[0e1846] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[32df82] | 4 | |
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[0e1846] | 5 | /* |
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[6ae4f5] | 6 | * ABSTRACT: general interface to links |
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[d754b7] | 7 | */ |
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[0e1846] | 8 | |
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| 9 | #include <stdio.h> |
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| 10 | #include <string.h> |
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[644227] | 11 | #include <sys/types.h> |
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| 12 | #include <sys/stat.h> |
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| 13 | #include <unistd.h> |
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| 14 | |
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[16f511] | 15 | #ifdef HAVE_CONFIG_H |
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[762407] | 16 | #include "config.h" |
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[16f511] | 17 | #endif /* HAVE_CONFIG_H */ |
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[b1dfaf] | 18 | #include <kernel/mod2.h> |
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[599326] | 19 | #include <Singular/tok.h> |
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[0fb34ba] | 20 | #include <misc/options.h> |
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[b1dfaf] | 21 | #include <omalloc/omalloc.h> |
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[599326] | 22 | #include <kernel/febase.h> |
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| 23 | #include <Singular/subexpr.h> |
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| 24 | #include <Singular/ipid.h> |
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[44ca2f] | 25 | #include <Singular/links/silink.h> |
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[599326] | 26 | #include <Singular/ipshell.h> |
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[0fb34ba] | 27 | #include <polys/matpol.h> |
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| 28 | #include <polys/monomials/ring.h> |
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[599326] | 29 | #include <Singular/lists.h> |
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| 30 | #include <kernel/ideals.h> |
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[0fb34ba] | 31 | #include <coeffs/numbers.h> |
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| 32 | #include <misc/intvec.h> |
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[47367fd] | 33 | #include <Singular/links/ssiLink.h> |
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| 34 | #include <Singular/links/pipeLink.h> |
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[bdda8c2] | 35 | #include <Singular/si_signals.h> |
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[c90500] | 36 | #include "feOpt.h" |
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[286bd57] | 37 | |
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[0c7cb8] | 38 | // #ifdef HAVE_DBM |
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| 39 | // #ifdef ix86_Win |
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| 40 | // #define USE_GDBM |
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| 41 | // #endif |
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| 42 | // #endif |
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[50cbdc] | 43 | |
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[c232af] | 44 | omBin s_si_link_extension_bin = omGetSpecBin(sizeof(s_si_link_extension)); |
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| 45 | omBin sip_link_bin = omGetSpecBin(sizeof(sip_link)); |
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| 46 | omBin ip_link_bin = omGetSpecBin(sizeof(ip_link)); |
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| 47 | |
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[0e1846] | 48 | /* ====================================================================== */ |
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[4da485] | 49 | static si_link_extension slTypeInit(si_link_extension s, const char* type); |
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[0e1846] | 50 | si_link_extension si_link_root=NULL; |
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[d754b7] | 51 | |
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[0e1846] | 52 | BOOLEAN slInit(si_link l, char *istr) |
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| 53 | { |
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[d754b7] | 54 | char *type = NULL, *mode = NULL, *name = NULL; |
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| 55 | int i = 0, j; |
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[c20843] | 56 | |
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[d754b7] | 57 | // set mode and type |
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| 58 | if (istr != NULL) |
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[0e1846] | 59 | { |
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[d754b7] | 60 | // find the first colon char in istr |
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| 61 | i = 0; |
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| 62 | while (istr[i] != ':' && istr[i] != '\0') i++; |
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| 63 | if (istr[i] == ':') |
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[0e1846] | 64 | { |
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[d754b7] | 65 | // if found, set type |
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| 66 | if (i > 0) |
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[0e1846] | 67 | { |
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[d754b7] | 68 | istr[i] = '\0'; |
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[c232af] | 69 | type = omStrDup(istr); |
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[d754b7] | 70 | istr[i] = ':'; |
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[0e1846] | 71 | } |
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[d754b7] | 72 | // and check for mode |
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| 73 | j = ++i; |
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| 74 | while (istr[j] != ' ' && istr[j] != '\0') j++; |
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| 75 | if (j > i) |
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[0e1846] | 76 | { |
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[c232af] | 77 | mode = omStrDup(&(istr[i])); |
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[d754b7] | 78 | mode[j - i] = '\0'; |
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[0e1846] | 79 | } |
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[d754b7] | 80 | // and for the name |
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| 81 | while (istr[j] == ' '&& istr[j] != '\0') j++; |
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[c232af] | 82 | if (istr[j] != '\0') name = omStrDup(&(istr[j])); |
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[d754b7] | 83 | } |
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| 84 | else // no colon find -- string is entire name |
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| 85 | { |
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| 86 | j=0; |
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| 87 | while (istr[j] == ' '&& istr[j] != '\0') j++; |
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[c232af] | 88 | if (istr[j] != '\0') name = omStrDup(&(istr[j])); |
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[0e1846] | 89 | } |
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| 90 | } |
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[e6969d] | 91 | |
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[d754b7] | 92 | // set the link extension |
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| 93 | if (type != NULL) |
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[0e1846] | 94 | { |
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[d754b7] | 95 | si_link_extension s = si_link_root; |
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[6b32990] | 96 | si_link_extension prev = s; |
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[c20843] | 97 | |
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[6b32990] | 98 | while (strcmp(s->type, type) != 0) |
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| 99 | { |
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[50cbdc] | 100 | if (s->next == NULL) |
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[6b32990] | 101 | { |
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| 102 | prev = s; |
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| 103 | s = NULL; |
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| 104 | break; |
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| 105 | } |
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| 106 | else |
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| 107 | { |
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| 108 | s = s->next; |
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| 109 | } |
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| 110 | } |
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[d754b7] | 111 | |
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| 112 | if (s != NULL) |
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| 113 | l->m = s; |
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| 114 | else |
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[0e1846] | 115 | { |
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[6b32990] | 116 | l->m = slTypeInit(prev, type); |
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[0e1846] | 117 | } |
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[c232af] | 118 | omFree(type); |
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[0e1846] | 119 | } |
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[d754b7] | 120 | else |
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| 121 | l->m = si_link_root; |
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| 122 | |
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[6b32990] | 123 | if (l->m == NULL) return TRUE; |
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[50cbdc] | 124 | |
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[c232af] | 125 | l->name = (name != NULL ? name : omStrDup("")); |
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| 126 | l->mode = (mode != NULL ? mode : omStrDup("")); |
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[d754b7] | 127 | l->ref = 1; |
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| 128 | return FALSE; |
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[0e1846] | 129 | } |
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| 130 | |
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[e6969d] | 131 | void slCleanUp(si_link l) |
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[0e1846] | 132 | { |
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[e6969d] | 133 | (l->ref)--; |
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[d754b7] | 134 | if (l->ref == 0) |
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[0e1846] | 135 | { |
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[80419f] | 136 | if (SI_LINK_OPEN_P(l)) |
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| 137 | { |
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| 138 | if (l->m->Kill != NULL) l->m->Kill(l); |
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| 139 | else if (l->m->Close != NULL) l->m->Close(l); |
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| 140 | } |
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[c232af] | 141 | omFree((ADDRESS)l->name); |
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| 142 | omFree((ADDRESS)l->mode); |
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[d754b7] | 143 | memset((void *) l, 0, sizeof(ip_link)); |
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[e6969d] | 144 | } |
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| 145 | } |
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| 146 | |
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| 147 | void slKill(si_link l) |
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| 148 | { |
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[d754b7] | 149 | slCleanUp(l); |
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[e6969d] | 150 | if (l->ref == 0) |
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[c232af] | 151 | omFreeBin((ADDRESS)l, ip_link_bin); |
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[0e1846] | 152 | } |
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| 153 | |
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[9db0567] | 154 | const char* slStatus(si_link l, const char *request) |
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[0e1846] | 155 | { |
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[d754b7] | 156 | if (l == NULL) return "empty link"; |
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| 157 | else if (l->m == NULL) return "unknown link type"; |
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| 158 | else if (strcmp(request, "type") == 0) return l->m->type; |
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| 159 | else if (strcmp(request, "mode") == 0) return l->mode; |
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| 160 | else if (strcmp(request, "name") == 0) return l->name; |
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[644227] | 161 | else if (strcmp(request, "exists") ==0) |
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| 162 | { |
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| 163 | struct stat buf; |
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[bdda8c2] | 164 | if (si_lstat(l->name,&buf)==0) return "yes"; |
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[644227] | 165 | else return "no"; |
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| 166 | } |
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[d754b7] | 167 | else if (strcmp(request, "open") == 0) |
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| 168 | { |
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| 169 | if (SI_LINK_OPEN_P(l)) return "yes"; |
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| 170 | else return "no"; |
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| 171 | } |
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| 172 | else if (strcmp(request, "openread") == 0) |
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| 173 | { |
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| 174 | if (SI_LINK_R_OPEN_P(l)) return "yes"; |
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| 175 | else return "no"; |
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| 176 | } |
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| 177 | else if (strcmp(request, "openwrite") == 0) |
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| 178 | { |
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| 179 | if (SI_LINK_W_OPEN_P(l)) return "yes"; |
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| 180 | else return "no"; |
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| 181 | } |
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| 182 | else if (l->m->Status == NULL) return "unknown status request"; |
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| 183 | else return l->m->Status(l, request); |
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[0e1846] | 184 | } |
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| 185 | |
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[d754b7] | 186 | //-------------------------------------------------------------------------- |
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[b5f276e] | 187 | BOOLEAN slOpen(si_link l, short flag, leftv h) |
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[0e1846] | 188 | { |
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[47a616d] | 189 | BOOLEAN res = TRUE; |
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| 190 | if (l!=NULL) |
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| 191 | { |
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[c20843] | 192 | |
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[47a616d] | 193 | if (l->m == NULL) slInit(l, ((char*)"")); |
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[d754b7] | 194 | |
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[c90500] | 195 | if (feOptValue(FE_OPT_NO_SHELL)) {WerrorS("no links allowed");return TRUE;} |
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| 196 | |
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[47a616d] | 197 | const char *c="_";; |
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| 198 | if (h!=NULL) c=h->Name(); |
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| 199 | |
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| 200 | if (SI_LINK_OPEN_P(l)) |
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| 201 | { |
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| 202 | Warn("open: link of type: %s, mode: %s, name: %s is already open", |
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[d754b7] | 203 | l->m->type, l->mode, l->name); |
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[47a616d] | 204 | return FALSE; |
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| 205 | } |
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| 206 | else if (l->m->Open != NULL) |
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| 207 | { |
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| 208 | res = l->m->Open(l, flag, h); |
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| 209 | if (res) |
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| 210 | Werror("open: Error for link %s of type: %s, mode: %s, name: %s", |
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| 211 | c, l->m->type, l->mode, l->name); |
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| 212 | } |
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[d754b7] | 213 | } |
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| 214 | return res; |
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[0e1846] | 215 | } |
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| 216 | |
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[df326b] | 217 | BOOLEAN slPrepClose(si_link l) |
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| 218 | { |
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| 219 | |
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| 220 | if(! SI_LINK_OPEN_P(l)) |
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| 221 | return FALSE; |
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| 222 | |
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| 223 | BOOLEAN res = TRUE; |
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| 224 | if (l->m->PrepClose != NULL) |
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| 225 | { |
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| 226 | res = l->m->PrepClose(l); |
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| 227 | if (res) |
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| 228 | Werror("close: Error for link of type: %s, mode: %s, name: %s", |
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| 229 | l->m->type, l->mode, l->name); |
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| 230 | } |
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| 231 | return res; |
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| 232 | } |
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| 233 | |
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[0e1846] | 234 | BOOLEAN slClose(si_link l) |
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| 235 | { |
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[d754b7] | 236 | |
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[1fc83c0] | 237 | if(! SI_LINK_OPEN_P(l)) |
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| 238 | return FALSE; |
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[c20843] | 239 | |
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[47a616d] | 240 | BOOLEAN res = TRUE; |
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| 241 | if (l->m->Close != NULL) |
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| 242 | { |
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| 243 | res = l->m->Close(l); |
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| 244 | if (res) |
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| 245 | Werror("close: Error for link of type: %s, mode: %s, name: %s", |
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[d754b7] | 246 | l->m->type, l->mode, l->name); |
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[47a616d] | 247 | } |
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[d754b7] | 248 | return res; |
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[0e1846] | 249 | } |
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| 250 | |
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[d754b7] | 251 | leftv slRead(si_link l, leftv a) |
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[0e1846] | 252 | { |
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| 253 | leftv v = NULL; |
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| 254 | if( ! SI_LINK_R_OPEN_P(l)) // open r ? |
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| 255 | { |
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[fcafdb] | 256 | #ifdef HAVE_DBM |
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| 257 | #ifdef USE_GDBM |
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| 258 | if (! SI_LINK_CLOSE_P(l)) |
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| 259 | { |
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[50cbdc] | 260 | if (slClose(l)) return NULL; |
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[fcafdb] | 261 | } |
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| 262 | #endif |
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| 263 | #endif |
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[b5f276e] | 264 | if (slOpen(l, SI_LINK_READ,NULL)) return NULL; |
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[0e1846] | 265 | } |
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[d754b7] | 266 | |
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| 267 | if (SI_LINK_R_OPEN_P(l)) |
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[0e1846] | 268 | { // open r |
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| 269 | if (a==NULL) |
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| 270 | { |
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[d754b7] | 271 | if (l->m->Read != NULL) v = l->m->Read(l); |
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[0e1846] | 272 | } |
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| 273 | else |
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| 274 | { |
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[d754b7] | 275 | if (l->m->Read2 != NULL) v = l->m->Read2(l,a); |
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[0e1846] | 276 | } |
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| 277 | } |
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[d754b7] | 278 | else |
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[0e1846] | 279 | { |
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[d754b7] | 280 | Werror("read: Error to open link of type %s, mode: %s, name: %s for reading", |
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| 281 | l->m->type, l->mode, l->name); |
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| 282 | return NULL; |
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[0e1846] | 283 | } |
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[c20843] | 284 | |
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[d754b7] | 285 | // here comes the eval: |
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[1fc83c0] | 286 | if (v != NULL) |
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[42e60f] | 287 | { |
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| 288 | if (v->Eval() && !errorreported) |
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| 289 | WerrorS("eval: failed"); |
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| 290 | } |
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[d754b7] | 291 | else |
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| 292 | Werror("read: Error for link of type %s, mode: %s, name: %s", |
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| 293 | l->m->type, l->mode, l->name); |
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[0e1846] | 294 | return v; |
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| 295 | } |
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| 296 | |
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| 297 | BOOLEAN slWrite(si_link l, leftv v) |
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| 298 | { |
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[d754b7] | 299 | BOOLEAN res; |
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[c20843] | 300 | |
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[0e1846] | 301 | if(! SI_LINK_W_OPEN_P(l)) // open w ? |
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| 302 | { |
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[fcafdb] | 303 | #ifdef HAVE_DBM |
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| 304 | #ifdef USE_GDBM |
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| 305 | if (! SI_LINK_CLOSE_P(l)) |
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| 306 | { |
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[50cbdc] | 307 | if (slClose(l)) return TRUE; |
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[fcafdb] | 308 | } |
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| 309 | #endif |
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| 310 | #endif |
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[b5f276e] | 311 | if (slOpen(l, SI_LINK_WRITE,NULL)) return TRUE; |
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[0e1846] | 312 | } |
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[d754b7] | 313 | |
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[fcafdb] | 314 | if (SI_LINK_W_OPEN_P(l)) |
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[0e1846] | 315 | { // now open w |
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[1fc83c0] | 316 | if (l->m->Write != NULL) |
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| 317 | res = l->m->Write(l,v); |
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| 318 | else |
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| 319 | res = TRUE; |
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[d754b7] | 320 | |
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| 321 | if (res) |
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| 322 | Werror("write: Error for link of type %s, mode: %s, name: %s", |
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| 323 | l->m->type, l->mode, l->name); |
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| 324 | return res; |
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| 325 | } |
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| 326 | else |
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| 327 | { |
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| 328 | Werror("write: Error to open link of type %s, mode: %s, name: %s for writing", |
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| 329 | l->m->type, l->mode, l->name); |
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| 330 | return TRUE; |
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[0e1846] | 331 | } |
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| 332 | } |
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| 333 | |
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[286bd57] | 334 | BOOLEAN slDump(si_link l) |
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| 335 | { |
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[d754b7] | 336 | BOOLEAN res; |
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| 337 | |
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[286bd57] | 338 | if(! SI_LINK_W_OPEN_P(l)) // open w ? |
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| 339 | { |
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[b5f276e] | 340 | if (slOpen(l, SI_LINK_WRITE,NULL)) return TRUE; |
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[286bd57] | 341 | } |
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[d754b7] | 342 | |
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| 343 | if(SI_LINK_W_OPEN_P(l)) |
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[286bd57] | 344 | { // now open w |
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[1fc83c0] | 345 | if (l->m->Dump != NULL) |
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| 346 | res = l->m->Dump(l); |
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| 347 | else |
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| 348 | res = TRUE; |
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[286bd57] | 349 | |
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[d754b7] | 350 | if (res) |
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| 351 | Werror("dump: Error for link of type %s, mode: %s, name: %s", |
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| 352 | l->m->type, l->mode, l->name); |
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[228e0b] | 353 | if (!SI_LINK_R_OPEN_P(l)) slClose(l); // do not close r/w links |
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[d754b7] | 354 | return res; |
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[286bd57] | 355 | } |
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[d754b7] | 356 | else |
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| 357 | { |
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| 358 | Werror("dump: Error to open link of type %s, mode: %s, name: %s for writing", |
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| 359 | l->m->type, l->mode, l->name); |
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| 360 | return TRUE; |
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[286bd57] | 361 | } |
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| 362 | } |
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| 363 | |
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[d754b7] | 364 | BOOLEAN slGetDump(si_link l) |
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[0e1846] | 365 | { |
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[d754b7] | 366 | BOOLEAN res; |
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| 367 | |
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| 368 | if(! SI_LINK_R_OPEN_P(l)) // open r ? |
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[0e1846] | 369 | { |
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[b5f276e] | 370 | if (slOpen(l, SI_LINK_READ,NULL)) return TRUE; |
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[0e1846] | 371 | } |
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[d754b7] | 372 | |
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| 373 | if(SI_LINK_R_OPEN_P(l)) |
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| 374 | { // now open r |
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[1fc83c0] | 375 | if (l->m->GetDump != NULL) |
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| 376 | res = l->m->GetDump(l); |
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| 377 | else |
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| 378 | res = TRUE; |
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[d754b7] | 379 | |
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| 380 | if (res) |
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| 381 | Werror("getdump: Error for link of type %s, mode: %s, name: %s", |
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| 382 | l->m->type, l->mode, l->name); |
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[6d1357] | 383 | //res|=slClose(l); |
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[d754b7] | 384 | return res; |
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[0e1846] | 385 | } |
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[d754b7] | 386 | else |
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[0e1846] | 387 | { |
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[d754b7] | 388 | Werror("dump: Error open link of type %s, mode: %s, name: %s for reading", |
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| 389 | l->m->type, l->mode, l->name); |
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| 390 | return TRUE; |
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[0e1846] | 391 | } |
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| 392 | } |
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[d754b7] | 393 | |
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| 394 | /*------------Initialization at Start-up time------------------------*/ |
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[0e1846] | 395 | |
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[44ca2f] | 396 | #include <Singular/links/slInit.h> |
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[0e1846] | 397 | |
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[6b32990] | 398 | static si_link_extension slTypeInit(si_link_extension s, const char* type) |
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| 399 | { |
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| 400 | assume(s != NULL); |
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| 401 | s->next = NULL; |
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| 402 | si_link_extension ns = (si_link_extension)omAlloc0Bin(s_si_link_extension_bin); |
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[50cbdc] | 403 | |
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[df326b] | 404 | if (0) 0; // dummy |
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[6b32990] | 405 | #ifdef HAVE_DBM |
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[8ed989] | 406 | else if (strcmp(type, "DBM") == 0) |
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[6b32990] | 407 | s->next = slInitDBMExtension(ns); |
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| 408 | #endif |
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[8ed989] | 409 | #if 1 |
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| 410 | else if (strcmp(type, "ssi") == 0) |
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| 411 | s->next = slInitSsiExtension(ns); |
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[4082e8] | 412 | #endif |
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| 413 | #if 1 |
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| 414 | else if (strcmp(type, "|") == 0) |
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| 415 | s->next = slInitPipeExtension(ns); |
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[c20843] | 416 | #endif |
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[8ed989] | 417 | else |
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[6b32990] | 418 | { |
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| 419 | Warn("Found unknown link type: %s", type); |
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| 420 | Warn("Use default link type: %s", si_link_root->type); |
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| 421 | omFreeBin(ns, s_si_link_extension_bin); |
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| 422 | return si_link_root; |
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| 423 | } |
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[50cbdc] | 424 | |
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[6b32990] | 425 | if (s->next == NULL) |
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| 426 | { |
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| 427 | Werror("Can not initialize link type %s", type); |
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| 428 | omFreeBin(ns, s_si_link_extension_bin); |
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| 429 | return NULL; |
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| 430 | } |
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| 431 | return s->next; |
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| 432 | } |
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[0e1846] | 433 | |
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