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qbinparse.cpp
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qbinparse.cpp
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#define KXVER 3
#include "k.h"
#undef kC
#include <stdint.h>
#include <string.h>
#include <stdexcept>
#include <vector>
#include <map>
//Patches for k.h to work under C++
inline char *kC(K k) {
return (char*)k->G0;
}
K kerror(const char *err) {
return krr(const_cast<S>(err));
}
K ksym(const char *s) {
return ks(const_cast<S>(s));
}
S ssym(const char *s) {
return ss(const_cast<S>(s));
}
K kdup(K k) {
if (k->r == 0) return k;
if (k->t != 11) return kerror("kdup: NYI type");
K result = ktn(k->t, k->n);
memcpy(kS(result), kS(k), sizeof(char*)*k->n);
r0(k);
return result;
}
//Parsing
inline G readByte(char *&ptr) {
G result = *ptr;
ptr += 1;
return result;
}
inline H readShort(char *&ptr) {
H result = *(uint16_t*)ptr;
ptr += 2;
return result;
}
inline uint16_t flipEndian(uint16_t val) {
return ((val & 0xff00) >> 8) | (val << 8);
}
inline H readBEShort(char *&ptr) {
uint16_t num = *(uint16_t*)ptr;
H result = flipEndian(num);
ptr += 2;
return result;
}
inline I readInt(char *&ptr) {
I result = *(uint32_t*)ptr;
ptr += 4;
return result;
}
inline uint32_t flipEndian(uint32_t val) {
return ((val & 0xff000000) >> 24) | ((val & 0x00ff0000) >> 8) | ((val & 0x0000ff00) << 8) | (val << 24);
}
inline I readBEInt(char *&ptr) {
uint32_t num = *(uint32_t*)ptr;
I result = flipEndian(num);
ptr += 4;
return result;
}
inline J readLong(char *&ptr) {
J result = *(uint64_t*)ptr;
ptr += 8;
return result;
}
inline E readReal(char *&ptr) {
E result = *(float*)ptr;
ptr += 4;
return result;
}
inline F readFloat(char *&ptr) {
F result = *(double*)ptr;
ptr += 8;
return result;
}
inline C readChar(char *&ptr) {
C result = *ptr;
ptr += 1;
return result;
}
inline I readDotNetVarLengthInt(char *&ptr) {
I result = 0;
int bit = 0;
uint8_t next;
do {
next = *ptr++;
result |= (next & 0x7f) << bit;
bit += 7;
} while (next & 0x80);
return result;
}
inline int getTypeSize(int typeNum) {
switch(typeNum) {
case -4: return 1;
case -5: return 2;
case -6: return 4;
case -7: return 8;
case -8: return 4;
case -9: return 8;
case -10: return 1;
}
return 0;
}
K parseRecord(K schema, char *&ptr, char *end, size_t schemaindex);
inline K tot(K records) { //to table - q should expose this feature
if(records->n == 0) return records;
for (J i=0; i<records->n; ++i) { //error messages may replace some records
if (kK(records)[i]->t != 99) return records;
}
J columnCount = kK(kK(records)[0])[0]->n;
if (columnCount == 0) return records;
K columns = ktn(0, columnCount);
K labels = r1(kK(kK(records)[0])[0]);
for (J i=0; i<columns->n; ++i) {
K col;
J length = records->n;
int recType = kK(kK(records)[0])[1]->t;
if (recType != 0) { //all record fields are the same atomic type
switch(recType) {
case KG:
col = ktn(KG, length);
for (J j=0; j<length; ++j) kG(col)[j] = kG(kK(kK(records)[j])[1])[i];
break;
case KH:
col = ktn(KH, length);
for (J j=0; j<length; ++j) kH(col)[j] = kH(kK(kK(records)[j])[1])[i];
break;
case KI:
col = ktn(KI, length);
for (J j=0; j<length; ++j) kI(col)[j] = kI(kK(kK(records)[j])[1])[i];
break;
case KJ:
col = ktn(KJ, length);
for (J j=0; j<length; ++j) kJ(col)[j] = kJ(kK(kK(records)[j])[1])[i];
break;
case KE:
col = ktn(KE, length);
for (J j=0; j<length; ++j) kE(col)[j] = kE(kK(kK(records)[j])[1])[i];
break;
case KF:
col = ktn(KF, length);
for (J j=0; j<length; ++j) kF(col)[j] = kF(kK(kK(records)[j])[1])[i];
break;
case KC:
col = ktn(KC, length);
for (J j=0; j<length; ++j) kF(col)[j] = kC(kK(kK(records)[j])[1])[i];
break;
default:
return kerror("unhandled atomic type in array!");
}
} else { //heterogeneous records
int colType = kK(kK(kK(records)[0])[1])[i]->t;
switch(colType) {
case -KG:
col = ktn(KG, length);
for (J j=0; j<length; ++j) kG(col)[j] = kK(kK(kK(records)[j])[1])[i]->g;
break;
case -KH:
col = ktn(KH, length);
for (J j=0; j<length; ++j) kH(col)[j] = kK(kK(kK(records)[j])[1])[i]->h;
break;
case -KI:
col = ktn(KI, length);
for (J j=0; j<length; ++j) kI(col)[j] = kK(kK(kK(records)[j])[1])[i]->i;
break;
case -KJ:
col = ktn(KJ, length);
for (J j=0; j<length; ++j) kJ(col)[j] = kK(kK(kK(records)[j])[1])[i]->j;
break;
case -KE:
col = ktn(KE, length);
for (J j=0; j<length; ++j) kE(col)[j] = kK(kK(kK(records)[j])[1])[i]->e;
break;
case -KF:
col = ktn(KF, length);
for (J j=0; j<length; ++j) kF(col)[j] = kK(kK(kK(records)[j])[1])[i]->f;
break;
case -KC:
col = ktn(KC, length);
for (J j=0; j<length; ++j) kC(col)[j] = kK(kK(kK(records)[j])[1])[i]->g;
break;
default:
col = ktn(0, length);
for (J j=0; j<length; ++j) kK(col)[j] = r1(kK(kK(kK(records)[j])[1])[i]);
}
}
kK(columns)[i] = col;
}
r0(records);
K result = xT(xD(labels, columns));
return result;
}
K appendGen(K list, K value) {
K result = ktn(0, list->n+1);
for (size_t i=0; i<list->n; ++i) {
switch(list->t) {
case 0: kK(result)[i] = r1(kK(list)[i]); break;
case KC: kK(result)[i] = kc(kC(list)[i]); break;
case KG: kK(result)[i] = kg(kG(list)[i]); break;
case KH: kK(result)[i] = kh(kH(list)[i]); break;
case KI: kK(result)[i] = ki(kI(list)[i]); break;
case KJ: kK(result)[i] = kj(kJ(list)[i]); break;
case KE: kK(result)[i] = ke(kE(list)[i]); break;
case KF: kK(result)[i] = kf(kF(list)[i]); break;
default: kK(result)[i] = ki(ni);
}
}
kK(result)[list->n] = value;
r0(list);
return result;
}
struct arraySizeResult {
enum {ok, endOfBuffer, badSizeSpec} status = ok;
uint32_t size = 0;
uint32_t guard = 0;
uint32_t sizeFieldIndex = 0;
bool constantSize = false; //xv
bool fixedSize = true; //size known in advance, e.g. xv OR size from other field
bool repeat = false;
char sizeMode;
};
arraySizeResult readArraySizeFromSchema(char *&recschema) {
arraySizeResult result;
result.sizeMode = *recschema;
++recschema;
switch(result.sizeMode) {
case 0:
result.constantSize = true;
result.size = *(uint32_t*)recschema;
break;
case 1: //"xz" - zero terminated
break;
case 2: //"tpb" - byte guard
case 3: //"tps" - short guard
case 4: //"tpi" - int guard
result.fixedSize = false;
result.guard = *(uint32_t*)recschema;
break;
case 5: //"repeat"
result.repeat = true;
result.fixedSize = false;
break;
case -4: //"xv" - use byte field
case -5: //"xv" - use short field
case -6: //"xv" - use int field
case -7: //"xv" - use long field
result.sizeFieldIndex = *(uint32_t*)recschema;
break;
default:
result.status = arraySizeResult::badSizeSpec;
return result;
}
recschema += 4;
return result;
}
arraySizeResult readArraySizeFromSchemaWithPartial(char *&recschema, K partialResult) {
arraySizeResult result = readArraySizeFromSchema(recschema);
switch(result.sizeMode) {
case -4: //"xv" - use byte field
result.size = kK(partialResult)[result.sizeFieldIndex]->g;
break;
case -5: //"xv" - use short field
result.size = kK(partialResult)[result.sizeFieldIndex]->h;
break;
case -6: //"xv" - use int field
result.size = kK(partialResult)[result.sizeFieldIndex]->i;
break;
case -7: //"xv" - use long field
result.size = kK(partialResult)[result.sizeFieldIndex]->j;
break;
default:
break;
}
return result;
}
arraySizeResult readArraySize(char *&ptr, char *end, char *&recschema, K partialResult) {
arraySizeResult result = readArraySizeFromSchemaWithPartial(recschema, partialResult);
if (ptr > end) {result.status = arraySizeResult::endOfBuffer; return result;}
switch(result.sizeMode) {
case 1:{ //"xz" - zero terminated
char *eptr = ptr;
while (eptr < end && *eptr != 0) ++eptr;
++eptr;
if (eptr > end) result.status = arraySizeResult::endOfBuffer;
result.size = eptr-ptr;
break;
};
//size already read by readArraySizeFromSchema
case 2:
case 3:
case 4:
break;
case 5:
break;
case 0:
break;
case -4:
case -5:
case -6:
case -7:
break;
default:
result.status = arraySizeResult::badSizeSpec;
}
return result;
}
inline K parseArray(K schema, char *&ptr, char *end, char *&recschema, K partialResult, int elementType, bool unsignedExt = false) {
arraySizeResult as = readArraySize(ptr, end, recschema, partialResult);
if (as.status == arraySizeResult::endOfBuffer) return ksym("endOfBuffer");
if (as.status == arraySizeResult::badSizeSpec) return ksym("invalidArraySizeSpecifier");
if (as.fixedSize) {
if (as.size >= 2100000000) {
ptr = end;
return ksym("tooLargeArray");
}
if (elementType > -20) {
int outElementType = elementType;
if (unsignedExt) outElementType -= 1;
K result = ktn(-outElementType, as.size);
uint64_t inSize = uint64_t(as.size)*getTypeSize(elementType);
uint64_t outSize = inSize;
if (unsignedExt) outSize *= 2;
if (outSize > 4200000000) {
ptr = end;
return ksym("tooLargeArray");
}
if (ptr+inSize > end) return ksym("arrayRunsPastInput");
if (unsignedExt) {
switch(elementType) {
case -5:{
uint16_t *in = (uint16_t*)ptr;
uint32_t *out = (uint32_t*)kG(result);
for (J i=0; i<as.size; ++i) {
*out++ = *in++;
}
break;
}
case -6:{
uint32_t *in = (uint32_t*)ptr;
uint64_t *out = (uint64_t*)kG(result);
for (J i=0; i<as.size; ++i) {
*out++ = *in++;
}
break;
}
default:
return ksym("cannotUnsign");
}
} else {
memcpy(kG(result), ptr, outSize);
}
ptr += inSize;
return result;
} else if (elementType <= -20) {
uint64_t fullsize = uint64_t(as.size)*sizeof(void*);
if(fullsize > 4200000000) {
ptr = end;
return ksym("tooLargeArray");
}
K result = ktn(0,as.size);
for (size_t i=0;i<as.size; ++i) {
kK(result)[i] = parseRecord(schema, ptr, end, (-elementType)-20);
}
K res = tot(result);
return res;
}
} else { //not fixedSize
if(elementType > -20) { //elements are atoms
int elementSize = getTypeSize(elementType);
J elementCount;
char *actualEnd;
if (as.repeat) {
actualEnd = end;
} else {
actualEnd = ptr;
while (actualEnd < end) {
bool cond = false;
switch(as.sizeMode) {
case 2:
cond = *(uint8_t *)actualEnd == as.guard;
break;
case 3:
cond = *(uint16_t *)actualEnd == as.guard;
break;
case 4:
cond = *(uint32_t *)actualEnd == as.guard;
break;
}
if (cond) break;
actualEnd += elementSize;
}
}
elementCount = (actualEnd-ptr)/elementSize;
K result = ktn(-elementType,elementCount);
memcpy(kG(result), ptr, elementCount*elementSize);
ptr = actualEnd;
return result;
} else { //elements are records
K result = ktn(0,0);
while(ptr < end) {
bool cond = false;
if (!as.repeat) {
switch(as.sizeMode) {
case 2:
cond = *(uint8_t *)ptr == as.guard;
break;
case 3:
cond = *(uint16_t *)ptr == as.guard;
break;
case 4:
cond = *(uint32_t *)ptr == as.guard;
break;
}
}
if (cond) break;
K rec = parseRecord(schema, ptr, end, (-elementType)-20);
jk(&result, rec);
}
return tot(result);
}
}
return ki(ni);
}
K parseCase(K schema, char *&ptr, char *end, char *&recschema, bool hasDefault,
K partialResult
) {
int8_t caseFieldType = *recschema;
++recschema;
uint32_t caseFieldIndex = *(uint32_t*)recschema;
recschema += 4;
uint8_t defaultRec = 0;
if(hasDefault) {
defaultRec = *recschema;
++recschema;
}
uint32_t caseFieldValue = 0;
switch(caseFieldType) {
case -4:
caseFieldValue = kK(partialResult)[caseFieldIndex]->g;
break;
case -5:
caseFieldValue = kK(partialResult)[caseFieldIndex]->h;
break;
case -6:
caseFieldValue = kK(partialResult)[caseFieldIndex]->i;
break;
case -7:
caseFieldValue = kK(partialResult)[caseFieldIndex]->j;
break;
case 10:
caseFieldValue = *(uint32_t*)kG(kK(partialResult)[caseFieldIndex]);
break;
default:
return ksym("invalidCaseFieldType");
}
uint32_t caseCount = *(uint32_t*)recschema;
recschema += 4;
bool found = false;
uint8_t caseRec = 0;
for (uint32_t i=0; i<caseCount; ++i) {
found = (*(uint32_t*)recschema) == caseFieldValue;
if(found) {
caseRec = *(recschema+4);
recschema += 5*(caseCount-i);
break;
}
recschema += 5;
}
if (!found) {
if(!hasDefault)
return ksym("noCaseMatch");
caseRec = defaultRec;
}
return parseRecord(schema, ptr, end, caseRec);
}
K parseField(K schema, char *&ptr, char *start, char *&end, char *&recschema, K partialResult);
K parseInterpretedArray(K schema, char *&ptr, char *end, char *&recschema, K partialResult) {
arraySizeResult as = readArraySize(ptr, end, recschema, partialResult);
if (as.status == arraySizeResult::badSizeSpec) return ksym("invalidArraySizeSpecifier");
char *tmpStart = ptr;
char *tmpPtr = ptr;
char *tmpEnd = ptr+as.size;
if (as.status == arraySizeResult::endOfBuffer) tmpEnd = ptr;
K result = parseField(schema, tmpPtr, tmpStart, tmpEnd, recschema, partialResult);
ptr = tmpEnd;
return result;
}
K parseExtType(K schema, char *&ptr, char *end, char *&recschema, K partialResult) {
uint8_t extSubtype = *recschema;
++recschema;
switch(extSubtype) {
case 1:
return parseCase(schema, ptr, end, recschema, false, partialResult);
case 2:
return parseCase(schema, ptr, end, recschema, true, partialResult);
case 3:
return kh(readBEShort(ptr));
case 4:
return ki(readBEInt(ptr));
case 5:
return parseInterpretedArray(schema, ptr, end, recschema, partialResult);
case 6:
return ki(readDotNetVarLengthInt(ptr));
case 7:
return ki((uint16_t)readShort(ptr));
case 8:
return kj((uint32_t)readInt(ptr));
case 9:
return ki((uint16_t)readBEShort(ptr));
case 10:
return kj((uint32_t)readBEInt(ptr));
default:
return ksym("invalidExtType");
}
}
K parseField(K schema, char *&ptr, char *start, char *&end, char *&recschema, K partialResult) {
char fieldType = *recschema;
++recschema;
bool isRecSize = false;
while (fieldType == 127) {
char op = *recschema;
++recschema;
if (op == 1) {
isRecSize = true;
}
fieldType = *recschema;
++recschema;
}
if (fieldType == -128) {
return parseExtType(schema, ptr, end, recschema, partialResult);
} else if (fieldType <= -20) {
return parseRecord(schema, ptr, end, (-fieldType)-20);
} else if (fieldType == 0) {
char elemType = *recschema;
++recschema;
if (elemType == -128) {
char elemExtType = *recschema;
++recschema;
switch(elemExtType) {
case 7:
return parseArray(schema, ptr, end, recschema, partialResult, -5, true);
case 8:
return parseArray(schema, ptr, end, recschema, partialResult, -6, true);
default:
return ksym("unknownArrayElementExtType");
}
} else {
return ksym("unknownArrayElementType");
}
} else if (fieldType > 0) {
return parseArray(schema, ptr, end, recschema, partialResult, -fieldType);
} else switch(fieldType) {
case -4:{
G val = readByte(ptr);
if (isRecSize) end = start+val;
return kg(val);
break;
}
case -5:{
H val = readShort(ptr);
if (isRecSize) end = start+val;
return kh(val);
break;
}
case -6:{
I val = readInt(ptr);
if (isRecSize) end = start+val;
return ki(val);
break;
}
case -7:{
J val = readLong(ptr);
if (isRecSize) end = start+val;
return kj(val);
break;
}
case -8:
return ke(readReal(ptr));
break;
case -9:
return kf(readFloat(ptr));
break;
case -10:
return kc(readChar(ptr));
break;
default:
return ksym("unknownFieldType");
}
}
K parseRecord(K schema, char *&ptr, char *end, size_t schemaindex) {
if (schemaindex >= kK(schema)[1]->n) {
return ksym("invalidSchemaId");
}
K fieldLabels = kK(kK(schema)[1])[schemaindex];
size_t fieldCount = fieldLabels->n;
if (fieldCount > 0 && ptr >= end) {
return ksym("endOfBuffer");
}
char *recschema = (char*)kC(kK(kK(schema)[2])[schemaindex]);
int resultType = 0; //create a simple list if all fields in the record are atomic types
char *schemaScan = recschema;
for (size_t i=0; i<fieldCount; ++i) {
int8_t nextType = *schemaScan;
++schemaScan;
if (nextType==-128) {
int8_t ext = *schemaScan;
++schemaScan;
switch(ext) {
case 3: nextType=-5; break;
case 4: nextType=-6; break;
case 6: nextType=-6; break;
}
}
if (nextType == 127) {
schemaScan+=2;
}
if (nextType>=0 || nextType<=-20) { resultType = 0; break; }
if (i > 0) {
if (resultType != -nextType) { resultType = 0; break; }
} else
resultType = -nextType;
}
char *start = ptr;
K result = ktn(resultType, fieldCount);
for (size_t i=0; i<fieldCount; ++i) {
if (resultType == 0) {
kK(result)[i] = parseField(schema, ptr, start, end, recschema, result);
} else {
char fieldType = *recschema;
++recschema;
switch(fieldType) {
case -4:
kG(result)[i] = readByte(ptr);
break;
case -5:
kH(result)[i] = readShort(ptr);
break;
case -6:
kI(result)[i] = readInt(ptr);
break;
case -7:
kJ(result)[i] = readLong(ptr);
break;
case -8:
kE(result)[i] = readReal(ptr);
break;
case -9:
kF(result)[i] = readFloat(ptr);
break;
case -10:
kC(result)[i] = readChar(ptr);
break;
case -128:
char ext = *recschema;
++recschema;
switch(ext) {
case 3:
kH(result)[i] = readBEShort(ptr);
break;
case 4:
kI(result)[i] = readBEInt(ptr);
break;
case 6:
kI(result)[i] = readDotNetVarLengthInt(ptr);
break;
}
break;
}
}
}
return xD(r1(fieldLabels),result);
}
// Serialization
class Buffer {
uint8_t *data_;
size_t pos_;
size_t limit_;
void ensureSpace(size_t size) {
while (pos_+size>limit_) grow();
}
public:
Buffer() : data_(new uint8_t[1000]), pos_(0), limit_(1000) {}
Buffer(const Buffer &other) = delete;
~Buffer() { delete[] data_; }
Buffer &operator=(const Buffer &other) = delete;
inline void grow() {
uint8_t *ndata = new uint8_t[10*limit_];
memcpy(ndata, data_, pos_);
delete[] data_;
data_ = ndata;
limit_ = 10*limit_;
}
Buffer &write(const Buffer &other) {
size_t size = other.size();
ensureSpace(size);
memcpy(data_+pos_, other.data(), size);
pos_+=size;
return *this;
}
Buffer &write(const uint8_t *from, size_t size) {
ensureSpace(size);
memcpy(data_+pos_, from, size);
pos_+=size;
return *this;
}
Buffer &writeFiller(size_t size) {
ensureSpace(size);
memset(data_+pos_, 0, size);
pos_+=size;
return *this;
}
template<typename T>
Buffer &write(T from) {
ensureSpace(sizeof(T));
*(T*)(data_+pos_) = from;
pos_+=sizeof(T);
return *this;
}
size_t size() const { return pos_; }
const uint8_t *data() const { return data_; }
};
template<typename Ct>
Ct getElemFromK(K k, size_t index) {
switch(k->t) {
case 0: {
K elem = kK(k)[index];
switch(elem->t) {
case -4:
return elem->g;
case -5:
return elem->h;
case -6:
return elem->i;
case -7:
return elem->j;
case -8:
return elem->e;
case -9:
return elem->f;
case -10:
return elem->g;
default:
throw std::runtime_error("getElemFromK can't read type "+std::to_string(elem->t)+" from general list");
}
}
case 4:
return kG(k)[index];
case 5:
return kH(k)[index];
case 6:
return kI(k)[index];
case 7:
return kJ(k)[index];
case 8:
return kE(k)[index];
case 9:
return kF(k)[index];
case 10:
return kC(k)[index];
default:
throw std::runtime_error("getElemFromK can't read type "+std::to_string(k->t)+" from simple list");
}
}
template<typename Ct, int Qt>
Buffer &unparseArray(Buffer &buf, char *&recschema, K inFieldElem) {
arraySizeResult arrsz = readArraySizeFromSchema(recschema);
if (arrsz.constantSize && arrsz.size != inFieldElem->n) {
throw std::runtime_error("expected "+std::to_string(arrsz.size)+" items, got "+std::to_string(inFieldElem->n));
}
if (inFieldElem->t == Qt) { //no conversion required
buf.write(kG(inFieldElem), sizeof(Ct)*inFieldElem->n);
} else {
for (size_t i=0; i<inFieldElem->n; ++i) {
Ct val = getElemFromK<Ct>(inFieldElem, i);
buf.write((uint8_t*)&val, sizeof(Ct));
}
}
return buf;
}
template<typename Ct>
Buffer &unparseArrayElement(Buffer &buf, K arr, J index) {
if (index > arr->n) {
throw std::runtime_error("array index out of bounds ("+std::to_string(index)+">"+std::to_string(arr->n)+")");
}
Ct val = getElemFromK<Ct>(arr, index);
buf.write((uint8_t*)&val, sizeof(Ct));
return buf;
}
Buffer &unparseRecord(Buffer &buf, K schema, K input, size_t schemaindex);
struct caseDesc {
//int8_t caseFieldType;
uint32_t caseFieldIndex;
bool hasDefault;
uint8_t defaultRec;
std::map<uint32_t, uint8_t> caseToRec;
};
caseDesc readCaseDesc(char *&recschema, bool hasDefault) {
caseDesc result;
//result.caseFieldType = *recschema;
++recschema;
result.caseFieldIndex = *(uint32_t*)recschema;
recschema += 4;
result.defaultRec = 0;
result.hasDefault = hasDefault;
if(hasDefault) {
result.defaultRec = *recschema;
++recschema;
}
uint32_t caseCount = *(uint32_t*)recschema;
recschema += 4;
for (uint32_t i=0; i<caseCount; ++i) {
uint32_t caseValue = *(uint32_t*)recschema;
uint8_t caseRec = *(recschema+4);
result.caseToRec[caseValue] = caseRec;
recschema += 5;
}
return result;
}
std::vector<int> matchFieldPos(K fieldLabels, K dict) {
K keys = kK(dict)[0];
if (keys->t != KS)
throw std::runtime_error("unexpected type in columns, type "+std::to_string(keys->t));
size_t fieldCount = fieldLabels->n;
std::vector<int> fieldPos(fieldCount);
for (size_t i=0; i<fieldCount; ++i) {
S fieldName = kS(fieldLabels)[i];
bool found = false;
for (size_t j=0; j<keys->n; ++j) {
if (fieldName == kS(keys)[j]) {
fieldPos[i] = j;
found = true;
break;
}
}
if (!found) {
throw std::runtime_error("missing field: "+std::string(fieldName));
}
}
return fieldPos;
}
Buffer &unparseRecordFieldsFromTable(Buffer &buf, K schema, size_t schemaindex, K values, const std::vector<int> &fieldPos, J i) {
K fieldLabels = kK(kK(schema)[1])[schemaindex];
size_t fieldCount = fieldLabels->n;
char *recschema = (char*)kC(kK(kK(schema)[2])[schemaindex]);
for (size_t j=0; j<fieldCount; ++j) {
K fieldArr = kK(values)[fieldPos[j]];
K inFieldElem = 0;
char fieldType = *recschema;
++recschema;
if ((fieldType<=-20 && fieldType > -128) || fieldType>0) {
if (fieldArr->t != 0) {
throw std::runtime_error("can't populate array field - record value is a simple list");
}
inFieldElem = kK(fieldArr)[i];
}
if (fieldType<=-20 && fieldType > -128) {
unparseRecord(buf, schema, inFieldElem, (-fieldType)-20);
} else try {
switch(fieldType) {
case -4:
unparseArrayElement<uint8_t>(buf,fieldArr,i);
break;
case -5:
unparseArrayElement<int16_t>(buf,fieldArr,i);
break;
case -6:
unparseArrayElement<int32_t>(buf,fieldArr,i);
break;
case -7:
unparseArrayElement<int64_t>(buf,fieldArr,i);
break;
case -8:
unparseArrayElement<float>(buf,fieldArr,i);
break;
case -9:
unparseArrayElement<double>(buf,fieldArr,i);
break;
case -10:
unparseArrayElement<char>(buf,fieldArr,i);
break;
case 4:
unparseArray<uint8_t,4>(buf, recschema, inFieldElem);
break;
case 10:
unparseArray<char,4>(buf, recschema, inFieldElem);
break;
case -128:{
char ext = *recschema;
++recschema;
switch(ext) {
case 1:
case 2:{
caseDesc cd = readCaseDesc(recschema, ext==2);
uint32_t caseFieldVal = getElemFromK<uint32_t>(kK(values)[fieldPos[cd.caseFieldIndex]], i);
size_t innerSchemaIndex = 0;
auto cur = cd.caseToRec.find(caseFieldVal);
if (cur == cd.caseToRec.end()) {
if (cd.hasDefault)
innerSchemaIndex = cd.defaultRec;
else
throw std::runtime_error("invalid case value "+std::to_string(caseFieldVal));
} else
innerSchemaIndex = cur->second;
unparseRecord(buf, schema, kK(fieldArr)[i], innerSchemaIndex);
break;
}
case 7:
unparseArrayElement<int16_t>(buf,fieldArr,i);
break;
case 8:
unparseArrayElement<int32_t>(buf,fieldArr,i);
break;
default:
throw std::runtime_error("unparseArrayOfRecords NYI extended field type "+std::to_string(ext));
}
break;
}
default:
throw std::runtime_error("unparseArrayOfRecords NYI field type "+std::to_string(fieldType));
}
} catch(const std::exception &e) {
throw std::runtime_error("["+std::to_string(i)+"]"+"."+kS(fieldLabels)[j]+": "+e.what());
}
}
return buf;
}
Buffer &unparseRecordFromTableRow(Buffer &buf, K schema, K table, J index, size_t schemaindex) {
K fieldLabels = kK(kK(schema)[1])[schemaindex];
K dict = table->k;
if (dict->t != XD)
throw std::runtime_error("unparseRecordFromTableRow unexpected value in table, type "+std::to_string(dict->t));
K values = kK(dict)[1];
if (values->t != 0)
throw std::runtime_error("unparseRecordFromTableRow unexpected type in values, type "+std::to_string(values->t));
std::vector<int> fieldPos = matchFieldPos(fieldLabels, dict);
unparseRecordFieldsFromTable(buf, schema, schemaindex, values, fieldPos, index);
return buf;
}
Buffer &unparseArrayOfRecords(Buffer &buf, char *&recschema, K schema, K inFieldElem, size_t schemaindex) {
arraySizeResult arrsz = readArraySizeFromSchema(recschema);
K fieldLabels = kK(kK(schema)[1])[schemaindex];
if (inFieldElem->t == 0) { //non-collapsed records
J elemCount = inFieldElem->n;
if (arrsz.constantSize && arrsz.size != elemCount) {
throw std::runtime_error("expected "+std::to_string(arrsz.size)+" items, got "+std::to_string(elemCount));
}
for (size_t i=0; i<elemCount; ++i) {
unparseRecord(buf, schema, kK(inFieldElem)[i], schemaindex);
}
} else if (inFieldElem->t == XT) { //collapsed records