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); |
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481 | /* Set state of new content: node changes to field node */ |
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482 | ocsetcontent(fieldcontent,content, |
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483 | (OCnode*)oclistget(node->subnodes,index), |
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484 | packed); |
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485 | if(index >= content->cache.maxindex) { |
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486 | /* mark eod */ |
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487 | fieldcontent->mode = OCNULLMODE; |
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488 | } |
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489 | |
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490 | return OCTHROW(stat); |
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491 | } |
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492 | |
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493 | /* |
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494 | In order to actually extract data, |
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495 | one must move to the specific primitive typed |
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496 | field containing the data of interest by using |
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497 | ocfieldcontent(). |
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498 | Then, oc_getcontent() is invoked to extract |
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499 | some subsequence of items from the field. |
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500 | Note that oc_getcontent() will also work for scalars, |
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501 | but the start must be zero and the count must be one. |
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502 | */ |
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503 | |
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504 | int |
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505 | ocgetcontent(OCstate* state, OCcontent* content, void* memory, size_t memsize, |
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506 | size_t start, size_t count) |
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507 | { |
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508 | int stat = OC_NOERR; |
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509 | XXDR* xdrs; |
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510 | OCtype etype, octype; |
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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 | } |
---|