1 | /* utf8.c |
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2 | * |
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3 | * Copyright (c) 1998-2002, Larry Wall |
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4 | * |
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5 | * You may distribute under the terms of either the GNU General Public |
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6 | * License or the Artistic License, as specified in the README file. |
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7 | * |
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8 | */ |
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9 | |
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10 | /* |
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11 | * 'What a fix!' said Sam. 'That's the one place in all the lands we've ever |
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12 | * heard of that we don't want to see any closer; and that's the one place |
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13 | * we're trying to get to! And that's just where we can't get, nohow.' |
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14 | * |
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15 | * 'Well do I understand your speech,' he answered in the same language; |
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16 | * 'yet few strangers do so. Why then do you not speak in the Common Tongue, |
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17 | * as is the custom in the West, if you wish to be answered?' |
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18 | * |
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19 | * ...the travellers perceived that the floor was paved with stones of many |
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20 | * hues; branching runes and strange devices intertwined beneath their feet. |
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21 | */ |
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22 | |
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23 | #include "EXTERN.h" |
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24 | #define PERL_IN_UTF8_C |
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25 | #include "perl.h" |
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26 | |
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27 | static char unees[] = "Malformed UTF-8 character (unexpected end of string)"; |
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28 | |
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29 | /* |
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30 | =head1 Unicode Support |
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31 | |
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32 | =for apidoc A|U8 *|uvuni_to_utf8_flags|U8 *d|UV uv|UV flags |
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33 | |
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34 | Adds the UTF8 representation of the Unicode codepoint C<uv> to the end |
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35 | of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free |
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36 | bytes available. The return value is the pointer to the byte after the |
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37 | end of the new character. In other words, |
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38 | |
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39 | d = uvuni_to_utf8_flags(d, uv, flags); |
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40 | |
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41 | or, in most cases, |
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42 | |
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43 | d = uvuni_to_utf8(d, uv); |
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44 | |
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45 | (which is equivalent to) |
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46 | |
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47 | d = uvuni_to_utf8_flags(d, uv, 0); |
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48 | |
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49 | is the recommended Unicode-aware way of saying |
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50 | |
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51 | *(d++) = uv; |
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52 | |
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53 | =cut |
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54 | */ |
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55 | |
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56 | U8 * |
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57 | Perl_uvuni_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) |
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58 | { |
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59 | if (ckWARN(WARN_UTF8)) { |
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60 | if (UNICODE_IS_SURROGATE(uv) && |
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61 | !(flags & UNICODE_ALLOW_SURROGATE)) |
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62 | Perl_warner(aTHX_ packWARN(WARN_UTF8), "UTF-16 surrogate 0x%04"UVxf, uv); |
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63 | else if ( |
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64 | ((uv >= 0xFDD0 && uv <= 0xFDEF && |
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65 | !(flags & UNICODE_ALLOW_FDD0)) |
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66 | || |
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67 | ((uv & 0xFFFE) == 0xFFFE && /* Either FFFE or FFFF. */ |
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68 | !(flags & UNICODE_ALLOW_FFFF))) && |
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69 | /* UNICODE_ALLOW_SUPER includes |
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70 | * FFFEs and FFFFs beyond 0x10FFFF. */ |
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71 | ((uv <= PERL_UNICODE_MAX) || |
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72 | !(flags & UNICODE_ALLOW_SUPER)) |
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73 | ) |
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74 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
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75 | "Unicode character 0x%04"UVxf" is illegal", uv); |
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76 | } |
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77 | if (UNI_IS_INVARIANT(uv)) { |
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78 | *d++ = (U8)UTF_TO_NATIVE(uv); |
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79 | return d; |
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80 | } |
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81 | #if defined(EBCDIC) |
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82 | else { |
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83 | STRLEN len = UNISKIP(uv); |
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84 | U8 *p = d+len-1; |
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85 | while (p > d) { |
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86 | *p-- = (U8)UTF_TO_NATIVE((uv & UTF_CONTINUATION_MASK) | UTF_CONTINUATION_MARK); |
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87 | uv >>= UTF_ACCUMULATION_SHIFT; |
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88 | } |
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89 | *p = (U8)UTF_TO_NATIVE((uv & UTF_START_MASK(len)) | UTF_START_MARK(len)); |
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90 | return d+len; |
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91 | } |
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92 | #else /* Non loop style */ |
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93 | if (uv < 0x800) { |
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94 | *d++ = (U8)(( uv >> 6) | 0xc0); |
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95 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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96 | return d; |
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97 | } |
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98 | if (uv < 0x10000) { |
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99 | *d++ = (U8)(( uv >> 12) | 0xe0); |
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100 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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101 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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102 | return d; |
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103 | } |
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104 | if (uv < 0x200000) { |
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105 | *d++ = (U8)(( uv >> 18) | 0xf0); |
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106 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
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107 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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108 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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109 | return d; |
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110 | } |
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111 | if (uv < 0x4000000) { |
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112 | *d++ = (U8)(( uv >> 24) | 0xf8); |
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113 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); |
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114 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
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115 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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116 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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117 | return d; |
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118 | } |
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119 | if (uv < 0x80000000) { |
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120 | *d++ = (U8)(( uv >> 30) | 0xfc); |
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121 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); |
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122 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); |
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123 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
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124 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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125 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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126 | return d; |
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127 | } |
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128 | #ifdef HAS_QUAD |
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129 | if (uv < UTF8_QUAD_MAX) |
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130 | #endif |
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131 | { |
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132 | *d++ = 0xfe; /* Can't match U+FEFF! */ |
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133 | *d++ = (U8)(((uv >> 30) & 0x3f) | 0x80); |
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134 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); |
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135 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); |
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136 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
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137 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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138 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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139 | return d; |
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140 | } |
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141 | #ifdef HAS_QUAD |
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142 | { |
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143 | *d++ = 0xff; /* Can't match U+FFFE! */ |
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144 | *d++ = 0x80; /* 6 Reserved bits */ |
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145 | *d++ = (U8)(((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */ |
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146 | *d++ = (U8)(((uv >> 54) & 0x3f) | 0x80); |
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147 | *d++ = (U8)(((uv >> 48) & 0x3f) | 0x80); |
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148 | *d++ = (U8)(((uv >> 42) & 0x3f) | 0x80); |
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149 | *d++ = (U8)(((uv >> 36) & 0x3f) | 0x80); |
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150 | *d++ = (U8)(((uv >> 30) & 0x3f) | 0x80); |
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151 | *d++ = (U8)(((uv >> 24) & 0x3f) | 0x80); |
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152 | *d++ = (U8)(((uv >> 18) & 0x3f) | 0x80); |
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153 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
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154 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
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155 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
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156 | return d; |
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157 | } |
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158 | #endif |
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159 | #endif /* Loop style */ |
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160 | } |
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161 | |
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162 | U8 * |
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163 | Perl_uvuni_to_utf8(pTHX_ U8 *d, UV uv) |
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164 | { |
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165 | return Perl_uvuni_to_utf8_flags(aTHX_ d, uv, 0); |
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166 | } |
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167 | |
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168 | |
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169 | /* |
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170 | =for apidoc A|STRLEN|is_utf8_char|U8 *s |
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171 | |
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172 | Tests if some arbitrary number of bytes begins in a valid UTF-8 |
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173 | character. Note that an INVARIANT (i.e. ASCII) character is a valid |
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174 | UTF-8 character. The actual number of bytes in the UTF-8 character |
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175 | will be returned if it is valid, otherwise 0. |
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176 | |
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177 | =cut */ |
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178 | STRLEN |
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179 | Perl_is_utf8_char(pTHX_ U8 *s) |
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180 | { |
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181 | U8 u = *s; |
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182 | STRLEN slen, len; |
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183 | UV uv, ouv; |
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184 | |
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185 | if (UTF8_IS_INVARIANT(u)) |
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186 | return 1; |
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187 | |
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188 | if (!UTF8_IS_START(u)) |
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189 | return 0; |
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190 | |
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191 | len = UTF8SKIP(s); |
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192 | |
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193 | if (len < 2 || !UTF8_IS_CONTINUATION(s[1])) |
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194 | return 0; |
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195 | |
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196 | slen = len - 1; |
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197 | s++; |
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198 | u &= UTF_START_MASK(len); |
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199 | uv = u; |
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200 | ouv = uv; |
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201 | while (slen--) { |
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202 | if (!UTF8_IS_CONTINUATION(*s)) |
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203 | return 0; |
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204 | uv = UTF8_ACCUMULATE(uv, *s); |
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205 | if (uv < ouv) |
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206 | return 0; |
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207 | ouv = uv; |
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208 | s++; |
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209 | } |
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210 | |
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211 | if ((STRLEN)UNISKIP(uv) < len) |
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212 | return 0; |
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213 | |
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214 | return len; |
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215 | } |
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216 | |
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217 | /* |
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218 | =for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len |
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219 | |
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220 | Returns true if first C<len> bytes of the given string form a valid UTF8 |
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221 | string, false otherwise. Note that 'a valid UTF8 string' does not mean |
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222 | 'a string that contains UTF8' because a valid ASCII string is a valid |
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223 | UTF8 string. |
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224 | |
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225 | =cut |
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226 | */ |
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227 | |
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228 | bool |
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229 | Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len) |
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230 | { |
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231 | U8* x = s; |
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232 | U8* send; |
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233 | STRLEN c; |
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234 | |
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235 | if (!len) |
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236 | len = strlen((char *)s); |
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237 | send = s + len; |
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238 | |
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239 | while (x < send) { |
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240 | /* Inline the easy bits of is_utf8_char() here for speed... */ |
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241 | if (UTF8_IS_INVARIANT(*x)) |
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242 | c = 1; |
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243 | else if (!UTF8_IS_START(*x)) |
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244 | return FALSE; |
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245 | else { |
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246 | /* ... and call is_utf8_char() only if really needed. */ |
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247 | c = is_utf8_char(x); |
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248 | if (!c) |
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249 | return FALSE; |
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250 | } |
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251 | x += c; |
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252 | } |
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253 | if (x != send) |
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254 | return FALSE; |
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255 | |
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256 | return TRUE; |
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257 | } |
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258 | |
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259 | /* |
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260 | =for apidoc A|UV|utf8n_to_uvuni|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags |
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261 | |
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262 | Bottom level UTF-8 decode routine. |
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263 | Returns the unicode code point value of the first character in the string C<s> |
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264 | which is assumed to be in UTF8 encoding and no longer than C<curlen>; |
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265 | C<retlen> will be set to the length, in bytes, of that character. |
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266 | |
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267 | If C<s> does not point to a well-formed UTF8 character, the behaviour |
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268 | is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY, |
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269 | it is assumed that the caller will raise a warning, and this function |
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270 | will silently just set C<retlen> to C<-1> and return zero. If the |
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271 | C<flags> does not contain UTF8_CHECK_ONLY, warnings about |
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272 | malformations will be given, C<retlen> will be set to the expected |
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273 | length of the UTF-8 character in bytes, and zero will be returned. |
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274 | |
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275 | The C<flags> can also contain various flags to allow deviations from |
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276 | the strict UTF-8 encoding (see F<utf8.h>). |
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277 | |
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278 | Most code should use utf8_to_uvchr() rather than call this directly. |
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279 | |
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280 | =cut |
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281 | */ |
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282 | |
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283 | UV |
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284 | Perl_utf8n_to_uvuni(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) |
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285 | { |
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286 | U8 *s0 = s; |
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287 | UV uv = *s, ouv = 0; |
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288 | STRLEN len = 1; |
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289 | bool dowarn = ckWARN_d(WARN_UTF8); |
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290 | UV startbyte = *s; |
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291 | STRLEN expectlen = 0; |
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292 | U32 warning = 0; |
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293 | |
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294 | /* This list is a superset of the UTF8_ALLOW_XXX. */ |
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295 | |
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296 | #define UTF8_WARN_EMPTY 1 |
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297 | #define UTF8_WARN_CONTINUATION 2 |
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298 | #define UTF8_WARN_NON_CONTINUATION 3 |
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299 | #define UTF8_WARN_FE_FF 4 |
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300 | #define UTF8_WARN_SHORT 5 |
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301 | #define UTF8_WARN_OVERFLOW 6 |
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302 | #define UTF8_WARN_SURROGATE 7 |
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303 | #define UTF8_WARN_LONG 8 |
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304 | #define UTF8_WARN_FFFF 9 /* Also FFFE. */ |
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305 | |
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306 | if (curlen == 0 && |
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307 | !(flags & UTF8_ALLOW_EMPTY)) { |
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308 | warning = UTF8_WARN_EMPTY; |
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309 | goto malformed; |
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310 | } |
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311 | |
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312 | if (UTF8_IS_INVARIANT(uv)) { |
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313 | if (retlen) |
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314 | *retlen = 1; |
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315 | return (UV) (NATIVE_TO_UTF(*s)); |
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316 | } |
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317 | |
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318 | if (UTF8_IS_CONTINUATION(uv) && |
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319 | !(flags & UTF8_ALLOW_CONTINUATION)) { |
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320 | warning = UTF8_WARN_CONTINUATION; |
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321 | goto malformed; |
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322 | } |
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323 | |
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324 | if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) && |
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325 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
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326 | warning = UTF8_WARN_NON_CONTINUATION; |
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327 | goto malformed; |
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328 | } |
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329 | |
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330 | #ifdef EBCDIC |
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331 | uv = NATIVE_TO_UTF(uv); |
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332 | #else |
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333 | if ((uv == 0xfe || uv == 0xff) && |
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334 | !(flags & UTF8_ALLOW_FE_FF)) { |
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335 | warning = UTF8_WARN_FE_FF; |
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336 | goto malformed; |
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337 | } |
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338 | #endif |
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339 | |
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340 | if (!(uv & 0x20)) { len = 2; uv &= 0x1f; } |
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341 | else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; } |
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342 | else if (!(uv & 0x08)) { len = 4; uv &= 0x07; } |
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343 | else if (!(uv & 0x04)) { len = 5; uv &= 0x03; } |
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344 | #ifdef EBCDIC |
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345 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
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346 | else { len = 7; uv &= 0x01; } |
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347 | #else |
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348 | else if (!(uv & 0x02)) { len = 6; uv &= 0x01; } |
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349 | else if (!(uv & 0x01)) { len = 7; uv = 0; } |
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350 | else { len = 13; uv = 0; } /* whoa! */ |
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351 | #endif |
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352 | |
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353 | if (retlen) |
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354 | *retlen = len; |
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355 | |
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356 | expectlen = len; |
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357 | |
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358 | if ((curlen < expectlen) && |
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359 | !(flags & UTF8_ALLOW_SHORT)) { |
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360 | warning = UTF8_WARN_SHORT; |
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361 | goto malformed; |
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362 | } |
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363 | |
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364 | len--; |
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365 | s++; |
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366 | ouv = uv; |
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367 | |
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368 | while (len--) { |
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369 | if (!UTF8_IS_CONTINUATION(*s) && |
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370 | !(flags & UTF8_ALLOW_NON_CONTINUATION)) { |
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371 | s--; |
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372 | warning = UTF8_WARN_NON_CONTINUATION; |
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373 | goto malformed; |
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374 | } |
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375 | else |
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376 | uv = UTF8_ACCUMULATE(uv, *s); |
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377 | if (!(uv > ouv)) { |
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378 | /* These cannot be allowed. */ |
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379 | if (uv == ouv) { |
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380 | if (!(flags & UTF8_ALLOW_LONG)) { |
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381 | warning = UTF8_WARN_LONG; |
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382 | goto malformed; |
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383 | } |
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384 | } |
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385 | else { /* uv < ouv */ |
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386 | /* This cannot be allowed. */ |
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387 | warning = UTF8_WARN_OVERFLOW; |
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388 | goto malformed; |
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389 | } |
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390 | } |
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391 | s++; |
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392 | ouv = uv; |
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393 | } |
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394 | |
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395 | if (UNICODE_IS_SURROGATE(uv) && |
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396 | !(flags & UTF8_ALLOW_SURROGATE)) { |
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397 | warning = UTF8_WARN_SURROGATE; |
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398 | goto malformed; |
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399 | } else if ((expectlen > (STRLEN)UNISKIP(uv)) && |
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400 | !(flags & UTF8_ALLOW_LONG)) { |
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401 | warning = UTF8_WARN_LONG; |
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402 | goto malformed; |
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403 | } else if (UNICODE_IS_ILLEGAL(uv) && |
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404 | !(flags & UTF8_ALLOW_FFFF)) { |
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405 | warning = UTF8_WARN_FFFF; |
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406 | goto malformed; |
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407 | } |
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408 | |
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409 | return uv; |
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410 | |
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411 | malformed: |
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412 | |
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413 | if (flags & UTF8_CHECK_ONLY) { |
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414 | if (retlen) |
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415 | *retlen = -1; |
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416 | return 0; |
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417 | } |
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418 | |
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419 | if (dowarn) { |
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420 | SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0)); |
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421 | |
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422 | switch (warning) { |
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423 | case 0: /* Intentionally empty. */ break; |
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424 | case UTF8_WARN_EMPTY: |
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425 | Perl_sv_catpvf(aTHX_ sv, "(empty string)"); |
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426 | break; |
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427 | case UTF8_WARN_CONTINUATION: |
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428 | Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf", with no preceding start byte)", uv); |
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429 | break; |
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430 | case UTF8_WARN_NON_CONTINUATION: |
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431 | if (s == s0) |
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432 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", immediately after start byte 0x%02"UVxf")", |
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433 | (UV)s[1], startbyte); |
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434 | else |
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435 | Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf", %d byte%s after start byte 0x%02"UVxf", expected %d bytes)", |
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436 | (UV)s[1], s - s0, s - s0 > 1 ? "s" : "", startbyte, expectlen); |
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437 | |
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438 | break; |
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439 | case UTF8_WARN_FE_FF: |
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440 | Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv); |
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441 | break; |
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442 | case UTF8_WARN_SHORT: |
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443 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")", |
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444 | curlen, curlen == 1 ? "" : "s", expectlen, startbyte); |
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445 | expectlen = curlen; /* distance for caller to skip */ |
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446 | break; |
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447 | case UTF8_WARN_OVERFLOW: |
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448 | Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x, after start byte 0x%02"UVxf")", |
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449 | ouv, *s, startbyte); |
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450 | break; |
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451 | case UTF8_WARN_SURROGATE: |
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452 | Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv); |
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453 | break; |
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454 | case UTF8_WARN_LONG: |
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455 | Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d, after start byte 0x%02"UVxf")", |
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456 | expectlen, expectlen == 1 ? "": "s", UNISKIP(uv), startbyte); |
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457 | break; |
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458 | case UTF8_WARN_FFFF: |
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459 | Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv); |
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460 | break; |
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461 | default: |
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462 | Perl_sv_catpvf(aTHX_ sv, "(unknown reason)"); |
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463 | break; |
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464 | } |
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465 | |
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466 | if (warning) { |
---|
467 | char *s = SvPVX(sv); |
---|
468 | |
---|
469 | if (PL_op) |
---|
470 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
---|
471 | "%s in %s", s, OP_DESC(PL_op)); |
---|
472 | else |
---|
473 | Perl_warner(aTHX_ packWARN(WARN_UTF8), "%s", s); |
---|
474 | } |
---|
475 | } |
---|
476 | |
---|
477 | if (retlen) |
---|
478 | *retlen = expectlen ? expectlen : len; |
---|
479 | |
---|
480 | return 0; |
---|
481 | } |
---|
482 | |
---|
483 | /* |
---|
484 | =for apidoc A|UV|utf8_to_uvchr|U8 *s|STRLEN *retlen |
---|
485 | |
---|
486 | Returns the native character value of the first character in the string C<s> |
---|
487 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
---|
488 | length, in bytes, of that character. |
---|
489 | |
---|
490 | If C<s> does not point to a well-formed UTF8 character, zero is |
---|
491 | returned and retlen is set, if possible, to -1. |
---|
492 | |
---|
493 | =cut |
---|
494 | */ |
---|
495 | |
---|
496 | UV |
---|
497 | Perl_utf8_to_uvchr(pTHX_ U8 *s, STRLEN *retlen) |
---|
498 | { |
---|
499 | return Perl_utf8n_to_uvchr(aTHX_ s, UTF8_MAXLEN, retlen, |
---|
500 | ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
---|
501 | } |
---|
502 | |
---|
503 | /* |
---|
504 | =for apidoc A|UV|utf8_to_uvuni|U8 *s|STRLEN *retlen |
---|
505 | |
---|
506 | Returns the Unicode code point of the first character in the string C<s> |
---|
507 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
---|
508 | length, in bytes, of that character. |
---|
509 | |
---|
510 | This function should only be used when returned UV is considered |
---|
511 | an index into the Unicode semantic tables (e.g. swashes). |
---|
512 | |
---|
513 | If C<s> does not point to a well-formed UTF8 character, zero is |
---|
514 | returned and retlen is set, if possible, to -1. |
---|
515 | |
---|
516 | =cut |
---|
517 | */ |
---|
518 | |
---|
519 | UV |
---|
520 | Perl_utf8_to_uvuni(pTHX_ U8 *s, STRLEN *retlen) |
---|
521 | { |
---|
522 | /* Call the low level routine asking for checks */ |
---|
523 | return Perl_utf8n_to_uvuni(aTHX_ s, UTF8_MAXLEN, retlen, |
---|
524 | ckWARN(WARN_UTF8) ? 0 : UTF8_ALLOW_ANY); |
---|
525 | } |
---|
526 | |
---|
527 | /* |
---|
528 | =for apidoc A|STRLEN|utf8_length|U8 *s|U8 *e |
---|
529 | |
---|
530 | Return the length of the UTF-8 char encoded string C<s> in characters. |
---|
531 | Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end |
---|
532 | up past C<e>, croaks. |
---|
533 | |
---|
534 | =cut |
---|
535 | */ |
---|
536 | |
---|
537 | STRLEN |
---|
538 | Perl_utf8_length(pTHX_ U8 *s, U8 *e) |
---|
539 | { |
---|
540 | STRLEN len = 0; |
---|
541 | |
---|
542 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
---|
543 | * the bitops (especially ~) can create illegal UTF-8. |
---|
544 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
---|
545 | |
---|
546 | if (e < s) { |
---|
547 | if (ckWARN_d(WARN_UTF8)) { |
---|
548 | if (PL_op) |
---|
549 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
---|
550 | "%s in %s", unees, OP_DESC(PL_op)); |
---|
551 | else |
---|
552 | Perl_warner(aTHX_ packWARN(WARN_UTF8), unees); |
---|
553 | } |
---|
554 | return 0; |
---|
555 | } |
---|
556 | while (s < e) { |
---|
557 | U8 t = UTF8SKIP(s); |
---|
558 | |
---|
559 | if (e - s < t) { |
---|
560 | if (ckWARN_d(WARN_UTF8)) { |
---|
561 | if (PL_op) |
---|
562 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
---|
563 | unees, OP_DESC(PL_op)); |
---|
564 | else |
---|
565 | Perl_warner(aTHX_ packWARN(WARN_UTF8), unees); |
---|
566 | } |
---|
567 | return len; |
---|
568 | } |
---|
569 | s += t; |
---|
570 | len++; |
---|
571 | } |
---|
572 | |
---|
573 | return len; |
---|
574 | } |
---|
575 | |
---|
576 | /* |
---|
577 | =for apidoc A|IV|utf8_distance|U8 *a|U8 *b |
---|
578 | |
---|
579 | Returns the number of UTF8 characters between the UTF-8 pointers C<a> |
---|
580 | and C<b>. |
---|
581 | |
---|
582 | WARNING: use only if you *know* that the pointers point inside the |
---|
583 | same UTF-8 buffer. |
---|
584 | |
---|
585 | =cut |
---|
586 | */ |
---|
587 | |
---|
588 | IV |
---|
589 | Perl_utf8_distance(pTHX_ U8 *a, U8 *b) |
---|
590 | { |
---|
591 | IV off = 0; |
---|
592 | |
---|
593 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g. |
---|
594 | * the bitops (especially ~) can create illegal UTF-8. |
---|
595 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
---|
596 | |
---|
597 | if (a < b) { |
---|
598 | while (a < b) { |
---|
599 | U8 c = UTF8SKIP(a); |
---|
600 | |
---|
601 | if (b - a < c) { |
---|
602 | if (ckWARN_d(WARN_UTF8)) { |
---|
603 | if (PL_op) |
---|
604 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
---|
605 | "%s in %s", unees, OP_DESC(PL_op)); |
---|
606 | else |
---|
607 | Perl_warner(aTHX_ packWARN(WARN_UTF8), unees); |
---|
608 | } |
---|
609 | return off; |
---|
610 | } |
---|
611 | a += c; |
---|
612 | off--; |
---|
613 | } |
---|
614 | } |
---|
615 | else { |
---|
616 | while (b < a) { |
---|
617 | U8 c = UTF8SKIP(b); |
---|
618 | |
---|
619 | if (a - b < c) { |
---|
620 | if (ckWARN_d(WARN_UTF8)) { |
---|
621 | if (PL_op) |
---|
622 | Perl_warner(aTHX_ packWARN(WARN_UTF8), |
---|
623 | "%s in %s", unees, OP_DESC(PL_op)); |
---|
624 | else |
---|
625 | Perl_warner(aTHX_ packWARN(WARN_UTF8), unees); |
---|
626 | } |
---|
627 | return off; |
---|
628 | } |
---|
629 | b += c; |
---|
630 | off++; |
---|
631 | } |
---|
632 | } |
---|
633 | |
---|
634 | return off; |
---|
635 | } |
---|
636 | |
---|
637 | /* |
---|
638 | =for apidoc A|U8 *|utf8_hop|U8 *s|I32 off |
---|
639 | |
---|
640 | Return the UTF-8 pointer C<s> displaced by C<off> characters, either |
---|
641 | forward or backward. |
---|
642 | |
---|
643 | WARNING: do not use the following unless you *know* C<off> is within |
---|
644 | the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned |
---|
645 | on the first byte of character or just after the last byte of a character. |
---|
646 | |
---|
647 | =cut |
---|
648 | */ |
---|
649 | |
---|
650 | U8 * |
---|
651 | Perl_utf8_hop(pTHX_ U8 *s, I32 off) |
---|
652 | { |
---|
653 | /* Note: cannot use UTF8_IS_...() too eagerly here since e.g |
---|
654 | * the bitops (especially ~) can create illegal UTF-8. |
---|
655 | * In other words: in Perl UTF-8 is not just for Unicode. */ |
---|
656 | |
---|
657 | if (off >= 0) { |
---|
658 | while (off--) |
---|
659 | s += UTF8SKIP(s); |
---|
660 | } |
---|
661 | else { |
---|
662 | while (off++) { |
---|
663 | s--; |
---|
664 | while (UTF8_IS_CONTINUATION(*s)) |
---|
665 | s--; |
---|
666 | } |
---|
667 | } |
---|
668 | return s; |
---|
669 | } |
---|
670 | |
---|
671 | /* |
---|
672 | =for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len |
---|
673 | |
---|
674 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
---|
675 | Unlike C<bytes_to_utf8>, this over-writes the original string, and |
---|
676 | updates len to contain the new length. |
---|
677 | Returns zero on failure, setting C<len> to -1. |
---|
678 | |
---|
679 | =cut |
---|
680 | */ |
---|
681 | |
---|
682 | U8 * |
---|
683 | Perl_utf8_to_bytes(pTHX_ U8 *s, STRLEN *len) |
---|
684 | { |
---|
685 | U8 *send; |
---|
686 | U8 *d; |
---|
687 | U8 *save = s; |
---|
688 | |
---|
689 | /* ensure valid UTF8 and chars < 256 before updating string */ |
---|
690 | for (send = s + *len; s < send; ) { |
---|
691 | U8 c = *s++; |
---|
692 | |
---|
693 | if (!UTF8_IS_INVARIANT(c) && |
---|
694 | (!UTF8_IS_DOWNGRADEABLE_START(c) || (s >= send) |
---|
695 | || !(c = *s++) || !UTF8_IS_CONTINUATION(c))) { |
---|
696 | *len = -1; |
---|
697 | return 0; |
---|
698 | } |
---|
699 | } |
---|
700 | |
---|
701 | d = s = save; |
---|
702 | while (s < send) { |
---|
703 | STRLEN ulen; |
---|
704 | *d++ = (U8)utf8_to_uvchr(s, &ulen); |
---|
705 | s += ulen; |
---|
706 | } |
---|
707 | *d = '\0'; |
---|
708 | *len = d - save; |
---|
709 | return save; |
---|
710 | } |
---|
711 | |
---|
712 | /* |
---|
713 | =for apidoc A|U8 *|bytes_from_utf8|U8 *s|STRLEN *len|bool *is_utf8 |
---|
714 | |
---|
715 | Converts a string C<s> of length C<len> from UTF8 into byte encoding. |
---|
716 | Unlike <utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to |
---|
717 | the newly-created string, and updates C<len> to contain the new |
---|
718 | length. Returns the original string if no conversion occurs, C<len> |
---|
719 | is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to |
---|
720 | 0 if C<s> is converted or contains all 7bit characters. |
---|
721 | |
---|
722 | =cut |
---|
723 | */ |
---|
724 | |
---|
725 | U8 * |
---|
726 | Perl_bytes_from_utf8(pTHX_ U8 *s, STRLEN *len, bool *is_utf8) |
---|
727 | { |
---|
728 | U8 *d; |
---|
729 | U8 *start = s; |
---|
730 | U8 *send; |
---|
731 | I32 count = 0; |
---|
732 | |
---|
733 | if (!*is_utf8) |
---|
734 | return start; |
---|
735 | |
---|
736 | /* ensure valid UTF8 and chars < 256 before converting string */ |
---|
737 | for (send = s + *len; s < send;) { |
---|
738 | U8 c = *s++; |
---|
739 | if (!UTF8_IS_INVARIANT(c)) { |
---|
740 | if (UTF8_IS_DOWNGRADEABLE_START(c) && s < send && |
---|
741 | (c = *s++) && UTF8_IS_CONTINUATION(c)) |
---|
742 | count++; |
---|
743 | else |
---|
744 | return start; |
---|
745 | } |
---|
746 | } |
---|
747 | |
---|
748 | *is_utf8 = 0; |
---|
749 | |
---|
750 | Newz(801, d, (*len) - count + 1, U8); |
---|
751 | s = start; start = d; |
---|
752 | while (s < send) { |
---|
753 | U8 c = *s++; |
---|
754 | if (!UTF8_IS_INVARIANT(c)) { |
---|
755 | /* Then it is two-byte encoded */ |
---|
756 | c = UTF8_ACCUMULATE(NATIVE_TO_UTF(c), *s++); |
---|
757 | c = ASCII_TO_NATIVE(c); |
---|
758 | } |
---|
759 | *d++ = c; |
---|
760 | } |
---|
761 | *d = '\0'; |
---|
762 | *len = d - start; |
---|
763 | return start; |
---|
764 | } |
---|
765 | |
---|
766 | /* |
---|
767 | =for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len |
---|
768 | |
---|
769 | Converts a string C<s> of length C<len> from ASCII into UTF8 encoding. |
---|
770 | Returns a pointer to the newly-created string, and sets C<len> to |
---|
771 | reflect the new length. |
---|
772 | |
---|
773 | =cut |
---|
774 | */ |
---|
775 | |
---|
776 | U8* |
---|
777 | Perl_bytes_to_utf8(pTHX_ U8 *s, STRLEN *len) |
---|
778 | { |
---|
779 | U8 *send; |
---|
780 | U8 *d; |
---|
781 | U8 *dst; |
---|
782 | send = s + (*len); |
---|
783 | |
---|
784 | Newz(801, d, (*len) * 2 + 1, U8); |
---|
785 | dst = d; |
---|
786 | |
---|
787 | while (s < send) { |
---|
788 | UV uv = NATIVE_TO_ASCII(*s++); |
---|
789 | if (UNI_IS_INVARIANT(uv)) |
---|
790 | *d++ = (U8)UTF_TO_NATIVE(uv); |
---|
791 | else { |
---|
792 | *d++ = (U8)UTF8_EIGHT_BIT_HI(uv); |
---|
793 | *d++ = (U8)UTF8_EIGHT_BIT_LO(uv); |
---|
794 | } |
---|
795 | } |
---|
796 | *d = '\0'; |
---|
797 | *len = d-dst; |
---|
798 | return dst; |
---|
799 | } |
---|
800 | |
---|
801 | /* |
---|
802 | * Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8. |
---|
803 | * |
---|
804 | * Destination must be pre-extended to 3/2 source. Do not use in-place. |
---|
805 | * We optimize for native, for obvious reasons. */ |
---|
806 | |
---|
807 | U8* |
---|
808 | Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
---|
809 | { |
---|
810 | U8* pend; |
---|
811 | U8* dstart = d; |
---|
812 | |
---|
813 | if (bytelen & 1) |
---|
814 | Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen"); |
---|
815 | |
---|
816 | pend = p + bytelen; |
---|
817 | |
---|
818 | while (p < pend) { |
---|
819 | UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */ |
---|
820 | p += 2; |
---|
821 | if (uv < 0x80) { |
---|
822 | *d++ = (U8)uv; |
---|
823 | continue; |
---|
824 | } |
---|
825 | if (uv < 0x800) { |
---|
826 | *d++ = (U8)(( uv >> 6) | 0xc0); |
---|
827 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
---|
828 | continue; |
---|
829 | } |
---|
830 | if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */ |
---|
831 | UV low = *p++; |
---|
832 | if (low < 0xdc00 || low >= 0xdfff) |
---|
833 | Perl_croak(aTHX_ "Malformed UTF-16 surrogate"); |
---|
834 | uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000; |
---|
835 | } |
---|
836 | if (uv < 0x10000) { |
---|
837 | *d++ = (U8)(( uv >> 12) | 0xe0); |
---|
838 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
---|
839 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
---|
840 | continue; |
---|
841 | } |
---|
842 | else { |
---|
843 | *d++ = (U8)(( uv >> 18) | 0xf0); |
---|
844 | *d++ = (U8)(((uv >> 12) & 0x3f) | 0x80); |
---|
845 | *d++ = (U8)(((uv >> 6) & 0x3f) | 0x80); |
---|
846 | *d++ = (U8)(( uv & 0x3f) | 0x80); |
---|
847 | continue; |
---|
848 | } |
---|
849 | } |
---|
850 | *newlen = d - dstart; |
---|
851 | return d; |
---|
852 | } |
---|
853 | |
---|
854 | /* Note: this one is slightly destructive of the source. */ |
---|
855 | |
---|
856 | U8* |
---|
857 | Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen) |
---|
858 | { |
---|
859 | U8* s = (U8*)p; |
---|
860 | U8* send = s + bytelen; |
---|
861 | while (s < send) { |
---|
862 | U8 tmp = s[0]; |
---|
863 | s[0] = s[1]; |
---|
864 | s[1] = tmp; |
---|
865 | s += 2; |
---|
866 | } |
---|
867 | return utf16_to_utf8(p, d, bytelen, newlen); |
---|
868 | } |
---|
869 | |
---|
870 | /* for now these are all defined (inefficiently) in terms of the utf8 versions */ |
---|
871 | |
---|
872 | bool |
---|
873 | Perl_is_uni_alnum(pTHX_ UV c) |
---|
874 | { |
---|
875 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
876 | uvchr_to_utf8(tmpbuf, c); |
---|
877 | return is_utf8_alnum(tmpbuf); |
---|
878 | } |
---|
879 | |
---|
880 | bool |
---|
881 | Perl_is_uni_alnumc(pTHX_ UV c) |
---|
882 | { |
---|
883 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
884 | uvchr_to_utf8(tmpbuf, c); |
---|
885 | return is_utf8_alnumc(tmpbuf); |
---|
886 | } |
---|
887 | |
---|
888 | bool |
---|
889 | Perl_is_uni_idfirst(pTHX_ UV c) |
---|
890 | { |
---|
891 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
892 | uvchr_to_utf8(tmpbuf, c); |
---|
893 | return is_utf8_idfirst(tmpbuf); |
---|
894 | } |
---|
895 | |
---|
896 | bool |
---|
897 | Perl_is_uni_alpha(pTHX_ UV c) |
---|
898 | { |
---|
899 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
900 | uvchr_to_utf8(tmpbuf, c); |
---|
901 | return is_utf8_alpha(tmpbuf); |
---|
902 | } |
---|
903 | |
---|
904 | bool |
---|
905 | Perl_is_uni_ascii(pTHX_ UV c) |
---|
906 | { |
---|
907 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
908 | uvchr_to_utf8(tmpbuf, c); |
---|
909 | return is_utf8_ascii(tmpbuf); |
---|
910 | } |
---|
911 | |
---|
912 | bool |
---|
913 | Perl_is_uni_space(pTHX_ UV c) |
---|
914 | { |
---|
915 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
916 | uvchr_to_utf8(tmpbuf, c); |
---|
917 | return is_utf8_space(tmpbuf); |
---|
918 | } |
---|
919 | |
---|
920 | bool |
---|
921 | Perl_is_uni_digit(pTHX_ UV c) |
---|
922 | { |
---|
923 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
924 | uvchr_to_utf8(tmpbuf, c); |
---|
925 | return is_utf8_digit(tmpbuf); |
---|
926 | } |
---|
927 | |
---|
928 | bool |
---|
929 | Perl_is_uni_upper(pTHX_ UV c) |
---|
930 | { |
---|
931 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
932 | uvchr_to_utf8(tmpbuf, c); |
---|
933 | return is_utf8_upper(tmpbuf); |
---|
934 | } |
---|
935 | |
---|
936 | bool |
---|
937 | Perl_is_uni_lower(pTHX_ UV c) |
---|
938 | { |
---|
939 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
940 | uvchr_to_utf8(tmpbuf, c); |
---|
941 | return is_utf8_lower(tmpbuf); |
---|
942 | } |
---|
943 | |
---|
944 | bool |
---|
945 | Perl_is_uni_cntrl(pTHX_ UV c) |
---|
946 | { |
---|
947 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
948 | uvchr_to_utf8(tmpbuf, c); |
---|
949 | return is_utf8_cntrl(tmpbuf); |
---|
950 | } |
---|
951 | |
---|
952 | bool |
---|
953 | Perl_is_uni_graph(pTHX_ UV c) |
---|
954 | { |
---|
955 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
956 | uvchr_to_utf8(tmpbuf, c); |
---|
957 | return is_utf8_graph(tmpbuf); |
---|
958 | } |
---|
959 | |
---|
960 | bool |
---|
961 | Perl_is_uni_print(pTHX_ UV c) |
---|
962 | { |
---|
963 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
964 | uvchr_to_utf8(tmpbuf, c); |
---|
965 | return is_utf8_print(tmpbuf); |
---|
966 | } |
---|
967 | |
---|
968 | bool |
---|
969 | Perl_is_uni_punct(pTHX_ UV c) |
---|
970 | { |
---|
971 | U8 tmpbuf[UTF8_MAXLEN+1]; |
---|
972 | uvchr_to_utf8(tmpbuf, c); |
---|
973 | return is_utf8_punct(tmpbuf); |
---|
974 | } |
---|
975 | |
---|
976 | bool |
---|
977 | Perl_is_uni_xdigit(pTHX_ UV c) |
---|
978 | { |
---|
979 | U8 tmpbuf[UTF8_MAXLEN_UCLC+1]; |
---|
980 | uvchr_to_utf8(tmpbuf, c); |
---|
981 | return is_utf8_xdigit(tmpbuf); |
---|
982 | } |
---|
983 | |
---|
984 | UV |
---|
985 | Perl_to_uni_upper(pTHX_ UV c, U8* p, STRLEN *lenp) |
---|
986 | { |
---|
987 | uvchr_to_utf8(p, c); |
---|
988 | return to_utf8_upper(p, p, lenp); |
---|
989 | } |
---|
990 | |
---|
991 | UV |
---|
992 | Perl_to_uni_title(pTHX_ UV c, U8* p, STRLEN *lenp) |
---|
993 | { |
---|
994 | uvchr_to_utf8(p, c); |
---|
995 | return to_utf8_title(p, p, lenp); |
---|
996 | } |
---|
997 | |
---|
998 | UV |
---|
999 | Perl_to_uni_lower(pTHX_ UV c, U8* p, STRLEN *lenp) |
---|
1000 | { |
---|
1001 | uvchr_to_utf8(p, c); |
---|
1002 | return to_utf8_lower(p, p, lenp); |
---|
1003 | } |
---|
1004 | |
---|
1005 | UV |
---|
1006 | Perl_to_uni_fold(pTHX_ UV c, U8* p, STRLEN *lenp) |
---|
1007 | { |
---|
1008 | uvchr_to_utf8(p, c); |
---|
1009 | return to_utf8_fold(p, p, lenp); |
---|
1010 | } |
---|
1011 | |
---|
1012 | /* for now these all assume no locale info available for Unicode > 255 */ |
---|
1013 | |
---|
1014 | bool |
---|
1015 | Perl_is_uni_alnum_lc(pTHX_ UV c) |
---|
1016 | { |
---|
1017 | return is_uni_alnum(c); /* XXX no locale support yet */ |
---|
1018 | } |
---|
1019 | |
---|
1020 | bool |
---|
1021 | Perl_is_uni_alnumc_lc(pTHX_ UV c) |
---|
1022 | { |
---|
1023 | return is_uni_alnumc(c); /* XXX no locale support yet */ |
---|
1024 | } |
---|
1025 | |
---|
1026 | bool |
---|
1027 | Perl_is_uni_idfirst_lc(pTHX_ UV c) |
---|
1028 | { |
---|
1029 | return is_uni_idfirst(c); /* XXX no locale support yet */ |
---|
1030 | } |
---|
1031 | |
---|
1032 | bool |
---|
1033 | Perl_is_uni_alpha_lc(pTHX_ UV c) |
---|
1034 | { |
---|
1035 | return is_uni_alpha(c); /* XXX no locale support yet */ |
---|
1036 | } |
---|
1037 | |
---|
1038 | bool |
---|
1039 | Perl_is_uni_ascii_lc(pTHX_ UV c) |
---|
1040 | { |
---|
1041 | return is_uni_ascii(c); /* XXX no locale support yet */ |
---|
1042 | } |
---|
1043 | |
---|
1044 | bool |
---|
1045 | Perl_is_uni_space_lc(pTHX_ UV c) |
---|
1046 | { |
---|
1047 | return is_uni_space(c); /* XXX no locale support yet */ |
---|
1048 | } |
---|
1049 | |
---|
1050 | bool |
---|
1051 | Perl_is_uni_digit_lc(pTHX_ UV c) |
---|
1052 | { |
---|
1053 | return is_uni_digit(c); /* XXX no locale support yet */ |
---|
1054 | } |
---|
1055 | |
---|
1056 | bool |
---|
1057 | Perl_is_uni_upper_lc(pTHX_ UV c) |
---|
1058 | { |
---|
1059 | return is_uni_upper(c); /* XXX no locale support yet */ |
---|
1060 | } |
---|
1061 | |
---|
1062 | bool |
---|
1063 | Perl_is_uni_lower_lc(pTHX_ UV c) |
---|
1064 | { |
---|
1065 | return is_uni_lower(c); /* XXX no locale support yet */ |
---|
1066 | } |
---|
1067 | |
---|
1068 | bool |
---|
1069 | Perl_is_uni_cntrl_lc(pTHX_ UV c) |
---|
1070 | { |
---|
1071 | return is_uni_cntrl(c); /* XXX no locale support yet */ |
---|
1072 | } |
---|
1073 | |
---|
1074 | bool |
---|
1075 | Perl_is_uni_graph_lc(pTHX_ UV c) |
---|
1076 | { |
---|
1077 | return is_uni_graph(c); /* XXX no locale support yet */ |
---|
1078 | } |
---|
1079 | |
---|
1080 | bool |
---|
1081 | Perl_is_uni_print_lc(pTHX_ UV c) |
---|
1082 | { |
---|
1083 | return is_uni_print(c); /* XXX no locale support yet */ |
---|
1084 | } |
---|
1085 | |
---|
1086 | bool |
---|
1087 | Perl_is_uni_punct_lc(pTHX_ UV c) |
---|
1088 | { |
---|
1089 | return is_uni_punct(c); /* XXX no locale support yet */ |
---|
1090 | } |
---|
1091 | |
---|
1092 | bool |
---|
1093 | Perl_is_uni_xdigit_lc(pTHX_ UV c) |
---|
1094 | { |
---|
1095 | return is_uni_xdigit(c); /* XXX no locale support yet */ |
---|
1096 | } |
---|
1097 | |
---|
1098 | U32 |
---|
1099 | Perl_to_uni_upper_lc(pTHX_ U32 c) |
---|
1100 | { |
---|
1101 | /* XXX returns only the first character -- do not use XXX */ |
---|
1102 | /* XXX no locale support yet */ |
---|
1103 | STRLEN len; |
---|
1104 | U8 tmpbuf[UTF8_MAXLEN_UCLC+1]; |
---|
1105 | return (U32)to_uni_upper(c, tmpbuf, &len); |
---|
1106 | } |
---|
1107 | |
---|
1108 | U32 |
---|
1109 | Perl_to_uni_title_lc(pTHX_ U32 c) |
---|
1110 | { |
---|
1111 | /* XXX returns only the first character XXX -- do not use XXX */ |
---|
1112 | /* XXX no locale support yet */ |
---|
1113 | STRLEN len; |
---|
1114 | U8 tmpbuf[UTF8_MAXLEN_UCLC+1]; |
---|
1115 | return (U32)to_uni_title(c, tmpbuf, &len); |
---|
1116 | } |
---|
1117 | |
---|
1118 | U32 |
---|
1119 | Perl_to_uni_lower_lc(pTHX_ U32 c) |
---|
1120 | { |
---|
1121 | /* XXX returns only the first character -- do not use XXX */ |
---|
1122 | /* XXX no locale support yet */ |
---|
1123 | STRLEN len; |
---|
1124 | U8 tmpbuf[UTF8_MAXLEN_UCLC+1]; |
---|
1125 | return (U32)to_uni_lower(c, tmpbuf, &len); |
---|
1126 | } |
---|
1127 | |
---|
1128 | bool |
---|
1129 | Perl_is_utf8_alnum(pTHX_ U8 *p) |
---|
1130 | { |
---|
1131 | if (!is_utf8_char(p)) |
---|
1132 | return FALSE; |
---|
1133 | if (!PL_utf8_alnum) |
---|
1134 | /* NOTE: "IsWord", not "IsAlnum", since Alnum is a true |
---|
1135 | * descendant of isalnum(3), in other words, it doesn't |
---|
1136 | * contain the '_'. --jhi */ |
---|
1137 | PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0); |
---|
1138 | return swash_fetch(PL_utf8_alnum, p, TRUE) != 0; |
---|
1139 | /* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */ |
---|
1140 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
---|
1141 | if (!PL_utf8_alnum) |
---|
1142 | PL_utf8_alnum = swash_init("utf8", "", |
---|
1143 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
---|
1144 | return swash_fetch(PL_utf8_alnum, p, TRUE) != 0; |
---|
1145 | #endif |
---|
1146 | } |
---|
1147 | |
---|
1148 | bool |
---|
1149 | Perl_is_utf8_alnumc(pTHX_ U8 *p) |
---|
1150 | { |
---|
1151 | if (!is_utf8_char(p)) |
---|
1152 | return FALSE; |
---|
1153 | if (!PL_utf8_alnum) |
---|
1154 | PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0); |
---|
1155 | return swash_fetch(PL_utf8_alnum, p, TRUE) != 0; |
---|
1156 | /* return is_utf8_alpha(p) || is_utf8_digit(p); */ |
---|
1157 | #ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */ |
---|
1158 | if (!PL_utf8_alnum) |
---|
1159 | PL_utf8_alnum = swash_init("utf8", "", |
---|
1160 | sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0); |
---|
1161 | return swash_fetch(PL_utf8_alnum, p, TRUE) != 0; |
---|
1162 | #endif |
---|
1163 | } |
---|
1164 | |
---|
1165 | bool |
---|
1166 | Perl_is_utf8_idfirst(pTHX_ U8 *p) /* The naming is historical. */ |
---|
1167 | { |
---|
1168 | if (*p == '_') |
---|
1169 | return TRUE; |
---|
1170 | if (!is_utf8_char(p)) |
---|
1171 | return FALSE; |
---|
1172 | if (!PL_utf8_idstart) /* is_utf8_idstart would be more logical. */ |
---|
1173 | PL_utf8_idstart = swash_init("utf8", "IdStart", &PL_sv_undef, 0, 0); |
---|
1174 | return swash_fetch(PL_utf8_idstart, p, TRUE) != 0; |
---|
1175 | } |
---|
1176 | |
---|
1177 | bool |
---|
1178 | Perl_is_utf8_idcont(pTHX_ U8 *p) |
---|
1179 | { |
---|
1180 | if (*p == '_') |
---|
1181 | return TRUE; |
---|
1182 | if (!is_utf8_char(p)) |
---|
1183 | return FALSE; |
---|
1184 | if (!PL_utf8_idcont) |
---|
1185 | PL_utf8_idcont = swash_init("utf8", "IdContinue", &PL_sv_undef, 0, 0); |
---|
1186 | return swash_fetch(PL_utf8_idcont, p, TRUE) != 0; |
---|
1187 | } |
---|
1188 | |
---|
1189 | bool |
---|
1190 | Perl_is_utf8_alpha(pTHX_ U8 *p) |
---|
1191 | { |
---|
1192 | if (!is_utf8_char(p)) |
---|
1193 | return FALSE; |
---|
1194 | if (!PL_utf8_alpha) |
---|
1195 | PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0); |
---|
1196 | return swash_fetch(PL_utf8_alpha, p, TRUE) != 0; |
---|
1197 | } |
---|
1198 | |
---|
1199 | bool |
---|
1200 | Perl_is_utf8_ascii(pTHX_ U8 *p) |
---|
1201 | { |
---|
1202 | if (!is_utf8_char(p)) |
---|
1203 | return FALSE; |
---|
1204 | if (!PL_utf8_ascii) |
---|
1205 | PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0); |
---|
1206 | return swash_fetch(PL_utf8_ascii, p, TRUE) != 0; |
---|
1207 | } |
---|
1208 | |
---|
1209 | bool |
---|
1210 | Perl_is_utf8_space(pTHX_ U8 *p) |
---|
1211 | { |
---|
1212 | if (!is_utf8_char(p)) |
---|
1213 | return FALSE; |
---|
1214 | if (!PL_utf8_space) |
---|
1215 | PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0); |
---|
1216 | return swash_fetch(PL_utf8_space, p, TRUE) != 0; |
---|
1217 | } |
---|
1218 | |
---|
1219 | bool |
---|
1220 | Perl_is_utf8_digit(pTHX_ U8 *p) |
---|
1221 | { |
---|
1222 | if (!is_utf8_char(p)) |
---|
1223 | return FALSE; |
---|
1224 | if (!PL_utf8_digit) |
---|
1225 | PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0); |
---|
1226 | return swash_fetch(PL_utf8_digit, p, TRUE) != 0; |
---|
1227 | } |
---|
1228 | |
---|
1229 | bool |
---|
1230 | Perl_is_utf8_upper(pTHX_ U8 *p) |
---|
1231 | { |
---|
1232 | if (!is_utf8_char(p)) |
---|
1233 | return FALSE; |
---|
1234 | if (!PL_utf8_upper) |
---|
1235 | PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0); |
---|
1236 | return swash_fetch(PL_utf8_upper, p, TRUE) != 0; |
---|
1237 | } |
---|
1238 | |
---|
1239 | bool |
---|
1240 | Perl_is_utf8_lower(pTHX_ U8 *p) |
---|
1241 | { |
---|
1242 | if (!is_utf8_char(p)) |
---|
1243 | return FALSE; |
---|
1244 | if (!PL_utf8_lower) |
---|
1245 | PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0); |
---|
1246 | return swash_fetch(PL_utf8_lower, p, TRUE) != 0; |
---|
1247 | } |
---|
1248 | |
---|
1249 | bool |
---|
1250 | Perl_is_utf8_cntrl(pTHX_ U8 *p) |
---|
1251 | { |
---|
1252 | if (!is_utf8_char(p)) |
---|
1253 | return FALSE; |
---|
1254 | if (!PL_utf8_cntrl) |
---|
1255 | PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0); |
---|
1256 | return swash_fetch(PL_utf8_cntrl, p, TRUE) != 0; |
---|
1257 | } |
---|
1258 | |
---|
1259 | bool |
---|
1260 | Perl_is_utf8_graph(pTHX_ U8 *p) |
---|
1261 | { |
---|
1262 | if (!is_utf8_char(p)) |
---|
1263 | return FALSE; |
---|
1264 | if (!PL_utf8_graph) |
---|
1265 | PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0); |
---|
1266 | return swash_fetch(PL_utf8_graph, p, TRUE) != 0; |
---|
1267 | } |
---|
1268 | |
---|
1269 | bool |
---|
1270 | Perl_is_utf8_print(pTHX_ U8 *p) |
---|
1271 | { |
---|
1272 | if (!is_utf8_char(p)) |
---|
1273 | return FALSE; |
---|
1274 | if (!PL_utf8_print) |
---|
1275 | PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0); |
---|
1276 | return swash_fetch(PL_utf8_print, p, TRUE) != 0; |
---|
1277 | } |
---|
1278 | |
---|
1279 | bool |
---|
1280 | Perl_is_utf8_punct(pTHX_ U8 *p) |
---|
1281 | { |
---|
1282 | if (!is_utf8_char(p)) |
---|
1283 | return FALSE; |
---|
1284 | if (!PL_utf8_punct) |
---|
1285 | PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0); |
---|
1286 | return swash_fetch(PL_utf8_punct, p, TRUE) != 0; |
---|
1287 | } |
---|
1288 | |
---|
1289 | bool |
---|
1290 | Perl_is_utf8_xdigit(pTHX_ U8 *p) |
---|
1291 | { |
---|
1292 | if (!is_utf8_char(p)) |
---|
1293 | return FALSE; |
---|
1294 | if (!PL_utf8_xdigit) |
---|
1295 | PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0); |
---|
1296 | return swash_fetch(PL_utf8_xdigit, p, TRUE) != 0; |
---|
1297 | } |
---|
1298 | |
---|
1299 | bool |
---|
1300 | Perl_is_utf8_mark(pTHX_ U8 *p) |
---|
1301 | { |
---|
1302 | if (!is_utf8_char(p)) |
---|
1303 | return FALSE; |
---|
1304 | if (!PL_utf8_mark) |
---|
1305 | PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0); |
---|
1306 | return swash_fetch(PL_utf8_mark, p, TRUE) != 0; |
---|
1307 | } |
---|
1308 | |
---|
1309 | /* |
---|
1310 | =for apidoc A|UV|to_utf8_case|U8 *p|U8* ustrp|STRLEN *lenp|SV **swash|char *normal|char *special |
---|
1311 | |
---|
1312 | The "p" contains the pointer to the UTF-8 string encoding |
---|
1313 | the character that is being converted. |
---|
1314 | |
---|
1315 | The "ustrp" is a pointer to the character buffer to put the |
---|
1316 | conversion result to. The "lenp" is a pointer to the length |
---|
1317 | of the result. |
---|
1318 | |
---|
1319 | The "swashp" is a pointer to the swash to use. |
---|
1320 | |
---|
1321 | Both the special and normal mappings are stored lib/unicore/To/Foo.pl, |
---|
1322 | and loaded by SWASHGET, using lib/utf8_heavy.pl. The special (usually, |
---|
1323 | but not always, a multicharacter mapping), is tried first. |
---|
1324 | |
---|
1325 | The "special" is a string like "utf8::ToSpecLower", which means the |
---|
1326 | hash %utf8::ToSpecLower. The access to the hash is through |
---|
1327 | Perl_to_utf8_case(). |
---|
1328 | |
---|
1329 | The "normal" is a string like "ToLower" which means the swash |
---|
1330 | %utf8::ToLower. |
---|
1331 | |
---|
1332 | =cut */ |
---|
1333 | |
---|
1334 | UV |
---|
1335 | Perl_to_utf8_case(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp, SV **swashp, char *normal, char *special) |
---|
1336 | { |
---|
1337 | UV uv0, uv1; |
---|
1338 | U8 tmpbuf[UTF8_MAXLEN_FOLD+1]; |
---|
1339 | STRLEN len = 0; |
---|
1340 | |
---|
1341 | uv0 = utf8_to_uvchr(p, 0); |
---|
1342 | /* The NATIVE_TO_UNI() and UNI_TO_NATIVE() mappings |
---|
1343 | * are necessary in EBCDIC, they are redundant no-ops |
---|
1344 | * in ASCII-ish platforms, and hopefully optimized away. */ |
---|
1345 | uv1 = NATIVE_TO_UNI(uv0); |
---|
1346 | uvuni_to_utf8(tmpbuf, uv1); |
---|
1347 | |
---|
1348 | if (!*swashp) /* load on-demand */ |
---|
1349 | *swashp = swash_init("utf8", normal, &PL_sv_undef, 4, 0); |
---|
1350 | |
---|
1351 | if (special) { |
---|
1352 | /* It might be "special" (sometimes, but not always, |
---|
1353 | * a multicharacter mapping) */ |
---|
1354 | HV *hv; |
---|
1355 | SV *keysv; |
---|
1356 | HE *he; |
---|
1357 | SV *val; |
---|
1358 | |
---|
1359 | if ((hv = get_hv(special, FALSE)) && |
---|
1360 | (keysv = sv_2mortal(Perl_newSVpvf(aTHX_ "%04"UVXf, uv1))) && |
---|
1361 | (he = hv_fetch_ent(hv, keysv, FALSE, 0)) && |
---|
1362 | (val = HeVAL(he))) { |
---|
1363 | char *s; |
---|
1364 | |
---|
1365 | s = SvPV(val, len); |
---|
1366 | if (len == 1) |
---|
1367 | len = uvuni_to_utf8(ustrp, NATIVE_TO_UNI(*(U8*)s)) - ustrp; |
---|
1368 | else { |
---|
1369 | #ifdef EBCDIC |
---|
1370 | /* If we have EBCDIC we need to remap the characters |
---|
1371 | * since any characters in the low 256 are Unicode |
---|
1372 | * code points, not EBCDIC. */ |
---|
1373 | U8 *t = (U8*)s, *tend = t + len, *d; |
---|
1374 | |
---|
1375 | d = tmpbuf; |
---|
1376 | if (SvUTF8(val)) { |
---|
1377 | STRLEN tlen = 0; |
---|
1378 | |
---|
1379 | while (t < tend) { |
---|
1380 | UV c = utf8_to_uvchr(t, &tlen); |
---|
1381 | if (tlen > 0) { |
---|
1382 | d = uvchr_to_utf8(d, UNI_TO_NATIVE(c)); |
---|
1383 | t += tlen; |
---|
1384 | } |
---|
1385 | else |
---|
1386 | break; |
---|
1387 | } |
---|
1388 | } |
---|
1389 | else { |
---|
1390 | while (t < tend) { |
---|
1391 | d = uvchr_to_utf8(d, UNI_TO_NATIVE(*t)); |
---|
1392 | t++; |
---|
1393 | } |
---|
1394 | } |
---|
1395 | len = d - tmpbuf; |
---|
1396 | Copy(tmpbuf, ustrp, len, U8); |
---|
1397 | #else |
---|
1398 | Copy(s, ustrp, len, U8); |
---|
1399 | #endif |
---|
1400 | } |
---|
1401 | } |
---|
1402 | } |
---|
1403 | |
---|
1404 | if (!len && *swashp) { |
---|
1405 | UV uv2 = swash_fetch(*swashp, tmpbuf, TRUE); |
---|
1406 | |
---|
1407 | if (uv2) { |
---|
1408 | /* It was "normal" (a single character mapping). */ |
---|
1409 | UV uv3 = UNI_TO_NATIVE(uv2); |
---|
1410 | |
---|
1411 | len = uvchr_to_utf8(ustrp, uv3) - ustrp; |
---|
1412 | } |
---|
1413 | } |
---|
1414 | |
---|
1415 | if (!len) /* Neither: just copy. */ |
---|
1416 | len = uvchr_to_utf8(ustrp, uv0) - ustrp; |
---|
1417 | |
---|
1418 | if (lenp) |
---|
1419 | *lenp = len; |
---|
1420 | |
---|
1421 | return len ? utf8_to_uvchr(ustrp, 0) : 0; |
---|
1422 | } |
---|
1423 | |
---|
1424 | /* |
---|
1425 | =for apidoc A|UV|to_utf8_upper|U8 *p|U8 *ustrp|STRLEN *lenp |
---|
1426 | |
---|
1427 | Convert the UTF-8 encoded character at p to its uppercase version and |
---|
1428 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note |
---|
1429 | that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the |
---|
1430 | uppercase version may be longer than the original character (up to two |
---|
1431 | characters). |
---|
1432 | |
---|
1433 | The first character of the uppercased version is returned |
---|
1434 | (but note, as explained above, that there may be more.) |
---|
1435 | |
---|
1436 | =cut */ |
---|
1437 | |
---|
1438 | UV |
---|
1439 | Perl_to_utf8_upper(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
---|
1440 | { |
---|
1441 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
---|
1442 | &PL_utf8_toupper, "ToUpper", "utf8::ToSpecUpper"); |
---|
1443 | } |
---|
1444 | |
---|
1445 | /* |
---|
1446 | =for apidoc A|UV|to_utf8_title|U8 *p|U8 *ustrp|STRLEN *lenp |
---|
1447 | |
---|
1448 | Convert the UTF-8 encoded character at p to its titlecase version and |
---|
1449 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note |
---|
1450 | that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the |
---|
1451 | titlecase version may be longer than the original character (up to two |
---|
1452 | characters). |
---|
1453 | |
---|
1454 | The first character of the titlecased version is returned |
---|
1455 | (but note, as explained above, that there may be more.) |
---|
1456 | |
---|
1457 | =cut */ |
---|
1458 | |
---|
1459 | UV |
---|
1460 | Perl_to_utf8_title(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
---|
1461 | { |
---|
1462 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
---|
1463 | &PL_utf8_totitle, "ToTitle", "utf8::ToSpecTitle"); |
---|
1464 | } |
---|
1465 | |
---|
1466 | /* |
---|
1467 | =for apidoc A|UV|to_utf8_lower|U8 *p|U8 *ustrp|STRLEN *lenp |
---|
1468 | |
---|
1469 | Convert the UTF-8 encoded character at p to its lowercase version and |
---|
1470 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note |
---|
1471 | that the ustrp needs to be at least UTF8_MAXLEN_UCLC+1 bytes since the |
---|
1472 | lowercase version may be longer than the original character (up to two |
---|
1473 | characters). |
---|
1474 | |
---|
1475 | The first character of the lowercased version is returned |
---|
1476 | (but note, as explained above, that there may be more.) |
---|
1477 | |
---|
1478 | =cut */ |
---|
1479 | |
---|
1480 | UV |
---|
1481 | Perl_to_utf8_lower(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
---|
1482 | { |
---|
1483 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
---|
1484 | &PL_utf8_tolower, "ToLower", "utf8::ToSpecLower"); |
---|
1485 | } |
---|
1486 | |
---|
1487 | /* |
---|
1488 | =for apidoc A|UV|to_utf8_fold|U8 *p|U8 *ustrp|STRLEN *lenp |
---|
1489 | |
---|
1490 | Convert the UTF-8 encoded character at p to its foldcase version and |
---|
1491 | store that in UTF-8 in ustrp and its length in bytes in lenp. Note |
---|
1492 | that the ustrp needs to be at least UTF8_MAXLEN_FOLD+1 bytes since the |
---|
1493 | foldcase version may be longer than the original character (up to |
---|
1494 | three characters). |
---|
1495 | |
---|
1496 | The first character of the foldcased version is returned |
---|
1497 | (but note, as explained above, that there may be more.) |
---|
1498 | |
---|
1499 | =cut */ |
---|
1500 | |
---|
1501 | UV |
---|
1502 | Perl_to_utf8_fold(pTHX_ U8 *p, U8* ustrp, STRLEN *lenp) |
---|
1503 | { |
---|
1504 | return Perl_to_utf8_case(aTHX_ p, ustrp, lenp, |
---|
1505 | &PL_utf8_tofold, "ToFold", "utf8::ToSpecFold"); |
---|
1506 | } |
---|
1507 | |
---|
1508 | /* a "swash" is a swatch hash */ |
---|
1509 | |
---|
1510 | SV* |
---|
1511 | Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none) |
---|
1512 | { |
---|
1513 | SV* retval; |
---|
1514 | SV* tokenbufsv = sv_2mortal(NEWSV(0,0)); |
---|
1515 | dSP; |
---|
1516 | HV *stash = gv_stashpvn(pkg, strlen(pkg), FALSE); |
---|
1517 | SV* errsv_save; |
---|
1518 | |
---|
1519 | if (!gv_fetchmeth(stash, "SWASHNEW", 8, -1)) { /* demand load utf8 */ |
---|
1520 | ENTER; |
---|
1521 | errsv_save = newSVsv(ERRSV); |
---|
1522 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv); |
---|
1523 | if (!SvTRUE(ERRSV)) |
---|
1524 | sv_setsv(ERRSV, errsv_save); |
---|
1525 | SvREFCNT_dec(errsv_save); |
---|
1526 | LEAVE; |
---|
1527 | } |
---|
1528 | SPAGAIN; |
---|
1529 | PUSHSTACKi(PERLSI_MAGIC); |
---|
1530 | PUSHMARK(SP); |
---|
1531 | EXTEND(SP,5); |
---|
1532 | PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg)))); |
---|
1533 | PUSHs(sv_2mortal(newSVpvn(name, strlen(name)))); |
---|
1534 | PUSHs(listsv); |
---|
1535 | PUSHs(sv_2mortal(newSViv(minbits))); |
---|
1536 | PUSHs(sv_2mortal(newSViv(none))); |
---|
1537 | PUTBACK; |
---|
1538 | ENTER; |
---|
1539 | SAVEI32(PL_hints); |
---|
1540 | PL_hints = 0; |
---|
1541 | save_re_context(); |
---|
1542 | if (PL_curcop == &PL_compiling) { |
---|
1543 | /* XXX ought to be handled by lex_start */ |
---|
1544 | SAVEI32(PL_in_my); |
---|
1545 | sv_setpv(tokenbufsv, PL_tokenbuf); |
---|
1546 | } |
---|
1547 | errsv_save = newSVsv(ERRSV); |
---|
1548 | if (call_method("SWASHNEW", G_SCALAR)) |
---|
1549 | retval = newSVsv(*PL_stack_sp--); |
---|
1550 | else |
---|
1551 | retval = &PL_sv_undef; |
---|
1552 | if (!SvTRUE(ERRSV)) |
---|
1553 | sv_setsv(ERRSV, errsv_save); |
---|
1554 | SvREFCNT_dec(errsv_save); |
---|
1555 | LEAVE; |
---|
1556 | POPSTACK; |
---|
1557 | if (PL_curcop == &PL_compiling) { |
---|
1558 | STRLEN len; |
---|
1559 | char* pv = SvPV(tokenbufsv, len); |
---|
1560 | |
---|
1561 | Copy(pv, PL_tokenbuf, len+1, char); |
---|
1562 | PL_curcop->op_private = (U8)(PL_hints & HINT_PRIVATE_MASK); |
---|
1563 | } |
---|
1564 | if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV) { |
---|
1565 | if (SvPOK(retval)) |
---|
1566 | Perl_croak(aTHX_ "Can't find Unicode property definition \"%s\"", |
---|
1567 | SvPV_nolen(retval)); |
---|
1568 | Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref"); |
---|
1569 | } |
---|
1570 | return retval; |
---|
1571 | } |
---|
1572 | |
---|
1573 | |
---|
1574 | /* This API is wrong for special case conversions since we may need to |
---|
1575 | * return several Unicode characters for a single Unicode character |
---|
1576 | * (see lib/unicore/SpecCase.txt) The SWASHGET in lib/utf8_heavy.pl is |
---|
1577 | * the lower-level routine, and it is similarly broken for returning |
---|
1578 | * multiple values. --jhi */ |
---|
1579 | UV |
---|
1580 | Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr, bool do_utf8) |
---|
1581 | { |
---|
1582 | HV* hv = (HV*)SvRV(sv); |
---|
1583 | U32 klen; |
---|
1584 | U32 off; |
---|
1585 | STRLEN slen; |
---|
1586 | STRLEN needents; |
---|
1587 | U8 *tmps = NULL; |
---|
1588 | U32 bit; |
---|
1589 | SV *retval; |
---|
1590 | U8 tmputf8[2]; |
---|
1591 | UV c = NATIVE_TO_ASCII(*ptr); |
---|
1592 | |
---|
1593 | if (!do_utf8 && !UNI_IS_INVARIANT(c)) { |
---|
1594 | tmputf8[0] = (U8)UTF8_EIGHT_BIT_HI(c); |
---|
1595 | tmputf8[1] = (U8)UTF8_EIGHT_BIT_LO(c); |
---|
1596 | ptr = tmputf8; |
---|
1597 | } |
---|
1598 | /* Given a UTF-X encoded char 0xAA..0xYY,0xZZ |
---|
1599 | * then the "swatch" is a vec() for al the chars which start |
---|
1600 | * with 0xAA..0xYY |
---|
1601 | * So the key in the hash (klen) is length of encoded char -1 |
---|
1602 | */ |
---|
1603 | klen = UTF8SKIP(ptr) - 1; |
---|
1604 | off = ptr[klen]; |
---|
1605 | |
---|
1606 | if (klen == 0) |
---|
1607 | { |
---|
1608 | /* If char in invariant then swatch is for all the invariant chars |
---|
1609 | * In both UTF-8 and UTF8-MOD that happens to be UTF_CONTINUATION_MARK |
---|
1610 | */ |
---|
1611 | needents = UTF_CONTINUATION_MARK; |
---|
1612 | off = NATIVE_TO_UTF(ptr[klen]); |
---|
1613 | } |
---|
1614 | else |
---|
1615 | { |
---|
1616 | /* If char is encoded then swatch is for the prefix */ |
---|
1617 | needents = (1 << UTF_ACCUMULATION_SHIFT); |
---|
1618 | off = NATIVE_TO_UTF(ptr[klen]) & UTF_CONTINUATION_MASK; |
---|
1619 | } |
---|
1620 | |
---|
1621 | /* |
---|
1622 | * This single-entry cache saves about 1/3 of the utf8 overhead in test |
---|
1623 | * suite. (That is, only 7-8% overall over just a hash cache. Still, |
---|
1624 | * it's nothing to sniff at.) Pity we usually come through at least |
---|
1625 | * two function calls to get here... |
---|
1626 | * |
---|
1627 | * NB: this code assumes that swatches are never modified, once generated! |
---|
1628 | */ |
---|
1629 | |
---|
1630 | if (hv == PL_last_swash_hv && |
---|
1631 | klen == PL_last_swash_klen && |
---|
1632 | (!klen || memEQ((char *)ptr, (char *)PL_last_swash_key, klen)) ) |
---|
1633 | { |
---|
1634 | tmps = PL_last_swash_tmps; |
---|
1635 | slen = PL_last_swash_slen; |
---|
1636 | } |
---|
1637 | else { |
---|
1638 | /* Try our second-level swatch cache, kept in a hash. */ |
---|
1639 | SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE); |
---|
1640 | |
---|
1641 | /* If not cached, generate it via utf8::SWASHGET */ |
---|
1642 | if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) { |
---|
1643 | dSP; |
---|
1644 | /* We use utf8n_to_uvuni() as we want an index into |
---|
1645 | Unicode tables, not a native character number. |
---|
1646 | */ |
---|
1647 | UV code_point = utf8n_to_uvuni(ptr, UTF8_MAXLEN, 0, |
---|
1648 | ckWARN(WARN_UTF8) ? |
---|
1649 | 0 : UTF8_ALLOW_ANY); |
---|
1650 | SV *errsv_save; |
---|
1651 | ENTER; |
---|
1652 | SAVETMPS; |
---|
1653 | save_re_context(); |
---|
1654 | PUSHSTACKi(PERLSI_MAGIC); |
---|
1655 | PUSHMARK(SP); |
---|
1656 | EXTEND(SP,3); |
---|
1657 | PUSHs((SV*)sv); |
---|
1658 | /* On EBCDIC & ~(0xA0-1) isn't a useful thing to do */ |
---|
1659 | PUSHs(sv_2mortal(newSViv((klen) ? |
---|
1660 | (code_point & ~(needents - 1)) : 0))); |
---|
1661 | PUSHs(sv_2mortal(newSViv(needents))); |
---|
1662 | PUTBACK; |
---|
1663 | errsv_save = newSVsv(ERRSV); |
---|
1664 | if (call_method("SWASHGET", G_SCALAR)) |
---|
1665 | retval = newSVsv(*PL_stack_sp--); |
---|
1666 | else |
---|
1667 | retval = &PL_sv_undef; |
---|
1668 | if (!SvTRUE(ERRSV)) |
---|
1669 | sv_setsv(ERRSV, errsv_save); |
---|
1670 | SvREFCNT_dec(errsv_save); |
---|
1671 | POPSTACK; |
---|
1672 | FREETMPS; |
---|
1673 | LEAVE; |
---|
1674 | if (PL_curcop == &PL_compiling) |
---|
1675 | PL_curcop->op_private = (U8)(PL_hints & HINT_PRIVATE_MASK); |
---|
1676 | |
---|
1677 | svp = hv_store(hv, (char*)ptr, klen, retval, 0); |
---|
1678 | |
---|
1679 | if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || (slen << 3) < needents) |
---|
1680 | Perl_croak(aTHX_ "SWASHGET didn't return result of proper length"); |
---|
1681 | } |
---|
1682 | |
---|
1683 | PL_last_swash_hv = hv; |
---|
1684 | PL_last_swash_klen = klen; |
---|
1685 | PL_last_swash_tmps = tmps; |
---|
1686 | PL_last_swash_slen = slen; |
---|
1687 | if (klen) |
---|
1688 | Copy(ptr, PL_last_swash_key, klen, U8); |
---|
1689 | } |
---|
1690 | |
---|
1691 | switch ((int)((slen << 3) / needents)) { |
---|
1692 | case 1: |
---|
1693 | bit = 1 << (off & 7); |
---|
1694 | off >>= 3; |
---|
1695 | return (tmps[off] & bit) != 0; |
---|
1696 | case 8: |
---|
1697 | return tmps[off]; |
---|
1698 | case 16: |
---|
1699 | off <<= 1; |
---|
1700 | return (tmps[off] << 8) + tmps[off + 1] ; |
---|
1701 | case 32: |
---|
1702 | off <<= 2; |
---|
1703 | return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ; |
---|
1704 | } |
---|
1705 | Perl_croak(aTHX_ "panic: swash_fetch"); |
---|
1706 | return 0; |
---|
1707 | } |
---|
1708 | |
---|
1709 | |
---|
1710 | /* |
---|
1711 | =for apidoc A|U8 *|uvchr_to_utf8|U8 *d|UV uv |
---|
1712 | |
---|
1713 | Adds the UTF8 representation of the Native codepoint C<uv> to the end |
---|
1714 | of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free |
---|
1715 | bytes available. The return value is the pointer to the byte after the |
---|
1716 | end of the new character. In other words, |
---|
1717 | |
---|
1718 | d = uvchr_to_utf8(d, uv); |
---|
1719 | |
---|
1720 | is the recommended wide native character-aware way of saying |
---|
1721 | |
---|
1722 | *(d++) = uv; |
---|
1723 | |
---|
1724 | =cut |
---|
1725 | */ |
---|
1726 | |
---|
1727 | /* On ASCII machines this is normally a macro but we want a |
---|
1728 | real function in case XS code wants it |
---|
1729 | */ |
---|
1730 | #undef Perl_uvchr_to_utf8 |
---|
1731 | U8 * |
---|
1732 | Perl_uvchr_to_utf8(pTHX_ U8 *d, UV uv) |
---|
1733 | { |
---|
1734 | return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), 0); |
---|
1735 | } |
---|
1736 | |
---|
1737 | U8 * |
---|
1738 | Perl_uvchr_to_utf8_flags(pTHX_ U8 *d, UV uv, UV flags) |
---|
1739 | { |
---|
1740 | return Perl_uvuni_to_utf8_flags(aTHX_ d, NATIVE_TO_UNI(uv), flags); |
---|
1741 | } |
---|
1742 | |
---|
1743 | /* |
---|
1744 | =for apidoc A|UV|utf8n_to_uvchr|U8 *s|STRLEN curlen|STRLEN *retlen|U32 flags |
---|
1745 | |
---|
1746 | Returns the native character value of the first character in the string C<s> |
---|
1747 | which is assumed to be in UTF8 encoding; C<retlen> will be set to the |
---|
1748 | length, in bytes, of that character. |
---|
1749 | |
---|
1750 | Allows length and flags to be passed to low level routine. |
---|
1751 | |
---|
1752 | =cut |
---|
1753 | */ |
---|
1754 | /* On ASCII machines this is normally a macro but we want |
---|
1755 | a real function in case XS code wants it |
---|
1756 | */ |
---|
1757 | #undef Perl_utf8n_to_uvchr |
---|
1758 | UV |
---|
1759 | Perl_utf8n_to_uvchr(pTHX_ U8 *s, STRLEN curlen, STRLEN *retlen, U32 flags) |
---|
1760 | { |
---|
1761 | UV uv = Perl_utf8n_to_uvuni(aTHX_ s, curlen, retlen, flags); |
---|
1762 | return UNI_TO_NATIVE(uv); |
---|
1763 | } |
---|
1764 | |
---|
1765 | /* |
---|
1766 | =for apidoc A|char *|pv_uni_display|SV *dsv|U8 *spv|STRLEN len|STRLEN pvlim|UV flags |
---|
1767 | |
---|
1768 | Build to the scalar dsv a displayable version of the string spv, |
---|
1769 | length len, the displayable version being at most pvlim bytes long |
---|
1770 | (if longer, the rest is truncated and "..." will be appended). |
---|
1771 | |
---|
1772 | The flags argument can have UNI_DISPLAY_ISPRINT set to display |
---|
1773 | isPRINT()able characters as themselves, UNI_DISPLAY_BACKSLASH |
---|
1774 | to display the \\[nrfta\\] as the backslashed versions (like '\n') |
---|
1775 | (UNI_DISPLAY_BACKSLASH is preferred over UNI_DISPLAY_ISPRINT for \\). |
---|
1776 | UNI_DISPLAY_QQ (and its alias UNI_DISPLAY_REGEX) have both |
---|
1777 | UNI_DISPLAY_BACKSLASH and UNI_DISPLAY_ISPRINT turned on. |
---|
1778 | |
---|
1779 | The pointer to the PV of the dsv is returned. |
---|
1780 | |
---|
1781 | =cut */ |
---|
1782 | char * |
---|
1783 | Perl_pv_uni_display(pTHX_ SV *dsv, U8 *spv, STRLEN len, STRLEN pvlim, UV flags) |
---|
1784 | { |
---|
1785 | int truncated = 0; |
---|
1786 | char *s, *e; |
---|
1787 | |
---|
1788 | sv_setpvn(dsv, "", 0); |
---|
1789 | for (s = (char *)spv, e = s + len; s < e; s += UTF8SKIP(s)) { |
---|
1790 | UV u; |
---|
1791 | bool ok = FALSE; |
---|
1792 | |
---|
1793 | if (pvlim && SvCUR(dsv) >= pvlim) { |
---|
1794 | truncated++; |
---|
1795 | break; |
---|
1796 | } |
---|
1797 | u = utf8_to_uvchr((U8*)s, 0); |
---|
1798 | if (u < 256) { |
---|
1799 | if (!ok && (flags & UNI_DISPLAY_BACKSLASH)) { |
---|
1800 | switch (u & 0xFF) { |
---|
1801 | case '\n': |
---|
1802 | Perl_sv_catpvf(aTHX_ dsv, "\\n"); ok = TRUE; break; |
---|
1803 | case '\r': |
---|
1804 | Perl_sv_catpvf(aTHX_ dsv, "\\r"); ok = TRUE; break; |
---|
1805 | case '\t': |
---|
1806 | Perl_sv_catpvf(aTHX_ dsv, "\\t"); ok = TRUE; break; |
---|
1807 | case '\f': |
---|
1808 | Perl_sv_catpvf(aTHX_ dsv, "\\f"); ok = TRUE; break; |
---|
1809 | case '\a': |
---|
1810 | Perl_sv_catpvf(aTHX_ dsv, "\\a"); ok = TRUE; break; |
---|
1811 | case '\\': |
---|
1812 | Perl_sv_catpvf(aTHX_ dsv, "\\\\" ); ok = TRUE; break; |
---|
1813 | default: break; |
---|
1814 | } |
---|
1815 | } |
---|
1816 | /* isPRINT() is the locale-blind version. */ |
---|
1817 | if (!ok && (flags & UNI_DISPLAY_ISPRINT) && isPRINT(u & 0xFF)) { |
---|
1818 | Perl_sv_catpvf(aTHX_ dsv, "%c", (char)(u & 0xFF)); |
---|
1819 | ok = TRUE; |
---|
1820 | } |
---|
1821 | } |
---|
1822 | if (!ok) |
---|
1823 | Perl_sv_catpvf(aTHX_ dsv, "\\x{%"UVxf"}", u); |
---|
1824 | } |
---|
1825 | if (truncated) |
---|
1826 | sv_catpvn(dsv, "...", 3); |
---|
1827 | |
---|
1828 | return SvPVX(dsv); |
---|
1829 | } |
---|
1830 | |
---|
1831 | /* |
---|
1832 | =for apidoc A|char *|sv_uni_display|SV *dsv|SV *ssv|STRLEN pvlim|UV flags |
---|
1833 | |
---|
1834 | Build to the scalar dsv a displayable version of the scalar sv, |
---|
1835 | the displayable version being at most pvlim bytes long |
---|
1836 | (if longer, the rest is truncated and "..." will be appended). |
---|
1837 | |
---|
1838 | The flags argument is as in pv_uni_display(). |
---|
1839 | |
---|
1840 | The pointer to the PV of the dsv is returned. |
---|
1841 | |
---|
1842 | =cut */ |
---|
1843 | char * |
---|
1844 | Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim, UV flags) |
---|
1845 | { |
---|
1846 | return Perl_pv_uni_display(aTHX_ dsv, (U8*)SvPVX(ssv), SvCUR(ssv), |
---|
1847 | pvlim, flags); |
---|
1848 | } |
---|
1849 | |
---|
1850 | /* |
---|
1851 | =for apidoc A|I32|ibcmp_utf8|const char *s1|char **pe1|register UV l1|bool u1|const char *s2|char **pe2|register UV l2|bool u2 |
---|
1852 | |
---|
1853 | Return true if the strings s1 and s2 differ case-insensitively, false |
---|
1854 | if not (if they are equal case-insensitively). If u1 is true, the |
---|
1855 | string s1 is assumed to be in UTF-8-encoded Unicode. If u2 is true, |
---|
1856 | the string s2 is assumed to be in UTF-8-encoded Unicode. If u1 or u2 |
---|
1857 | are false, the respective string is assumed to be in native 8-bit |
---|
1858 | encoding. |
---|
1859 | |
---|
1860 | If the pe1 and pe2 are non-NULL, the scanning pointers will be copied |
---|
1861 | in there (they will point at the beginning of the I<next> character). |
---|
1862 | If the pointers behind pe1 or pe2 are non-NULL, they are the end |
---|
1863 | pointers beyond which scanning will not continue under any |
---|
1864 | circustances. If the byte lengths l1 and l2 are non-zero, s1+l1 and |
---|
1865 | s2+l2 will be used as goal end pointers that will also stop the scan, |
---|
1866 | and which qualify towards defining a successful match: all the scans |
---|
1867 | that define an explicit length must reach their goal pointers for |
---|
1868 | a match to succeed). |
---|
1869 | |
---|
1870 | For case-insensitiveness, the "casefolding" of Unicode is used |
---|
1871 | instead of upper/lowercasing both the characters, see |
---|
1872 | http://www.unicode.org/unicode/reports/tr21/ (Case Mappings). |
---|
1873 | |
---|
1874 | =cut */ |
---|
1875 | I32 |
---|
1876 | Perl_ibcmp_utf8(pTHX_ const char *s1, char **pe1, register UV l1, bool u1, const char *s2, char **pe2, register UV l2, bool u2) |
---|
1877 | { |
---|
1878 | register U8 *p1 = (U8*)s1; |
---|
1879 | register U8 *p2 = (U8*)s2; |
---|
1880 | register U8 *e1 = 0, *f1 = 0, *q1 = 0; |
---|
1881 | register U8 *e2 = 0, *f2 = 0, *q2 = 0; |
---|
1882 | STRLEN n1 = 0, n2 = 0; |
---|
1883 | U8 foldbuf1[UTF8_MAXLEN_FOLD+1]; |
---|
1884 | U8 foldbuf2[UTF8_MAXLEN_FOLD+1]; |
---|
1885 | U8 natbuf[1+1]; |
---|
1886 | STRLEN foldlen1, foldlen2; |
---|
1887 | bool match; |
---|
1888 | |
---|
1889 | if (pe1) |
---|
1890 | e1 = *(U8**)pe1; |
---|
1891 | if (e1 == 0 || (l1 && l1 < (UV)(e1 - (U8*)s1))) |
---|
1892 | f1 = (U8*)s1 + l1; |
---|
1893 | if (pe2) |
---|
1894 | e2 = *(U8**)pe2; |
---|
1895 | if (e2 == 0 || (l2 && l2 < (UV)(e2 - (U8*)s2))) |
---|
1896 | f2 = (U8*)s2 + l2; |
---|
1897 | |
---|
1898 | if ((e1 == 0 && f1 == 0) || (e2 == 0 && f2 == 0) || (f1 == 0 && f2 == 0)) |
---|
1899 | return 1; /* mismatch; possible infinite loop or false positive */ |
---|
1900 | |
---|
1901 | if (!u1 || !u2) |
---|
1902 | natbuf[1] = 0; /* Need to terminate the buffer. */ |
---|
1903 | |
---|
1904 | while ((e1 == 0 || p1 < e1) && |
---|
1905 | (f1 == 0 || p1 < f1) && |
---|
1906 | (e2 == 0 || p2 < e2) && |
---|
1907 | (f2 == 0 || p2 < f2)) { |
---|
1908 | if (n1 == 0) { |
---|
1909 | if (u1) |
---|
1910 | to_utf8_fold(p1, foldbuf1, &foldlen1); |
---|
1911 | else { |
---|
1912 | natbuf[0] = *p1; |
---|
1913 | to_utf8_fold(natbuf, foldbuf1, &foldlen1); |
---|
1914 | } |
---|
1915 | q1 = foldbuf1; |
---|
1916 | n1 = foldlen1; |
---|
1917 | } |
---|
1918 | if (n2 == 0) { |
---|
1919 | if (u2) |
---|
1920 | to_utf8_fold(p2, foldbuf2, &foldlen2); |
---|
1921 | else { |
---|
1922 | natbuf[0] = *p2; |
---|
1923 | to_utf8_fold(natbuf, foldbuf2, &foldlen2); |
---|
1924 | } |
---|
1925 | q2 = foldbuf2; |
---|
1926 | n2 = foldlen2; |
---|
1927 | } |
---|
1928 | while (n1 && n2) { |
---|
1929 | if ( UTF8SKIP(q1) != UTF8SKIP(q2) || |
---|
1930 | (UTF8SKIP(q1) == 1 && *q1 != *q2) || |
---|
1931 | memNE((char*)q1, (char*)q2, UTF8SKIP(q1)) ) |
---|
1932 | return 1; /* mismatch */ |
---|
1933 | n1 -= UTF8SKIP(q1); |
---|
1934 | q1 += UTF8SKIP(q1); |
---|
1935 | n2 -= UTF8SKIP(q2); |
---|
1936 | q2 += UTF8SKIP(q2); |
---|
1937 | } |
---|
1938 | if (n1 == 0) |
---|
1939 | p1 += u1 ? UTF8SKIP(p1) : 1; |
---|
1940 | if (n2 == 0) |
---|
1941 | p2 += u2 ? UTF8SKIP(p2) : 1; |
---|
1942 | |
---|
1943 | } |
---|
1944 | |
---|
1945 | /* A match is defined by all the scans that specified |
---|
1946 | * an explicit length reaching their final goals. */ |
---|
1947 | match = (f1 == 0 || p1 == f1) && (f2 == 0 || p2 == f2); |
---|
1948 | |
---|
1949 | if (match) { |
---|
1950 | if (pe1) |
---|
1951 | *pe1 = (char*)p1; |
---|
1952 | if (pe2) |
---|
1953 | *pe2 = (char*)p2; |
---|
1954 | } |
---|
1955 | |
---|
1956 | return match ? 0 : 1; /* 0 match, 1 mismatch */ |
---|
1957 | } |
---|
1958 | |
---|