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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 | #ifndef HAS_DBMINIT_PROTO |
19 | int dbminit(char* filename); |
20 | int dbmclose(void); |
21 | datum fetch(datum key); |
22 | int store(datum key, datum dat); |
23 | int delete(datum key); |
24 | datum firstkey(void); |
25 | datum nextkey(datum key); |
26 | #endif |
27 | |
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28 | #ifdef DBM_BUG_DUPLICATE_FREE |
29 | /* |
30 | * DBM on at least Ultrix and HPUX call dbmclose() from dbminit(), |
31 | * resulting in duplicate free() because dbmclose() does *not* |
32 | * check if it has already been called for this DBM. |
33 | * If some malloc/free calls have been done between dbmclose() and |
34 | * the next dbminit(), the memory might be used for something else when |
35 | * it is freed. |
36 | * Verified to work on ultrix4.3. Probably will work on HP/UX. |
37 | * Set DBM_BUG_DUPLICATE_FREE in the extension hint file. |
38 | */ |
39 | /* Close the previous dbm, and fail to open a new dbm */ |
40 | #define dbmclose() ((void) dbminit("/tmp/x/y/z/z/y")) |
41 | #endif |
42 | |
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43 | #include <fcntl.h> |
44 | |
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45 | typedef struct { |
46 | void * dbp ; |
47 | SV * filter_fetch_key ; |
48 | SV * filter_store_key ; |
49 | SV * filter_fetch_value ; |
50 | SV * filter_store_value ; |
51 | int filtering ; |
52 | } ODBM_File_type; |
53 | |
54 | typedef ODBM_File_type * ODBM_File ; |
55 | typedef datum datum_key ; |
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56 | typedef datum datum_key_copy ; |
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57 | typedef datum datum_value ; |
58 | |
59 | #define ckFilter(arg,type,name) \ |
60 | if (db->type) { \ |
61 | SV * save_defsv ; \ |
62 | /* printf("filtering %s\n", name) ;*/ \ |
63 | if (db->filtering) \ |
64 | croak("recursion detected in %s", name) ; \ |
65 | db->filtering = TRUE ; \ |
66 | save_defsv = newSVsv(DEFSV) ; \ |
67 | sv_setsv(DEFSV, arg) ; \ |
68 | PUSHMARK(sp) ; \ |
69 | (void) perl_call_sv(db->type, G_DISCARD|G_NOARGS); \ |
70 | sv_setsv(arg, DEFSV) ; \ |
71 | sv_setsv(DEFSV, save_defsv) ; \ |
72 | SvREFCNT_dec(save_defsv) ; \ |
73 | db->filtering = FALSE ; \ |
74 | /*printf("end of filtering %s\n", name) ;*/ \ |
75 | } |
76 | |
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77 | |
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78 | #define odbm_FETCH(db,key) fetch(key) |
79 | #define odbm_STORE(db,key,value,flags) store(key,value) |
80 | #define odbm_DELETE(db,key) delete(key) |
81 | #define odbm_FIRSTKEY(db) firstkey() |
82 | #define odbm_NEXTKEY(db,key) nextkey(key) |
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83 | |
84 | static int dbmrefcnt; |
85 | |
85e6fe83 |
86 | #ifndef DBM_REPLACE |
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87 | #define DBM_REPLACE 0 |
85e6fe83 |
88 | #endif |
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89 | |
90 | MODULE = ODBM_File PACKAGE = ODBM_File PREFIX = odbm_ |
91 | |
92 | ODBM_File |
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93 | odbm_TIEHASH(dbtype, filename, flags, mode) |
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94 | char * dbtype |
95 | char * filename |
96 | int flags |
97 | int mode |
98 | CODE: |
99 | { |
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100 | char *tmpbuf; |
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101 | void * dbp ; |
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102 | if (dbmrefcnt++) |
103 | croak("Old dbm can only open one database"); |
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104 | New(0, tmpbuf, strlen(filename) + 5, char); |
105 | SAVEFREEPV(tmpbuf); |
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106 | sprintf(tmpbuf,"%s.dir",filename); |
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107 | if (stat(tmpbuf, &PL_statbuf) < 0) { |
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108 | if (flags & O_CREAT) { |
109 | if (mode < 0 || close(creat(tmpbuf,mode)) < 0) |
110 | croak("ODBM_File: Can't create %s", filename); |
111 | sprintf(tmpbuf,"%s.pag",filename); |
112 | if (close(creat(tmpbuf,mode)) < 0) |
113 | croak("ODBM_File: Can't create %s", filename); |
114 | } |
115 | else |
116 | croak("ODBM_FILE: Can't open %s", filename); |
117 | } |
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118 | dbp = (void*)(dbminit(filename) >= 0 ? &dbmrefcnt : 0); |
119 | RETVAL = (ODBM_File)safemalloc(sizeof(ODBM_File_type)) ; |
120 | Zero(RETVAL, 1, ODBM_File_type) ; |
121 | RETVAL->dbp = dbp ; |
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122 | ST(0) = sv_mortalcopy(&PL_sv_undef); |
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123 | sv_setptrobj(ST(0), RETVAL, dbtype); |
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124 | } |
125 | |
126 | void |
127 | DESTROY(db) |
128 | ODBM_File db |
129 | CODE: |
130 | dbmrefcnt--; |
131 | dbmclose(); |
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132 | safefree(db); |
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133 | |
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134 | datum_value |
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135 | odbm_FETCH(db, key) |
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136 | ODBM_File db |
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137 | datum_key_copy key |
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138 | |
139 | int |
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140 | odbm_STORE(db, key, value, flags = DBM_REPLACE) |
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141 | ODBM_File db |
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142 | datum_key key |
143 | datum_value value |
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144 | int flags |
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145 | CLEANUP: |
146 | if (RETVAL) { |
147 | if (RETVAL < 0 && errno == EPERM) |
148 | croak("No write permission to odbm file"); |
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149 | croak("odbm store returned %d, errno %d, key \"%s\"", |
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150 | RETVAL,errno,key.dptr); |
151 | } |
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152 | |
153 | int |
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154 | odbm_DELETE(db, key) |
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155 | ODBM_File db |
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156 | datum_key key |
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157 | |
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158 | datum_key |
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159 | odbm_FIRSTKEY(db) |
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160 | ODBM_File db |
161 | |
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162 | datum_key |
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163 | odbm_NEXTKEY(db, key) |
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164 | ODBM_File db |
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165 | datum_key key |
166 | |
167 | |
168 | #define setFilter(type) \ |
169 | { \ |
170 | if (db->type) \ |
cad2e5aa |
171 | RETVAL = sv_mortalcopy(db->type) ; \ |
172 | ST(0) = RETVAL ; \ |
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173 | if (db->type && (code == &PL_sv_undef)) { \ |
174 | SvREFCNT_dec(db->type) ; \ |
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175 | db->type = Nullsv ; \ |
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176 | } \ |
177 | else if (code) { \ |
178 | if (db->type) \ |
179 | sv_setsv(db->type, code) ; \ |
180 | else \ |
181 | db->type = newSVsv(code) ; \ |
182 | } \ |
183 | } |
184 | |
185 | |
186 | |
187 | SV * |
188 | filter_fetch_key(db, code) |
189 | ODBM_File db |
190 | SV * code |
191 | SV * RETVAL = &PL_sv_undef ; |
192 | CODE: |
193 | setFilter(filter_fetch_key) ; |
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194 | |
195 | SV * |
196 | filter_store_key(db, code) |
197 | ODBM_File db |
198 | SV * code |
199 | SV * RETVAL = &PL_sv_undef ; |
200 | CODE: |
201 | setFilter(filter_store_key) ; |
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202 | |
203 | SV * |
204 | filter_fetch_value(db, code) |
205 | ODBM_File db |
206 | SV * code |
207 | SV * RETVAL = &PL_sv_undef ; |
208 | CODE: |
209 | setFilter(filter_fetch_value) ; |
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210 | |
211 | SV * |
212 | filter_store_value(db, code) |
213 | ODBM_File db |
214 | SV * code |
215 | SV * RETVAL = &PL_sv_undef ; |
216 | CODE: |
217 | setFilter(filter_store_value) ; |
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218 | |