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jsonr.c
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jsonr.c
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#include "json.h"
#include "adaboost.h"
char* readJson()
{
FILE* file = NULL;
file = fopen("training.json", "r");
if (file == NULL)
{
return NULL;
}
else
{
fseek(file, 0, SEEK_END);
long fsize = ftell(file);
fseek(file, 0, SEEK_SET);
char *string = malloc(fsize + 1);
fread(string, fsize, 1, file);
fclose(file);
string[fsize] = 0;
return string;
}
}
SCList* dbExtract()
{
char* str = readJson();
if (str == NULL)
{
printf("error: can not read training database\n");
// HERE IS A EXIT(0) JUST HERE !!! IN CASE OF BUG, REMOVE IT !!!
exit(0);
}
else
{
json_object *jobj = json_tokener_parse(str);
return jsonToStrongClassifierList(jobj);
}
}
SCList* jsonToStrongClassifierList(json_object* jStrongList)
{
int len = json_object_array_length(jStrongList);
SCList *old = NULL;
for (int i = len - 1; i >= 0; i--)
{
json_object *jStrongElt;
jStrongElt = json_object_array_get_idx(jStrongList, i);
SCList *strongList = malloc(sizeof(SCList));;
strongList->sc = jsonToStrongClassifier(jStrongElt);
strongList->next = old;
old = strongList;
}
return old;
}
StrongClassifier jsonToStrongClassifier(json_object *jStrongClass)
{
StrongClassifier strongClass;
json_object *jWeakL, *jTotalT, *jFalseNegative, *jWeakNumber;
json_object_object_get_ex(jStrongClass, "weak_classifier_list", &jWeakL);
json_object_object_get_ex(jStrongClass, "total_threshold", &jTotalT);
json_object_object_get_ex(jStrongClass, "false_negative", &jFalseNegative);
json_object_object_get_ex(jStrongClass, "weak_number", &jWeakNumber);
strongClass.weak = jsonToWeakClassifierList(jWeakL);
strongClass.totalThreshold = json_object_get_double(jTotalT);
strongClass.falseNegative = json_object_get_double(jFalseNegative);
strongClass.weakNumber = json_object_get_int(jWeakNumber);
return strongClass;
}
ClassifierList* jsonToWeakClassifierList(json_object *jWeakList)
{
int len = json_object_array_length(jWeakList);
ClassifierList *old = NULL;
for (int i = len - 1; i >= 0; i--)
{
json_object *jWeakElt, *jWeight, *jWeakClass;
jWeakElt = json_object_array_get_idx(jWeakList, i);
json_object_object_get_ex(jWeakElt, "weight", &jWeight);
json_object_object_get_ex(jWeakElt, "weak_classifier", &jWeakClass);
ClassifierList *weakList = malloc(sizeof(ClassifierList));;
weakList->weight = json_object_get_double(jWeight);
weakList->class = jsonToWeakClassifier(jWeakClass);
weakList->next = old;
old = weakList;
}
return old;
}
WeakClassifier jsonToWeakClassifier(json_object *jWeakClass)
{
WeakClassifier weakClass;
json_object *jXmin, *jYmin, *jXmax, *jYmax, *jType, *jParity, *jThreshold;
json_object_object_get_ex(jWeakClass, "xmin", &jXmin);
json_object_object_get_ex(jWeakClass, "ymin", &jYmin);
json_object_object_get_ex(jWeakClass, "xmax", &jXmax);
json_object_object_get_ex(jWeakClass, "ymax", &jYmax);
json_object_object_get_ex(jWeakClass, "type", &jType);
json_object_object_get_ex(jWeakClass, "parity", &jParity);
json_object_object_get_ex(jWeakClass, "threshold", &jThreshold);
weakClass.xmin = json_object_get_int(jXmin);
weakClass.ymin = json_object_get_int(jYmin);
weakClass.xmax = json_object_get_int(jXmax);
weakClass.ymax = json_object_get_int(jYmax);
weakClass.type = json_object_get_int(jType);
weakClass.parity = json_object_get_int(jParity);
weakClass.threshold = json_object_get_double(jThreshold);
return weakClass;
}