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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 ; |
0bf2e707 |
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 | |
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84 | #define MY_CXT_KEY "ODBM_File::_guts" XS_VERSION |
85 | |
86 | typedef struct { |
87 | int x_dbmrefcnt; |
88 | } my_cxt_t; |
89 | |
90 | START_MY_CXT |
91 | |
92 | #define dbmrefcnt (MY_CXT.x_dbmrefcnt) |
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93 | |
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94 | #ifndef DBM_REPLACE |
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95 | #define DBM_REPLACE 0 |
85e6fe83 |
96 | #endif |
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97 | |
98 | MODULE = ODBM_File PACKAGE = ODBM_File PREFIX = odbm_ |
99 | |
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100 | BOOT: |
101 | { |
102 | MY_CXT_INIT; |
103 | } |
104 | |
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105 | ODBM_File |
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106 | odbm_TIEHASH(dbtype, filename, flags, mode) |
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107 | char * dbtype |
108 | char * filename |
109 | int flags |
110 | int mode |
111 | CODE: |
112 | { |
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113 | char *tmpbuf; |
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114 | void * dbp ; |
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115 | dMY_CXT; |
116 | |
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117 | if (dbmrefcnt++) |
118 | croak("Old dbm can only open one database"); |
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119 | New(0, tmpbuf, strlen(filename) + 5, char); |
120 | SAVEFREEPV(tmpbuf); |
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121 | sprintf(tmpbuf,"%s.dir",filename); |
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122 | if (stat(tmpbuf, &PL_statbuf) < 0) { |
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123 | if (flags & O_CREAT) { |
124 | if (mode < 0 || close(creat(tmpbuf,mode)) < 0) |
125 | croak("ODBM_File: Can't create %s", filename); |
126 | sprintf(tmpbuf,"%s.pag",filename); |
127 | if (close(creat(tmpbuf,mode)) < 0) |
128 | croak("ODBM_File: Can't create %s", filename); |
129 | } |
130 | else |
131 | croak("ODBM_FILE: Can't open %s", filename); |
132 | } |
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133 | dbp = (void*)(dbminit(filename) >= 0 ? &dbmrefcnt : 0); |
134 | RETVAL = (ODBM_File)safemalloc(sizeof(ODBM_File_type)) ; |
135 | Zero(RETVAL, 1, ODBM_File_type) ; |
136 | RETVAL->dbp = dbp ; |
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137 | ST(0) = sv_mortalcopy(&PL_sv_undef); |
56431972 |
138 | sv_setptrobj(ST(0), RETVAL, dbtype); |
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139 | } |
140 | |
141 | void |
142 | DESTROY(db) |
143 | ODBM_File db |
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144 | PREINIT: |
145 | dMY_CXT; |
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146 | CODE: |
147 | dbmrefcnt--; |
148 | dbmclose(); |
eb99164f |
149 | safefree(db); |
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150 | |
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151 | datum_value |
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152 | odbm_FETCH(db, key) |
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153 | ODBM_File db |
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154 | datum_key_copy key |
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155 | |
156 | int |
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157 | odbm_STORE(db, key, value, flags = DBM_REPLACE) |
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158 | ODBM_File db |
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159 | datum_key key |
160 | datum_value value |
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161 | int flags |
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162 | CLEANUP: |
163 | if (RETVAL) { |
164 | if (RETVAL < 0 && errno == EPERM) |
165 | croak("No write permission to odbm file"); |
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166 | croak("odbm store returned %d, errno %d, key \"%s\"", |
a0d0e21e |
167 | RETVAL,errno,key.dptr); |
168 | } |
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169 | |
170 | int |
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171 | odbm_DELETE(db, key) |
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172 | ODBM_File db |
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173 | datum_key key |
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174 | |
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175 | datum_key |
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176 | odbm_FIRSTKEY(db) |
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177 | ODBM_File db |
178 | |
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179 | datum_key |
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180 | odbm_NEXTKEY(db, key) |
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181 | ODBM_File db |
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182 | datum_key key |
183 | |
184 | |
185 | #define setFilter(type) \ |
186 | { \ |
187 | if (db->type) \ |
cad2e5aa |
188 | RETVAL = sv_mortalcopy(db->type) ; \ |
189 | ST(0) = RETVAL ; \ |
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190 | if (db->type && (code == &PL_sv_undef)) { \ |
191 | SvREFCNT_dec(db->type) ; \ |
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192 | db->type = Nullsv ; \ |
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193 | } \ |
194 | else if (code) { \ |
195 | if (db->type) \ |
196 | sv_setsv(db->type, code) ; \ |
197 | else \ |
198 | db->type = newSVsv(code) ; \ |
199 | } \ |
200 | } |
201 | |
202 | |
203 | |
204 | SV * |
205 | filter_fetch_key(db, code) |
206 | ODBM_File db |
207 | SV * code |
208 | SV * RETVAL = &PL_sv_undef ; |
209 | CODE: |
210 | setFilter(filter_fetch_key) ; |
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211 | |
212 | SV * |
213 | filter_store_key(db, code) |
214 | ODBM_File db |
215 | SV * code |
216 | SV * RETVAL = &PL_sv_undef ; |
217 | CODE: |
218 | setFilter(filter_store_key) ; |
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219 | |
220 | SV * |
221 | filter_fetch_value(db, code) |
222 | ODBM_File db |
223 | SV * code |
224 | SV * RETVAL = &PL_sv_undef ; |
225 | CODE: |
226 | setFilter(filter_fetch_value) ; |
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227 | |
228 | SV * |
229 | filter_store_value(db, code) |
230 | ODBM_File db |
231 | SV * code |
232 | SV * RETVAL = &PL_sv_undef ; |
233 | CODE: |
234 | setFilter(filter_store_value) ; |
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235 | |