += 3; \
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127 break; \
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128 } \
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129 }
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130
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131 #define DO_ESCAPE(inp, inp_end, outp) \
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132 { \
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133 Py_ssize_t ncopy = 0; \
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134 while (inp < inp_end) { \
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135 switch (*inp) { \
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136 case '"': \
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137 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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138 outp += ncopy; ncopy = 0; \
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139 *outp++ = '&'; \
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140 *outp++ = '#'; \
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141 *outp++ = '3'; \
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142 *outp++ = '4'; \
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143 *outp++ = ';'; \
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144 break; \
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145 case '\'': \
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146 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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147 outp += ncopy; ncopy = 0; \
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148 *outp++ = '&'; \
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149 *outp++ = '#'; \
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150 *outp++ = '3'; \
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151 *outp++ = '9'; \
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152 *outp++ = ';'; \
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153 break; \
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154 case '&': \
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155 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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156 outp += ncopy; ncopy = 0; \
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157 *outp++ = '&'; \
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158 *outp++ = 'a'; \
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159 *outp++ = 'm'; \
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160 *outp++ = 'p'; \
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161 *outp++ = ';'; \
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162 break; \
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163 case '<': \
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164 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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165 outp += ncopy; ncopy = 0; \
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166 *outp++ = '&'; \
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167 *outp++ = 'l'; \
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168 *outp++ = 't'; \
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169 *outp++ = ';'; \
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170 break; \
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171 case '>': \
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172 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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173 outp += ncopy; ncopy = 0; \
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174 *outp++ = '&'; \
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175 *outp++ = 'g'; \
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176 *outp++ = 't'; \
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177 *outp++ = ';'; \
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178 break; \
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179 default: \
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180 ncopy++; \
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181 } \
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182 inp++; \
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183 } \
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184 memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
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185 }
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186
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187 static PyObject*
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188 escape_unicode_kind1(PyUnicodeObject *in)
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189 {
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190 Py_UCS1 *inp = PyUnicode_1BYTE_DATA(in);
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191 Py_UCS1 *inp_end = inp + PyUnicode_GET_LENGTH(in);
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192 Py_UCS1 *outp;
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193 PyObject *out;
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194 Py_ssize_t delta = 0;
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195
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196 GET_DELTA(inp, inp_end, delta);
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197 if (!delta) {
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198 Py_INCREF(in);
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199 return (PyObject*)in;
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200 }
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201
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202 out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta,
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203 PyUnicode_IS_ASCII(in) ? 127 : 255);
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204 if (!out)
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205 return NULL;
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206
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207 inp = PyUnicode_1BYTE_DATA(in);
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208 outp = PyUnicode_1BYTE_DATA(out);
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209 DO_ESCAPE(inp, inp_end, outp);
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210 return out;
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211 }
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212
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213 static PyObject*
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214 escape_unicode_kind2(PyUnicodeObject *in)
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215 {
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216 Py_UCS2 *inp = PyUnicode_2BYTE_DATA(in);
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217 Py_UCS2 *inp_end = inp + PyUnicode_GET_LENGTH(in);
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218 Py_UCS2 *outp;
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219 PyObject *out;
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220 Py_ssize_t delta = 0;
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221
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222 GET_DELTA(inp, inp_end, delta);
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223 if (!delta) {
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224 Py_INCREF(in);
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225 return (PyObject*)in;
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226 }
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227
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228 out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 65535);
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229 if (!out)
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230 return NULL;
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231
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232 inp = PyUnicode_2BYTE_DATA(in);
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233 outp = PyUnicode_2BYTE_DATA(out);
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234 DO_ESCAPE(inp, inp_end, outp);
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235 return out;
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236 }
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237
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238
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239 static PyObject*
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240 escape_unicode_kind4(PyUnicodeObject *in)
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241 {
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242 Py_UCS4 *inp = PyUnicode_4BYTE_DATA(in);
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243 Py_UCS4 *inp_end = inp + PyUnicode_GET_LENGTH(in);
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244 Py_UCS4 *outp;
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245 PyObject *out;
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246 Py_ssize_t delta = 0;
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247
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248 GET_DELTA(inp, inp_end, delta);
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249 if (!delta) {
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250 Py_INCREF(in);
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251 return (PyObject*)in;
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252 }
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253
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254 out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 1114111);
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255 if (!out)
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256 return NULL;
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257
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258 inp = PyUnicode_4BYTE_DATA(in);
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259 outp = PyUnicode_4BYTE_DATA(out);
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260 DO_ESCAPE(inp, inp_end, outp);
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261 return out;
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262 }
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263
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264 static PyObject*
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265 escape_unicode(PyUnicodeObject *in)
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266 {
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267 if (PyUnicode_READY(in))
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268 return NULL;
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269
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270 switch (PyUnicode_KIND(in)) {
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271 case PyUnicode_1BYTE_KIND:
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272 return escape_unicode_kind1(in);
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273 case PyUnicode_2BYTE_KIND:
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274 return escape_unicode_kind2(in);
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275 case PyUnicode_4BYTE_KIND:
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276 return escape_unicode_kind4(in);
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277 }
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278 assert(0); /* shouldn't happen */
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279 return NULL;
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280 }
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281 #endif /* PY_MAJOR_VERSION < 3 */
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282
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283 static PyObject*
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284 escape(PyObject *self, PyObject *text)
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285 {
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286 static PyObject *id_html;
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287 PyObject *s = NULL, *rv = NULL, *html;
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288
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289 if (id_html == NULL) {
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290 #if PY_MAJOR_VERSION < 3
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291 id_html = PyString_InternFromString("__html__");
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292 #else
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293 id_html = PyUnicode_InternFromString("__html__");
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294 #endif
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295 if (id_html == NULL) {
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296 return NULL;
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297 }
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298 }
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299
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300 /* we don't have to escape integers, bools or floats */
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301 if (PyLong_CheckExact(text) ||
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302 #if PY_MAJOR_VERSION < 3
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303 PyInt_CheckExact(text) ||
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304 #endif
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305 PyFloat_CheckExact(text) || PyBool_Check(text) ||
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306 text == Py_None)
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307 return PyObject_CallFunctionObjArgs(markup, text, NULL);
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308
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309 /* if the object has an __html__ method that performs the escaping */
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310 html = PyObject_GetAttr(text ,id_html);
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311 if (html) {
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312 s = PyObject_CallObject(html, NULL);
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313 Py_DECREF(html);
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314 if (s == NULL) {
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315 return NULL;
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316 }
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317 /* Convert to Markup object */
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318 rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
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319 Py_DECREF(s);
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320 return rv;
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321 }
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322
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323 /* otherwise make the object unicode if it isn't, then escape */
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324 PyErr_Clear();
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325 if (!PyUnicode_Check(text)) {
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326 #if PY_MAJOR_VERSION < 3
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327 PyObject *unicode = PyObject_Unicode(text);
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328 #else
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329 PyObject *unicode = PyObject_Str(text);
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330 #endif
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331 if (!unicode)
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332 return NULL;
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333 s = escape_unicode((PyUnicodeObject*)unicode);
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334 Py_DECREF(unicode);
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335 }
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336 else
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337 s = escape_unicode((PyUnicodeObject*)text);
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338
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339 /* convert the unicode string into a markup object. */
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340 rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
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341 Py_DECREF(s);
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342 return rv;
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343 }
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344
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345
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346 static PyObject*
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347 escape_silent(PyObject *self, PyObject *text)
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348 {
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349 if (text != Py_None)
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350 return escape(self, text);
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351 return PyObject_CallFunctionObjArgs(markup, NULL);
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352 }
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353
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354
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355 static PyObject*
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356 soft_unicode(PyObject *self, PyObject *s)
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357 {
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358 if (!PyUnicode_Check(s))
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359 #if PY_MAJOR_VERSION < 3
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360 return PyObject_Unicode(s);
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361 #else
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362 return PyObject_Str(s);
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363 #endif
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364 Py_INCREF(s);
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365 return s;
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366 }
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367
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368
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369 static PyMethodDef module_methods[] = {
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370 {"escape", (PyCFunction)escape, METH_O,
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371 "escape(s) -> markup\n\n"
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372 "Convert the characters &, <, >, ', and \" in string s to HTML-safe\n"
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373 "sequences. Use this if you need to display text that might contain\n"
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374 "such characters in HTML. Marks return value as markup string."},
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375 {"escape_silent", (PyCFunction)escape_silent, METH_O,
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376 "escape_silent(s) -> markup\n\n"
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377 "Like escape but converts None to an empty string."},
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378 {"soft_unicode", (PyCFunction)soft_unicode, METH_O,
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379 "soft_unicode(object) -> string\n\n"
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380 "Make a string unicode if it isn't already. That way a markup\n"
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381 "string is not converted back to unicode."},
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382 {NULL, NULL, 0, NULL} /* Sentinel */
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383 };
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384
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385
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386 #if PY_MAJOR_VERSION < 3
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387
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388 #ifndef PyMODINIT_FUNC /* declarations for DLL import/export */
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389 #define PyMODINIT_FUNC void
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390 #endif
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391 PyMODINIT_FUNC
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392 init_speedups(void)
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393 {
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394 if (!init_constants())
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395 return;
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396
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397 Py_InitModule3("markupsafe._speedups", module_methods, "");
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398 }
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399
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400 #else /* Python 3.x module initialization */
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401
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402 static struct PyModuleDef module_definition = {
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403 PyModuleDef_HEAD_INIT,
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404 "markupsafe._speedups",
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405 NULL,
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406 -1,
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407 module_methods,
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408 NULL,
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409 NULL,
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410 NULL,
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411 NULL
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412 };
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413
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414 PyMODINIT_FUNC
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415 PyInit__speedups(void)
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416 {
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417 if (!init_constants())
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418 return NULL;
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419
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420 return PyModule_Create(&module_definition);
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421 }
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422
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423 #endif