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annotate perl-5.22.2/op_reg_common.h @ 8045:a16537d2fe07

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<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author HackBot
date Sat, 14 May 2016 14:54:38 +0000
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8045
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1 /* op_reg_common.h
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2 *
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3 * Definitions common to by op.h and regexp.h
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4 *
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5 * Copyright (C) 2010, 2011 by Larry Wall and others
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6 *
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7 * You may distribute under the terms of either the GNU General Public
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8 * License or the Artistic License, as specified in the README file.
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9 *
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10 */
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11
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12 /* These defines are used in both op.h and regexp.h The definitions use the
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13 * shift form so that ext/B/Makefile.PL will pick them up.
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14 *
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15 * Data structures used in the two headers have common fields, and in fact one
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16 * is copied onto the other. This makes it easy to keep them in sync */
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17
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18 /* This tells where the first of these bits is. Setting it to 0 saved cycles
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19 * and memory. I (khw) think the code will work if changed back, but haven't
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20 * tested it */
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21 /* Make sure to update ext/re/re.pm when changing this! */
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22 #ifndef RXf_PMf_STD_PMMOD_SHIFT /* Only expand #include of this file once */
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23
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24 #define RXf_PMf_STD_PMMOD_SHIFT 0
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25
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26 /* The bits need to be ordered so that the msixn are contiguous starting at bit
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27 * RXf_PMf_STD_PMMOD_SHIFT, followed by the p. See STD_PAT_MODS and
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28 * INT_PAT_MODS in regexp.h for the reason contiguity is needed */
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29 /* Make sure to update lib/re.pm when changing these! */
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30 /* Make sure you keep the pure PMf_ versions below in sync */
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31 #define RXf_PMf_MULTILINE (1U << (RXf_PMf_STD_PMMOD_SHIFT+0)) /* /m */
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32 #define RXf_PMf_SINGLELINE (1U << (RXf_PMf_STD_PMMOD_SHIFT+1)) /* /s */
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33 #define RXf_PMf_FOLD (1U << (RXf_PMf_STD_PMMOD_SHIFT+2)) /* /i */
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34 #define RXf_PMf_EXTENDED (1U << (RXf_PMf_STD_PMMOD_SHIFT+3)) /* /x */
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35 #define RXf_PMf_EXTENDED_MORE (1U << (RXf_PMf_STD_PMMOD_SHIFT+4)) /* /xx */
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36 #define RXf_PMf_NOCAPTURE (1U << (RXf_PMf_STD_PMMOD_SHIFT+5)) /* /n */
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37
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38 #define RXf_PMf_KEEPCOPY (1U << (RXf_PMf_STD_PMMOD_SHIFT+6)) /* /p */
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39
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40 /* The character set for the regex is stored in a field of more than one bit
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41 * using an enum, for reasons of compactness and to ensure that the options are
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42 * mutually exclusive */
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43 /* Make sure to update ext/re/re.pm and regcomp.sym (as these are used as
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44 * offsets for various node types, like POSIXD vs POSIXL, etc) when changing
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45 * this! */
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46 typedef enum {
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47 REGEX_DEPENDS_CHARSET = 0,
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48 REGEX_LOCALE_CHARSET,
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49 REGEX_UNICODE_CHARSET,
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50 REGEX_ASCII_RESTRICTED_CHARSET,
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51 REGEX_ASCII_MORE_RESTRICTED_CHARSET
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52 } regex_charset;
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53
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54 #define _RXf_PMf_CHARSET_SHIFT ((RXf_PMf_STD_PMMOD_SHIFT)+7)
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55 #define RXf_PMf_CHARSET (7U << (_RXf_PMf_CHARSET_SHIFT)) /* 3 bits */
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56
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57 /* Manually decorate these functions here with gcc-style attributes just to
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58 * avoid making the regex_charset typedef global, which it would need to be for
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59 * proto.h to understand it */
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60 PERL_STATIC_INLINE void
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61 set_regex_charset(U32 * const flags, const regex_charset cs)
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62 __attribute__nonnull__(1);
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63
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64 PERL_STATIC_INLINE void
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65 set_regex_charset(U32 * const flags, const regex_charset cs)
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66 {
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67 /* Sets the character set portion of 'flags' to 'cs', which is a member of
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68 * the above enum */
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69
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70 *flags &= ~RXf_PMf_CHARSET;
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71 *flags |= (cs << _RXf_PMf_CHARSET_SHIFT);
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72 }
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73
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74 PERL_STATIC_INLINE regex_charset
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75 get_regex_charset(const U32 flags)
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76 __attribute__warn_unused_result__;
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77
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78 PERL_STATIC_INLINE regex_charset
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79 get_regex_charset(const U32 flags)
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80 {
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81 /* Returns the enum corresponding to the character set in 'flags' */
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82
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83 return (regex_charset) ((flags & RXf_PMf_CHARSET) >> _RXf_PMf_CHARSET_SHIFT);
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84 }
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85
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86 #define RXf_PMf_STRICT (1U<<(RXf_PMf_STD_PMMOD_SHIFT+10))
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87
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88 #define _RXf_PMf_SHIFT_COMPILETIME (RXf_PMf_STD_PMMOD_SHIFT+11)
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89
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90
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91 /*
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92 Set in Perl_pmruntime if op_flags & OPf_SPECIAL, i.e. split. Will
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93 be used by regex engines to check whether they should set
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94 RXf_SKIPWHITE
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95 */
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96 #define RXf_PMf_SPLIT (1U<<(RXf_PMf_STD_PMMOD_SHIFT+11))
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97
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98 /* Next available bit after the above. Name begins with '_' so won't be
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99 * exported by B */
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100 #define _RXf_PMf_SHIFT_NEXT (RXf_PMf_STD_PMMOD_SHIFT+12)
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101
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102 /* Mask of the above bits. These need to be transferred from op_pmflags to
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103 * re->extflags during compilation */
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104 #define RXf_PMf_COMPILETIME (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_EXTENDED_MORE|RXf_PMf_KEEPCOPY|RXf_PMf_NOCAPTURE|RXf_PMf_CHARSET|RXf_PMf_STRICT)
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105 #define RXf_PMf_FLAGCOPYMASK (RXf_PMf_COMPILETIME|RXf_PMf_SPLIT)
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106
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107 #if 0 /* Temporary to get Jenkins happy again */
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108 See thread starting at http://nntp.perl.org/group/perl.perl5.porters/220710
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109 /* Exclude win32 because it can't cope with I32_MAX definition */
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110 #ifndef WIN32
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111 # if RXf_PMf_COMPILETIME > I32_MAX
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112 # error RXf_PMf_COMPILETIME wont fit in arg2 field of eval node
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113 # endif
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114 #endif
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115 #endif
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116
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117 /* These copies need to be numerical or ext/B/Makefile.PL won't think they are
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118 * constants */
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119 #define PMf_MULTILINE (1U<<0)
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120 #define PMf_SINGLELINE (1U<<1)
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121 #define PMf_FOLD (1U<<2)
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122 #define PMf_EXTENDED (1U<<3)
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123 #define PMf_EXTENDED_MORE (1U<<4)
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124 #define PMf_NOCAPTURE (1U<<5)
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125 #define PMf_KEEPCOPY (1U<<6)
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126 #define PMf_CHARSET (7U<<7)
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127 #define PMf_STRICT (1U<<10)
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128 #define PMf_SPLIT (1U<<11)
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129
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130 #if PMf_MULTILINE != RXf_PMf_MULTILINE || PMf_SINGLELINE != RXf_PMf_SINGLELINE || PMf_FOLD != RXf_PMf_FOLD || PMf_EXTENDED != RXf_PMf_EXTENDED || PMf_EXTENDED_MORE != RXf_PMf_EXTENDED_MORE || PMf_KEEPCOPY != RXf_PMf_KEEPCOPY || PMf_SPLIT != RXf_PMf_SPLIT || PMf_CHARSET != RXf_PMf_CHARSET || PMf_NOCAPTURE != RXf_PMf_NOCAPTURE || PMf_STRICT != RXf_PMf_STRICT
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131 # error RXf_PMf defines are wrong
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132 #endif
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133
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134 /* Error check that haven't left something out of this. This isn't done
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135 * directly in the #define because doing so confuses regcomp.pl.
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136 * (2**n - 1) is n 1 bits, so the below gets the contiguous bits between the
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137 * beginning and ending shifts */
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138 #if RXf_PMf_COMPILETIME != (((1 << (_RXf_PMf_SHIFT_COMPILETIME))-1) \
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139 & (~((1 << RXf_PMf_STD_PMMOD_SHIFT)-1)))
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140 # error RXf_PMf_COMPILETIME is invalid
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141 #endif
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142
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143 #endif /* Include only once */