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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 | #ifndef HAS_DBMINIT_PROTO |
14 | int dbminit(char* filename); |
15 | int dbmclose(void); |
16 | datum fetch(datum key); |
17 | int store(datum key, datum dat); |
18 | int delete(datum key); |
19 | datum firstkey(void); |
20 | datum nextkey(datum key); |
21 | #endif |
22 | |
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23 | #ifdef DBM_BUG_DUPLICATE_FREE |
24 | /* |
25 | * DBM on at least Ultrix and HPUX call dbmclose() from dbminit(), |
26 | * resulting in duplicate free() because dbmclose() does *not* |
27 | * check if it has already been called for this DBM. |
28 | * If some malloc/free calls have been done between dbmclose() and |
29 | * the next dbminit(), the memory might be used for something else when |
30 | * it is freed. |
31 | * Verified to work on ultrix4.3. Probably will work on HP/UX. |
32 | * Set DBM_BUG_DUPLICATE_FREE in the extension hint file. |
33 | */ |
34 | /* Close the previous dbm, and fail to open a new dbm */ |
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35 | #define dbmclose() ((void) dbminit("/non/exist/ent")) |
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36 | #endif |
37 | |
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38 | #include <fcntl.h> |
39 | |
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40 | typedef struct { |
41 | void * dbp ; |
42 | SV * filter_fetch_key ; |
43 | SV * filter_store_key ; |
44 | SV * filter_fetch_value ; |
45 | SV * filter_store_value ; |
46 | int filtering ; |
47 | } ODBM_File_type; |
48 | |
49 | typedef ODBM_File_type * ODBM_File ; |
50 | typedef datum datum_key ; |
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51 | typedef datum datum_key_copy ; |
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52 | typedef datum datum_value ; |
53 | |
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54 | #define odbm_FETCH(db,key) fetch(key) |
55 | #define odbm_STORE(db,key,value,flags) store(key,value) |
56 | #define odbm_DELETE(db,key) delete(key) |
57 | #define odbm_FIRSTKEY(db) firstkey() |
58 | #define odbm_NEXTKEY(db,key) nextkey(key) |
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59 | |
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60 | #define MY_CXT_KEY "ODBM_File::_guts" XS_VERSION |
61 | |
62 | typedef struct { |
63 | int x_dbmrefcnt; |
64 | } my_cxt_t; |
65 | |
66 | START_MY_CXT |
67 | |
68 | #define dbmrefcnt (MY_CXT.x_dbmrefcnt) |
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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 | |
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76 | BOOT: |
77 | { |
78 | MY_CXT_INIT; |
79 | } |
80 | |
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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 | dMY_CXT; |
92 | |
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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 |
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120 | PREINIT: |
121 | dMY_CXT; |
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122 | CODE: |
123 | dbmrefcnt--; |
124 | dbmclose(); |
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125 | safefree(db); |
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126 | |
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127 | datum_value |
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128 | odbm_FETCH(db, key) |
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129 | ODBM_File db |
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130 | datum_key_copy key |
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131 | |
132 | int |
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133 | odbm_STORE(db, key, value, flags = DBM_REPLACE) |
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134 | ODBM_File db |
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135 | datum_key key |
136 | datum_value value |
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137 | int flags |
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138 | CLEANUP: |
139 | if (RETVAL) { |
140 | if (RETVAL < 0 && errno == EPERM) |
141 | croak("No write permission to odbm file"); |
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142 | croak("odbm store returned %d, errno %d, key \"%s\"", |
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143 | RETVAL,errno,key.dptr); |
144 | } |
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145 | |
146 | int |
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147 | odbm_DELETE(db, key) |
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148 | ODBM_File db |
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149 | datum_key key |
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150 | |
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151 | datum_key |
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152 | odbm_FIRSTKEY(db) |
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153 | ODBM_File db |
154 | |
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155 | datum_key |
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156 | odbm_NEXTKEY(db, key) |
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157 | ODBM_File db |
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158 | datum_key key |
159 | |
160 | |
161 | #define setFilter(type) \ |
162 | { \ |
163 | if (db->type) \ |
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164 | RETVAL = sv_mortalcopy(db->type) ; \ |
165 | ST(0) = RETVAL ; \ |
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166 | if (db->type && (code == &PL_sv_undef)) { \ |
167 | SvREFCNT_dec(db->type) ; \ |
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168 | db->type = Nullsv ; \ |
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169 | } \ |
170 | else if (code) { \ |
171 | if (db->type) \ |
172 | sv_setsv(db->type, code) ; \ |
173 | else \ |
174 | db->type = newSVsv(code) ; \ |
175 | } \ |
176 | } |
177 | |
178 | |
179 | |
180 | SV * |
181 | filter_fetch_key(db, code) |
182 | ODBM_File db |
183 | SV * code |
184 | SV * RETVAL = &PL_sv_undef ; |
185 | CODE: |
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186 | DBM_setFilter(db->filter_fetch_key, code) ; |
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187 | |
188 | SV * |
189 | filter_store_key(db, code) |
190 | ODBM_File db |
191 | SV * code |
192 | SV * RETVAL = &PL_sv_undef ; |
193 | CODE: |
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194 | DBM_setFilter(db->filter_store_key, code) ; |
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195 | |
196 | SV * |
197 | filter_fetch_value(db, code) |
198 | ODBM_File db |
199 | SV * code |
200 | SV * RETVAL = &PL_sv_undef ; |
201 | CODE: |
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202 | DBM_setFilter(db->filter_fetch_value, code) ; |
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203 | |
204 | SV * |
205 | filter_store_value(db, code) |
206 | ODBM_File db |
207 | SV * code |
208 | SV * RETVAL = &PL_sv_undef ; |
209 | CODE: |
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210 | DBM_setFilter(db->filter_store_value, code) ; |
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211 | |