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1 | /* |
2 | * Filename : Call.xs |
3 | * |
4 | * Author : Paul Marquess |
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5 | * Date : 11th November 2001 |
6 | * Version : 1.06 |
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7 | * |
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8 | * Copyright (c) 1995-2001 Paul Marquess. All rights reserved. |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the same terms as Perl itself. |
11 | * |
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12 | */ |
13 | |
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14 | #define PERL_NO_GET_CONTEXT |
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15 | #include "EXTERN.h" |
16 | #include "perl.h" |
17 | #include "XSUB.h" |
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18 | #ifdef _NOT_CORE |
19 | # include "ppport.h" |
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20 | #endif |
21 | |
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22 | /* Internal defines */ |
23 | #define PERL_MODULE(s) IoBOTTOM_NAME(s) |
24 | #define PERL_OBJECT(s) IoTOP_GV(s) |
25 | #define FILTER_ACTIVE(s) IoLINES(s) |
26 | #define BUF_OFFSET(sv) IoPAGE_LEN(sv) |
27 | #define CODE_REF(sv) IoPAGE(sv) |
28 | |
29 | #define SET_LEN(sv,len) \ |
30 | do { SvPVX(sv)[len] = '\0'; SvCUR_set(sv, len); } while (0) |
31 | |
32 | |
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33 | /* Global Data */ |
34 | |
35 | #define MY_CXT_KEY "Filter::Util::Call::_guts" XS_VERSION |
36 | |
37 | typedef struct { |
38 | int x_fdebug ; |
39 | int x_current_idx ; |
40 | } my_cxt_t; |
41 | |
42 | START_MY_CXT |
43 | |
44 | #define fdebug (MY_CXT.x_fdebug) |
45 | #define current_idx (MY_CXT.x_current_idx) |
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46 | |
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47 | |
48 | static I32 |
49 | filter_call(pTHX_ int idx, SV *buf_sv, int maxlen) |
50 | { |
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51 | dMY_CXT; |
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52 | SV *my_sv = FILTER_DATA(idx); |
53 | char *nl = "\n"; |
54 | char *p; |
55 | char *out_ptr; |
56 | int n; |
57 | |
58 | if (fdebug) |
59 | warn("**** In filter_call - maxlen = %d, out len buf = %d idx = %d my_sv = %d [%s]\n", |
60 | maxlen, SvCUR(buf_sv), idx, SvCUR(my_sv), SvPVX(my_sv) ) ; |
61 | |
62 | while (1) { |
63 | |
64 | /* anything left from last time */ |
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65 | if ((n = SvCUR(my_sv))) { |
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66 | |
67 | out_ptr = SvPVX(my_sv) + BUF_OFFSET(my_sv) ; |
68 | |
69 | if (maxlen) { |
70 | /* want a block */ |
71 | if (fdebug) |
72 | warn("BLOCK(%d): size = %d, maxlen = %d\n", |
73 | idx, n, maxlen) ; |
74 | |
75 | sv_catpvn(buf_sv, out_ptr, maxlen > n ? n : maxlen ); |
76 | if(n <= maxlen) { |
77 | BUF_OFFSET(my_sv) = 0 ; |
78 | SET_LEN(my_sv, 0) ; |
79 | } |
80 | else { |
81 | BUF_OFFSET(my_sv) += maxlen ; |
82 | SvCUR_set(my_sv, n - maxlen) ; |
83 | } |
84 | return SvCUR(buf_sv); |
85 | } |
86 | else { |
87 | /* want lines */ |
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88 | if ((p = ninstr(out_ptr, out_ptr + n - 1, nl, nl))) { |
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89 | |
90 | sv_catpvn(buf_sv, out_ptr, p - out_ptr + 1); |
91 | |
92 | n = n - (p - out_ptr + 1); |
93 | BUF_OFFSET(my_sv) += (p - out_ptr + 1); |
94 | SvCUR_set(my_sv, n) ; |
95 | if (fdebug) |
96 | warn("recycle %d - leaving %d, returning %d [%s]", |
97 | idx, n, SvCUR(buf_sv), SvPVX(buf_sv)) ; |
98 | |
99 | return SvCUR(buf_sv); |
100 | } |
101 | else /* no EOL, so append the complete buffer */ |
102 | sv_catpvn(buf_sv, out_ptr, n) ; |
103 | } |
104 | |
105 | } |
106 | |
107 | |
108 | SET_LEN(my_sv, 0) ; |
109 | BUF_OFFSET(my_sv) = 0 ; |
110 | |
111 | if (FILTER_ACTIVE(my_sv)) |
112 | { |
113 | dSP ; |
114 | int count ; |
115 | |
116 | if (fdebug) |
117 | warn("gonna call %s::filter\n", PERL_MODULE(my_sv)) ; |
118 | |
119 | ENTER ; |
120 | SAVETMPS; |
121 | |
122 | SAVEINT(current_idx) ; /* save current idx */ |
123 | current_idx = idx ; |
124 | |
125 | SAVESPTR(DEFSV) ; /* save $_ */ |
126 | /* make $_ use our buffer */ |
127 | DEFSV = sv_2mortal(newSVpv("", 0)) ; |
128 | |
129 | PUSHMARK(sp) ; |
130 | |
131 | if (CODE_REF(my_sv)) { |
132 | /* if (SvROK(PERL_OBJECT(my_sv)) && SvTYPE(SvRV(PERL_OBJECT(my_sv))) == SVt_PVCV) { */ |
133 | count = perl_call_sv((SV*)PERL_OBJECT(my_sv), G_SCALAR); |
134 | } |
135 | else { |
136 | XPUSHs((SV*)PERL_OBJECT(my_sv)) ; |
137 | |
138 | PUTBACK ; |
139 | |
140 | count = perl_call_method("filter", G_SCALAR); |
141 | } |
142 | |
143 | SPAGAIN ; |
144 | |
145 | if (count != 1) |
146 | croak("Filter::Util::Call - %s::filter returned %d values, 1 was expected \n", |
147 | PERL_MODULE(my_sv), count ) ; |
148 | |
149 | n = POPi ; |
150 | |
151 | if (fdebug) |
152 | warn("status = %d, length op buf = %d [%s]\n", |
153 | n, SvCUR(DEFSV), SvPVX(DEFSV) ) ; |
154 | if (SvCUR(DEFSV)) |
155 | sv_setpvn(my_sv, SvPVX(DEFSV), SvCUR(DEFSV)) ; |
156 | |
157 | PUTBACK ; |
158 | FREETMPS ; |
159 | LEAVE ; |
160 | } |
161 | else |
162 | n = FILTER_READ(idx + 1, my_sv, maxlen) ; |
163 | |
164 | if (n <= 0) |
165 | { |
166 | /* Either EOF or an error */ |
167 | |
168 | if (fdebug) |
169 | warn ("filter_read %d returned %d , returning %d\n", idx, n, |
170 | (SvCUR(buf_sv)>0) ? SvCUR(buf_sv) : n); |
171 | |
172 | /* PERL_MODULE(my_sv) ; */ |
173 | /* PERL_OBJECT(my_sv) ; */ |
174 | filter_del(filter_call); |
175 | |
176 | /* If error, return the code */ |
177 | if (n < 0) |
178 | return n ; |
179 | |
180 | /* return what we have so far else signal eof */ |
181 | return (SvCUR(buf_sv)>0) ? SvCUR(buf_sv) : n; |
182 | } |
183 | |
184 | } |
185 | } |
186 | |
187 | |
188 | |
189 | MODULE = Filter::Util::Call PACKAGE = Filter::Util::Call |
190 | |
191 | REQUIRE: 1.924 |
192 | PROTOTYPES: ENABLE |
193 | |
194 | #define IDX current_idx |
195 | |
196 | int |
197 | filter_read(size=0) |
198 | int size |
199 | CODE: |
200 | { |
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201 | dMY_CXT; |
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202 | SV * buffer = DEFSV ; |
203 | |
204 | RETVAL = FILTER_READ(IDX + 1, buffer, size) ; |
205 | } |
206 | OUTPUT: |
207 | RETVAL |
208 | |
209 | |
210 | |
211 | |
212 | void |
213 | real_import(object, perlmodule, coderef) |
214 | SV * object |
215 | char * perlmodule |
216 | int coderef |
217 | PPCODE: |
218 | { |
219 | SV * sv = newSV(1) ; |
220 | |
221 | (void)SvPOK_only(sv) ; |
222 | filter_add(filter_call, sv) ; |
223 | |
224 | PERL_MODULE(sv) = savepv(perlmodule) ; |
225 | PERL_OBJECT(sv) = (GV*) newSVsv(object) ; |
226 | FILTER_ACTIVE(sv) = TRUE ; |
227 | BUF_OFFSET(sv) = 0 ; |
228 | CODE_REF(sv) = coderef ; |
229 | |
230 | SvCUR_set(sv, 0) ; |
231 | |
232 | } |
233 | |
234 | void |
235 | filter_del() |
236 | CODE: |
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237 | dMY_CXT; |
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238 | FILTER_ACTIVE(FILTER_DATA(IDX)) = FALSE ; |
239 | |
240 | |
241 | |
242 | void |
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243 | unimport(package="$Package", ...) |
244 | char *package |
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245 | PPCODE: |
246 | filter_del(filter_call); |
247 | |
248 | |
249 | BOOT: |
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250 | { |
251 | MY_CXT_INIT; |
252 | fdebug = 0; |
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253 | /* temporary hack to control debugging in toke.c */ |
254 | if (fdebug) |
255 | filter_add(NULL, (fdebug) ? (SV*)"1" : (SV*)"0"); |
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256 | } |
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257 | |
258 | |