Commit | Line | Data |
463ee0b2 |
1 | /* |
2 | * sdbm - ndbm work-alike hashed database library |
3 | * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978). |
4 | * author: oz@nexus.yorku.ca |
5 | * status: public domain. |
6 | */ |
7 | #define DBLKSIZ 4096 |
8 | #define PBLKSIZ 1024 |
9 | #define PAIRMAX 1008 /* arbitrary on PBLKSIZ-N */ |
10 | #define SPLTMAX 10 /* maximum allowed splits */ |
11 | /* for a single insertion */ |
bf99883d |
12 | #ifdef VMS |
13 | #define DIRFEXT ".sdbm_dir" |
14 | #else |
463ee0b2 |
15 | #define DIRFEXT ".dir" |
bf99883d |
16 | #endif |
463ee0b2 |
17 | #define PAGFEXT ".pag" |
18 | |
19 | typedef struct { |
20 | int dirf; /* directory file descriptor */ |
21 | int pagf; /* page file descriptor */ |
22 | int flags; /* status/error flags, see below */ |
23 | long maxbno; /* size of dirfile in bits */ |
24 | long curbit; /* current bit number */ |
25 | long hmask; /* current hash mask */ |
26 | long blkptr; /* current block for nextkey */ |
27 | int keyptr; /* current key for nextkey */ |
28 | long blkno; /* current page to read/write */ |
29 | long pagbno; /* current page in pagbuf */ |
30 | char pagbuf[PBLKSIZ]; /* page file block buffer */ |
31 | long dirbno; /* current block in dirbuf */ |
32 | char dirbuf[DBLKSIZ]; /* directory file block buffer */ |
33 | } DBM; |
34 | |
35 | #define DBM_RDONLY 0x1 /* data base open read-only */ |
36 | #define DBM_IOERR 0x2 /* data base I/O error */ |
37 | |
38 | /* |
39 | * utility macros |
40 | */ |
41 | #define sdbm_rdonly(db) ((db)->flags & DBM_RDONLY) |
42 | #define sdbm_error(db) ((db)->flags & DBM_IOERR) |
43 | |
44 | #define sdbm_clearerr(db) ((db)->flags &= ~DBM_IOERR) /* ouch */ |
45 | |
46 | #define sdbm_dirfno(db) ((db)->dirf) |
47 | #define sdbm_pagfno(db) ((db)->pagf) |
48 | |
49 | typedef struct { |
50 | char *dptr; |
51 | int dsize; |
52 | } datum; |
53 | |
17f28c40 |
54 | EXTCONST datum nullitem |
55 | #ifdef DOINIT |
dd2664b9 |
56 | = {0, 0} |
17f28c40 |
57 | #endif |
58 | ; |
463ee0b2 |
59 | |
c31fac66 |
60 | #if defined(__STDC__) || defined(__cplusplus) || defined(CAN_PROTOTYPE) |
463ee0b2 |
61 | #define proto(p) p |
62 | #else |
63 | #define proto(p) () |
64 | #endif |
65 | |
66 | /* |
67 | * flags to sdbm_store |
68 | */ |
69 | #define DBM_INSERT 0 |
70 | #define DBM_REPLACE 1 |
71 | |
72 | /* |
73 | * ndbm interface |
74 | */ |
75 | extern DBM *sdbm_open proto((char *, int, int)); |
76 | extern void sdbm_close proto((DBM *)); |
77 | extern datum sdbm_fetch proto((DBM *, datum)); |
78 | extern int sdbm_delete proto((DBM *, datum)); |
79 | extern int sdbm_store proto((DBM *, datum, datum, int)); |
80 | extern datum sdbm_firstkey proto((DBM *)); |
81 | extern datum sdbm_nextkey proto((DBM *)); |
82 | |
83 | /* |
84 | * other |
85 | */ |
86 | extern DBM *sdbm_prep proto((char *, char *, int, int)); |
87 | extern long sdbm_hash proto((char *, int)); |
88 | |
89 | #ifndef SDBM_ONLY |
ff68c719 |
90 | #define dbm_open sdbm_open |
91 | #define dbm_close sdbm_close |
92 | #define dbm_fetch sdbm_fetch |
93 | #define dbm_store sdbm_store |
94 | #define dbm_delete sdbm_delete |
95 | #define dbm_firstkey sdbm_firstkey |
96 | #define dbm_nextkey sdbm_nextkey |
97 | #define dbm_error sdbm_error |
98 | #define dbm_clearerr sdbm_clearerr |
463ee0b2 |
99 | #endif |
85e6fe83 |
100 | |
101 | /* Most of the following is stolen from perl.h. */ |
102 | #ifndef H_PERL /* Include guard */ |
103 | |
104 | /* |
105 | * The following contortions are brought to you on behalf of all the |
106 | * standards, semi-standards, de facto standards, not-so-de-facto standards |
107 | * of the world, as well as all the other botches anyone ever thought of. |
108 | * The basic theory is that if we work hard enough here, the rest of the |
109 | * code can be a lot prettier. Well, so much for theory. Sorry, Henry... |
110 | */ |
111 | |
112 | #include <errno.h> |
113 | #ifdef HAS_SOCKET |
114 | # ifdef I_NET_ERRNO |
115 | # include <net/errno.h> |
116 | # endif |
117 | #endif |
118 | |
85e6fe83 |
119 | #if defined(__STDC__) || defined(_AIX) || defined(__stdc__) || defined(__cplusplus) |
120 | # define STANDARD_C 1 |
121 | #endif |
122 | |
85e6fe83 |
123 | #include <stdio.h> |
124 | #include <ctype.h> |
125 | #include <setjmp.h> |
126 | |
17f28c40 |
127 | #if defined(I_UNISTD) |
85e6fe83 |
128 | #include <unistd.h> |
129 | #endif |
130 | |
bf99883d |
131 | #ifdef VMS |
17f28c40 |
132 | # include <file.h> |
133 | # include <unixio.h> |
bf99883d |
134 | #endif |
135 | |
136 | #if !defined(MSDOS) && !defined(WIN32) && !defined(VMS) |
85e6fe83 |
137 | # ifdef PARAM_NEEDS_TYPES |
138 | # include <sys/types.h> |
139 | # endif |
140 | # include <sys/param.h> |
141 | #endif |
142 | |
143 | #ifndef _TYPES_ /* If types.h defines this it's easy. */ |
144 | # ifndef major /* Does everyone's types.h define this? */ |
145 | # include <sys/types.h> |
146 | # endif |
147 | #endif |
148 | |
85e6fe83 |
149 | #include <sys/stat.h> |
150 | |
151 | #ifndef SEEK_SET |
152 | # ifdef L_SET |
153 | # define SEEK_SET L_SET |
154 | # else |
155 | # define SEEK_SET 0 /* Wild guess. */ |
156 | # endif |
157 | #endif |
158 | |
159 | /* Use all the "standard" definitions? */ |
94b6baf5 |
160 | #if defined(STANDARD_C) && defined(I_STDLIB) |
85e6fe83 |
161 | # include <stdlib.h> |
85e6fe83 |
162 | #endif /* STANDARD_C */ |
163 | |
a0d0e21e |
164 | #define MEM_SIZE Size_t |
165 | |
55497cff |
166 | /* This comes after <stdlib.h> so we don't try to change the standard |
167 | * library prototypes; we'll use our own instead. */ |
168 | |
169 | #if defined(MYMALLOC) && (defined(HIDEMYMALLOC) || defined(EMBEDMYMALLOC)) |
170 | |
171 | # ifdef HIDEMYMALLOC |
172 | # define malloc Mymalloc |
173 | # define calloc Mycalloc |
174 | # define realloc Myremalloc |
175 | # define free Myfree |
176 | # endif |
177 | # ifdef EMBEDMYMALLOC |
178 | # define malloc Perl_malloc |
179 | # define calloc Perl_calloc |
180 | # define realloc Perl_realloc |
181 | # define free Perl_free |
182 | # endif |
183 | |
1e7d9bb3 |
184 | Malloc_t malloc proto((MEM_SIZE nbytes)); |
185 | Malloc_t calloc proto((MEM_SIZE elements, MEM_SIZE size)); |
186 | Malloc_t realloc proto((Malloc_t where, MEM_SIZE nbytes)); |
187 | Free_t free proto((Malloc_t where)); |
55497cff |
188 | |
189 | #endif /* MYMALLOC && (HIDEMYMALLOC || EMBEDMYMALLOC) */ |
190 | |
a0d0e21e |
191 | #ifdef I_STRING |
192 | #include <string.h> |
193 | #else |
194 | #include <strings.h> |
195 | #endif |
196 | |
197 | #ifdef I_MEMORY |
198 | #include <memory.h> |
f0f333f4 |
199 | #endif |
200 | |
201 | #ifdef __cplusplus |
202 | #define HAS_MEMCPY |
a0d0e21e |
203 | #endif |
204 | |
85e6fe83 |
205 | #ifdef HAS_MEMCPY |
206 | # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) |
207 | # ifndef memcpy |
1e7d9bb3 |
208 | extern char * memcpy proto((char*, char*, int)); |
85e6fe83 |
209 | # endif |
210 | # endif |
211 | #else |
212 | # ifndef memcpy |
213 | # ifdef HAS_BCOPY |
214 | # define memcpy(d,s,l) bcopy(s,d,l) |
215 | # else |
216 | # define memcpy(d,s,l) my_bcopy(s,d,l) |
217 | # endif |
218 | # endif |
219 | #endif /* HAS_MEMCPY */ |
220 | |
221 | #ifdef HAS_MEMSET |
222 | # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) |
223 | # ifndef memset |
1e7d9bb3 |
224 | extern char *memset proto((char*, int, int)); |
85e6fe83 |
225 | # endif |
226 | # endif |
227 | # define memzero(d,l) memset(d,0,l) |
228 | #else |
229 | # ifndef memzero |
230 | # ifdef HAS_BZERO |
231 | # define memzero(d,l) bzero(d,l) |
232 | # else |
233 | # define memzero(d,l) my_bzero(d,l) |
234 | # endif |
235 | # endif |
236 | #endif /* HAS_MEMSET */ |
237 | |
36477c24 |
238 | #if defined(mips) && defined(ultrix) && !defined(__STDC__) |
239 | # undef HAS_MEMCMP |
240 | #endif |
241 | |
242 | #if defined(HAS_MEMCMP) && defined(HAS_SANE_MEMCMP) |
85e6fe83 |
243 | # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) |
244 | # ifndef memcmp |
1e7d9bb3 |
245 | extern int memcmp proto((char*, char*, int)); |
85e6fe83 |
246 | # endif |
247 | # endif |
36477c24 |
248 | # ifdef BUGGY_MSC |
249 | # pragma function(memcmp) |
250 | # endif |
85e6fe83 |
251 | #else |
252 | # ifndef memcmp |
bf99883d |
253 | /* maybe we should have included the full embedding header... */ |
36477c24 |
254 | # ifdef NO_EMBED |
255 | # define memcmp my_memcmp |
256 | # else |
257 | # define memcmp Perl_my_memcmp |
258 | # endif |
f0f333f4 |
259 | #ifndef __cplusplus |
1e7d9bb3 |
260 | extern int memcmp proto((char*, char*, int)); |
f0f333f4 |
261 | #endif |
85e6fe83 |
262 | # endif |
263 | #endif /* HAS_MEMCMP */ |
264 | |
85e6fe83 |
265 | #ifndef HAS_BCMP |
266 | # ifndef bcmp |
267 | # define bcmp(s1,s2,l) memcmp(s1,s2,l) |
268 | # endif |
36477c24 |
269 | #endif /* !HAS_BCMP */ |
270 | |
271 | #ifdef HAS_MEMCMP |
272 | # define memNE(s1,s2,l) (memcmp(s1,s2,l)) |
273 | # define memEQ(s1,s2,l) (!memcmp(s1,s2,l)) |
274 | #else |
275 | # define memNE(s1,s2,l) (bcmp(s1,s2,l)) |
276 | # define memEQ(s1,s2,l) (!bcmp(s1,s2,l)) |
277 | #endif |
85e6fe83 |
278 | |
279 | #ifdef I_NETINET_IN |
bf99883d |
280 | # ifdef VMS |
281 | # include <in.h> |
282 | # else |
283 | # include <netinet/in.h> |
284 | # endif |
85e6fe83 |
285 | #endif |
286 | |
287 | #endif /* Include guard */ |
4e35701f |
288 | |