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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" |
9 | |
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10 | START_EXTERN_C |
11 | |
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12 | extern regexp* my_regcomp (pTHX_ char* exp, char* xend, PMOP* pm); |
13 | extern I32 my_regexec (pTHX_ regexp* prog, char* stringarg, char* strend, |
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14 | char* strbeg, I32 minend, SV* screamer, |
15 | void* data, U32 flags); |
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16 | extern void my_regfree (pTHX_ struct regexp* r); |
17 | extern char* my_re_intuit_start (pTHX_ regexp *prog, SV *sv, char *strpos, |
18 | char *strend, U32 flags, |
19 | struct re_scream_pos_data_s *data); |
20 | extern SV* my_re_intuit_string (pTHX_ regexp *prog); |
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21 | |
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22 | extern regexp* my_regdupe (pTHX_ regexp *r, CLONE_PARAMS *param); |
23 | |
24 | |
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25 | END_EXTERN_C |
26 | |
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27 | /* engine details need to be paired - non debugging, debuggin */ |
28 | #define NEEDS_DEBUGGING 0x01 |
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29 | struct regexp_engine { |
30 | regexp* (*regcomp) (pTHX_ char* exp, char* xend, PMOP* pm); |
31 | I32 (*regexec) (pTHX_ regexp* prog, char* stringarg, char* strend, |
32 | char* strbeg, I32 minend, SV* screamer, |
33 | void* data, U32 flags); |
34 | char* (*re_intuit_start) (pTHX_ regexp *prog, SV *sv, char *strpos, |
35 | char *strend, U32 flags, |
36 | struct re_scream_pos_data_s *data); |
37 | SV* (*re_intuit_string) (pTHX_ regexp *prog); |
38 | void (*regfree) (pTHX_ struct regexp* r); |
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39 | regexp* (*regdupe) (pTHX_ regexp *r, CLONE_PARAMS *param); |
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40 | }; |
41 | |
42 | struct regexp_engine engines[] = { |
43 | { Perl_pregcomp, Perl_regexec_flags, Perl_re_intuit_start, |
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44 | Perl_re_intuit_string, Perl_pregfree, Perl_regdupe }, |
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45 | { my_regcomp, my_regexec, my_re_intuit_start, my_re_intuit_string, |
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46 | my_regfree, my_regdupe } |
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47 | }; |
48 | |
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49 | #define MY_CXT_KEY "re::_guts" XS_VERSION |
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50 | |
51 | typedef struct { |
52 | int x_oldflag; /* debug flag */ |
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53 | unsigned int x_state; |
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54 | } my_cxt_t; |
55 | |
56 | START_MY_CXT |
57 | |
58 | #define oldflag (MY_CXT.x_oldflag) |
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59 | |
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60 | static void |
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61 | install(pTHX_ unsigned int new_state) |
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62 | { |
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63 | dMY_CXT; |
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64 | const unsigned int states |
65 | = sizeof(engines) / sizeof(struct regexp_engine) -1; |
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66 | if(new_state == MY_CXT.x_state) |
67 | return; |
68 | |
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69 | if (new_state > states) { |
70 | Perl_croak(aTHX_ "panic: re::install state %u is illegal - max is %u", |
71 | new_state, states); |
72 | } |
73 | |
74 | PL_regexecp = engines[new_state].regexec; |
75 | PL_regcompp = engines[new_state].regcomp; |
76 | PL_regint_start = engines[new_state].re_intuit_start; |
77 | PL_regint_string = engines[new_state].re_intuit_string; |
78 | PL_regfree = engines[new_state].regfree; |
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79 | PL_regdupe = engines[new_state].regdupe; |
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80 | |
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81 | if (new_state & NEEDS_DEBUGGING) { |
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82 | PL_colorset = 0; /* Allow reinspection of ENV. */ |
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83 | if (!(MY_CXT.x_state & NEEDS_DEBUGGING)) { |
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84 | /* Debugging is turned on for the first time. */ |
85 | oldflag = PL_debug & DEBUG_r_FLAG; |
86 | PL_debug |= DEBUG_r_FLAG; |
87 | } |
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88 | } else { |
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89 | if (!(MY_CXT.x_state & NEEDS_DEBUGGING)) { |
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90 | if (!oldflag) |
91 | PL_debug &= ~DEBUG_r_FLAG; |
92 | } |
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93 | } |
94 | |
95 | MY_CXT.x_state = new_state; |
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96 | } |
97 | |
98 | MODULE = re PACKAGE = re |
99 | |
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100 | BOOT: |
101 | { |
102 | MY_CXT_INIT; |
103 | } |
104 | |
105 | |
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106 | void |
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107 | install(new_state) |
108 | unsigned int new_state; |
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109 | CODE: |
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110 | install(aTHX_ new_state); |