[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 "ocinternal.h" |
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| 6 | #include "occontent.h" |
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| 7 | #include "ocdebug.h" |
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| 8 | |
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| 9 | /* Mnemonic*/ |
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| 10 | #define ISPACKED 1 |
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| 11 | |
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| 12 | /* Define the skipstate flags */ |
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| 13 | #ifdef OCDEBUG |
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| 14 | typedef enum Skipstate { |
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| 15 | SKIPFIELDS = 1, /* skip instance without leading tag or arraycount */ |
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| 16 | SKIPINSTANCE = 2, /*skip leading sequence tag or array counts */ |
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| 17 | SKIPWHOLE = 4 /* skip complete object */ |
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| 18 | } Skipstate; |
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| 19 | #else |
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| 20 | #define SKIPFIELDS 1 /* skip instance without leading tag or arraycount */ |
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| 21 | #define SKIPINSTANCE 2 /*skip leading sequence tag or array counts */ |
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| 22 | #define SKIPWHOLE 4 /* skip complete object */ |
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| 23 | #endif |
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| 24 | |
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| 25 | /* Forward*/ |
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| 26 | static OCmode modetransition(OCnode*,OCmode); |
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| 27 | static int ocgetsequencetag(XXDR* xdrs); |
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| 28 | static int ocskipcounts(XXDR* xdrs, OCnode*, off_t expected); |
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| 29 | |
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| 30 | static int ocarrayith(OCstate*, OCcontent*, OCcontent*, size_t); |
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| 31 | static int ocsequenceith(OCstate*, OCcontent*, OCcontent*, size_t); |
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| 32 | static int ocfieldith(OCstate*, OCcontent*, OCcontent*, size_t); |
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| 33 | |
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| 34 | static size_t ocarraycount(OCstate*, struct OCcontent*); |
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| 35 | static size_t ocsequencecount(OCstate*, struct OCcontent*); |
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| 36 | static size_t ocfieldcount(OCstate*, struct OCcontent*); |
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| 37 | static size_t ocprimcount(OCstate*, struct OCcontent*); |
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| 38 | |
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| 39 | static OCcontent* occlearcontent(struct OCstate* state, OCcontent* content); |
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| 40 | |
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| 41 | |
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| 42 | #ifdef OCDEBUG |
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| 43 | static void |
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| 44 | report(size_t memsize, char* memory) |
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| 45 | { |
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| 46 | #ifdef OCIGNORE |
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| 47 | switch(memsize) { |
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| 48 | case 1: |
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| 49 | oc_log(LOGNOTE,"reading xdr: %lu bytes = |%2x|",(unsigned long)memsize,memory[0]); |
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| 50 | break; |
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| 51 | case 4: |
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| 52 | oc_log(LOGNOTE,"reading xdr: %lu bytes = |%4lu|",(unsigned long)memsize,*(unsigned int*)memory); |
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| 53 | break; |
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| 54 | case 8: |
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| 55 | oc_log(LOGNOTE,"reading xdr: %lu bytes = |%8lu|",(unsigned long)memsize,*(unsigned long long*)memory); |
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| 56 | break; |
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| 57 | default: |
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| 58 | oc_log(LOGNOTE,"reading xdr: %lu bytes",(unsigned long)memsize); |
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| 59 | break; |
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| 60 | } |
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| 61 | oc_log(LOGNOTE,"reading xdr: %lu bytes",(unsigned long)memsize); |
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| 62 | #endif |
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| 63 | } |
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| 64 | |
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| 65 | static char* |
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| 66 | modestring(OCmode mode) |
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| 67 | { |
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| 68 | switch(mode) { |
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| 69 | case OCFIELDMODE: return "FIELD"; |
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| 70 | case OCSEQUENCEMODE: return "SEQUENCE"; |
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| 71 | case OCARRAYMODE: return "ARRAY"; |
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| 72 | case OCPRIMITIVEMODE: return "PRIMITIVE"; |
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| 73 | case OCNULLMODE: return "NULL"; |
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| 74 | case OCEMPTYMODE: return "EMPTY"; |
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| 75 | } |
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| 76 | return "?"; |
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| 77 | } |
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| 78 | |
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| 79 | void |
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| 80 | octrace1(char* proc, OCstate* state, OCcontent* content, int start, int count) |
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| 81 | { |
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| 82 | unsigned long pos = xxdr_getpos(content->tree->data.xdrs); |
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| 83 | fprintf(stderr,"trace: %s mode=%s node=%s (%s)", |
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| 84 | proc,modestring(content->mode),content->node->fullname, |
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| 85 | octypetostring(content->node->octype)); |
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| 86 | if(content->packed) |
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| 87 | fprintf(stderr," packed=%d",content->packed); |
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| 88 | if(count >= 0) |
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| 89 | fprintf(stderr," start=%lu count=%lu", |
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| 90 | (unsigned long)start,(unsigned long)count); |
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| 91 | else |
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| 92 | fprintf(stderr," index=%lu",(unsigned long)start); |
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| 93 | fprintf(stderr," xdrs.pos=%lu",pos); |
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| 94 | fprintf(stderr,"\n"); |
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| 95 | if(content->cache.valid) { |
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| 96 | fprintf(stderr,"\tcache{index=%lu maxindex=%lu offset=%lu}\n", |
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| 97 | (unsigned long)content->cache.index, |
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| 98 | (unsigned long)content->cache.maxindex, |
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| 99 | (unsigned long)content->cache.offset); |
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| 100 | } |
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| 101 | fflush(stderr); |
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| 102 | } |
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| 103 | |
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| 104 | void |
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| 105 | octrace(char* proc, OCstate* state, OCcontent* content, int index) |
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| 106 | { |
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| 107 | octrace1(proc,state,content,index,-1); |
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| 108 | } |
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| 109 | |
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| 110 | |
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| 111 | #else |
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| 112 | #define octrace(proc,state,content,index) |
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| 113 | #define octrace1(proc,state,content,start,count) |
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| 114 | #define report(memsize,memory) |
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| 115 | #endif /*OCDEBUG*/ |
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| 116 | |
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| 117 | OCmode |
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| 118 | ocgetmode(OCcontent* content) |
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| 119 | { |
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| 120 | return (content == NULL ? OCNULLMODE : content->mode); |
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| 121 | } |
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| 122 | |
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| 123 | OCcontent* |
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| 124 | ocnewcontent(OCstate* state) |
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| 125 | { |
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| 126 | OCcontent* content; |
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| 127 | if(state == NULL) return NULL; |
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| 128 | content = state->contentlist; |
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| 129 | /* Search for an unused content node*/ |
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| 130 | while(content != NULL && content->mode != OCEMPTYMODE) { |
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| 131 | content = content->next; |
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| 132 | } |
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| 133 | if(content == NULL) { |
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| 134 | content = (OCcontent*)ocmalloc(sizeof(OCcontent)); |
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| 135 | MEMCHECK(content,(OCcontent*)NULL); |
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| 136 | content->magic = OCMAGIC; |
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| 137 | content->next = state->contentlist; |
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| 138 | state->contentlist = content; |
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| 139 | } |
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| 140 | return occlearcontent(state,content); |
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| 141 | } |
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| 142 | |
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| 143 | void |
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| 144 | ocfreecontent(OCstate* state, OCcontent* content) |
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| 145 | { |
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| 146 | if(content != NULL) {content->mode = OCEMPTYMODE;} |
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| 147 | } |
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| 148 | |
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| 149 | static OCcontent* |
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| 150 | occlearcontent(struct OCstate* state, OCcontent* content) |
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| 151 | { |
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| 152 | /* save fields that should not be cleared */ |
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| 153 | unsigned int magic = content->magic; |
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| 154 | OCcontent* next = content->next; |
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| 155 | memset((void*)content,sizeof(OCcontent),0); |
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| 156 | /* set/restore non-null fields */ |
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| 157 | content->magic = magic; |
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| 158 | content->next = next; |
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| 159 | content->state = state; |
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| 160 | content->mode = OCNULLMODE; |
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| 161 | return content; |
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| 162 | } |
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| 163 | |
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| 164 | static OCcontent* |
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| 165 | ocsetcontent(OCcontent* childcontent, OCcontent* parent, OCnode* node, int packed) |
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| 166 | { |
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| 167 | childcontent->state = parent->state; |
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| 168 | childcontent->cache.valid = 0; |
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| 169 | childcontent->node = node; |
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| 170 | childcontent->tree = node->root->tree; |
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| 171 | childcontent->mode = modetransition(node,parent->mode); |
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| 172 | childcontent->packed = packed; |
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| 173 | return childcontent; |
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| 174 | } |
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| 175 | |
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| 176 | #ifdef OCIGNORE |
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| 177 | static OCcontent* |
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| 178 | occlonecontent(OCstate* state, OCcontent* content) |
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| 179 | { |
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| 180 | OCcontent* clone = ocnewcontent(state); |
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| 181 | clone->mode = content->mode; |
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| 182 | clone->node = content->node; |
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| 183 | clone->cache = content->indexcache; |
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| 184 | return clone; |
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| 185 | } |
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| 186 | #endif |
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| 187 | |
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| 188 | OCerror |
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| 189 | ocdataith(OCstate* state, OCcontent* parent, size_t index, OCcontent* child) |
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| 190 | { |
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| 191 | OCerror ocerr = OC_NOERR; |
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| 192 | switch (parent->mode) { |
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| 193 | case OCARRAYMODE: |
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| 194 | ocerr = ocarrayith(state,parent,child,index); |
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| 195 | break; |
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| 196 | case OCSEQUENCEMODE: |
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| 197 | ocerr = ocsequenceith(state,parent,child,index); |
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| 198 | break; |
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| 199 | case OCFIELDMODE: |
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| 200 | ocerr = ocfieldith(state,parent,child,index); |
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| 201 | break; |
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| 202 | default: return OC_EINVAL; |
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| 203 | } |
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| 204 | if(ocerr == OC_EDATADDS) |
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| 205 | ocdataddsmsg(state,parent->tree); |
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| 206 | return ocerr; |
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| 207 | } |
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| 208 | |
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| 209 | OCerror |
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| 210 | ocdatacount(OCstate* state, OCcontent* current, size_t* sizep) |
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| 211 | { |
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| 212 | OCerror ocerr = OC_NOERR; |
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| 213 | size_t count = 0; |
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| 214 | switch(current->mode) { |
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| 215 | case OCARRAYMODE: |
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| 216 | count = ocarraycount(state,current); |
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| 217 | break; |
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| 218 | case OCSEQUENCEMODE: |
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| 219 | count = ocsequencecount(state,current); |
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| 220 | break; |
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| 221 | case OCFIELDMODE: |
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| 222 | count = ocfieldcount(state,current); |
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| 223 | break; |
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| 224 | case OCPRIMITIVEMODE: |
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| 225 | count = ocprimcount(state,current); |
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| 226 | break; |
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| 227 | default: |
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| 228 | return OC_EINVAL; |
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| 229 | } |
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| 230 | current->cache.maxindex = ocmax(count,current->cache.maxindex); |
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| 231 | if(sizep) *sizep = count; |
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| 232 | return ocerr; |
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| 233 | } |
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| 234 | |
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| 235 | OCerror |
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| 236 | ocrootdata(OCstate* state, OCnode* root, OCcontent* content) |
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| 237 | { |
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| 238 | OCtree* tree; |
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| 239 | if(state == NULL || root == NULL || content == NULL) |
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| 240 | return OCTHROW(OC_EINVAL); |
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| 241 | if(root->tree == NULL) return OCTHROW(OC_EINVAL); |
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| 242 | tree = root->tree; |
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| 243 | if(tree->dxdclass != OCDATADDS) return OCTHROW(OC_ENODATA); |
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| 244 | if(tree->nodes == NULL) return OCTHROW(OC_EINVAL); |
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| 245 | if(tree->data.xdrs == NULL) |
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| 246 | return OCTHROW(OC_EXDR); |
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| 247 | |
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| 248 | occlearcontent(state,content); |
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| 249 | content->mode = OCFIELDMODE; |
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| 250 | content->node = root; |
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| 251 | content->tree = tree; |
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| 252 | |
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| 253 | content->cache.index = 0; |
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| 254 | content->cache.maxindex = oclistlength(content->node->subnodes); |
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| 255 | content->cache.offset = 0; |
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| 256 | content->cache.valid = 1; |
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| 257 | |
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| 258 | return OCTHROW(OC_NOERR); |
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| 259 | } |
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| 260 | |
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| 261 | /* Remember: we are operating wrt the datadds count, not the dds count */ |
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| 262 | static OCerror |
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| 263 | ocarrayith(OCstate* state, OCcontent* content, OCcontent* elemcontent, size_t index) |
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| 264 | { |
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| 265 | unsigned int i; |
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| 266 | int stat = OC_NOERR; |
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| 267 | XXDR* xdrs; |
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| 268 | int packed, scalar; |
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| 269 | OCtype etype,octype; |
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| 270 | OCnode* node; |
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| 271 | int startindex = 0; |
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| 272 | |
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| 273 | octrace("ocarrayith", state, content, index); |
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| 274 | |
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| 275 | if(state == NULL || content == NULL) return OCTHROW(OC_EINVAL); |
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| 276 | if(content->mode != OCARRAYMODE) return OCTHROW(OC_EINVAL); |
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| 277 | |
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| 278 | etype = content->node->etype; |
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| 279 | octype = content->node->octype; |
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| 280 | node = content->node; |
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| 281 | scalar = (node->array.rank == 0 ? 1 : 0); |
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| 282 | packed = (!scalar && octype == OC_Primitive && |
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| 283 | (etype == OC_Byte || etype == OC_UByte || etype == OC_Char)); |
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| 284 | |
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| 285 | xdrs = content->tree->data.xdrs; |
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| 286 | if(xdrs == NULL) return OCTHROW(OC_EXDR); |
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| 287 | |
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| 288 | if(!content->cache.valid) { |
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| 289 | content->cache.index = 0; /* because we will have to walk to index'th data */ |
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| 290 | content->cache.maxindex = totaldimsize(node); |
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| 291 | content->cache.valid = 1; |
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| 292 | /* skip past the initial counts, if any */ |
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| 293 | if(!scalar) { |
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| 294 | if(!ocskipcounts(xdrs,node,node->skip.count)) return OCTHROW(OC_EDATADDS); |
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| 295 | } |
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| 296 | /* checkpoint xdr position */ |
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| 297 | content->cache.offset = xxdr_getpos(xdrs); |
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| 298 | } |
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| 299 | |
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| 300 | /* move to the checkpoint position */ |
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| 301 | startindex = content->cache.index; |
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| 302 | if(!xxdr_setpos(xdrs,content->cache.offset)) return xdrerror(); |
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| 303 | |
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| 304 | /* skip to the index'th item */ |
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| 305 | if(packed) { |
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| 306 | content->cache.index = 0; /* keep at beginning */ |
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| 307 | } else { |
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| 308 | for(i=startindex;i<index;i++) { |
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| 309 | stat = ocskipinstance(node,xdrs,SKIPINSTANCE,NULL); |
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| 310 | if(stat != OC_NOERR) return OCTHROW(stat); |
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| 311 | } |
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| 312 | content->cache.index = index; /* now we are at the index'th item */ |
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| 313 | } |
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| 314 | |
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| 315 | /* update cache */ |
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| 316 | content->cache.index = index; |
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| 317 | content->cache.offset = xxdr_getpos(xdrs); |
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| 318 | |
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| 319 | /* set up the content for the current item in the array */ |
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| 320 | ocsetcontent(elemcontent,content,node,packed); /*keep same node */ |
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| 321 | if (index == content->cache.maxindex) { |
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| 322 | /* mark eod */ |
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| 323 | elemcontent->mode = OCNULLMODE; |
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| 324 | } |
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| 325 | |
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| 326 | return OCTHROW(stat); |
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| 327 | } |
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| 328 | |
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| 329 | static int |
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| 330 | ocsequenceith(OCstate* state, OCcontent* content, OCcontent* structcontent, size_t index) |
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| 331 | { |
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| 332 | unsigned int i; |
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| 333 | int stat = OC_NOERR; |
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| 334 | XXDR* xdrs; |
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| 335 | OCtype octype,etype; |
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| 336 | int packed,scalar; |
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| 337 | OCnode* node = content->node; |
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| 338 | int startindex, tag; |
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| 339 | |
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| 340 | octrace("ocsequenceith", state, content, index); |
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| 341 | |
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| 342 | if(state == NULL || content == NULL) goto einval; |
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| 343 | if(content->mode != OCSEQUENCEMODE) goto einval; |
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| 344 | if(node->octype != OC_Sequence) goto einval; |
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| 345 | |
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| 346 | octype = node->octype; |
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| 347 | etype = node->etype; |
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| 348 | scalar = (node->array.rank == 0 ? 1 : 0); |
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| 349 | packed = (!scalar && octype == OC_Primitive && |
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| 350 | (etype == OC_Byte || etype == OC_UByte || etype == OC_Char)); |
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| 351 | |
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| 352 | xdrs = content->tree->data.xdrs; |
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| 353 | if(xdrs == NULL) goto exdr; |
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| 354 | |
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| 355 | if(!content->cache.valid) { |
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| 356 | content->cache.valid = 1; |
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| 357 | content->cache.index = 0; |
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| 358 | content->cache.maxindex = 0; |
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| 359 | content->cache.offset = xxdr_getpos(xdrs); |
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| 360 | } |
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| 361 | |
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| 362 | /* move to checkpoint position*/ |
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| 363 | startindex = content->cache.index; |
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| 364 | if(!xxdr_setpos(xdrs,content->cache.offset)) goto exdr; |
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| 365 | |
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| 366 | /* Walk past the first (index-1) records */ |
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| 367 | for(tag=StartOfSequence,i=startindex;i<index;i++) { |
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| 368 | /* skip instance, including tag, but leave xdr at next tag */ |
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| 369 | stat = ocskipinstance(node,xdrs,SKIPINSTANCE,&tag); |
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| 370 | if(stat != OC_NOERR) goto done; |
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| 371 | if(tag == EndOfSequence) |
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| 372 | break; |
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| 373 | if(tag != StartOfSequence) { |
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| 374 | oc_log(LOGERR,"missing/invalid begin/end record marker\n"); |
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| 375 | goto einvalcoords; |
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| 376 | } |
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| 377 | } |
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| 378 | if(stat != OC_NOERR) goto done; |
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| 379 | |
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| 380 | /* update cache; should be pointing to index'th record tag */ |
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| 381 | content->cache.index = index; |
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| 382 | content->cache.maxindex = ocmax(index,content->cache.index); |
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| 383 | |
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| 384 | /* this is a bit (too) tricky */ |
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| 385 | /* move to point to fields */ |
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| 386 | tag = ocgetsequencetag(xdrs); |
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| 387 | if(tag == EndOfSequence) { |
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| 388 | /* point past end of sequence */ |
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| 389 | content->cache.offset = xxdr_getpos(xdrs); |
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| 390 | } else {/*tag == StartOfSequence*/ |
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| 391 | /* point to (next) start of sequence */ |
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| 392 | content->cache.offset = xxdr_getpos(xdrs) - XDRUNIT; |
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| 393 | } |
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| 394 | /* at this point, xdrs should point unconditionally |
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| 395 | past the index'th tag */ |
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| 396 | |
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| 397 | /* Set state of new content: keep same node */ |
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| 398 | ocsetcontent(structcontent,content,node,packed); |
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| 399 | if(tag == EndOfSequence) { |
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| 400 | /* mark eod */ |
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| 401 | structcontent->mode = OCNULLMODE; |
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| 402 | } |
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| 403 | done: |
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| 404 | return OCTHROW(stat); |
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| 405 | einval: |
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| 406 | stat = OC_EINVAL; |
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| 407 | goto done; |
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| 408 | exdr: |
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| 409 | stat = OC_EXDR; |
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| 410 | goto done; |
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| 411 | einvalcoords: |
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| 412 | stat = OC_EINVALCOORDS; |
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| 413 | goto done; |
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| 414 | } |
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| 415 | |
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| 416 | /* |
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| 417 | The ocfieldcontent procedure has to deal with the fact |
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| 418 | that the dap constraints may have removed some fields |
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| 419 | from the datadds and hence some fields may have no |
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| 420 | representation in the xdr data (or compiled data). |
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| 421 | Assume that xdr points to start of 0th field. |
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| 422 | */ |
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| 423 | static int |
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| 424 | ocfieldith(OCstate* state, OCcontent* content, OCcontent* fieldcontent, size_t index) |
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| 425 | { |
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| 426 | unsigned int i; |
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| 427 | int stat = OC_NOERR; |
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| 428 | XXDR* xdrs; |
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| 429 | OCtype octype,etype; |
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| 430 | int packed; |
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| 431 | int isscalar; |
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| 432 | OCnode* node; |
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| 433 | int startindex; |
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| 434 | |
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| 435 | octrace("ocfieldith", state, content, index); |
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| 436 | |
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| 437 | if(state == NULL || content == NULL) return OCTHROW(OC_EINVAL); |
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| 438 | if(content->mode != OCFIELDMODE) return OCTHROW(OC_EINVAL); |
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| 439 | |
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| 440 | node = content->node; |
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| 441 | octype = node->octype; |
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| 442 | etype = node->etype; |
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| 443 | isscalar = (node->array.rank == 0 ? 1 : 0); |
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| 444 | packed = (!isscalar && octype == OC_Primitive |
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| 445 | && (etype == OC_Byte || etype == OC_UByte || etype == OC_Char)); |
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| 446 | |
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| 447 | xdrs = content->tree->data.xdrs; |
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| 448 | if(xdrs == NULL) return OCTHROW(OC_EXDR); |
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| 449 | |
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| 450 | if(!content->cache.valid) { |
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| 451 | content->cache.index = 0; |
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| 452 | content->cache.maxindex = oclistlength(node->subnodes); |
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| 453 | content->cache.valid = 1; |
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| 454 | /* checkpoint xdr position */ |
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| 455 | content->cache.offset = xxdr_getpos(xdrs); |
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| 456 | } |
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| 457 | |
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| 458 | /* move to the checkpoint position */ |
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| 459 | startindex = content->cache.index; |
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| 460 | if(!xxdr_setpos(xdrs,content->cache.offset)) return xdrerror(); |
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| 461 | |
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| 462 | switch (octype) { |
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| 463 | case OC_Sequence: /* assume xdrs points past sequence tag */ |
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| 464 | case OC_Grid: /* Note that the Grid array is field 0 and the maps are 1..nsubnodes*/ |
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| 465 | case OC_Dataset: |
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| 466 | case OC_Structure: |
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| 467 | /* walk to (i-1)'th field */ |
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| 468 | for(i=startindex;i<index;i++) { /* walk field by field */ |
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| 469 | OCnode* ithfield = (OCnode*)oclistget(node->subnodes,i); |
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| 470 | stat = ocskipinstance(ithfield,xdrs,SKIPWHOLE,NULL); |
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| 471 | if(stat != OC_NOERR) return OCTHROW(stat); |
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| 472 | } |
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| 473 | break; |
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| 474 | |
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| 475 | default: return OCTHROW(OC_EINVAL); |
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| 476 | } |
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| 477 | |
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| 478 | /* update cache */ |
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| 479 | content->cache.index = index; |
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| 480 | content->cache.offset = xxdr_getpos(xdrs); |
---|
| 481 | /* Set state of new content: node changes to field node */ |
---|
| 482 | ocsetcontent(fieldcontent,content, |
---|
| 483 | (OCnode*)oclistget(node->subnodes,index), |
---|
| 484 | packed); |
---|
| 485 | if(index >= content->cache.maxindex) { |
---|
| 486 | /* mark eod */ |
---|
| 487 | fieldcontent->mode = OCNULLMODE; |
---|
| 488 | } |
---|
| 489 | |
---|
| 490 | return OCTHROW(stat); |
---|
| 491 | } |
---|
| 492 | |
---|
| 493 | /* |
---|
| 494 | In order to actually extract data, |
---|
| 495 | one must move to the specific primitive typed |
---|
| 496 | field containing the data of interest by using |
---|
| 497 | ocfieldcontent(). |
---|
| 498 | Then, oc_getcontent() is invoked to extract |
---|
| 499 | some subsequence of items from the field. |
---|
| 500 | Note that oc_getcontent() will also work for scalars, |
---|
| 501 | but the start must be zero and the count must be one. |
---|
| 502 | */ |
---|
| 503 | |
---|
| 504 | int |
---|
| 505 | ocgetcontent(OCstate* state, OCcontent* content, void* memory, size_t memsize, |
---|
| 506 | size_t start, size_t count) |
---|
| 507 | { |
---|
| 508 | int stat = OC_NOERR; |
---|
| 509 | XXDR* xdrs; |
---|
| 510 | OCtype etype, octype; |
---|
| 511 | int isscalar, packed; |
---|
| 512 | size_t elemsize, totalsize; |
---|
| 513 | OCnode* node = content->node; |
---|
| 514 | |
---|
| 515 | octrace1("ocgetcontent", state, content, start, count); |
---|
| 516 | |
---|
| 517 | if(state == NULL || content == NULL || memory == NULL) |
---|
| 518 | {OCTHROWCHK(stat=OC_EINVAL); goto done;} |
---|
| 519 | if(content->mode != OCPRIMITIVEMODE || node->octype != OC_Primitive) |
---|
| 520 | {OCTHROWCHK(stat=OC_EINVAL); goto done;} |
---|
| 521 | |
---|
| 522 | octype = node->octype; |
---|
| 523 | etype = node->etype; |
---|
| 524 | |
---|
| 525 | isscalar = (node->array.rank == 0); |
---|
| 526 | packed = (!isscalar && octype == OC_Primitive |
---|
| 527 | && (etype == OC_Byte || etype == OC_UByte || etype == OC_Char)); |
---|
| 528 | |
---|
| 529 | if(isscalar && (start != 0 || count != 1)) |
---|
| 530 | {OCTHROWCHK(stat=OC_EINVALCOORDS); goto done;} |
---|
| 531 | |
---|
| 532 | /* validate memory space*/ |
---|
| 533 | elemsize = octypesize(etype); |
---|
| 534 | totalsize = elemsize*count; |
---|
| 535 | if(memsize < totalsize) return OCTHROW(OC_EINVAL); |
---|
| 536 | |
---|
| 537 | xdrs = content->tree->data.xdrs; |
---|
| 538 | if(xdrs == NULL) return OCTHROW(OC_EXDR); |
---|
| 539 | |
---|
| 540 | /* Need to setup the cache */ |
---|
| 541 | if(!content->cache.valid) { |
---|
| 542 | content->cache.valid = 1; |
---|
| 543 | content->cache.index = 0; |
---|
| 544 | content->cache.maxindex = totaldimsize(content->node); |
---|
| 545 | if(!ocskipcounts(xdrs,content->node,content->cache.maxindex)) |
---|
| 546 | return OCTHROW(OC_EXDR); |
---|
| 547 | content->cache.offset = xxdr_getpos(xdrs); |
---|
| 548 | } |
---|
| 549 | |
---|
| 550 | if(content->cache.valid && content->cache.maxindex < (start+count)) |
---|
| 551 | return OCTHROW(OC_ENODATA); |
---|
| 552 | |
---|
| 553 | /* utilize the cache */ |
---|
| 554 | if(!xxdr_setpos(xdrs,content->cache.offset)) return OCTHROW(OC_EXDR); |
---|
| 555 | |
---|
| 556 | /* Extract the data */ |
---|
| 557 | stat = ocxdrread(content,xdrs,(char*)memory,memsize,start,count); |
---|
| 558 | |
---|
| 559 | #ifdef OCDEBUG |
---|
| 560 | report(memsize,memory+start); |
---|
| 561 | #endif |
---|
| 562 | |
---|
| 563 | /* Update the cache */ |
---|
| 564 | if(!packed) { |
---|
| 565 | content->cache.index = (start+count); |
---|
| 566 | content->cache.offset = xxdr_getpos(xdrs); |
---|
| 567 | } |
---|
| 568 | |
---|
| 569 | done: |
---|
| 570 | return OCTHROW(stat); |
---|
| 571 | } |
---|
| 572 | |
---|
| 573 | static size_t |
---|
| 574 | ocfieldcount(OCstate* state, OCcontent* content) |
---|
| 575 | { |
---|
| 576 | OCnode* node = content->node; |
---|
| 577 | size_t count; |
---|
| 578 | OCASSERT((node != NULL)); |
---|
| 579 | count = oclistlength(node->subnodes); |
---|
| 580 | return count; |
---|
| 581 | } |
---|
| 582 | |
---|
| 583 | static size_t |
---|
| 584 | ocarraycount(OCstate* state, OCcontent* content) |
---|
| 585 | { |
---|
| 586 | unsigned int count; |
---|
| 587 | OCnode* node = content->node; |
---|
| 588 | |
---|
| 589 | OCASSERT((node != NULL)); |
---|
| 590 | OCASSERT((content->mode == OCARRAYMODE)); |
---|
| 591 | |
---|
| 592 | count = totaldimsize(node); |
---|
| 593 | |
---|
| 594 | #ifdef VERIFY |
---|
| 595 | if(node->array.rank > 0) { |
---|
| 596 | off_t checkpoint; |
---|
| 597 | XXDR* xdrs; |
---|
| 598 | unsigned int xdrcount; |
---|
| 599 | /* verify against xdr */ |
---|
| 600 | xdrs = content->tree->data.xdrs; |
---|
| 601 | OCASSERT((xdrs != NULL)); |
---|
| 602 | /* checkpoint current location */ |
---|
| 603 | checkpoint = xxdr_getpos(xdrs); |
---|
| 604 | /* extract the count*/ |
---|
| 605 | if(!xxdr_uint(xdrs,&xdrcount)) return 0; |
---|
| 606 | if(xdrcount != count) return 0; |
---|
| 607 | /* return to checkpoint position*/ |
---|
| 608 | if(!xxdr_setpos(xdrs,checkpoint)) return 0; |
---|
| 609 | } |
---|
| 610 | #endif /*VERIFY*/ |
---|
| 611 | return (size_t)count; |
---|
| 612 | } |
---|
| 613 | |
---|
| 614 | /* Counting records actually requires walking the xdr packet |
---|
| 615 | so it is not necessarily cheap*/ |
---|
| 616 | static size_t |
---|
| 617 | ocsequencecount(OCstate* state, OCcontent* content) |
---|
| 618 | { |
---|
| 619 | size_t count; |
---|
| 620 | OCnode* node = content->node; |
---|
| 621 | XXDR* xdrs; |
---|
| 622 | off_t checkpoint; |
---|
| 623 | |
---|
| 624 | OCASSERT((node != NULL)); |
---|
| 625 | OCASSERT((node->octype == OC_Sequence)); |
---|
| 626 | OCASSERT((content->mode == OCSEQUENCEMODE)); |
---|
| 627 | |
---|
| 628 | xdrs = content->tree->data.xdrs; |
---|
| 629 | OCASSERT((xdrs != NULL)); |
---|
| 630 | |
---|
| 631 | /* checkpoint location */ |
---|
| 632 | checkpoint = xxdr_getpos(xdrs); |
---|
| 633 | |
---|
| 634 | for(count=0;;count++) { |
---|
| 635 | int tag; |
---|
| 636 | OCerror stat = ocskipinstance(node,xdrs,SKIPINSTANCE,&tag); |
---|
| 637 | if(stat != OC_NOERR) {count = 0; break;} |
---|
| 638 | if(tag == EndOfSequence) { |
---|
| 639 | break; /* done with the count*/ |
---|
| 640 | } else if(tag != StartOfSequence) { |
---|
| 641 | oc_log(LOGERR,"missing/invalid begin/end record marker\n"); |
---|
| 642 | return 0; |
---|
| 643 | } |
---|
| 644 | } |
---|
| 645 | |
---|
| 646 | /* move back to checkpoint position*/ |
---|
| 647 | if(!xxdr_setpos(xdrs,checkpoint)) return 0; |
---|
| 648 | |
---|
| 649 | return count; |
---|
| 650 | } |
---|
| 651 | |
---|
| 652 | static size_t |
---|
| 653 | ocprimcount(OCstate* state, OCcontent* content) |
---|
| 654 | { |
---|
| 655 | unsigned int count; |
---|
| 656 | OCnode* node = content->node; |
---|
| 657 | |
---|
| 658 | OCASSERT((node != NULL)); |
---|
| 659 | OCASSERT((content->mode == OCPRIMITIVEMODE)); |
---|
| 660 | |
---|
| 661 | count = totaldimsize(node); |
---|
| 662 | |
---|
| 663 | #ifdef VERIFY |
---|
| 664 | if(node->array.rank > 0) { |
---|
| 665 | off_t checkpoint; |
---|
| 666 | XXDR* xdrs; |
---|
| 667 | unsigned int xdrcount; |
---|
| 668 | /* verify against xdr */ |
---|
| 669 | xdrs = content->tree->data.xdrs; |
---|
| 670 | OCASSERT((xdrs != NULL)); |
---|
| 671 | /* checkpoint current location */ |
---|
| 672 | checkpoint = xxdr_getpos(xdrs); |
---|
| 673 | /* extract the count*/ |
---|
| 674 | if(!xxdr_uint(xdrs,&xdrcount)) return 0; |
---|
| 675 | if(xdrcount != count) return 0; |
---|
| 676 | /* return to checkpoint position*/ |
---|
| 677 | if(!xxdr_setpos(xdrs,checkpoint)) return 0; |
---|
| 678 | } |
---|
| 679 | #endif /*VERIFY*/ |
---|
| 680 | return (size_t)count; |
---|
| 681 | } |
---|
| 682 | |
---|
| 683 | static OCmode |
---|
| 684 | modetransition(OCnode* node, OCmode srcmode) |
---|
| 685 | { |
---|
| 686 | OCmode newmode = OCNULLMODE; |
---|
| 687 | switch (srcmode) { |
---|
| 688 | case OCARRAYMODE: |
---|
| 689 | switch (node->octype) { |
---|
| 690 | case OC_Sequence: |
---|
| 691 | newmode = OCSEQUENCEMODE; |
---|
| 692 | break; |
---|
| 693 | case OC_Grid: |
---|
| 694 | case OC_Structure: |
---|
| 695 | newmode = OCFIELDMODE; |
---|
| 696 | break; |
---|
| 697 | default: |
---|
| 698 | break; |
---|
| 699 | } |
---|
| 700 | break; |
---|
| 701 | |
---|
| 702 | case OCSEQUENCEMODE: |
---|
| 703 | switch (node->octype) { |
---|
| 704 | default: |
---|
| 705 | newmode = OCFIELDMODE; |
---|
| 706 | break; |
---|
| 707 | } |
---|
| 708 | break; |
---|
| 709 | |
---|
| 710 | case OCFIELDMODE: |
---|
| 711 | switch (node->octype) { |
---|
| 712 | case OC_Sequence: |
---|
| 713 | case OC_Grid: |
---|
| 714 | case OC_Structure: |
---|
| 715 | newmode = OCARRAYMODE; |
---|
| 716 | break; |
---|
| 717 | case OC_Primitive: |
---|
| 718 | newmode = OCPRIMITIVEMODE; |
---|
| 719 | break; |
---|
| 720 | default: |
---|
| 721 | break; |
---|
| 722 | } |
---|
| 723 | break; |
---|
| 724 | |
---|
| 725 | case OCPRIMITIVEMODE: |
---|
| 726 | case OCNULLMODE: |
---|
| 727 | case OCEMPTYMODE: |
---|
| 728 | default: |
---|
| 729 | newmode = OCNULLMODE; |
---|
| 730 | break; |
---|
| 731 | } |
---|
| 732 | if(newmode == OCNULLMODE) |
---|
| 733 | OCPANIC1("No defined mode transition: %d",(int)srcmode); |
---|
| 734 | return newmode; |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | /* get the presumed current sequence tag */ |
---|
| 738 | static int |
---|
| 739 | ocgetsequencetag(XXDR* xdrs) |
---|
| 740 | { |
---|
| 741 | char tag[XDRUNIT]; |
---|
| 742 | if(!xxdr_getbytes(xdrs,tag,sizeof(tag))) return 0; |
---|
| 743 | return tag[0]; |
---|
| 744 | } |
---|
| 745 | |
---|
| 746 | static int |
---|
| 747 | ocskipcounts(XXDR* xdrs, OCnode* node, off_t expected) |
---|
| 748 | { |
---|
| 749 | if(node->array.rank == 0) return 1; /* simple scalar */ |
---|
| 750 | #ifdef VERIFY |
---|
| 751 | unsigned int xdrcount0,xdrcount1; |
---|
| 752 | /* Collect the dimension count from the xdr data packet*/ |
---|
| 753 | if(!xxdr_uint(xdrs,&xdrcount0)) OCGOTO(shortxdr); |
---|
| 754 | if(expected >= 0 && xdrcount0 != expected) return 0; |
---|
| 755 | /* pull out redundant second count*/ |
---|
| 756 | /* (note that String/URL do not have redundant count)*/ |
---|
| 757 | if(node->octype == OC_Primitive |
---|
| 758 | && node->etype != OC_String && node->etype != OC_URL) { |
---|
| 759 | if(!xxdr_uint(xdrs,&xdrcount1)) return 0; |
---|
| 760 | if(xdrcount0 != xdrcount1) return 0; |
---|
| 761 | } |
---|
| 762 | #else |
---|
| 763 | /* skip the counts */ |
---|
| 764 | expected = expected; /*shut up compiler*/ |
---|
| 765 | if(node->octype == OC_Primitive |
---|
| 766 | && node->etype != OC_String && node->etype != OC_URL) { |
---|
| 767 | if(!xxdr_skip(xdrs,2*XDRUNIT)) return 0; |
---|
| 768 | } else { |
---|
| 769 | if(!xxdr_skip(xdrs,XDRUNIT)) return 0; |
---|
| 770 | } |
---|
| 771 | #endif |
---|
| 772 | return 1; |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | /**************************************************/ |
---|
| 776 | /* Moved ocdata.c here */ |
---|
| 777 | /**************************************************/ |
---|
| 778 | |
---|
| 779 | const char StartOfSequence = '\x5A'; |
---|
| 780 | const char EndOfSequence = '\xA5'; |
---|
| 781 | |
---|
| 782 | static int ocerrorstring(XXDR* xdrs); |
---|
| 783 | |
---|
| 784 | #define LOCALMEMMAX 1024 |
---|
| 785 | |
---|
| 786 | /* |
---|
| 787 | Skip arbitrary object based on its octype |
---|
| 788 | and a state |
---|
| 789 | |
---|
| 790 | Cases: |
---|
| 791 | |
---|
| 792 | octype Skip State actions |
---|
| 793 | ------------------------------------------- |
---|
| 794 | Structure |
---|
| 795 | |Grid |
---|
| 796 | |DataSet SKIPINSTANCE Skip single instance |
---|
| 797 | |SKIPFIELDS |
---|
| 798 | SKIPWHOLE Skip array of instances |
---|
| 799 | including leading counts |
---|
| 800 | |
---|
| 801 | Sequence SKIPFIELDS Skip single record |
---|
| 802 | (assume leading tag already skipped) |
---|
| 803 | SKIPINSTANCE Skip single record |
---|
| 804 | (including leading tag) |
---|
| 805 | |
---|
| 806 | SKIPWHOLE Skip all records |
---|
| 807 | including leading tags |
---|
| 808 | and trailing end marker |
---|
| 809 | |
---|
| 810 | Primitive <any> Skip whole primitive array |
---|
| 811 | including leading counts |
---|
| 812 | |
---|
| 813 | Notes: |
---|
| 814 | 1. unlisted combinations are not legal/possible. |
---|
| 815 | 2. assume that xxdr_getpos is properly positioned. |
---|
| 816 | 3. If octype is OC_Sequence, tagp will be set with the |
---|
| 817 | last tag encountered. |
---|
| 818 | */ |
---|
| 819 | |
---|
| 820 | OCerror |
---|
| 821 | ocskipinstance(OCnode* node, XXDR* xdrs, int state, int* tagp) |
---|
| 822 | { |
---|
| 823 | int i,tag; |
---|
| 824 | int stat = OC_NOERR; |
---|
| 825 | |
---|
| 826 | /* Support switch on combination of octype X state to simply code */ |
---|
| 827 | #define CASE(octype,state) ((octype)<<3 | state) |
---|
| 828 | |
---|
| 829 | switch (CASE(node->octype,state)) { |
---|
| 830 | |
---|
| 831 | case CASE(OC_Dataset,SKIPINSTANCE): |
---|
| 832 | case CASE(OC_Grid,SKIPINSTANCE): |
---|
| 833 | case CASE(OC_Structure,SKIPINSTANCE): |
---|
| 834 | |
---|
| 835 | case CASE(OC_Dataset,SKIPFIELDS): |
---|
| 836 | case CASE(OC_Grid,SKIPFIELDS): |
---|
| 837 | case CASE(OC_Structure,SKIPFIELDS): |
---|
| 838 | case CASE(OC_Sequence,SKIPFIELDS): /* NOTE this special case */ |
---|
| 839 | if(node->skip.instancesize != OCINDETERMINATE) { |
---|
| 840 | if(!xxdr_skip(xdrs,node->skip.instancesize)) OCGOTO(shortxdr); |
---|
| 841 | } else {/* skip field by field */ |
---|
| 842 | for(i=0;i<oclistlength(node->subnodes);i++) { |
---|
| 843 | OCnode* field = (OCnode*)oclistget(node->subnodes,i); |
---|
| 844 | stat = ocskipinstance(field, xdrs, SKIPWHOLE,NULL); |
---|
| 845 | if(stat != OC_NOERR) {OCTHROWCHK(stat); goto done;} |
---|
| 846 | } |
---|
| 847 | } |
---|
| 848 | break; |
---|
| 849 | |
---|
| 850 | case CASE(OC_Dataset,SKIPWHOLE): |
---|
| 851 | case CASE(OC_Grid,SKIPWHOLE): |
---|
| 852 | case CASE(OC_Structure,SKIPWHOLE): |
---|
| 853 | OCASSERT(node->skip.count != OCINDETERMINATE); |
---|
| 854 | if(node->skip.totalsize != OCINDETERMINATE) { |
---|
| 855 | if(!xxdr_skip(xdrs,node->skip.totalsize)) goto badxdr; |
---|
| 856 | } else {/* skip each instance */ |
---|
| 857 | if(node->array.rank > 0) { |
---|
| 858 | if(!ocskipcounts(xdrs,node,node->skip.count)) goto badxdr; |
---|
| 859 | for(i=0;i<node->skip.count;i++) { |
---|
| 860 | stat = ocskipinstance(node, xdrs, SKIPFIELDS,NULL); |
---|
| 861 | if(stat != OC_NOERR) {OCTHROWCHK(stat); goto done;} |
---|
| 862 | } |
---|
| 863 | } else { /* scalar */ |
---|
| 864 | stat = ocskipinstance(node, xdrs, SKIPINSTANCE,NULL); |
---|
| 865 | if(stat != OC_NOERR) {OCTHROWCHK(stat); goto done;} |
---|
| 866 | } |
---|
| 867 | } |
---|
| 868 | break; |
---|
| 869 | |
---|
| 870 | case CASE(OC_Sequence,SKIPINSTANCE): /* Skip record including tag */ |
---|
| 871 | tag = ocgetsequencetag(xdrs); /* always read the tag */ |
---|
| 872 | if(tagp) *tagp = tag; |
---|
| 873 | if(tag == StartOfSequence) { /* skip record fields */ |
---|
| 874 | stat = ocskipinstance(node, xdrs, SKIPFIELDS,NULL); |
---|
| 875 | if(stat != OC_NOERR) {OCTHROWCHK(stat); break;} |
---|
| 876 | } /* let caller handle */ |
---|
| 877 | break; |
---|
| 878 | |
---|
| 879 | case CASE(OC_Sequence,SKIPWHOLE): /* Skip multiple records including tags */ |
---|
| 880 | for(i=0;;i++) { |
---|
| 881 | stat = ocskipinstance(node, xdrs, SKIPINSTANCE, &tag); |
---|
| 882 | if(stat != OC_NOERR) {OCTHROWCHK(stat); break;} |
---|
| 883 | if(tag == EndOfSequence) break; /* done */ |
---|
| 884 | if(tag != StartOfSequence) goto badxdr; /* malformed */ |
---|
| 885 | } |
---|
| 886 | break; |
---|
| 887 | |
---|
| 888 | case CASE(OC_Primitive,SKIPWHOLE): |
---|
| 889 | case CASE(OC_Primitive,SKIPINSTANCE): |
---|
| 890 | case CASE(OC_Primitive,SKIPFIELDS): |
---|
| 891 | OCASSERT(node->skip.count != OCINDETERMINATE); |
---|
| 892 | if(node->skip.totalsize != OCINDETERMINATE) { |
---|
| 893 | /* skip directly past it */ |
---|
| 894 | if(!xxdr_skip(xdrs,node->skip.totalsize)) goto badxdr; |
---|
| 895 | } else {/* Walk instance by instance */ |
---|
| 896 | if(state == SKIPWHOLE) { |
---|
| 897 | /* read the counts */ |
---|
| 898 | if(!ocskipcounts(xdrs,node,node->skip.count)) |
---|
| 899 | goto badxdr; |
---|
| 900 | } |
---|
| 901 | OCASSERT(node->etype == OC_String || node->etype == OC_URL); |
---|
| 902 | /* get the count */ |
---|
| 903 | for(i=0;i<node->skip.count;i++) { |
---|
| 904 | /* read and skip the string */ |
---|
| 905 | unsigned int len; |
---|
| 906 | /* read string size */ |
---|
| 907 | if(!xxdr_uint(xdrs,&len)) OCGOTO(shortxdr); |
---|
| 908 | /* round up to next XDRUNIT and skip string contents */ |
---|
| 909 | len = RNDUP(len); |
---|
| 910 | if(!xxdr_skip(xdrs,(size_t)len)) OCGOTO(shortxdr); |
---|
| 911 | } |
---|
| 912 | } |
---|
| 913 | break; |
---|
| 914 | |
---|
| 915 | default: |
---|
| 916 | OCPANIC2("ocskipinstance: encountered unexpected node type or state: %d,%d", |
---|
| 917 | node->octype,state); |
---|
| 918 | break; |
---|
| 919 | } |
---|
| 920 | done: |
---|
| 921 | return OCTHROW(stat); |
---|
| 922 | shortxdr: |
---|
| 923 | oc_log(LOGERR,"short xdr packet"); |
---|
| 924 | stat = OC_EXDR; |
---|
| 925 | goto done; |
---|
| 926 | badxdr: |
---|
| 927 | oc_log(LOGERR,"malformed xdr packet"); |
---|
| 928 | stat = OC_EXDR; |
---|
| 929 | goto done; |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | /* |
---|
| 933 | Extract data from the xdr packet into a chunk of memory. |
---|
| 934 | Normally, it is assumed that we are (at least virtually) |
---|
| 935 | "at" a single instance in the xdr packet; which we read. |
---|
| 936 | Virtually because for packed data, we need to point to |
---|
| 937 | the beginning of the packed data and use the index to indicate |
---|
| 938 | which packed element to get. Assume that in any case, |
---|
| 939 | any leading counts have been passed. |
---|
| 940 | */ |
---|
| 941 | OCerror |
---|
| 942 | ocxdrread(OCcontent* content, XXDR* xdrs, char* memory, size_t memsize, |
---|
| 943 | ocindex_t start, ocindex_t count) |
---|
| 944 | { |
---|
| 945 | int stat = OC_NOERR; |
---|
| 946 | unsigned int i; |
---|
| 947 | size_t elemsize; |
---|
| 948 | size_t readsize; |
---|
| 949 | size_t skipsize; |
---|
| 950 | char localmem[LOCALMEMMAX]; |
---|
| 951 | char* srcmem; |
---|
| 952 | unsigned int* p; |
---|
| 953 | int packed; |
---|
| 954 | int scalar; |
---|
| 955 | OCtype octype,etype; |
---|
| 956 | ocindex_t localstart = start; /* will change if node is cacheing */ |
---|
| 957 | OCnode* node; |
---|
| 958 | |
---|
| 959 | node = content->node; |
---|
| 960 | octype = node->octype; |
---|
| 961 | etype = node->etype; |
---|
| 962 | |
---|
| 963 | elemsize = octypesize(etype); |
---|
| 964 | |
---|
| 965 | scalar = (node->array.rank == 0 ? 1 : 0); |
---|
| 966 | |
---|
| 967 | /* check if the data is packed*/ |
---|
| 968 | packed = (octype == OC_Primitive && !scalar |
---|
| 969 | && (etype == OC_Byte || etype == OC_UByte || etype == OC_Char)); |
---|
| 970 | |
---|
| 971 | /* validate memory space*/ |
---|
| 972 | if(memsize < elemsize*count) return OCTHROW(OC_EINVAL); |
---|
| 973 | |
---|
| 974 | #ifdef OCIGNORE |
---|
| 975 | if(!scalar && (!node->cache.cacheable || !node->cache.valid)) { |
---|
| 976 | unsigned int xdrcount0,xdrcount1; |
---|
| 977 | /* assume xdr position is correct */ |
---|
| 978 | /* Read leading double count if ! scalar*/ |
---|
| 979 | if(!xxdr_uint(xdrs,&xdrcount0)) OCGOTO(shortxdr); |
---|
| 980 | if(!xxdr_uint(xdrs,&xdrcount1)) OCGOTO(shortxdr); |
---|
| 981 | if(xdrcount0 != xdrcount1) return OCTHROW(OC_EXDR); |
---|
| 982 | if(xdrcount0 < start+count) OCGOTO(shortxdr); |
---|
| 983 | } |
---|
| 984 | #endif |
---|
| 985 | |
---|
| 986 | /* Handle packed data specially*/ |
---|
| 987 | if(packed) { |
---|
| 988 | readsize = count*1; /* |OC_(Char,Byte,UByte)| == 1 */ |
---|
| 989 | skipsize = start*1; /* |OC_(Char,Byte,UByte)| == 1 */ |
---|
| 990 | /* skip to start of what we want to read */ |
---|
| 991 | if(!xxdr_skip(xdrs,skipsize)) OCGOTO(shortxdr); |
---|
| 992 | /* read data, keeping xdrs on XDRUNIT boundary */ |
---|
| 993 | if(!xxdr_opaque(xdrs,memory,readsize)) |
---|
| 994 | OCGOTO(shortxdr); |
---|
| 995 | return OCTHROW(OC_NOERR); |
---|
| 996 | } |
---|
| 997 | |
---|
| 998 | /* Not packed */ |
---|
| 999 | |
---|
| 1000 | #ifdef OCIGNORE |
---|
| 1001 | /* If this (primitive) object is cacheable and is valid cache, |
---|
| 1002 | then modify start and set the xdr position accordingly |
---|
| 1003 | */ |
---|
| 1004 | if(node->cache.cacheable && node->cache.valid) { |
---|
| 1005 | if(node->cache.index <= start) { |
---|
| 1006 | localstart -= node->cache.index; |
---|
| 1007 | if(!xxdr_setpos(xdrs,node->cache.offset)) return xdrerror(); |
---|
| 1008 | } |
---|
| 1009 | } |
---|
| 1010 | #endif |
---|
| 1011 | |
---|
| 1012 | /* Compute how much to skip based on the content's cache index */ |
---|
| 1013 | localstart = start - content->cache.index; |
---|
| 1014 | if(localstart < 0) localstart = 0; |
---|
| 1015 | |
---|
| 1016 | /* extract count items; use xxdr_getbytes to speed up*/ |
---|
| 1017 | srcmem = memory; |
---|
| 1018 | switch (etype) { |
---|
| 1019 | case OC_Float64: case OC_Int64: case OC_UInt64: |
---|
| 1020 | readsize = count*2*XDRUNIT; |
---|
| 1021 | skipsize = localstart*2*XDRUNIT; |
---|
| 1022 | /* skip to start of what we want to read */ |
---|
| 1023 | if(!xxdr_skip(xdrs,skipsize)) OCGOTO(shortxdr); |
---|
| 1024 | if(!xxdr_opaque(xdrs,(char*)srcmem,readsize)) OCGOTO(shortxdr); |
---|
| 1025 | if(etype == OC_Float64) { |
---|
| 1026 | double* dp; |
---|
| 1027 | for(dp=(double*)srcmem,i=0;i<count;i++,dp++) { |
---|
| 1028 | double swap; |
---|
| 1029 | xxdrntohdouble((char*)dp,&swap); |
---|
| 1030 | *dp = swap; |
---|
| 1031 | } |
---|
| 1032 | } else if(!xxdr_network_order) { |
---|
| 1033 | unsigned long long* llp; |
---|
| 1034 | for(llp=(unsigned long long*)srcmem,i=0;i<count;i++,p++) { |
---|
| 1035 | swapinline64(llp); |
---|
| 1036 | } |
---|
| 1037 | } |
---|
| 1038 | break; |
---|
| 1039 | |
---|
| 1040 | case OC_String: case OC_URL: { |
---|
| 1041 | /* Read string by string */ |
---|
| 1042 | char* s = NULL; |
---|
| 1043 | char** pmem = (char**)srcmem; |
---|
| 1044 | /* First skip to the starting string */ |
---|
| 1045 | for(i=0;i<localstart;i++) { |
---|
| 1046 | unsigned int slen; |
---|
| 1047 | if(!xxdr_uint(xdrs,&slen)) OCGOTO(shortxdr); |
---|
| 1048 | slen = RNDUP(slen); |
---|
| 1049 | if(!xxdr_skip(xdrs,slen)) OCGOTO(shortxdr); |
---|
| 1050 | } |
---|
| 1051 | /* Read count strings */ |
---|
| 1052 | for(i=0;i<count;i++) { |
---|
| 1053 | off_t slen; |
---|
| 1054 | /* xxdr_string will always alloc the space */ |
---|
| 1055 | if(!xxdr_string(xdrs,&s,&slen)) |
---|
| 1056 | OCGOTO(shortxdr); |
---|
| 1057 | pmem[i] = s; |
---|
| 1058 | } |
---|
| 1059 | } break; |
---|
| 1060 | |
---|
| 1061 | |
---|
| 1062 | case OC_Char: case OC_Byte: case OC_UByte: |
---|
| 1063 | case OC_Int16: case OC_UInt16: |
---|
| 1064 | /* We need to store the xdr data locally until we can convert it out |
---|
| 1065 | because elemsize < sizeof(int) */ |
---|
| 1066 | srcmem = localmem; |
---|
| 1067 | if(count*elemsize > sizeof(localmem)) { |
---|
| 1068 | srcmem = (char*)ocmalloc(count*sizeof(unsigned int)); |
---|
| 1069 | if(srcmem == NULL) {stat = OCTHROW(OC_ENOMEM); goto done;} |
---|
| 1070 | } |
---|
| 1071 | /* fall thru */ |
---|
| 1072 | case OC_Int32: case OC_UInt32: |
---|
| 1073 | case OC_Float32: |
---|
| 1074 | readsize = (count)*XDRUNIT; |
---|
| 1075 | skipsize = (localstart)*XDRUNIT; |
---|
| 1076 | if(!xxdr_skip(xdrs,skipsize)) OCGOTO(shortxdr); |
---|
| 1077 | if(!xxdr_opaque(xdrs,(char*)srcmem,readsize)) OCGOTO(shortxdr); |
---|
| 1078 | if(!xxdr_network_order) { |
---|
| 1079 | for(p=(unsigned int*)srcmem,i=0;i<count;i++,p++) { |
---|
| 1080 | swapinline32(p); |
---|
| 1081 | } |
---|
| 1082 | } |
---|
| 1083 | break; |
---|
| 1084 | |
---|
| 1085 | default: OCPANIC("unexpected etype"); break; |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | /* Convert memory to right format */ |
---|
| 1089 | switch (etype) { |
---|
| 1090 | |
---|
| 1091 | case OC_Char: case OC_Byte: case OC_UByte: { |
---|
| 1092 | char* pmem = (char*)memory; |
---|
| 1093 | p = (unsigned int*)srcmem; |
---|
| 1094 | for(i=0;i<count;i++) { |
---|
| 1095 | unsigned int tmp = *p++; |
---|
| 1096 | *pmem++ = (unsigned char)tmp; |
---|
| 1097 | } |
---|
| 1098 | } break; |
---|
| 1099 | |
---|
| 1100 | case OC_Int16: case OC_UInt16: { |
---|
| 1101 | unsigned short* pmem = (unsigned short*)memory; |
---|
| 1102 | p = (unsigned int*)srcmem; |
---|
| 1103 | for(i=0;i<count;i++) { |
---|
| 1104 | unsigned int tmp = *p++; |
---|
| 1105 | *pmem++ = (unsigned short)tmp; |
---|
| 1106 | } |
---|
| 1107 | } break; |
---|
| 1108 | |
---|
| 1109 | default: |
---|
| 1110 | break; /* already handled above */ |
---|
| 1111 | } |
---|
| 1112 | |
---|
| 1113 | /* set cache */ |
---|
| 1114 | content->cache.index = start + count; /* should be our current index */ |
---|
| 1115 | content->cache.offset = xxdr_getpos(xdrs); /* should be our current position */ |
---|
| 1116 | |
---|
| 1117 | done: |
---|
| 1118 | return OCTHROW(stat); |
---|
| 1119 | |
---|
| 1120 | shortxdr: |
---|
| 1121 | content->cache.valid = 0; /* no longer valid */ |
---|
| 1122 | if(!ocerrorstring(xdrs)) |
---|
| 1123 | oc_log(LOGERR,"DAP DATADDS packet is apparently too short"); |
---|
| 1124 | stat = OCTHROW(OC_EDATADDS); |
---|
| 1125 | goto done; |
---|
| 1126 | } |
---|
| 1127 | |
---|
| 1128 | int |
---|
| 1129 | occountrecords(OCnode* node, XXDR* xdrs, size_t* nrecordsp) |
---|
| 1130 | { |
---|
| 1131 | int stat = OC_NOERR; |
---|
| 1132 | size_t nrecords = 0; |
---|
| 1133 | |
---|
| 1134 | if(node->octype != OC_Sequence) return OCTHROW(OC_EINVAL); |
---|
| 1135 | /* checkpoint the xdr position*/ |
---|
| 1136 | for(nrecords=0;;nrecords++) { |
---|
| 1137 | int tag = 0; |
---|
| 1138 | stat = ocskipinstance(node,xdrs,SKIPINSTANCE,&tag); |
---|
| 1139 | if(stat != OC_NOERR) break; |
---|
| 1140 | if(tag == EndOfSequence) break; |
---|
| 1141 | if(tag != StartOfSequence) { |
---|
| 1142 | oc_log(LOGERR,"missing/invalid begin/end record marker\n"); |
---|
| 1143 | stat = OC_EINVALCOORDS; |
---|
| 1144 | break; |
---|
| 1145 | } |
---|
| 1146 | if(stat != OC_NOERR) break; |
---|
| 1147 | } |
---|
| 1148 | if(nrecordsp != NULL) *nrecordsp = nrecords; |
---|
| 1149 | return OCTHROW(stat); |
---|
| 1150 | } |
---|
| 1151 | |
---|
| 1152 | |
---|
| 1153 | |
---|
| 1154 | #define tag "Error {\n" |
---|
| 1155 | |
---|
| 1156 | static int |
---|
| 1157 | ocerrorstring(XXDR* xdrs) |
---|
| 1158 | { |
---|
| 1159 | /* Check to see if the xdrs contains "Error {\n'; assume it is at the beginning of data */ |
---|
| 1160 | off_t avail = xxdr_getavail(xdrs); |
---|
| 1161 | char* data = (char*)malloc(avail); |
---|
| 1162 | if(!xxdr_setpos(xdrs,0)) return 0; |
---|
| 1163 | if(!xxdr_opaque(xdrs,data,avail)) return 0; |
---|
| 1164 | /* check for error tag at front */ |
---|
| 1165 | if(ocstrncmp(data,tag,sizeof(tag))==0) { |
---|
| 1166 | char* p; |
---|
| 1167 | if((p=strchr(data,'}')) != NULL) *(++p)='\0'; |
---|
| 1168 | oc_log(LOGERR,"Server error: %s",data); |
---|
| 1169 | /* Since important, report to stderr as well */ |
---|
| 1170 | fprintf(stderr,"Server error: %s",data); |
---|
| 1171 | return 1; |
---|
| 1172 | } |
---|
| 1173 | return 0; |
---|
| 1174 | } |
---|