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