clearification of keysize descriptor stuff
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1d6dd40713
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4702ee6467
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@ -28,50 +28,49 @@
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#include <stdlib.h>
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#include "keysize_descriptor.h"
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#define KS8 ((uint8_t*)ks_desc)
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uint8_t is_valid_keysize_P(const void* ks_desc, uint16_t keysize){
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uint8_t type;
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type = *((uint8_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 1;
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type = KS8[0];
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ks_desc = KS8 + 1;
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if(type==KS_TYPE_TERMINATOR)
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return 0;
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if(type==KS_TYPE_LIST){
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uint8_t items;
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uint16_t item;
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items = *((uint8_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 1;
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items = KS8[0];
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ks_desc = KS8 + 1;
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while(items--){
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item = *((uint16_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 2;
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item = KS8[1] * 256 + KS8[0];
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ks_desc = KS8 + 2;
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if(item==keysize)
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return 1;
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}
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ks_desc = (uint8_t*)ks_desc - 2;
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ks_desc = KS8 - 2;
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}
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if(type==KS_TYPE_RANGE){
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uint16_t max, min;
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min = *((uint16_t*)ks_desc);
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min = KS8[1] * 256 + KS8[0];
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ks_desc = (uint8_t*)ks_desc + 2;
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max = *((uint16_t*)ks_desc);
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if(min<=keysize && keysize<=max)
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max = KS8[1] * 256 + KS8[0];
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if(min <= keysize && keysize <= max)
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return 1;
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}
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if(type==KS_TYPE_ARG_RANGE){
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uint16_t max, min, dist, offset;
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min = *((uint16_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 2;
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max = *((uint16_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 2;
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dist = *((uint16_t*)ks_desc);
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ks_desc = (uint8_t*)ks_desc + 2;
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offset = *((uint16_t*)ks_desc);
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if(min<=keysize && keysize<=max && (keysize%dist==offset))
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min = KS8[1] * 256 + KS8[0];
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max = KS8[3] * 256 + KS8[2];
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dist = KS8[5] * 256 + KS8[4];
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offset = KS8[7] * 256 + KS8[6];
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ks_desc = KS8 + 6;
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if(min <= keysize && keysize <= max && (keysize % dist == offset))
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return 1;
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}
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if(type>KS_TYPE_ARG_RANGE){
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/* bad error, you may insert a big warning message here */
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return 0;
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}
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return is_valid_keysize_P((uint8_t*)ks_desc+1, keysize); /* search the next record */
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return is_valid_keysize_P(KS8+1, keysize); /* search the next record */
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}
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uint16_t get_keysize(const void* ks_desc){
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