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