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raw_packer.cpp
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450 lines (295 loc) · 7.33 KB
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/* raw_packer.cpp */
#include "raw_packer.h"
Error RawPacker::encode(const String& fmt, const Array& array, uint8_t *buf, int &len) {
len=0;
Variant::Type type;
int j=0;
for (int i=0;i<fmt.length();i++) {
ERR_FAIL_COND_V(j>=array.size(),ERR_INVALID_DATA);
type = array[j].get_type();
switch (fmt[i]) {
case 'c':
case 'b':
case 'B': {
ERR_FAIL_COND_V(type!=Variant::INT,ERR_INVALID_DATA);
if (buf) {
*buf=(uint8_t)array[j];
buf+=1;
}
len+=1;
} break;
case '?': {
ERR_FAIL_COND_V(type!=Variant::BOOL,ERR_INVALID_DATA);
if (buf) {
*buf=(uint8_t)array[j];
buf+=1;
}
len+=1;
} break;
case 'h':
case 'H': {
ERR_FAIL_COND_V(type!=Variant::INT,ERR_INVALID_DATA);
if (buf) {
encode_uint16((uint16_t)array[j],buf);
buf+=2;
}
len+=2;
} break;
case 'i':
case 'I':
//windows doesn't like longs
/*case 'l':
case 'L':*/ {
ERR_FAIL_COND_V(type!=Variant::INT,ERR_INVALID_DATA);
if (buf) {
encode_uint32((uint32_t)array[j],buf);
buf+=4;
}
len+=4;
} break;
case 'q':
case 'Q': {
ERR_FAIL_COND_V(type!=Variant::INT,ERR_INVALID_DATA);
if (buf) {
encode_uint64((uint64_t)array[j],buf);
buf+=8;
}
len+=8;
} break;
case 'f': {
ERR_FAIL_COND_V(type!=Variant::REAL,ERR_INVALID_DATA);
if (buf) {
encode_float((float)array[j],buf);
buf+= 4;
}
len += 4;
} break;
case 'd': {
ERR_FAIL_COND_V(type!=Variant::REAL,ERR_INVALID_DATA);
if (buf) {
encode_double((double)array[j],buf);
buf+=8;
}
len+=8;
} break;
case 's': {
ERR_FAIL_COND_V(type!=Variant::STRING,ERR_INVALID_DATA);
String size_str;
for (int k=i+1;k<fmt.length();k++) {
if (is_digit(fmt[k])) {
size_str.push_back(fmt[k]);
} else {
break;
}
}
size_str.push_back('\0');
i+=size_str.length();
int str_size = size_str.to_int();
if (str_size==0) {
if (buf) {
*buf='\0';
buf+=1;
}
len+=1;
} else {
if (buf) {
String str = (String)array[j];
int k=0;
for (;k<str.size()&&k<str_size;k++) {
*buf=str[k];
buf+=1;
}
for (;k<str_size;k++) {
*buf='\0';
buf+=1;
}
}
len+=str_size;
}
} break;
case 'v': {
ERR_FAIL_COND_V(type!=Variant::STRING,ERR_INVALID_DATA);
String str = (String)array[j];
if (buf) {
for (int k=0;k<str.size();k++) {
*buf=str[k];
buf+=1;
}
}
len += str.size();
} break;
default:
ERR_FAIL_V(ERR_INVALID_PARAMETER);
}
j++;
}
return OK;
}
Error RawPacker::decode(const String& fmt, Array& array, const uint8_t *buf, int size) {
int len=0;
for (int i=0;i<fmt.length();i++) {
switch (fmt[i]) {
case 'c':
case 'b': {
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA);
array.push_back(Variant((char)*buf));
buf+=1;
len+=1;
} break;
case 'B': {
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA);
array.push_back(Variant((unsigned char)*buf));
buf+=1;
len+=1;
} break;
case '?': {
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA);
array.push_back(Variant((bool)*buf));
buf+=1;
len+=1;
} break;
case 'h': {
ERR_FAIL_COND_V(size<len+2,ERR_INVALID_DATA);
array.push_back(Variant((short)decode_uint16(buf)));
buf+=2;
len+=2;
} break;
case 'H': {
ERR_FAIL_COND_V(size<len+2,ERR_INVALID_DATA);
array.push_back(Variant((unsigned short)decode_uint16(buf)));
buf+=2;
len+=2;
} break;
case 'i': {
ERR_FAIL_COND_V(size<len+4,ERR_INVALID_DATA);
array.push_back(Variant((int)decode_uint32(buf)));
buf+=4;
len+=4;
} break;
case 'I': {
ERR_FAIL_COND_V(size<len+4,ERR_INVALID_DATA);
array.push_back(Variant((unsigned int)decode_uint32(buf)));
buf+=4;
len+=4;
} break;
//windows doesn't like longs
/*case 'l': {
ERR_FAIL_COND_V(size<len+4,ERR_INVALID_DATA);
array.push_back(Variant((long)decode_uint32(buf)));
buf+=4;
len+=4;
} break;
case 'L': {
ERR_FAIL_COND_V(size<len+4,ERR_INVALID_DATA);
array.push_back(Variant((unsigned long)decode_uint32(buf)));
buf+=4;
len+=4;
} break;*/
case 'q': {
ERR_FAIL_COND_V(size<len+8,ERR_INVALID_DATA);
array.push_back(Variant((int64_t)decode_uint64(buf)));
buf+=8;
len+=8;
} break;
case 'Q': {
ERR_FAIL_COND_V(size<len+8,ERR_INVALID_DATA);
array.push_back(Variant((uint64_t)decode_uint64(buf)));
buf+=8;
len+=8;
} break;
case 'f': {
ERR_FAIL_COND_V(size<len+4,ERR_INVALID_DATA);
array.push_back(Variant((float)decode_float(buf)));
buf+=4;
len+=4;
} break;
case 'd': {
ERR_FAIL_COND_V(size<len+8,ERR_INVALID_DATA);
array.push_back(Variant((double)decode_double(buf)));
buf+=8;
len+=8;
} break;
case 's': {
String size_str;
for (int k=i+1;k<fmt.length();k++) {
if (is_digit(fmt[k])) {
size_str.push_back(fmt[k]);
} else {
break;
}
}
size_str.push_back('\0');
i+=size_str.length();
int str_size=size_str.to_int();
String str;
if (str_size==0) {
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA)
str.push_back('\0');
buf+=1;
len+=1;
} else {
ERR_FAIL_COND_V(size<len+str_size,ERR_INVALID_DATA)
int k=0;
while (*buf!='\0'&&k<str_size-1) {
str.push_back((char)*buf);
buf+=1;
k+=1;
}
str.push_back('\0');
buf+=(str_size-k);
len+=str_size;
}
array.push_back(str);
} break;
case 'v': {
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA);
String str;
while (*buf!='\0') {
str.push_back((char)*buf);
buf+=1;
len+=1;
ERR_FAIL_COND_V(size<len+1,ERR_INVALID_DATA);
}
str.push_back('\0');
buf+=1;
len+=1;
array.push_back(str);
} break;
default:
ERR_FAIL_V(ERR_INVALID_PARAMETER);
}
}
return OK;
}
bool RawPacker::is_digit(char c) {
return (c == '0' || c == '1' ||
c == '2' || c == '3' ||
c == '4' || c == '5' ||
c == '6' || c == '7' ||
c == '8' || c == '9');
}
ByteArray RawPacker::pack(const String& fmt, const Array& array) {
int len;
Error err = encode(fmt,array,NULL,len);
if (err!=OK)
return ByteArray();
ByteArray res;
res.resize(len);
ByteArray::Write w = res.write();
encode(fmt, array, w.ptr(), len);
return res;
}
Array RawPacker::unpack(const String& fmt, const ByteArray& array) {
Array res;
ByteArray::Read r = array.read();
Error err = decode(fmt,res,r.ptr(),array.size());
if (err!=OK)
return Array();
return res;
}
void RawPacker::_bind_methods() {
ObjectTypeDB::bind_method("pack",&RawPacker::pack);
ObjectTypeDB::bind_method("unpack",&RawPacker::unpack);
}
RawPacker::RawPacker() {
}