[1022] | 1 | /* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc. |
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| 2 | See the COPYRIGHT file for more information. */ |
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| 3 | |
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| 4 | #include "config.h" |
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| 5 | #include "dapparselex.h" |
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| 6 | |
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| 7 | /* Forward */ |
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| 8 | |
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| 9 | static void addedges(OCnode* node); |
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| 10 | static void setroot(OCnode*,OClist*); |
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| 11 | static int isglobalname(char* name); |
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| 12 | static OCnode* newocnode(char* name, OCtype octype, DAPparsestate* state); |
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| 13 | static OCtype octypefor(Object etype); |
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| 14 | static char* scopeduplicates(OClist* list); |
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| 15 | static int check_int32(char* val, long* value); |
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| 16 | |
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| 17 | |
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| 18 | /****************************************************/ |
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| 19 | |
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| 20 | /* Switch to DAS parsing SCAN_WORD definition */ |
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| 21 | |
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| 22 | /* Use the initial keyword to indicate what we are parsing */ |
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| 23 | void |
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| 24 | dap_tagparse(DAPparsestate* state, int kind) |
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| 25 | { |
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| 26 | switch (kind) { |
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| 27 | case SCAN_DATASET: |
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| 28 | case SCAN_ERROR: |
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| 29 | break; |
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| 30 | case SCAN_ATTR: |
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| 31 | dapsetwordchars(state->lexstate,1); |
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| 32 | break; |
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| 33 | default: |
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| 34 | fprintf(stderr,"tagparse: Unknown tag argument: %d\n",kind); |
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| 35 | } |
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| 36 | } |
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| 37 | |
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| 38 | |
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| 39 | Object |
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| 40 | dap_datasetbody(DAPparsestate* state, Object name, Object decls) |
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| 41 | { |
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| 42 | OCnode* root = newocnode((char*)name,OC_Dataset,state); |
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| 43 | root->subnodes = (OClist*)decls; |
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| 44 | OCASSERT((state->root == NULL)); |
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| 45 | state->root = root; |
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| 46 | state->root->root = state->root; /* make sure to cross link */ |
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| 47 | addedges(root); |
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| 48 | setroot(root,state->ocnodes); |
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| 49 | return NULL; |
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| 50 | } |
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| 51 | |
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| 52 | Object |
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| 53 | dap_attributebody(DAPparsestate* state, Object attrlist) |
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| 54 | { |
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| 55 | OCnode* node = newocnode(NULL,OC_Attributeset,state); |
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| 56 | OCASSERT((state->root == NULL)); |
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| 57 | state->root = node; |
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| 58 | /* make sure to cross link */ |
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| 59 | state->root->root = state->root; |
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| 60 | node->subnodes = (OClist*)attrlist; |
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| 61 | addedges(node); |
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| 62 | return NULL; |
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| 63 | } |
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| 64 | |
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| 65 | void |
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| 66 | dap_errorbody(DAPparsestate* state, |
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| 67 | Object code, Object msg, Object ptype, Object prog) |
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| 68 | { |
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| 69 | state->svcerror = 1; |
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| 70 | state->code = nulldup((char*)code); |
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| 71 | state->message = nulldup((char*)msg); |
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| 72 | /* Ignore ptype and prog for now */ |
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| 73 | } |
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| 74 | |
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| 75 | void |
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| 76 | dap_unrecognizedresponse(DAPparsestate* state) |
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| 77 | { |
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| 78 | /* see if this is an HTTP error */ |
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| 79 | unsigned int httperr = 0; |
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| 80 | int i; |
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| 81 | char iv[32]; |
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| 82 | sscanf(state->lexstate->input,"%u ",&httperr); |
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| 83 | sprintf(iv,"%u",httperr); |
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| 84 | state->lexstate->next = state->lexstate->input; |
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| 85 | /* Limit the amount of input to prevent runaway */ |
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| 86 | for(i=0;i<4096;i++) {if(state->lexstate->input[i] == '\0') break;} |
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| 87 | state->lexstate->input[i] = '\0'; |
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| 88 | dap_errorbody(state,iv,state->lexstate->input,NULL,NULL); |
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| 89 | } |
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| 90 | |
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| 91 | Object |
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| 92 | dap_declarations(DAPparsestate* state, Object decls, Object decl) |
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| 93 | { |
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| 94 | OClist* alist = (OClist*)decls; |
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| 95 | if(alist == NULL) |
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| 96 | alist = oclistnew(); |
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| 97 | else |
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| 98 | oclistpush(alist,(ocelem)decl); |
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| 99 | return alist; |
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| 100 | } |
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| 101 | |
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| 102 | Object |
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| 103 | dap_arraydecls(DAPparsestate* state, Object arraydecls, Object arraydecl) |
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| 104 | { |
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| 105 | OClist* alist = (OClist*)arraydecls; |
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| 106 | if(alist == NULL) |
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| 107 | alist = oclistnew(); |
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| 108 | else |
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| 109 | oclistpush(alist,(ocelem)arraydecl); |
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| 110 | return alist; |
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| 111 | } |
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| 112 | |
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| 113 | Object |
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| 114 | dap_arraydecl(DAPparsestate* state, Object name, Object size) |
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| 115 | { |
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| 116 | long value; |
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| 117 | OCnode* dim; |
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| 118 | if(!check_int32(size,&value)) |
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| 119 | dap_parse_error(state,"Dimension not an integer"); |
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| 120 | if(name != NULL) |
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| 121 | dim = newocnode((char*)name,OC_Dimension,state); |
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| 122 | else |
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| 123 | dim = newocnode(NULL,OC_Dimension,state); |
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| 124 | dim->dim.declsize = value; |
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| 125 | return dim; |
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| 126 | } |
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| 127 | |
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| 128 | Object |
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| 129 | dap_attrlist(DAPparsestate* state, Object attrlist, Object attrtuple) |
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| 130 | { |
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| 131 | OClist* alist = (OClist*)attrlist; |
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| 132 | if(alist == NULL) |
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| 133 | alist = oclistnew(); |
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| 134 | else { |
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| 135 | char* dupname; |
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| 136 | if(attrtuple != NULL) {/* NULL=>alias encountered, ignore */ |
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| 137 | oclistpush(alist,(ocelem)attrtuple); |
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| 138 | if((dupname=scopeduplicates(alist))!=NULL) { |
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| 139 | dap_parse_error(state,"Duplicate attribute names in same scope: %s",dupname); |
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| 140 | /* Remove this attribute */ |
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| 141 | oclistpop(alist); |
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| 142 | } |
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| 143 | } |
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| 144 | } |
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| 145 | return alist; |
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| 146 | } |
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| 147 | |
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| 148 | Object |
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| 149 | dap_attrvalue(DAPparsestate* state, Object valuelist, Object value, Object etype) |
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| 150 | { |
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| 151 | OClist* alist = (OClist*)valuelist; |
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| 152 | if(alist == NULL) alist = oclistnew(); |
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| 153 | /* Watch out for null values */ |
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| 154 | if(value == NULL) value = ""; |
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| 155 | oclistpush(alist,(ocelem)strdup(value)); |
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| 156 | return alist; |
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| 157 | } |
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| 158 | |
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| 159 | Object |
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| 160 | dap_attribute(DAPparsestate* state, Object name, Object values, Object etype) |
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| 161 | { |
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| 162 | OCnode* att; |
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| 163 | att = newocnode((char*)name,OC_Attribute,state); |
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| 164 | att->etype = octypefor(etype); |
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| 165 | att->att.values = (OClist*)values; |
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| 166 | return att; |
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| 167 | } |
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| 168 | |
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| 169 | Object |
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| 170 | dap_attrset(DAPparsestate* state, Object name, Object attributes) |
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| 171 | { |
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| 172 | OCnode* attset; |
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| 173 | attset = newocnode((char*)name,OC_Attributeset,state); |
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| 174 | /* Check var set vs global set */ |
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| 175 | attset->att.isglobal = isglobalname(name); |
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| 176 | attset->subnodes = (OClist*)attributes; |
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| 177 | addedges(attset); |
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| 178 | return attset; |
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| 179 | } |
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| 180 | |
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| 181 | static int |
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| 182 | isglobalname(char* name) |
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| 183 | { |
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| 184 | int len = strlen(name); |
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| 185 | int glen = strlen("global"); |
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| 186 | char* p; |
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| 187 | if(len < glen) return 0; |
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| 188 | p = name + (len - glen); |
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| 189 | if(strcasecmp(p,"global") != 0) |
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| 190 | return 0; |
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| 191 | return 1; |
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| 192 | } |
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| 193 | |
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| 194 | #if 0 |
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| 195 | static int |
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| 196 | isnumber(const char* text) |
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| 197 | { |
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| 198 | for(;*text;text++) {if(!isdigit(*text)) return 0;} |
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| 199 | return 1; |
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| 200 | } |
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| 201 | #endif |
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| 202 | |
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| 203 | static void |
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| 204 | dimension(OCnode* node, OClist* dimensions) |
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| 205 | { |
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| 206 | unsigned int i; |
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| 207 | unsigned int rank = oclistlength(dimensions); |
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| 208 | node->array.dimensions = (OClist*)dimensions; |
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| 209 | node->array.rank = rank; |
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| 210 | for(i=0;i<rank;i++) { |
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| 211 | OCnode* dim = (OCnode*)oclistget(node->array.dimensions,i); |
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| 212 | dim->dim.array = node; |
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| 213 | dim->dim.arrayindex = i; |
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| 214 | #if 0 |
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| 215 | if(dim->name == NULL) { |
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| 216 | dim->dim.anonymous = 1; |
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| 217 | dim->name = dimnameanon(node->name,i); |
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| 218 | } |
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| 219 | #endif |
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| 220 | } |
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| 221 | } |
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| 222 | |
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| 223 | char* |
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| 224 | dimnameanon(char* basename, unsigned int index) |
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| 225 | { |
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| 226 | char name[64]; |
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| 227 | sprintf(name,"%s_%d",basename,index); |
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| 228 | return strdup(name); |
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| 229 | } |
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| 230 | |
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| 231 | Object |
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| 232 | dap_makebase(DAPparsestate* state, Object name, Object etype, Object dimensions) |
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| 233 | { |
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| 234 | OCnode* node; |
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| 235 | node = newocnode((char*)name,OC_Primitive,state); |
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| 236 | node->etype = octypefor(etype); |
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| 237 | dimension(node,(OClist*)dimensions); |
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| 238 | return node; |
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| 239 | } |
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| 240 | |
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| 241 | Object |
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| 242 | dap_makestructure(DAPparsestate* state, Object name, Object dimensions, Object fields) |
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| 243 | { |
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| 244 | OCnode* node; |
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| 245 | char* dupname; |
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| 246 | if((dupname=scopeduplicates((OClist*)fields))!= NULL) { |
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| 247 | dap_parse_error(state,"Duplicate structure field names in same scope: %s.%s",(char*)name,dupname); |
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| 248 | return (Object)NULL; |
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| 249 | } |
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| 250 | node = newocnode(name,OC_Structure,state); |
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| 251 | node->subnodes = fields; |
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| 252 | dimension(node,(OClist*)dimensions); |
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| 253 | addedges(node); |
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| 254 | return node; |
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| 255 | } |
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| 256 | |
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| 257 | Object |
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| 258 | dap_makesequence(DAPparsestate* state, Object name, Object members) |
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| 259 | { |
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| 260 | OCnode* node; |
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| 261 | char* dupname; |
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| 262 | if((dupname=scopeduplicates((OClist*)members)) != NULL) { |
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| 263 | dap_parse_error(state,"Duplicate sequence member names in same scope: %s.%s",(char*)name,dupname); |
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| 264 | return (Object)NULL; |
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| 265 | } |
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| 266 | node = newocnode(name,OC_Sequence,state); |
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| 267 | node->subnodes = members; |
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| 268 | addedges(node); |
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| 269 | return node; |
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| 270 | } |
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| 271 | |
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| 272 | Object |
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| 273 | dap_makegrid(DAPparsestate* state, Object name, Object arraydecl, Object mapdecls) |
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| 274 | { |
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| 275 | OCnode* node; |
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| 276 | /* Check for duplicate map names */ |
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| 277 | char* dupname; |
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| 278 | if((dupname=scopeduplicates((OClist*)mapdecls)) != NULL) { |
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| 279 | dap_parse_error(state,"Duplicate grid map names in same scope: %s.%s",(char*)name,dupname); |
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| 280 | return (Object)NULL; |
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| 281 | } |
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| 282 | node = newocnode(name,OC_Grid,state); |
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| 283 | node->subnodes = (OClist*)mapdecls; |
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| 284 | oclistinsert(node->subnodes,0,(ocelem)arraydecl); |
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| 285 | addedges(node); |
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| 286 | return node; |
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| 287 | } |
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| 288 | |
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| 289 | static void |
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| 290 | addedges(OCnode* node) |
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| 291 | { |
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| 292 | unsigned int i; |
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| 293 | if(node->subnodes == NULL) return; |
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| 294 | for(i=0;i<oclistlength(node->subnodes);i++) { |
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| 295 | OCnode* subnode = (OCnode*)oclistget(node->subnodes,i); |
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| 296 | subnode->container = node; |
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| 297 | } |
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| 298 | } |
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| 299 | |
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| 300 | static void |
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| 301 | setroot(OCnode* root, OClist* ocnodes) |
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| 302 | { |
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| 303 | int i; |
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| 304 | for(i=0;i<oclistlength(ocnodes);i++) { |
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| 305 | OCnode* node = (OCnode*)oclistget(ocnodes,i); |
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| 306 | node->root = root; |
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| 307 | } |
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| 308 | } |
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| 309 | |
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| 310 | int |
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| 311 | daperror(DAPparsestate* state, const char* msg) |
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| 312 | { |
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| 313 | dap_parse_error(state,msg); |
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| 314 | return 0; |
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| 315 | } |
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| 316 | |
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| 317 | static char* |
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| 318 | flatten(char* s, char* tmp, int tlen) |
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| 319 | { |
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| 320 | int c; |
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| 321 | char* p,*q; |
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| 322 | strncpy(tmp,s,tlen); |
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| 323 | tmp[tlen] = '\0'; |
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| 324 | p = (q = tmp); |
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| 325 | while((c=*p++)) { |
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| 326 | switch (c) { |
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| 327 | case '\r': case '\n': break; |
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| 328 | case '\t': *q++ = ' '; break; |
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| 329 | case ' ': if(*p != ' ') *q++ = c; break; |
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| 330 | default: *q++ = c; |
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| 331 | } |
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| 332 | } |
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| 333 | *q = '\0'; |
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| 334 | return tmp; |
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| 335 | } |
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| 336 | |
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| 337 | /* Create an ocnode and capture in the state->ocnode list */ |
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| 338 | static OCnode* |
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| 339 | newocnode(char* name, OCtype octype, DAPparsestate* state) |
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| 340 | { |
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| 341 | OCnode* node = ocmakenode(name,octype,state->root); |
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| 342 | oclistpush(state->ocnodes,(ocelem)node); |
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| 343 | return node; |
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| 344 | } |
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| 345 | |
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| 346 | static int |
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| 347 | check_int32(char* val, long* value) |
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| 348 | { |
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| 349 | char* ptr; |
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| 350 | int ok = 1; |
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| 351 | long iv = strtol(val,&ptr,0); /* 0=>auto determine base */ |
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| 352 | if((iv == 0 && val == ptr) || *ptr != '\0') {ok=0; iv=1;} |
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| 353 | else if(iv > OC_INT32_MAX || iv < OC_INT32_MIN) ok=0; |
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| 354 | if(value != NULL) *value = iv; |
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| 355 | return ok; |
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| 356 | } |
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| 357 | |
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| 358 | static char* |
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| 359 | scopeduplicates(OClist* list) |
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| 360 | { |
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| 361 | unsigned int i,j; |
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| 362 | for(i=0;i<oclistlength(list);i++) { |
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| 363 | OCnode* io = (OCnode*)oclistget(list,i); |
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| 364 | for(j=i+1;j<oclistlength(list);j++) { |
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| 365 | OCnode* jo = (OCnode*)oclistget(list,j); |
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| 366 | if(strcmp(io->name,jo->name)==0) |
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| 367 | return io->name; |
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| 368 | } |
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| 369 | } |
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| 370 | return NULL; |
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| 371 | } |
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| 372 | |
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| 373 | static OCtype |
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| 374 | octypefor(Object etype) |
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| 375 | { |
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| 376 | switch ((long)etype) { |
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| 377 | case SCAN_BYTE: return OC_Byte; |
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| 378 | case SCAN_INT16: return OC_Int16; |
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| 379 | case SCAN_UINT16: return OC_UInt16; |
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| 380 | case SCAN_INT32: return OC_Int32; |
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| 381 | case SCAN_UINT32: return OC_UInt32; |
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| 382 | case SCAN_FLOAT32: return OC_Float32; |
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| 383 | case SCAN_FLOAT64: return OC_Float64; |
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| 384 | case SCAN_URL: return OC_URL; |
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| 385 | case SCAN_STRING: return OC_String; |
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| 386 | default: abort(); |
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| 387 | } |
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| 388 | return OC_NAT; |
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| 389 | } |
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| 390 | |
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| 391 | void |
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| 392 | dap_parse_error(DAPparsestate* state, const char *fmt, ...) |
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| 393 | { |
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| 394 | size_t len, suffixlen, prefixlen; |
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| 395 | va_list argv; |
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| 396 | char* tmp = NULL; |
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| 397 | va_start(argv,fmt); |
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| 398 | (void) vfprintf(stderr,fmt,argv) ; |
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| 399 | (void) fputc('\n',stderr) ; |
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| 400 | len = strlen(state->lexstate->input); |
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| 401 | suffixlen = strlen(state->lexstate->next); |
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| 402 | prefixlen = (len - suffixlen); |
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| 403 | tmp = (char*)ocmalloc(len+1); |
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| 404 | flatten(state->lexstate->input,tmp,prefixlen); |
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| 405 | (void) fprintf(stderr,"context: %s",tmp); |
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| 406 | flatten(state->lexstate->next,tmp,suffixlen); |
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| 407 | (void) fprintf(stderr,"^%s\n",tmp); |
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| 408 | (void) fflush(stderr); /* to ensure log files are current */ |
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| 409 | ocfree(tmp); |
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| 410 | } |
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| 411 | |
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| 412 | static void |
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| 413 | dap_parse_cleanup(DAPparsestate* state) |
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| 414 | { |
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| 415 | daplexcleanup(&state->lexstate); |
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| 416 | if(state->ocnodes != NULL) ocfreenodes(state->ocnodes); |
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| 417 | state->ocnodes = NULL; |
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| 418 | free(state); |
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| 419 | } |
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| 420 | |
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| 421 | static DAPparsestate* |
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| 422 | dap_parse_init(char* buf) |
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| 423 | { |
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| 424 | DAPparsestate* state = (DAPparsestate*)ocmalloc(sizeof(DAPparsestate)); /*ocmalloc zeros*/ |
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| 425 | MEMCHECK(state,(DAPparsestate*)NULL); |
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| 426 | if(buf==NULL) { |
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| 427 | dap_parse_error(state,"dap_parse_init: no input buffer"); |
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| 428 | dap_parse_cleanup(state); |
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| 429 | return NULL; |
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| 430 | } |
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| 431 | daplexinit(buf,&state->lexstate); |
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| 432 | return state; |
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| 433 | } |
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| 434 | |
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| 435 | /* Wrapper for dapparse */ |
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| 436 | OCerror |
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| 437 | DAPparse(OCstate* conn, OCtree* tree, char* parsestring) |
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| 438 | { |
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| 439 | DAPparsestate* state = dap_parse_init(parsestring); |
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| 440 | int parseresult; |
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| 441 | OCerror ocerr = OC_NOERR; |
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| 442 | state->ocnodes = oclistnew(); |
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| 443 | state->conn = conn; |
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| 444 | if(ocdebug >= 2) |
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| 445 | dapdebug = 1; |
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| 446 | parseresult = dapparse(state); |
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| 447 | if(parseresult == 0) {/* 0 => parse ok */ |
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| 448 | /* Check to see if we ended up parsing an error message */ |
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| 449 | if(state->svcerror) { |
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| 450 | conn->error.code = nulldup(state->code); |
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| 451 | conn->error.message = nulldup(state->message); |
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| 452 | tree->root = NULL; |
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| 453 | /* Attempt to further decipher the error code */ |
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| 454 | if(state->code != NULL |
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| 455 | && (strcmp(state->code,"404") == 0 /* tds returns 404 */ |
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| 456 | || strcmp(state->code,"5") == 0)) /* hyrax returns 5 */ |
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| 457 | ocerr = OC_ENOFILE; |
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| 458 | else |
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| 459 | ocerr = OC_EDAPSVC; |
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| 460 | } else { |
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| 461 | OCASSERT((state->root != NULL)); |
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| 462 | tree->root = state->root; |
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| 463 | state->root = NULL; /* avoid reclaim */ |
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| 464 | tree->nodes = state->ocnodes; |
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| 465 | state->ocnodes = NULL; /* avoid reclaim */ |
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| 466 | tree->root->tree = tree; |
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| 467 | ocerr = OC_NOERR; |
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| 468 | } |
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| 469 | } else { /* Parse failed */ |
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| 470 | switch (tree->dxdclass) { |
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| 471 | case OCDAS: ocerr = OC_EDAS; break; |
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| 472 | case OCDDS: ocerr = OC_EDDS; break; |
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| 473 | case OCDATADDS: ocerr = OC_EDATADDS; break; |
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| 474 | default: ocerr = OC_EDAPSVC; |
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| 475 | } |
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| 476 | } |
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| 477 | dap_parse_cleanup(state); |
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| 478 | return ocerr; |
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| 479 | } |
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| 480 | |
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