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1 | #if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
2 | # define DEBUGGING |
3 | #endif |
4 | |
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5 | #define PERL_NO_GET_CONTEXT |
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6 | #include "EXTERN.h" |
7 | #include "perl.h" |
8 | #include "XSUB.h" |
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9 | #include "re_comp.h" |
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10 | |
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11 | |
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12 | START_EXTERN_C |
13 | |
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14 | extern REGEXP* my_re_compile (pTHX_ const SV * const pattern, const U32 pm_flags); |
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15 | extern I32 my_regexec (pTHX_ REGEXP * const prog, char* stringarg, char* strend, |
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16 | char* strbeg, I32 minend, SV* screamer, |
17 | void* data, U32 flags); |
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18 | |
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19 | extern char* my_re_intuit_start (pTHX_ REGEXP * const prog, SV *sv, char *strpos, |
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20 | char *strend, const U32 flags, |
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21 | struct re_scream_pos_data_s *data); |
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22 | extern SV* my_re_intuit_string (pTHX_ REGEXP * const prog); |
23 | |
24 | extern void my_regfree (pTHX_ REGEXP * const r); |
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25 | |
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26 | extern void my_reg_numbered_buff_fetch(pTHX_ REGEXP * const rx, const I32 paren, |
27 | SV * const usesv); |
28 | extern void my_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren, |
29 | SV const * const value); |
30 | extern I32 my_reg_numbered_buff_length(pTHX_ REGEXP * const rx, |
31 | const SV * const sv, const I32 paren); |
32 | |
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33 | extern SV* my_reg_named_buff(pTHX_ REGEXP * const, SV * const, SV * const, |
34 | const U32); |
35 | extern SV* my_reg_named_buff_iter(pTHX_ REGEXP * const rx, |
36 | const SV * const lastkey, const U32 flags); |
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37 | |
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38 | extern SV* my_reg_qr_package(pTHX_ REGEXP * const rx); |
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39 | #if defined(USE_ITHREADS) |
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40 | extern void* my_regdupe (pTHX_ REGEXP * const r, CLONE_PARAMS *param); |
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41 | #endif |
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42 | |
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43 | EXTERN_C const struct regexp_engine my_reg_engine; |
44 | |
45 | END_EXTERN_C |
46 | |
47 | const struct regexp_engine my_reg_engine = { |
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48 | my_re_compile, |
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49 | my_regexec, |
50 | my_re_intuit_start, |
51 | my_re_intuit_string, |
52 | my_regfree, |
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53 | my_reg_numbered_buff_fetch, |
54 | my_reg_numbered_buff_store, |
55 | my_reg_numbered_buff_length, |
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56 | my_reg_named_buff, |
57 | my_reg_named_buff_iter, |
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58 | my_reg_qr_package, |
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59 | #if defined(USE_ITHREADS) |
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60 | my_regdupe |
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61 | #endif |
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62 | }; |
63 | |
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64 | MODULE = re PACKAGE = re |
65 | |
66 | void |
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67 | install() |
68 | PPCODE: |
69 | PL_colorset = 0; /* Allow reinspection of ENV. */ |
70 | /* PL_debug |= DEBUG_r_FLAG; */ |
71 | XPUSHs(sv_2mortal(newSViv(PTR2IV(&my_reg_engine)))); |
72 | |
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73 | |
74 | void |
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75 | regexp_pattern(sv) |
76 | SV * sv |
77 | PROTOTYPE: $ |
78 | PREINIT: |
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79 | REGEXP *re; |
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80 | PPCODE: |
81 | { |
82 | /* |
83 | Checks if a reference is a regex or not. If the parameter is |
84 | not a ref, or is not the result of a qr// then returns false |
85 | in scalar context and an empty list in list context. |
86 | Otherwise in list context it returns the pattern and the |
87 | modifiers, in scalar context it returns the pattern just as it |
88 | would if the qr// was stringified normally, regardless as |
89 | to the class of the variable and any strigification overloads |
90 | on the object. |
91 | */ |
92 | |
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93 | if ((re = SvRX(sv))) /* assign deliberate */ |
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94 | { |
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95 | /* Housten, we have a regex! */ |
96 | SV *pattern; |
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97 | STRLEN patlen = 0; |
98 | STRLEN left = 0; |
99 | char reflags[6]; |
100 | |
101 | if ( GIMME_V == G_ARRAY ) { |
102 | /* |
103 | we are in list context so stringify |
104 | the modifiers that apply. We ignore "negative |
105 | modifiers" in this scenario. |
106 | */ |
107 | |
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108 | char *fptr = INT_PAT_MODS; |
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109 | char ch; |
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110 | U16 match_flags = (U16)((re->extflags & PMf_COMPILETIME) >> 12); |
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111 | |
112 | while((ch = *fptr++)) { |
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113 | if(match_flags & 1) { |
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114 | reflags[left++] = ch; |
115 | } |
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116 | match_flags >>= 1; |
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117 | } |
118 | |
119 | pattern = sv_2mortal(newSVpvn(re->precomp,re->prelen)); |
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120 | if (re->extflags & RXf_UTF8) SvUTF8_on(pattern); |
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121 | |
122 | /* return the pattern and the modifiers */ |
123 | XPUSHs(pattern); |
124 | XPUSHs(sv_2mortal(newSVpvn(reflags,left))); |
125 | XSRETURN(2); |
126 | } else { |
127 | /* Scalar, so use the string that Perl would return */ |
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128 | /* return the pattern in (?msix:..) format */ |
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129 | pattern = sv_2mortal(newSVpvn(re->wrapped,re->wraplen)); |
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130 | if (re->extflags & RXf_UTF8) |
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131 | SvUTF8_on(pattern); |
132 | XPUSHs(pattern); |
133 | XSRETURN(1); |
134 | } |
135 | } else { |
136 | /* It ain't a regexp folks */ |
137 | if ( GIMME_V == G_ARRAY ) { |
138 | /* return the empty list */ |
139 | XSRETURN_UNDEF; |
140 | } else { |
141 | /* Because of the (?:..) wrapping involved in a |
142 | stringified pattern it is impossible to get a |
143 | result for a real regexp that would evaluate to |
144 | false. Therefore we can return PL_sv_no to signify |
145 | that the object is not a regex, this means that one |
146 | can say |
147 | |
148 | if (regex($might_be_a_regex) eq '(?:foo)') { } |
149 | |
150 | and not worry about undefined values. |
151 | */ |
152 | XSRETURN_NO; |
153 | } |
154 | } |
155 | /* NOT-REACHED */ |
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156 | } |
157 | |
158 | |
159 | void |
160 | regmust(sv) |
161 | SV * sv |
162 | PROTOTYPE: $ |
163 | PREINIT: |
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164 | REGEXP *re; |
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165 | PPCODE: |
166 | { |
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167 | if ((re = SvRX(sv))) /* assign deliberate */ |
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168 | { |
169 | SV *an = &PL_sv_no; |
170 | SV *fl = &PL_sv_no; |
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171 | if (re->anchored_substr) { |
172 | an = newSVsv(re->anchored_substr); |
173 | } else if (re->anchored_utf8) { |
174 | an = newSVsv(re->anchored_utf8); |
175 | } |
176 | if (re->float_substr) { |
177 | fl = newSVsv(re->float_substr); |
178 | } else if (re->float_utf8) { |
179 | fl = newSVsv(re->float_utf8); |
180 | } |
181 | XPUSHs(an); |
182 | XPUSHs(fl); |
183 | XSRETURN(2); |
184 | } |
185 | XSRETURN_UNDEF; |
186 | } |
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187 | |