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1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
4 | |
5 | #ifdef NULL |
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6 | #undef NULL /* XXX Why? */ |
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7 | #endif |
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8 | #ifdef I_DBM |
9 | # include <dbm.h> |
10 | #else |
11 | # ifdef I_RPCSVC_DBM |
12 | # include <rpcsvc/dbm.h> |
13 | # endif |
14 | #endif |
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15 | |
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16 | #ifdef DBM_BUG_DUPLICATE_FREE |
17 | /* |
18 | * DBM on at least Ultrix and HPUX call dbmclose() from dbminit(), |
19 | * resulting in duplicate free() because dbmclose() does *not* |
20 | * check if it has already been called for this DBM. |
21 | * If some malloc/free calls have been done between dbmclose() and |
22 | * the next dbminit(), the memory might be used for something else when |
23 | * it is freed. |
24 | * Verified to work on ultrix4.3. Probably will work on HP/UX. |
25 | * Set DBM_BUG_DUPLICATE_FREE in the extension hint file. |
26 | */ |
27 | /* Close the previous dbm, and fail to open a new dbm */ |
28 | #define dbmclose() ((void) dbminit("/tmp/x/y/z/z/y")) |
29 | #endif |
30 | |
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31 | #include <fcntl.h> |
32 | |
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33 | typedef struct { |
34 | void * dbp ; |
35 | SV * filter_fetch_key ; |
36 | SV * filter_store_key ; |
37 | SV * filter_fetch_value ; |
38 | SV * filter_store_value ; |
39 | int filtering ; |
40 | } ODBM_File_type; |
41 | |
42 | typedef ODBM_File_type * ODBM_File ; |
43 | typedef datum datum_key ; |
44 | typedef datum datum_value ; |
45 | |
46 | #define ckFilter(arg,type,name) \ |
47 | if (db->type) { \ |
48 | SV * save_defsv ; \ |
49 | /* printf("filtering %s\n", name) ;*/ \ |
50 | if (db->filtering) \ |
51 | croak("recursion detected in %s", name) ; \ |
52 | db->filtering = TRUE ; \ |
53 | save_defsv = newSVsv(DEFSV) ; \ |
54 | sv_setsv(DEFSV, arg) ; \ |
55 | PUSHMARK(sp) ; \ |
56 | (void) perl_call_sv(db->type, G_DISCARD|G_NOARGS); \ |
57 | sv_setsv(arg, DEFSV) ; \ |
58 | sv_setsv(DEFSV, save_defsv) ; \ |
59 | SvREFCNT_dec(save_defsv) ; \ |
60 | db->filtering = FALSE ; \ |
61 | /*printf("end of filtering %s\n", name) ;*/ \ |
62 | } |
63 | |
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64 | |
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65 | #define odbm_FETCH(db,key) fetch(key) |
66 | #define odbm_STORE(db,key,value,flags) store(key,value) |
67 | #define odbm_DELETE(db,key) delete(key) |
68 | #define odbm_FIRSTKEY(db) firstkey() |
69 | #define odbm_NEXTKEY(db,key) nextkey(key) |
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70 | |
71 | static int dbmrefcnt; |
72 | |
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73 | #ifndef DBM_REPLACE |
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74 | #define DBM_REPLACE 0 |
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75 | #endif |
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76 | |
77 | MODULE = ODBM_File PACKAGE = ODBM_File PREFIX = odbm_ |
78 | |
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79 | #ifndef NULL |
80 | # define NULL 0 |
81 | #endif |
82 | |
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83 | ODBM_File |
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84 | odbm_TIEHASH(dbtype, filename, flags, mode) |
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85 | char * dbtype |
86 | char * filename |
87 | int flags |
88 | int mode |
89 | CODE: |
90 | { |
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91 | char *tmpbuf; |
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92 | void * dbp ; |
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93 | if (dbmrefcnt++) |
94 | croak("Old dbm can only open one database"); |
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95 | New(0, tmpbuf, strlen(filename) + 5, char); |
96 | SAVEFREEPV(tmpbuf); |
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97 | sprintf(tmpbuf,"%s.dir",filename); |
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98 | if (stat(tmpbuf, &PL_statbuf) < 0) { |
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99 | if (flags & O_CREAT) { |
100 | if (mode < 0 || close(creat(tmpbuf,mode)) < 0) |
101 | croak("ODBM_File: Can't create %s", filename); |
102 | sprintf(tmpbuf,"%s.pag",filename); |
103 | if (close(creat(tmpbuf,mode)) < 0) |
104 | croak("ODBM_File: Can't create %s", filename); |
105 | } |
106 | else |
107 | croak("ODBM_FILE: Can't open %s", filename); |
108 | } |
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109 | dbp = (void*)(dbminit(filename) >= 0 ? &dbmrefcnt : 0); |
110 | RETVAL = (ODBM_File)safemalloc(sizeof(ODBM_File_type)) ; |
111 | Zero(RETVAL, 1, ODBM_File_type) ; |
112 | RETVAL->dbp = dbp ; |
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113 | ST(0) = sv_mortalcopy(&PL_sv_undef); |
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114 | sv_setptrobj(ST(0), RETVAL, dbtype); |
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115 | } |
116 | |
117 | void |
118 | DESTROY(db) |
119 | ODBM_File db |
120 | CODE: |
121 | dbmrefcnt--; |
122 | dbmclose(); |
123 | |
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124 | datum_value |
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125 | odbm_FETCH(db, key) |
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126 | ODBM_File db |
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127 | datum_key key |
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128 | |
129 | int |
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130 | odbm_STORE(db, key, value, flags = DBM_REPLACE) |
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131 | ODBM_File db |
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132 | datum_key key |
133 | datum_value value |
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134 | int flags |
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135 | CLEANUP: |
136 | if (RETVAL) { |
137 | if (RETVAL < 0 && errno == EPERM) |
138 | croak("No write permission to odbm file"); |
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139 | croak("odbm store returned %d, errno %d, key \"%s\"", |
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140 | RETVAL,errno,key.dptr); |
141 | } |
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142 | |
143 | int |
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144 | odbm_DELETE(db, key) |
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145 | ODBM_File db |
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146 | datum_key key |
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147 | |
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148 | datum_key |
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149 | odbm_FIRSTKEY(db) |
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150 | ODBM_File db |
151 | |
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152 | datum_key |
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153 | odbm_NEXTKEY(db, key) |
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154 | ODBM_File db |
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155 | datum_key key |
156 | |
157 | |
158 | #define setFilter(type) \ |
159 | { \ |
160 | if (db->type) \ |
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161 | RETVAL = sv_mortalcopy(db->type) ; \ |
162 | ST(0) = RETVAL ; \ |
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163 | if (db->type && (code == &PL_sv_undef)) { \ |
164 | SvREFCNT_dec(db->type) ; \ |
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165 | db->type = Nullsv ; \ |
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166 | } \ |
167 | else if (code) { \ |
168 | if (db->type) \ |
169 | sv_setsv(db->type, code) ; \ |
170 | else \ |
171 | db->type = newSVsv(code) ; \ |
172 | } \ |
173 | } |
174 | |
175 | |
176 | |
177 | SV * |
178 | filter_fetch_key(db, code) |
179 | ODBM_File db |
180 | SV * code |
181 | SV * RETVAL = &PL_sv_undef ; |
182 | CODE: |
183 | setFilter(filter_fetch_key) ; |
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184 | |
185 | SV * |
186 | filter_store_key(db, code) |
187 | ODBM_File db |
188 | SV * code |
189 | SV * RETVAL = &PL_sv_undef ; |
190 | CODE: |
191 | setFilter(filter_store_key) ; |
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192 | |
193 | SV * |
194 | filter_fetch_value(db, code) |
195 | ODBM_File db |
196 | SV * code |
197 | SV * RETVAL = &PL_sv_undef ; |
198 | CODE: |
199 | setFilter(filter_fetch_value) ; |
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200 | |
201 | SV * |
202 | filter_store_value(db, code) |
203 | ODBM_File db |
204 | SV * code |
205 | SV * RETVAL = &PL_sv_undef ; |
206 | CODE: |
207 | setFilter(filter_store_value) ; |
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208 | |