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1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
4 | |
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5 | #ifdef I_DBM |
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6 | /* If using the DB3 emulation, ENTER is defined both |
7 | * by DB3 and Perl. We drop the Perl definition now. |
8 | * See also INSTALL section on DB3. |
9 | * -- Stanislav Brabec <utx@penguin.cz> */ |
10 | # undef ENTER |
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11 | # include <dbm.h> |
12 | #else |
13 | # ifdef I_RPCSVC_DBM |
14 | # include <rpcsvc/dbm.h> |
15 | # endif |
16 | #endif |
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17 | |
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18 | #ifdef DBM_BUG_DUPLICATE_FREE |
19 | /* |
20 | * DBM on at least Ultrix and HPUX call dbmclose() from dbminit(), |
21 | * resulting in duplicate free() because dbmclose() does *not* |
22 | * check if it has already been called for this DBM. |
23 | * If some malloc/free calls have been done between dbmclose() and |
24 | * the next dbminit(), the memory might be used for something else when |
25 | * it is freed. |
26 | * Verified to work on ultrix4.3. Probably will work on HP/UX. |
27 | * Set DBM_BUG_DUPLICATE_FREE in the extension hint file. |
28 | */ |
29 | /* Close the previous dbm, and fail to open a new dbm */ |
30 | #define dbmclose() ((void) dbminit("/tmp/x/y/z/z/y")) |
31 | #endif |
32 | |
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33 | #include <fcntl.h> |
34 | |
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35 | typedef struct { |
36 | void * dbp ; |
37 | SV * filter_fetch_key ; |
38 | SV * filter_store_key ; |
39 | SV * filter_fetch_value ; |
40 | SV * filter_store_value ; |
41 | int filtering ; |
42 | } ODBM_File_type; |
43 | |
44 | typedef ODBM_File_type * ODBM_File ; |
45 | typedef datum datum_key ; |
46 | typedef datum datum_value ; |
47 | |
48 | #define ckFilter(arg,type,name) \ |
49 | if (db->type) { \ |
50 | SV * save_defsv ; \ |
51 | /* printf("filtering %s\n", name) ;*/ \ |
52 | if (db->filtering) \ |
53 | croak("recursion detected in %s", name) ; \ |
54 | db->filtering = TRUE ; \ |
55 | save_defsv = newSVsv(DEFSV) ; \ |
56 | sv_setsv(DEFSV, arg) ; \ |
57 | PUSHMARK(sp) ; \ |
58 | (void) perl_call_sv(db->type, G_DISCARD|G_NOARGS); \ |
59 | sv_setsv(arg, DEFSV) ; \ |
60 | sv_setsv(DEFSV, save_defsv) ; \ |
61 | SvREFCNT_dec(save_defsv) ; \ |
62 | db->filtering = FALSE ; \ |
63 | /*printf("end of filtering %s\n", name) ;*/ \ |
64 | } |
65 | |
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66 | |
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67 | #define odbm_FETCH(db,key) fetch(key) |
68 | #define odbm_STORE(db,key,value,flags) store(key,value) |
69 | #define odbm_DELETE(db,key) delete(key) |
70 | #define odbm_FIRSTKEY(db) firstkey() |
71 | #define odbm_NEXTKEY(db,key) nextkey(key) |
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72 | |
73 | static int dbmrefcnt; |
74 | |
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75 | #ifndef DBM_REPLACE |
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76 | #define DBM_REPLACE 0 |
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77 | #endif |
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78 | |
79 | MODULE = ODBM_File PACKAGE = ODBM_File PREFIX = odbm_ |
80 | |
81 | ODBM_File |
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82 | odbm_TIEHASH(dbtype, filename, flags, mode) |
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83 | char * dbtype |
84 | char * filename |
85 | int flags |
86 | int mode |
87 | CODE: |
88 | { |
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89 | char *tmpbuf; |
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90 | void * dbp ; |
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91 | if (dbmrefcnt++) |
92 | croak("Old dbm can only open one database"); |
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93 | New(0, tmpbuf, strlen(filename) + 5, char); |
94 | SAVEFREEPV(tmpbuf); |
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95 | sprintf(tmpbuf,"%s.dir",filename); |
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96 | if (stat(tmpbuf, &PL_statbuf) < 0) { |
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97 | if (flags & O_CREAT) { |
98 | if (mode < 0 || close(creat(tmpbuf,mode)) < 0) |
99 | croak("ODBM_File: Can't create %s", filename); |
100 | sprintf(tmpbuf,"%s.pag",filename); |
101 | if (close(creat(tmpbuf,mode)) < 0) |
102 | croak("ODBM_File: Can't create %s", filename); |
103 | } |
104 | else |
105 | croak("ODBM_FILE: Can't open %s", filename); |
106 | } |
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107 | dbp = (void*)(dbminit(filename) >= 0 ? &dbmrefcnt : 0); |
108 | RETVAL = (ODBM_File)safemalloc(sizeof(ODBM_File_type)) ; |
109 | Zero(RETVAL, 1, ODBM_File_type) ; |
110 | RETVAL->dbp = dbp ; |
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111 | ST(0) = sv_mortalcopy(&PL_sv_undef); |
56431972 |
112 | sv_setptrobj(ST(0), RETVAL, dbtype); |
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113 | } |
114 | |
115 | void |
116 | DESTROY(db) |
117 | ODBM_File db |
118 | CODE: |
119 | dbmrefcnt--; |
120 | dbmclose(); |
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121 | safefree(db); |
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122 | |
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123 | datum_value |
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124 | odbm_FETCH(db, key) |
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125 | ODBM_File db |
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126 | datum_key key |
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127 | |
128 | int |
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129 | odbm_STORE(db, key, value, flags = DBM_REPLACE) |
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130 | ODBM_File db |
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131 | datum_key key |
132 | datum_value value |
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133 | int flags |
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134 | CLEANUP: |
135 | if (RETVAL) { |
136 | if (RETVAL < 0 && errno == EPERM) |
137 | croak("No write permission to odbm file"); |
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138 | croak("odbm store returned %d, errno %d, key \"%s\"", |
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139 | RETVAL,errno,key.dptr); |
140 | } |
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141 | |
142 | int |
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143 | odbm_DELETE(db, key) |
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144 | ODBM_File db |
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145 | datum_key key |
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146 | |
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147 | datum_key |
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148 | odbm_FIRSTKEY(db) |
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149 | ODBM_File db |
150 | |
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151 | datum_key |
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152 | odbm_NEXTKEY(db, key) |
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153 | ODBM_File db |
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154 | datum_key key |
155 | |
156 | |
157 | #define setFilter(type) \ |
158 | { \ |
159 | if (db->type) \ |
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160 | RETVAL = sv_mortalcopy(db->type) ; \ |
161 | ST(0) = RETVAL ; \ |
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162 | if (db->type && (code == &PL_sv_undef)) { \ |
163 | SvREFCNT_dec(db->type) ; \ |
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164 | db->type = Nullsv ; \ |
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165 | } \ |
166 | else if (code) { \ |
167 | if (db->type) \ |
168 | sv_setsv(db->type, code) ; \ |
169 | else \ |
170 | db->type = newSVsv(code) ; \ |
171 | } \ |
172 | } |
173 | |
174 | |
175 | |
176 | SV * |
177 | filter_fetch_key(db, code) |
178 | ODBM_File db |
179 | SV * code |
180 | SV * RETVAL = &PL_sv_undef ; |
181 | CODE: |
182 | setFilter(filter_fetch_key) ; |
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183 | |
184 | SV * |
185 | filter_store_key(db, code) |
186 | ODBM_File db |
187 | SV * code |
188 | SV * RETVAL = &PL_sv_undef ; |
189 | CODE: |
190 | setFilter(filter_store_key) ; |
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191 | |
192 | SV * |
193 | filter_fetch_value(db, code) |
194 | ODBM_File db |
195 | SV * code |
196 | SV * RETVAL = &PL_sv_undef ; |
197 | CODE: |
198 | setFilter(filter_fetch_value) ; |
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199 | |
200 | SV * |
201 | filter_store_value(db, code) |
202 | ODBM_File db |
203 | SV * code |
204 | SV * RETVAL = &PL_sv_undef ; |
205 | CODE: |
206 | setFilter(filter_store_value) ; |
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207 | |