[f6b5f0] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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| 4 | |
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[92e539] | 5 | //**************************************************************************/ |
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[0e1846] | 6 | // |
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[341696] | 7 | // $Id$ |
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[0e1846] | 8 | // |
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[92e539] | 9 | //**************************************************************************/ |
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[f6b5f0] | 10 | // 'sing_dbm.cc' containes command to handle dbm-files under |
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[a3bc95e] | 11 | // Singular. |
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[0e1846] | 12 | // |
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[92e539] | 13 | //**************************************************************************/ |
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[0e1846] | 14 | |
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[b7b08c] | 15 | # include <stdio.h> |
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| 16 | # include <fcntl.h> |
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| 17 | # include <errno.h> |
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| 18 | |
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[762407] | 19 | #include "config.h" |
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[b1dfaf] | 20 | #include <kernel/mod2.h> |
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[0e1846] | 21 | |
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| 22 | #ifdef HAVE_DBM |
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| 23 | |
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[599326] | 24 | # include <Singular/tok.h> |
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| 25 | # include <kernel/febase.h> |
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[b1dfaf] | 26 | #include <omalloc/omalloc.h> |
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[599326] | 27 | # include <Singular/ipid.h> |
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| 28 | # include <Singular/silink.h> |
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| 29 | # include <Singular/sing_dbm.h> |
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[0e1846] | 30 | |
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[0c7cb8] | 31 | // #ifdef ix86_Win |
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| 32 | // # define USE_GDBM |
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| 33 | // # define BLOCKSIZE 1 |
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| 34 | // # define GDBM_STATIC |
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| 35 | // # include <gdbm.h> |
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| 36 | // #endif |
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[fcafdb] | 37 | |
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| 38 | #ifdef USE_GDBM |
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| 39 | typedef struct { |
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| 40 | GDBM_FILE db; // pointer to open database |
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| 41 | int first; // firstkey to look for? |
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| 42 | datum actual; // the actual key |
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| 43 | } GDBM_info; |
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| 44 | |
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| 45 | //**************************************************************************/ |
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[0a001f] | 46 | LINKAGE BOOLEAN dbOpen(si_link l, short flag, leftv u) |
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[fcafdb] | 47 | { |
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| 48 | char *mode = "r"; |
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| 49 | GDBM_info *db; |
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| 50 | datum d_key; |
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| 51 | // int dbm_flags = O_RDONLY | O_CREAT; // open database readonly as default |
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[a3bc95e] | 52 | int read_write= GDBM_READER; |
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[fcafdb] | 53 | |
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| 54 | if(flag & SI_LINK_WRITE) |
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| 55 | { |
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[50cbdc] | 56 | // if((l->mode==NULL) |
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| 57 | // || ((l->mode[0]!='w')&&(l->mode[1]!='w'))) |
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| 58 | // { |
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| 59 | // // request w- open, but mode is not "w" nor "rw" => fail |
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| 60 | // return TRUE; |
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| 61 | // } |
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[fcafdb] | 62 | // dbm_flags = O_RDWR | O_CREAT; |
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[50cbdc] | 63 | read_write = GDBM_WRCREAT | GDBM_NOLOCK; |
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[fcafdb] | 64 | mode = "rw"; |
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| 65 | } |
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| 66 | if(flag & SI_LINK_READ) |
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| 67 | { |
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| 68 | if (strcmp(l->mode,"rw")==0) mode="rw"; |
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| 69 | } |
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| 70 | //if (((db = (DBM_info *)omAlloc(sizeof *db)) != NULL) |
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| 71 | //&&((db->db = dbm_open(l->name, dbm_flags, 0664 )) != NULL )) |
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| 72 | db = (GDBM_info *)omAlloc0(sizeof *db); |
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| 73 | if((db->db = gdbm_open(l->name, BLOCKSIZE, read_write, 0664, 0)) != NULL ) |
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| 74 | { |
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| 75 | // if (db->first) // first created? |
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| 76 | // { |
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| 77 | // db->actual=gdbm_firstkey(db->db); |
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| 78 | // } |
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| 79 | // else |
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| 80 | // { |
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| 81 | // d_key=db->actual; |
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| 82 | // if (d_key.dptr!=NULL) |
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| 83 | // { |
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| 84 | // db->actual=gdbm_nextkey(db->db,db->actual); |
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| 85 | // } |
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| 86 | // else { db->actual=gdbm_firstkey(db->db); } |
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| 87 | // } |
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| 88 | db->first=1; |
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| 89 | if(flag & SI_LINK_WRITE) |
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| 90 | SI_LINK_SET_W_OPEN_P(l); |
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| 91 | else |
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| 92 | SI_LINK_SET_R_OPEN_P(l); |
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| 93 | l->data=(void *)(db); |
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| 94 | omFree(l->mode); |
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| 95 | l->mode=omStrDup(mode); |
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| 96 | return FALSE; |
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| 97 | } |
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[50cbdc] | 98 | Print("%d/%s",gdbm_errno,gdbm_strerror(gdbm_errno)); |
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[fcafdb] | 99 | return TRUE; |
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| 100 | } |
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| 101 | |
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| 102 | //**************************************************************************/ |
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| 103 | LINKAGE BOOLEAN dbClose(si_link l) |
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| 104 | { |
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| 105 | GDBM_info *db = (GDBM_info *)l->data; |
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[50cbdc] | 106 | gdbm_sync(db->db); |
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[fcafdb] | 107 | gdbm_close(db->db); |
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| 108 | omFreeSize((ADDRESS)db,(sizeof *db)); |
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[a3bc95e] | 109 | l->data=NULL; |
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[fcafdb] | 110 | SI_LINK_SET_CLOSE_P(l); |
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| 111 | return FALSE; |
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| 112 | } |
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| 113 | |
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| 114 | //**************************************************************************/ |
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| 115 | static datum d_value; |
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| 116 | LINKAGE leftv dbRead2(si_link l, leftv key) |
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| 117 | { |
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| 118 | GDBM_info *db = (GDBM_info *)l->data; |
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| 119 | // GDBM_info *db; |
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| 120 | // db = (GDBM_info *)omAlloc0(sizeof *db); |
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| 121 | // db = (GDBM_info *)l->data; |
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| 122 | leftv v=NULL; |
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| 123 | datum d_key; |
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| 124 | int flag; |
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| 125 | |
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| 126 | if (!SI_LINK_R_OPEN_P(l)) //exceptions |
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| 127 | // if (strcmp(l->mode,"rw")==0) //rw-mode |
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| 128 | { |
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| 129 | if (!SI_LINK_CLOSE_P(l)) |
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| 130 | { |
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| 131 | if (!dbClose(l)) {Print("cannot close link!\n");} |
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| 132 | } |
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[a3bc95e] | 133 | //(SI_LINK_CLOSE_P(l)) automatically |
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[50cbdc] | 134 | if (dbOpen(l, SI_LINK_READ)) return NULL; |
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[fcafdb] | 135 | } |
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| 136 | if (SI_LINK_RW_OPEN_P(l)) {Print("I/O Error!\n");} |
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| 137 | |
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| 138 | if(key!=NULL) |
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| 139 | { |
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| 140 | if (key->Typ()==STRING_CMD) |
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| 141 | { |
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| 142 | d_key.dptr = (char*)key->Data(); |
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| 143 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 144 | d_value = gdbm_fetch(db->db, d_key); |
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| 145 | v=(leftv)omAlloc0Bin(sleftv_bin); |
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| 146 | if (d_value.dptr!=NULL) v->data=omStrDup(d_value.dptr); |
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| 147 | else v->data=omStrDup(""); |
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| 148 | v->rtyp=STRING_CMD; |
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| 149 | } |
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| 150 | else |
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| 151 | { |
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| 152 | WerrorS("read(`GDBM link`,`string`) expected"); |
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| 153 | } |
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| 154 | } |
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| 155 | else |
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| 156 | { |
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| 157 | if (db->first) |
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| 158 | { |
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| 159 | db->first=0; |
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| 160 | d_key = gdbm_firstkey(db->db); |
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| 161 | // db->actual=d_key; |
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| 162 | // Print("firstkey:%s\n",d_key.dptr); |
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| 163 | } |
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| 164 | else |
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| 165 | { |
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| 166 | if (db->actual.dptr==NULL) |
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| 167 | { |
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| 168 | db->actual=gdbm_firstkey(db->db); |
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| 169 | } |
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| 170 | d_key = gdbm_nextkey(db->db,db->actual); |
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| 171 | db->actual=d_key; |
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| 172 | if (d_key.dptr==NULL) |
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| 173 | { |
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| 174 | db->first=1; |
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| 175 | // Print("nextkey:NULL\n"); |
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| 176 | } |
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| 177 | // else |
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| 178 | // Print("nextkey:%s\n",d_key.dptr); |
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| 179 | } |
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| 180 | |
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| 181 | if (d_key.dptr!=NULL) |
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| 182 | d_value = gdbm_fetch(db->db, d_key); |
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| 183 | else |
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| 184 | d_value.dptr=NULL; |
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| 185 | |
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| 186 | v=(leftv)omAlloc0Bin(sleftv_bin); |
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| 187 | v->rtyp=STRING_CMD; |
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| 188 | if (d_value.dptr!=NULL) |
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| 189 | { |
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| 190 | v->data=omStrDup(d_key.dptr); |
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| 191 | db->first = 0; |
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| 192 | } |
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| 193 | else |
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| 194 | { |
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| 195 | v->data=omStrDup(""); |
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| 196 | // db->first = 1; |
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| 197 | } |
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| 198 | |
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| 199 | } |
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| 200 | return v; |
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| 201 | } |
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| 202 | LINKAGE leftv dbRead1(si_link l) |
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| 203 | { |
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| 204 | return dbRead2(l,NULL); |
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| 205 | } |
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| 206 | //**************************************************************************/ |
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| 207 | LINKAGE BOOLEAN dbWrite(si_link l, leftv key) |
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| 208 | { |
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| 209 | GDBM_info *db = (GDBM_info *)l->data; |
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| 210 | // GDBM_info *db; |
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| 211 | // db = (GDBM_info *)omAlloc0(sizeof *db); |
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| 212 | // db = (GDBM_info *)l->data; |
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| 213 | BOOLEAN b=TRUE; |
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| 214 | register int ret; |
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[a3bc95e] | 215 | |
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[fcafdb] | 216 | if (strcmp(l->mode,"rw")!=0) // r-mode |
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| 217 | { |
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| 218 | Print("Write error on readonly source\n"); |
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| 219 | } |
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| 220 | else //rw-mode |
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| 221 | { |
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| 222 | if (!SI_LINK_W_OPEN_P(l)) //exceptions |
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| 223 | { |
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| 224 | if (!SI_LINK_CLOSE_P(l)) |
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| 225 | { |
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| 226 | if (!dbClose(l)) {Print("close error\n");}; |
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| 227 | } |
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| 228 | if (!dbOpen(l,SI_LINK_WRITE)) {Print("open_for_write error\n");} |
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| 229 | } |
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| 230 | } |
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| 231 | |
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| 232 | if((key!=NULL) && (key->Typ()==STRING_CMD) ) |
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[a3bc95e] | 233 | { |
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[fcafdb] | 234 | if (key->next!=NULL) // have a second parameter ? |
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| 235 | { |
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| 236 | if(key->next->Typ()==STRING_CMD) // replace (key,value) |
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| 237 | { |
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| 238 | datum d_key, d_value; |
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| 239 | |
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| 240 | d_key.dptr = (char *)key->Data(); |
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| 241 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 242 | d_value.dptr = (char *)key->next->Data(); |
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| 243 | d_value.dsize = strlen(d_value.dptr)+1; |
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| 244 | ret = gdbm_store(db->db, d_key, d_value, GDBM_REPLACE); |
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| 245 | // db->actual=d_key; |
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| 246 | if (ret==-1) {Print("reader calls gdbm_store!");} |
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| 247 | if (ret==0) |
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| 248 | { b=FALSE; } |
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| 249 | else |
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| 250 | { |
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| 251 | // if(gdbm_error(db->db)) |
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[50cbdc] | 252 | if (gdbm_errno != 0) |
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[fcafdb] | 253 | { |
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[50cbdc] | 254 | Werror("GDBM link I/O error: '%s' ", gdbm_errno); |
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| 255 | // Print(gdbm_strerror(gdbm_errno)); |
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[fcafdb] | 256 | //dbm_clearerr(db->db); |
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| 257 | // gdbm_errno=0; |
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| 258 | } |
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| 259 | } |
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| 260 | } |
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| 261 | } |
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| 262 | else |
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| 263 | { // delete (key) |
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| 264 | datum d_key; |
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| 265 | |
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| 266 | d_key.dptr = (char *)key->Data(); |
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| 267 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 268 | // db->actual=gdbm_nextkey(db->db,d_key); |
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| 269 | gdbm_delete(db->db, d_key); |
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| 270 | b=FALSE; |
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| 271 | } |
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| 272 | } |
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| 273 | else |
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| 274 | { |
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| 275 | WerrorS("write(`GDBM link`,`key string` [,`data string`]) expected"); |
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| 276 | } |
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[50cbdc] | 277 | gdbm_sync(db->db); |
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[fcafdb] | 278 | return b; |
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| 279 | } |
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| 280 | #endif /* USE_GDBM */ |
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| 281 | |
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| 282 | #ifndef USE_GDBM |
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[0e1846] | 283 | /* These are the routines in dbm. */ |
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[92e539] | 284 | # include "ndbm.h" |
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| 285 | typedef struct { |
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| 286 | DBM *db; // pointer to open database |
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| 287 | int first; // firstkey to look for? |
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| 288 | } DBM_info; |
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[0e1846] | 289 | |
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[92e539] | 290 | //**************************************************************************/ |
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[ebc73ed] | 291 | LINKAGE BOOLEAN dbOpen(si_link l, short flag, leftv u) |
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[0e1846] | 292 | { |
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[6b4ff12] | 293 | const char *mode = "r"; |
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[92e539] | 294 | DBM_info *db; |
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| 295 | int dbm_flags = O_RDONLY | O_CREAT; // open database readonly as default |
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| 296 | |
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[8fda0d] | 297 | if((l->mode!=NULL) |
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| 298 | && ((l->mode[0]=='w')||(l->mode[1]=='w'))) |
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[573ae7] | 299 | { |
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| 300 | dbm_flags = O_RDWR | O_CREAT; |
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| 301 | mode = "rw"; |
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[8fda0d] | 302 | flag|=SI_LINK_WRITE|SI_LINK_READ; |
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| 303 | } |
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| 304 | else if(flag & SI_LINK_WRITE) |
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| 305 | { |
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| 306 | // request w- open, but mode is not "w" nor "rw" => fail |
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| 307 | return TRUE; |
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[92e539] | 308 | } |
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[c232af] | 309 | //if (((db = (DBM_info *)omAlloc(sizeof *db)) != NULL) |
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[275397] | 310 | //&&((db->db = dbm_open(l->name, dbm_flags, 0664 )) != NULL )) |
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[c232af] | 311 | db = (DBM_info *)omAlloc(sizeof *db); |
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[275397] | 312 | if((db->db = dbm_open(l->name, dbm_flags, 0664 )) != NULL ) |
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[573ae7] | 313 | { |
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| 314 | db->first=1; |
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[1fc83c0] | 315 | if(flag & SI_LINK_WRITE) |
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| 316 | SI_LINK_SET_RW_OPEN_P(l); |
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| 317 | else |
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| 318 | SI_LINK_SET_R_OPEN_P(l); |
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[573ae7] | 319 | l->data=(void *)(db); |
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[c232af] | 320 | omFree(l->mode); |
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| 321 | l->mode=omStrDup(mode); |
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[573ae7] | 322 | return FALSE; |
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[0e1846] | 323 | } |
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| 324 | return TRUE; |
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| 325 | } |
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| 326 | |
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[92e539] | 327 | //**************************************************************************/ |
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[6b32990] | 328 | LINKAGE BOOLEAN dbClose(si_link l) |
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[0e1846] | 329 | { |
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[573ae7] | 330 | DBM_info *db = (DBM_info *)l->data; |
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[92e539] | 331 | |
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| 332 | dbm_close(db->db); |
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[c232af] | 333 | omFreeSize((ADDRESS)db,(sizeof *db)); |
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[a3bc95e] | 334 | l->data=NULL; |
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[0e1846] | 335 | SI_LINK_SET_CLOSE_P(l); |
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| 336 | return FALSE; |
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| 337 | } |
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| 338 | |
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[92e539] | 339 | //**************************************************************************/ |
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[0e1846] | 340 | static datum d_value; |
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[6b32990] | 341 | LINKAGE leftv dbRead2(si_link l, leftv key) |
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[0e1846] | 342 | { |
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[573ae7] | 343 | DBM_info *db = (DBM_info *)l->data; |
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[0e1846] | 344 | leftv v=NULL; |
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[573ae7] | 345 | datum d_key; |
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[0e1846] | 346 | |
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[573ae7] | 347 | if(key!=NULL) |
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| 348 | { |
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| 349 | if (key->Typ()==STRING_CMD) |
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[0e1846] | 350 | { |
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[573ae7] | 351 | d_key.dptr = (char*)key->Data(); |
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| 352 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 353 | d_value = dbm_fetch(db->db, d_key); |
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[c232af] | 354 | v=(leftv)omAlloc0Bin(sleftv_bin); |
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| 355 | if (d_value.dptr!=NULL) v->data=omStrDup(d_value.dptr); |
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| 356 | else v->data=omStrDup(""); |
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[0e1846] | 357 | v->rtyp=STRING_CMD; |
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[573ae7] | 358 | } |
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| 359 | else |
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| 360 | { |
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| 361 | WerrorS("read(`DBM link`,`string`) expected"); |
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[0e1846] | 362 | } |
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| 363 | } |
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| 364 | else |
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| 365 | { |
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[1fc83c0] | 366 | if(db->first) |
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| 367 | d_value = dbm_firstkey((DBM *)db->db); |
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| 368 | else |
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| 369 | d_value = dbm_nextkey((DBM *)db->db); |
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[573ae7] | 370 | |
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[c232af] | 371 | v=(leftv)omAlloc0Bin(sleftv_bin); |
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[573ae7] | 372 | v->rtyp=STRING_CMD; |
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| 373 | if (d_value.dptr!=NULL) |
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| 374 | { |
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[c232af] | 375 | v->data=omStrDup(d_value.dptr); |
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[573ae7] | 376 | db->first = 0; |
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| 377 | } |
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| 378 | else |
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| 379 | { |
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[c232af] | 380 | v->data=omStrDup(""); |
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[573ae7] | 381 | db->first = 1; |
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| 382 | } |
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| 383 | |
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[0e1846] | 384 | } |
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| 385 | return v; |
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| 386 | } |
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[6b32990] | 387 | LINKAGE leftv dbRead1(si_link l) |
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[0e1846] | 388 | { |
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[463fb3c] | 389 | return dbRead2(l,NULL); |
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[0e1846] | 390 | } |
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[92e539] | 391 | //**************************************************************************/ |
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[6b32990] | 392 | LINKAGE BOOLEAN dbWrite(si_link l, leftv key) |
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[0e1846] | 393 | { |
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[573ae7] | 394 | DBM_info *db = (DBM_info *)l->data; |
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[0e1846] | 395 | BOOLEAN b=TRUE; |
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[92e539] | 396 | register int ret; |
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| 397 | |
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[573ae7] | 398 | // database is opened |
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| 399 | if((key!=NULL) && (key->Typ()==STRING_CMD) ) |
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[a3bc95e] | 400 | { |
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[573ae7] | 401 | if (key->next!=NULL) // have a second parameter ? |
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| 402 | { |
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| 403 | if(key->next->Typ()==STRING_CMD) // replace (key,value) |
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| 404 | { |
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| 405 | datum d_key, d_value; |
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| 406 | |
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| 407 | d_key.dptr = (char *)key->Data(); |
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| 408 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 409 | d_value.dptr = (char *)key->next->Data(); |
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| 410 | d_value.dsize = strlen(d_value.dptr)+1; |
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| 411 | ret = dbm_store(db->db, d_key, d_value, DBM_REPLACE); |
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| 412 | if(!ret ) |
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| 413 | b=FALSE; |
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| 414 | else |
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| 415 | { |
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| 416 | if(dbm_error(db->db)) |
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| 417 | { |
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| 418 | Werror("DBM link I/O error. Is '%s' readonly?", l->name); |
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| 419 | dbm_clearerr(db->db); |
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| 420 | } |
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| 421 | } |
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[92e539] | 422 | } |
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[573ae7] | 423 | } |
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| 424 | else |
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| 425 | { // delete (key) |
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| 426 | datum d_key; |
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| 427 | |
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| 428 | d_key.dptr = (char *)key->Data(); |
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| 429 | d_key.dsize = strlen(d_key.dptr)+1; |
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| 430 | dbm_delete(db->db, d_key); |
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| 431 | b=FALSE; |
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[0e1846] | 432 | } |
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| 433 | } |
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| 434 | else |
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| 435 | { |
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[1fc83c0] | 436 | WerrorS("write(`DBM link`,`key string` [,`data string`]) expected"); |
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[0e1846] | 437 | } |
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| 438 | return b; |
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| 439 | } |
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[92e539] | 440 | //**************************************************************************/ |
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[1fc83c0] | 441 | //char *dbStatus(si_link l, char *request) |
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| 442 | //{ |
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| 443 | // if (strcmp(request, "read") == 0) |
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| 444 | // { |
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| 445 | // if (SI_LINK_R_OPEN_P(l)) |
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| 446 | // return "ready"; |
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| 447 | // else |
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| 448 | // return "not ready"; |
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| 449 | // } |
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| 450 | // else if (strcmp(request, "write") == 0) |
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| 451 | // { |
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| 452 | // if (SI_LINK_W_OPEN_P(l)) |
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| 453 | // return "ready"; |
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| 454 | // else |
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| 455 | // return "not ready"; |
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| 456 | // } |
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| 457 | // else return "unknown status request"; |
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| 458 | //} |
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[92e539] | 459 | //**************************************************************************/ |
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[6b32990] | 460 | |
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[fcafdb] | 461 | #endif /* USE_GDBM */ |
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[92e539] | 462 | #endif /* HAVE_DBM */ |
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